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5,295 results on '"CHEN Xiu"'

1. A rapid identification method for adulteration of microcrystalline cellulose

Author

CHEN Xiu-ming, LIANG Hao-xin, HUANG Wei-qiang, XI Xing-lin, LI Shuang, and ZHANG Jia-jun

Subjects
microcrystalline cellulose, the adulteration, rapidly, identification, Food processing and manufacture, TP368-456, Nutrition. Foods and food supply, TX341-641
Abstract

A rapid identification method of microcrystalline cellulose adulteration by near infrared spectroscopy was studied. Based on the near-infrared spectrum data of microcrystalline cellulose samples and adulterants (soluble starch, wheat flour), the material spectrum database and the adulterant spectrum database were created respectively, and the microcrystalline cellulose classification and the adulterant models were also established. A rapid identification method for microcrystalline cellulose adulteration was established by using the Adulterant Screen algorithm technology for calculation and analysis. The minimum detected content of single component adulteration of microcrystalline fiber powder was 2% soluble starch and 1% wheat flour, and the accurate recognition rate was 100%. When the adulteration of two components (soluble starch + wheat flour) was two to ten times of the detection limit concentration of one component, the accurate recognition rate was 100%. The accurate recognition rate of unknown sample microcrystalline cellulose above the detection limit is 100%. The method is simple, rapid and reliable, and can quickly identify adulteration of microcrystalline cellulose samples. It can be effectively applied to the adulteration detection and identification of daily microcrystalline cellulose samples, which could provide technical support for the customs to crack down on tax evasion and evasion.

Published
2023
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3. Development of a questionnaire assessing nursing staff’s knowledge, attitude, and practice on the prevention of the nosocomial infection in elderly patients: testing reliability and validity†

Author

Cai Fu-Lin, Chen Xiu-Feng, and Wang Yong-Xin

Subjects
nurse, delphi method, elderly patient, nosocomial infection, questionnaire, Nursing, RT1-120
Abstract

To develop a questionnaire assessing nursing staff’s knowledge, attitude, and practice on the prevention of the nosocomial infection in elderly patients and test its reliability and validity.

Published
2021
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4. Failure mechanism of stitched three dimension woven composite/Ti alloy hybrid board joint under shear load

Author

LU Yi-rong, ZHENG Hua-yong, CHEN Xiu-hua, and WANG Hai

Subjects
three-dimension woven composite/ti alloy hybrid, stitching single-lap connect, shear pro-perty, in-situ test, failure mechanism, Materials of engineering and construction. Mechanics of materials, TA401-492
Abstract

In order to study the effect of stitching density, tow size of the suture and diameter of the stitching hole on the shear property of the stitched three-dimensional woven composite/titanium hybrid board stitching connection structure, seven groups of samples with different stitching densities, tow size of the suture and diameter of the stitching hole were tested. A reference group whose samples were unstitched was also tested to show the effect of stitching on the joint. Different failure modes of the lap zone with different stitching parameters were observed in in-situ meso-experiment, and the damage morphologies of the characteristic points on the load-displacement curve were given. The result shows that increasing tow size of the suture and increasing stitching density can both increase the failure load of the hybrid joint. Increasing the stitching density is proved more effective in improving the failure load. Doubling the stitching density can increase the failure load of the stitched joint about 82.0%. Doubling the tow size of the suture can only increase the failure load of the joint about 24.3%; Whether the diameter of the stitching hole is 2 mm or 4 mm do not influence the bearing capacity of the structure obviously, and when the stitching hole diameter reaches 6 mm, the bearing capacity is reduced due to the low strength of the epoxy resin in the gap between stitching hole and suture. It is dangerous to increase diameter of stitching hole above 4 mm; the shear failure of the stitched three-dimension woven composite/titanium alloy hybrid structure is observed by mesoscopic mechanical test. Composite/titanium alloy interface failure, crack initiation and extension in composite or in lap zone and failure of the lap zone are the three main stages of the structure failure observed in the test; The suture failure in the connect zone includes suture pull out and suture cut off. There are three failure modes of the lap zone observed in test. In suture cut off mode, all sutures in lap zone are cut off. The position at which the suture is cut is related to the diameter of the stitching hole. In suture cut off/pull out mixed mode, some of the interface between suture and three-dimension woven composites fail and the suture is partly or completely pull out. In the group with high stitching density, sutures near the end of the three-dimension woven composite crush the composite and extrude out of the composite. Stitching density is the major factor in the failure mode of the joint.

Published
2020
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5. Optically Detected Magnetic Resonance of Nitrogen-Vacancy Centers in Diamond under Weak Laser Excitation

Author

Yu, Yong-Hong, Zhang, Rui-Zhi, Xu, Yue, Chen, Xiu-Qi, Zheng, Huijie, Li, Quan, Liu, Ren-Bao, Pan, Xin-Yu, Budker, Dmitry, and Liu, Gang-Qin

Subjects
Quantum Physics
Abstract

As promising quantum sensors, nitrogen-vacancy (NV) centers in diamond have been widely used in frontier studies in condensed matter physics, material sciences, and life sciences. In practical applications, weak laser excitation is favorable as it reduces the side effects of laser irradiation, for example, phototoxicity and heating. Here we report a combined theoretical and experimental study of optically detected magnetic resonance (ODMR) of NV-center ensembles under weak 532-nm laser excitation. In this regime, both the width and splitting of ODMR spectra decrease with increasing laser power. This power dependence is reproduced with a model considering laser-induced charge neutralization of NV--N+ pairs, which alters the local electric field environment. These results are important for understanding and designing NV-based quantum sensing in light-sensitive applications.

Published
2023

22. Optimization of multi-sandwich-panel composite structures for minimum weight with strength and buckling considerations

Author

Fan Hai-Tao, Wang Hai, and Chen Xiu-Hua

Subjects
buckling, composite structure, genetic algorithm, optimization, sandwich panel, Materials of engineering and construction. Mechanics of materials, TA401-492
Abstract

A genetic algorithm-based method is proposed to globally optimize the stacking sequence of multi-sandwich-panel composite structures for minimum weight with strength and buckling considerations. The prerequisites for the continuity between sandwich panels are first studied. To implement the summarized continuity rules in the evolutionary optimization, three newly constructed chromosomes are developed to encode the global stacking sequence with no additional repair. Genetic operators, including specialized mutation, swapping and crossover operators, are also developed to effectively explore the design space and keep the continuity rules followed. The Hashin criterion and maximum stress criterion are used to evaluate the strength of sandwich panels. A typical multi-sandwich-panel composite structure with identical and different core thicknesses is optimized to verify the validity and efficiency of the proposed method. It is found that much lighter solutions are obtained with an acceptable efficiency in all cases. It is also found that the weight of the multi-sandwich-panel composite structures can be further reduced when the core thicknesses are not identical.

Published
2018
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23. A Feasible Semi-quantum Private Comparison Based on Entanglement Swapping of Bell States

Author

Ye, Chong-Qiang, Li, Jian, Chen, Xiu-Bo, and Hou, Yanyan

Subjects
Quantum Physics
Abstract

Semi-quantum private comparison (SQPC) enables two classical users with limited quantum capabilities to compare confidential information using a semi-honest third party (TP) with full quantum power. However, entanglement swapping, as an important property of quantum mechanics in previously proposed SQPC protocols is usually neglected. In this paper, we propose a feasible SQPC protocol based on the entanglement swapping of Bell states, where two classical users do not require additional implementation of the semi-quantum key distribution protocol to ensure the security of their private data. Security analysis shows that our protocol is resilient to both external and internal attacks. To verify the feasibility and correctness of the proposed SQPC protocol, we design and simulate the corresponding quantum circuits using IBM Qiskit. Finally, we compare and discuss the proposed protocol with previous similar work. The results reveal that our protocol maintains high qubit efficiency, even when entanglement swapping is employed. Consequently, our proposed approach showcases the potential applications of entanglement swapping in the field of semi-quantum cryptography., Comment: 17 pages, 6 figures. arXiv admin note: text overlap with arXiv:2210.03421

Published
2023
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24. Quantum adversarial metric learning model based on triplet loss function

Author

Hou, Yan-Yan, Li, Jian, Chen, Xiu-Bo, and Ye, Chong-Qiang

Subjects
Quantum Physics
Abstract

Metric learning plays an essential role in image analysis and classification, and it has attracted more and more attention. In this paper, we propose a quantum adversarial metric learning (QAML) model based on the triplet loss function, where samples are embedded into the high-dimensional Hilbert space and the optimal metric is obtained by minimizing the triplet loss function. The QAML model employs entanglement and interference to build superposition states for triplet samples so that only one parameterized quantum circuit is needed to calculate sample distances, which reduces the demand for quantum resources. Considering the QAML model is fragile to adversarial attacks, an adversarial sample generation strategy is designed based on the quantum gradient ascent method, effectively improving the robustness against the functional adversarial attack. Simulation results show that the QAML model can effectively distinguish samples of MNIST and Iris datasets and has higher robustness accuracy over the general quantum metric learning. The QAML model is a fundamental research problem of machine learning. As a subroutine of classification and clustering tasks, the QAML model opens an avenue for exploring quantum advantages in machine learning., Comment: arXiv admin note: substantial text overlap with arXiv:2303.07906

Published
2023

25. A hybrid quantum-classical classifier based on branching multi-scale entanglement renormalization ansatz

Author

Hou, Yan-Yan, Li, Jian, Chen, Xiu-Bo, and Ye, Chong-Qiang

Subjects
Quantum Physics
Abstract

Label propagation is an essential semi-supervised learning method based on graphs, which has a broad spectrum of applications in pattern recognition and data mining. This paper proposes a quantum semi-supervised classifier based on label propagation. Considering the difficulty of graph construction, we develop a variational quantum label propagation (VQLP) method. In this method, a locally parameterized quantum circuit is created to reduce the parameters required in the optimization. Furthermore, we design a quantum semi-supervised binary classifier based on hybrid Bell and $Z$ bases measurement, which has shallower circuit depth and is more suitable for implementation on near-term quantum devices. We demonstrate the performance of the quantum semi-supervised classifier on the Iris data set, and the simulation results show that the quantum semi-supervised classifier has higher classification accuracy than the swap test classifier. This work opens a new path to quantum machine learning based on graphs.

Published
2023

26. Crystal structure of 2,3-dichloro-6-methoxyquinoxaline, C9H6Cl2N2O

Author

Yang Zhi-Hai, Guo Zi-Yin, Shao Jia-Xin, Peng Shi-Yong, Zhu Zhong-Zhi, and Chen Xiu-Wen

Subjects
1907580, Physics, QC1-999, Crystallography, QD901-999
Abstract

C9H6Cl2N2O, monoclinic, P21/n (no. 14), a = 15.597(6) Å, b = 3.9346(16) Å, c = 15.614(6) Å, β = 101.834(4)°, V = 937.8(6) Å3, Z = 4, Rgt(F) = 0.0360, wRref(F2) = 0.1019, T = 296(2) K.

Published
2019
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29. DMSOP-cleaving enzymes are diverse and widely distributed in marine microorganisms

Author

Carrión, Ornella, Li, Chun-Yang, Peng, Ming, Wang, Jinyan, Pohnert, Georg, Azizah, Muhaiminatul, Zhu, Xiao-Yu, Curson, Andrew R. J., Wang, Qing, Walsham, Keanu S., Zhang, Xiao-Hua, Monaco, Serena, Harvey, James M., Chen, Xiu-Lan, Gao, Chao, Wang, Ning, Wang, Xiu-Juan, Wang, Peng, Giovanonni, Stephen J., Lee, Chih-Ping, Suffridge, Christopher P., Zhang, Yu, Luo, Ziqi, Wang, Dazhi, Todd, Jonathan D., and Zhang, Yu-Zhong

Published
2023
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41. Effect of dexmedetomidine infusion on post-operative sleep disturbances in women with breast cancer: A monocentric randomized-controlled double-blind trial

Author

Dong, Yu-Shan, primary, Wang, Mao-San, additional, Li, Wen-Zhan, additional, Zhao, Kai, additional, Cui, Xiao-Jie, additional, Yang, Yan-Ming, additional, Geng, Xing-Yu, additional, Pu, Yu-Tian, additional, Hu, Zi-Wei, additional, Fang, Can, additional, Lv, Gao-Chao, additional, Liu, Su, additional, and Chen, Xiu-Xia, additional

Published
2024
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45. Mycolicibacterium arseniciresistens sp. nov., isolated from lead–zinc mine tailing, and reclassification of two Mycobacterium species as Mycolicibacterium palauense comb. nov. and Mycolicibacterium grossiae comb. nov.

Author

Zhu, Guo-Xing, primary, Chen, Xiu, additional, Wu, Ya-Jie, additional, Wang, Hai-Long, additional, Lu, Chun-Mei, additional, Wang, Xiao-Ming, additional, Zhang, Yue, additional, Liu, Zi-Chao, additional, He, Jiang-Bo, additional, Tang, Shu-Kun, additional, and Cao, Yan-Ru, additional

Published
2024
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