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Depth Determination of an Abnormal Heat Source in Biological Tissues

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Chinese Physics Letters 2011年第11期28卷 268-270页

作者： WANG Qing-hua li zhen-hua LAI Jian-Cheng HE An-Zhi Department of Information Physics and Engineering Nanjing University of Science and TechnologyNanjing 210094

We deduce the surface temperature distribution generated by the inner point heat source in biological tissues and propose a graphic method to retrieve the depth of the point heat *** practical surface temperature distribution can be regarded as the convolution of the temperature distribution of the inner point heat source with the heat source shape *** depth of an abnormal heat source in biological tissues can be retrieved by using the graphic method combined with the blind deconvolution scheme.

关键词： distribution source Determination

Study on “triangle” water-inrush mode of strong water-guide collapse column

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Journal of Central South University 2016年第9期23卷 2402-2409页

作者： li zhen-hua FENG Guo-rui ZHAI Chang-zhi School of Energy Science ＆ Engineering Henan Polytechnic University Jiaozuo 454000 China College of Mining Technology Taiyuan University of Technology Taiyuan 030024 China

The water-inrush mechanism of strong water-guide collapse column in coal seam is studied based on the establishment of geological and mathematical models of "triangle" water-inrush mode. The geological background of Shuangliu mine is considered a prototype, similar simulation tests are adopted to analyze the water-inrush rules under this model, and the formation of water-guide channel and water-inrush process is investigated by examining the changes in rock resistivity. This work also uses the coupled cloud image derived from numerical simulation software to verify the results of simulation test. Results show that the numerical simulation of "triangle" water-inrush mode is consistent with the similar simulation. The "triangle" seepage area, which is located at the bottom of collapse columns and is connected to aquifer, is caused by the altered seepage direction and strengthened seepage actions after the overlapping of hydraulic transverse seepage in collapse column and hydraulic vertical seepage flow in aquifer. Under "triangle"water-inrush model, water-guide channel is formed by the communication between plastic failure zone of working face baseplate and"triangular" seepage area. Accordingly, the threatening water-inrush distance between working face and collapse column increases by 20 m compared with that of theoretical calculation.

关键词： strong water-guide collapse column "triangle" water-inrush mode similar simulation numerical simulation seepage

Local magnetic moment oscillation around an Anderson impurity on graphene

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 192-201页

作者： Shuai li zhen Ma Jin-hua Gao School of Science Hebei University of Science and Technology School of Electronics and Information Zhengzhou University of Light Industry School of Physics and Wuhan National High Magnetic Field Center Huazhong University of Science and Technology

We theoretically investigate the spin resolved Friedel oscillation （FO） and quasiparticle interference （QPI） in graphene induced by an Anderson *** the impurity becomes magnetic,the resulted FO becomes spin dependent,which gives rise to a local magnetic moment oscillation with an envelop decaying as r-2in real space in the doping ***,at half filling,the electron density and local magnetic moment will not oscillate but decay as *** spin resolved FO has both sublattice and spin ***,the local magnetic moment decay at half filling only occurs at one sublattice of graphene,which is quite like the phenomenon observed in the STM experiment (***ález-Herrero et al.,Science 352,437 （2016）).We further give an analytic formula about such spin dependent FO based on the stationary phase ***,we study the interference of quasiparticles around the magnetic impurity by calculating the spin dependent Fourier-transformed local density of states （FT-LDOS）.Our work gives a comprehensive understanding about the local magnetic moment oscillation around an Anderson impurity on graphene.

关键词： Friedel oscillation local magnetic moment graphene Anderson impurity

A Preparation Model of Chinese Medicine Decoction Placebo

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Chinese Journal of Integrative Medicine 2017年第8期23卷 631-634页

作者： BIAN li-qun li Bao-shuang li zhen-hua WANG Feng-yun WEN Yan-dong TANG Xu-dong Department of Gastroenterology Xiyuan Hospital China Academy of Chinese Medical Sciences Beijing 100091 China

Chinese medicine（CM）decoction placebo is one of the key factors restricting the placebo-controlled clinical trial of *** this article,based on the analysis of the difficulties in preparing CM placebo,the production requirements for placebo were put ***,in accordance with clinical practices,a production method and evaluation process of CM decoction placebo was proposed,to provide a reference for clinical research.

关键词： placebo decoction Chinese medicine preparation model

Topological Charge Conversion with Spiral-Slit Screens

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Chinese Physics Letters 2013年第10期30卷 108-111页

作者： li zhen-hua ZHANG Mei-Na li Xing liU Chun-Xiang CHENG Chuan-Fu College of Physics and Electronics Shandong Normal UniversityJinan 250014

We propose a method of converting the topological charge(TC)of an incident vortex light wave with spiral-slit *** phase in the incident vortex beam is redistributed via the optical path adjustment realized by changing the in-plane radial distance of the spiral *** numerically calculate the light field with Fresnel diffraction theory,and find the expected TC conversion on the observation *** calculations also show that screens of pinholes distributed in a spiral curve can be used for the implementation instead of spiral *** method can also be used to distinguish the TCs of the incident vortices by reading the diffracted intensity patterns.

关键词： incident vortex topological

Simulation of the regional climatic effect of irrigation over the Yellow River Basin

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Atmospheric and Oceanic Science Letters 2017年第4期10卷 291-297页

作者： CHEN liang MA Zhu-Guo ZHAO Tian-Bao li zhen-hua li Yan-Ping CAS Key Laboratory of Regional Climate-Environment for Temperate East Asia Institute of Atmospheric Physics Chinese Academy of Sciences Global Institute for Water Security University of Saskatchewan

In this study, the authors developed a new irrigation scheme based on the Noah land surface model, and then coupled it with the Weather Research and Forecasting regional climate model. Two simulations （with and without irrigation） were conducted over the Yellow River basin for the period April to October 2000-2010. The results indicated that the WRF model is able to successfully capture the spatial pattern and seasonal changes in observed temperature and precipitation over the Yellow River basin. When irrigation was induced, the mean surface air temperature at 2 m （T2m） decreased by 0.1-0.4 K, and there was a correspond increase （decrease） in latent （sensible） heat flux over the irrigated areas, wherein the increase （decrease） reached more than 10 W m-2 over the largest irrigated areas. The cooling effect was consistent with the changes in evapotranspiration and heat fluxes due to *** changes in lifting condensation level and planetary boundary layer height led to a greater probability of cloud formation and bore a close association with surface fluxes and soil moisture, which then impacted the spatial distribution of T2rn and precipitation.

关键词： Irrigation WRF regionalclimate

Chahine algorithm to invert light scattering spectroscopy of epithelial dysplasia

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Optoelectronics Letters 2007年第5期3卷 397-400页

作者： WANG Qing-hua li zhen-hua LAI Jian-cheng HE An-zhi Department of Information Physics and Engineering Nanjing University of Science and Technology Nanjing 210094China

To perceive the epithelial dysplasia from the light scattering spectroscopy (LSS) is an inverse problem, which can be transformed into the inversion of the size distribution of epithelial-cell nuclei. Based on the simulation of single polarized LSS for epithelial-cell nuclei, Chahine algorithm is adopted to retrieve the size distribution. Numerical results show that Chahine algorithm has high inversion precision for both single-peaked and bimodal models, which implies the potential to increase diagnostic resolution of LSS.

关键词：激光技术医疗应用光散射上皮发育异常

Experimental study on the variation law of coal temperature during excavation in coal mines

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Journal of Coal Science & Engineering(China) 2013年第2期19卷 133-135页

作者： Yi-Shan PAN lian-Man XU Zhong-hua li Guo-zhen li School of Mechanics and Engineering Liaoning Technical University Fuxin 123000 China

By testing the temperature of the coal and the stress of the working surface, we got the variation law of coal temperature and coal stress during the excavation. The result shows that the activities of mining affect the coal temperature, the fluctuation of coal temperature and the coal stress is synchronous. During the smooth change of crustal stress, the coal temperature basically keeps unchanged, when the dynamic phenomenon appears, the coal temperature changes, as well the coal stress. Therefore, we can use the online coal temperature monitoring system to test the coal temperature of the working surface continuously, and it can provide basic information for forecasting coal mine power disaster before it happens.

关键词： coal temperature coal stress coal fracturing gas desorption

The Multi-Scale and the Multi-Fractality Properties of Speckles on Rough Screen Surfaces

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Chinese Physics Letters 2013年第4期30卷 105-109页

作者： ZHANG Mei-Na li zhen-hua CHEN Xiao-Yi liU Chun-Xiang TENG Shu-Yun CHENG Chuan-Fu College of Physics and Electronics Shandong Normal UniversityJinan 250014 School of Physics and Technology University of JinanJinan 250022

With a microscopic imaging system composed of microscopic objective,lens and CCD,we observe the complicated structures in the speckle fields on the surface of a rough *** is found that such structures contain ridge stripes,large platform-like grains,and shivy grains,exhibiting multiple scales in size and multiple *** shows these structures are formed by different parts of the rough *** experimental curve of the autocorrelation function of the speckle intensity includes the three parts of the central peak,the transition part and the long tail *** the sum of self-affine fractal models with different scales and fractalities,we propose theoretically a triple-scale autocorrelation function to describe the speckle *** of this autocorrelation function to the experimental curve gives the values of such parameters as average speckle sizes and fractalities in different scales of the speckle structures.

关键词： surface. field. speckle