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Non-isothermal Decomposition Kinetics of K(AHDNE)

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Chemical Research in Chinese Universities 2012年第5期28卷 878-881页

作者： LU lei xu Kang-zhen QIU qian-qian WANG Gang SONG Ji-rong ZHAO Feng-qi College of Chemistry and Chemical Engineering Yan'an UniversityYan'an 716000P.R.China School of Chemical Engineering Northwest UniversityXi'an 710069P.R.China Xi'an Modern Chemistry Research Institute Xi'an 710065P.R.China

The thermal behavior and non-isothermal decomposition kinetics of 1-amino-1-hydrazino-2,2-dinitro-ethylene potassium salt[K（AHDNE）] were studied under the non-isothermal conditions by different scanning calorimeter（DSC） method. The thermal behavior of K（AHDNE） presents three exothermic decomposition processes. The kinetic equation of the first thermal decomposition reaction obtained is dα/dT=（1019.63/β）3（1-α）[-ln（1-α）]2/3exp（-1.862× 105/RT）. The self-accelerating decomposition temperature（TSADT） and critical temperature of thermal explosion（Tb） of K（AHDNE） are 162.5 and 171.4 °C, respectively. K（AHDNE） has higher thermal stability than AHDNE.

关键词： 1-Amino-1-hydrazino-2 2-dinitroethylene(AHDNE) Potassium salt Non-isothermal decomposition kine- tics

先秦时期西南民族交往交流交融研究——以什邡古蜀铜戈铭文释读为例

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文史杂志 2025年第1期235卷 33-39页

作者：徐晨钱玉趾西南民族大学民族学与社会学学院四川省科学技术学会

四川什邡是古蜀腹地,什邡城关战国秦汉墓地编号为M59:21的AVI式铭文戈是从楚式戈演变而来的战国晚期蜀戈。戈上5个字符竖刻在胡部,系古蜀文字。古蜀族与彝族有亲缘关系。用彝文字符比对,借助“左言”(主语·宾语·谓语)语序,可以将什邡... 详细信息

四川什邡是古蜀腹地,什邡城关战国秦汉墓地编号为M59:21的AVI式铭文戈是从楚式戈演变而来的战国晚期蜀戈。戈上5个字符竖刻在胡部,系古蜀文字。古蜀族与彝族有亲缘关系。用彝文字符比对,借助“左言”(主语·宾语·谓语)语序,可以将什邡戈铭文释读为“虎(王)用以战斗的锋利铜戈”。铜戈也是中华民族共同体形成与发展的实物例证。

关键词：什邡铭文戈战国晚期铭文释读民族互融

Prescribed-Time Fully Distributed Nash Equilibrium Seeking Strategy in Networked Games

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IEEE/CAA Journal of Automatica Sinica 2024年第1期11卷 261-263页

作者： Cheng qian lei Ding the Institute of Advanced Technology for Carbon Neutrality College of Automation&the College of Artificial Intelligence Nanjing University of Posts and TelecommunicationsNanjing 210023China IEEE

Dear Editor, This letter is concerned with prescribed-time fully distributed Nash equilibrium seeking for networked games under directed graphs. An adaptive algorithm is proposed to ensure the convergence of all players to the Nash equilibrium without requiring any knowledge of global parameters. Moreover, it is theoretically proved that the convergence time of the proposed seeking strategy can be predefined based on practical requirements. Finally, a numerical example is presented to validate the effectiveness of the proposed method.

关键词： parameters seeking prescribed

颗粒物沉降影响下草/藻型湖区沉积物一水界面氮交换特征及机制

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湖泊科学 2025年第1期37卷 76-88页

作者：韩汶轩陈秋羽何煦谭立贤刘成张雷中国科学院南京地理与湖泊所湖泊与环境国家重点实验室南京211135 中国科学院大学北京100049 广西大学资源环境与材料学院南宁530004

富营养化湖泊水体中颗粒物的不断富集和沉降加剧了沉积物内源负荷。本文以太湖典型草、藻型湖区为研究对象,开展了为期一年的野外月度调查,分析了两种湖区水样、颗粒物和沉积物中各形态氮含量、赋存形式及其沉积物水界面交换特征,研究... 详细信息

富营养化湖泊水体中颗粒物的不断富集和沉降加剧了沉积物内源负荷。本文以太湖典型草、藻型湖区为研究对象,开展了为期一年的野外月度调查,分析了两种湖区水样、颗粒物和沉积物中各形态氮含量、赋存形式及其沉积物水界面交换特征,研究了颗粒物沉降对草、藻型湖区沉积物水界面氮赋存形态转变及迁移的影响。结果表明,草、藻型湖区水体总氮(TN)浓度年变化范围分别为0.50~1.51 mg/L(均值为(0.97±0.23)mg/L)和1.77~6.12 mg/L(均值为(3.67±1.36)mg/L),藻型湖区水体各形态氮浓度普遍高于草型湖区,且季节性变化更加显著。草、藻型湖区悬浮颗粒物中TN含量年均值分别为(6998.48±1413.87)和(5162.63±2205.13)mg/kg,沉积物TN平均含量分别为(4219.75±216.62)和(3187.88±103.07)mg/kg,呈现草型湖区显著高于藻型湖区、悬浮颗粒物显著高于沉积物的特征。氨氮(NH 3-N)是两个湖区悬浮颗粒物和沉积物中有效态氮的主要赋存形式,藻型湖区沉积物中NH 3-N的释放主要集中在夏季,而草型湖区则以夏、秋季为主。有效态氮高度富集的颗粒物不断沉降是造成沉积物中氮含量改变的重要原因,且藻型湖区有效态氮所占比例(5.17%)在藻类水华季节高于草型湖区(4.34%)。草型系统向藻型系统的转变可能会升高水体颗粒物浓度并加剧沉积物颗粒再悬浮过程,颗粒物沉降和再悬浮交替加剧了沉积物水界面处氮的交换过程,在未来的湖泊内源氮管理中应更加重视颗粒物的作用。

关键词：太湖草型湖区藻型湖区悬浮颗粒物内源氮负荷

Global Existence and Blow-up for Semilinear Wave Equations with Variable Coefficients

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Chinese Annals of Mathematics,Series B 2018年第4期39卷 643-664页

作者： qian lei Han YANG School of Mathematics Southwest Jiaotong University Chengdu 610031 China School of Transportation and Logistics Southwest Jiaotong University Chengdu 610031 China

The authors consider the critical exponent problem for the variable coefficients wave equation with a space dependent potential and source term. For sufficiently small data with compact support, if the power of nonlinearity is larger than the expected exponent, it is proved that there exists a global solution. Furthermore, the precise decay estimates for the energy, L^2 and L^(p+1) norms of solutions are also established. In addition, the blow-up of the solutions is proved for arbitrary initial data with compact support when the power of nonlinearity is less than some constant.

关键词： Semilinear wave equations Global existence Energy decay L^2 and L^p+1 estimates Blow up

Revolutionizing photothermal CO_(2)hydrogenation with ceria-based catalysts

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Nano Research 2025年第1期18卷 30-49页

作者： Zhaorui Zhang Xiao Han Junhong Zhang Yunyun Dong Jinsheng Zhao qian xu ingqiang Zhang School of Chemistry and Chemical Engineering Liaocheng UniversityLiaocheng 252059China Institute for Catalysis Hokkaido UniversityN-21W-10Sapporo 001-0021Japan National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230029China

In the context of achieving carbon neutrality,CO_(2)catalytic conversion technologies are effective in reducing atmospheric CO_(2)concentrations while simultaneously producing renewable *** approach is seen as a viable method for constructing a new carbon cycle,thereby effectively addressing the issue of global *** CO_(2)conversion has recently emerged as a promising research focus due to its high energy utilization efficiency,superior CO_(2)conversion,excellent product selectivity,mild operating conditions,low energy consumption and minimal operating *** oxide(CeO_(2))has been widely used in photothermal catalysis due to its unique chemical properties,particularly when used as a support material with supported metals,creating distinctive interfacial sites for catalytic *** an emerging star support in photothermal CO_(2)conversion,its contributions are equally significant and should not be ***,to our knowledge,there has been no comprehensive review of CeO_(2)applications in catalytic hydrogenation of CO_(2).In this paper,we summarize and discuss CeO_(2)-based materials for photothermal CO_(2)conversion to value-added *** research particularly focuses on the synthesis methods of CeO_(2)-supported catalysts,the history of CeO_(2)in photothermal catalysis,types of photothermal catalytic reactors,unique characterization methods for the photothermal catalysts and the photothermal CO_(2)hydrogenation reactions by CeO_(2)-based *** related to further challenges and future directions for photothermal CO_(2)hydrogenation are also provided.

关键词： CO_(2)neutrality hydrogenation photothermal catalysis ceria C1 chemistry

Coarse-to-fine waterlogging probability assessment based on remote sensing image and social media data

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Geo-Spatial Information Science 2021年第2期24卷 279-301,I0007页

作者： lei xu Ailong Ma State Key Laboratory of Information Engineering in Surveying Mapping and Remote SensingWuhan UniversityWuhanChina Collaborative Innovation Center of Geospatial Technology Wuhan UniversityWuhanChina

Urban waterlogging probability assessment is critical to emergency response and *** Sensing(RS)is a rich and reliable data source for waterlogging monitoring and evaluation through water body extraction derived from the pre-and post-disaster RS ***,RS images are usually limited to the revisit cycle and cloud *** solve this issue,social media data have been considered as another data source which are immune to the weather such as clouds and can reflect the real-time public response for disaster,which leads itself a compensation for RS *** this paper,we propose a coarse-to-fine waterlogging probability assessment framework based on multisource data including real-time social media data,near real-time RS image and historical geographic information,in which a coarse waterlogging probability map is refined by using the real-time information extracted from social media data to acquire a more accurate waterlogging ***,to generate a coarse waterlogging probability map,the historical inundated areas are derived from Digital Elevation Model(DEM)and historical waterlogging points,then the geographic features are extracted from DEM and RS image,which will be input to a Random Forest(RF)classifier to estimate the likelihood of ***,the real-time waterlogging-related information is extracted from social media data,where the Convolutional Neural Network(CNN)model is applied to exploit the semantic information of sentences by capturing the local and position-invariant features using convolution ***,fine waterlogging probability map scan be generated based on morphological method,in which real-time waterlogging-related social media data are taken as isolated highlight point and used to refine the coarse waterlogging probability map by a gray dilation pattern considering the distance-decay *** 2016 Wuhan waterlogging and 2018 Chengdu water-logging are taken as case studies to demonstrate the effective

关键词： Remote sensing social media urban waterlogging data fusion

Biomechanics of Musculoskeletal System and Its Biomimetic Implications： A Review

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Journal of Bionic Engineering 2014年第2期11卷 159-175页

作者： lei Ren Zhihui qian Luquan Ren School of Mechanical Aerospace and Civil Engineering University of Manchester Manchester M13 9PL UK Key Laboratory of Bionic Engineering (Ministry of Education China) Jilin University Changchun 130022 P. R. China

Biological musculoskeletal system （MSK）, composed of numerous bones, cartilages, skeletal muscles, tendons, ligaments etc., provides form, support, movement and stability for human or animal body. As the result of million years of selection and evolution, the biological MSK evolves to be a nearly perfect mechanical mechanism to support and transport the human or animal body, and would provide enormously rich resources to inspire engineers to innovate new technology and methodology to develop robots and mechanisms as effective and economical as the biological systems. This paper provides a general review of the current status of musculoskeletal biomechanics studies using both experimental and computational methods. This includes the use of the latest three-dimensional motion analysis systems, various medical imaging modalities, and also the advanced rigid-body and continuum mechanics musculoskeletal modelling techniques. Afterwards, several representative biomimetic studies based on ideas and concepts inspired from the structures and biomechanical functions of the biological MSK are dis- cussed. Finally, the major challenges and also the future research directions in musculoskeletal biomechanics and its biomimetic studies are proposed.

关键词： musculoskeletal system biomechanics multi-scale biomimetics biologically inspired robots and mechanisms

Jumbo Bionic Trabecular Metal Acetabular Cups Improve Cup Stability During Acetabular Bone Defect Reconstruction:A Finite Element Analysis Study

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Journal of Bionic Engineering 2023年第6期20卷 2814-2825页

作者： Jianlin Xiao Haowen xue Zhihui qian Shenghao xu Xianyue Shen Zhuo Zhang lei Ren Luquan Ren Department of Orthopedics China-Japan Union Hospital of Jilin UniversityChangchun130033China Key Laboratory of Bionic Engineering Ministry of Education Changchun130025China Department of Orthopedics The Second Hospital of Jilin UniversityChangchun130041China Department of Orthopedics The First Affiliated Hospital of University of Science and Technology of ChinaAnhui Provincial HospitalHefei230001China Weihai Institute for Bionics-Jilin University Weihai264400China

The biomechanical effects of acetabular revision with jumbo cups are *** study aimed to compare the biomechanical effects of bionic trabecular metal *** jumbo cups for the revision of acetabular bone *** designed and reconstructed American Academy of Orthopaedic Surgeons(AAOS)type I–III acetabular bone defect models using computed tomography scans of a man without acetabular bone *** implantation of titanium and trabecular metal jumbo cups was *** distribution and relative micromotion between the cup and host bone were assessed using finite element *** stress on the screws fixing the cups was also *** contact stress analysis showed that the peak contact stress between the titanium jumbo cup and the host bone was 21.7,20.1,and 23.8 MPa in the AAOS I–III models,respectively;the corresponding values for bionic tantalum jumbo cups decreased to 4.7,6.7,and 11.1 *** of the relative micromotion showed that the peak relative micromotion between the host bone and the titanium metal cup was 10.2,9.1,and 11.5μm in the AAOS I–III models,respectively;the corresponding values for bionic trabecular metal cups were 17.2,18.2,and 31.3μ*** peak contact stress on the screws was similar for the 2 cup types,and was concentrated on the screw ***,acetabular reconstruction with jumbo cups is biomechanically *** recommend trabecular metal cups due to their superior stress distribution and higher relative micromotion,which is within the threshold for adequate bone ingrowth.

关键词： Acetabular bone defect Finite element analysis Trabecular metal Jumbo cup