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Search Results: 1 - 10 of 104182 matches for " Yuansen Zhang "
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New Method of Measuring the Positive-sequence Capacitance of T-connection Transmission Lines  [PDF]
Yuansen Zhang, Demin Cui, Qingtao Cao, Yongqiang Chai, Peng Liu, Xiaobo Li, Zhijian Hu, Chuanqi Li, Chengxue Zhang
Energy and Power Engineering (EPE) , 2013, DOI: 10.4236/epe.2013.54B180

A novel method of measuring the positive-sequence capacitance of T-connection transmission lines is proposed. The mathematical model of the new method is explained in detail. In order to obtain enough independent equations, three independent operation modes of T-connection transmission lines during the line measurement are introduced. The digital simulation results and field measurement results are shown. The simulation and measurement results have validated that the new method can meet the needs of measuring the positive-sequence capacitance of T-connection transmission lines. This method has been implemented in the newly developed measurement instrument.


Zou Yuanxi,Zhou Jieheng,Xu Yuansen,Zhao Pengnian,Zhang Ziqing Chou Yuanhsi,

金属学报 , 1982,
Abstract: A modified Gibbs-Duhem equation has been derived with a view to evalu- ating activities of both components of a binary system from the measured ratios of the activities of the two components.This equation has been applied to a num- ber of melts of systems PbCl_2-SnCl_2,PbCl_2-CdCl_2,AgCl-CuCl,Cu_2S-FeS,PbO-BiO_(1.5), PbO-SbO_(1.5),CaO-CaF_2 and CaO-SiO_2-CaF_2 on the basis of our own experimental data as well as those reported in the literature. The method of evaluating activities of Ag and Pb from the binary phase diagram developed a long time ago has been extended to binary systems having a single AB compound.Activities in the In-Sb and Sn-Te systems have been eval- uated in this way. The use of a properly chosen non-ferrous metal instead of Fe as the solvent in the study of slag-metal equilibria with a view to evaluating activities in some ferrous slags has been shown to help in overcoming certain experimental difficul- ties.The systems CaO-SiO_2,CaO-Al_2O_3 and CaO-SiO_2-Al_2O_3 have been investiga- ted by bringing Sn or Cu into equilibrium with the slags.Our recent data on the CaO-SiO_2 system are believed to be sufficiently accurate for the first time to provide a basis for testing the validity of the Masson model.
Survey of Intracellular Protein Extraction Methods from Pichia pastoris  [PDF]
Yuli Wang, Yuansen Hu, Yang Lei, Yangyong Lv, Le Wang, Hongwei Wei
World Journal of Engineering and Technology (WJET) , 2015, DOI: 10.4236/wjet.2015.34C001

The broken efficiency of cell wall and the release amount of Pichia pastoris intracellular protein under different cell breaking conditions were investigated in this paper. The results showed that broken efficiency using hot alkali combined with high-pressure homogenizing method was higher than that of enzyme hydrolysis, hot alkali treatment and high-pressure homogenation, respectively. Suspended medium had little effect on the broken efficiency of yeast cell, but had significant effect on the protein release yield. The results indicated that optimal condition for intracellular proteins extraction was 30% (wet weight, w/v) of yeast cells suspend in 50 mM phosphate buffer (pH 10.0), water bathed at 60?C for 2 hours, homogenized twice at 100 MPa pressure. The broken efficiency of Pichia pastoris cell could reach 87.6% and the protein yield was 35.48 g per 100 g cells.

Isolation and identification of a Bacillus amyloliquefaciens YB-3 against Rhizoctonia solani

Xiaofei Zhu,Xiaoxia Zhang,Yongchun Niu,Yuansen Hu,Yanchun Yan,Haisheng Wang,

微生物学报 , 2011,
Abstract: Objective] An antagonistic bacterial strain YB-3 against Rhizoctonia solani was isolated from soils.Methods] Antagonistic strains were isolated by a reporter strain method.YB-3 was identified based on morphology observation,physiological and biochemical characterizations,Biolog,G+C content and 16S rDNA sequence analysis.The antagonistic spectrum and the properties of the inhibitor produced by Bacillus amyloliquefaciens YB-3 against plant pathogenic fungi and bacteria were investigated by means of plate tw...
Design Aspects of CMOS Compatible On-Chip Antenna for Applications of Contact-Less Smart Card

Ni Hao,Xu Yuansen,

半导体学报 , 2003,
Abstract: 论述了用CMOS工艺实现非接触式IC卡天线的集成化需要考虑的各个方面,建立了集成天线的模型,给出了合理的设计方案,并通过实验验证了模型和设计方案.实验结果表明,采用片上天线完全可以提供非接触式IC卡工作所需要的能量.在频率为2 2 .5 MHz、感应强度为6×10 - 4 T的磁场中,面积为2 m m×2 mm的集成天线可以为10 kΩ的负载提供1.2 2 5 m W的能量.
Spatial composition and diversity of bacterial community in a municipal solid waste landfill via denaturing gradient gel electro- phoresis (DGGE)

CHEN Hongge,HU Yuansen,JIA Xincheng,WU Kun,

环境科学学报 , 2005,
Abstract: 采用PCR-DGGE技术对垃圾填埋场细菌种群垂直分布及组成多样性进行了研究.结果表明:垃圾填埋场细菌种群组成波动较大,某些种群对环境因子的变化十分敏感.在填埋年龄已达3a的取样点,细菌种群的多样性随着垃圾填埋深度的增加而呈现“多—少—多”的变化趋势。各种群间相对密度也呈现由不均一到均一的变化规律,部分层次优势种和非优势种发生较大变化.填埋深度4.0m至6.25m左右的区域是填埋场微生物区系组成发生变化的过渡区,该区域细菌种群的多样性较小,亲缘关系相差比较大的种交叉在一起,具有明显的过渡特征.从时间因素来看,填埋场同层次微生物群落组成随时间延长,种群构成趋于稳定.表层垃圾1~2a内,细菌种群处于交替更叠的阶段,日趋发育成熟.8.25m以下层次的细菌种群主要受填埋深度影响,与填埋时间关系较小。
An Efficient and Concise Algorithm for Convex Quadratic Programming and Its Application to Markowitz’s Portfolio Selection Model  [PDF]
Zhongzhen Zhang, Huayu Zhang
Technology and Investment (TI) , 2011, DOI: 10.4236/ti.2011.24024
Abstract: This paper presents a pivoting-based method for solving convex quadratic programming and then shows how to use it together with a parameter technique to solve mean-variance portfolio selection problems.
Investigation and Analysis of Sexual Harassment in Corporate Workplace of China  [PDF]
Xiaobing Zhang, Zewei Zhang
Sociology Mind (SM) , 2012, DOI: 10.4236/sm.2012.23038
Abstract: At present, sexual harassment in domestic workplace has a high probability of occurrence, which causes more and more attention. In this paper, the form of sexual harassment in workplace, and how to solve the sexual harassment were investigated and analyzed through questionnaires; and countermeasures and management suggestions were put forward from three aspects of corporate, employees and family.
Chaos Control in a Discrete Ecological System  [PDF]
Limin Zhang, Chaofeng Zhang
International Journal of Modern Nonlinear Theory and Application (IJMNTA) , 2012, DOI: 10.4236/ijmnta.2012.13011
Abstract: In research [1], the authors investigate the dynamic behaviors of a discrete ecological system. The period-double bifurcations and chaos are found in the system. But no strategy is proposed to control the chaos. It is well known that chaos control is the first step of utilizing chaos. In this paper, a controller is designed to stabilize the chaotic orbits and enable them to be an ideal target one. After that, numerical simulations are presented to show the correctness of theoretical analysis.
Crystallization and Characterization of a New Fluorescent Molecule Based on Schiff Base  [PDF]
Dehua Zhang, Xiaoyan Zhang
Journal of Crystallization Process and Technology (JCPT) , 2013, DOI: 10.4236/jcpt.2013.31004

In this analysis, the single crystal of schiff base has been synthesized and the purity of material has been increased by repeated recrystallization process. Single crystal was grown by adopting the method growing in a slow evaporation solution using ethanol as solvent at room temperature. A new fluorescent molecule based on Schiff base has been synthesised and its binding properties investigated by fluorescence spectroscopy to show that it can selectively bind Cu2+ with fluorescence quenching.

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