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Rare Metals 2021年第10期40卷 2657-2689页

作者： Chan li Dao-Hui Zhao hua-li long Ming li Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional MoleculesHubei Key Laboratory of Polymer MaterialsCollege of Chemistry and Chemical EngineeringHubei UniversityWuhan 430062China

The non-noble metal oxygen reduction reaction(ORR) catalysts prepared by carbonization of metal–organic framework(MOF) have attracted more and more attentions in the fields of fuel cells and metal-air batteries due to their unique intrinsic advantages such as high catalytic activity, low price, simple synthesis and good adaptability. Different from the study of traditional high active noble metal catalysts, this review systematically summarizes recent developments on non-noble metal(Fe,Co, Cu, Ni, Mn and Mo) ORR catalysts prepared by various MOFs carbonization in different metal centers. The effects of synthesis strategies and pyrolysis conditions on the catalyst properties are discussed. Meanwhile, the key parameters of catalytic performances(including active sites, dispersed state and specific surface area) are discussed and the prospect is presented. It is expected that this review will provide effective guidance for future studies on carbonized non-noble MOFs for ORR electrochemical catalyst.

关键词： Non-noble metal MOF Pyrolysis Catalyst ORR

Corrosion Resistance of High Performance Weathering Steel for Bridge Building Applications

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Journal of Iron and Steel Research International 2012年第6期19卷 59-63页

作者： CHEN Ai-hua XU Jian-qiu li Ran li hua-long Institute of Research of Iron and Steel Shasteel GroupZhangjiagang 215625JiangsuChina Chief Engineering Office Shasteel GroupZhangjiagang 215625JiangsuChina

The mechanical properties, corrosion resistance and microstructures of high performance steel （HPS） was investigated by tensile testing machine, Charpy V-Notch （CVN） testing machine, cyclic immersion corrosion tester, XRD, optical microscopy （OM）, scanning electron microscopy （SEM）, and electron probe micro-analyzer （EPMA）. The results showed that significant differences existed in the tensile strength, yield strength and impact toughness between HPS and PCS. After 72 h cyclic immersion accelerated corrosion test, the inner rust layer on HPS was com- posed of a-FeOOH phase and denser than that on PCS that was a mixture of a-FeOOH and Fe3 04. The rust formed on HPS provides better protection and HPS has lower corrosion rates than PCS. Copper and chromium in HPS en- rich in the rust layer and enhance the compactness of the rust layer. Based on the results of the accelerated corrosion tests and rust layer analysis, the roles of Cu and Cr against corrosion are discussed, providing HPS with chemical specification which has been industrially successful to produce weathering steel for bridge structure.

关键词： HPS corrosion resistancel microstructure mechanical property

Modeling of air quality with a modified two-dimensional Eulerian model: A case study in the Pearl River Delta (PRD) region of China

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Journal of Environmental Sciences 2007年第5期19卷 572-577页

作者： CHENG Yan-li BAI Yu-hua li Jin-long liU Zhao-rong College of Environmental Sciences Peking University Beijing 100871 China

A modified two-dimensional Eulerian air quality model was used to simulate both the gaseous and particulate pollutant concentrations during October 21-24, 2004 in the Pearl River Delta （PRD） region, China. The most significant improvement to the model is the added capability to predict the secondary organic aerosols （SOA） concentrations because of the inclusion of the SOA formation chemistry. The meteorological input data were prepared using the CALMET meteorological model. The concentrations of aerosol-bound species such as NO3^-, NH4^＋, SO4^2-, and SOA were calculated in the fine particle size range （〈2.5 μm）. The results of the two-dimensional model were compared to the measurements at the ground level during the PRD Intensive Monitoring Campaign （IMC）. Overall, there were good agreements between the measured and modeled concentrations of inorganic aerosol components and O3. Both the measured and the modeled results indicated that the maximum hourly O3 concentrations exceeded the China National Air Quality Standard. The predicted 24-h average SOA concentrations were in reasonable agreement with those predicted by the method of minimum OC/EC ratio.

关键词： air quality model numerical simulation secondary organic aerosol inorganic aerosol

A trade-off between antipredatory behavior and pairing competition produced by male-male tandem running in three Reticulitermes species

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Insect Science 2015年第4期22卷 560-568页

作者： Gang-hua li long liu Chao-liang Lei Qiu-Ying huang Hubei Insect Resource Utilization and Sustainable Pest Management Key Laboratory Huazhong Agricultural University Wuhan 430070 China

Due to the omnipresent risk of predation, termites have evolved many antipreda- tory behaviors. The two related species Reticulitermes speratus and R. chinensis have been demonstrated to use homosexual tandem running to decrease individual predation risk after shedding their wings. In this study, we tested risk of predation in the termite R. flaviceps, which is distantly related to the above two species. We determined that homosexual tandem running also led to low individual predation risk in dealates of R. flaviceps. Moreover, by combining a predation model with a competition model, we observed a typical trade-off phenomenon between antipredatory behavior and pairing competition produced by male- male tandem running in the above three Reticulitermes species. Our results indicated that male-male tandem running could effectively protect disadvantaged individuals from being caught, but disadvantaged individuals would be easily eliminated in pairing competition after male-male tandem running, suggesting that male-male tandem running can pro- mote population evolution in termites by repeatedly removing the relatively inferior male individuals.

关键词： antipredatory behavior pairing competition tandem running termites trade-off

Assessing the range of blasting-induced cracks in the surrounding rock of deeply buried tunnels based on the unified strength theory

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Journal of Central South University 2024年第7期31卷 2341-2364页

作者： li liang CHEN Jia-jun ZHAO lian-heng HE Ke-pei HU Shi-hong li hua-long School of Civil Engineering Central South UniversityChangsha 410075China Key Laboratory of Heavy-haul Railway Engineering Structure Ministry of EducationCentral South UniversityChangsha 410075China Hunan Provincial Key Laboratory for Disaster Prevention and Mitigation of Rail Transit Engineering Structure Central South UniversityChangsha 410075China

Blasting-induced cracks in the rock surrounding deeply buried tunnels can result in water gushing and rock mass collapse,posing significant safety ***,previous theoretical studies on the range of blasting-induced cracks often ignore the impact of the in-situ stress,especially that of the intermediate principal *** particle displacement−crack radius relationship was established in this paper by utilizing the blasthole cavity expansion equation,and theoretical analytical formulas of the stress−displacement relationship and the crack radius were derived with unified strength theory to accurately assess the range of cracks in deep surrounding rock under a blasting *** analysis showed that the crushing zone size was positively correlated with in-situ stress,intermediate principal stress,and detonation pressure,whereas negatively correlated with Poisson ratio and decoupling *** dilatancy angle-crushing zone size relationship exhibited nonmonotonic *** relationships in the crushing zone and the fracture zone exhibited opposite trends under the influence of only in-situ stress or intermediate principal *** the in-situ stress increased from 0 to 70 MPa,the rate of change in the crack range and the attenuation rate of the peak vibration velocity gradually slowed.

关键词： deep drilling and blasting cracks in surrounding rock unified strength theory intermediate principle stress in-situ stress cavity expansion dilatancy characteristics

A Temperature Prediction Model for Oil-immersed Transformer Based on Thermal-circuit Theory

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高压电器 2012年第11期48卷 1-6页

作者： WEI Ben-gang liN Jun TAN li GAO Kai liU Jia-yu li hua-long li Jiang-tao East China Electric Testing & Research Institute Shanghai 200437 China School of Electrical Engineering Xi'anJiaotong University Xi'an 710049 China State Key Laboratory of Electrical Insulation and Power Equipment Xi'an Jiaotong University Xi'an 710049 China

This paper proposed an improved temperature prediction model for oil-immersed *** influences of the environmental temperature and heat-sinking capability changing with temperature were *** calculating the heat dissipation from the transformer tank to surroundings,the average oil temperature was selected as the node value in the thermal *** new thermal models will be validated with the delivery experimental data of three transformers: a 220 kV-300 MV.A unit,a 110 kV40 MV.A unit and a 220 kV-75 MV.A ***,the results from the proposed model were also compared with two methods recommended in the IEC loading guide.

关键词： oil-immersed transformer temperature thermal-circuit theory

Effects of Coiling Temperature on Strength,Yield Ratio and Precipitation Behaviors of Hot Rolled High Strength Microalloyed Steel for Cold Forming

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Journal of Iron and Steel Research International 2011年第S1期18卷 572-575页

作者： XU Jian-qiu,JIA Yue-cai,li hua-long [Institute of Research of Iron and Steel (IRIS),Sha Steel,Zhangjiagang215625,Jiangsu,China] Inst Res Iron & Steel IRIS Zhangjiagang 215625 Jiangsu Peoples R China

Various hot rolling schedules were applied to a Nb,V,Ti contained HSLA *** temperature had crucial effects on not only yield strength,but also yield ratio and precipitation behavior.600Mpa yield strength is achieved when coiled at 450℃,which is 100Mpa higher than those coiled at 570℃.However,the low coiling temperature had adverse effect to increase yield ratio,which increased from 0.78 to 0.88 as coiling temperature dropped from 570℃ to 450℃.High resolution SEM analysis shows that sizes of Nb,V,Ti precipitates are affected by coiling *** (Nb,Ti)(C,N) precipitates up to 5μm are observed at higher coiling temperature and to decrease tensile strength,where high coiling temperature corresponds to low cooling *** strong cooling and coiling capacity of Shasteel’s 1450mm width hot rolling mill,these results indicate that strength and formability of the steel can be balanced when coiling temperature has been *** and microalloying costs can be reduced by efficiently utilizing the capacity of rolling *** inclusions are found to act as nucleus for Nb,V,Ti precipitates,contributing to coarsening of precipitates.

关键词： coiling temperature strength yield ratio precipitates inclusions

Active constituents and mechanisms of Respiratory Detox Shot, a traditional Chinese medicine prescription, for COVID-19 control and prevention: Network-molecular docking-LC–MS^E analysis

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Journal of Integrative Medicine 2020年第3期18卷 229-241页

作者： Zi-jia Zhang Wen-yong Wu Jin-jun Hou lin-lin Zhang Fei-fei li Lei Gao Xing-dong Wu Jing-ying Shi Rong Zhang hua-li long Min Lei Wan-ying Wu De-an Guo Kai-xian Chen Lewis A.Hofmann Zhong-hua Ci Shanghai Institute of Materia Medica Chinese Academy of SciencesShanghai 201203China University of Chinese Academy of Sciences Beijing 100049China World Health Science Organization LeesburgVA 20176USA

Objective: Lung-toxin Dispelling Formula No. 1, referred to as Respiratory Detox Shot(RDS), was developed based on a classical prescription of traditional Chinese medicine(TCM) and the theoretical understanding of herbal properties within TCM. Therapeutic benefits of using RDS for both disease control and prevention, in the effort to contain the coronavirus disease 2019(COVID-19), have been shown. However,the biochemically active constituents of RDS and their mechanisms of action are still unclear. The goal of the present study is to clarify the material foundation and action mechanism of ***: To conduct an analysis of RDS, an integrative analytical platform was constructed, including target prediction, protein–protein interaction(PPI) network, and cluster analysis;further, the hub genes involved in the disease-related pathways were identified, and the their corresponding compounds were used for in vitro validation of molecular docking predictions. The presence of these validated compounds was also measured in samples of the RDS formula to quantify the abundance of the biochemically active constituents. In our network pharmacological study, a total of 26 bioinformatic programs and databases were used, and six networks, covering the entire Zang-fu viscera, were constructed to comprehensively analyze the intricate connections among the compounds-targets-disease pathways-meridians of ***: For all 1071 known chemical constituents of the nine ingredients in RDS, identified from established TCM databases, 157 passed drug-likeness screening and led to 339 predicted targets in the constituent–target network. Forty-two hub genes with core regulatory effects were extracted from the PPI network, and 134 compounds and 29 crucial disease pathways were implicated in the target–constitu ent–disease network. Twelve disease pathways attributed to the Lung–Large Intestine meridians, with six and five attributed to the Kidney–Urinary Bladder and Stomach–Spleen meridian

关键词： Lung-toxin Dispelling Formula No.1 COVID-19 3C-like protease Network pharmacology Molecular docking Meridian tropism

Nonautonomous bright solitons and soliton collisions in a nonlinear medium with an external potential

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Chinese Physics B 2012年第5期21卷 145-152页

作者：李画眉葛龙何俊荣 Department of Physics Zhejiang Normal University

We present exact bright multi-soliton solutions of a generalized nonautonomous nonlinear Schroinger equation with time-and space-dependent distributed coefficients and an external potential which describes a pulse propagating in nonlinear media when its transverse and longitudinal directions are nonuniformly *** solutions exist in certain constraint conditions on the coefficients depicting dispersion,nonlinearity,and gain（loss）.Various shapes of bright solitons and interesting interactions between two solitons are *** applications of interest to the field and stability of the solitons are discussed.

关键词： generalized nonautonomous nonlinear Schrodinger equation multi-soliton solution,Fourier-synthesized optical lattice potential flying bird potential

四元硫属化合物La_2CuBiS_5的合成、结构及光学性能研究（英文）

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无机化学学报 2014年第10期30卷 2419-2424页

作者：赵华俊李龙华中国科学院福建物质结构研究所结构化学国家重点实验室福州350002 遵义师范学院化学化工学院黔北特色资源应用研究实验室遵义563002

通过高温固相反应合成了首例镧系-过渡金属-铋-四元硫属化合物:La2CuBiS5。该化合物属于正交晶系,空间群:Pnma。其结构含有沿b方向的一维[BiCuS56-]∞带,带与带之间被La3+离子隔开。一维[BiCuS56-]∞带由[CuS4]四面体双链与BiS6八面体... 详细信息

通过高温固相反应合成了首例镧系-过渡金属-铋-四元硫属化合物:La2CuBiS5。该化合物属于正交晶系,空间群:Pnma。其结构含有沿b方向的一维[BiCuS56-]∞带,带与带之间被La3+离子隔开。一维[BiCuS56-]∞带由[CuS4]四面体双链与BiS6八面体单链通过公顶点连接而成。漫反射光谱研究表明该化合物为半导体,能隙1.30 eV。理论研究表明其为直接半导体,光学能隙跃迁来源于S3p到La5d轨道的电子迁移。

关键词：铋硫属化合物晶体结构电子结构光学性质