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Study on Aerodynamic Design Optimization of Turbomachinery Blades

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Journal of Thermal Science 2005年第4期14卷 298-304,320页

作者： Naixing CHEN Hongwu zhang Weiguang huang Yanji XU Institute of Engineering Thermophysics Chinese Academy of Sciences EO. Box 2706 Beijing 100080China

This paper describes the study on aerodynamics design optimization of turbomachinery blading developed by the authors at the Institute of Engineering Thermophysics, Chinese Academy of Sciences, during the recent few years. The present paper describes the aspects mainly on how to use a rapid approach of profiling a 3D blading and of grid generation for computation, a fast and accurate viscous computation method and an appropriate optimization methodology_ including a blade parameterization algorithm to optimize tm-bomachinery blading aerodynamically. Any blade configuration can be expressed by three curves, they are the camber lines, the thickness distributions and the radial stacking line, and then the blade geometry can be easily parameterized by a number of parameters with three polynomials. A gradient-based parameterization analytical method and a response surface method were applied herein for blade optimization. It was found that the optimization process provides reliable design for turbomachinery with reasonable computing time.

关键词： aerodynamic design optimization response surface method blade parameterization 3D aerodynamics of turbomachinery.

Affinity Switching for Lysozyme and Dual-responsive Microgels by Stopped-flow Technique： Kinetic Control and Activity Evaluation

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Chinese Journal of Polymer Science 2017年第8期35卷 950-960页

作者： yun-zhu wu zhi-huang zhang xin han jian zhang wen-ming zhang 殷俊 Department of Polymer Science and Engineering School of Chemistry and Chemical Engineering Hefei University of Technology and Anhui Key Laboratory of Advanced Functional Materials and Devices Hefei 230009 China

The use of proteins as therapeutics in nanomedicine is an emerging research field and has developed ***,proteins are always vulnerable to renal excretion or digestion by the proteolytic system in vivo,which limits their usage to a large *** biocompatible polymers have been covalently linked to proteins to protect them from recognition by the immune system and prolong their circulation time,the biological activity of them is sometimes *** fill this gap,physical isolation,wrapping,or encapsulation techniques are *** to now,various mature examples were reported,but the whole time scales for guest molecules loading and releasing,especially the initial rapid loading process,were rarely ***,a series of dual-responsive poly（N-isopropylacrylamide-co-methacrylic acid）（P（NIPAM-co-MAA）） microgels were synthesized and employed to investigate the kinetics of in situ complexation and release of lysozyme under external stimuli modulation upon a stopped-flow apparatus,which was suitable for rapid dynamic *** inspection of the adsorption kinetics during the early stages（〈 50 s） revealed that the initial microgel collapse occurred within ~1 s,with more rapid transitions being observed when higher lysozyme concentrations were *** the dynamic traces could be well fitted with a double exponential function,suggesting a fast（τ1） and a slow（τ2） relaxation time,***,the kinetics of releasing bound lysozyme from microgels was carried on by utilizing the p H-responsive property,and the evaluation of the activity of released lysozyme was synchronously measured in a Micrococcus lysodeikticus（***） cell *** corresponding relaxation time（τ） was also calculated by fitting the recorded dynamic *** speculate that this work can provide basic dynamics data and theoretical basis for microgels based nanocarriers to be used for protein delivery,controlled release,and possible chemical sepa

关键词： responsive relaxation traces encapsulation lysozyme inspection Micrococcus fitting utilizing kinetics

Response characteristics of sonar receiver under intense sound pulse

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Journal of Systems Engineering and Electronics 2012年第6期23卷 843-848页

作者： Kaizhuo Lei Qunfei zhang Ziliang Qiao Lingling zhang Qiang huang Shiqing Wang College of Marine Engineering Northwestern Polytechnical University Xi' an 710072 P. R. China

For anti-jamming and anti-countermeasure techniques of the sonar receiver, the response characteristics of the automatic gain control （AGC） circuit and the survivability of the prime circuit under strong interference are analyzed by simulations and experiments. An AGC simulation model based on the voltage control amplifier VCA810 prototype is proposed. Then static and dynamic simulations are realized with single frequency signal and linear frequency modulated （LFM） signal commonly used in the active sonar. Based on intense sound pulse （ISP） interference experiments, the real-time response characteristics of each module of the receiver are studied to verify the correctness of the model as well as the simulation results. Simulation and experiment results show that, under 252 dB/20 μs ISP interference, the specific sonar receiver will produce sustained cut top oscillation above 30 ms, which may affect the receiver and block the regular sonar signal.

关键词： sonar receiver response characteristic simulationand experiment strong interference intense sound pulse (ISP),automatic gain control (AGC).

促牙本质再矿化树脂粘接材料提高牙本质粘接耐久性的研究进展

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口腔颌面修复学杂志 2024年第3期25卷 234-240页

作者：苗瑞婧张存宝张黄王永武杭州市第一人民医院口腔科杭州市第一人民医院杭州310000

促进牙本质再矿化是提高树脂-牙本质粘接耐久性的重要方法,国内国际有很多关于改性树脂粘接剂的研究,均致力于诱导混合层裸露牙本质胶原的再矿化。本文针对树脂-牙本质粘接面的耐久性问题,阐述了促牙本质再矿化树脂粘接材料的研究进展... 详细信息

促进牙本质再矿化是提高树脂-牙本质粘接耐久性的重要方法,国内国际有很多关于改性树脂粘接剂的研究,均致力于诱导混合层裸露牙本质胶原的再矿化。本文针对树脂-牙本质粘接面的耐久性问题,阐述了促牙本质再矿化树脂粘接材料的研究进展。促牙本质再矿化树脂粘接材料的改性策略包括:生物活性无机微填料策略,即以硅酸盐、磷酸钙盐和生物活性玻璃等无机材料为矿化离子来源诱导牙本质再矿化;仿生再矿化策略,即应用仿生类似物模拟非胶原蛋白(non-collagenous proteins,NCPs)的功能,引导矿物前驱体在特定位点矿化以获得与生物矿化类似的有序晶体沉积;以及锌添加剂保护胶原蛋白、介孔硅材料作为矿物离子输送系统的改性策略。

关键词：树脂粘接材料牙本质粘接牙本质再矿化

Multisoliton Solutions of the (2+1)-Dimensional KdV Equation

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Communications in Theoretical Physics 2001年第11期36卷 523-524页

作者： zhang Jie-Fang huang Wen-Hua Institute of Nonlinear Physics Zhejiang Normal UniversityJinhua 321004China Institute of Nonlinear PhysicsZhejiang Normal UniversityJinhua 321004China Department of Physics Jiangxi Yichun CollegeYichun 336000China

Using the extension homogeneous balance method,we have obtained some new special types of soliton solutions of the (2+1)-dimensional KdV *** from the homogeneous balance method,one can obtain a nonlinear transformation to simple (2+1)-dimensional KdV equation into a linear partial differential equation and two bilinear partial differential ***,one can obtain only a kind of soliton-like *** this letter,we find further some special types of the multisoliton solutions from the linear and bilinear partial differential equations.

关键词： multisoliton,(2+1)-dimensions,KdV equation

A rejection sampling algorithm for off-centered discrete Gaussian distributions over the integers

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Science China(Information Sciences) 2019年第3期62卷 196-198页

作者： Yusong DU Baodian WEI huang zhang School of Data and Computer Science Sun Yat-sen University Guangdong Key Laboratory of Information Security Technology Chongqing Key Lab of Computer Network and Communication Technology

Dear editor,Discrete Gaussian sampling, that is, sampling from a discrete Gaussian distribution D;with parameter σ> 0 and center c∈R;over an ndimensional lattice Λ, has been considered by the cryptography research community as one of the fundamental building blocks of lattice-based cryptography [1, 2]. The simplest lattice is the one-

关键词： A rejection sampling algorithm for off-centered discrete Gaussian distributions over the integers

Development of Alfalfa (Medicago sativa L.) Regeneration System and Agrobacterium-Mediated Genetic Transformation

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Agricultural Sciences in China 2010年第2期9卷 170-178页

作者： zhang He huang Qi-man SU Jin Biotechnology Research Institute Chinese Academy of Agricultural Sciences Beijing 100081 P.R.China

The regeneration ability of four alfalfa （Medicago sativa L.） cultivars, Xinjiang Daye, Longdong, Gannong 1 and Gannong 3, was studied, and the effects of various cultivars, explant sources and medium recipes on regeneration were compared. The better callus forming frequency obtained from hypocotyls of Xinjiang Daye is 88.5% and regeneration frequency is 9.8% in our initial experiments. To further optimize regeneration system for genetic transformation, we therefore changed concentrations of plant growth regulators and supplemented with glutamine into callus-induction and shoot-regeneration media. Callus forming frequency and shoot differentiation frequency were increased to 100%. The time taken to generate transgenic plants （16 weeks） was shorter than that for previouse procedure （25 weeks） and regeneration frequency was promoted to 15.1%. The results show that addition of glutamine is particularly important for shortening period of regeneration and promoting regeneration frequency. For study of genetic transformation of alfalfa, Agrobacterium tumefaciens-mediated transformation of Xinjiang Daye was developed based on this optimized regeneration system. The plant expression vector carrying two glutamine synthetases （GS 1 and GS2） and △1-pyrroline-5-carboxylate synthetase （P5CS） gene was used for alfalfa in vitro transformation. Six transgenic alfalfa plantlets with resistance to PPT were obtained. The introduction of foreign genes into plants was assessed in the transformants by PCR analysis and Southern hybridizations.

关键词： alfalf glutamine synthetases △1-pyrroline-5-carboxylate synthetase Agrobacterium tumefaciens-mediated transformation transgenic alfalfa

Influence of the ambient air temperature on the electrical contact reliability of electromagnetic relay

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第3期8卷 485-489页

作者： YAO Fang ZHENG Jian-rong huang zhang-wu People Electric Appliances Group Yueqing 32560 China

The dynamic contact resistances of HH52P electromagnetic relays are measured under different ambient air tem- perature. Their diagnostic parameters are extracted and determined. It is found that the ambient air temperature obviously influ- ences some parameters. In order to research its influence on the electrical contact reliability of electromagnetic relay, the statistic analysis is applied to study the static contact resistance, the max of the dynamic contact resistance and the bounce time. It is found that the ambient air temperature regularly influences the three parameters. Thoroughly, the phenomenon is studied and analyzed in the point of material science so as to probe into the essential matter of it.

关键词： Ambient air temperature Electromagnetic relay Electrical contact reliability Contact resistance Bounce time

Capability Model for Case-Based Reasoning in Collaborative Commerce Environment

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Tsinghua Science and Technology 2005年第Z1期10卷 790-796页

作者： zhang Chenghong CHEN Langtao zhang Cheng huang Lihua School of Management Fudan University Shanghai 200433 China School of Management Fudan University Shanghai 200433 China School of Management Fudan University Shanghai 200433 China School of Management Fudan University Shanghai 200433 China

Collaborative commerce (c-commerce) has become an innovative business paradigm that helps companies achieve high operational performance through inter-organizational collaboration. This paper presents an effective case-based reasoning (CBR) capability model for solution selection in c-commerce applications, as CBR is widely used in knowledge management and electronic *** on the case-based competence model suggested by Smyth and McKenna, a directed graph was used to represent the collaborative reasoning history of CBR systems, where information of reasoning process ability was extracted. Experiment was carried out on a travel dataset. By integrating case-based competence and reasoning process ability, the capability is more suitable to reflect the real ability of CBR systems. The result shows that the proposed method can effectively evaluate the capability of CBR systems and enhance the performance of collaborative case-based reasoning in c-commerce environment.

关键词： case-based reasoning collaborative commerce capability