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NITROGEN-OXYGEN COMPLEXES IN SIliCON AND THEIR DONOR ACTION

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中国有色金属学会会刊：英文版 1999年第2期9卷 151-157页

作者： liu, Peidong li, xiaojun Zhejiang Univ Hangzhou China

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关键词： nitrogenoxygen complexesnitrogennew donorCZ silicon

对数动态骨架本构模型的多维实现及其在ABAQUS中的应用

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岩土工程学报 2025年第1期47卷 192-199页

作者：董青陈苏李小军董云陈亚东周正华朱俊淮阴工学院建筑工程学院江苏淮安223003 北京工业大学城建学部北京100124 南京工业大学交通运输工程学院江苏南京210009

对数动态骨架本构以对数函数作为骨架曲线,引入“修正动骨架曲线”和“阻尼比退化系数”的概念,考虑试验阻尼对滞回曲线的影响,实现试验阻尼和滞回阻尼在数学上自洽的非线性动力本构。该本构只适用于一维土层场地时域非线性地震反应分... 详细信息

对数动态骨架本构以对数函数作为骨架曲线,引入“修正动骨架曲线”和“阻尼比退化系数”的概念,考虑试验阻尼对滞回曲线的影响,实现试验阻尼和滞回阻尼在数学上自洽的非线性动力本构。该本构只适用于一维土层场地时域非线性地震反应分析。基于对数动态骨架本构函数关系式,给出对数动态骨架参数的求解方法,并推导出加卸载曲线的时变切线剪切模量。通过ABAQUS软件的操作平台和等效剪应变算法,开发了基于对数动态骨架本构模型的显式子程序模块,该模型适用于二维和三维土层场地非线性地震反应分析。选取含软弱淤泥质土层场地作为计算模型,将从基岩输入不同加速度峰值的EI centro地震动的数值模拟结果进行对比,验证可考虑土体阻尼效应的对数动态骨架本构以及开发子程序的合理性和可用性。

关键词：对数动骨架本构阻尼比场地地震反应时变切线剪切模量

Probabilistic prediction on three-dimensional roughness of discontinuity based on two-dimensional traces under rock tunnel excavation based on Bayesian theory

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Underground Space 2024年第1期14卷 338-356页

作者： Qi Zhang Yuechao Pei xiaojun Wang xiaojun li Yixin Shen School of Civil Engineering Southeast UniversityNanjing 211189China Department of Geotechnical Engineering College of Civil EngineeringTongji UniversityShanghai 200092China

Three-dimensional(3D)roughness of discontinuity affects the quality of the rock mass,but 3D roughness is hard to be measured due to that the discontinuity is invisible in the ***-dimensional(2D)roughness can be calculated from the visible traces,but it is difficult to obtain enough quantity of the traces to directly derive 3D roughness during the tunnel *** this study,a new method using Bayesian theory is proposed to derive 3D roughness from the low quantity of 2D roughness *** more accurately calculating 3D roughness,a new regression formula of 2D roughness is established firstly based on wavelet *** new JRC3D prediction model based on Bayesian theory is then developed,and Markov chain Monte Carlo(MCMC)sampling is adopted to process JRC3D prediction *** discontinuity sample collected from the literature is used to verify the proposed *** groups with the sampling size of 2,3,4,and 5 of each group are randomly sampled from JRC2D values of 170 profiles of the discontinuity,*** research results indicate that 100%,90%,85%,and 60%predicting JRC3D of the sample groups corresponding to the sampling size of 5,4,3,and 2 fall into the tolerance interval[JRC_(true)–1,JRC_(true)+1].It is validated that the sampling size of 5 is enough for predicting *** sensitivities of sampling results are then analyzed on the influencing factors,which are the correlation function,the prior distribution,and the prior *** discontinuity across the excavation face at ZK78+67.5 of Daxiagu tunnel is taken as the tunnel engineering application,and the results further verify that the predicting JRC3D with the sampling size of 5 is generally in good agreement with JRC3D true values.

关键词： Rock discontinuity Joint roughness coefficient Tunnel excavation Bayesian theory Markov chain Monte Carlo sampling

Superderivation Algebras of Modular lie Superalgebras of ■-Type

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Chinese Annals of Mathematics,Series B 2015年第3期36卷 447-466页

作者： Xiaoning XU xiaojun li School of Mathematics Liaoning University

The authors consider a family of finite-dimensional lie superalgebras of C-type over an algebraically closed field of characteristic p 〉 3. It is proved that the lie superalgebras of C-type are simple and the spanning sets are determined. Then the spanning sets are employed to characterize the superderivation algebras of these lie superalgebras. Finally, the associative forms are discussed and a comparison is made between these lie superalgebras and other simple lie superalgebras of Cartan type.

关键词： Modular lie superalgebras Z-graded lie superalgebras Superderivationalgebras

Impact of Spatial Scale and Building Exposure Distribution on Earthquake Insurance Rates:A Case Study in Tangshan,China

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International Journal of Disaster Risk Science 2023年第1期14卷 64-78页

作者： Pan Zhang xiaojun li Chen liu Institute of Geophysics China Earthquake AdministrationBeijing100081China Key Laboratory of Urban Security and Disaster Engineering of China Ministry of Education Beijing University of TechnologyBeijing100124China Institute of Disaster Prevention Sanhe065201China China Re Catastrophe Risk Management Company Ltd. Beijing100033China

In order to examine the effect of spatial scale and building exposure distribution on the pure rate of earthquake catastrophe insurance,this study described three modules for rate determination,put forward the general assumptions and principles for calculating the pure insurance rate,and introduced three types of building distribution and their *** Tangshan City of Hebei Province in China as an example,we analyzed the pure rate of regional earthquake insurance in terms of spatial scale and building exposure distribution by using the method of control *** results show that for districts(or counties)with large differences in seismic risk,the risk areas can be further divided to apply differential *** areas with a diverse distribution of potential earthquake source areas and large differences in building density,there is a risk of overestimating or underestimating the pure rate of earthquake insurance when buildings are distributed evenly or partially *** violates the break-even principle of rate *** study also provides a reference for earthquake catastrophe insurance companies to choose the spatial scale and the detailed level of exposure distribution in rate determination.

关键词： Catastrophe insurance Earthquake exposure Premium rate Spatial scale Tangshan China

Analysis of the Influence of Oxygen Enrichment in the Blast on Temperature Field and NO_(x)Generation near the Burner in Reheating Furnace

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Frontiers in Heat and Mass Transfer 2024年第3期22卷 719-732页

作者： xiaojun li Fuyong Su School of Energy and Environmental Engineering University of Science&Technology BeijingBeijing100083China

In order to study the effect of oxygen-enriched combustion technology on the temperature field and NOX emission in the continuous heating furnace,this paper studies the oxygen-enriched combustion of a pushing steel continuous heating furnace in a domestic *** study utilizes numerical simulation method,establishes themathematicalmodels of flow,combustion andNOX generation combustion process in the furnace and analyzes the heat transfer process and NOX generation in the furnace under different air oxygen content and different wind *** research results show that with the increase of oxygen content in the air,the combustion temperature in the furnace rises significantly,and the emission concentration of NOX ***,the NOX emission concentration is related to the proportion of primary and secondary air.

关键词： Oxygen-enriched combustion heating furnace numerical simulation

Strong motions and engineering structure performances in recent major earthquakes

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Earthquake Science 2010年第1期23卷 1-3页

作者： xiaojun li Institute of Engineering Mechanics China Earthquake Administration Harbin 150080 China

In recent years, a series of major earthquakes occurred, which resulted in considerable engineering damage and collapse, triggered heavy geological hazards, and caused extremely high casualties and huge property and economic loss. The earthquakes include the 1994 Northridge earthquake （M6.8）, the 1995 Kobe earthquake （M6.8）, the 1999 Izmit earthquake （M7.6）,

关键词： Strong motions and engineering structure performances in recent major earthquakes

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岭南传统建筑元素在灯具设计中的应用研究

肇庆学院学报 2025年第1期46卷 48-53页

作者：陈茹李小军黄健恒肇庆学院美术学院、设计学院广东肇庆526061

将岭南传统建筑元素与现代灯具设计相结合,实现文化传承与创新,提升灯具艺术价值,丰富灯具文化内涵。结合岭南传统建筑造型、纹样及工艺特点,设计出集美观、实用、环保于一体的灯具产品,以促进传统工艺的复兴,推动当地相关产业经济发展... 详细信息

将岭南传统建筑元素与现代灯具设计相结合,实现文化传承与创新,提升灯具艺术价值,丰富灯具文化内涵。结合岭南传统建筑造型、纹样及工艺特点,设计出集美观、实用、环保于一体的灯具产品,以促进传统工艺的复兴,推动当地相关产业经济发展,丰富市场产品多样性。通过文献调研、现场考察、原型设计、功能测试、美学评价和多学科交叉等多种方法,探索岭南传统建筑元素在灯具设计应用中的可能性。结合现代设计方法在新材料运用、加工工艺、数字化与智能化技术上实现灯具创新设计,展现岭南传统文化的独特魅力。融入岭南传统建筑元素的灯具设计兼具装饰性和功能性,更容易被消费者接纳。将岭南传统建筑元素融入灯具设计,有助于提升灯具的文化价值和市场竞争力,促进传统文化产业的转型升级。

关键词：岭南传统建筑元素灯具设计文化产品创新

Deformation monitoring and remote analysis of ultra-deep underground space excavation

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Underground Space 2023年第1期8卷 30-44页

作者： Bangke Ren Yi Shen Tengteng Zhao xiaojun li Department of Geotechnical Engineering College of Civil EngineeringTongji UniversityShanghai 200092China State Key Laboratory of Disaster Reduction in Civil Engineering Tongji UniversityShanghai 200092China Shanghai SMI Water Group Co. Ltd.888 Guilin RoadChina

The development and utilization of urban underground space is producing many deep foundation ***-site monitoring is a key issue to ensure the safety of the foundation excavation,especially the monitoring of the lateral displacement of the *** ultra-deep circular foundation excavation project(58.65 m deep,the deepest foundation pit in Shanghai)in the test section of the Suzhou River deep tunnel is one of the most challenging engineering around the *** distributed optical fiber monitoring technology of Brillouin optical frequency domain analysis(BOFDA)was employed to monitor the lateral displacement of the deep *** monitoring process lasted for 14 months,and a total of 19 times of monitoring was carried out following the progress of the excavation of the foun-dation *** paper introduces the process,methods and precautions of optical fiber monitoring from early installation,equipment debugging to data acquisition,data processing and data *** comparing the fiber monitoring data with the manual monitoring data,the deformation of the deep foundation excavation is *** analysis results not only obtain the deformation law of ultra-deep foundation excavation,but also prove the advantages of optical fiber monitoring in deep foundation ***,with the support of the Smart Infrastructure Service System(iS3),the research combines optical fiber monitoring with an information *** the framework of the iS3 platform,an integrated data processing and analysis module for fiber monitoring is developed,and the feasibility of remote real-time collection and analysis of monitoring data is *** the support of the information platform,the monitoring data can be transmitted back to the computer terminal to realize remote monitoring.

关键词： Ultra-deep foundation excavation Remote analysis Fiber monitoring IS3