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Enhanced thermoelectric performance of CoSbS_(0.85)Se_(0.15) by point defect

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Rare Metals 2018年第4期37卷 326-332页

作者： Shan-Shan Zhang Ding-Feng yang Nusrat Shaheen Xing-Chen Shen Dan-Dan Xie yan-ci yan Xu Lu Xiao-Yuan Zhou Department of Applied Physics Chongqing University Institute of Microstructure and Properties of Advanced Materials Beijing University of Technology

In this study, we report the effect of Zn doping on the thermoelectric properties of CO1-xZnxSbS0.85Se0.15 solid solutions （x = 0, 0.02, 0.05, 0.08）. The results show the dimensionless figure of merit （zT） increases from 0.17 to 0.34 at 875 K for Co0.95Zn0.05SbS0.85Se0.15 sample, due to the noticeable decrease in the lattice thermal conductivity by introducing point defect, which is further confirmed by an analysis based on the Debye-Callaway- Klemens model. Meanwhile, the thermoelectric power factor is maintained at high temperatures. This work highlights the important role of point defect in improving the thermoelectric performance of CoSbS-based compounds.

关键词： CoSbS Point defect Thermal conductivity Thermoelectric performance

Achieving high power factor in GaSb with intrinsically high mobility via Ge doping

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Rare Metals 2024年第10期43卷 5435-5441页

作者： yan-ci yan Guo-Wei Wang Qi-Hong Xiong Xu Lu Peng Chen Wei Zou Deng-Feng Li Hong Wu Yun Zhou Xiao-Yuan Zhou School of Science Chongqing University of Posts and TelecommunicationsChongqing 400065China College of Physics Chongqing UniversityChongqing 401331China College of Ocean Science and Engineering Shanghai Maritime UniversityShanghai 201306China

The thermoelectric power factor is as crucial as their overall thermoelectric ***-based compounds are deemed to achieve high power factor owing to their intrinsically high mobility compared to classical thermoelectric ***,the carrier concentration of pristine GaSb is considerably lower than the optimum value,which hinders its ability to attain high electrical *** this paper,we present the investigations on the thermoelectric performance of p-type GaSb_(1-x)Ge_(x)*** experimental results reveal that Ge doping can effectively tune the carrier concentration.

关键词： power GaSb mobility

Enhanced thermoelectric performance of Cu_(2)SnSe_(3) via synergistic effects of Cd-doping and CuGaTe_(2) alloying

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Rare Metals 2022年第10期41卷 3466-3474页

作者： Yi-Jing Fan Kun-Ling Peng Yu-Ling Huang Hui-Jun Liao Zheng-Yong Huang Jian Li yan-ci yan Hao-Shuang Gu Bin Zhang Yong-Ming Hu Xu Lu Xiao-Yuan Zhou Faculty of Physics and Electronic Sciences Hubei Key Laboratory of Ferro and Piezoelectric Materials and DevicesHubei UniversityWuhan430062China College of Physics Chongqing UniversityChongqing400044China State Key Laboratory of Power Transmission Equipment and System Security and New Technology Chongqing UniversityChongqing400044China School of Science Chongqing University of Posts and TelecommunicationsChongqing400065China Analytical and Testing Center Chongqing UniversityChongqing400044China

In this work,we show significantly enhanced thermoelectric performance in Cu_(2) SnSe_(3) via a synergistic effect of Cd-doping and CuGaTe_(2) alloying in the temperature range of 300-823 *** the electron and phonon transport properties can be simultaneously regulated by Cd doping at Sn site,leading to a higher quality ***,a maximum figure of merit(zT) value of ~0.68 was obtained for Cu_(2) Sn_(0.93)Cd_(0.07)Se_(3) sample at823 K,which is about four times higher than that of the pristine sample(zT=0.18 at 773 K).Furthermore,Cu_(2) Sn_(0.93)Cd_(0.07)Se_(3) was alloyed with CuGaTe_(2) to reduce the lattice thermal conductivity in the high-temperature ***,a further enhanced zT value(0.77,823 K) was achieved in the(Cu_(2) Sn_(0.93)Cd_(0.07)Se_(3))_(0.94)(CuGaTe_(2))_(0.06) sample,with a high average zT(zT_(ave)) value of0.30 between 300 and 823 *** results demonstrate that Cd-doping combined with CuGaTe2 alloying could be an effective method to enhance zT values of Cu_(2) SnSe_(3) based compounds.

关键词： Cu_(2)SnSe_(3) Synergistic optimization Alloying Quality factor Thermoelectric

城市化进程中失地农民生活方式的变迁——以对合肥市JLY小区的调查为例

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宜宾学院学报 2012年第4期12卷 23-28页

作者：慈艳艳高朋安徽大学社会与政治学院合肥230601

失地农民原有生产生活环境和条件的改变,以及集中居住、经济因素的影响,引起了他们生活方式的改变,主要表现为劳动生活方式、消费生活方式、社会交往方式、政治生活方式和休闲娱乐生活方式五个方面的变化。政府应通过解决失地农民的就... 详细信息

失地农民原有生产生活环境和条件的改变,以及集中居住、经济因素的影响,引起了他们生活方式的改变,主要表现为劳动生活方式、消费生活方式、社会交往方式、政治生活方式和休闲娱乐生活方式五个方面的变化。政府应通过解决失地农民的就业问题、完善社会保障以及加强社区建设等措施,对失地农民的生活方式进行调适,化解失地农民的身份认同危机。

关键词：失地农民生活方式身份认同

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新疆医科大学三所附属医院安全文化

解放军医院管理杂志 2017年第9期24卷 893-897页

作者：石慧闫慈陈艳姚华新疆医科大学第一附属医院纪检监察审计部纪检监察科乌鲁木齐830054 新疆医科大学公共卫生学院流行病与统计教研室乌鲁木齐830011 新疆医科大学公共卫生学院毒理教研室乌鲁木齐830011 新疆医科大学第一附属医院乌鲁木齐830054

目的描述新疆医科大学某三所附属医院的安全文化现状及其影响因素、存在问题及建设对策。方法采用分层随机抽样方法,选取新疆医科大学某三所附属医院共700名员工,利用美国得克萨斯大学所研制的"安全态度问卷"(缩减版),在2016年4—6月期... 详细信息

目的描述新疆医科大学某三所附属医院的安全文化现状及其影响因素、存在问题及建设对策。方法采用分层随机抽样方法,选取新疆医科大学某三所附属医院共700名员工,利用美国得克萨斯大学所研制的"安全态度问卷"(缩减版),在2016年4—6月期间对三所医院员工进行问卷调查,对各医院的安全文化现状进行评价。结果共收回有效问卷659份,有效回收率为94.14%;新疆医科大学某三所医院总体比较结果为A>C>B。结论新疆医科大学某三所附属医院员工的安全文化总体较好,但需在某些方面完善提高,B、C医院更应注重安全文化的建设。

关键词：医院安全文化安全态度评价研究

ANALYTICAL STUDY ON FLOW PROCESS OF FLOATING-OIL RECOVERY DEVICE FROM OIL-CONTAMINATED SEAWATER BY MHD METHOD

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Journal of Hydrodynamics 2007年第2期19卷 195-200页

作者： ZHANG Guo-yan PENG yan ZHAO Ling-zhi LI Ran SHA ci-wen Institute of Electrical Engineering Chinese Academy of Sciences Beijing 100080 China

A new method of recovering maritime oil-spill based on electromagnetic force, the so-called MHD oil-spill recovery method was proposed in the IEECAS. The operating process of MHD channel was described in this article. Numerical study was carried out using a two-dimensional water-air two-phase model and the VOF method. The agreement between the numerical and the experimental results was reached.

关键词： numerical simulation water-air two phaseflow VOF method MHD

Spear and Shield： Evolution of Integrated circuit Camouflaging

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Journal of Computer Science & Technology 2018年第1期33卷 42-57页

作者： Xue-yan Wang Qiang Zhou Yi-ci Cai Gang Qu Department of Computer Science and Technology Tsinghua University Beijing 100083 China Department of Electrical and Computer Engineering UniversiLy of Maryland College Park MD 20740 U.S.A.

Intellectual property （IP） protection is one of the hardcore problems in hardware security. Semiconductor industry still lacks effective and proactive defense to shield IPs from reverse engineering （RE） based attacks. Integrated circuit （IC） camouflaging technique fills this gap by replacing some conventional logic gates in tile IPs with specially designed logic cells （called camouflaged gates） without changing the functions of tile IPs. The camouflaged gates can perform different logic functions while maintaining an identical look to RE attackers, thus preventing them from obtaining the layout information of the IP directly from RE tools. Since it was first proposed in 2012, circuit camouflaging has become one of the hottest research topics in hardware security focusing on two fundamental problems. How to choose the types of camouflaged gates and decide where to insert them in order to simultaneously minimize the performance overhead and optimize the RE complexity？ How can an attacker de-camouflage a camouflaged circuit and complete the RE attack？ In this article, we review the evolution of circuit camouflaging through this spear and shield race. First, we introduce the design methods of four different kinds of camouflaged ceils based on true/dummy contacts, static random access memory （SRAM）, doping, and emerging devices, respectively. Then we elaborate four representative de-camouflaging attacks： brute force attack, IC testing based attack, satisfiability-based （SAT-based） attack, and the circuit partition based attack, and the corresponding countermeasures： clique-based camouflaging, CamoPerturb, AND-tree camouflaging, and equivalent class based camouflaging, respectively. We argue that the current research efforts should be on reducing overhead introduced by circuit camouflaging and defeating decamouflaging attacks. We point out that exploring features of emerging devices could be a promising direction. Finally, as a complement to circuit camouflaging, we concl

关键词： circuit camouflaging reverse engineering intellectual property (IP) protection hardware security

糖皮质激素联合抗结核药物治疗对结核性浆膜炎有效性、不良反应及病死率的Meta分析

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中国防痨杂志 2025年第1期47卷 77-86页

作者：石宜林顾岩内蒙古医科大学附属医院呼吸与危重症医学科A区呼和浩特010030 内蒙古自治区第四医院急诊科呼和浩特010000

目的:系统评价糖皮质激素联合抗结核药物治疗结核性浆膜炎有效率、不良反应及病死率的变化。方法:采用主题词与自由词相结合的方式,从中国知网、万方、维普、中国生物医学文献数据库、PubMed和Web of Science中检索糖皮质激素联合抗结... 详细信息

目的:系统评价糖皮质激素联合抗结核药物治疗结核性浆膜炎有效率、不良反应及病死率的变化。方法:采用主题词与自由词相结合的方式,从中国知网、万方、维普、中国生物医学文献数据库、PubMed和Web of Science中检索糖皮质激素联合抗结核药物治疗结核性浆膜炎的随机对照实验(RCT)并纳入研究文章中的参考文献,检索时限均从建库至2024年8月1日。中文检索词包括肺外结核、结核性脑膜炎、结核性胸膜炎、结核性心包炎、糖皮质激素、类固醇激素、地塞米松、甲泼尼龙等;英文检索词包括extrapulmonary tuberculosis,tuberculous meningitis,tuberculous pleurisy,tuberculous pericarditis,glucocorticoids,steroid hormones,dexamethasone,methylprednisolone等。由2名研究人员独立筛选文献、提取数据、评价文献质量后,采用Stata 15.1软件对纳入的数据进行异质性检验分析及发表偏倚分析,以对结核性浆膜炎在抗结核治疗的基础上应用糖皮质激素后的有效性、不良反应及病死率等进行综合评价。结果:共检索到相关文献4619篇,排除不符合入组标准的文献后最终纳入31篇文献、2410例患者进行Meta分析,其中,抗结核治疗联合糖皮质激素治疗组患者(观察组)1228例,仅抗结核治疗组患者(对照组)1182例;根据疾病类型将患者再分为结核性脑膜炎组(包括23项研究,观察组876例,对照组876例)、结核性胸膜炎组(包括6项研究,观察组280例,对照组276例)和结核性心包炎组(包括2项研究,观察组72例,对照组30例)。Meta分析结果显示,与对照组相比,联合糖皮质激素对结核性脑膜炎、结核性胸膜炎和结核性心包炎的治疗有效性均更好[OR(95%ci)=4.63(3.48~6.17)、6.62(3.55~12.34)、7.92(2.44~25.66)]、对结核性脑膜炎的病死率更低[OR(95%ci)=0.45(0.23~0.87)],对结核性胸膜炎的不良反应更少[OR(95%ci)=0.31(0.18~0.52)]。结论:糖皮质激素联合抗结核药物治疗可提高结核性脑膜炎、结核性胸膜炎和结核性心包炎治疗有效性,降低结核性脑膜炎病死率和结核性胸膜炎药物不良反应。

关键词：结核浆膜炎抗结核药糖皮质激素类治疗结果 Meta分析(主题)

A thermal stress loading technique for large-sized hot dry rock mechanical tests

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Deep Underground Science and Engineering 2024年第3期3卷 326-337页

作者： Huiling ci Bing Bai Hongwu Lei yan Zou Jianfeng Liu State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhanChina University of Chinese Academy of Sciences BeijingChina State Key Laboratory of Hydraulics and Mountain River Engineering Sichuan UniversityChengduChina

Testing of large-sized specimens is becoming increasingly important in deep underground rock mechanics and *** traditional mechanical loading,stresses on large-sized specimens are achieved by large host frames and hydraulic pumps,which could lead to great ***-cost testing machines clearly always have great *** this study,a new approach is proposed using thermal expansion stress to load rock specimens,which may be particularly suitable for tests of deep hot dry rock with high *** is a different technical route from traditional mechanical loading through hydraulic *** the rock mechanics test system of hot dry rock that already has an investment in heating systems,this technology may reduce the cost of the loading subsystem by fully utilizing the temperature *** paper presents the basic principle and a typical design of this technical *** feasibility analysis is then conducted based on numerical *** some technical details still need to be resolved,the feasibility of this loading approach has been preliminarily confirmed.

关键词： deep rock engineering high-temperature and high-stress conditions hot dry rock large-sized model test thermal stress loading

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