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Ambipolar Transport Compact Models for Two-Dimensional Materials Based Field-Effect Transistors

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Tsinghua Science and Technology 2021年第5期26卷 574-591页

作者： Zhaoyi Yan Guangyang Gou Jie ren Fan Wu Yang Shen He Tian Yi Yang Tian-ling ren the Institute of Microelectronics Tsinghua UniversityBeijing 100084China the Institute of Microelectronics and Tsinghua National Laboratory for Information Science and TechnologyTsinghua UniversityBeijing 100084China

Three main ambipolar compact models for Two-Dimensional(2D)materials based Field-Effect Transistors(2D-FETs)are reviewed:(1)Landauer model,(2)2D Pao-Sah model,and(3)virtual Source Emission-Diffusion(VSED)*** the Landauer model,the Gauss quadrature method is applied,and it summarizes all kinds of variants,exhibiting its *** the 2D Pao-Sah model,the aspects of its theoretical fundamentals are rederived,and the electrostatic potentials of electrons and holes are clarified.A brief development history is compiled for the VSED *** summary,the Landauer model is naturally appropriate for the ballistic transport of short channels,and the 2D Pao-Sah model is applicable to long-channel *** contrast,the VSED model offers a smooth transition between ultimate *** three models cover a fairly completed channel length range,which enables researchers to choose the appropriate compact model for their works.

关键词： Field-Effect Transistor(FET) compact model ambipolar transport Landauer formula Pao-Sah model virtual source

Thermal behavior analysis of a pouch type Li[Ni0.7Co0.15Mn0.15]O2-based lithium-ion battery

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Rare Metals 2016年第4期35卷 309-319页

作者： Feng-ling Yun ling Tang Wen-Cheng Li Wei-ren Jin Jing Pang Shi-Gang Lu General Research Institute for Nonferrous Metalsl R&D Center for Vehicle Battery and Energy StorageBeijing 100088China

Since lithium-ion battery with high energy density is the key component for next-generation electrical vehicles, a full understanding of its thermal behaviors at different discharge rates is quite important for the design and thermal management of lithium-ion batteries （LIBs） pack/module. In this work, a 25 Ah pouch type Li[Ni0.7 Co0.15Mn0.15]O2/graphite LIBs with specific energy of 200 ***-1 were designed to investigate their thermal behaviors, including temperature distribution, heat generation rate, heat capacity and heat transfer coefficient with environment. Results show that the temperature increment of the charged pouch batteries strongly depends on the discharge rate and depth of discharge. The heat generation rate is mainly influenced by the irreversible heat effect, while the reversible heat is important at all discharge rates and contributes much to the middle evolution of the tem- perature during discharge, especially at low rate. Subse- quently, a prediction model with lumped parameters was used to estimate the temperature evolution at different discharge rates of LIBs. The predicted results match well with the experimental results at all discharge rates. Therefore, the thermal model is suitable to predict the average temperature for the large-scale batteries under normal operating conditions.

关键词： Lithium-ionLi[Ni0.7Co0.15Mn0.15]O2 battery Thermal behavior High specific energy

Research　on　probability　of　seismic　critical　instability　on　basis　of''fracture　collusion''　model

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Acta Seismologica Sinica(English Edition) 1998年第4期11卷 473-478页

作者： Shi-Yong Zhou ling-ren Zhu Man-Da Wang Seismological Bureau of Xinjiang Uygur Autonomous Region Urumqi China Doctorate student of Institute of Geophysics China Seismological Bureau China Institute of Geophysics State Seismological Bureau Beijing China

Ｒｅｓｅａｒｃｈｏｎｐｒｏｂａｂｉｌｉｔｙｏｆｓｅｉｓｍｉｃｃｒｉｔｉｃａｌｉｎｓｔａｂｉｌｉｔｙｏｎｂａｓｉｓｏｆ＇＇ｆｒａｃｔｕｒｅｃｏｌｌｕｓｉｏｎ＇＇ｍｏｄｅｌＳＨＩ－ＹＯＮＧＺＨＯＵ１）（周仕勇），ＬＩＮＧ... 详细信息

Ｒｅｓｅａｒｃｈｏｎｐｒｏｂａｂｉｌｉｔｙｏｆｓｅｉｓｍｉｃｃｒｉｔｉｃａｌｉｎｓｔａｂｉｌｉｔｙｏｎｂａｓｉｓｏｆ＇＇ｆｒａｃｔｕｒｅｃｏｌｌｕｓｉｏｎ＇＇ｍｏｄｅｌＳＨＩ－ＹＯＮＧＺＨＯＵ１）（周仕勇），ＬＩＮＧ－ＲＥＮＺＨＵ１）（朱令人），ＭＡ...

关键词： Fracture penetration Probability of critical instability renormalization relationship

Effects of continuous and pulse irrigation with different nitrogen applications on soil moisture,nitrogen transport and accumulation in root systems

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International Journal of Agricultural and Biological Engineering 2018年第5期11卷 139-149页

作者： lingmiao Huang Peiling Yang Shumei ren Haobo cui College of Water Resources and Civil Engineering China Agricultural UniversityBeijing 100083China

Pulse and continuous irrigation can affect water distribution in the soil,thereby affecting the growth and distribution of root *** base and topdressing fertilizers can affect nitrogen transport in the soil and root distribution,thus affecting root water and nitrogen *** study used pot experiments to set up four different nitrogen levels,including two different irrigation methods,to research the effects of soil moisture,nitrogen transport,nitrogen accumulation and root systems under the conditions of continuous and pulse irrigation,as well as different nitrogen *** showed that continuous irrigation can increase the moisture content around the drip emitter position and reduce the soil moisture content in the horizontal spreading compared with pulse irrigation,especially reducing the horizontal spreading in the deep soil *** treatment in this study did not apply base fertilizer,and then supply topdressing fertilizer at a ratio of 2:4:4 in the seedling stage,jointing stage and tasseling stage,*** treatment is beneficial for improving nitrogen utilization ***,this treatment can increase the root length density and root surface area in the deep soil layers,especially in the 20-35 cm soil depth,and to some extent increase the deep growth of the root system.

关键词： pulse irrigation continuous irrigation fertilization irrigation soil

Effects of the expressway on the soil-plant systems in the Longitudinal Range-Gorge Region

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Chinese Science Bulletin 2007年第A2期52卷 203-212页

作者： ZHAO Hui cui BaoShan BAI JunHong ren HuaLi State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Beijing Normal University Beijing 100875 China

作为一个例子在纵的范围峡区域( LRGR )拿 Da-Bao 高速公路，沿着道路的三种土壤植物系统上的高速公路的效果被索引的七种类型分析，它是土壤营养素，土壤的重金属，土壤潮湿和土壤的 pH ，种植物和植物差异的滋养的、重金属。通过比较... 详细信息

作为一个例子在纵的范围峡区域( LRGR )拿 Da-Bao 高速公路，沿着道路的三种土壤植物系统上的高速公路的效果被索引的七种类型分析，它是土壤营养素，土壤的重金属，土壤潮湿和土壤的 pH ，种植物和植物差异的滋养的、重金属。通过比较典型采样点和他们的通过对比区别的点，第一，单个索引上的高速公路的效果被分析并且讨论；第二，在高速公路之中的相互作用和各种索引与关联词分析被讨论；最后，三个系统上的效果的范围和紧张与灰色的相关分析被分析。所有结果显示出那 1 ) 在由高速公路的效果的范围以内，所有索引的表示的形式对高速公路的干扰不同。2 ) 高速公路能引起 HMS 和 HMP 的累积，特别在农田系统；并且带土壤的一点碱性化，特别在灌木系统。3 ) 高速公路是森林和灌木里的 HMS， SM， HMP 和 PD 的最重要的影响因素在农田系统的系统，而是仅仅 HMS 和 HMP。到与道路的不足道的关联的索引，高速公路通过系统的效果链间接地工作。与三种土壤植物系统作比较，效果主要在森林和农田系统里从高速公路专注于 10 m 的区域，并且在灌木系统上的 30 m 的区域上。

关键词：土壤植被纵向岭谷区生态系统高速公路

Effects of different concentrations of nicotinamide on hematopoietic stem cells cultured in vitro

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World Journal of Stem Cells 2024年第2期16卷 163-175页

作者： Yan ren Yan-Ni cui Hong-Wei Wang The Second Clinical Medical College Shanxi Medical UniversityTaiyuan 030001Shanxi ProvinceChina Department of Hematology The Second Hospital of Shanxi Medical UniversityTaiyuan 030001Shanxi ProvinceChina Department of Hematology Key Laboratory of Molecular Diagnosis and Treatment of Blood Diseases in Shanxi ProvinceTaiyuan 030001Shanxi ProvinceChina

BACKGROUND In vitro expansion to increase numbers of hematopoietic stem cells(HSCs)in cord blood could improve clinical efficacy of this vital ***(NAM)can promote HSC expansion ex vivo,but its effect on hematopoietic stem and progenitor cells(HSPCs,CD34^(+)CD38)and functional subtypes of HSCs-shortterm repopulating HSCs(ST-HSCs,CD34^(+)CD38CD45RACD49f^(+))and long-term repopulating HSCs(LT-HSCs,CD34^(+)CD38CD45RACD49f^(+)CD90^(+))is not yet *** a sirtuin 1(SIRT1)inhibitor,NAM participates in regulating cell adhesion,polarity,migration,proliferation,and ***,SIRT1 exhibits dual effects by promoting or inhibiting differentiation in different tissues or *** propose that the concentration of NAM may influence proliferation,differentiation,and SIRT1 signaling of *** To evaluate the effects and underlying mechanisms of action of different concentrations of NAM on HSC proliferation and *** CD34^(+)cells were purified from umbilical cord blood using MacsCD34 beads,and cultured for 10-12 d in a serum-free medium supplemented with cytokines,with different concentrations of NAM added according to experimental *** cytometry was used to detect phenotype,cell cycle distribution,and apoptosis of the cultured ***-time polymerase chain reaction was used to detect the transcription levels of target genes encoding stemness-related factors,che mokines,components of hypoxia pathways,and antioxidant ***-dihydro-fluorescein diacetate probes were used to evaluate intracellular production of reactive oxygen species(ROS).Determination of the effect of different culture conditions on the balance of cytokine by cytometric bead *** Compared with the control group,the proportion and expansion folds of HSPCs(CD34^(+)CD38)incubated with 5 mmol/L or 10 mmol/L NAM were significantly increased(all P<0.05).The ST-HSCs ratio and fold expansion of the 5 mmol/L NAM group were significantly

关键词： Hematopoietic stem cells Nicotinamide Concentration Proliferation Differentiation Sirtuin 1

Magnetoresistive behavior and magnetization reversal of NiFe/Cu/CoFe/IrMn spin valve GMRs in nanoscale

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International Journal of Minerals,Metallurgy and Materials 2013年第7期20卷 700-704页

作者： Cong Yin Ze Jia Wei-chao Ma Tian-ling ren Institute of Microelectronics & Tsinghua National Laboratory for Information Science and Technology Tsinghua University

The magnetoresistance behavior and the magnetization reversal mode of NiFe/Cu/CoFe/IrMn spin valve giant magnetoresistance （SV-GMR） in nanoscale were investigated experimentally and theoretically by nanosized magnetic simulation methods. Based on the Landau-Lifshitz-Gilbert equation, a model with a special gridding was proposed to calculate the giant magnetoresistance ratio （MR） and investigate the magnetization reversal mode. The relationship between MR and the external magnetic field was obtained and analyzed. Studies into the variation of the magnetization distribution reveal that the magnetization reversal mode, that is, the jump variation mode for NiFe/Cu/CoFe/IrMn, depends greatly on the antiferromagnetic coupling behavior between the pinned layer and the antiferromagnetic layer. It is also found that the switching field is almost linear with the exchange coefficient.

关键词： giant magnetoresistance (GMR) spin valves nanoscale magnetization reversal

Method of analyzing vibration characteristics of armature system of hermetically sealed electromagnetic relay

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第3期8卷 434-438页

作者： ren Wan-bin cui Li LUO Fu-biao ZHAI Guo-fu School of Electrical Engineering and Automation Harbin Institute qf Technology Harbin 150001 China Guilin Aerospace Electronics Company Guilin 541002 China

Published research is minimal on vibration characteristics of hermetically sealed electromagnetic relay (EMR) ex- posed to mechanical environment. The vibration characteristics of armature system, link contact system with electromagnetic system will cause EMR malfunction. The nonlinear dynamics model of armature systems was studied by considering electro- magnetic attraction force and opposite mechanical force in this paper. Angular displacements of armature under different sinu- soidal vibration conditions are solved in order to obtain the failure mode result from armature system. Vibration tests showed the presented analyzing method is suitable for EMR. The conclusions are instructive for increasing vibration resistance of armature systems of EMR, and are significant for reliability design of switch apparatus.

关键词： Hermetically sealed electromagnetic relay (EMR) Armature system Vibration characteristics Analyzing method

Synthesis of methyl methacrylate star-branched polymer with divinylbenzene as a linking agent via controlled/living photopolymerization

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Chinese Chemical Letters 2012年第8期23卷 985-988页

作者： Yan Yan cui Ya E ren Xiao Xuan Liu Department of Polymer Materials and Engineering Faculty of Materials and EnergyGuangdong University of TechnologyGuangzhou 510006China

HTEMPO-functionalized central cores were formed with divinylbenzene in ＇＇core first＇＇ method,and the four or five arms star polymers were built via controlled/living free radical *** four arms star polymers were also prepared with controlled/living free radical photopolymerization in ＇＇arm first＇＇ *** resulting polymers had been confirmed by GPC and 1 H *** showed that the star polymers had low polydispersities and molecular weight（M n） with the 85,000-560,000 g/mol range.

关键词： Controlled/living photopolymerization H-TEMPO Star polymers DVB MMA