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Realizing n-type GeSe thermoelectrics:boosting solubility of donor dopants by enhancing crystal symmetry

Rare Metals 2024年第12期43卷 6583-6595页

作者： Xiao-Huan Luo Jia-Hui Cheng Bing-Cai Duan Mo-Ran Wang Yu-Wei Zhou Tu Lyu Chao-Hua Zhang Sheng-Nan Zhang Fu-Sheng Liu Li-Peng Hu Shenzhen Key Laboratory of Special Functional Materials Guangdong Provincial Key Laboratory of Deep Earth Sciences and Geothermal Energy Exploitation and Utilization Guangdong Research Center for Interfacial Engineering of Functional MaterialsCollege of Materials Science and EngineeringInstitute of Deep Earth Sciences and Green Energy Shenzhen University Superconducting Materials research center Northwest Institute for Nonferrous Metal Research

The successful deployment of thermoelectric materials necessitates the concurrent development of highperformance p-type and n-type pairs situated within an identical ***,limiting by the low dopant solubility,the conventional doping often cannot transfer the Fermi level to the opposite carrier ***,the solubility limit of donor dopants was enhanced to achieve n-type GeSe by inducing additional cationic vacancies through raising crystal *** the intrinsic p-type nature of GeSe to n-type poses significant challenges,primarily due to the exceedingly low dopant solubility within its native orthorhombic *** overcome this,the In2Te3 alloying was initially employed to transition GeSe from orthorhombic to rhombohedral structure,simultaneously generating a large number of Ge *** this,the introduction of Pb acts to mitigate the excessive Ge vacancies,steering the material toward a weak p-type ***,the elevated Ge vacancy concentration serves to extend the solubility limit of Bi donor dopant,which not only promotes the formation of cubic phase,but also enables the p-n type *** a result,a peak zT of 0.18 at 773 K was attained for the n-type cubic Ge0.55Bi0.2Pb0.25Se（In2Te3）0.1,marking an18-fold enhancement in comparison with its n-type orthorhombic *** work attests to the efficacy of introducing vacancies through enhancing crystal symmetry as an effective means to expand dopant solubility,thereby offering valuable insights into the achievement of compatible p-and n-type chalcogenides within the same matrix.

关键词： Cationic vacancy Crystal symmetry GeSe Solubility Thermoelectric

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Effect of the alkali metal(Li, Na, K) substitution on the geometric,electronic and optical properties of the smallest diamondoid: First principles calculations

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Chinese Journal of Chemical Engineering 2019年第2期27卷 476-482页

作者： Sriprajak Krongsuk Nikorn Shinsuphan Vittaya Amornkitbumrung Department of Physics Faculty of Science and Integrated Nanotechnology Research Center Khon Kaen University Nanotec-KKU center of Excellence on Advanced Nanomaterials for Energy Production and Storage Khon Kaen University Thailand center of Excellence in Physics (ThEP) Commission on Higher Education

In this study we employed the B3LYP/6-311++G(d,p) method combined with the CIS/6-311++G(d,p) calculation to investigate the effects of the type and the number of alkali metal atoms(Li, Na, K) on the geometric, electronic, and optical properties of alkali metals substituted into adamantanes. Substituting alkali metal(Li, Na, K)atoms caused significant changes in the electronic and optical properties of adamantane. The Ad-1Li, Ad-1Na,and Ad-1K structures showed a dramatically decreased energy gap and ionization potential, while adding more alkali metal atoms slightly decreased these properties. Substituting more alkali metals led to a shift in the maximum absorption wavelength from the visible to the infrared region, depending on the type of alkali metal atom substituted. The magnitude of shift occurred in the following order: Li b Na b K. These characteristics suggest the possibility of tunable electronic structures of this material for optoelectronic device applications.

关键词： Functionalization Electronic structure Molecular stability Bathochromic shift DFT calculations

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GATE TYPE SELECTION BASED ON FUZZY MAPPING

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Chinese Journal of Mechanical Engineering 2002年第1期15卷 31-34,61页

作者： Wang Yu Xing Yuan Ruan Xueyu National Die & Mold CAD Engineering research center，Shanghai Jiaotong University， Shanghai 200030，China Shanghai Jiaotong University National Die & Mold CAD Engineering Research Center 上海 200030

Gate type selection is very important for mould design. Improper gate typemay lead to poor product quality and low production efficiency. Although numerical simulationapproach could be used to optimize gate location, the determination of gate type is still up todesigners' experience. A novel method for selecting gate type based on fuzzy logic is proposed. Theproposed methodology follows three steps: Design requirements for gate is extracted and generalized;Possible gate types (design schemes) are presented; The fuzzy mapping relationship between gatedesign requirements and gate design scheme is established based on fuzzy composition and fuzzyrelation transition matrices that are assigned by domain experts.

关键词： Gate type selection Fuzzy logic

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Optimized Convolutional Neural Networks with Multi-Scale Pyramid Feature Integration for Efficient Traffic Light Detection in Intelligent Transportation Systems

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Computers, Materials & Continua 2025年第2期82卷 3005-3018页

作者： Yahia Said Yahya Alassaf Refka Ghodhbani Taoufik Saidani Olfa Ben Rhaiem Department of Electrical Engineering College of EngineeringNorthern Border UniversityArar91431Saudi Arabia center for Scientific research and Entrepreneurship Northern Border UniversityArar73213Saudi Arabia Department of Civil Engineering College of EngineeringNorthern Border UniversityArar91431Saudi Arabia Faculty of Computing and Information Technology Northern Border UniversityRafha91911Saudi Arabia College of Science Northern Border UniversityArar91431Saudi Arabia

Transportation systems are experiencing a significant transformation due to the integration of advanced technologies, including artificial intelligence and machine learning. In the context of intelligent transportation systems (ITS) and Advanced Driver Assistance Systems (ADAS), the development of efficient and reliable traffic light detection mechanisms is crucial for enhancing road safety and traffic management. This paper presents an optimized convolutional neural network (CNN) framework designed to detect traffic lights in real-time within complex urban environments. Leveraging multi-scale pyramid feature maps, the proposed model addresses key challenges such as the detection of small, occluded, and low-resolution traffic lights amidst complex backgrounds. The integration of dilated convolutions, Region of Interest (ROI) alignment, and Soft Non-Maximum Suppression (Soft-NMS) further improves detection accuracy and reduces false positives. By optimizing computational efficiency and parameter complexity, the framework is designed to operate seamlessly on embedded systems, ensuring robust performance in real-world applications. Extensive experiments using real-world datasets demonstrate that our model significantly outperforms existing methods, providing a scalable solution for ITS and ADAS applications. This research contributes to the advancement of Artificial Intelligence-driven (AI-driven) pattern recognition in transportation systems and offers a mathematical approach to improving efficiency and safety in logistics and transportation networks.

关键词： Intelligent transportation systems(ITS) traffic light detection multi-scale pyramid feature maps advanced driver assistance systems(ADAS) real-time detection AI in transportation

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Gene expression of CCL8 and CXCL10 in peripheral blood leukocytes during early pregnancy in cows

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Journal of Animal Science and Biotechnology 2018年第4期9卷 813-823页

作者： Ryosuke Sakumoto Kosuke Iga Ken-Go Hayashi Shiori Fujii Hiroko Kanahara Misa Hosoe Tadashi Furusawa Division of Animal Breeding and Reproduction research Institute of Livestock and Grassland Science National Agriculture and Food Research Organization (NARO) Division of Livestock and Forage research Tohoku Agricultural Research CenterNARO Division of Animal Sciences Institute of Agrobiological SciencesNARO

Background: The aim of the present study was to evaluate CCL8 and CXCL10 expression and its regulatory mechanism in peripheral blood leukocytes(PBLs) at the time of maternal recognition in cows. Blood samples were collected on 14, 15, 16, 17 and 18 d after artificial insemination(AI). Based on the day of return of estrus, cows were divided into three groups, pregnant(n = 5), early embryonic mortality(EEM; n = 5) and late embryonic mortality(LEM; n = 5). The gene expression levels in PBLs were assessed with quantitative real-time reverse transcription ***: The expression of CCL8 and CXCL10 mRNA in PBLs gradually increased from 14 to 18 d of pregnant cows and significant differences were observed on 18 d(P < 0.05), whereas no significant changes were observed both in EEM and LEM cows. Interferon-stimulated protein 15 k Da(ISG15), myxovirus-resistance gene(MX) 1 and MX2 mRNA expression in PBLs increased from 14 to 18 d which was significant on 18 d of pregnant cows as well as in LEM cows(P < 0.05), but no changes were observed in EEM cows. To determine whether the expression of CCL8 and CXCL10 in PBLs was regulated by pregnancy-related substances or not, expression level was assessed after exposure to interferon-τ(IFNT) and CCL16. Monocytes, granulocytes and lymphocytes were obtained using density-gradient centrifugation and flow cytometry. The addition of IFNT(100 ng/mL) and CCL16(100 ng/mL) to cultured PBLs increased the expression of CCL8 and CXCL10 mRNA(P < 0.05). The expression of ISG15, MX1 and MX2 mRNA in PBLs was also stimulated by IFNT and CCL16(P < 0.05).Conclusions: The expression of CCL8 and CXCL10 genes increased in PBLs during early pregnancy. Since IFNT stimulated CCL8 and CXCL10 expression in cultured PBLs, the increase of CCL8 and CXCL10 might be pregnancy-dependent *** expression of both CCL8 and CXCL10 in PBLs was stimulated by CCL16 as wel as IFNT, suggesting a chemokine interaction that at least includes CCL8, CXCL10 and CCL16, and m

关键词： CCL8 Cow CXCL10 Leukocytes Pregnancy

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Potential of essential oils for poultry and pigs

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Animal Nutrition 2018年第2期4卷 179-186页

作者： Hengxiao Zhai Hong Liu Shikui Wang Jinlong Wu Anna-Maria Kluenter DSM(China)Animal Nutrition research center DSM Nutritional Products Ltd.

The increasing pressure of abolishing and/or decreasing the use of antibiotics as antimicrobial growth promoters for livestock calls for alternative solutions to sustain the efficiency of current livestock *** the alternatives, essential oils have a great potential and are generally considered natural, less toxic, and free from *** oils have been proven in numerous in vitro studies to exert antimicrobial effects on various *** current review touched on the basics of essential oils, and the in vivo effects of essential oils on growth, intestinal microflora, anti-oxidation, immune functionality, meat qualities as well as the possible modes of action in poultry and pigs, and the future research areas were proposed.

关键词： Antibiotics Chickens Essential oils Pathogens Pigs

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Laser SEU sensitivity mapping of deep submicron CMOS SRAM

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Journal of Semiconductors 2014年第6期35卷 76-79页

作者：余永涛封国强陈睿韩建伟 center for Space Science and Applied research Chinese Academy of Sciences University of Chinese Academy of Sciences

The pulsed laser facility for SEU sensitivity mapping is utilized to study the SEU sensitive regions of a 0.18/zm CMOS SRAM cell. Combined with the device layout micrograph, SEU sensitivity maps of the SRAM cell are obtained. TCAD simulation work is performed to examine the SEU sensitivity characteristics of the SRAM cell. The laser mapping experiment results are discussed and compared with the electron micrograph information of the SRAM cell and the TCAD simulation results. The results present that the test technique is reliable and of high mapping precision for the deep submicron technology device.

关键词： single event upset (SEU) sensitivity mapping SRAM cell pulsed laser

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Ultra-broadband and high-efficiency polarization conversion metasurface with multiple plasmon resonance modes

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Chinese Physics B 2016年第8期25卷 158-162页

作者：董果香施宏宇夏颂李玮张安学徐卓魏晓勇 Electronic Materials research Laboratory Key Laboratory of the Ministry of Education & International Center for Dielectric ResearchXi'an Jiaotong University School of Electronic and Information Engineering Xi'an Jiaotong University

In this paper, we present a novel metasurface design that achieves a high-efficiency ultra-broadband cross polarization conversion. The metasurface is composed of an array of unit resonators, each of which combines an H-shaped structure and two rectangular metallic patches. Different plasmon resonance modes are excited in unit resonators and allow the polarization states to be manipulated. The bandwidth of the cross polarization converter is 82% of the central frequency,covering the range from 15.7 GHz to 37.5 GHz. The conversion efficiency of the innovative new design is higher than 90%.At 14.43 GHz and 40.95 GHz, the linearly polarized incident wave is converted into a circularly polarized wave.

关键词： polarization metasurface plasmon ultra-broadband

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T cell metabolism in obesity and beyond:comments on‘DsbA-L deficiency in T cells promotes diet-induced thermogenesis through suppressing IFN-y production’

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Journal of Molecular Cell Biology 2021年第5期13卷 389-391页

作者： Haiyan Zhou Feng Liu National Clinical research center for Metabolic Diseases Metabolic Syndrome Research Centerand Department of Metabolism and EndocrinologyThe Second Xiangya Hospital of Central South UniversityChangsha 410011China Department of Pharmacology University of Texas Health Science Center at San AntonioSan AntonioTX 78229USA

T cells have long been known as the core of adaptive immunity and play piv-otal roles in host defense(Zhu et al.,2010).There are two main types of T cells in our body,cytotoxic T cells(CD8^(+))and helper T(Th)cells(CD4^(+)),the latter comprised of Th1,Th2,Th17,and Treg *** evidence supports that metabolic reprogramming of T cells leads to dramatic changes in tissue microenvironments,which may alter whole-body energy homeostasis and metabolism,beyond their roles in adaptive immunity(Varanasi et al.,2020).

关键词： metabolism immunity

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Development of Space Environment research in China

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空间科学学报 2006年第Z1期26卷 138-149页

作者： GONG Jiancun XUE Bingsen HUANG Jianguo SHI Liqin center for Space Science and Applied research Chinese Academy of Sciences Beijing 100080 China Center for Space Science and Applied Research Chinese Academy of Sciences Beijing 100080 China Center for Space Science and Applied Research Chinese Academy of Sciences Beijing 100080 China Center for Space Science and Applied Research Chinese Academy of Sciences Beijing 100080 China

Abstract This paper presents the recent research progress on space environment in China. The space environment here includes space environment models, forecast methodology and space environment effects on spacecrafts.... 详细信息

关键词： Space environment

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