35 results on '"Jianzhi Sun"'
Search Results
2. Review of Generative Adversarial Networks in Object Detection
- Author
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Chenyang Zhou, Siman Kong, and Jianzhi Sun
- Published
- 2023
3. TLGRU: time and location gated recurrent unit for multivariate time series imputation
- Author
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Ruimin Wang, Zhenghui Zhang, Qiankun Wang, and Jianzhi Sun
- Abstract
Multivariate time series are widely used in industrial equipment monitoring and maintenance, health monitoring, weather forecasting and other fields. Due to abnormal sensors, equipment failures, environmental interference and human errors, the collected multivariate time series usually have certain missing values. Missing values imply the regularity of data, and seriously affect the further analysis and application of multivariate time series. Conventional imputation methods such as statistical imputation and machine learning-based imputation cannot learn the latent relationships of data and are difficult to use for missing values imputation in multivariate time series. This paper proposes a novel Time and Location Gated Recurrent Unit (TLGRU), which takes into account the non-fixed time intervals and location intervals in multivariate time series and effectively deals with missing values. We made necessary modifications to the architecture of the end-to-end imputation model $${E}^{2}$$ E 2 GAN and replaced Gated Recurrent Unit for Imputation (GRUI) with TLGRU to make the generated fake sample closer to the original sample. Experiments on a public meteorologic dataset show that our method outperforms the baselines on the imputation accuracy and achieves a new state-of-the-art result.
- Published
- 2022
4. Molybdenum Trioxide Microrods synthesized with Corn Straw as Biological Templates and its Electrochemical Performance in Aqueous Battery
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Jianzhi Sun, Yan Dong, Xinfang Wang, Chunyan Kong, Jinming Hong, and Chunhui Li
- Subjects
Renewable Energy, Sustainability and the Environment ,Electrochemistry ,General Materials Science - Abstract
In this paper, MoO3 microrods was prepared using corn straw as biological template via roasting process.The components and crystal characterization of the material were investigated via X-ray diffraction(XRD),scanning electron microscopy( SEM), and the electrochemistry property and mechanism was studied.The results show that the MoO3 material synthesized by template method is Orthorhombic structures.And the MoO3 particles were submicron and micron rods with uniform distribution and a smooth surface. MoO3 microrods had an average diameter that ranged from 1 to 2 μm. The result indicated that the MoO3 as the new negative of aluminum battery delivers a higher discharge capacity of 190 mAh/g at a scanning rate of 1mv/s, which showing good capacity and cycling performance.
- Published
- 2021
5. A new case of trisomy 5 with complex karyotype abnormalities in B-cell prolymphocytic leukemia: a case study
- Author
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Musa Makongoro, Mahmoud Matar Mohammad Abu Rakhey, Yafei Yu, Jianzhi Sun, Guosheng Li, Na He, Samir Ali Abd El-Kaream, and Daoxin Ma
- Subjects
Genetics (clinical) - Abstract
Background The B-cell prolymphocytic leukemia (B-PLL) diagnosis is challenging due to the superposition with mature B-cell leukemia and/or lymphoma. Objective An insight case study of trisomy 5 with complex karyotype abnormalities in B-cell prolymphocytic leukemia. Subject and methods A 72-year-old man was referred to the Hematology Department, Qilu Hospital, Shandong University, because of persistent fever (10 days) and lymphocytosis. A detailed diagnostic methods including complete blood count, bone marrow aspiration, flow cytometry, conventional karyotype analysis, fluorescence in situ hybridization (FISH), quantitative real-time polymerase chain reaction (qRT-PCR), next-generation sequencing technology (NGS) used to detect 41 kinds of mutant genes related to hematological malignancies were conducted and reasonable therapeutic regimens including emergent leukapheresis accompanied by basification of urine and hydrotherapy, followed by a regimen of cyclophosphamide and dexamethasone. Results Subject white blood cell count was 143.43 × 109/L, and 56% prolymphocytes. He did not show lymphadenopathy but splenomegaly. Immunophenotyping of prolymphocytes was CD5(+low), CD10(−), CD11c(−), CD19(+), CD20(+), cCD22(+), CD23(−), cCD79a(+), CD79b(+), FMC7(±), CD43(−), CD3(−), CD56(−), CD103(−), HLA-DR(+), and Lambda(+). R-banding and FISH revealed that leukemia cells carried extra chromosome 5. Considering the rare occurrence of trisomy 5 found in prolymphocytic leukemia, especially in Asians, with rapid disease progression. We know that median survival of B-PLL is three years after diagnosis, while survival time of this patient was only 1 month. Conclusion This study could provide the firsthand materials for precision, medicine and mechanism research in cytogenetics and molecular biology. It inferred that trisomy 5 might be a poor prognosis indicator, providing directions for clinical practice in the foreseeable future.
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- 2022
6. Research Progress in Biohydrometallurgy of Rare Metals and Heavy Nonferrous Metals with an Emphasis on China
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Jianzhi Sun, Bowei Chen, He Shang, Xiaolan Mo, and Jiankang Wen
- Published
- 2022
7. Recent advances in the recovery of germanium during the zinc refining process
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Xilin Geng, Ying Liu, Wei Zhang, Liangshi Wang, Jiankang Wen, and Jianzhi Sun
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General Chemical Engineering ,Environmental Chemistry ,General Chemistry ,Industrial and Manufacturing Engineering - Published
- 2022
8. Hepatoprotective effect and metabonomics studies of radix gentianae in rats with acute liver injury
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Jianzhi Sun, Shizhao Xu, Yalin Xi, Zhengwu Sun, Fanli Kong, and Fei Qi
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Male ,Pharmaceutical Science ,Administration, Oral ,Context (language use) ,RM1-950 ,Traditional Chinese medicine ,Steroid biosynthesis ,Pharmacology ,Protective Agents ,Rats, Sprague-Dawley ,chemistry.chemical_compound ,Drug Discovery ,medicine ,pharmacodynamics ,Animals ,Metabolomics ,Gentiana ,Carbon Tetrachloride ,Liver injury ,Dose-Response Relationship, Drug ,business.industry ,Plant Extracts ,Liver Diseases ,General Medicine ,Glutathione ,medicine.disease ,metabolic mechanism ,Rats ,Metabolic pathway ,Disease Models, Animal ,Complementary and alternative medicine ,chemistry ,Pharmacodynamics ,Carbon tetrachloride ,Molecular Medicine ,Therapeutics. Pharmacology ,molecular mechanism ,business ,Biomarkers ,Research Article - Abstract
Context As a well-known traditional Chinese medicine for protecting the liver, the mechanism of Radix Gentianae (RG) remains unclear. Objective The hepatoprotective effect and metabonomics of RG were studied to explore the molecular and metabolic mechanisms of RG protecting the liver. Materials and methods Sprague-Dawley rats were divided into control and model group (n = 10, orally given distilled water), intervention group (4 subgroups, n = 10, prophylactically and orally given 0.63, 2.5 and 5.6 g/kg RG and 0.2 g/kg bifendatatum for 7 d). On day 7 of the intervention, all rats except the control were injected intraperitoneally with 2.5% carbon tetrachloride vegetable oil solution (1.5 mL/kg) to induce liver injury. After 24 h of carbon tetrachloride injection, rat serum and liver tissue were collected for determining AST, ALT, TNF-α, MCP-1, IL-6, SOD, MDA, GSH, and GSH-PX. Rat serum was used for analysing endogenous metabolism by UPLC-Q-TOF-MS. Results Different doses of RG can significantly decrease the levels of AST, ALT, TNF-α, MCP-1, IL-6 and MDA, and increase the levels of SOD, GSH, and GSH-PX in rats with liver injury (p
- Published
- 2021
9. Soliton excitation for a coherently coupled nonlinear Schrödinger system in optical fibers with two orthogonally polarized components
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Jianzhi Sun, Yu-Lan Ma, and Bang-Qing Li
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Physics ,Optical fiber ,Auxiliary function ,01 natural sciences ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials ,law.invention ,010309 optics ,symbols.namesake ,Nonlinear system ,Nonlinear Sciences::Exactly Solvable and Integrable Systems ,law ,Quantum electrodynamics ,Excited state ,0103 physical sciences ,Soliton propagation ,symbols ,Soliton ,Electrical and Electronic Engineering ,010306 general physics ,Nonlinear Sciences::Pattern Formation and Solitons ,Excitation ,Schrödinger's cat - Abstract
Soliton excitation is investigated for a coherently coupled nonlinear Schrodinger system, which describes soliton propagation in optical fibers with two orthogonally polarized components. Analytical soliton solutions, in which two free functions are involved, are constructed via the auxiliary function method. Special solitons can be excited by setting the free functions as some specific functions. S-type, V-type, W-type, periodic wave and doubly periodic wave solitons are excited and demonstrated graphically.
- Published
- 2018
10. Investigation on the urinary excretion kinetics of three atractylenolides from crude and processed Atractylodis rhizoma extracts in rats by UPLC-MS/MS
- Author
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Yuhan, Liu, Xiaojie, Qi, Yuqiang, Liu, Qian, Cai, Shujing, Liu, Jianzhi, Sun, and Xin, Lv
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Male ,Rats, Sprague-Dawley ,Lactones ,Renal Elimination ,Plant Extracts ,Tandem Mass Spectrometry ,Administration, Oral ,Animals ,Atractylodes ,Models, Biological ,Sesquiterpenes ,Rhizome ,Chromatography, Liquid - Abstract
Atractylodis rhizoma is a frequently-used traditional Chinese medicine in clinical practice, which have the effect of eliminating dampness and tonifying spleen. And after being processed with wheat bran, the dryness of A. rhizoma is reduced, and the function of tonifying spleen is enhanced. Atractylenolides are the major bioactive components of A. rhizoma, including atractylenolide I (AI), atractylenolide Ⅱ (AⅡ) and atractylenolide Ⅲ (AⅢ). The present study aimed to develope a new UPLC-MS/MS method for simultaneous quantification of three atractylenolides in rat urine, and applied to the excretory kinetics in Sprague-Dawley rats after oral administration of crude and processed A. rhizoma extracts. Analytes and internal standard were detected without interference in the multiple reaction monitoring (MRM) mode with positive electrospray ionization. The excretory kinetics parameters were calculated by a urine drug analysis model of drug and statistics (DAS) 3.2.8 software. The t1/2 and Ke of three atractylenolides had no significant difference between crude and processed A. rhizoma, but the recovery accumulative excretion of them in processed A. rhizoma were apparently higher than the crude ones (p0.05, p0.01). The results showed that only a small amount of atractylenolides excreted in urine and processing A. rhizoma with wheat bran by stir frying could promote the urinary excretion of them.
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- 2020
11. Multiple-Lump Waves and Their Breaking Properties for a Thermophoretic Motion System in a Graphene Sheet
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Wenyang Guan, Tie-Mei Yang, Yulan Ma, Jianzhi Sun, and Bang-Qing Li
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Physics ,Condensed matter physics ,Graphene ,02 engineering and technology ,021001 nanoscience & nanotechnology ,01 natural sciences ,law.invention ,010101 applied mathematics ,law ,General Materials Science ,0101 mathematics ,0210 nano-technology ,Nonlinear Sciences::Pattern Formation and Solitons ,Motion system - Abstract
A thermophoretic motion system with a variable heat transmission factor is investigated, which describes wrinkling soliton propagation in a substrate-supported graphene sheet. Analytic multiple-lump wave solutions are constructed via the Hirota bilinear method and symbolic computation. A numerical simulation shows that the system exhibits breaking lump waves. The system parameters control the open width and number of breaking gaps. These results should contribute to a better understanding of the propagation characteristics of wrinkling solitons in a complex graphene thermophoretic motion system.
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- 2018
12. UPLC-MS/MS of Atractylenolide I, Atractylenolide II, Atractylenolide III, and Atractyloside A in Rat Plasma after Oral Administration of Raw and Wheat Bran-Processed Atractylodis Rhizoma
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Qian Cai, Yuhan Liu, Jianzhi Sun, Yuqiang Liu, Xin Lv, Xiaojie Qi, and Shi-Zhao Xu
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Dietary Fiber ,Calibration curve ,wheat bran processing ,Pharmaceutical Science ,Administration, Oral ,Atractylodis Rhizoma ,integral pharmacokinetics ,Atractyloside ,01 natural sciences ,Article ,Analytical Chemistry ,lcsh:QD241-441 ,Rats, Sprague-Dawley ,03 medical and health sciences ,Lactones ,0302 clinical medicine ,lcsh:Organic chemistry ,Pharmacokinetics ,Oral administration ,Limit of Detection ,Tandem Mass Spectrometry ,Drug Discovery ,Animals ,Physical and Theoretical Chemistry ,Chromatography, High Pressure Liquid ,Chromatography ,biology ,Bran ,Chemistry ,010401 analytical chemistry ,Organic Chemistry ,Selected reaction monitoring ,Area under the curve ,Reproducibility of Results ,Atractylodes ,biology.organism_classification ,0104 chemical sciences ,Chemistry (miscellaneous) ,UPLC-MS/MS ,030220 oncology & carcinogenesis ,Area Under Curve ,Linear Models ,Molecular Medicine ,Atractylodes lancea ,Sesquiterpenes ,Rhizome - Abstract
Atractylodis Rhizoma is the dried rhizome of Atractylodes lancea (Thunb.) DC. or Atractylodes chinensis (DC.) Koidz and is often processed by stir-frying with wheat bran to reduce its dryness and increase its spleen tonifying activity. However, the mechanism by which the processing has this effect remains unknown. To explain the mechanism based on the pharmacokinetics of the active compounds, a rapid, sensitive ultra-performance liquid chromatography-tandem mass spectrometry method was developed to analyze atractylenolides I, II, and III, and atractyloside A simultaneously in rat plasma after oral administration of raw and processed Atractylodis Rhizoma. Acetaminophen was used as the internal standard and the plasma samples were pretreated with methanol. Positive ionization mode coupled with multiple reaction monitoring mode was used to analyze the four compounds. The method validation revealed that all the calibration curves displayed good linear regression over the concentration ranges of 3.2&ndash, 350, 4&ndash, 500, 4&ndash, 500, and 3.44&ndash, 430 ng/mL for atractylenolides I, II, and III, and atractyloside A, respectively. The relative standard deviations of the intra- and inter-day precisions of the four compounds were less than 6% with accuracies (relative error) below 2.38%, and the extraction recoveries were more than 71.90 ±, 4.97%. The main pharmacokinetic parameters of the four compounds were estimated with Drug and Statistics 3.0 and the integral pharmacokinetics were determined based on an area under the curve weighting method. The results showed that the integral maximum plasma concentration and area under the curve increased after oral administration of processed Atractylodis Rhizoma.
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- 2018
13. Research on Frequency Tracking Technology of High Frequency Induction Equipment
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Jing Xu, Baigong Wu, Rujian Wu, Wang Xianjian, Jianzhi Sun, and Qiuping Wang
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History ,Computer science ,Real-time computing ,Tracking (particle physics) ,Computer Science Applications ,Education - Abstract
With the development of luxury cruise ships and large offshore platforms, the use of high-frequency electromagnetic heating power sources to replace fireworks for thin steel plate leveling is a new development trend in the shipping and offshore industries. The technical difficulty of high-frequency induction power supplies is frequency track. The frequency tracking circuit in this article uses CD4046 as the core, which not only realizes frequency tracking but also realizes the dead time setting, ensures that the power supply can realize frequency scanning and maximum frequency tracking, and ensures that the circuit always works in resonance or quasi-resonance state, The output is more efficient at this time.
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- 2021
14. Manufacture of sodium-free lithium chloride from salt lake brine
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Yan Dong, Jianzhi Sun, and Chunyan Kong
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Ion exchange ,Sodium ,Inorganic chemistry ,chemistry.chemical_element ,Filtration and Separation ,Analytical Chemistry ,Separation process ,Ammonia ,chemistry.chemical_compound ,Brine ,chemistry ,Pulmonary surfactant ,Lithium chloride ,Solubility - Abstract
Process assessment experiment was conducted to investigate the applicability of integration technology (CCI, concentration, cooling and ion exchange) to manufacture sodium-free lithium chloride from salt lake brine. The preliminary separation process of sodium from brine, using evaporating concentration by adding surfactant, showed the amount of sodium in brine decreases to below 0.187%. Then, brine was further cooling separation process which was characterized in that the ammonia is added in order to decrease the solubility of NaCl. The purification of lithium chloride from cooling brine was then conducted with a novel separation process which was designed by a novel ion exchange method using inorganic ion-exchanger Li 1.4 Cr 0.4 Ti 1.6 (PO 4 ) 3 . The total yield of LiCl with the present purification process was 86.16%, and the sodium concentration in the supernatant is 0.0005 wt.%.
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- 2014
15. Synthesis of Na2MnFe(CN)6 and its Application as Cathode Material for Aqueous Rechargeable Sodium-ion Battery
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Yan Dong, Jianzhi Sun, and Chunyan Kong
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Battery (electricity) ,Prussian blue ,Aqueous solution ,Materials science ,Renewable Energy, Sustainability and the Environment ,Precipitation (chemistry) ,Discharge current ,Inorganic chemistry ,Sodium-ion battery ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Electrochemistry ,01 natural sciences ,0104 chemical sciences ,chemistry.chemical_compound ,chemistry ,Cathode material ,General Materials Science ,0210 nano-technology - Abstract
Prussian Blue type Na2MnFe(CN)6 was prepared by direct precipitation method and a subsequent drying procedure as a cath-ode material for aqueous rechargeable sodium-ion batteries. XRD patterns showed that Na2MnFe(CN)6 has a typical Prussian Blue struc-ture with space group Fm3m. Na2MnFe(CN)6 presents good electrochemical behaviors at 10 mAg-1 discharge current density with specific capacity 73.1 mAhg-1 after 30 cycles. The results show that Na2MnFe(CN)6 could be a potential cathode material for aqueous Sodium-ion battery.
- Published
- 2016
16. Determination of phthalic acid esters in Chinese white spirit using dispersive liquid-liquid microextraction coupled with sweeping β-cyclodextrin-modified micellar electrokinetic chromatography
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Shuhui Liu, Hui He, and Jianzhi Sun
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Detection limit ,chemistry.chemical_classification ,Chromatography ,Cyclodextrin ,Chemistry ,Dibutyl phthalate ,Extraction (chemistry) ,Filtration and Separation ,Micellar electrokinetic chromatography ,Analytical Chemistry ,chemistry.chemical_compound ,Phthalic acid ,Sodium dodecyl sulfate ,White spirit - Abstract
A simple method that consumes low organic solvent is proposed for the analysis of phthalic acid esters in Chinese white spirit using dispersive liquid-liquid microextraction coupled with sweeping-micellar electrokinetic chromatography. Tetrachloromethane and white-spirit-containing ethanol were used as the extraction and dispersing solvents, respectively. The electrophoresis separation buffer was composed of 5 mM β-cyclodextrin, 50 mM sodium dodecyl sulfate and 25 mM borate buffer (pH 9.2) with 9% acetonitrile, enabling the baseline resolution of the analytes within 13 min. Under the optimum conditions, satisfactory linearities (5-1000 ng/mL, r ≥ 0.9909), good reproducibility (RSD ≤ 6.7% for peak area, and RSD ≤ 2.8% for migration time), low detection limits (0.4-0.8 ng/mL) and acceptable recovery rates (89.6-105.7%) were obtained. The proposed method was successfully applied to 22 Chinese white spirits, and the content of dibutyl phthalate in 55% of the samples exceeded the Specific Migration Limit of 0.3 mg/kg established by the domestic and international regulations.
- Published
- 2014
17. Determination of phthalate esters in edible oils by use of QuEChERS coupled with ionic-liquid-based dispersive liquid–liquid microextraction before high-performance liquid chromatography
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Jianzhi Sun, Xiaoke Zhang, Qilong Xie, Yingying Fan, and Shuhui Liu
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Liquid Phase Microextraction ,Phthalic Acids ,Ionic Liquids ,Food Contamination ,Endocrine Disruptors ,Signal-To-Noise Ratio ,Quechers ,Biochemistry ,High-performance liquid chromatography ,Analytical Chemistry ,chemistry.chemical_compound ,Limit of Detection ,Plant Oils ,Sample preparation ,Chromatography, High Pressure Liquid ,Detection limit ,Chromatography ,Extraction (chemistry) ,Phthalate ,Reproducibility of Results ,Esters ,Dibutyl Phthalate ,Phthalic acid ,chemistry ,Ionic liquid ,Food Analysis ,Water Pollutants, Chemical - Abstract
A selective and low organic-solvent-consuming method of sample preparation combined with high-performance liquid chromatography with diode-array detection is introduced for analysis of phthalic acid esters in edible oils. Sample treatment involves initial liquid–liquid partitioning with acetonitrile, then QuEChERS cleanup by dispersive solid-phase extraction with primary secondary amine as sorbent. Preconcentration of the analytes is performed by ionic-liquid-based dispersive liquid–liquid microextraction, with the cleaned-up extract as disperser solvent and 1-hexyl-3-methylimidazolium hexafluorophosphate as extraction solvent. Under the optimized conditions, correlation coefficients (r) were 0.998–0.999 and standard errors (S y/x ) were 2.67–3.37 × 103 for calibration curves in the range 50–1000 ng g−1. Detection limits, at a signal-to-noise ratio of 3, ranged from 6 to 9 ng g−1. Intra-day and inter-day repeatability, expressed as relative standard deviation, were in the ranges 1.0–6.9 % and 2.4–9.4 %, respectively. Recovery varied between 84 % and 106 %. The developed method was successfully used for analysis of the analytes in 28 edible oils. The dibutyl phthalate content of four of the 28 samples (14 %) exceeded the specific migration limit established by domestic and international regulations.
- Published
- 2014
18. Comparison of the Modulatory Effect on Intestinal Microbiota between Raw and Bran-Fried Atractylodis Rhizoma in the Rat Model of Spleen-Deficiency Syndrome
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Qian Cai, Jian Pang, Shanpeng Ma, Xiaoying Xu, Beixue Zhang, Jianzhi Sun, Xin Lv, and Yujun Jiang
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Dietary Fiber ,Male ,intestinal microbiota ,Health, Toxicology and Mutagenesis ,Atractylodis Rhizoma ,mechanism ,lcsh:Medicine ,Spleen ,Traditional Chinese medicine ,Pharmacology ,Article ,Rats, Sprague-Dawley ,Feces ,03 medical and health sciences ,0302 clinical medicine ,16S rDNA ,medicine ,Animals ,Medicine, Chinese Traditional ,bran-fried ,spleen-deficiency syndrome ,Splenic Diseases ,030304 developmental biology ,0303 health sciences ,Gastrointestinal tract ,Bacteria ,biology ,Bran ,lcsh:R ,digestive, oral, and skin physiology ,Therapeutic effect ,Public Health, Environmental and Occupational Health ,food and beverages ,Atractylodes ,biology.organism_classification ,Gastrointestinal Microbiome ,Rats ,Disease Models, Animal ,medicine.anatomical_structure ,Mechanism of action ,030220 oncology & carcinogenesis ,medicine.symptom ,Bacteroides ,Rhizome ,Hormone - Abstract
Atractylodis Rhizoma (AR), a kind of well-known traditional Chinese medicine (TCM), has a long history of being used to treat spleen-deficiency syndrome (SDS). Stir frying with bran is a common method of processing AR, as recorded in the Chinese Pharmacopoeia, and is thought to enhance the therapeutic effect in TCM. Our previous studies have confirmed that bran-fried AR is superior to raw AR in terms of the improvement of gastrointestinal tract function. However, the biological mechanism of action is not yet clear. Here, we report the difference between raw and bran-fried AR in terms of the modulatory effect of intestinal microbiota. We found that the composition of intestinal microbiota of SDS rats changed significantly compared with healthy rats and tended to recover to normal levels after treatment with raw and bran-fried AR. Nine bacteria closely related to SDS were identified at the genus level. Among them, the modulatory effect between the raw and bran-fried AR was different. The improved modulation on Bacteroides, Escherichia-Shigella, Phascolarctobacterium, Incertae-Sedis (Defluviitaleaceae Family) and Incertae-Sedis (Erysipelotrichaceae Family) could be the mechanism by which bran-fried AR enhanced the therapeutic effect. Correlation analysis revealed that the modulation on intestinal microbiota was closely related to the secretion and expression of cytokines and gastrointestinal hormones. These findings can help us to understand the role and significance of bran-fried AR against SDS.
- Published
- 2019
19. Optimal Reliable Point-in-Polygon Test and Differential Coding Boolean Operations on Polygons
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Jianqiang Hao, Jianzhi Sun, Li Tan, Yi Chen, and Qiang Cai
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Correctness ,Physics and Astronomy (miscellaneous) ,Geometric probability ,Computer science ,probability ,General Mathematics ,Stability (learning theory) ,02 engineering and technology ,010502 geochemistry & geophysics ,01 natural sciences ,Point in polygon ,point-in-polygon ,parallel ,0202 electrical engineering, electronic engineering, information engineering ,Computer Science (miscellaneous) ,ComputingMethodologies_COMPUTERGRAPHICS ,0105 earth and related environmental sciences ,Boolean operations on polygons ,Intersection (set theory) ,lcsh:Mathematics ,020207 software engineering ,Differential calculus ,3D printing ,lcsh:QA1-939 ,Chemistry (miscellaneous) ,boolean operations ,code ,Polygon ,Algorithm ,MathematicsofComputing_DISCRETEMATHEMATICS - Abstract
This paper provides a full theoretical and experimental analysis of a serial algorithm for the point-in-polygon test, which requires less running time than previous algorithms and can handle all degenerate cases. The serial algorithm can quickly determine whether a point is inside or outside a polygon and accurately determine the contours of input polygon. It describes all degenerate cases and simultaneously provides a corresponding solution to each degenerate case to ensure the stability and reliability. This also creates the prerequisites and basis for our novel boolean operations algorithm that inherits all the benefits of the serial algorithm. Using geometric probability and straight-line equation F ( P ) = ( y i &minus, y i + 1 ) ( x p &minus, x i ) &minus, ( y i &minus, y p ) ( x i + 1 &minus, x i ) , it optimizes our two algorithms that avoid the division operation and do not need to compute any intersection points. Our algorithms are applicable to any polygon that may be self-intersecting or with holes nested to any level of depth. They do not have to sort the vertices clockwise or counterclockwise beforehand. Consequently, they process all edges one by one in any order for input polygons. This allows a parallel implementation of each algorithm to be made very easily. We also prove several theorems guaranteeing the correctness of algorithms. To speed up the operations, we assign each vector a number code and derive two iterative formulas using differential calculus. However, the experimental results as well as the theoretical proof show that our serial algorithm for the point-in-polygon test is optimal and the time complexities of all algorithms are linear. Our methods can be extended to three-dimensional space, in particular, they can be applied to 3D printing to improve its performance.
- Published
- 2018
20. Determination of Riboflavin in Cereal Grains by Capillary Electrophoresis with Laser-Induced Fluorescence Detection with On-Line Concentration
- Author
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Jianzhi Sun, Jie Chen, and Shuhui Liu
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Detection limit ,Chromatography ,Biochemistry (medical) ,Clinical Biochemistry ,Analytical chemistry ,food and beverages ,Biochemistry ,Fluorescence ,Analytical Chemistry ,chemistry.chemical_compound ,Capillary electrophoresis ,chemistry ,Standard addition ,Electrochemistry ,Sodium dodecyl sulfate ,Laser-induced fluorescence ,Phosphoric acid ,Quantitative analysis (chemistry) ,Spectroscopy - Abstract
A very simple, sensitive, and reliable method for the routine determination of riboflavin in cereal grains by capillary electrophoresis with laser-induced fluorescence detection (CE-LIF) was established. Two on-line concentration techniques, namely, stacking in reverse migrating micelles (SRMM) and sweeping, were examined to enhance the detection signal. The optimum separation buffer consisted of 20 mM phosphoric acid and 140 mM sodium dodecyl sulfate (SDS), and a hydrodynamic injection of 30 s at 0.5 psi was confirmed for the introduction of a sample. In addition, it was found that salt in sample matrix influenced the performance of SRMM, showing the standard addition method was required for the quantitative analysis. The linearity of the method was good with a range of 0.5–500 ng/mL (r = 0.9990). The limit of detection (LOD) was 0.29 ng/mL at a signal-to-noise ratio of 3. This procedure presented was successfully applied to determine riboflavin in 18 samples of 9 types of cereal grains. The recovery rat...
- Published
- 2013
21. Synthesis of MgMnSiO4 and Its Application as Cathode Material for Magnesium Battery
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Zhen Jiang and Jianzhi Sun
- Subjects
Battery (electricity) ,Materials science ,Renewable Energy, Sustainability and the Environment ,Magnesium ,Discharge current ,chemistry.chemical_element ,Electrochemistry ,Magnesium battery ,chemistry.chemical_compound ,chemistry ,Chemical engineering ,Cathode material ,General Materials Science ,Orthorhombic crystal system ,Orthosilicate - Abstract
Orthosilicate MgMnSiO4 was prepared by sol-gel route and a subsequent heating procedure as a cathode material for rechargeable magnesium batteries. XRD patterns showed that MgMnSiO4 has a orthorhombic system with space group Pbnm(62). MgMnSiO4 presents good electrochemical behaviors at 10 mAg-1 discharge current density with specific capacity 130.1 mAhg-1 after 20 cycles. The results show that MgMnSiO4 could be a potential cathode material for high-energy magnesium secondary battery.
- Published
- 2014
22. The interaction processes of the N-soliton solutions for an extended generalization of Vakhnenko equation
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Jianzhi Sun, Yu-Lan Ma, and Bang-Qing Li
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Computational Mathematics ,Nonlinear Sciences::Exactly Solvable and Integrable Systems ,Generalization ,Applied Mathematics ,Numerical analysis ,Mathematical analysis ,Applied mathematics ,Variable transformation ,Soliton ,Nonlinear Sciences::Pattern Formation and Solitons ,Mathematics ,Variable (mathematics) - Abstract
The N-soliton solutions for an extended generalization of Vakhnenko equation are calculated by applying the improved Hirota method and the variable transformations. The N-soliton solutions can be expressed explicitly. Furthermore, the interaction processes are discussed for the N-soliton solutions.
- Published
- 2010
23. MEK1-independent activation of MAPK and MEK1-dependent activation of p70 S6 kinase by stem cell factor (SCF) in ovarian cancer cells
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Xiaoning Zhang, Xin Zhang, Chao Du, Chunhong Ma, Jianzhi Sun, Lian Liu, Li Li, Xiuwen Wang, Di Zhao, and Nan Hou
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MAPK/ERK pathway ,Rex1 ,MAP Kinase Kinase 1 ,Biophysics ,Cell Growth Process ,Stem cell factor ,Biology ,environment and public health ,Biochemistry ,Cancer stem cell ,Cell Line, Tumor ,medicine ,Humans ,Molecular Biology ,Cell Proliferation ,Mitogen-Activated Protein Kinase Kinases ,Ovarian Neoplasms ,Stem Cell Factor ,Cell growth ,Ribosomal Protein S6 Kinases, 70-kDa ,Cell Biology ,medicine.disease ,Cell biology ,Enzyme Activation ,Gene Knockdown Techniques ,embryonic structures ,Cancer research ,Female ,RNA Interference ,biological phenomena, cell phenomena, and immunity ,Stem cell ,Ovarian cancer - Abstract
We discovered a stem cell factor (SCF)-triggered, MEK1-independent, and PI3K-dependent MAPK activation pathway in the Kit-expressing ovarian cancer cell line HEY. When we knocked down MEK1 with RNA interference (RNAi) to study the function of MEK1 on the proliferation and survival of ovarian cancer cells, we found that impaired cell growth still occurred after MEK1 expression had been suppressed, although MAPK activation remained intact. This suggests that there is MEK1-independent activation of MAPK in the SCF-induced ovarian cancer cell growth process, and that MEK1 still plays a crucial role in maintaining the malignant properties of ovarian cancer cells even when it fails to activate MAPK as expected.
- Published
- 2009
24. Using k-Mix-Neighborhood Subdigraphs to Compute Canonical Labelings of Digraphs
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Li Tan, Jianzhi Sun, Jianqiang Hao, Yunzhan Gong, and Yawen Wang
- Subjects
0301 basic medicine ,k-mix-neighborhood subdigraph ,mix diffusion degree sequence ,adjacency matrix ,General Physics and Astronomy ,lcsh:Astrophysics ,02 engineering and technology ,entire mix diffusion degree sequences ,Combinatorics ,03 medical and health sciences ,lcsh:QB460-466 ,0202 electrical engineering, electronic engineering, information engineering ,canonical labeling ,algorithm ,Adjacency matrix ,lcsh:Science ,Complement graph ,Mathematics ,Discrete mathematics ,Digraph ,lcsh:QC1-999 ,Vertex (geometry) ,030104 developmental biology ,Software testing ,lcsh:Q ,020201 artificial intelligence & image processing ,U-1 ,lcsh:Physics - Abstract
This paper presents a novel theory and method to calculate the canonical labelings of digraphs whose definition is entirely different from the traditional definition of Nauty. It indicates the mutual relationships that exist between the canonical labeling of a digraph and the canonical labeling of its complement graph. It systematically examines the link between computing the canonical labeling of a digraph and the k-neighborhood and k-mix-neighborhood subdigraphs. To facilitate the presentation, it introduces several concepts including mix diffusion outdegree sequence and entire mix diffusion outdegree sequences. For each node in a digraph G, it assigns an attribute m_NearestNode to enhance the accuracy of calculating canonical labeling. The four theorems proved here demonstrate how to determine the first nodes added into M a x Q ( G ) . Further, the other two theorems stated below deal with identifying the second nodes added into M a x Q ( G ) . When computing C m a x ( G ) , if M a x Q ( G ) already contains the first i vertices u 1 , u 2 , ⋯ , u i , Diffusion Theorem provides a guideline on how to choose the subsequent node of M a x Q ( G ) . Besides, the Mix Diffusion Theorem shows that the selection of the ( i + 1 ) th vertex of M a x Q ( G ) for computing C m a x ( G ) is from the open mix-neighborhood subdigraph N + + ( Q ) of the nodes set Q = { u 1 , u 2 , ⋯ , u i } . It also offers two theorems to calculate the C m a x ( G ) of the disconnected digraphs. The four algorithms implemented in it illustrate how to calculate M a x Q ( G ) of a digraph. Through software testing, the correctness of our algorithms is preliminarily verified. Our method can be utilized to mine the frequent subdigraph. We also guess that if there exists a vertex v ∈ S + ( G ) satisfying conditions C m a x ( G − v ) ⩽ C m a x ( G − w ) for each w ∈ S + ( G ) ∧ w ≠ v , then u 1 = v for M a x Q ( G ) .
- Published
- 2017
25. Erratum to: CIP2A is overexpressed and involved in the pathogenesis of chronic myelocytic leukemia by interacting with breakpoint cluster region-Abelson leukemia virus
- Author
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Juandong Wang, Tao Huang, Jianzhi Sun, Yuan Yu, Zhifang Liu, Wenjuan Li, Jihui Jia, and Chunyan Chen
- Subjects
Cancer Research ,Oncology ,Hematology ,General Medicine - Published
- 2014
26. CIP2A is overexpressed and involved in the pathogenesis of chronic myelocytic leukemia by interacting with breakpoint cluster region-Abelson leukemia virus
- Author
-
Zhifang Liu, Jianzhi Sun, Wenjuan Li, Jihui Jia, Chunyan Chen, Yuan Yu, Juandong Wang, and Tao Huang
- Subjects
Adult ,Male ,Cancer Research ,Fusion Proteins, bcr-abl ,Apoptosis ,Protein tyrosine phosphatase ,Biology ,Autoantigens ,Piperazines ,Proto-Oncogene Proteins c-myc ,Young Adult ,Leukemia, Myelogenous, Chronic, BCR-ABL Positive ,hemic and lymphatic diseases ,medicine ,Humans ,neoplasms ,Aged ,Cell Proliferation ,Gene knockdown ,Gene Expression Regulation, Leukemic ,Intracellular Signaling Peptides and Proteins ,breakpoint cluster region ,Membrane Proteins ,Hematology ,General Medicine ,Abelson leukemia virus ,Middle Aged ,medicine.disease ,Molecular biology ,Leukemia ,Pyrimidines ,Imatinib mesylate ,Oncology ,Case-Control Studies ,Gene Knockdown Techniques ,Benzamides ,Imatinib Mesylate ,Female ,K562 Cells ,Tyrosine kinase ,K562 cells - Abstract
To detect the expression of cancerous inhibitor of phosphatase 2A (CIP2A) in chronic myelocytic leukemia (CML) and investigate the mechanism underlying CIP2A knockdown-mediated cell proliferation and apoptosis as well as the interaction of CIP2A with breakpoint cluster region-Abelson leukemia virus (BCR-ABL). CIP2A mRNA and protein expression in chronic myelocytic leukemia-chronic (CML-CP) patients and healthy controls were determined by RT-PCR and Western blot. In vivo, c-Myc expression, PP2A activity, cell proliferation, and apoptosis of CML cells were detected with CIP2A depletion. In addition, the relationship among CIP2A, BCR-ABL, and tyrosine phosphatase SHP-1 was explored by depleting/overexpressing CIP2A or inhibiting BCR-ABL. The level of CIP2A mRNA was higher in CML-CP patients than healthy controls (56/74, 75.7 % vs. 1/35, 2.9 %, P < 0.001), and CIP2A protein was overexpressed in corresponding specimens. CIP2A knockdown by siRNA reduced the level of c-Myc protein and clonogenic formation, inhibited the activity of PP2A, K562 cell proliferation, and promoted cell apoptosis. Suppressing BCR-ABL by imatinib mesylate (IM) significantly decreased CIP2A expression. CIP2A knockdown decreased BCR-ABL but increased SHP-1 expression, and CIP2A overexpression had the reverse effect. CIP2A is overexpressed in CML-CP patients, and its expression may promote CML pathogenesis. CIP2A and BCR-ABL can regulate each other in a positive feedback loop. CIP2A may be a useful therapeutic target in CML-CP, particularly in patients with IM resistance. However, further studies are needed to validate the interaction between CIP2A and BCR-ABL using other tyrosine kinase inhibitors than IM.
- Published
- 2014
27. Determination of phthalic acid esters in Chinese white spirit using dispersive liquid-liquid microextraction coupled with sweeping β-cyclodextrin-modified micellar electrokinetic chromatography
- Author
-
Jianzhi, Sun, Hui, He, and Shuhui, Liu
- Subjects
Beverages ,Liquid Phase Microextraction ,Phthalic Acids ,Esters ,Food Contamination ,Electrokymography - Abstract
A simple method that consumes low organic solvent is proposed for the analysis of phthalic acid esters in Chinese white spirit using dispersive liquid-liquid microextraction coupled with sweeping-micellar electrokinetic chromatography. Tetrachloromethane and white-spirit-containing ethanol were used as the extraction and dispersing solvents, respectively. The electrophoresis separation buffer was composed of 5 mM β-cyclodextrin, 50 mM sodium dodecyl sulfate and 25 mM borate buffer (pH 9.2) with 9% acetonitrile, enabling the baseline resolution of the analytes within 13 min. Under the optimum conditions, satisfactory linearities (5-1000 ng/mL, r ≥ 0.9909), good reproducibility (RSD ≤ 6.7% for peak area, and RSD ≤ 2.8% for migration time), low detection limits (0.4-0.8 ng/mL) and acceptable recovery rates (89.6-105.7%) were obtained. The proposed method was successfully applied to 22 Chinese white spirits, and the content of dibutyl phthalate in 55% of the samples exceeded the Specific Migration Limit of 0.3 mg/kg established by the domestic and international regulations.
- Published
- 2014
28. Development and comparison of two dispersive liquid-liquid microextraction techniques coupled to high performance liquid chromatography for the rapid analysis of bisphenol A in edible oils
- Author
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Hui He, Jianzhi Sun, Xiaoke Zhang, Shuhui Liu, Jie Chen, and Qilong Xie
- Subjects
Detection limit ,Bisphenol A ,Analyte ,Chromatography ,Liquid Phase Microextraction ,Organic Chemistry ,Extraction (chemistry) ,Analytical chemistry ,Food Contamination ,General Medicine ,Repeatability ,Biochemistry ,High-performance liquid chromatography ,Analytical Chemistry ,chemistry.chemical_compound ,chemistry ,Phenols ,Sodium hydroxide ,Limit of Detection ,Plant Oils ,Methanol ,Benzhydryl Compounds ,Chromatography, High Pressure Liquid - Abstract
In this study, two novel sample extraction methods for the analysis of bisphenol A (BPA) in edible oils were developed by using liquid–liquid extraction followed by a dispersive liquid–liquid microextraction (LLE-DLLME) and reversed-phase dispersive liquid–liquid microextraction (RP-DLLME). RP-DLLME showed a superior characteristic over LLE-DLLME and other previously reported procedures because of its easy operation, short extraction time, high sensitivity, low organic solvent consumption and waste generation. The optimized extraction conditions of RP-DLLME for 1.0 g of edible oil diluted in 4 mL of n-hexane were: extractant, 100 μL 0.2 M sodium hydroxide solution (80% methanol, v/v); extraction time, 1 min; centrifugation, 3 min. The determination of BPA was carried out by high performance liquid chromatography coupled with a DAD detector. The method offered excellent linearity over a range of 0.010–0.5 μg g −1 with a correlation coefficient of r > 0.997. Intra-day and inter-day repeatability values expressed as relative standard deviation were 1.9% and 5.9%, respectively. The quantitation limit and detection limit were 6.3 and 2.5 ng g −1 . The target analyte was detected in 5 out of 16 edible oil samples. The recovery rates in real samples ranged from 89.5 to 99.7%.
- Published
- 2013
29. Research on Scheduling Algorithm Based on Genetic Algorithm for Grid Tasks
- Author
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Yuehui Li, Jianzhi Sun, Hongzhi Liu, Jianqiang Hao, and Wenyue Zhang
- Subjects
Rate-monotonic scheduling ,Mathematical optimization ,Theoretical computer science ,Grid computing ,Computer science ,Two-level scheduling ,Algorithm design ,Dynamic priority scheduling ,Grid ,computer.software_genre ,computer ,Fair-share scheduling ,Scheduling (computing) - Abstract
In this paper, we present basic notions and relevant results in the area of grid scheduling. The current approaches of GA have little weaknesses when it was used in grid scheduling. We introduce mathematical model of grid scheduling and give a detailed GA method by using the "pattern theory" and "building block hypothesis" technologies. This modified method can decrease the randomicity of the current GA. And we use the MGA method to study grid-scheduling problems and find a necessary and sufficient design method. At last, we analyze the laboratory result to show that the modified algorithm has better characteristics than the standard GA when it was used in grid task scheduling.
- Published
- 2010
30. Highly selective hydrodechlorination of CCl4 into CHCl3 on Ag–Pd/carbon catalysts
- Author
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Mingshi Li, Jianjun Zhu, Yuhua Shan, Mohong Lu, Dongbao Zhang, and Jianzhi Sun
- Subjects
Chloroform ,Inorganic chemistry ,Alloy ,chemistry.chemical_element ,engineering.material ,Catalysis ,chemistry.chemical_compound ,Adsorption ,chemistry ,X-ray photoelectron spectroscopy ,Carbon tetrachloride ,engineering ,Physical and Theoretical Chemistry ,Selectivity ,Carbon - Abstract
A series of Ag–Pd/C catalysts with different Ag/Pd molar ratios were prepared by impregnation and characterized by N2 adsorption and XPS. The catalytic performance was investigated in the hydrodechlorination of carbon tetrachloride into chloroform. High selectivity toward chloroform, near 100%, was obtained over Ag–Pd/C bi-metal catalysts. A very pronounced surface enrichment with Ag in Ag–Pd/C catalysts determined by XPS may be responsible for the high selectivity of chloroform. It is suggested that hydrodechlorination of carbon tetrachloride into chloroform occurs on the surface of Ag in the Ag–Pd alloy and the role of Pd is to supply H atoms necessary.
- Published
- 2010
31. Effectively and efficiently detect web page duplication
- Author
-
Zhongming Han, Qian Mo, Jianzhi Sun, and Hongzhi Liu
- Subjects
Information retrieval ,Text mining ,Similarity (network science) ,business.industry ,Computer science ,Web page ,The Internet ,Static web page ,Data mining ,business ,computer.software_genre ,computer ,Statistic - Abstract
There are a lot of redundant web pages on Internet. Based on tag statistic and text similarity comparison, we present a novel multilayer framework for detecting duplicated web pages in this paper. We propose two similarity text paragraphs detection algorithms and implement our framework. The experimental results show that our approach achieves high performance, which means that duplicated web pages can be efficiently detected simply by tag statistic and text comparison.
- Published
- 2009
32. A novel web page duplication detection framework
- Author
-
Zhongming Han, Dagao Duan, Hongzhi Liu, and Jianzhi Sun
- Subjects
Text mining ,Information retrieval ,Similarity (network science) ,business.industry ,Computer science ,Web page ,The Internet ,Data mining ,business ,computer.software_genre ,Cluster analysis ,computer ,Statistic - Abstract
There are a lot of redundant web pages on Internet. Based on tag statistic and text similarity comparison, we present a novel multilayer framework for detecting duplicated web pages in this paper. We propose two similarity text paragraphs detection algorithms and implement our framework. The experimental results show that our approach achieves high performance, which means that duplicated web pages can be efficiently detected simply by tag statistic and text comparison.
- Published
- 2009
33. Global Exponential Periodicity and Stability of a Class of Impulsive Neural Networks with Finite Distributed Delays
- Author
-
Jianzhi Sun and Lechun Liu
- Subjects
Lyapunov function ,Class (set theory) ,symbols.namesake ,Exponential stability ,Artificial neural network ,Differential equation ,Control theory ,symbols ,Stability (probability) ,Exponential function ,Mathematics - Abstract
By constructing proper Lyapunov function and using some analysis techniques in the impulsive differential equation theory. A sufficient condition which ensures the global exponential periodicity and stability of neural networks with impulses and finite distributed delays is obtained. The obtained results in this paper improve and extend those given in the earlier literature.
- Published
- 2008
34. Global Exponential Stability of a Class of Neural Networks with Finite Distributed Delays
- Author
-
Jianzhi Sun and Huaiqin Wu
- Subjects
Halanay inequality ,Class (set theory) ,Multidisciplinary ,Artificial neural network ,Exponential stability ,Control theory ,Differentiable function ,Stability (probability) ,Measure (mathematics) ,Mathematics - Abstract
In this paper, global exponential stability of a class of neural networks with finite distributed delays is investigated bymatrix measure technique and Halanay inequality. Several sufficient conditions are given to guarantee globalexponential stability of the neural networks without assuming the differentiability of delay. At last, two examples aregiven to illustrate the applicability of our results.
- Published
- 2007
35. Constitutional Robertsonian translocations in (9;22)-positive chronic myelogenous leukemia
- Author
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Yafang Wu, Jinlan Pan, Li Yao, Wei Wang, Yongquan Xue, Yu Guo, Jianzhi Sun, and Jun Qian
- Subjects
Cancer Research ,Genetics ,medicine ,Cancer research ,Chromosomal translocation ,Biology ,medicine.disease ,Molecular Biology ,Chronic myelogenous leukemia - Published
- 2002
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