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阀控充液型液力偶合器专用试验系统的研制

煤矿机电 2016年第3期37卷 62-64,69页

作者：张胜达张庚云李建国刘伟贾运红王腾中国煤炭科工集团太原研究院有限公司山西太原030006

阀控充液型液力偶合器出厂试验工艺复杂,而且难以实现批量生产条件下快速出厂检验。针对这些问题,研制了一套阀控充液型液力偶合器专用试验系统。重点分析了试验系统的性能要求,介绍了试验系统的组成与功能。实际使用效果表明,该系统具... 详细信息

阀控充液型液力偶合器出厂试验工艺复杂,而且难以实现批量生产条件下快速出厂检验。针对这些问题,研制了一套阀控充液型液力偶合器专用试验系统。重点分析了试验系统的性能要求,介绍了试验系统的组成与功能。实际使用效果表明,该系统具有组装速度快、可扩展性强、操作方便和试验成本低等优点。

关键词：阀控充液型液力偶合器试验系统变频驱动组态软件

气候变化以两种不同方式驱动了丝绸之路路线的变迁

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Science Bulletin 2024年第8期69卷 1153-1160页

作者：王海鹏陈建徽仇梦晗史志林张盛达董广辉马帅艾涛任冠陈发虎 State Key Laboratory of Cryospheric Science Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China MOE Key Laboratory of Western China’s Environmental Systems Lanzhou UniversityLanzhou 730000China Institute of Dunhuang Studies School of History&CultureLanzhou UniversityLanzhou 730000China School of Geography and Remote Sensing Guangzhou UniversityGuangzhou 510000China Xinjiang Institute of Cultural Relics and Archaeology Ürümqi 830011China Archaeology of Northern Ethnicity Institute Renmin University of ChinaBeijing 100872China ALPHA State Key Laboratory of Tibetan Plateau Earth SystemEnvironment and ResourcesInstitute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China

Although climate change has convincingly been linked to the evolution of human civilization on different temporal scales,its role in influencing the spatial patterns of ancient civilizations has rarely been investigated,The northward shift of the ancient Silk Road(SR)route from the Tarim Basin(TB)to the Junggar Basin during~420-850 CE provides the opportunity to investigate the relationship between climate change and the spatial evolution of human ***,we use a new high-resolution chironomidbased temperature reconstruction from arid China,combined with hydroclimatic and historical datasets,to assess the possible effects of climate fluctuations on the shift of the ancient SR route,We found that a cooling/drying climate in the TB triggered the SR route shift during~420-600 CE,However,a warming/wetting climate during~600-850 CE did not inhibit this shift,but instead promoted it,because of the favorable climate-induced geopolitical conflicts between the Tubo Kingdom and the Tang Dynasty in the *** findings reveal two distinct ways in which climate change drove the spatial evolution of human civilization,and they demonstrate the flexibility of societal responses to climate change.

关键词： Chironomids Temperature reconstruction Water resources Geopolitical conflicts

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分布式光伏集控中心的设计与实现

浙江电力 2017年第6期36卷 48-51页

作者：王胜昌俞伟陈捷沈文良张胜达国网浙江杭州市富阳区供电公司杭州311400

分布式电源作为新能源发电重要的利用形式,对缓解能源危机和减少碳排放起着至关重要的作用,但它也改变了配电网网络结构,改变了电压调节、潮流控制以及网络特性,致使因电能质量问题对用户用电设备带来了安全隐患。为此,开展分布式光伏... 详细信息

分布式电源作为新能源发电重要的利用形式,对缓解能源危机和减少碳排放起着至关重要的作用,但它也改变了配电网网络结构,改变了电压调节、潮流控制以及网络特性,致使因电能质量问题对用户用电设备带来了安全隐患。为此,开展分布式光伏接入配电网的可靠供电技术、安全检修技术研究,以新能源发电功率预测和负荷预测结果为基础,开展配电网调度运行经济性研究和分布式发电联络线功率管理,提出利用分布式可再生能源提高配电网电能质量、降低运行损耗及提高供电可靠性的控制策略,构建了分布式光伏集控中心,实现分布式电源的可靠接入和协调优化运行。

关键词：分布式电源配电网光伏集控中心

Thermo-mechanical properties of RTM-made carbon fibre/polyimide composite attaching collar under transient heating

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Chinese Journal of Aeronautics 2023年第3期36卷 393-405页

作者： shengda JIANG Chuyang LUO Peng zhang Jianwen BAO Peipei CAI Xufeng XIA Shanghai High Performance Fibers and Composites Center(Province-Ministry Joint) Center for Civil Aviation CompositesDonghua UniversityShanghai 201620China AVIC Composite Technology Center Science and Technology on Advanced Composites LaboratoryBeijing 101300China Luoyang Optoelectro Technology Development Center Luoyang 471009China

This study focuses on the thermo-mechanical properties of Carbon Fibre/Polyimide Composite(CFPC)attaching collars under transient *** CFPC attaching collars were fabricated by a high-temperature resin transfer moulding process,and their thermo-mechanical properties under the conditions of simultaneous transient heating and bending load were *** results show that the attaching collar tends to fail at 118% of the limit *** failure mode includes the fracture of the connecting screws,local extrusion damage of the hole edges,and slight ablation damage at the outer *** there is no observable residual deformation in the composite attaching ***,considering that the material properties vary with temperature,a progressive damage model based on the sequential thermo-mechanical coupling method was established to study the failure mechanism of the attaching ***,the damage factor of the CFPC was calculated to assess the safety status of the attaching *** results show that the primary damage modes of the composite attaching collar are intralaminar failure,which mainly occurs at the heat insulation layer and the hole edges,and these slightly affect the structural bearing capacity.A good correlation between the experiment and FEA is *** test methods and analysis models proposed contribute to the safety assessment of composite structures under transient heating.

关键词： Polyimide composites Progressive damage model Resin transfer moulding Thermo-mechanical properties Transient heating

人大肠癌和癌旁组织消减cDNA文库的构建和鉴定

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胃肠病学 2004年第3期9卷 154-157页

作者：叶方鹏肖冰南清振吴保平崔生达张万岱第一军医大学南方医院全军消化病研究所 510515

背景:抑制消减杂交(SSH)是一种较成熟的分离差异表达基因的方法,但用该方法构建大肠癌特异性基因消减cDNA文库和筛选相关基因的研究较少。目的:构建人大肠癌和癌旁组织的消减cDNA文库。方法:应用SSH技术分离大肠癌和癌旁正常组织差异表... 详细信息

背景:抑制消减杂交(SSH)是一种较成熟的分离差异表达基因的方法,但用该方法构建大肠癌特异性基因消减cDNA文库和筛选相关基因的研究较少。目的:构建人大肠癌和癌旁组织的消减cDNA文库。方法:应用SSH技术分离大肠癌和癌旁正常组织差异表达基因的cDNA片段,将其与pGEM鄄TEasy载体连接,构建消减cDNA文库。将连接产物转化大肠杆菌DH5α进行文库扩增。随机挑取200个白色克隆,以聚合酶链反应(PCR)进行鉴定。结果:进行PCR扩增的200个克隆中,176个克隆有插入片段,片段分布于200～700bp。结论:成功构建了人大肠癌组织和癌旁组织差异表达基因的消减cDNA文库,为高通量筛选、克隆大肠癌特异性基因奠定了基础。

关键词：大肠癌癌旁组织 cDNA文库构建鉴定

西藏邱桑温泉古人类手脚印的年代测定及其岩面艺术价值

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地球环境学报 2023年第1期14卷 1-8页

作者：章典王蕾彬程海张海伟张盛达李腾张悦苏佳佳陈诗敏广州大学地理科学与遥感学院广州510006 西安交通大学全球环境变化研究院西安712000

青藏高原中部海拔超过4000 m的中更世古人类手脚印的发现引起了国内外古环境、考古、人类史学界的广泛关注,并予以很高评价。众多评论文章中,《河北师范大学学报(哲学与社会科学版)》上有一篇题为《西藏邱桑温泉手脚印遗迹及相关问题》... 详细信息

青藏高原中部海拔超过4000 m的中更世古人类手脚印的发现引起了国内外古环境、考古、人类史学界的广泛关注,并予以很高评价。众多评论文章中,《河北师范大学学报(哲学与社会科学版)》上有一篇题为《西藏邱桑温泉手脚印遗迹及相关问题》的文章,对手脚印研究中的“年代”和“岩面艺术如何界定”这两个方面提出了质疑。因此特撰写此文,对这两个方面的质疑做出回应。本文将系统梳理zhang et al.(2021)所发表的手脚印“岩面艺术”中有关“年代学”和“艺术界定”这两方面的内容,从U-Th测年在碳酸盐沉积中的应用和史前艺术的特征等方面来解答部分学者对此研究存在的疑虑和误导,并提出本文的看法:U-Th法是目前对邱桑温泉方解石泉华进行年龄测定的最合适方法,所测的年代是可靠的,并且“岩面艺术”一词是这些手脚印组合最适合的名称。

关键词：岩面艺术手脚印质疑年代学邱桑温泉青藏高原

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重症急性胰腺炎的现代诊断与治疗观点

肝胆胰外科杂志 1999年第2期11卷 57-57页

作者：张圣道上海第二医科大学附属瑞金医院

经过廿多年的不懈努力，重症急性胰腺炎的诊断与治疗观点终于取得了共识，代表这个时代的标志就是“１９９２年美国亚特兰大急性胰腺炎国际讨论会”以及会后发表的（急性胰腺炎临床分类）；在我国则是“１９９６年贵阳第六届胰腺外科学... 详细信息

经过廿多年的不懈努力，重症急性胰腺炎的诊断与治疗观点终于取得了共识，代表这个时代的标志就是“１９９２年美国亚特兰大急性胰腺炎国际讨论会”以及会后发表的（急性胰腺炎临床分类）；在我国则是“１９９６年贵阳第六届胰腺外科学术会议”以及会后发表的〈急性胰腺炎...

关键词：急性胰腺炎诊断治疗

Synthesis of an all-carbon conjugated polymeric segment of carbon nanotubes and its application for lithium-ion batteries

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Nano Research 2023年第7期16卷 10342-10347页

作者： shengda Wang Fei Chen Guilin Zhuang Kang Wei Tianyun Chen Xinyu zhang Chunhua Chen Pingwu Du Hefei National Research Center for Physical Sciences at the Microscale Anhui Laboratory of Advanced Photon Science and TechnologyCAS Key Laboratory of Materials for Energy ConversionDepartment of Materials Science and EngineeringiChEMUniversity of Science and Technology of ChinaHefei 230026China College of Chemical Engineering Zhejiang University of TechnologyHangzhou 310032China

The synthesis and potential applications of nanocarbon materials have attracted much attention in recent ***,we report the design and synthesis of a novel all-carbon conjugated polymeric segment of single-walled carbon nanotubes(poly(cyclo-para-phenylene)(PCPP))and its first application as an anode material for lithium-ion *** as-synthesized PCPP was characterized by Raman spectroscopy,Fourier transform infrared(FTIR),and other *** electrochemical characterization results show the suitability of PCPP as an anode material for lithium-ion *** calculations indicate the unique structural and physical properties of *** realization of PCPP expands the scope of bottom-up synthesis of uniform carbon nanotube segments and their potential applications as new materials for lithium-ion batteries.

关键词： carbon nanomaterials conjugated polymer carbon nanotubes lithium-ion batteries

Highly strengthening and toughening biomimetic ceramic structures fabricated via a novel coaxially printing

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Journal of Advanced Ceramics 2024年第4期13卷 403-412页

作者： Kunkun Song shengda Yang Ningqi Shao Yantang Zhao Peng He Yongfeng Wei Hengzhong Fan Yongsheng zhang Qiangqiang zhang State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China School of Civil Engineering and Mechanics Lanzhou UniversityLanzhou 730000China Key Laboratory of Mechanics on Disaster and Environment in Western China(Lanzhou University) Ministry of EducationLanzhou 730000.China

Additive manufacturing technology,by manipulating and emulating inherent multiscale,multi-material,and multifunctional structures found in nature,has created new opportunities for constructing heterogeneous structures associated with special properties and achieving ultra-high mechanical performance and reliability in ceramic composite *** this study,we have developed an innovative fabrication method designated as coaxial 3D printing for the synchronous construction of two constituents into ceramic composites with a tooth enamel biomimetic ***,the stiff silicate and flexible epoxy served as a strengthening bridge and toughening layer,*** method differed from the traditional approach of randomly dispersing reinforcing components within a ceramic *** allowed for the direct creation of an internally effective three-dimensional reinforcement network structure in ceramic *** process facilitated synergistic deformation and simultaneous enhancement of multiple materials and hierarchical *** to the uniform distribution of internal stress and effective block of microcrack propagation,the biomimetically structured silicate/epoxy ceramic composite has demonstrated much significant enhancement in mechanical properties,includingcompressive strength(48.8±3.12MPa),flexuralstrength(10.39±1.23MPa),andflexuraltoughness(218.7±54.6kJ/m^(3)),which was 0.5,2.1,and 47.5 times as high as those of the intrinsic brittle silicate ceramics,***-situ characterization and multiscale finite element simulation of microstructural evolution during three-point bending deformation further validated multiple-step features of the fracture process(silicate bridge fracture,interface detachment,epoxy extraction,and rupture),which benefited from interpenetrating structural features achieved by coaxial printing to accomplish with the complex propagating routines of the crack deflection in silicate ceramic *** coaxia

关键词： coaxial 3D printing silicate ceramic composites enamel biomimetic microstructure strengthening bridge tougheninglayer crackdeflection