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Biomimetic staring infrared imaging omnidirectional detection technology

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Chinese Science Bulletin 2010年第27期55卷 3073-3080页

作者： wang yongzhong Shijiazhuang Mechanical Engineering College Shijiazhuang 050003 China

In order to realize omnidirectional real-time detection and awareness in thermal infrared (IR) region,a kind of biomimetic miniature IR imaging detection system (BMIRIDS) has been successfully *** is classified as a long wave IR(LWIR) system and a mid-wave IR(MWIR) *** former consists of a LWIR fish-eye lens and a LWIR focal plane array (FPA)-biomimetic electronic module,the latter consists of a MWIR fish-eye lens and a MWIR FPA-biomimetic electronic *** can provide complete hemispherical staring field of view,and have the capability to determine target bearings,to remove all stationary scene clutter and only detect moving targets,to sense targets range and their *** capability closely approximates the vision process performed in nature by biological ***,an additional biomimetic module block has been integrated into *** module block imitating the function of human vision produces the logarithmic brightness image,and enhances the target image outline by virtue of the Roberts gradient *** logarithmic transform permits expanding the dynamic range of optical incidence without saturating the electric circuit,and makes the image more suitable for *** and FPGA perform the aforesaid vision functions that are advantageous to detect and track ***,BMIRIDS can perform more powerful real-time signal and image processing on the resulting image data than the ordinary previous systems mainly by the aid of "software-only" *** BMIRIDS has a 2π-steradian (sr.) staring field-of-view,two of such systems opposed to one another would provide a complete view of space around the sensor *** addition,its low power consumption makes itself meet the manifold platforms' *** practice has proved that BMIRIDS can truly realize "omnidirectional" "real-time" situation awareness and dynamic information *** virtue of biomimetic technology,some limitations of the current photoe

关键词：仿生技术成像探测热红外红外焦平面阵列实时检测生物传感器中波红外长波红外

CHARACTERISTICS OF STRESS-INDUCED TRANSFORMATION AND MICROSTRUCTURE EVOLUTION IN Cu-BASED SMA

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Acta Mechanica Solida Sinica 2008年第1期21卷 1-8页

作者： Cheng Peng Xingyao wang yongzhong Huo Department of Mechanics and Engineering Science Fudan University Shanghai 200433 China

The mechanical behavior of shape memory alloys （SMAs） is closely related to the formation and evolution of its microstructures. Through theoretical analysis and experimental observations, it was found that the stress-induced martensitic transformation process of single crystal Cu-based SMA under uniaxial tension condition consisted of three periods： nucleation, mixed nucleation and growth, and merging due to growth. During the nucleation, the stress dropped rapidly and the number of interfaces increased very fast while the phase fraction increased slowly. In the second period, both the stress and the interface number changed slightly but the phase fraction increased dramatically. Finally, the stress and the phase fraction changed slowly while the number of interfaces decreased quickly. Moreover, it was found that the transformation could be of multi-stage： sharp stress drops at several strains and correspondingly, the nucleation and growth process occurred quasi-independently in several parts of the sample.

关键词： stress-induced martensitic transformation CuAINi single crystal microstructure,nucleation growth

The Goals of Carbon Peaking and Carbon Neutrality and China's New Energy Revolution

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Frontiers of Economics in China-Selected Publications from Chinese Universities 2022年第2期17卷 325-344页

作者： wang yongzhong Institute of World Economics and Politics Chinese Academy of Social SciencesBeijing 100732China

Based on the full consideration of both domestic and global environments and conditions,the adherence to the conviction that lucid waters and lush mountains are invaluable assets,and the comprehensive weighing of pros and cons,the Chinese government has made a major strategic decision to achieve the goals of carbon peaking and carbon neutrality,which is crucial to the overall green transformation of the economy and society and the long-term benefits of the Chinese *** the new energy revolution and energy mix diversification driven by the carbon peaking and carbon neutrality goals,nonfossil energy sources centered on photovoltaic energy will gradually dominate the energy mix,while the status of electricity and hydrogen energy will be significantly enhanced and the consumption of coal and petroleum will decline *** peaking and carbon neutrality goals are both challenges and opportunities for *** challenges are embodied in the large pressure of economic and energy restructuring,the rising manufacturing costs,the difficulties in withdrawing coal-fired power stations,the possibility of unstable grid operations due to large-scale integration of photovoltaic and wind power into the power distribution network,and the supply risks of key metals,while specific opportunities are emerging in the strong competitiveness of photovoltaic and wind power equipment,lower dependence on foreign petroleum and gas supply and accelerated low-carbon green *** should strengthen the top-level design of the path to achieve carbon peaking and carbon neutrality,encourage innovation of green low-carbon technologies,accelerate economic and energy restructuring,strictly restrict the construction of new high-emission and energy-intensive projects,and steadily promote the adjustment and withdrawal of the existing high-emission and energy-intensive projects.

关键词： carbon peaking carbon neutrality new energy revolution lowcarbon transition low-carbon economy

Effectiveness of Capital Controls and Sterilizations in China

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China & World Economy 2010年第3期18卷 106-126页

作者： yongzhong wang Associate Research Fellow Institute of World Economics and Politics Chinese Academy of Social Sciences Beijing China.

Since 2003, China has been facing a trilemma of determining how to maintain independent monetary policy and limit exchange rate flexibility simultaneously, while facing persistent and substantial international capital flows. The present paper is an empirical evaluation of the effectiveness of China＇s sterilizations and capital mobility regulations, measured by sterilization and offset coefficients, respectively, using monthly data between mid-1999 and March 2009. We find that the effectiveness of China＇s sterilizations is almost perfect in terms of the monetary base, but not in terms of M2, and that China＇s capital controls still work but are not quite effective. Recursive estimation reveals that increasing mobility of capital flows and decreasing effectiveness of sterilizations might undercut China＇s ability to maintain monetary autonomy and domestic currency stability simultaneously. To solve the trilemma smoothly, China＇s monetary authority should continue to relax the management of the exchange rate, and take further steps towards deregulation of capital outflows.

关键词： capital mobility effectiveness sterilization

Numerical analysis of ice accretion effects at super-cooled large droplet conditions on airfoil aerodynamics

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Journal of Modern Transportation 2011年第4期19卷 274-278页

作者： Chengxue LIU yongzhong wang Xinjiang Air Traffic Management Bureau Urumqi 830016 China College of Air Traffic Management Civil Aviation Flight University of China Guanghan 618307 China

Changes in flow field around NACA23012 airfoil from a clean condition to a super-cooled large droplet （SLD） condition were simulated, and variations in aerodynamic parameters were calculated using FLUENT. In the case of numerical simulation for a clean airfoil, flow field characteristics simulated agreed well with theory analysis, indicating that turbulence models and parameters setting are feasible. Aerodynamic parameters for iced airfoil were calculated using the same method and agreed with those measured test data under the same environment in icing wind tunnels by S. Lee. Conclusion is made that the numerical simulation is valid, and it can be an alternative to study ice accretion effects at the SLD condition on airfoil aerodynamics, leading to reduction in research cycle time and cost.

关键词： super-cooled large droplet wings ice accretion numerical simulation aerodynamics FLUENT

POSITIVE SOLUTIONS FOR A WEIGHTED FRACTIONAL SYSTEM

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Acta Mathematica Scientia 2018年第3期38卷 935-949页

作者： Pengyan wang yongzhong wang Department of Applied Mathematics Northwestern Polytechnical University Department of Applied Mathematics Northwestern Polytechnical University

In this article, we study positive solutions to the system{Aαu（x） = Cn,αPV∫Rn（a1（x-y）（u（x）-u（y）））/（｜x-y｜n＋α）dy = f（u（x）, Bβv（x） = Cn,βPV ∫Rn（a2（x-y）（v（x）-v（y））/（｜x-y｜n＋β）dy = g（u（x）,v（x））.To reach our aim, by using the method of moving planes, we prove a narrow region principle and a decay at infinity by the iteration method. On the basis of these results, we conclude radial symmetry and monotonicity of positive solutions for the problems involving the weighted fractional system on an unit ball and the whole space. Furthermore, non-existence of nonnegative solutions on a half space is given.

关键词： Weighted fractional system positive solution radial symmetry monotonicity non-existence

Characterization of the start-up behavior and steady-state performance of biotrickling filter removing low concentration toluene waste gas

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Science China(Technological Sciences) 2012年第6期55卷 1701-1710页

作者： CHEN Rong LIAO Qiang TIAN Xin wang yongzhong ZHU Xun MIAO JunHe Key Laboratory of Low-Grade Energy Utilization Technologies and Systems(Chongqing University) Ministry of EducationChongqing 400030China Institute of Engineering Thermophysics Chongqing UniversityChongqing 400030China

A biotrickling filter packed with the regular ceramic spheres was designed and fabricated to purify the low toluene-concentration waste *** attention was made to the study of the start-up behavior of the biotrickling ***,the steady performances were investigated to establish the experimental correlation between the operation factors and removal *** was found that the start-up process of the biotrickling filter exhibited three stages including the biofilm formation,biofilm development,and biofilm *** OD600 nm of the circulated liquid,gas pressure drop,elimination capacity,and temperature rise maintained at a rather low level in the biofilm formation stage,then increased rapidly in the biofilm development stage,and finally reached a stable value in the biofilm stabilization *** was also found that the removal efficiency of the biotrickling filter in the stable period decreased with increase in the waste gas flow rate,circulated liquid flow rate,and diameter of the ceramic *** interestingly,it was revealed the operation modes have a significant influence on the removal efficiency of the biotrickling filter,and the microorganism show a high activity under the operating temperature ranging from 30°C to 40°*** experimental correlations for describing the effect of operation factors on the removal efficiency of the biotrickling filters under both the co-current and counter-current operation modes were *** correlation results are in good agreement with the experimental data.

关键词： biotrickling filter biofilm start-up process removal efficiency operation mode toluene

A COMPLEX OF TWO OPTIMIZATION IDEAS IN OPTICAL AUTOMATIC DESIGN

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国防科技大学学报 1995年第3期17卷 95-103页

作者： wang yongzhong(Department of Applied Physics, NUDT, Changsha, 410073)

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ＡＣＯＭＰＬＥＸＯＦＴＷＯＯＰＴＩＭＩＺＡＴＩＯＮＩＤＥＡＳＩＮＯＰＴＩＣＡＬＡＵＴＯＭＡＴＩＣＤＥＳＩＧＮＷａｎｇＹｏｎｇｚｈｏｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＡｐｐｌｉｅｄＰｈｙｓｉｃｓ，ＮＵＤＴ，Ｃｈａｎｇｓｈａ，４１００７３）Ａｂｓｔｒａｃｔ：...

关键词：光学设计自动设计优化设计 DLS

Risks for and Precautions of China’s Foreign Exchange Reserves

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China Economic Transition 2019年第1期2卷 52-58页

作者： wang yongzhong of the Institute of World Economics and Politics Chinese Academy of Social Sciences

In view of China’s disadvantages in the fields of science and technology and finance,the Chinese government should take a long-term view and restrain from overreaction,so as to create a long-term stable and relaxed international environment for China’s *** the short term,China’s foreign exchange reserves management should maintain a low-key profile in its investment *** should not significantly reduce the amount of *** bonds held to avoid becoming a target of international market *** the medium term,China should reassess the investment returns and risks of the ***,and resolutely promote the diversification of foreign exchange reserve assets,as well as to optimize the currency structure and regional distribution of reserve assets based on the situation of Chinese economy.

关键词： assets finance investment