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Science China Chemistry 2010年第5期53卷 1113-1120页

作者： Zhai, Shuo hong, haiyan Zhou, YongFeng Yan, DeYue State Key Laboratory of Metal Matrix Composites College of Chemistry and Chemical Engineering Shanghai Jiao Tong University Shanghai 200240 China

A novel hyperbranched multiarm copolymer of HBPO-star-PDEAEMA with a hydrophobic poly(3-ethyl-3-(hydroxymethyl) oxetane)(HBPO) core and many cationic poly(2-(N,N-diethylamino) ethyl methacrylate)(PDEAEMA) arms has been synthesized through an atom transfer radical polymerization(ATRP) method,and been applied to spontaneously reduce and stabilize gold nanoparticles(AuNPs) in water without other additional *** size of the nanoparticles could be effectively controlled at about 4 nm,and the nanoparticles are extremely stable in solution without aggregation even for one *** was found that solution pH and the molar ratio of N/Au have certain effects on the size and stability of *** work provides a simple method for the synthesis of uniform and highly stable AuNPs.

关键词： gold nanoparticles hyperbranched polymers self-reduction stabilization

Investigation on Singularity, Signature Matrix and Spectrum of Mixed Graphs

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Journal of Donghua University(English Edition) 2019年第2期36卷 212-214页

作者： hong haiyan Jiang Huai College of Anhui University

The spectral theory of graph is an important branch of graph theory,and the main part of this theory is the connection between the spectral properties and the structural properties,characterization of the structural properties of *** discuss the problems about singularity,signature matrix and spectrum of mixed *** loss of generality,parallel edges and loops are permitted in mixed *** G1 and G2 be connected mixed graphs which are obtained from an underlying graph *** G1 and G2 have the same singularity,the number of induced cycles in Gi(i=1,2)is l(l=1,l>1),the length of the smallest induced cycles is 1,2,at least *** to conclusions and mathematics induction,we find that the singularity of corresponding induced cycles in G1 and G2 are the same if and only if there exists a signature matrix D such that L(G2)=DTL(G1)D.D may be the product of some signature *** L(G2)=D^TL(G1)D,G1 and G2 have the same spectrum.

关键词： mixed graph Laplacian matrix singularity signature matrix spectrum

Correction of Time-varying PMU Phase Angle Deviation with Unknown Transmission Line Parameters

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CSEE Journal of Power and Energy Systems 2023年第1期9卷 315-325页

作者： Ancheng Xue He Kong Feiyang Xu Junbo Zhao Naichao Chang Joe H.Chow haiyan hong State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power UniversityBeijing 102206China Department of Electrical and Computer Engineering University of ConnecticutStorrs06268USA National Electric Power Dispatching and Control Center Beijing 100031China Department of Electrical Computerand Systems EngineeringRensselaer Polytechnic Institute(RPI)TroyNY 12180USA

Phasor measurement units(PMUs)provide useful data for real-time monitoring of the smart ***,there may be time-varying deviation in phase angle differences(PADs)between both ends of the transmission line(TL),which may deteriorate application performance based on *** address that,this paper proposes two robust methods of correcting time-varying PAD deviation with unknown parameters of TL(ParTL).First,the phenomena of time-varying PAD deviation observed from field PMU data are *** general formulations for PAD estimation are then *** simplify the formulations,estimation of PADs is converted into the optimal problem with a single ParTL as the variable,yielding a linear estimation of *** latter is used by second-order Taylor series expansion to estimate PADs *** reduce the impact of possible abnormal amplitude data in field data,the IGG(Institute of Geodesy&Geophysics,Chinese Academy of Sciences)weighting function is *** using both simulated and field data verify the effectiveness and robustness of the proposed methods.

关键词： Correction line parameters parameter identification phasor measurement time-varying phase angle difference deviation

Protein folding mechanism revealed by single-molecule force spectroscopy experiments

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Biophysics Reports 2021年第5期7卷 399-412页

作者： Hao Sun Zilong Guo haiyan hong Ping Yu Zhenyong Xue Hu Chen Research Institute for Biomimetics and Soft Matter Fujian Provincial Key Lab for Soft Functional Materials Research Department of Physics Xiamen University Center of Biomedical Physics Wenzhou Institute University of Chinese Academy of Sciences Oujiang Laboratory

Force spectroscopy experiments use mechanical force as a control factor to regulate the folding and unfolding process of proteins. Atomic force microscopy has been widely used to study the mechanical stability of proteins, and obtained unfolding forces and unfolding distance of different proteins, while recently, more low force folding and unfolding measurements were done by optical tweezers and magnetic tweezers. Due to the relatively small distortion of the free energy landscape, low force measurements give the free energy landscape information over bigger conformational space. In this review, we summarize the results of force spectroscopy experiments on different proteins. The unfolding distance obtained at high forces by atomic force microscopy are mostly smaller than 2 nm, while the unfolding distances at low forces distribute over a larger range: from a negative value to more than 6 nm. The sizes of the transition states at low force are ～4 nm for most compact two-state globular proteins,which indicates that this transition state might be the general free energy barrier separating the unfolded state and the theoretically predicated molten globule state. Up to now, only a limited number of proteins has been studied at low forces. We expect that more and more proteins with different conformations will be studied at low forces to reveal the general protein folding mechanism.

关键词： Protein folding Free energy landscape Force spectroscopy Molten globule state Transition state

Equilibrium folding and unfolding dynamics to reveal detailed free energy landscape of src SH3 protein by magnetic tweezers

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Chinese Physics B 2021年第7期30卷 595-599页

作者： Huanhuan Su Hao Sun haiyan hong Zilong Guo Ping Yu Hu Chen Institute for Biomimetics and Soft Matter Fujian Provincial Key Laboratory for Soft Functional Materials ResearchDepartment of PhysicsXiamen UniversityXiamen 361005China Center of Biomedical Physics Wenzhou InstituteUniversity of Chinese Academy of SciencesWenzhou 325000China Oujiang Laboratory Wenzhou 325000China

Src SH3 protein domain is a typical two-state protein which has been confirmed by research of denaturant-induced unfolding *** spectroscopy experiments by optical tweezers and atomic force microscopy have measured the force-dependent unfolding rates with different kinds of pulling ***,the equilibrium folding and unfolding dynamics at constant forces has not been ***,using stable magnetic tweezers,we performed equilibrium folding and unfolding dynamic measurement and force-jump measurement of src SH3 domain with tethering points at its N-and *** the obtained force-dependent transition rates,a detailed two-state free energy landscape of src SH3 protein is constructed with quantitative information of folding free energy,transition state barrier height and position,which exemplifies the capability of magnetic tweezers to study protein folding and unfolding dynamics.

关键词： protein folding and unfolding magnetic tweezers free energy landscape transition state

Experimental Study on Foaming Slag for Stainless Steel Making

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Experimental Study on Foaming Slag for Stainless Steel Makin...

第二届先进钢铁结构材料国际会议

作者： JIAO haiyan, hong Xin (Shanghai University, Shanghai 200072, China)

Foaming slag is very significant in electrical arc furnace operation. But it is very difficult to form in the process of making stainless steel, due to the shortage of FeO in the slag. In this article the essential of foaming slag was discussed and its behavior was analyzed from experimental tests in a 2500Hz Induction Furnace in laboratory. Given quantity of dolomite and limestone was added to slag for generalization of CO by heating, which could react with carbon and then form CO-gas. With help of Pattern-Recognition-Method the optimized compound area for best foaming was also found, within them a slag system with basicity of 2.0 and contents of CaO(33.2%)-SiO(17%)-MgO(11.5%)-AlO(17%)-CaF(6.6%) was chosen and introduced. The study showed that CaF content was the most important factor to affect the foaming thickness of slag, followed by contents AlO, MgO and basicity.

关键词： Stainless Steel Making Foaming Slag EAF

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农户参与土地承包经营权抵押贷款的行为研究

西北农林科技大学学报（社会科学版） 2017年第4期17卷 83-89页

作者：安海燕洪名勇浙江大学中国农村发展研究院杭州310058 贵州大学管理学院贵阳550025

利用全国4个土地承包经营权抵押贷款试点区1 156份有贷款需求的农户数据,探讨农户参与土地承包经营权抵押贷款的行为机制。具体研究影响农户参与行为的因素,农户参与意愿与参与行为的关系。从计划行为理论的视角来看,农户参与抵押贷款... 详细信息

利用全国4个土地承包经营权抵押贷款试点区1 156份有贷款需求的农户数据,探讨农户参与土地承包经营权抵押贷款的行为机制。具体研究影响农户参与行为的因素,农户参与意愿与参与行为的关系。从计划行为理论的视角来看,农户参与抵押贷款的意愿与行为既具有差异性又显著正相关;行为态度通过合作意愿完全中介农户参与行为,主观规范与感知行为控制直接与部分中介农户参与行为。

关键词：计划行为理论土地承包经营权抵押贷款参与意愿参与行为

基于包络圆的改进振型分解反应谱法与内力极值点的甄别

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地震工程与工程振动 2020年第6期40卷 122-130页

作者：李建波洪海燕大连理工大学建设工程学部辽宁大连116024 国核电力规划设计研究院有限公司北京100095

包络圆法是振型分解反应谱法的更符合实际的显著发展,但在极值内力点选取方面精确性与效率均有不足,影响其广泛应用。将遗传算法运用到内力包络圆的离散中,并将包络圆法应用到钢筋混凝土偏心受拉(压)构件在地震作用下静动内力组合配筋... 详细信息

包络圆法是振型分解反应谱法的更符合实际的显著发展,但在极值内力点选取方面精确性与效率均有不足,影响其广泛应用。将遗传算法运用到内力包络圆的离散中,并将包络圆法应用到钢筋混凝土偏心受拉(压)构件在地震作用下静动内力组合配筋计算过程中,给出使用该方法与传统SRSS、CQC方法相比配筋量的节省裕度。用遗传算法离散包络圆可以获得配筋率的极大值点,此种离散方法与现有离散方法如虚拟模态法相比,提升了准确度、减少了计算量。与传统的SRSS、CQC方法相比,包络圆法可以考虑不同内力发生的同时性,将包络圆法应用于钢混结构偏心受力构件中,与传统的振型分解反应谱法相比可节省一定的配筋率,并给出影响节省配筋率大小的因素。

关键词：包络圆法遗传算法离散配筋计算

符合2010版GMP要求的过滤工艺溶出物/析出物验证

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中国医药工业杂志 2012年第6期43卷 513-516页

作者：蒋震董巍洪海燕颇尔中国生命科学部上海201203

结合新版GMP要求、中外法规比较和西方制药实践,阐述溶出物/析出物验证是过滤工艺验证的组成部分,并对溶出物/析出物验证的定义、区别、验证常用方法和后续安全性评估方式进行介绍。

关键词：过滤溶出物析出物验证

A Queue Management Algorithm of Relative Discrimination for Differentiated Services

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A Queue Management Algorithm of Relative Discrimination for ...