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Simulation of MC-CDMA in the Presence of Timing Errors

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The Journal of China Universities of Posts and Telecommunications 2002年第2期9卷 7-12页

作者： ZHANG Deng yin, zheng Bao yu (Nanjing University of Posts and Telecommunications, Nanjing 210003, P.R.China) Nanjing University of Posts and Telecommunications Nanjing 210003 P.R.China

In this paper, new multiple access schemes based on thecombination of Code Division Multiple Access (CDMA)andMulticarrier(MC)modulation(also known as OFDM)are reviewed. Adescription of a simulation platform developed to analyse theperformance of such systems in the presence of timing errors isincluded. It is shown that the MC-CDMA system is very sensitive to aclock frequency offset, and the system performance rapidly de- gradesfor an increasing number of carriers. It is also shown that thetiming jitter gives rise to a performance degra- dation that isessentially independent of the number of carriers.

关键词： MC modulation CDMA simulation

A tiered approach to hazard evaluation with the goal of endpoint identification for human health risk assessment

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A tiered approach to hazard evaluation with the goal of endp...

CNKSR2 interactome analysis indicates its association with the centrosome/microtubule system

中国毒理学会第六届全国毒理学大会

作者： yin zheng-yu Tessa L.SEREX DuPont Haskell Global Centers for Health and Environmental Sciences DuPont Crop Protection

＜正＞The goals of health hazard assessment for industrial chemicals typically involve gaining enough information to provide a hazard classification according to a classification system such as the Globally Harmonized System of Classification（GHS） as well as derivation of the most sensitive endpoint and concentration-effect level for health risk *** Classification under the GHS scheme involves animal testing of several endpoints that typically are not used for risk assessment,but may provide information for the design of higher tier testing that can be used to identify the most sensitive and appropriate endpoint for human health risk *** goal of this presentation is to review the cur- rent approach to hazard evaluation and provide examples of assessments where using a tiered testing scheme could lead to a more targeted approach that may involve the use of fewer animals and provide more accurate health hazard information for risk ***,this approach would use a combination of screening and standard OECD guidelines to allow the toxicologist to better determine and target endpoints for evaluation in longer-term studies.

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来源： cnki会议评论

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cnki会议

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Neural Regeneration Research 2025年第8期20卷 2420-2432页

作者： Lin yin Yalan Xu Jie Mu yu Leng Lei Ma yu zheng Ruizhi Li yin Wang Peifeng Li Hai Zhu Dong Wang Jing Li Institute for Translational Medicine The Affiliated Hospital of Qingdao UniversityMedical CollegeQingdao UniversityQingdaoShandong ProvinceChina School of Basic Medicine Qingdao UniversityQingdaoShandong ProvinceChina College of Life Sciences and School of PharmacyMedical CollegeQingdao UniversityQingdaoShandong ProvinceChina Department of Urology Qingdao Municipal Hospital Affiliated to Qingdao UniversityQingdaoShandong ProvinceChina

The protein connector enhancer of kinase suppressor of Ras 2(CNKSR2),present in both the postsynaptic density and cytoplasm of neurons,is a scaffolding protein with several protein-binding *** of the CNKSR2 gene have been implicated in neurodevelopmental disorders,particularly intellectual disability,although the precise mechanism involved has not yet been fully *** has demonstrated that CNKSR2 plays a role in facilitating the localization of postsynaptic density protein complexes to the membrane,thereby influencing synaptic signaling and the morphogenesis of dendritic ***,the function of CNKSR2 in the cytoplasm remains to be *** this study,we used immunoprecipitation and high-resolution liquid chromatography-mass spectrometry to identify the interactors of *** a combination of bioinformatic analysis and cytological experiments,we found that the CNKSR2 interactors were significantly enriched in the proteome of the *** also showed that CNKSR2 interacted with the microtubule protein DYNC1H1 and with the centrosome marker *** colocalization analysis confirmed the centrosomal localization of *** we downregulated CNKSR2 expression in mouse neuroblastoma cells(Neuro 2A),we observed significant changes in the expression of numerous centrosomal *** manipulation also affected centrosome-related functions,including cell size and shape,cell proliferation,and ***,we found that CNKSR2 interactors were highly enriched in de novo variants associated with intellectual disability and autism spectrum *** findings establish a connection between CNKSR2 and the centrosome,and offer new insights into the underlying mechanisms of neurodevelopmental disorders.

关键词： autism spectrum disorder centrosome CNKSR2 intellectual disability interactome mass spectrometry microtubule neurodevelopmental disease protein complexes protein-protein interactions

基于风险评估的国家化学品管理体系——机遇与挑战（英文）

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中国药理学与毒理学杂志 2014年第2期28卷 145-153页

作者： Ralph G STAHL Jr 殷征宇 Corporate Remediation Group DuPont Company Wilmington 杜邦哈斯凯尔全球健康与环境研究中心上海201203

尽管主要发达国家的化学品管理体系已经运行了30多年,但诸多不完善使这些体系仍然不断面临挑战。这些因素包括数据的质量和数量,对监管工作人员与资源的需求增长,危害和暴露评估方法的演变,以及化学品管理究竟是应该基于风险(危害和暴露... 详细信息

尽管主要发达国家的化学品管理体系已经运行了30多年,但诸多不完善使这些体系仍然不断面临挑战。这些因素包括数据的质量和数量,对监管工作人员与资源的需求增长,危害和暴露评估方法的演变,以及化学品管理究竟是应该基于风险(危害和暴露)还是基于危害的争鸣。新兴国家和发展中国家在建立各自的化学品管理体系的过程中,迫切希望借鉴发达国家的经验,减少或避免已往失误和现存的缺陷。即使如此,正在新建或完善的国家管理体系,也还会面临着相同的命题或者新的挑战。本文着重以个人的亲身经验,评述了美国和欧洲已有的管理体系和正在完善的中国的化学品管理体系,这些体系的一些关键元素,以及危害、暴露与风险评估方法演变所带来的挑战,并就如何进一步改进和完善化学品管理体系提出了个人的见解和建议。

关键词：化学品管理风险评估风险管理

Effect of cholesterol metabolism on hepatolithiasis

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World Journal of Gastroenterology 2025年第1期31卷 157-162页

作者： Lin zheng Zi-yu Ye Jun-Ji Ma Department of Gastroenterology The Second Hospital of Hebei Medical UniversityHebei Key Laboratory of GastroenterologyHebei Institute of GastroenterologyHebei Clinical Research Center for Digestive DiseasesNo.215 Heping West RoadShijiazhuang 050000Hebei ProvinceChina

Surgical intervention is currently the primary treatment for hepatolithiasis;how-ever,some patients still experience residual stones and high recurrence rates after *** metabolism seems to play an important role in hepatoli-thiasis pathogenesis.A high cholesterol diet is one of the significant reasons for the increasing incidence of ***,regular diet and appropriate medical intervention are crucial measures to prevent hepatolithiasis and reduce recurrence rate after *** dietary cholesterol and drugs that increase cholesterol stone solubility are key therapeutic approaches in treating *** article discusses the cholesterol metabolic pathways related to the pathogenesis of hepatolithiasis,as well as food intake and targeted therapeutic drugs.

关键词： Hepatolithiasis Cholesterol metabolism High-fat diet 3-hydroxy-3-methylglutaryl-coenzyme A reductase Interlobular bile duct

Dynamic Regulation of Hydrogen Bonding Networks and Solvation Structures for Synergistic Solar‑Thermal Desalination of Seawater and Catalytic Degradation of Organic Pollutants

维普期刊数据库评论

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维普期刊数据库

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Nano-Micro Letters 2025年第2期17卷 548-565页

作者： Ming‑yuan yu Jing Wu Guang yin Fan‑Zhen Jiao Zhong‑Zhen yu Jin Qu Beijing Key Laboratory of Advanced Functional Polymer Composites Beijing University of Chemical TechnologyBeijing 100029People’s Republic of China State Key Laboratory of Organic‑Inorganic Composites College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029People’s Republic of China

Although solar steam generation strategy is efficient in desalinating seawater,it is still challenging to achieve continuous solar-thermal desalination of seawater and catalytic degradation of organic ***,dynamic regulations of hydrogen bonding networks and solvation structures are realized by designing an asymmetric bilayer membrane consisting of a bacterial cellulose/carbon nanotube/Co_(2)(OH)_(2)CO_(3)nanorod top layer and a bacterial cellulose/Co_(2)(OH)_(2)CO_(3)nanorod(BCH)bottom ***,the hydrogen bonding networks inside the membrane can be tuned by the rich surface–OH groups of the bacterial cellulose and Co_(2)(OH)_(2)CO_(3)as well as the ions and radicals in situ generated during the catalysis ***,both SO_(4)^(2−)and HSO_(5)−can regulate the solvation structure of Na^(+)and be adsorbed more preferentially on the evaporation surface than Cl^(−),thus hindering the de-solvation of the solvated Na^(+)and subsequent nucleation/growth of ***,the heat generated by the solar-thermal energy conversion can accelerate the reaction kinetics and enhance the catalytic degradation *** work provides a flow-bed water purification system with an asymmetric solar-thermal and catalytic membrane for synergistic solar thermal desalination of seawater/brine and catalytic degradation of organic pollutants.

关键词： Solar steam generation Seawater desalination Catalytic degradation Bacterial cellulose Cobalt hydroxycarbonate nanorods

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贵阳地区高校学生体质健康达标状况分析

贵州师范学院学报 2010年第9期26卷 39-42页

作者：郑印渝贵州师范学院体育学院贵州贵阳550018

依据《大学生体质健康标准》随机对贵阳市5所高校的5088名大学生进行体质测试,并对其展开了针对性的分析,分析结果显示:贵阳地区高校的部分学生的体质存在体重偏轻、营养不良、腿部爆发力水平不高、肺活量体重指数整体水平不高等问题,同... 详细信息

依据《大学生体质健康标准》随机对贵阳市5所高校的5088名大学生进行体质测试,并对其展开了针对性的分析,分析结果显示:贵阳地区高校的部分学生的体质存在体重偏轻、营养不良、腿部爆发力水平不高、肺活量体重指数整体水平不高等问题,同时,测试发现台阶试验的整体水平比较高,女生拥有良好的柔韧性,男生手臂的相对力量基本达标,并根据贵阳地区高校学生的体质现状提出自己的建议。

关键词：贵阳市高校体质健康达标

我国女子高水平太极拳套路运动员体能结构特征的研究

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贵州师范学院学报 2011年第3期27卷 37-40页

作者：郑印渝贵州师范学院体育学院贵州贵阳550018

以我国25名女子一级太极拳套路运动员为研究对象,从整体论、系统论的角度出发,采用文献资料、专家问卷调查、测试法、数理统计等研究方法,明确了太极拳套路运动员体能概念,采用逐步回归分析法筛选出了能有效反映我国高水平太极拳运动员... 详细信息

以我国25名女子一级太极拳套路运动员为研究对象,从整体论、系统论的角度出发,采用文献资料、专家问卷调查、测试法、数理统计等研究方法,明确了太极拳套路运动员体能概念,采用逐步回归分析法筛选出了能有效反映我国高水平太极拳运动员体能水平的9项敏感指标,从对筛选指标的分析结果我们发现:我国女子高水平太极拳套路运动员的体能具有身材匀称、下肢相对较长、肌肉含量中等、心肺指数相对较高、有氧耐力水平雄厚、腿部爆发力水平高和在动态中维持身体平衡能力强的特征。

关键词：女子太极拳体能结构研究

Influence of introducing Zr,Ti,Nb and Ce elements on externally solidified crystals and mechanical properties of high-pressure die-casting Al–Si alloy

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 147-153页

作者： Junjie Li Wenbo yu Zhenyu Sun Weichen zheng Liangwei Zhang Yanling Xue Wenning Liu Shoumei Xiong Center of Materials Science and Engineering School of Mechanical and Electronic Control EngineeringBeijing Jiaotong UniversityBeijing 100044China Traffic&Transportation Engineering Central South UniversityChangsha 410075China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China School of Materials Science and Engineering Tsinghua UniversityBeijing 100084China

High pressure die casting(HPDC)AlSi10Mn Mg alloy castings are widely used in the automobile *** can optimize the mechanical properties of castings through heat treatment,while the release of thermal stress arouses the deformation of large integrated ***,the development of non-heat treatment Al alloys is becoming the hot *** addition,HPDC contains externally solidified crystals(ESCs),which are detrimental to the mechanical properties of *** achieve high strength and toughness of non-heat treatment die-casting Al-Si alloy,we used AlSi9Mn alloy as matrix with the introduction of Zr,Ti,Nb,and *** influences on ESCs and mechanical properties were systematically investigated through three-dimensional reconstruction and thermodynamic *** results reveal that the addition of Ti increased ESCs'size and porosity,while the introduction of Nb refined ESCs and decreased ***,large-sized Al_3(Zr,Ti)phases formed and degraded the mechanical *** introduction of Ce resulted in the poisoning effect and reduced mechanical properties.

关键词： aluminium alloy high-pressure die-casting externally solidified crystals non-heat treatment