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Influence of multi-pass friction stir processing on microstructure and mechanical properties of 7B04-O Al alloy

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Transactions of Nonferrous Metals Society of China 2017年第4期27卷 789-796页

作者： Yu CHEN Hua DING Zhi-hui CAI Wen-jing YANG School of Materials Science and Engineering Northeastern University Shenyang 110819 China

Three-pass friction stir processing(FSP)with different moving distances of the stirring tool between the two successivepasses,50%diameter of the pin(traditional way)and50%diameter of the shoulder(novel way),was conducted on7B04-O Al *** result shows that an improvement in the mechanical properties of the processed zone is accomplished due to grain and secondphase particles *** hardness of the multi-pass FSP(M-FSP)sample is about HV40higher than that of the base *** the tensile strength of the M-FSP specimens is also significantly increased to about1.4times that of the base ***,theweak region of the processed zone is mainly dependent on the moving distance,where it is the previous pass stir zone in thetraditional way and the transitional zone in the novel *** the rotational speed narrows the weak region in the novel way,while it does not in the traditional way.

关键词： friction stir processing multi-pass grain refinement aluminum alloy

高效液相色谱法同时测定独活中七种有效成分含量及在质量评价中应用(英文)

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内蒙古大学学报（自然科学版） 2011年第2期42卷 215-223页

作者：常艳旭朱子微李晋张秋红秦绪文天津市现代中药重点实验室天津中医药大学天津300193

利用1.8μm颗粒的色谱柱建立了HPLC法同时测定独活中六种香豆素和一种倍半萜衍生物含量的分析方法.研究结果表明,七种有效成分在线性范围内线性关系良好,回收率在95.8-101.9%范围之内,最低检出限和定量限分别低于0.06和0.14μg/mL;化学... 详细信息

利用1.8μm颗粒的色谱柱建立了HPLC法同时测定独活中六种香豆素和一种倍半萜衍生物含量的分析方法.研究结果表明,七种有效成分在线性范围内线性关系良好,回收率在95.8-101.9%范围之内,最低检出限和定量限分别低于0.06和0.14μg/mL;化学计量学的方法(相似度分析和聚类分析)可用于评价不同来源的独活的质量.本项研究验证了多组分含量测定和化学计量学方法联用可用于独活药材的质量控制,为独活药材的质量评价提供了研究手段.

关键词：独活化学计量学高效液相色谱法

A Search for Solar Axions and Anomalous Neutrino Magnetic Moment with the Complete Panda X-Ⅱ Data

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chinese Physics Letters 2021年第1期38卷 30-34页

作者： Xiaopeng Zhou Xinning Zeng Xuyang Ning Abdusalam Abdukerim Wei Chen Xun Chen Yunhua Chen Chen Cheng Xiangyi Cui Yingjie Fan Deqing Fang Changbo Fu Mengting Fu Lisheng Geng Karl Giboni Linhui Gu Xuyuan Guo Ke Han Changda He Di Huang Yan Huang Yanlin Huang Zhou Huang Xiangdong Ji Yonglin Ju Shuaijie Li Huaxuan Liu Jianglai Liu Xiaoying Lu Wenbo Ma Yugang Ma Yajun Mao Yue Meng Kaixiang Ni Jinhua Ning Xiangxiang Ren Changsong Shang Guofang Shen Lin Si Andi Tan Anqing Wang Hongwei Wang Meng Wang Qiuhong Wang Siguang Wang Wei Wang Xiuli Wang Zhou Wang Mengmeng Wu Shiyong Wu Weihao Wu Jingkai Xia Mengjiao Xiao Pengwei Xie Binbin Yan Jijun Yang Yong Yang Chunxu Yu Jumin Yuan Ying Yuan Dan Zhang Tao Zhang Li Zhao Qibin Zheng Jifang Zhou Ning Zhou INPAC School of Physics and AstronomyShanghai Jiao Tong Universityand Shanghai Key Laboratory for Particle Physics and CosmologyShanghai 200240China School of Physics Beihang UniversityBeijing 100191China Shanghai Jiao Tong University Sichuan Research Institute Chengdu 610213China Yalong River Hydropower Development Company Ltd.288 Shuanglin RoadChengdu 610051China School of Physics Sun Yat-Sen UniversityGuangzhou 510275China Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghai 200240China School of Physics Nankai UniversityTianjin 300071China Key Laboratory of Nuclear Physics and Ion-Beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China School of Physics Peking UniversityBeijing 100871China International Research Center for Nuclei and Particles in the Cosmos&Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang UniversityBeijing 100191China School of Medical Instrument and Food Engineering University of Shanghai for Science and TechnologyShanghai 200093China Department of Physics University of MarylandCollege ParkMaryland 20742USA School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China School of Physics and Key Laboratory of Particle Physics and Particle Irradiation(MOE) Shandong UniversityJinan 250100China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201210China Center for High Energy Physics Peking UniversityBeijing 100871China

We report a search for new physics signals using the low energy electron recoil events in the complete data set from PandaX-Ⅱ,in light of the recent event excess reported by XENON1 *** data correspond to a total exposure of 100.7 ton·day with liquid *** robust estimates of the dominant background spectra,we perform sensitive searches on solar axions and neutrinos with enhanced magnetic *** is found that the axionelectron coupling gAe<4.6×10^(-12) for an axion mass less than 0.1 keV/c^(2) and the neutrino magnetic moment μv<4.9×10^(-11)μB at 90%confidence *** observed excess from XENON1 T is within our experimental constraints.

关键词： moment. excess estimates

Kinetic Parameters of Methane Generated from Source Rocks in the Kuqa Depression of Tarim Basin and Their Application

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Acta Geologica Sinica(English Edition) 2008年第1期82卷 154-163页

作者： LI Xianqing XIAO Xianming MI Jingkui TANG Yongchun XIAO Zhongyao LIU Dehan SHEN Jiagui YANG Yunfeng WANG Yan DONG Peng State Key Laboratory of Organic Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China State Key Laboratory of Coal Resources and Safe Mining China University of Mining and Technology Beijing 100083 China Research Center of Petroleum Energy and Environment California Institute of Technology 21910 Currier Rd Walnut CA 61769 USA Research Institute of Exploration and Development Tarim Oil Field Company PetroChina Korla Xinjiang 841000 China

In a thermal simulation experiment of gold tubes of closed-system, calculating with the KINETICS and GOR-ISOTOPE KINETICS software, kinetic parameters of gas generation and methane carbon isotopic fractionation from Triassic-Jurassic hydrocarbon source rocks in the Kuqa depression of Tarim Basin are obtained. The activation energies of methane generated from Jurassic coal, Jurassic mudstone and Triassic mudstone in the Kuqa Depression are 197-268 kJ/mol, 180-260 kJ/mol and 214-289 kJ/mol, respectively, and their frequency factors are 5.265×10^13 s^-1, 9.761×10^11 s^-1 and 2.270×10^14 s^-1. This reflects their differences of hydrocarbon generation behaviors. The kinetic parameters of methane carbon isotopic fractionation are also different in Jurassic coal, Jurassic mudstone and Triassic mudstone, whose average activation energies are 228 kJ/mol, 205 kJ/mol and 231 kJ/mol, respectively. Combined with the geological background, the origin of natural gas in the Yinan-2 gas pool is discussed, and an accumulation model of natural gas is thus established. The Yinan- 2 gas is primarily derived from Jurassic coal-bearing source rocks in the Yangxia Sag. Main gas accumulation time is 5-0 Ma and the corresponding Ro is in the range from 1.25 %-1.95 %. The loss rate of natural gas is 25 %-30 %.

关键词： hydrocarbon source rock methane generation carbon isotopic fractionation kinetics Kuqa Depression Tarim Basin

Traffic assignment problem under tradable credit scheme in a bi-modal stochastic transportation network: A cumulative prospect theory approach

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Journal of Central South University 2020年第1期27卷 180-197页

作者： HAN Fei ZHAO Xiang-mo CHENG Lin School of Automobile Chang’an UniversityXi’an 710064China School of Information Engineering Chang’an UniversityXi’an 710064China School of Transportation Southeast UniversityNanjing 210096China

The traffic equilibrium assignment problem under tradable credit scheme(TCS) in a bi-modal stochastic transportation network is investigated in this paper. To describe traveler’s risk-taking behaviors under uncertainty, the cumulative prospect theory(CPT) is adopted. Travelers are assumed to choose the paths with the minimum perceived generalized path costs, consisting of time prospect value(PV) and monetary cost. At equilibrium with a given TCS, the endogenous reference points and credit price remain constant, and are consistent with the equilibrium flow pattern and the corresponding travel time distributions of road sub-network. To describe such an equilibrium state, the CPT-based stochastic user equilibrium(SUE) conditions can be formulated under TCS. An equivalent variational inequality(VI) model embedding a parameterized fixed point(FP) model is then established, with its properties analyzed theoretically. A heuristic solution algorithm is developed to solve the model, which contains two-layer iterations. The outer iteration is a bisection-based contraction method to find the equilibrium credit price, and the inner iteration is essentially the method of successive averages(MSA) to determine the corresponding CPT-based SUE network flow pattern. Numerical experiments are provided to validate the model and algorithm.

关键词： tradable credit scheme cumulative prospect theory endogenous reference points generalized path costs stochastic user equilibrium variational inequality model heuristic solution algorithm

Herbal medicine Yin Zhi Huang induces CYP3A4-mediated sulfoxidation and CYP2C19-dependent hydroxylation of omeprazole

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Acta Pharmacologica Sinica 2007年第10期28卷 1685-1692页

作者： Lan FAN,Guo WANG,Lian-sheng WANG,Yao CHEN,Wei ZHANG,Yuan-fei HUANG,Rui-xue HUANG,Dong-li HU,DanWANG,Hong-hao ZHOU~2Pharmacogenetics Research Institute,Institute of Clinical Pharmacology,Central South University,Hu-nan 410078,China cogenetics Research Institute Institute of Clinical Pharmacology Central South University Hu-nan 410078 China. hhzhou2003@***.

Aim:To explore the potential interactions between Yin Zhi Huang (YZH) andomeprazole,a substrate of CYP3A4 and ***:Eighteen healthyvolunteers,including 6 CYP2C19~*1/~*1,6 CYP2C19~*1/~*2 or ~*3 and 6 CYP2C19~*2/~*2 were enrolled in a 2-phase,randomized,crossover clinical *** each phase,the volunteers received either placebo or 10 mL YZH oral liquid,3 times daily for *** all the patients took a 20 mg omeprazole capsule *** sampleswere collected up to 12 h after omeprazole *** concentrationsof omeprazole and its metabolites were quantified by HPLC with UV ***:After 14 d of treatment of YZH,plasma omeprazole significantlydecreased and those of omeprazole sulfone and 5-hydroxyomeprazole signifi-cantly *** ratios of the area under the plasma concentration-timecurves from time 0 to infinity (AUC0-∞of omeprazole to 5-hydroxyomprazole andthose of omeprazole to omeprazole sulfone decreased by 64.80%±12.51% (P=0.001) and 63.31%±18.45% (P=0.004) in CYP2C 19~*1/~*1,57.98%±14.80% (P=0.002)and 54.87%±18.42% (P=0.003) in CYP2C19~*1/~*2 or ~*3,and 37.74%±16.07% (P=0.004) and 45.16%±15.54% (P=0.003) in CYP2C19~*2/~*2,*** of the AUC0-∞ratio of omeprazole to 5-hydroxyomprazole in CYP2C19~*1/~*1and CYP2C19~*1/~*2 or ~*3 was greater than those in CYP2C19~*2/~*2 (P=0.047and P=0.009).Conclusion:YZH induces both CYP3A4-catalyzed sulfoxidationand CYP2C 19-dependent hydroxylation of omeprazole leading to decreases inplasma omeprazole concentrations.

关键词： Yin Zhi Huang induction CYP3A4 CYP2C19 omeprazole

Solid phase based DNA solution of the coloring problem

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Progress in Natural Science:Materials International 2004年第5期 85-88页

作者： PAN Linqiang , LIU Guangwu, XU Jin and LIU Yachun (1. Department of Control Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China 2. Research Group on Mathematical Linguistics, Rovira i Virgili University, Pl. Imperial Tarraco 1, 43005 Tarragona, Spain 3. Department of Mathematical and Physical Science, Nanhua University, Hengyang 421001, China) Department of Control Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China Research Group on Mathematical Linguistics Rovira i Virgili UniversityPl. Imperial Trraco 143005 TarragonaSpain Department of Control Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China Department of Mathematical and Physical Science Nanhua UniversityHengyang 421001China

DNA computing has the potential to tackle computationally difficult problems that have real-world implications. The parallel search capabilities of DNA make it a valuable tool for approaching intractable computational problems, for which conventional computers have limited potentials. Up to now, many accomplishments have been achieved to improve its performance and increase its reliability. In this paper, the coloring problem has been solved by means of molecular biology techniques. The coloring problem is a well-known NP-complete problem. This work represents further evidence for the ability of DNA computing to solve NP-complete problems.

关键词： DNA computing NP-complete problem coloring problem.

Kalman Filter Based FDI of Networked Control System

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Kalman Filter Based FDI of Networked Control System

The Application of Well Logging to CBM Exploration

第五届全球智能控制与自动化大会会议

作者： Ying Zheng Huajing Fang Department of Control Science and Engineering Huazhong University of Science and Technology Wuhan Hubei 430074 P.R.ChinaYanwei WangCAD CenterHuazhong University of Science and TechnologyWuhan Hubei 430074 P.R.China

＜正＞ Networked control system（NCS）deals with how torealize the close-loop control through *** diagnosisfor NCS is a new research *** this paper,network channelconnects the sensor and the *** NCS was regarded as asystem with output time-variant delay and white *** method was used to compensate the *** Kalman filters were constructed for NCS according todifferent system *** the respective residues were generatedand a fault detection and isolation（FDI）approach *** last,an example was given to show the feasibilityof the approach.

关键词： networked control system fault detection and isolation Kalman filter

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Journal of Energy and Power Engineering 2010年第4期4卷 12-19页

作者： J.F. Yu K. Guo X.X. Yuan Y. Yu College of Geological Science and Engineering Shandong University of Science and Technology Qingdao 266510 China

Well logging technology in coalbed methane （CBM） exploration may develop in two directions： one is the novel well logging methods; the other is the new interpretation methods for the conventional logging data, on which the authors of this paper concentrated mainly. The paper introduced several methods in calculating with well logs such important parameters as porosity, permeability and gas content of CBM reservoir and evaluated their effectiveness. A new method of well logging data interpretation was put forward for coalbed recognition, i.e., the combination of the principal component analysis and the wavelet transform. The authors find that the second principal component （PCA2） contains much more information of coalbed in the coal-bearing series and the reconstruction signal from the detailed wavelet coefficients at level 4 （PCA24） and 5 （PCA25） highlights the signature ofcoalbeds. In terms of the characteristics of CBM reservoir in China, the authors summarized the key points in the application of well logging technique to CBM exploration, and gave a guideline for further related research work.

关键词： CBM well logging neural network wavelet analysis