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The Stress-strain Analysis for the Linearly Elastic and Power Hardening of Strength Difference Plane Structure of Bars Jointed to a Rigid-body

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上海交通大学学报 2004年第Z2期38卷 38-41页

作者： Liu Xiequan Ni xinhua zhao Jianjun Shijiazhuang Mechanical Engineering College Shijiazhuang050003 China Shijiazhuang Mechanical Engineering College Shijiazhuang050003 China Shijiazhuang Mechanical Engineering College Shijiazhuang050003 China

The plane structure of bars jointed to a rigid-body is a complex and universal *** other structure of bars can be considered as its special cases. Many material have different stress-strain relation in tension and compression, generally the relation is nonlinear. In this paper,we use the constitutive model of linearly elastic and power hardening of strength difference to analyze plane structure of bars. The displacement method is used to derive the universal expression of calculating stress and strain. The nonlinear equations for computing displacements of the rigid-body has been given and general computing program has been worked out. This problem has been solved satisfactorily.

关键词： strength-difference linearly elastic power hardening the plane structure of bars stress strain

Primary study of the isothermal phase diagram of the Cu_2O-Al_2O_3-SiO_2 ternary system at 1150℃ in air

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Rare Metals 2007年第5期26卷 515-520页

作者： XIAO Qiuguo zhao xinhua HUANG Ling DENG Xuebin Department of Chemistry Beijing Normal University Beijing 100875 China College of Chemistry and Chemical Engineering Hunan University of Science and Technology Xiangtan 411201 China

The isothermal phase diagram of the Cu2O-Al2O3-SiO2 ternary system at 1150℃ was reported for the samples which were prepared from sol-gel method and quenched by water after being heated at 1150℃ for 12 h. Based on the conventional X-ray powder diffraction （XRD） and in situ high-temperature XRD quantitative analysis,in addition to scanning electron microscopy measurement,the phase identification was achieved. Combining the deduction from the component phase diagrams of the binary systems using the phase equilibrium theorem,the primary isothermal phase diagram was plotted over the composition area Cu2O-mullite-SiO2. In this area,the approximate composition areas of two two-phase regions and one three-phase region,（L2＋Cr）,（L2＋M）,and （L1＋L2＋Tr）,were determined. Moreover,the precise composition areas of both of the three-phase regions （L2＋Cr＋M） and （L2＋M＋A） were determined according to the results of conventional and in situ high-temperature XRD quantitative analysis by Rietveld method.

关键词： material experiment isothermal phase diagram X-ray diffraction Cu2O-Al2O3-SiO2 system

Assessment and management of the performance risk of a pilot reclaimed water disinfection process

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Journal of Environmental Sciences 2013年第10期25卷 1992-2002页

作者： Guangyu Zhou xinhua zhao Lei Zhang Qing Wu School of Environmental Science and Engineering Tianjin University

Chlorination disinfection has been widely used in reclaimed water treatment plants to ensure water quality. In order to assess the downstream quality risk of a running reclaimed water disinfection process, a set of dynamic equations was developed to simulate reactions in the disinfection process concerning variables of bacteria, chemical oxygen demand （COD）, ammonia and monochloramine. The model was calibrated by the observations obtained from a pilot disinfection process which was designed to simulate the actual process in a reclaimed water treatment plant. A Monte Carlo algorithm was applied to calculate the predictive effluent quality distributions that were used in the established hierarchical assessment system for the downstream quality risk, and the key factors affecting the downstream quality risk were defined using the Regional Sensitivity Analysis method. The results showed that the seasonal upstream quality variation caused considerable downstream quality risk; the effluent ammonia was significantly influenced by its upstream concentration; the upstream COD was a key factor determining the process effluent risk of bacterial, COD and residual disinfectant indexes; and lower COD and ammonia concentrations in the infiuent would mean better downstream quality.

关键词： reclaimed water disinfection process risk assessment and management

Effect of SEN structure on the mold level fluctuation and heat transfer for a medium thin slab caster

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Journal of University of Science and Technology Beijing 2008年第2期15卷 120-124页

作者： Heming zhao xinhua Wang Jiongming Zhang Wanjun Wang School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing 100083 China

It is important to select suitable parameters of a submerged entry nozzle （SEN） for optimizing the flow and temperature patterns in a mold. The effect of SEN design on the mould level stability, meniscus steel flow velocity, and heat transfer of the mold of a medium thin slab caster was studied by means of 1：1 water modeling and industrial testing. The advantages of a 2-port SEN compared with a 3-port SEN are the following： more optimal flow patterns with a lower mold level fluctuation and a lower meniscus steel flow velocity; proper powder consumption without slag bears due to a reasonable liquid powder thickness. The argon flow rate can be reduced and the mold average heat flux and temperature near the edges of the copper plate are reduced. At a casting speed of 2.5 m·min^-1, the mold level fluctuation lies within ＋5 mm. In addition, soft cooling of the steel shell in the mold is realized, which is suitable for casting crack susceptible steel grades.

关键词： submerged entry nozzle mold level fluctuation heat transfer water model

Novel copyright protection scheme for digital content

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Journal of Systems Engineering and Electronics 2006年第2期17卷 423-429页

作者： Fan Kefeng Wang Meihua Mo Wei zhao xinhua Inst. of Information Processing Xidian Univ. Xi'an 710071 P R. China Open Lab of TRS Beijing Information Technology Inst. Belling 100101 P. R. China China Electronics Standardization Inst. Beijing 100007 P.R. China

A novel copyright protection scheme for digital content is presented, which is a private watermarking scheme based on the watermark embedding in the DCT domain and watermark extraction Using independent component analysis （ICA）. The system includes the key for watermark extraction and the host image. The algorithm splits the original image into blocks and classifies these blocks based on visual masking, that is, noise visibility function （NVF）. Watermark components with different strength are inserted into chosen direct current components of DCT coefficients according to the classifier. The watermark extraction is based on the characteristic of the statistic independence of the host image, watermark and key. Principle component analysis （PCA） whitening process and FastICA techniques are introduced to ensure a blind watermark extraction without requiring the original image. Experirnental results show the proposed technique is robust under attacks such as image filtering and adding noise, cropping and resizing. In addition, the proposed private watermarking system can be improved to the application of the DTV content protection system.

关键词： digital content copyright protection digital watermarking noise visibility function independent component analysis.

Advance of Interplanetary Physics Study in China:2008-2010

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空间科学学报 2010年第5期30卷 427-444页

作者： zhao xinhua Xiang Changqing State Key Laboratory of Space Weather Center for Space Science and Applied Research Chinese Academy of Sciences Beijing 100190

Interplanetary physics study is an important ingredient in space weather *** progress this aspect has been achieved by the space physics community of China in recent *** brief report summarizes the latest advances of the interplanetary physics research in China during the period of *** report includes solar corona and solar wind,interplanetary transients,energetic particles,MHD simulation,space plasma,and prediction methods for physical phenomena originating from both solar corona and interplanetary space.

关键词：行星际空间空间物理学中国空间等离子体太阳日冕组成部分空间天气高能粒子

Progress of Solar Corona Study in China

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空间科学学报 2008年第5期28卷 426-443页

作者： zhao xinhua SONG wenbin State Key Laboratory for Space Weather Center for Space Science and Applied Research Chinese Academy of Sciences Beijing 100190

Solar corona study is an important aspect of space weather *** recent years,great achievements have been acquired on the solar corona study by the space physics group of *** paper gives a brief outline of these progresses that have been made during 2006—*** kind of research includes observational study of the corona,theoretical investigations,statistical analysis based on a large number of data sets,numerical method for MHD modeling,numerical study of space weather events,and prediction methods for the complicated processes originating from the solar *** is given as a separate part in the following.

关键词：中国太阳气候天气研究进展

Study of Solar Corona in China

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空间科学学报 2006年第Z1期26卷 79-89页

作者： FENG Xueshang zhao xinhua State Key Laboratory for Space Weather Center for Space Science and Applied Research Chinese Academy of Sciences Beijing 100080 China State Key Laboratory for Space Weather Center for Space Science and Applied Research Chinese Academy of Sciences Beijing 100080 China

Considerable progress for the study of solar corona physics has been achieved by China's space physics community. It involves the theoretical study of coronal process of solar active phenomena, solar wind origin, acceleration of solar wind and coronal mass ejections, observational and numerical study of these problems and prediction methods of solar eruptive activities (such as flares/CMEs). Here is a brief summary of the progress in this area. Main progress is put upon the following three topics: corona and solar wind, numerical method, prediction method.

关键词： Corona and solar wind, Numerical method, Prediction method

Research Progress of Solar Corona and Interplanetary Physics in China:2010—2012

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空间科学学报 2012年第5期32卷 618-646页

作者： zhao xinhua XIANG Changqing State Key Laboratory of Space Weather Center for Space Science and Applied ResearchChinese Academy of SciencesBeijing 100190

The scientific objective of solar corona and interplanetary research is the understanding of the various phenomena related to solar activities and their effects on the space environments of the *** progress has been made in the study of solar corona and interplanetary physics by the Chinese space physics community during the past *** paper will give a brief report about the latest progress of the corona and interplanetary research in China during the years of *** paper can be divided into the following parts:solar corona and solar ***, magnetic reconnection,energetic particles,space plasma,space weather numerical modeling by 3D SIP-CESE MHD model,space weather prediction methods,and proposed *** constitute the abundant content of study for the complicated phenomena that originate from the solar corona,propagate in interplanetary space,and produce geomagnetic *** these progresses are acquired by the Chinese space physicists,either independently or through international collaborations.

关键词： Solar wind Coronal Mass Ejection(CME) Interplanetary transients Space weather