Search

Your search keyword '"Wang, Minchang"' showing total 47 results
Start Over Author "Wang, Minchang"
47 results on '"Wang, Minchang"'

13. Data-driven Methods to Predict the Burst Strength of Corroded Line Pipelines Subjected to Internal Pressure

Author

Cai, Jie (author), Jiang, X. (author), Yang, Yazhou (author), Lodewijks, Gabriel (author), Wang, Minchang (author), Cai, Jie (author), Jiang, X. (author), Yang, Yazhou (author), Lodewijks, Gabriel (author), and Wang, Minchang (author)

Abstract

A corrosion defect is recognized as one of the most severe phenomena for high-pressure pipelines, especially those served for a long time. Finite-element method and empirical formulas are thereby used for the strength prediction of such pipes with corrosion. However, it is time-consuming for finite-element method and there is a limited application range by using empirical formulas. In order to improve the prediction of strength, this paper investigates the burst pressure of line pipelines with a single corrosion defect subjected to internal pressure based on data-driven methods. Three supervised ML (machine learning) algorithms, including the ANN (artificial neural network), the SVM (support vector machine) and the LR (linear regression), are deployed to train models based on experimental data. Data analysis is first conducted to determine proper pipe features for training. Hyperparameter tuning to control the learning process is then performed to fit the best strength models for corroded pipelines. Among all the proposed data-driven models, the ANN model with three neural layers has the highest training accuracy, but also presents the largest variance. The SVM model provides both high training accuracy and high validation accuracy. The LR model has the best performance in terms of generalization ability. These models can be served as surrogate models by transfer learning with new coming data in future research, facilitating a sustainable and intelligent decision-making of corroded pipelines., Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public., Transport Engineering and Logistics

Published
2022
Full Text
View/download PDF

18. 温度诱导CL-20相变的太赫兹光谱特性

Author

He Xiangyang, 何向阳, primary, Zhang Qi, 张祺, additional, Wang Minchang, 王民昌, additional, Liu Quancheng, 刘泉澄, additional, Liu Ke, 刘可, additional, Li Guilin, 李桂琳, additional, Kang Ying, 康莹, additional, Deng Hu, 邓琥, additional, and Shang Liping, 尚丽平, additional

Published
2022
Full Text
View/download PDF

23. 温度诱导CL-20相变的太赫兹光谱特性

Author

何向阳 He Xiangyang, 张祺 Zhang Qi, 王民昌 Wang Minchang, 刘泉澄 Liu Quancheng, 刘可 Liu Ke, 李桂琳 Li Guilin, 康莹 Kang Ying, 邓琥 Deng Hu, and 尚丽平 Shang Liping

Subjects
Space and Planetary Science, Aerospace Engineering, Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics
Published
2022

26. Fast Formation of Silicon Nanopore Array by Low-Dose Focused Ion Beam Raster Scanning Guided Anodization

Author

Qin Song, Jiao Jiwei, Wang Minchang, Ge Dao-Han, and Wang Jingjie

Subjects
Materials science, Silicon, Anodizing, 010401 analytical chemistry, Low dose, Biomedical Engineering, chemistry.chemical_element, Bioengineering, Nanotechnology, 02 engineering and technology, General Chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, Focused ion beam, 0104 chemical sciences, Nanopore, chemistry, General Materials Science, 0210 nano-technology, Raster scan
Published
2016

27. Determination of the component mass ratio and moisture in BTTN/NG nitrate ester mixture simultaneously by qNMR and method validation

Author

Zhang Lihan, Xu Min, Chang Hai, Liu Ke, Zihui Meng, Chen Zhiqun, Wang Minchang, and Zhang Gao

Subjects
Solvent, chemistry.chemical_compound, Chromatography, chemistry, Moisture, Subtraction method, Component (thermodynamics), Nitrate ester, Mass ratio, Water content, Spectroscopy, Analytical Chemistry
Abstract

The component mass ratio and moisture of nitrate ester mixtures are crucial technical indicators for the industrial applications and safety performance evaluation. Thus an accurate, fast and simple 1H quantitative nuclear magnetic resonance (qNMR) method was developed for the determination of the component mass ratio and moisture of butanetriol trinitrate (BTTN) and nitroglycerin (NG) nitrate ester mixture simultaneously. By using the NMR ERETIC module technique, the effect of water in solvent and internal standard was eliminated by integral value subtraction method, and the moisture content in BTTN/NG nitrate ester mixture can be accurately calculated. The method enables the determination of component mass ratio and moisture in 10 min of analysis with great linearity (r2≥0.999), high precision (RSD

Published
2020

30. Fabrication of a Novel Micro-Nano-Hybrid Porous Silicon Array for Photonic Crystal Application

Author

Wenjun Liu, Jiwei Jiao, Wang Minchang, and Daohan Ge

Subjects
Fabrication, Materials science, Biocompatibility, Micro nano, Hybrid computer, Nanotechnology, Dielectric, Porous silicon, Photonic crystal, Photonic bandgap
Abstract

PC as a micro-structured material with dielectric constant varying periodically in space, gives us a possibility to successfully control photons and will play an important role in the future optoelectronic fields [1]. One of the most important and useful properties of PCs is the photonic band gap (PBG). Among various methods for the fabrication of PBG structures, porous silicon based technique [2] has received great attention due to its advantages of high surface-area-to-volume ration, low cost, and biocompatibility. Intensive efforts have been made to fabricate PCs based on ordered porous silicon arrays. However, the hybrid porous silicon array based PC structure, which can monolithically integrate microand nano-pores, has not been well studied to date. Such hybrid PC structures are expected to offer some attractive features such as tunable photonic bandgap.

Published
2013

31. Formation of macro–meso–microporous multilayer structures

Author

J.W. Jiao, Wang Minchang, Daohan Ge, P.L. Yan, Shuang-Jiao Qin, and Weiqing Liu

Subjects
Materials science, Fabrication, Macropore, Silicon, Anodizing, General Chemical Engineering, chemistry.chemical_element, Nanotechnology, Electrolyte, Microporous material, Substrate (electronics), Chemical engineering, chemistry, Electrochemistry, Mesoporous material
Abstract

In this study, we present a novel electrochemical technique for the fabrication of macro–meso–microporous multilayer structures. Based on systematic investigation of HF/H2O2/ethanol electrolyte system, all three types of pores (smooth macropores, branched mesopores and spongy micropores) can be produced respectively on highly-doped n-type silicon substrate by varying the applied current density, which determines the pore sizes and morphologies. By applying a multi-step current modulation during anodization, a multilayer consisting of three different pore morphologies (macro-, meso-, and micro-pores), as well as several types of multilayer structures with two different pore morphologies, was fabricated on the same silicon substrate using the same electrolyte. A wide range of porosities (30–82%) can be easily achieved with this approach. The current-burst-model is employed to interpret the mechanism concerning such three types of pores formation.

Published
2013

38. Chemical Constituents of the Root of Jasminum giraldii

Author

Yue, Zhenggang, primary, Qin, Hui, additional, Li, Yuhua, additional, Sun, Yang, additional, Wang, Zhipeng, additional, Yang, Tiehong, additional, Liu, Li, additional, Wang, Minchang, additional, Feng, Feng, additional, and Mei, Qibing, additional

Published
2013
Full Text
View/download PDF

41. Enhanced Suppression of the Formation of Porous Silicon Based on Secondary Knocked-On effect in FIB

Author

Daohan Ge, Jiwei Jiao, Wang Minchang, Jiaqiang Xu, Jingjie Wang, and Wenjun Liu

Subjects
Materials science, Nanotechnology, Porous silicon
Abstract

In this paper, we report a novel porous silicon (PSi) process to realize controllable micro-to-nano scale features after FIB treatment. It is interested to notice that a “shielding area”, where the etching is enhancedly suppressed, exists around the patterns treated by FIB. This shielding area is ascribed to the secondary knocked-on effect during the FIB process. The diameter of shielding area has positive correlation to the voltage used in the FIB step. Also, the diameter of shielding area decreases when the resistivity of the silicon substrate declines. We achieved a shielding area with width of approximately 4μm on PSi. Typically, a circular feature of PSi with a diameter as large as 10μm is demonstrated for the first time, inside of which dramatically no pore appears at all while outside shielding area remains.

Published
2012

46. Enhanced Suppression of the Formation of Porous Silicon Based on Secondary Knocked-On Effect in FIB

Author

Wang, Jingjie, Jiao, Jiwei, Ge, Daohan, Wang, Minchang, Liu, Wenjun, and Xu, Jiaqiang

Abstract

In this paper, we report a novel porous silicon (PSi) process to realize controllable micro-to-nano scale features after FIB treatment. It is interested to notice that a "shielding area", where the etching is enhancedly suppressed, exists around the patterns treated by FIB. This shielding area is ascribed to the secondary knocked-on effect during the FIB process. The diameter of shielding area has positive correlation to the voltage used in the FIB step. Also, the diameter of shielding area decreases when the resistivity of the silicon substrate declines. We achieved a shielding area with width of approximately 4um on PSi. Typically, a circular feature of PSi with a diameter as large as 10um is demonstrated for the first time, inside of which dramatically no pore appears at all while outside shielding area remains.

Published
2013

47. Improved therapeutic effect of DOX-PLGA-PEG micelles decorated with bivalent fragment HAb18 F(ab')(2) for hepatocellular carcinoma.

Author

Jin C, Qian N, Zhao W, Yang W, Bai L, Wu H, Wang M, Song W, and Dou K

Subjects
Animals, Antibiotics, Antineoplastic chemistry, Cell Line, Tumor, Cell Proliferation drug effects, Doxorubicin chemistry, Drug Carriers, Drug Delivery Systems, Flow Cytometry, Humans, Immunoconjugates chemistry, Immunoglobulin Fab Fragments therapeutic use, Liver Neoplasms drug therapy, Male, Mice, Mice, Inbred BALB C, Mice, Nude, Polylactic Acid-Polyglycolic Acid Copolymer, Polymers chemical synthesis, Polymers chemistry, Polymers therapeutic use, Xenograft Model Antitumor Assays, Antibiotics, Antineoplastic therapeutic use, Antibodies, Monoclonal therapeutic use, Carcinoma, Hepatocellular drug therapy, Doxorubicin therapeutic use, Lactic Acid chemistry, Micelles, Polyethylene Glycols chemistry, Polyglycolic Acid chemistry
Abstract

Although surgery offers the only hope of cure for hepatocellular carcinoma (HCC), patients with inoperable or metastatic disease have a dismal prognosis. Therefore, there is an urgent need for new and effective treatment strategies. Polymeric micelles composed of drug conjugated to a diblock copolymer have attracted great interest for clinical administration of anticancer drugs. In this work, characteristics and cytotoxicity of doxorubicin-poly(d,l-lactic-co-glycolic acid)-poly(ethylene glycol) (DOX-PLGA-PEG) micelle and its targeted micelle decorated with bivalent fragment HAb18 F(ab')(2) for HCC were studied. These micelles possessed spherical morphology and higher loading efficiency. Cellular uptake and accumulation in tumor tissue of micelles was observed. The accumulation of the targeted micelles depends on dual effects of passive and active targeting. The drug-loading micelles showed cytotoxicity on tumor cells in vitro and in vivo. The targeted micelles resulted in significant improvement in therapeutic response. These results suggest that the novel micelles could be a promising candidate with excellent therapeutic efficacy for targeting the drugs to cancer cells.

Published
2010
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results