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法官自由裁量权相关问题探讨

理论前沿 2006年第13期 23-24页

作者：彭彤哈尔滨职业技术学院法律系

本文分析总结了我国审判实践中法官行使自由裁量权存在的问题,提出了规范法官自由裁量权的途径。

关键词：自由裁量权相关问题探讨

Amphoteric Supramolecular Nanofiber Separator for High-Performance Sodium-Ion Batteries

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Energy & Environmental Materials 2024年第5期7卷 118-125页

作者： Yuping Zhang Hongzhi Zheng Xing tong Hao Zhuo Wu Yang Yuling Chen Ge Shi Zehong Chen Linxin Zhong Xinwen peng State Key Laboratory of Pulp and Paper Engineering South China University of Technology Department of Chemistry UBC Faculty of Science Vancouver Campus Department of Mechanical Engineering National University of Singapore

The separator is an essential component of sodium-ion batteries （SIBs） to determine their electrochemical performances. However, the separator with high mechanical strength, good electrolyte wettability and excellent electrochemical performance remains an open challenge. Herein, a new separator consisting of amphoteric nanofibers with abundant functional groups was fabricated through supramolecular assembly of natural polymers for SIB. The uniform nanoporous structure, remarkable mechanical properties and abundant functional groups （e.g.-COOH,-NH2and-OH）endow the separator with lower dissolution activation energy and higher ion migration numbers. These metrics enable the separator to lower the barrier for desolvation of Na+, accelerate the migration of Na+, and generate more stable solid electrolyte interphase （SEI） and cathode electrolyte interphase（CEI）. The battery assembled with the amphoteric nanofiber separator shows higher specific capacity and better stability than that assembled with glass fiber （GF） separator.

关键词： amphoteric nanofiber self-assembly Separator sodium-ion batteries

To improve robustness of mechanical properties of semi-solid cast A356 alloy using taguchi design method

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China Foundry 2024年第2期21卷 175-184页

作者： Yi-wu Xu Hong-yi Zhan Wei tong Jin-ping Li Le-peng Zhang De-jiang Li Xiao-qin Zeng School of Materials Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China China Science Lab General Motors Global Research&DevelopmentShanghai 201206China General Motors(China)Investment Co. Ltd.Shanghai 201206China China International Intellectech Corporation(CIIC) Beijing 100004China

Mechanical properties of semi-solid casting are dependent on multiple processing parameters,and improper processing parameters will not only reduce mean data but also increase *** present study investigated the impact of parameters in slurry preparation and heat treatment on the yield strength and ductility of T6 heat-treated A356 Al-Si alloy using rapid slurry forming(RSF)semi-solid *** focus was primarily on the robustness of mechanical properties based on Taguchi design *** analyzing signal-to-noise ratio and minimum value calculated from-3S,the optimum slurry preparation parameters and heat treatment parameters were determined to be no quench,enthalpy exchange material(EEM)temperature of 140℃,EEM-to-melt ratio of 6mass%,stirring time of 18 s,solution heat treated at 520℃ for 2 h,and ageing heat treated at 190℃ for 6 *** a small batch validation,the-3S yield strength and-3S elongation reach 256.1 MPa and 5.03% respectively,showing a satisfactory *** hardness and microstructure of heat-treated samples with the best and worst properties were characterized to gain insight into the underlying mechanisms affecting the mean value and variations of mechanical properties.

关键词： semi-solid casting taguchi design method signal-to-noise ratio mechanical property microstructure

以TiO_2粉体为钛源水热合成Pb(Zr_(0.52)Ti_(0.48))O_3晶粒机理

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人工晶体学报 2005年第6期34卷 1092-1095页

作者：李涛彭同江西南科技大学工程技术中心绵阳621010

用水热法合成了Pb(Zr0.52Ti0.48)O3(PZT)超细晶粒。通过对合成粉晶体的物相与晶体形貌的表征和对生成物中TiO2残余量的测定,初步分析了PZT粉晶粒形成的机理。在反应初期,随着温度的升高,TiO2粒子逐渐溶解。进入溶液的钛氧基团与溶液中... 详细信息

用水热法合成了Pb(Zr0.52Ti0.48)O3(PZT)超细晶粒。通过对合成粉晶体的物相与晶体形貌的表征和对生成物中TiO2残余量的测定,初步分析了PZT粉晶粒形成的机理。在反应初期,随着温度的升高,TiO2粒子逐渐溶解。进入溶液的钛氧基团与溶液中的羟基相作用发生羟基化反应,形成钛的氢氧化物。钛与锆的氢氧化物相互作用,形成生长基元,它们与Pb2+离子一起在PZT晶核生长界面上叠合、脱水、结晶,从而使PZT晶粒长大。

关键词：无机非金属材料 Pb(Zr0.52Ti0.48)O3 水热法二氧化钛形成机理

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不同通勤模式暴露于VOCs的健康风险评价

环境科学 2018年第2期39卷 663-671页

作者：佟瑞鹏张磊中国矿业大学(北京)资源与安全工程学院北京100083

针对国内外交通微环境VOCs健康风险研究中通勤模式和有害挥发物较为单一的不足,选取广州市家庭轿车、空调公共汽车、非空调公共汽车、地铁和自行车这5种通勤模式中的苯、甲苯、二甲苯、乙苯、苯乙烯、甲醛、乙醛和丙烯醛等8种VOCs,运用M... 详细信息

针对国内外交通微环境VOCs健康风险研究中通勤模式和有害挥发物较为单一的不足,选取广州市家庭轿车、空调公共汽车、非空调公共汽车、地铁和自行车这5种通勤模式中的苯、甲苯、二甲苯、乙苯、苯乙烯、甲醛、乙醛和丙烯醛等8种VOCs,运用Monte-Carlo模拟方法,进行健康风险评价并对各吸入暴露参数做出敏感性分析.结果表明,空调公交车和家庭轿车的致癌风险较大,分别服从t分布和对数正态分布,为1.65×10^(-5)±5.74×10^(-9)和5.01×10^(-6)±3.56×10^(-11),超过10^(-6)的概率分别为97%和74.85%,自行车和非空调公交车次之,地铁的致癌风险最小,但平均值皆超过10^(-6);家庭轿车和空调公共汽车的非致癌风险较大,服从对数正态分布,分别为2.51±2.74和1.20±1.36,其中丙烯醛的贡献皆在80%以上,骑自行车的非致癌风险较小,预期将不会对人体健康产生威胁;各暴露参数中,对健康风险敏感度较大的依次为:每天的暴露时间(ET)、有害挥发物的浓度(CA)、终生暴露年限(ED)、呼吸速率(IR)和每年的暴露天数(EF),而体重(BW)具有负敏感性.

关键词： VOCs 交通微环境通勤模式健康风险 Monte-Carlo模拟方法

Anomalous low-temperature heat capacity in antiperovskite compounds

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Chinese Physics B 2017年第2期26卷 370-374页

作者： Xin-Ge Guo[l,2] Jian-Chao Lin peng tong Shuai Lin Cheng Yang Wen-Jian Lu Wen-Hai Song Yu-Ping Sun Key Laboratory of Materials Physics Institute of Solid State Physics Chinese Academy of Sciences Hefei 230031 China University of Science and Technology of China Hefei 230026 China High Magnetic FieM Laboratory Chinese Academy of Sciences Hefei 230031 China Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210093 China

The low-temperature heat capacities are studied for antiperovskite compounds AX M_3（A = Al, Ga, Cu, Ag, Sn, X = C,N, M = Mn, Fe, Co）. A large peak in（C- γ T）/T^3 versus T is observed for each of a total of 18 compounds investigated,indicating an existence of low-energy phonon mode unexpected by Debye T^3 law. Such a peak is insensitive to the external magnetic field up to 80 k Oe（1 Oe = 79.5775 A·m-1）. For compounds with smaller lattice constant, the peak shifts towards higher temperatures with a reduction of peak height. This abnormal peak in（C- γ T）/T^3 versus T of antiperovskite compound may result from the strongly dispersive acoustic branch due to the heavier A atoms and the optical-like mode from the dynamic rotation of X M_6 octahedron. Such a low-energy phonon mode may not contribute negatively to the normal thermal expansion in AX M_3 compounds, while it is usually concomitant with negative thermal expansion in open-structure material（e.g., ZrW_2O_8, Sc F_3）.

关键词： low-temperature heat capacity low-energy phonon modes antiperovskite compound negative thermal expansion

Effects of interstitial cluster mobility on dislocation loops evolution under irradiation of austenitic steel

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Nuclear Science and Techniques 2024年第8期35卷 69-78页

作者： Xin‑Hua Yan Lu Sun Du Zhou Teng Xie Chang peng Ye‑Xin Yang Li Chen Zhen‑Feng tong North China Electric Power University Beijing 102206China China Nuclear Power Operations Co. LtdShenzhen 518000China

The evolution of dislocation loops in austenitic steels irradiated with Fe^(+)is investigated using cluster dynamics(CD)simulations by developing a CD *** CD predictions are compared with experimental results in the *** number density and average diameter of the dislocation loops obtained from the CD simulations are in good agreement with the experimental data obtained from transmission electron microscopy(TEM)observations of Fe~+-irradiated Solution Annealed 304,Cold Worked 316,and HR3 austenitic steels in the *** CD simulation results demonstrate that the diffusion of in-cascade interstitial clusters plays a major role in the dislocation loop density and dislocation loop growth;in particular,for the HR3 austenitic steel,the CD model has verified the effect of temperature on the density and size of the dislocation loops.

关键词： Cluster dynamics Dislocation loops In-cascade interstitial clusters Austenitic steels

GhCTSF1,a short PPR protein with a conserved role in chloroplast development and photosynthesis,participates in intron splicing of rpoC1 and ycf3-2 transcripts in cotton

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Plant Communications 2024年第6期5卷 213-229页

作者： Yuzhu Huo Mengxue Cheng Meiju Tang Meng Zhang Xiaofan Yang Yating Zheng tong Zhao peng He Jianing Yu College of Life Sciences Shaanxi Normal UniversityXi’an 710119China

Cotton is one of the most important textile fibers *** crucial agronomic traits,leaves play an essential role in the growth,disease resistance,fiber quality,and yield of cotton *** repeat(PPR)proteins are a large family of nuclear-encoded proteins involved in organellar or nuclear RNA *** a virus-induced gene silencing assay,we found that cotton plants displayed variegated yellow leaf phenotypes with decreased chlorophyll content when expression of the PPR gene GhCTSF1 was ***1 encodes a chloroplast-localized protein that contains only two PPR *** of GhCTSF1 substantially reduces the splicing efficiency of rpoC1 intron 1 and ycf3 intron *** of function of the GhCTSF1 ortholog EMB1417 causes splicing defects in rpoC1 and ycf3-2,leading to impaired chloroplast structure and decreased photosynthetic rates in *** also found that GhCTSF1 interacts with two splicing factors,GhCRS2 and *** in GhCRS2 and GhWTF1 severely affect intron splicing of rpoC1 and ycf3-2 in cotton,leading to defects in chloroplast development and a reduction in *** results suggest that GhCTSF1 is specifically required for splicing rpoC1 and ycf3-2 in cooperation with GhCRS2 and GhWTF1.

关键词： chloroplast RNA splicing PPR protein cotton photosynthesis

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大型社会活动事故风险管理程序与方法

自然灾害学报 2007年第4期16卷 157-163页

作者：佟瑞鹏中国矿业大学(北京)资源与安全工程学院

分析了活动特性、人群类别、环境因素、场地类型和组织管理等对大型社会活动事故风险的影响,论述了大型社会活动风险管理的一般程序与方法,提出了大型社会活动风险控制的范围和措施。以某园艺博览会为实例,介绍了大型社会活动事故风险... 详细信息

分析了活动特性、人群类别、环境因素、场地类型和组织管理等对大型社会活动事故风险的影响,论述了大型社会活动风险管理的一般程序与方法,提出了大型社会活动风险控制的范围和措施。以某园艺博览会为实例,介绍了大型社会活动事故风险管理应用的全过程,并选用层次分析法进行了事故风险的综合评价。

关键词：大型社会活动事故风险管理层次分析法安全