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Nano Research 2024年第3期17卷 1636-1645页

作者： Peng Liu Yan Xu Bohan Li yuchi zhang Hongzhou Lian Jun Lin Department of Chemistry College of SciencesNortheastern UniversityShenyang 110819China State Key Laboratory of Rare Earth Resource Utilization Chang Chun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China

Construction of lead halide perovskite nanocrystals(LHP NCs)heterostructures is essential to obtain highly stable photoluminescence and expand their applications.Herein,a novel self-assembly strategy combining with a solvent-free thermal-assisted synthesis and a water-triggered reaction is developed to subsequently grow BaWO_(4)/CsPbX_(3)/CsPb_(2)X_(5)(X=Cl,Br,I)heterostructures at low nucleation temperature with high crystallinity.The as-obtained ternary BaWO_(4)/CsPbX_(3)/CsPb_(2)X_(5)(X=Cl,Br,I)heterostructures exhibit remarkably enhanced panchromatic emission and ultrastable luminescence ascribing to the low-defect growth based on lattice matching.Stable white light-emitting diodes(WLEDs)have been constructed with a high correlated color temperature(CCT)of 7225 K and luminous efficiency of 74.4 lm·W-1.Ln^(3+)-doped BaWO_(4)/CsPbX_(3)/CsPb_(2)X_(5)(Ln^(3+)=Eu^(3+),Tb^(3+),Dy^(3+),Sm^(3+),Yb^(3+)/Er^(3+))nanocomposites are further designed with excitation-dependent photoluminescence and thermochromic properties,making them excellent candidates for high-level anti-counterfeiting and encryption.This work offers a green and universal approach in assembling CsPbX_(3)(X=Cl,Br,I)on lattice-matched tungstate with adjustable panchromatic emission for versatile optical applications.

关键词： inorganic lead halide perovskites solvent-free synthesis panchromatic emission anti-counterfeiting and encryption application

Hierarchical under frequency load shedding scheme for inter-connected power systems

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Protection and Control of Modern Power Systems 2023年第2期8卷 292-303页

作者： Guowei Cai Shuyu Zhou Cheng Liu yuchi zhang Shujia Guo Zhichong Cao School of Electrical Engineering Northeast Electrical Power UniversityJilin 132012China

Severe disturbances in a power network can cause the system frequency to exceed the safe operating range.As the last defensive line for system emergency control,under frequency load shedding(UFLS)is an important method for preventing a wide range of frequency excursions.This paper proposes a hierarchical UFLS scheme of“centralized real-time decision-making and decentralized real-time control”for inter-connected systems.The centralized decision-layer of the scheme takes into account the importance of the load based on the equivalent transformation of kinetic energy(KE)and potential energy(PE)in the transient energy function(TEF),while the load PE is used to determine the load shedding amount(LSA)allocation in different loads after faults in real-time.At the same time,the influence of inertia loss is considered in the calculation of unbalanced power,and the decentralized control center is used to implement the one-stage UFLS process to compensate for the unbalanced power.Simulations are carried out on the modified New England 10-generator 39-bus system and 197-bus system in China to verify the performance of the proposed scheme.The results show that,compared with other LSA allocation indicators,the proposed alloca-tion indicators can achieve better fnadir and td.At the same time,compared with other multi-stage UFLS schemes,the proposed scheme can obtain the maximum fnadir with a smaller LSA in scenarios with high renewable energy sources(RES)penetration.

关键词： Hierarchical under frequency load shedding Centralized real-time decision-making and decentralized real-time control Transient energy function Kinetic energy Potential energy

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基于梵文本的《集论》文献学释疑

世界宗教文化 2024年第2期 174-181页

作者：张与弛华中科技大学哲学学院

《大乘阿毗达磨集论》是早期瑜伽行派重要的文献之一,汉、藏皆有译传。《集论》(部分)《集论释》的梵文本先后于1947、1976年出版,《集论》的文献性质、篇章结构、成书年代及诸释论的作者归属等问题开始得到学界的关注。2011年新发现的... 详细信息

《大乘阿毗达磨集论》是早期瑜伽行派重要的文献之一,汉、藏皆有译传。《集论》(部分)《集论释》的梵文本先后于1947、1976年出版,《集论》的文献性质、篇章结构、成书年代及诸释论的作者归属等问题开始得到学界的关注。2011年新发现的《集论》(部分)《杂集论》梵文写本的校订出版,为解答上述文献学问题提供了充实的文献材料。本文结合新出梵语文献、综合各家研究,认为《集论》乃多人编纂而成;其所收录材料中较早的部分与《瑜伽师地论》最古之文献层同时,较晚的部分则晚于《摄大乘论》,但不晚于《中边分别论》。《集论释》的作者是师子觉,《杂集论》的编纂者是安慧。

关键词：《集论》《集论释》《杂集论》安慧阿赖耶识

Bromine and oxygen redox species mediated highly selective electro-epoxidation of styrene

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Organic Chemistry Frontiers 2022年第2期9卷 436-444页

作者： yuchi zhang Asma Iqbal Jiantao Zai Shu-Yu zhang Hongran Guo Xuejiao Liu Ibrahim ul Islam Hira Fazal Xuefeng Qian Shanghai Electrochemical Energy Devices Research Center School of Chemistry and Chemical Engineering and State Key Laboratory of Metal Matrix CompositesShanghai Jiao Tong University Shanghai200240P.R.China

Olefin epoxidation is an essential transformation and arouses great interest among the scientific community for the key role of epoxide in the chemical industry.Traditional methods suffer from harmful oxidants and require harsh operating conditions and complex separation processes.Electro-epoxidation through bromine redox reactions is an eco-friendly strategy.However,the lack of efficient electrodes always limits the selectivity of epoxidation and results in massive energy consumption.Herein,we found that GF-CoS_(2)/CoS heterostructures anchored on graphite felt(GF-CoS_(2)/CoS)can efficiently facilitate the generation of bromine redox species on the anode.The synergistic cooperation between the bromine redox species and oxygen redox species(generated on a graphite rod cathode)can establish a benign electro-epoxidation system for olefin substrates in an ambient environment.Under the optimized reaction conditions,the epoxidation of styrene can achieve a yield of 97% at 30 mA cm^(-2).Importantly,the applied voltage(4-5 V)is roughly half of the Pt-based electrode system(7.8-9.3 V),hence,saving half of the energy.We demonstrated that our proposed strategy could also be applied to other olefins.Because of the simple,sustainable,and economic advantages of the epoxidation process,we believe this strategy is highly desirable for technical applications.

关键词： redox epoxidation styrene

Phase evolution process and hydrogen storage performances of V72Ti18Cr10 alloy prepared by Co-precipitation-reduction method

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Progress in Natural Science:Materials International 2022年第4期32卷 407-414页

作者： Yaobin Han Chaoling Wu Qian Wang Derui Sun Wenyu Cheng Xiangyang Li yuchi zhang Xingzhong Cao Yigang Yan Yao Wang Yungui Chen College of Materials Science and Engineering Sichuan University Engineering Research Center of Alternative Energy Materials & Devices Ministry of Education Multi-discipline Research Division Institute of High Energy Physics Chinese Academy of Sciences Institute of New Energy and Low-Carbon Technology Sichuan University

The V72Ti18Cr10alloy was prepared by a co-precipitation-reduction method in order to consume less energy during whole-life alloy manufacturing, and the phase evolution process in hydrogenation/dehydrogenation process was investigated. The structure refinement analysis of the alloy contented with 1 wt% hydrogen after hydrogenation shows that BCC phase, BCC-hydride phase and FCC phase coexisted, but little BCT phase was found. It indicates that the phase evolution process during hydrogenation was BCC→ BCC-hydride→ FCC,nevertheless the formation of BCT phase was restrained. The limited particle sizes of the alloy in the range of 0.1–5 μm and fewer defects than the normal alloy ingot contributed to the suppression of BCT formation. The annealed alloy, which had similar particle sizes with the unannealed alloy, has less unevenness of the compositions than the unannealed alloy, and the annealed alloy showed flatter plateau in the hydrogenation PCT(pressure-composition-temperature) curves. However, the BCT phase in the annealed alloy appeared in its dehydrogenation process owing to the produced defects during the following dehydrogenation and the hydrogenation process. The alloy with the limited particle sizes even in the range from 0.1 μm to 5 μm could not prevent the generation of BCT phase in the dehydrogenation process.

关键词： V-Ti-Cr alloy Co-precipitation-reduction Phase evolution process Hydrogen storage performance

High power and stable P-doped yolk-shell structured Si@C anode simultaneously enhancing conductivity and Li^(+)diffusion kinetics

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Nano Research 2021年第4期14卷 1004-1011页

作者： Ming Chen Qinnan Zhou Jiantao Zai Asma Iqbal TsegayeTadesse Tsega Boxu Dong Xuejiao Liu yuchi zhang Changyu Yan Liang Zhao Ali Nazakat SharelPeisan E CheeTongJohn Low Xuefeng Qian Shanghai Electrochemical Energy Devices Research Center School of Chemistry and Chemical Engineering and State Key Laboratory oj Metal Matrix CompositesShanghai Jiao Tong UniversityShanghai 200240China Warwick Electrochemical Engineering Group WMGEnergy Innovation CentreUniversity of WarwickCV47ALUK School of Health&Life Sciences Teesside UniversityMiddlesbroughTS13BXUK

Silicon is a low price and high capacity ancxje material for lithium-ion batteries.The yolk-shell structure can effectively accommodate Si expansion to improve stability.However,the limited rate performance of Si anodes can't meet people's growing demand for high power density.Herein,the phosphorus-doped yolk-shell Si@C materials(P-doped Si@C)were prepared through carbon coating on P-doped Si/SiO_(x)matrix to obtain high power and stable devices.Therefore,the as-prepared P-doped Si@C electrodes delivered a rapid increase in Coulombic efficiency from 74.4%to 99.6%after only 6 cycles,high capacity retention of-95%over 800 cycles at 4 A·g^(-1),and great rate capability(510 mAh·g^(-1)at 35 A·g^(-1)).As a result,P-doped Si@C anodes paired with commercial activated carbon and LiFePO_(4)cathode to assemble lithium-ion capacitor(high power density of〜61,080 W·kg^(-1)at 20 A·g^(-1))and lithium-ion full cell(good rate performance with 68.3 mAh·g^(-1)at 5 C),respectively.This work can provide an effective way tofurther improve power density and stability for energy storage devices.

关键词： P-doped yolk-shell structured Si@C anode excellent rate performance long life lithium-ion battery high power full cell

韭菜迟眼蕈蚊在北柴胡种植地空间格局的初步研究

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陕西农业科学 2024年第2期70卷 102-106页

作者：强磊张羽翅王文光杨凌职业技术学院陕西杨凌712100 略阳县中药材产业发展服务中心陕西略阳724300

为研究韭菜迟眼蕈蚊在北柴胡种植地中的空间格局,2022年5~6月对韭菜迟眼蕈蚊成、幼虫在略阳北柴胡种植地中的空间分布情况进行调查,采用频次比较法对调查结果进行多种分布型的拟合计算。结果表明在北柴胡种植地中,韭菜迟眼蕈蚊幼、成虫... 详细信息

为研究韭菜迟眼蕈蚊在北柴胡种植地中的空间格局,2022年5~6月对韭菜迟眼蕈蚊成、幼虫在略阳北柴胡种植地中的空间分布情况进行调查,采用频次比较法对调查结果进行多种分布型的拟合计算。结果表明在北柴胡种植地中,韭菜迟眼蕈蚊幼、成虫的空间格局均为聚集型分布,符合负二项分布。韭菜迟眼蕈蚊成虫在北柴胡种植地中主要集中在植株顶部上方飞行,植株顶部上方0至30.00 cm高度内的成虫占比达到71.51%,其中在植株顶部上方约15.00 cm处飞行的成虫最多,粘虫板粘附成虫数量达到10.6头/板。

关键词：韭菜迟眼蕈蚊北柴胡空间格局

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外水压力作用下伸缩缝防渗体系数值模拟研究

科技资讯 2024年第2期22卷 135-138,243页

作者：张宇弛王雪张晨辰赵颖杰浙江同济科技职业学院浙江杭州311231

基于内聚力模型,建立了复合型防渗体系的有限元计算模型,探讨了在外水压力作用下防渗体系的剥离破坏过程。研究表明,表面涂层厚度、嵌缝深度与防渗体系抵抗变形能力成正比;随着嵌缝深度的增加,防渗体系抵抗水压变形能力的增强幅度越小,... 详细信息

基于内聚力模型,建立了复合型防渗体系的有限元计算模型,探讨了在外水压力作用下防渗体系的剥离破坏过程。研究表明,表面涂层厚度、嵌缝深度与防渗体系抵抗变形能力成正比;随着嵌缝深度的增加,防渗体系抵抗水压变形能力的增强幅度越小,涂层厚度对抵抗水压变形能力的增强幅度影响更小;防渗体系的破坏起始点有两处,当嵌缝材料厚度较小时,破坏起始点在聚脲表面涂层与混凝土的接合处;当嵌缝材料厚度较大时,破坏起始点在嵌缝材料与混凝土黏接层下部。通过定量分析,为抵抗1 MPa的水压,推荐内嵌材料深度至少1.5 cm、表面封闭层厚度至少2 mm。

关键词：输水隧洞内聚力聚脲防渗

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铝熔化炉面向双碳目标的发展方向及案例介绍

工业炉 2024年第2期46卷 38-42页

作者：岳云辉张宇驰张景辉肖广信沈阳东大三建工业炉制造有限公司

介绍了一种铝合金熔化炉面向双碳目标开发的新炉型——混合动力熔化炉及S-MIC纯电熔化炉，通过新、旧炉型各类数据的对比表明新炉型有望成为2030年碳达峰任务不可或缺的设备。强调为实现2060年碳中和目标，应该加快推进清洁能源和电能... 详细信息

介绍了一种铝合金熔化炉面向双碳目标开发的新炉型——混合动力熔化炉及S-MIC纯电熔化炉，通过新、旧炉型各类数据的对比表明新炉型有望成为2030年碳达峰任务不可或缺的设备。强调为实现2060年碳中和目标，应该加快推进清洁能源和电能替代化石能源等燃料，并事先做好相关调研及导入准备工作。

关键词：铝合金熔化炉双碳目标混合动力熔化炉 S-MIC纯电熔化炉

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西洋参的化学成分和药理作用研究进展

中医药学报 2024年第4期52卷 99-104页

作者：于晓艳张宇弛方粟一葛鹏玲黑龙江中医药大学黑龙江哈尔滨150040 日本岛根大学医学部日本岛根693-8501

西洋参作为名贵中药材,具有补气滋阴、清热生津之功效,临床应用广泛。研究表明,西洋参的主要化学成分有皂苷类、多糖类、有机酸类等,具有抗肿瘤、抗心律失常、抗氧化应激等药理作用。本文归纳了西洋参化学成分和药理作用的最新研究进展... 详细信息

西洋参作为名贵中药材,具有补气滋阴、清热生津之功效,临床应用广泛。研究表明,西洋参的主要化学成分有皂苷类、多糖类、有机酸类等,具有抗肿瘤、抗心律失常、抗氧化应激等药理作用。本文归纳了西洋参化学成分和药理作用的最新研究进展,分析了目前西洋参研究存在的不足,旨在为西洋参的进一步深入研究和临床应用提供参考。

关键词：西洋参化学成分药理作用研究进展

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