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Synergistic effect of bonding heterogeneity and phonon localization in introducing excellent thermoelectric properties in layered heteroanionic NdZnSbO material

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Journal of Energy Chemistry 2025年第1期100卷 259-272页

作者： Da Wan Shuwei Tang Shulin Bai Xiaodong Li Peng Ai Wanrong Guo Tuo Zheng college of Materials Science and Engineering Liaoning Technical University Faculty of Chemistry Northeast Normal University

Layered rare-earth metal oxides, harnessing the dual properties of oxides and two-dimensional layered materials, exhibit remarkable thermal stability and quantum confinement effects. Therefore, this work adopts the first-principles calculation combined with the Boltzmann transport theory to predict the thermoelectric properties of NdZnSbO compound. The coexistence of weak interlayer van der Waals interactions, robust intralayer ionic bonding, and partial covalent bonding leads to remarkable bonding heterogeneity, which engenders pronounced phonon scattering and imposes constraints on thermal transport along the out-of-plane direction. The weakened chemical bonds induced by the antibonding states, together with the rattling-like behavior of the Zn atom, culminate in the profound anharmonicity in the layered NdZnSbO compound. The weakening bond and heavy element contribute to the softness of phonon modes, which significantly diminishes the phonon group velocity. The redistribution-dominated four-phonon scattering process spans a large optical gap, which effectively reduces the lattice thermal conductivity. The NdZnSbO compound exhibits direct semiconductor characteristic with a bandgap of 0.73 e V by adopting the Heyd-Scuseria-Ernzerhof(HSE06) functional in combination with spin–orbit coupling(SOC) effect. The multi-valley feature of NdZnSbO compound augur favorably for band degeneracy, thus amplifying the power factor. Consequently, an optimal figure-of-merit(ZT) of 3.40 at 900 K is achieved for the n-type NdZnSbO compound. The present study delves deeply insights into the origins for the low thermal conductivity of NdZnSbO compound and proposes an optimization scheme to enhance overall thermoelectric performance.

关键词： Bond strength (chemical)

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Campus Construction Featuring Plant Landscapes: A Case Study of Guang'an vocational & technical college

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Journal of Landscape Research 2019年第2期11卷 4-7页

作者： YAO Dequan Guang'an vocational & technical college

SStarting from the analysis of the significance of characteristic plant landscapes in the campus, this paper took Guang'an vocational & technical college for example, combined with the greening practice of the college, designed the planning layout of "one axis, two phases, three rings, and five areas" of the college, and put forward suggestions for campus construction featuring plant landscapes.

关键词： Plant landscapes Characteristics Campus

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Environmental Cultural Landscape Characteristics of Agricultural vocational colleges: A Case Study of Bioengineering Branch of Yangling Vocation and technical college and Doucun Farm

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Journal of Landscape Research 2015年第4期7卷 25-28页

作者： CHEN Qi WANG Zhousuo ZHU Zhanbin Yangling vocational & technical college

Based on the overall planning of environmental cultural construction of Yangling vocational & technical college and the college–enterprise co-construction of Doucun Farm, this paper combined environmental cultural reformation inside and outside the college and reform of off-campus teaching experiment farm in view of outstanding agricultural characteristics of the bioengineering branch, with environmental health preservation as the fundamental goal and "health-preserving agriculture" as the link. In addition, four major characteristic landscape frameworks of "point, line, surface, and body" were established, and the effective construction approaches of health-preserving environmental cultural landscapes in vocational colleges were explored.

关键词： Bioengineering Branch Health-preserving agriculture Environmental cultural construction

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Theoretic Study of 3-(4-N-Maleimido)-phenyl-2,4-dihydro-2H-1,3-benzoxazine Molecular Structure,Spectrum and Thermodynamic Properties

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Chinese Journal of Structural Chemistry 2011年第12期30卷 1691-1698页

作者：陈自然徐友辉陶果 Building and Environmental Engineering Department of Sichuan Vocational and Technical College

The geometric structures,electronic absorption spectrum,and thermodynamic pro-perties of 3-（4-N-maleimido）-phenyl-2,4-dihydro-2H-1,3-benzoxazine molecule were studied at the B3LYP/6-311＋G＊ level by density functional *** results show that three rings of this molecule are in different *** gas,absorption wavelength of the lowest energy excitation was obtained at 503 nm,and solvents made it blue-shifted by 3-7 nm,both corresponding to the electron transition of HOMO → *** 298.15 K,the standard molar formed enthalpy and free energy of the title compound molecule were-549.43 and-273.37 kJ·mol-1,respectively.

关键词： maleimide benzoxazine density functional theory spectra thermodynamic properties

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ICA-Net: improving class activation for weakly supervised semantic segmentation via joint contrastive and simulation learning

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Optoelectronics Letters 2025年第3期 188-192页

作者： YE Zhuang LIU Ruyu SUN Bo School of Information Engineering Chengdu Aviation Vocational and Technical College School of Computer Science and Engineering Hangzhou Normal University Quanzhou Institute of Equipment Manufacturing Haixi Institutes Chinese Academy of Sciences

In the field of optoelectronics, certain types of data may be difficult to accurately annotate, such as high-resolution optoelectronic imaging or imaging in certain special spectral ranges. Weakly supervised learning can provide a more reliable approach in these situations. Current popular approaches mainly adopt the classification-based class activation maps (CAM) as initial pseudo labels to solve the task.

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Fabrication and Mechano-sensing Characteristics of Bending Polypyrrole Actuator

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期 240-245页

作者：陈金友胡巍 School of Automotive Engineering Hunan Financial & Industrial Vocational-technical College college of Mechanical and Electrical Engineering Hunan Agricultural University

To prepare a conductive polymer actuator with decent performance,a self-built experimental platform for the preparation of polypyrrole film is *** of the essential goals is to examine the mechanical characteristics of the actuator in the presence of various combinations of process parameters,combined with the orthogonal test method of "four factors and three levels".The bending and sensing characteristics of actuators of various sizes are methodically examined using a self-made bending polypyrrole *** functional relationship between the bending displacement and the output voltage signal is established by studying the characteristics of the actuator sensor subjected to various degrees of *** experimental results reveal that the bending displacement of the actuator tip almost exhibits a linear variation as a function of length and *** the voltage reaches 0.8 V,the bending speed of the actuator tends to be ***,the mechanical properties of the self-assembled polypyrrole actuator are verified by the design and fabrication of the microgripper.

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A Case Study on the Effectiveness of Pre-Class Activities in Higher vocational English Classes: Taking Pingliang vocational and technical college as an Example

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Journal of Contemporary Educational Research 2024年第8期8卷 233-237页

作者： Liuna Yang Pingliang vocational and technical college Pingliang 744000Gansu ProvinceChina

Based on Bloom’s“effective teaching theory,”this paper proposes pre-class activities to improve students’enthusiasm and autonomy in English *** include sentence construction,situational dubbing,famous quotes,English songs,English games,Chinese stories,regional cultures,and theme debates,which combine life,interest,and inspiration as the main *** activities can enhance the sense of participation and achievement of all students to achieve the purpose of effective teaching.

关键词： Higher vocational college English class Pre-class activity Effectiveness

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Spin current and its heat effect in a multichannel quantum wire with Rashba spin-orbit coupling

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Chinese Physics B 2011年第7期20卷 387-392页

作者：宋占锋王亚东邵慧彬孙志刚 Zhangjiakou vocational and technical college

Using the perturbation method, we theoretically study the spin current and its heat effect in a multichannel quantum wire with Rashba spin-orbit coupling. The heat generated by the spin current is calculated. With the increase of the width of the quantum wire, the spin current and the heat generated both exhibit period oscillations with equal amplitudes. When the quantum-channel number is doubled, the oscillation periods of the spin current and of the heat generated both decrease by a factor of 2. For the spin current js,xy, the amplitude increases with the decrease of the quantum channel; while the amplitude of the spin current js,yx remains the same. Therefore we conclude that the effect of the quantum-channel number on the spin current js,xy is greater than that on the spin current js,yx. The strength of the Rashba spin-orbit coupling is tunable by the gate voltage, and the gate voltage can be varied experimentally, which implies a new method of detecting the. spin current. In addition, we can control the amplitude and the oscillation period of the spin current by controlling the number of the quantum channels. All these characteristics of the spin current will be very important for detecting and controlling the spin current, and especially for designing new spintronic devices in the future.

关键词： multichannel quantum wire Rashba spin-orbit coupling spin current heat produced by spin current

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Innovation and Practice of Internal Quality Assurance System in Higher Education Institutions -- Taking Jingzhou vocational and technical college as an Example

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教育技术与创新 2023年第3期5卷 1-10页

作者： Zhang Qing Fang Fengbo Tang Qinlin Yao Zhiheng Chen Chen School of Education City University of MacaoChina Research and Quality Management Office Jingzhou Vocational and Technical CollegeChina

Continuously improving the internal quality assurance system and promoting the innovative development of higher vocational education is a challenge that every higher vocational institution must solve on the road of diagnosis and *** address the current dilemma of building internal quality assurance systems in higher education institutions,this study utilizes a case study *** study takes Jingzhou vocational and technical college as the research object for ***:The excellent diagnosis and reform model and the effectiveness of diagnosis and reform in this school can provide new strategic ideas for the practice of diagnosis and reform for the high-quality development of higher education in Hubei.

关键词： diagnosis and improvement internal quality assurance system higher education research

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Mo-modified Pd/Al_2O_3 catalysts for benzene catalytic combustion

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Journal of Environmental Sciences 2014年第7期26卷 1481-1487页

作者： Zhanfeng He Zhanrong He Dan Wang Qifei Bo Ting Fan Yi Jiang Chengdu Institute of Organic Chemistry Chinese Academy of Sciences Graduate University of Chinese Academy of Sciences sichuan vocational and technical college

Mo-modified Pd/Al2O3catalysts were prepared by an impregnation method and tested for the catalytic combustion of benzene. The catalysts were characterized by N2 isothermal adsorption, X-ray diffraction（XRD）, X-ray photoelectron spectroscopy（XPS）, temperatureprogrammed desorption of NH3（NH3-TPD）, H2temperature-programmed reduction（H2-TPR）, and high-angle annular dark-field scanning transmission electron microscopy（HAADF-STEM）. The results showed that the addition of Mo effectively improved the activity and stability of the Pd/Al2O3catalyst by increasing the dispersion of Pd active components, changing the partial oxidation state of palladium and increasing the oxygen species concentration on the surface of catalyst. In the case of the Pd-Mo/Al2O3catalyst,benzene conversion of 90% was obtained at temperatures as low as 190°C, which was 45°C lower than that for similar performance with the Pd/Al2O3catalyst. Moreover, the 1.0% Pd-5% Mo/Al2O3catalyst was more active than the 2.0% Pd/Al2O3catalyst. It was concluded that Pd and Mo have a synergistic effect in benzene catalytic combustion.

关键词： Palladium molybdenum catalyst Molybdenum oxide Benzene Catalytic combustion Noble metal

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