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Polypropylene microplastics alter the cadmium adsorption capacity on different soil solid fractions

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Frontiers of Environmental Science & Engineering 2022年第1期16卷 65-76页

作者： Xianying Ma Xinhui Zhou Mengjie Zhao Wenzhuo Deng Yanxiao Cao Junfeng Wu Jingcheng Zhou School of Information and Safety Engineering Zhongnan University of Economics and LawWuhan 430073China research Center for Environment and Health Zhongnan University of Economics and LawWuhan 430073China Wuhan regen Environmental remediation Co. LtdWuhan 430073China*

Microplastics(MPs)are widely present in a variety of environmental media and have attracted more and more attention ***,the effect of MPs on the interaction between heavy metals and soil,especially in soil solid fraction level,is not well *** this study,batch experiments were performed to investigate the adsorption characteristics of Cd in bulk soil and three soil solid fractions(*** organo matter(POM),organic-mineral compounds(OMC),and mineral)with or without polypropylene(PP)*** results showed that the addition of PP-MPs reduced the Cd adsorption capacity of the bulk soil in aqueous solution,and the effects varied with PP-MPs dose and aging ***,the responses of the three fractions to PP-MPs were *** presence of PP-MPs,the POM and OMC fractions showed negative adsorption effects,while the mineral fraction showed positive *** the bulk soil,POM and OMC fractions,the adsorption isotherm fitted to the Langmuir model better than the Freundlich model,whereas,the Freundlich isotherm model was more fitted for the mineral *** with the comprehensive analysis of the partitioning coefficients,XrD and FTIr results,it was found that OMC fraction extremely likely play a leading role in the bulk soil adsorption of Cd in this ***,the effect of MPs on adsorption capacity of the bulk soil for Cd may be determined by the proportion of POM,OMC,and mineral fractions in the soil,but further confirmation is needed.

关键词： Polypropylene microplastics Cadmium Adsorption POM OMC Mineral

High-Velocity Projectile Impact Behaviour of Friction Stir Welded AA7075 Thick Plates

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Defence Technology（防务技术） 2023年第11期29卷 153-163页

作者： r.Praveen S.r.Koteswara rao G.Selvakumar r.Damodaram Department of robotics and Automation Karpaga Vinayaga College of Engineering and TechnologyChengalpattu603308TamilNaduIndia Department of Mechanical Engineering Sri Sivasubramaniya Nadar College of EngineeringChennai603110TamilNaduIndia

In this study, high velocity impact behaviour of friction stir welded AA7075-T651 25 mm thick plates were investigated using a 7.62 mm × 51 mm lead core and 7.62 mm × 39 mm steel core projectiles. Prior to ballistic trails, mechanical and metallurgical properties of friction stir welded AA 7075-T651 25 mm thick plates were studied. Microstructural and hardness studies revealed that friction stir welds constituted three distinct regions namely Weld Nugget(wn), Thermo-Mechanically Affected Zone(TMAZ) and Heat Affected Zone(HAZ). Base Material(BM) and all three weld regions were ballistically tested as per military standard NIJ.0108.01 using lead and steel core bullets at maximum permissible velocities of 830 ± 20 and 700 ± 30 m/s, respectively. It has been found that base material(AA7075-T651)and all three weld regions of 25 mm thick plates were able to resist perforation by both types of projectiles used. However depth of penetration has been found to increase from BM to wn, HAZ and TMAZ for both types of projectiles. In all cases steel core projectiles caused higher depth of penetration compared to those caused by lead core projectiles. TMAZs of the friction stir welds were found to be the weakest zone. The fracture that occurred in the base material was spall fragmentation indicating brittle failure, whereas all zones of friction stir welded AA7075-T651 targets with a front petalling, indicating ductile failure. The post-ballistic tested samples showed no significant change in the microstructure of the BM and wn. On the other hand, TMAZ and HAZ showed severe grain deformation in the direction of projectile penetration, and the formation of adiabatic shear bands(ASB). This work showed that 25 mm thick friction stir welded AA7075-T651 joints responded well to ballistic impact loads, making them a good choice for light combat vehicles.

关键词： Aluminum alloy Thick plate Friction stir welding Ballistic performance Depth of penetration

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约翰·沃尔夫冈·歌德

外国文学研究 1994年第2期16卷 1-12,27页

作者： E·M·wn·绿原

歌德(Goethe,Johann Wolfgang von.1749.8.28～1832.3.22)德国作家,公认的世界文学巨人之一,也许是最后一个试图多方面掌握文艺复兴时期的伟大品格的欧洲人:批评家,刊物编辑,画家,剧院经理,政治家,教育家,自然科学家。

关键词：《浮士德》沃尔夫莎士比亚意大利古典主义韦茨拉尔浪漫派席勒抒情诗作品

The Bimechanics of Wheelchair Maneuvers

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The Bimechanics of Wheelchair Maneuvers

中国康复医学会第四届会员代表大会暨第三届中国康复医学学...

作者： Arhtur FT Mak wn LAM Jockey Club rehabilitation Engineering Center The Hong Kong Polytechnic University Jockey Club rehabilitation Engineering Center The Hong Kong Polytechnic University

＜正＞Wheelchair maneuvers are daily activities for many people with disabilities, just likewalking for those who can. lmproper wheelchair maneuvers, either due to inappropriate wheelchair pre-scriptions or inappropriate propulsion habits, could lead to secondary injuries to joints in the upper *** presentation would review the current literatures on the kinematics and kinetics of wheelchairpropulsion and present recent work in our Center on the biomechanics of wheelchair *** is a frequent indoor routine, but very few studies on wheelchair turning have not been re-ported so far. We have studied wheelchair turning with both non-disabled subjects and spinal cord in-jured subuects. Special instrumented smart wheels were used to measure the reaction forces acting on thehands by the push-rims. VICON motion analysis system was used to monitor the movements of both up-per extremities. Subjects were instructed to go through a simple protocol of wheelchair maneuvers that in-volved forward propulsion, left and right turing. Joint forces in the turning side and the pivtal side will becompared. Comparisons will also be made between joint forces in the dominant arms and the non-domi-nant *** will be made on the implications of these results on the consequences of inappropriatewheelchair maneuver habits and of inappropriate wheelchair prescriptions.

关键词：

来源： cnki会议评论

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深切悼念林耀基教授

人民音乐 2009年第7期 85-86页

作者：吴祖强中国音乐家协会中央音乐学院

3月16日，星期一清晨，早餐后不久便接到王次炤院长电话，不似平时听惯那样。沉静的语音立即引起了我的不安，感到可能出了什么事情。果然，他略带哽咽地和我说：“刚才从林耀基老师家出来，他今天凌晨去世了……”，

关键词：林耀基怀念星期一音乐工作者

Influence of texture pretreatment on cold rolling texture of ELC-BH sheet

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International Journal of Minerals,Metallurgy and Materials 1997年第3期11卷 27-29页

作者： GUAN Xiaojun ZHOU Jiajuan HU Xiaojun wn Qiulin (College of Material Science and Engineering, Shandong University of Technology, Jinan 250061, China) (Metallurgy Institute of Capital Steel and Iron Corporation Beijing 100085, China)

In order to further investigate how cold rolling texture is produced in an extra low-carbon and high strengthbake-hardening sheet steel (for short, hereafter, coiled ELC-BH sheet) with r value as high as 2.67, texture change intexture pretreatment and its effects on the cold rolling texture are researched by means of Orientation Distribution Funchon (ODf) method. Experimental results show that the cold rolling texture which Produces very strong {111 } annealing texture actually is caused by texture change in the texture pretreatment, and the strong {111 } texture obtainedrough this texture pretreatment is an essential condition of engendering the cold rolling texture, while the stability of{111 } texture components in cold rolling is a sufficient condition of emerging thes one.

关键词： extra low-carbon steel texture pretreatment process

LOCALIZATION AND APPrOXIMATION OF ATTrACTOrS FOr THE KUrAMOTO-SIVASHINSKY EQUATIONS

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Acta Mathematica Scientia 2000年第2期20卷 145-154页

作者：伍渝江郭本瑜 Department of Mathematics Lanzhou University Lanzhou 730000 China Department of Mathematics Shanghai University Jiading Campus Shanghai 201800 China

The aim of this paper is to provide explicitly a sequence of m-dimensional approximate inertial manifolds M(m,j,)j = 1,2,, for each positive integer m, for the Kuramoto-Sivashinsky equations. A very thin neighborhood into which the orbits enter with an exponential speed and in a finite time is associated with each manifold. The thickness of these neighborhoods decreases with increasing m for a fixed order j. Besides, the neighborhoods localize the global attractor and aid in the approximate computation of large-time solutions of the Kuramoto-Sivashinsky equations.

关键词： Kuramoto-Sivashinsky equations attractors approximate inertial manifolds

我国电影专项资金与法国CNC电影资助基金的比较及启示

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北京电影学院学报 2019年第12期 70-76页

作者：于丽李燕北京电影学院管理学院中原工学院新闻与传播学院

我国电影专项资金在设立之初,参考了法国等国家从放映端抽取一定比例资金用于资助电影业发展的经验,但在管理模式上与法国CNC资助基金有较大差异。CNC资助基金创立于20世纪40年代,70余年来以自动和选择两种资助方式扶持法国电影产业,其... 详细信息

我国电影专项资金在设立之初,参考了法国等国家从放映端抽取一定比例资金用于资助电影业发展的经验,但在管理模式上与法国CNC资助基金有较大差异。CNC资助基金创立于20世纪40年代,70余年来以自动和选择两种资助方式扶持法国电影产业,其资助范围已涵盖了电影产业各环节和电影业相关的许多方面,对法国电影产业的发展和促进法国电影文化的多样性发挥着重要作用。通过分析和借鉴法国CNC资助基金的运作模式,可为我国电影专项资金的完善提供一些有益的启示。

关键词：电影专项资金 CNC电影资助基金运作模式

Pioglitazone after ischemic stroke

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中华物理医学与康复杂志 2016年第9期38卷 716-716页

作者： Kernan wn Viscoli CM Furie KL

BACKGrOUND AND OBJECTIVE As insulin resistance is present in more than 50%of patients without diabetes who have had an ischemic stroke or TIA,addressing this issue seems central to the treatment of these *** one medication,pioglitazone,a peroxisome proliferator-activated receptor y agonist,has been found to reduce the risk of cardiovascular events in patients with type 2 diabetes,this

关键词：吡格列酮脑缺血 2型糖尿病中风胰岛素抵抗心肌梗死激动剂心血管