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Strategies to advance thermoelectric performance of PbSe and PbS materials

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Rare Metals 2024年第9期43卷 4099-4114页

作者： Zheng-Hao Hou xin Qian Qiu-Juan Cui Shu-Fang Wang Li-Dong Zhao Shijiazhuang Key Laboratory of Low Carbon Energy Materials College of Chemical EngineeringShijiazhuang University Hebei Key Lab of Optic-Electronic Information and Materials College of Physics Science and Technology Hebei University School of Materials Science and Engineering Beihang University

Thermoelectric materials possess the unique capability to convert thermal energy into electric energy and vice versa, making them promising for waste heat recovery and efficient cooling systems. Currently, extensively investigated thermoelectric materials such as Bi2Te3,PbTe and GeTe exhibit superior thermoelectric properties at room temperature and medium temperature ***, the broad application of these thermoelectric materials has been impeded by the high cost and restricted accessibility of Te and Ge in the earth's crust. Over the past few years, researchers have shown increasing interest in PbSe-and PbS-based materials, primarily attributed to their abundant elemental supply and relatively low costs. The assessment of research progress and a comprehensive overview of optimization strategies in time can significantly contribute to further improving the thermoelectric performance. These strategies include optimizing carrier concentration(aliovalent doping, dynamic doping and defect state), enhancing density-of-state effective mass(band convergence, band flattening and energy filtering effect), optimizing carrier mobility(band sharpening and band alignment) and reducing lattice thermal conductivity(all-scale hierarchical defect structures designing). This systematic summary and analysis provide novel insights and perspectives for the development of thermoelectric materials.

关键词： Carrier concentration

Enhancing Energy Efficiency with a Dynamic Trust Measurement Scheme in Power Distribution Network

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Computers, Materials & Continua 2024年第3期78卷 3909-3927页

作者： Yilei Wang xin Sun Guiping Zheng Ahmar Rashid Sami Ullah Hisham Alasmary Muhammad Waqas Zhejiang Electric-Power Corporation Research Institute Zhejiang310014China Faculty of Information Technology Beijing University of TechnologyBeijing100124China Beijing Trusty Cloud Technology Co. Ltd.Beijing100022China Department of Computer Science and Engineering Ghulam Ishaq Khan Institute of Engineering Sciences and EngineeringTopi23640Pakistan Department of Computer Science Shaheed Benazir Bhutto UniversitySheringalUpper Dir18050Pakistan Department of Computer Science College of Computer ScienceKing Khalid UniversityAbha61421Saudi Arabia School of Computing and Mathematical Science Faculty of Engineering and ScienceUniversity of GreenwichLondonSE109LSUK School of Engineering Edith Cowan UniversityPerth6027Australia

The application of Intelligent Internet of Things(IIoT)in constructing distribution station areas strongly supports platform transformation,upgrade,and intelligent *** sensing layer of IIoT comprises the edge convergence layer and the end sensing layer,with the former using intelligent fusion terminals for real-time data collection and ***,the influx of multiple low-voltage in the smart grid raises higher demands for the performance,energy efficiency,and response speed of the substation fusion ***,it brings significant security risks to the entire distribution substation,posing a major challenge to the smart *** response to these challenges,a proposed dynamic and energy-efficient trust measurement scheme for smart grids aims to address these *** scheme begins by establishing a hierarchical trust measurement model,elucidating the trust relationships among smart IoT *** then incorporates multidimensional measurement factors,encompassing static environmental factors,dynamic behaviors,and energy *** comprehensive approach reduces the impact of subjective factors on trust ***,the scheme incorporates a detection process designed for identifying malicious low-voltage end sensing units,ensuring the prompt identification and elimination of any malicious ***,in turn,enhances the security and reliability of the smart grid *** effectiveness of the proposed scheme in pinpointing malicious nodes has been demonstrated through simulation ***,the scheme outperforms established trust metric models in terms of energy efficiency,showcasing its significant contribution to the field.

关键词： IIoT trusted measure energy efficient

碳纳米管负载纳米TiO_2复合材料的制备及其性能

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物理化学学报 2008年第1期24卷 97-102页

作者：吴玉程刘晓璐叶敏解挺黄新民合肥工业大学材料科学与工程学院合肥230009

采用溶胶-凝胶法,以钛酸丁酯为原料,将纳米TiO2负载在碳纳米管(CNTs)表面,制备了CNT-TiO2光催化复合材料.通过X射线衍射(XRD)、透射电子显微镜(TEM)等手段研究了复合颗粒的形态结构及包覆情况,通过UV-Vis漫反射谱分析比较了纯TiO2和CNT-... 详细信息

采用溶胶-凝胶法,以钛酸丁酯为原料,将纳米TiO2负载在碳纳米管(CNTs)表面,制备了CNT-TiO2光催化复合材料.通过X射线衍射(XRD)、透射电子显微镜(TEM)等手段研究了复合颗粒的形态结构及包覆情况,通过UV-Vis漫反射谱分析比较了纯TiO2和CNT-TiO2的吸光性能,并研究了不同温度热处理的CNT-TiO2光催化剂在紫外光照射下对甲基橙光催化降解的性能.结果表明,纳米TiO2颗粒以锐钛矿相存在,紧密地包附在碳纳米管的管壁上,CNT-TiO2在紫外-可见光波长范围内均有较好的吸光性能,450℃热处理后的复合光催化剂CNT-TiO2比纯TiO2对甲基橙光降解有更高的光催化活性.

关键词：溶胶-凝胶法二氧化钛碳纳米管光催化

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论媒体深度融合的机制创新路径

山西师大学报（社会科学版） 2021年第5期48卷 70-75,112页

作者：黄楚新许可中国社会科学院新闻与传播研究所北京100021 中国社会科学院大学新闻传播学院北京100021

媒体深度融合时期,推动体制机制创新是传统主流媒体向新型主流媒体转型的关键。体制层面国家战略在持续深化,而作为媒体内部的机制创新具有自主性、开拓性等特点,需要结合政策与市场因素,朝着体系化的方向不断调整。主流媒体需要整合内... 详细信息

媒体深度融合时期,推动体制机制创新是传统主流媒体向新型主流媒体转型的关键。体制层面国家战略在持续深化,而作为媒体内部的机制创新具有自主性、开拓性等特点,需要结合政策与市场因素,朝着体系化的方向不断调整。主流媒体需要整合内部要素与外部资源,创新战略运行机制、内容生产机制、考核评价机制与综合运营机制,构建起科学合理的机制体系,充分激发内部活力,以适应媒体深度融合"深水区"的要求。

关键词：媒体深度融合主流媒体传媒机制

电泳沉积-烧结法制备TiC涂层及相关因素作用初探

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材料保护 2009年第6期42卷 67-69页

作者：黄新孙亚丽唐楷李伟四川理工学院材料与化学工程系四川自贡643000 自贡硬质合金有限责任公司四川自贡643011

碳化钛涂层是一种重要的功能性涂层,因具有良好的性能而被广泛应用于刀具、模具等行业。电泳沉积(EPD)制备涂层设备简单、成本低、成膜快、厚度均匀,并且在较大范围内可控。为此,将电泳沉积法与烧结法结合,在YT15硬质合金制品上制备出... 详细信息

碳化钛涂层是一种重要的功能性涂层,因具有良好的性能而被广泛应用于刀具、模具等行业。电泳沉积(EPD)制备涂层设备简单、成本低、成膜快、厚度均匀,并且在较大范围内可控。为此,将电泳沉积法与烧结法结合,在YT15硬质合金制品上制备出均匀的TiC涂层,研究了碳化钛粉末在悬浮介质中的荷电机理,考察了碳化钛粉末在有机悬浮液中的分散性和分散稳定性,对涂层结构进行了表征,并探讨了电泳沉积过程中的一些因素对涂层的影响。

关键词：电泳沉积烧结碳化钛涂层结构表征

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通心络抗家兔主动脉粥样硬化的作用及其机制

吉林大学学报（医学版） 2010年第1期36卷 119-122页

作者：宋子凯曲锐秦玲黄可欣吉林大学第一医院心内科吉林长春130021 吉林大学基础医学院组织学与胚胎学教研室吉林长春130021

目的:观察通心络对主动脉粥样硬化家兔血清和动脉粥样硬化(AS)局部纤溶酶原激活物抑制物-1(PAI-1)及血管细胞黏附分子-1(VCAM-1)表达的影响,阐明通心络抗AS的可能机制。方法:24只大耳白兔随机分为常规饲料组、胆固醇饲料组和通心络组,饲... 详细信息

目的:观察通心络对主动脉粥样硬化家兔血清和动脉粥样硬化(AS)局部纤溶酶原激活物抑制物-1(PAI-1)及血管细胞黏附分子-1(VCAM-1)表达的影响,阐明通心络抗AS的可能机制。方法:24只大耳白兔随机分为常规饲料组、胆固醇饲料组和通心络组,饲养14周,检测实验前后血清胆固醇(TC)、甘油三酯(TG)、低密度脂蛋白(LDL)、PAI-1、VCAM-1水平的变化;处死动物后取主动脉进行病理学检查;采用免疫组织化学方法测定AS局部PAI-1和VCAM-1阳性表达百分数。结果:实验前三组动物血清TC、TG、LDL、PAI-1和VCAM-1水平比较差异无显著性(P>0.05),14周后胆固醇饲料组和通心络组TC、TG、LDL、PAI-1和VCAM-1水平明显高于对照组(P<0.01),通心络组血清TC、TG、LDL、PAI-1和VCAM-1水平明显低于胆固醇饲料组(P<0.01);免疫组织化学检测胆固醇饲料组和通心络组AS局部PAI-1和VCAM-1的阳性表达百分数明显高于对照组(P<0.01),通心络组PAI-1和VCAM-1的阳性表达较胆固醇饲料组的表达明显减少(P<0.01)。结论:AS的发生伴有PAI-1和VCAM-1的过度表达,抑制PAI-1和VCAM-1的表达可能是通心络抗AS机制之一。

关键词：通心络动脉粥样硬化纤溶酶原激活物抑制物1 血管细胞黏附分子-1

A novel minority sample fault diagnosis method based on multisource data enhancement

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International Journal of Mechanical System Dynamics 2024年第1期4卷 88-98页

作者： Yiming Guo Shida Song Jing huang School of Mechanical Engineering Nanjing University of Science and TechnologyNanjingChina School of Materials Science and Engineering Nanjing University of Science and TechnologyNanjingChina

Effective fault diagnosis has a crucial impact on the safety and cost of complex manufacturing ***,the complex structure of the collected multisource data and scarcity of fault samples make it difficult to accurately identify multiple fault *** address this challenge,this paper proposes a novel deep-learning model for multisource data augmentation and small sample fault *** raw multisource data are first converted into two-dimensional images using the Gramian Angular Field,and a generator is built to transform random noise into images through transposed convolution ***,two discriminators are constructed to evaluate the authenticity of input images and the fault diagnosis *** Vision Transformer network is built to diagnose faults and obtain the classification error for the ***,a global optimization strategy is designed to upgrade parameters in the *** discriminators and generator compete with each other until Nash equilibrium is achieved.A real-world multistep forging machine is adopted to compare and validate the performance of different *** experimental results indicate that the proposed method has multisource data augmentation and minority sample fault diagnosis *** with other state-of-the-art models,the proposed approach has better fault diagnosis accuracy in various scenarios.

关键词： multisource data augmentation minority sample fault diagnosis complex manufacturing system global optimization Vision Transformer

盐酸哌甲酯控释片联合心理干预治疗儿童注意缺陷多动障碍的临床研究

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中国临床药理学杂志 2020年第15期36卷 2343-2345页

作者：黄明欣石萍于情李宇天津市儿童医院心理科天津300000

目的观察盐酸哌甲酯控释片联合心理干预治疗儿童注意缺陷多动障碍(ADHD)的临床疗效。方法将100例ADHD儿童随机分为对照组和试验组,每组50例。对照组给予盐酸哌甲酯控释片每次18 mg,qd,晨起口服;试验组在对照组治疗的基础上,联合心理干预... 详细信息

目的观察盐酸哌甲酯控释片联合心理干预治疗儿童注意缺陷多动障碍(ADHD)的临床疗效。方法将100例ADHD儿童随机分为对照组和试验组,每组50例。对照组给予盐酸哌甲酯控释片每次18 mg,qd,晨起口服;试验组在对照组治疗的基础上,联合心理干预,每次治疗30 min,每周2次。2组患儿均连续治疗9个月。比较2组患儿的临床疗效。结果治疗后,试验组和对照组的多动指数分别为(2.97±1.23)和(4.31±1.78)分,对立违抗分别为(1.02±0.37)和(1.76±0.95)分,注意力分别为(2.39±0.68)和(3.71±1.06)分,身心障碍分别为(0.99±1.07)和(1.45±1.21)分,学习问题评分分别为(2.62±1.45)和(3.74±1.59)分,差异均有统计学意义(均P<0.05)。结论盐酸哌甲酯控释片联合心理干预治疗儿童ADHD的临床疗效确切,其能有效地提高患儿注意力。

关键词：盐酸哌甲酯控释片心理干预注意缺陷多动障碍儿童

Free Products of Trialgebras

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Algebra Colloquium 2024年第1期31卷 25-40页

作者： Juwei huang Yuqun Chen Zerui Zhang School of Mathematics and Statistics Huizhou University HuizhouGuangdong 516007China School of Mathematical Sciences South China Normal University Guangzhou 510631China

We apply the method of Grobner-Shirshov bases for replicated algebras devel-oped by Kolesnikov to offer a general approach for constructing free products of associative trialgebras(or trioids).In particular,the open p... 详细信息

关键词： Grobner-Shirshov basis trialgebra trioid dimonoid free product