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Recent Progress on the Maxwell’s Equations for Describing a Mechano-Driven Medium System with Multiple Moving Objects/Media

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Electromagnetic Science 2023年第2期1卷 1-16页

作者： Zhong lin Wang Jiajia shao Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of SciencesBeijing 101400China Georgia Institute of Technology AtlantaGeorgia 30332-0245USA School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China

Maxwell’s equations for a mechano-driven media system(MEs-f-MDMS)have been used to characterize the electromagnetism of multislow-moving media that may be accelerated with complex *** an approach starts from the integral forms of the four physics laws and is different from the classical approach of using the Lorentz transformation for correlating the electromagnetic phenomena observed in two inertial reference frames with relative *** governing equations inside the moving object/medium are the MEs-f-MDMS,and those in vacuum are the classical Maxwell’s equations;the full solutions of both reconcile at the medium surface/interface and satisfy the boundary *** paper reviews the background,physical principle,and mathematical derivations for formulating the *** are also presented for mathematically solving the *** unique advances made by the MEs-f-MDMS have been systematically summarized,as are their potential applications in *** found that the Lorentz transformation is perfect for treating the electromagnetic phenomena of moving point charges in vacuum;however,for moving objects,the covariance of Maxwell’s equations may not hold,and use of the MEs-f-MDMS may be required if the velocity is ***,recent advances for treating the boundary conditions at the nanoscale without assuming an abrupt boundary are also reviewed.

关键词： Maxwell’s equations for a mechano-driven medium system(MEs-f-MDMS) Maxwell’s equations Lorentz transformation Noninertia reference frame Special relativity Triboelectric nanogenerator(TENG).

Quantitative HRTEM and its application in the study of oxide materials

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Chinese Physics B 2018年第5期27卷 22-32页

作者： Chun-lin Jia[[ shao-Bo Mi Lei Jin Ernst Ruska-Centre (ER-C) for Microscopy and Spectroscopy with Electrons Forschungszentrum Julich GmbH 52425 Julich Germany School of Microelectronics Xi'an Jiaotong University Xi'an 710049 China State Key Laboratory for Mechanical Behaviour of Materials Xi'an Jiaotong University Xi'an 710049 China

On the basis of a state-of-the-art aberration-corrected transmission electron microscope, the spherical aberration coefficient CSof the objective lens can be tuned to either a positive or a negative value. The use of a negative value of CS combined with an overfocus setting of the objective lens leads to the development of the negative CSimaging（NCSI） technique. Images obtained using the NCSI technique show superior contrast and signal intensity at atomic column positions than the corresponding positive CSimages, especially for weakly scattering oxygen columns that are in close proximity to strongly scattering cation columns in oxides. Based on the images obtained under the NCSI condition, quantification of the image contrast allows measurements of the atom positions with a precision of a few picometers and the local chemistry on atomic scale. In the present review, we discuss firstly the benefits of the NCSI technique in studies of oxide materials,and then show a procedure for quantitative analysis of the image based on the absolute value of contrast. In the last part,examples are given for the application of the quantitative high-resolution transmission electron microscopy（HRTEM） to the study of electric dipoles of oxide ferroelectrics and atomic-scale chemistry of interfaces.

关键词： quantitative high-resolution transmission electron microscopy (HRTEM) negative Cs imaging(NCSI) aberration-correction functional oxides

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城市热岛效应对城市规划的影响

中山大学学报（自然科学版） 2007年第5期46卷 59-63页

作者：彭少麟叶有华中山大学有害生物控制及资源利用国家重点实验室广东广州510275

在综合分析城市热岛效应的基础上,论述了城市热岛效应对城市规划的影响。城市热岛效应是城市化形成的特殊城市气候,是现代都市的典型气候特征之一。城市热岛效应具有明显的时空分布特征,它的形成与城市下垫面性质和城市能耗等许多因子... 详细信息

在综合分析城市热岛效应的基础上,论述了城市热岛效应对城市规划的影响。城市热岛效应是城市化形成的特殊城市气候,是现代都市的典型气候特征之一。城市热岛效应具有明显的时空分布特征,它的形成与城市下垫面性质和城市能耗等许多因子有关。城市热岛效应对城市空气动力学、城市森林规划、城市色彩规划、城市能源规划以及城市规模等方面都具有极大的影响。城市规划部门和有关专家应根据城市热岛效应的形成机制及其时空分布特征,制定合理的城市规划,以期最大限度地消除或缓解城市热岛效应,实现经济、社会和自然的和谐发展。

关键词：城市热岛效应城市规划影响

Stable Estimation of Horizontal Velocity for Planetary Lander with Motion Constraints

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IEEE/CAA Journal of Automatica Sinica 2015年第2期2卷 198-206页

作者： Wei shao Shulin Sui lin Meng Yaobin Yue College of Automation&Electronic Engineering Qingdao University of Science&Technology School of Mathematics&Physics Qingdao University of Science&Technology

The planetary lander usually selects image feature points and tracks them from frame to frame in order to determine its own position and velocity during landing. Aiming to keep features tracking in consecutive frames, this paper proposes an approach of calculating the field of view (FOV) overlapping area in a 2D plane. Then the rotational and translational motion constraints of the lander can be found. If the FOVs intersects each other, the horizontal velocity of the lander is quickly estimated based on the least square method after the ill-conditioned matrices are eliminated previously. The Monte Carlo simulation results show that the proposed approach is not only able to recover the ego-motion of planetary lander, but also improves the stabilization performance. The relationship of the estimation error, running time and number of points is shown in the simulation results as well. © 2014 Chinese Association of Automation.

关键词： Intelligent systems Landing Least squares approximations Monte Carlo methods Velocity

Paraventricular Thalamus as A Major Thalamic Structure for Wake Control

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Neuroscience Bulletin 2019年第5期35卷 946-948页

作者： Yu-Feng shao Jian-Sheng lin Yi-Ping Hou Departments of Neuroscience Anatomy Histology and Embryology Key Laboratory of Preclinical Study for New Drugs of Gansu Province School of Basic Medical Sciences Lanzhou University Lanzhou 730000 China Integrative Physiology of the Brain Arousal Systems Lyon Neuroscience Research Center Lyon 69373 France

The thalamus is the gate of the cerebral cortex, the ultimate target for the neural networks controlling behavioral states and cognitive functions. According to the reticular theory initially proposed by Moruzzi and Magoun, excitatory inputs from large reticular zones of the brainstem via widespread intra- and extra-thalamocortical systems finally activate the cerebral cortex to cause generalized cortical activation and wakefulness [1]. This theory proposes a central relay role to the thalamus for cortical activation as supported by early studies using neurodegeneration techniques and by the elegant work of Steriade’s group and other investigators illustrating the electrophysiological mechanisms of the thalamocortical system at the cellular level during wakefulness, rapid eye-movement sleep (REMs) and non-REM sleep (NREMs)[2].

关键词： Paraventricular Thalamus Thalamic Structure Wake Control

Successive interference cancellation (SIC) in V-BLAST systems with asynchronous transmission mode

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Science in China(Series F) 2009年第12期52卷 2317-2323页

作者： lin HuaJiong TANG youXi GUAN Lu shao ShiHai National Key Lab of Communications University of Electronic Science and Technology of China Chengdu 610054 China

The V-BLAST system with asynchronous transmission mode first proposed by shao can achieve full diversity only by using a simple linear detection scheme under zero forcing （ZF） criterion; therefore it gives a reasonable tradeoff between complexity and performance. In this paper, we propose two types of successive interference cancellation （SIC） detection schemes for the asynchronous V-BLAST system, one is characterized by applying Mr successive interference cancellators before a maximal ratio combiner （where Mr is the number of receive antennas）, and the other has a maximal ratio combiner before a successive interference cancellator. Since Type Ⅰ consumes more energy of the previously detected signals to recover a signal, Type Ⅱ can offer a better performance and simulations demonstrate its validity.

关键词： asynchronous transmission successive interference cancellation (SIC) vertical Bell Labs architecture of layered space-time (V-BLAST)

Determination of Taurine in Biological Samples by High-Performance Liquid Chromatography Using 4-Fluoro-7-Nitrobenzofurazan as a Derivatizing Agent

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Biomedical and Environmental Sciences 2011年第5期24卷 537-542页

作者： WANG XiFeng CHI DeFeng SU GuanMin LI lin shao LiHua Beijing Daxing Center for Disease Control and Prevention Beijing 102600China Department of Hygiene Analytical Chemistry School of Public HealthShandong UniversityJinan 250012ShandongChina

Objective A highly sensitive and rapid high‐performance liquid chromatography method with pre‐column derivatization with 4‐fluoro‐7‐nitrobenzofurazan was developed for determination of taurine in biological samples,including plasma,brain,and *** The optimum derivatization reaction temperature was 70℃,and at this temperature the reaction was complete within 3 *** derivatized taurine was separated using phosphate buffer （0.02 mol/L,pH 6.0）：acetonitrile （84：16,v/v） as the mobile phase at a flow rate of 1.0 mL/min,and a column temperature of 25℃.The taurine derivatives were separated within 20 min （tR：14.5 min） and fluorometrically detected at 530 nm with excitation at 470 *** The intra‐ and the inter‐day coefficients of variation for the method were 5.3% and 7.7%,*** calibration curve was linear from 0.1 μmol/L to 30.0 μmol/L with a correlation coefficient of *** This method can be used to determine the taurine contents in plasma,brain,and liver from normal rats and human plasma.

关键词： Taurine HPLC 4‐fluoro‐7‐nitrobenzofurazan Derivatization

linear Connectivity, Schwarz–Pick Lemma and Univalency Criteria for Planar Harmonic Mapping

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Acta Mathematica Sinica,English Series 2016年第3期32卷 297-308页

作者： shao lin CHEN Saminathan PONNUSAMY Antti RASILA Xian Tao WANG Department of Mathematics and Computational Science Hengyang Normal University Indian Statistical Institute (ISI) Chennai CentreSETS (Society for Electronic Transactions and Security)MGR Knowledge CityCIT Campus Department of Mathematics and Systems Analysis Aalto University Department of Mathematics Shantou University

In this paper, we first establish a Schwarz-Pick lemma for higher-order derivatives of planar harmonic mappings, and apply it to obtain univalency criteria. Then we discuss distortion theorems, Lipschitz continuity an... 详细信息

关键词： Harmonic mapping linearly connected domain Schwarz-Pick lemma a-close-to-convex function John constant univalency

Sulfuric acid leaching of high iron-bearing zinc calcine

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International Journal of Minerals,Metallurgy and Materials 2017年第11期24卷 1211-1216页

作者： Jin-lin Yang Ji-guang Liu Han-xin Xiao shao-jian Ma College of Resources Environment and Materials Guangxi University Nanning 530004 China Ministry-Province Jointly-Constructed Cultivation Base for State Key Laboratory of Processing for Non-ferrous Metal and Featured Materials Guangxi Zhuang Autonomous Region Guangxi University Nanning 530004 China

Sulfuric acid leaching of high iron-bearing zinc calcine was investigated to assess the effects of sulfuric acid concentration, liquid-to-solid ratio, leaching time, leaching temperature, and the stirring speed on the leaching rates of zinc and iron. The results showed that the sulfuric acid concentration, liquid-to-solid ratio, leaching time, and leaching temperature strongly influenced the leaching of zinc and iron, whereas stirring speed had little influence. Zinc was mainly leached and the leaching rate of iron was low when the sulfuric acid concentration was less than 100 g/L. At sulfuric acid concentrations higher than 100 g/L, the leaching rate of iron increased quickly with increasing sulfuric acid concentration. This behavior is attributed to iron-bearing minerals such as zinc ferrite in zinc calcine dissolving at high temperatures and high sulfuric acid concentrations but not at low temperatures and low sulfuric acid concentrations.

关键词： high iron-bearing zinc calcine sulfuric acid leaching zinc ferrite leaching rate