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Synthesis and Crystal Structure of a Three-dimensional Cd(II) Coordination Polymer [Cd(μ_(1,3)-SCN)(μ_3-pco)]_n(pco=Pyrazine-2-carboxylate 4-oxide Anion)

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Chinese Journal of Structural Chemistry 2006年第8期25卷 937-939页

作者： shi jing-Min XU hong-Kun WU Chang-Ju LIU Lian-Dong Department of Chemistry Shandong Normal University Jinan 250014 China

The three-dimensional complex [Cd（μ1,3-SCN）（μ3-pco）]n has been synthesized with μ1,3-SCN^- and pco as mixed bridged ligands. The crystal belongs to monoclinic, space group P21/n with a = 10.3777（16）, b = 6.2592（9）, c = 13.150（2） A, β= 97.317（2）°, V= 847.2（2） A^3, Z= 4, C6H3CdN3O3S, Mr = 309.575, Dc = 2.427 g/cm^3, F（000） = 592 and μ = 2.804 mm^-1. The structure was refined to R = 0.0255 and wR = 0.0550 for 1712 observed reflections （1 〉 2σ（I））. In the crystal the Cd（Ⅱ） ions are coordinated by μ1,3-SCN^- and μ3-pco bridge ligands to form a three-dimensional structure.

关键词： synthesis crystal structure cadmium(Ⅱ) complex thiocyanate aromatic N-oxide

磐安县一季药材两季粮种植模式技术要点--以浙贝母-玉米-小番薯模式为例

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湖北植保 2024年第2期 82-84页

作者：陈江周巧钰石红静孔惠东黄鑫磐安县农业农村局浙江磐安322300

为进一步提升农业综合效益、提高土地利用率和土地产出率、增加农民收益,2022年9月至2023年9月在磐安县冷水镇畈潘潭村进行了浙贝母-玉米-小番薯模式田间试验,一季药材两季粮的轮作方式消除了贝母轮作障碍,相比一季药材一季粮(浙贝母-... 详细信息

为进一步提升农业综合效益、提高土地利用率和土地产出率、增加农民收益,2022年9月至2023年9月在磐安县冷水镇畈潘潭村进行了浙贝母-玉米-小番薯模式田间试验,一季药材两季粮的轮作方式消除了贝母轮作障碍,相比一季药材一季粮(浙贝母-西瓜和浙贝母-甜玉米-秋大豆)轮作方式,平均产值增加约6000元/667m^(2)。通过旱地新三熟种植试验,探究了适合磐安县高效种植业发展的新路子。

关键词：浙贝母药粮轮作连作障碍磐安县

Fine Mapping and Cloning of the Grain Number Per-Panicle Gene (Gnp4) on Chromosome 4 in Rice (Oryza sativa L.)

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Agricultural Sciences in China 2011年第12期10卷 1825-1833页

作者： ZHANG Zhan-ying LI Jin-jie YAO Guo-xin ZHANG hong-liang DOU Hui-jing shi hong-li SUN Xing-ming LI Zi-chao Key Laboratory of Crop Heterosis and Utilization Ministry of Agriculture/Beijing Key Laboratory of Crop Genetic Improvement ChinaAgricultural University Beijing 100193 P.R.China

Grain number per-panicle is one of the most important components for rice yield. Spikelets on the primary and secondary branches determine the grain number per-panicle in rice. In this study, we identified a natural mutant, gnp4, lack of lateral spikelet on the secondary branches in the field condition. In addition, the Gnp4 and Lax1-1 double mutant showed dramatically reduced secondary branches and spikelets in panicle at reproductive stage, and tillers at vegetative stage. By map-based cloning approach, and using four F2 segregating populations, the Gnp4 gene was finally mapped to a 10.7-kb region on the long arm of chromosome 4 in rice. In this region, only one gene was predicted, and genomic DNA sequencing of the 10.7-kb region showed no nucleotide differences between the mutant and wild type. Interestingly, we found that the methylation level of several cytosines in the promoter CpG islands region of the predicted gene in gnp4 were different from the wild type. Thus, we propose that the DNA methylation changes at these sites may induce to decrease expression level of Gnp4, consequently, resulting in phenotypic variation.

关键词： rice gnp4 laxl-1 grain number per-panicle methylation

An uncertainty investigation for liner impedance eduction methods

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Chinese Journal of Aeronautics 2024年第3期37卷 49-59页

作者： Weihao shi Xiaodong jing School of Energy and Power Engineering Beihang UniversityBeijing 100191China

Impedance eduction methods have been developed for decades to meet the increasing need for high-quality impedance data in the design and optimization of acoustic *** this end,it is important to fully investigate the uncertainty problem,to which only limited attention has been devoted so *** paper considers the possibility of acoustically-induced structural vibration as a nonnegligible uncertainty or error source in impedance eduction *** the frequency moves away from the resonant frequency,with the increase in the value of cavity reactance,the acoustic particle velocity inside liner orifices possibly decreases to the extent comparable to the vibration velocity of liner facing ***,the acoustically-induced vibration,although generally being weak except at the inherent structural frequencies,may considerably affect the impedance eduction results near the anti-resonant frequency where the liner has poor *** demonstrate the effect of structural vibration,the vibration velocity of liner facing sheet is estimated from the experimentally educed admittance of the liner samples whose orifices are sealed with ***,a three-dimensional numerical model is set up,in which normal particle velocity is introduced over the solid portion of liner facing sheet to imitate structural vibration,rather than directly solving the acoustic-structural coupling *** shown by the results,the vibration of liner facing sheet,whose velocity is as small as estimated by the experiment,can result in anomalous deviation of the educed impedance from the impedance model near the anti-resonant *** trend that the anomalous deviation varies with frequency is numerically captured.

关键词： Impedance eduction Uncertainty analysis Acoustically-induced structural vibration Anti-resonant frequency Perforated liner

A Review on Engineering Design for Enhancing Interfacial Contact in Solid-State Lithium–Sulfur Batteries

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Nano-Micro Letters 2024年第4期16卷 219-252页

作者： Bingxin Qi Xinyue hong Ying Jiang jing shi Mingrui Zhang Wen Yan Chao Lai School of Chemistry and Materials Science Jiangsu Normal UniversityXuzhou 221116JiangsuPeople’s Republic of China

The utilization of solid-state electrolytes(SSEs)presents a promising solution to the issues of safety concern and shuttle effect in Li–S batteries,which has garnered significant interest ***,the high interfacial impedances existing between the SSEs and the electrodes(both lithium anodes and sulfur cathodes)hinder the charge transfer and intensify the uneven deposition of lithium,which ultimately result in insufficient capacity utilization and poor cycling ***,the reduction of interfacial resistance between SSEs and electrodes is of paramount importance in the pursuit of efficacious solid-state *** this review,we focus on the experimental strategies employed to enhance the interfacial contact between SSEs and electrodes,and summarize recent progresses of their applications in solidstate Li–S ***,the challenges and perspectives of rational interfacial design in practical solid-state Li–S batteries are outlined as *** expect that this review will provide new insights into the further technique development and practical applications of solid-state lithium batteries.

关键词： Solid-state lithium–sulfur batteries Solid-state electrolytes Electrode/electrolyte interface Interfacial engineering Enhancing interfacial contact

Parametric“non-nested”discriminants for multiplicities of univariate polynomials

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Science China Mathematics 2024年第8期67卷 1911-1932页

作者： Hoon hong jing Yang Department of Mathematics North Carolina State UniversityRaleighNC 27695USA SMS-HCIC-School of Mathematics and Physics Center for Applied Mathematics of GuangxiGuangxi Minzu UniversityNanning 530006China

We consider the problem of complex root classification,i.e.,finding the conditions on the coefficients of a univariate polynomial for all possible multiplicity structures on its complex *** is well known that such conditions can be written as conjunctions of several polynomial equalities and one inequality in the *** polynomials in the coefficients are called discriminants for *** is also known that discriminants can be obtained using repeated parametric greatest common *** resulting discriminants are usually nested determinants,i.e.,determinants of matrices whose entries are determinants,and so *** this paper,we give a new type of discriminant that is not based on repeated greatest common *** new discriminants are simpler in the sense that they are non-nested determinants and have smaller maximum degrees.

关键词： parametric polynomial complex roots discriminant multiplicity resultant

Hierarchical Privacy Protection Model in Advanced Metering Infrastructure Based on Cloud and Fog Assistance

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Computers, Materials & Continua 2024年第8期80卷 3193-3219页

作者： Linghong Kuang Wenlong shi jing Zhang School of Computer Science and Mathematics Fujian University of TechnologyFuzhou350118China Fujian Provincial Key Laboratory of Big Data Mining and Applications Fuzhou350118China

The Advanced Metering Infrastructure(AMI),as a crucial subsystem in the smart grid,is responsible for measuring user electricity consumption and plays a vital role in communication between providers and ***,with the advancement of information and communication technology,new security and privacy challenges have emerged for *** address these challenges and enhance the security and privacy of user data in the smart grid,a Hierarchical Privacy Protection Model in Advanced Metering Infrastructure based on Cloud and Fog Assistance(HPPM-AMICFA)is proposed in this *** proposed model integrates cloud and fog computing with hierarchical threshold encryption,offering a flexible and efficient privacy protection solution that significantly enhances data security in the smart *** methodology involves setting user protection levels by processing missing data and utilizing fuzzy comprehensive analysis to evaluate user importance,thereby assigning appropriate protection ***,a hierarchical threshold encryption algorithm is developed to provide differentiated protection strategies for fog nodes based on user IDs,ensuring secure aggregation and encryption of user *** results demonstrate that HPPM-AMICFA effectively resists various attack strategies while minimizing time costs,thereby safeguarding user data in the smart grid.

关键词： AMI cloud and fog assistance fuzzy comprehensive analysis hierarchical threshold encryption

Defect chemistry for extrinsic doping in ductile semiconductor α-Ag_(2)S

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Journal of Materiomics 2024年第6期10卷 1270-1278页

作者： Hexige Wuliji Kunpeng Zhao Huirong jing Runxin Ouyang Yu Yang Tian-Ran Wei hong Zhu Xun shi State Key Laboratory of Metal Matrix Composites School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai200240China University of Michigan-Shanghai Jiao Tong University Joint Institute Shanghai Jiao Tong UniversityShanghai200240China State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai200050China

As a new type of inorganic ductile semiconductor,silver sulfide(α-Ag_(2)S)has garnered a plethora of interests in recent years due to its promising applications in flexible ***,the lack of detailed defect calculations and chemical intuition has largely hindered the optimization of material's *** this study,we systematically investigate the defect chemistry of extrinsic doping inα-Ag_(2)S using first-principles *** computationally examine a broad suite of 17 dopants and find that all aliovalent elements have extremely low doping limits(<0.002%)in α-Ag_(2)S,rendering them ineffective in tuning the electron *** contrast,the isovalent elements Se and Te have relatively high doping limits,being consistent with the experimental *** the dopant Se or Te itself does not provide additional electrons,its introduction has a significant impact on the band gap,the band-edge position,and especially the formation energy of Ag interstitials,which effectively improve the electron concentrations by 2–3 orders of *** size effects of Se and Te doping are responsible for the more favorable Ag interstitials in Ag_(2)S_(0.875)Se_(0.125) and Ag_(2)S_(0.875)Te_(0.125) with respect to pristine *** work serves as a theoretical foundation for the rational design of Ag_(2)S-based functional materials.

关键词： Defect chemistry Extrinsic doping Thermoelectric Silver sulfide First-principles

Quantifying structural distortion manipulation for desired perovskite phase:PartⅠ.Paradigm demonstration in tungsten oxides

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Journal of Materiomics 2024年第2期10卷 293-303页

作者： Cheng Fang hong Wang Siqi shi State Key Laboratory of Green Building Materials China Building Materials AcademyBeijing100024China Beijing Key Laboratory of Solar Energy and Building Energy-saving Glass Materials Processing Technology China Building Materials AcademyBeijing100024China Materials Genome Initiative Center Shanghai Jiao Tong UniversityShanghai200240China School of Materials Science and Engineering Shanghai Jiao Tong UniversityShanghai200240China School of Materials Science and Engineering Shanghai UniversityShanghai200444China Materials Genome Institute Shanghai UniversityShanghai200444China

Slight distortions can cause dramatic changes in the properties of crystalline perovskite materials and their *** to the numerous types of distortions and unclarified distortion-structure relations,a quantitative distortion manipulation for the desired crystalline phase of perovskite materials suitable for various application remains ***,by establishing parameter sets to systematically describe the types,magnitudes and positional relations involved in distortions,we are able to interpret the structural regulations and manipulation strategies in 7 reported crystal *** the con-struction of distortion-phase-property functional curves,we further propose a paradigm to quantify the structural distortion manipulation for desired perovskite *** the example of perovskite-like tungsten oxides,we successfully quantify their volume shrinkage and symmetry increase during *** work verifies that the complicated research and development of perovskite materials can be simplified into a mathematical problem solving process,which will inspire researchers with different backgrounds to participate,especially mathematicians and computer scientists.

关键词： Distortion manipulation Distortion-phase-property function Coordination polyhedron Tungsten oxide Perovskite