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Optimizing Strength and Ductility of Titanium Alloys by Oxygen: Review and Prospect

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Chinese Journal of Structural Chemistry 2020年第4期39卷 615-622页

作者： CAI Ze-Yun LI Kun xie guo-Qiang School of Materials Science and Engineering Harbin Institute of TechnologyShenzhen 518055China

The traditional strengthening elements of titanium alloys include Al,Mo,V,etc.,however,the high cost and toxicity of these elements put a limit on their further applications for *** light elements such as oxygen are hopeful replacement due to high *** is recognized that the oxygen enhances the strength but pays the price of brittleness,thus the amount of oxygen is ***,recent study results indicated that excess oxygen can keep high ductility together with high strength of *** paper reviews the influence and the mechanism of oxygen on the strength and ductility of titanium alloys,and provides a new perspective for the strengthening method of titanium alloys.

关键词： oxygen strength ductility titanium alloy

A Novel PDF Shape Control Approach for Nonlinear Stochastic Systems

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IEEE/CAA Journal of Automatica Sinica 2022年第8期9卷 1490-1498页

作者： Lingzhi Wang guo xie Fucai Qian Jun Liu Kun Zhang Electrical Engineering Department School of AutomationXi’an University of Posts and TelecommunicationsXi’an 710121China School of Automation and Information Engineering Xi’an University of TechnologyXi’an 710048China

In this work,a novel shape control approach of the probability density function(PDF)for nonlinear stochastic systems is ***,we provide the formula for the PDF shape controller without devising the control law of the ***,based on the exact analytical solution of the Fokker-PlanckKolmogorov(FPK)equation,the product function of the polynomial and the exponential polynomial is regarded as the stationary PDF of the state *** validate the performance of the proposed control approach,we compared it with the exponential polynomial method and the multi-Gaussian closure method by implementing comparative simulation *** results show that the novel PDF shape control approach is effective and *** an equal number of parameters,our method can achieve a similar or better control effect as the exponential polynomial *** comparison with the multiGaussian closure method,our method has clear advantages in PDF shape control *** all cases,the integral of squared error and the errors of first four moments of our proposed method were very small,indicating superior performance and promising good overall control effects of our *** approach presented in this study provides an alternative for PDF shape control in nonlinear stochastic systems.

关键词： Fokker-Planck-Kolmogorov(FPK)equation nonlinear control nonlinear stochastic systems probability density function(PDF)

Triggering star formation by both radiative and mechanical AGN feedback

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Research in Astronomy and Astrophysics 2013年第8期13卷 899-911页

作者： Chao Liu Zhao-Ming Gan Fu-guo xie Key Laboratory for Research in Galaxies and Cosmology Shanghai Astronomical Observatory Chinese Academy of Sciences University of Chinese Academy of Sciences

We perform two dimensional hydrodynamic numerical simulations to study the positive active galactic nucleus （AGN） feedback which triggers, rather than suppresses, star formation. Recently, it was shown by Nayakshin et al. and Ishibashi et al. that star formation occurs when the cold interstellar medium （ISM） is squeezed by the impact of mass outflow or radiation pressure, respectively. Mass outflow is ubiquitous in this astrophysical context, and radiation pressure is also important if the AGN is luminous. For the first time in this subject, we incorporate both mass outflow feedback and radiative feedback into our model. Consequently, the ISM is shocked into shells by the AGN feedback, and these shells soon fragment into clumps and filaments because of Rayleigh-Taylor and thermal instabilities. We have two major findings：（1） the star formation rate can indeed be very large in the clumps and filaments. However, the resultant star formation rate density is too large compared with previous works, which is mainly because we ignore the fact that most of the stars that are formed would be disrupted when they move away from the galactic center. （2） Although radiation pressure feedback has a limited effect, when mass outflow feedback is also included, they reinforce each other. Specifically, in the gas-poor case, mass outflow is always the dominant contributor to feedback.

关键词： methods: numerical - accretion - shock waves - galaxies: active - galaxies: starburst

Effect of MgO Critical Particle Size on Properties of MgO-C Continuous Temperature-Measuring Sensor for Liquid Steel

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Journal of Iron and Steel Research International 2011年第12期18卷 12-21页

作者： ZHAO Shu-mao MEI guo-hui xie Zhi College of Information Science and Engineering Northestern University Shenyang 110004 Liaoning China

MgO-C continuous temperature-measuring sensors for liquid steel were made of fused magnesia with different critical particle sizes from 0.5 to 2.0 mm,thus the effects what magnesia＇s particle size affect sensors＇ properties and lifetime were *** result shows that the MgO-C continuous temperature-measuring sensor has good aggression resistance to basic tundish powders and meets the requirement for response time of temperature measuring practice in *** sensor＇s service life,which is affected by multi-properties of material and operating environment,reached its maximum when the critical particle size of magnesia was 1.0 *** average lifetime of sensors was 43 or 40 h when served for casting SPHC or Q195 steel.

关键词： MgO carbon microstructure sensors lifetime particle size

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复发性髌骨脱位危险因素的研究进展

临床医学研究与实践 2024年第9期9卷 181-185页

作者：谢国安肖勋刚何骁南华大学衡阳医学院湖南衡阳421001 南华大学附属郴州医院湖南郴州423000

髌骨脱位是儿童和青少年中最常见的膝关节损伤之一,在首次发生髌骨脱位后,反复脱位的风险仍然相当高,并容易导致膝关节活动度减少、加速膝关节骨关节炎的恶化。但是目前关于哪些患者首次脱位容易出现髌骨不稳甚至反复脱位尚不明确,归纳... 详细信息

髌骨脱位是儿童和青少年中最常见的膝关节损伤之一,在首次发生髌骨脱位后,反复脱位的风险仍然相当高,并容易导致膝关节活动度减少、加速膝关节骨关节炎的恶化。但是目前关于哪些患者首次脱位容易出现髌骨不稳甚至反复脱位尚不明确,归纳复发性脱位患者的危险因素,利用预测模型进行分类管理对临床干预是非常有意义的。本综述将分析复发性髌骨脱位患者的解剖因素和人口统计学特征,探究危险因素的综合效应,讨论用于评估复发性髌骨脱位的预测模型的作用,旨在识别复发性髌骨脱位的高危人群,为临床个体化评估和治疗提供依据。

关键词：髌骨脱位髌股关节不稳风险因素预测模型膝关节损伤

液相串联质谱评价多奈哌齐双层微球的体内释药行为

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广州化工 2024年第15期52卷 91-96页

作者：颜携国曾哲刘代春深圳善康医药科技股份有限公司广东深圳518118

采用液相串联质谱方法开发并验证了一种用于测定大鼠血浆中多奈哌齐的方法,并将方法应用于多奈哌齐双层微球在大鼠体内的药代动力学评价。使用氯苯那敏作为内标,用乙腈沉淀蛋白质后,在ZORBAX Eclipse Plus C_(18)上分离目标分析物,按体... 详细信息

采用液相串联质谱方法开发并验证了一种用于测定大鼠血浆中多奈哌齐的方法,并将方法应用于多奈哌齐双层微球在大鼠体内的药代动力学评价。使用氯苯那敏作为内标,用乙腈沉淀蛋白质后,在ZORBAX Eclipse Plus C_(18)上分离目标分析物,按体积比40∶60,流动相采用0.1%甲酸溶液与乙腈进行等度洗脱。质谱分析采用电喷离子源-正离子模式联合多反应监测分析,分别监测多奈哌齐和氯苯那敏的离子对m/z 380.0→243.0和m/z 275.0→230.0的转变。多奈哌齐的浓度范围为3.75~120.00 ng/mL,r^(2)大于0.999。准确度误差和相对标准偏差均低于15%。基质效应变异系数分别为3.15%、2.96%和1.36%。不同条件下多奈哌齐稳定变异系数在0.27%~1.61%之间。多奈哌齐双层微球在大鼠体内的释药行为,吸收迅速,消除过程缓慢,表现出良好的药物缓释特性。开发了新的液相串联质谱方法,这种方法具有高特异性和灵敏度,并且快速可靠。为多奈哌齐双层微球的体内释药行为提供有效的评价工具,为多奈哌齐双层微球的开发和临床应用提供了重要的科学依据。

关键词： LC-MS/MS 多奈哌齐氯苯那敏药代动力学双层微球

Numerical Simulation of Coal Floor Fault Activation Influenced by Mining

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Journal of China University of Mining and Technology 2006年第4期16卷 385-388页

作者： WANG Lian-guo MIAO xie-xing School of Sciences China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China

By means of the numerical simulation software ANSYS, the activation regularity of coal floor faults caused by mining is simulated. The results indicate that the variation in horizontal, vertical and shear stresses, as well as the horizontal and vertical displacements in the upper and the lower fault blocks at the workface are almost identical. Influ- enced by mining of the floor rock, there are stress releasing and stress rising areas at the upper part and at the footwall of the fault. The distribution of stress is influenced by the fault so that the stress isolines are staggered by the fault face and the stress is focused on the rock seam around the two ends of the fault. But the influence in fault activation on the upper or the lower fault blocks of the workface is markedly different. When the workface is on the footwall of the fault, there is a horizontal tension stress area on the upper part of the fault; when the workface is on the upper part of the fault, it has a horizontal compressive stress area on the lower fault block. When the workface is at the lower fault block, the maximum vertical displacement is 5 times larger then when the workface is on the upper fault block, which greatly in- creases the chance of a fatal inrush of water from the coal floor.

关键词： mining fault activation: simulation

Entanglement Dynamics of Multipartite Systems Under Decoherence from a Spin Environment

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Communications in Theoretical Physics 2006年第1X期46卷 73-76页

作者： xie guo-Qiu WANG An-Min MA Xiao-San Department of Modern Physics University of Science and Technology of China Hefei 230026 China Department of Electronic Information and Engineering Huangshan University Huangshan 245000 China

The entanglement evolution of multipartite quantum states under a spin environment is analyzed. Due to interaction, the extent to which the entanglement vanishes depends not only on the size of system and the structure of quantum states, but also on the exchange couplings with environment. The decoherence-free subspaces have been identified by using the linear entropy.

关键词： entanglement dynamics decoherence a spin environment

Multi-Objective Optimization and Analysis Model of Sintering Process Based on BP Neural Network

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Journal of Iron and Steel Research International 2007年第2期14卷 1-5页

作者： ZHANG Jun-hong xie An-guo SHEN Feng-man Anshan University of Science and Technology Anshan 114044 Liaoning Chinas Institute of Ferrous Metallurgy Northeastern University Shenyang 110004 Liaoning China

A multi-objective optimization and analysis model of the sintering process based on BP neural network is presented. Genetic algorithms are combined to simplify the BP neural network, which can reduce the learning time and increase the forecasting accuracy of the network model. This model has been experimented in the sintering process, and the production cost, the energy consumption, the quality （revolving intensity）, and the output are considered at the same time. Moreover, the relation between some factors and the multi-objectives has been analyzed, and the results are consistent with the process. Different objectives are emphasized at different practical periods, and this can provide a theoretical basis for the manager.

关键词： BP neural network multi-objective optimization sinter