检索结果-南通市图书馆

Acta Metallurgica Sinica(English Letters) 2024年第7期37卷 1128-1134页

作者： Ping Li Shuangwu Xia Junfu Dong liangwei dai Zhicheng Luo Kemin Xue School of Material Science and Engineering Hefei University of TechnologyHefei230009China

The Mg–Zn–Gd alloy with quasicrystal icosahedral phase was processed by high-pressure torsion (HPT). The effect of bimodal I-phase on the dynamic recrystallization was analyzed by transmission electron microscopy. The results showed that the block I-phase can stimulate obvious particle-stimulated nucleation and dynamic recrystallization (DRX) grains were preferentially formed after HPT for 5 turns, while the granular I-phase only promoted the generation of sub-grains. The orientation relationship was determined as twofold//[1210] and fivefold//(0002)_(Mg). Moreover, after HPT for 9 turns, the DRX grains induced by block I-phase appeared to grow up and coarsened. Compared with block I-phase, the grains induced by granular I-phase presented much smaller size and distributed more homogeneous due to the strong pinning effect.

关键词： High-pressure torsion(HPT)-Quasicrystal phase Dynamic recrystallization Particle-stimulated nucleation Orientation relationship

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

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

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

在线全文

学校读者我要写书评

暂无评论

冗余资源、核心企业知识杠杆与集群协同创新

创新与创业管理 2022年第2期 159-183页

作者：李宇代良伟东北财经大学工商管理学院大连116025 东北财经大学辽宁(大连)自贸区研究院大连116025

选择2003~2018年中国沪深A股市场467家企业作为研究样本,探索了产业集群层面不同类型冗余资源(slack resource)的利用式和探索式两种创新转化机制,以及核心企业的知识杠杆行为如何跨层次影响集群创新。实证结果表明,集群根据自身冗余资... 详细信息

选择2003~2018年中国沪深A股市场467家企业作为研究样本,探索了产业集群层面不同类型冗余资源(slack resource)的利用式和探索式两种创新转化机制,以及核心企业的知识杠杆行为如何跨层次影响集群创新。实证结果表明,集群根据自身冗余资源类型形成不同的创新路径;通过创新主体对两种冗余资源的不同利用方式,实现集群整体协同创新水平的提升。具体而言,冗余资源与协同创新之间存在倒“U”形关系,当两种类型的冗余资源超过一定规模时,整体协同创新水平不升反降;企业层面,核心企业的知识杠杆对整体资源利用和创新成果转化的作用“涌现”至集群层面,促进整体协同创新水平的提升。最后针对冗余资源有效配置与集群协同创新发展问题对企业和政府提出管理建议。

关键词：产业集群核心企业协同创新冗余资源知识杠杆

The Effects of PTK Inhibitor on TGF-stimulated Cell Proliferation and DNA Synthesis of Gastric Carcinoma

在线全文

学校读者我要写书评

暂无评论

胃肠病学 2000年第B8期5卷 138-138页

作者： ZhangWan-dai liangwei-jiang ChenHong InstituteofPLAforDigestingDiseases NanfangHospitalTheFirstMilitaryMedicalUniversityGuangzhou510151China

Tranylcypromine upregulates Sestrin 2 expression to ameliorate NLRP3-related noise-induced hearing loss

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第5期20卷 1483-1494页

作者： Xihang Chen Zhifeng Chen Menghua Li Weiwei Guo Shuolong Yuan liangwei Xu Chang Lin Xi Shi Wei Chen Shiming Yang Senior Department of Otolaryngology Head and Neck Surgery Chinese PLA General HospitalChinese PLA Medical SchoolBeijingChina State Key Laboratory of Hearing and Balance Science BeijingChina National Clinical Research Center for Otolaryngologic Diseases BeijingChina Key Laboratory of Hearing Science Ministry of EducationBeijingChina Beijing Key Laboratory of Hearing Impairment Prevention and Treatment BeijingChina Department of Otorhinolaryngology Head and Neck Surgery The First Affiliated Hospital of Fujian Medical UniversityFuzhouFujian ProvinceChina Department of Otolaryngology Head and Neck Surgery The 940th Hospital of Joint Logistics Support Force of Chinese PLALanzhouGansu ProvinceChina Key Laboratory of Tropical Biological Resources of Ministry of Education School of Pharmaceutical SciencesHainan UniversityHaikouHainan ProvinceChina Academician Workstation of Hainan University School of Pharmaceutical SciencesYazhou BaySanyaHainan ProvinceChina

Noise-induced hearing loss is the primary non-genetic factor contributing to auditory ***,there are currently no effective pharmacological interventions for patients with noise-induced hearing ***,we present evidence suggesting that the lysine-specific demethylase 1 inhibitor–tranylcypromine is an otoprotective agent that could be used to treat noise-induced hearing loss,and elucidate its underlying regulatory *** established a mouse model of permanent threshold shift hearing loss by exposing the mice to white broadband noise at a sound pressure level of 120 d B for 4 *** found that tranylcypromine treatment led to the upregulation of Sestrin2(SESN2)and activation of the autophagy markers light chain 3B and lysosome-associated membrane glycoprotein 1 in the cochleae of mice treated with *** noise exposure group treated with tranylcypromine showed significantly lower average auditory brainstem response hearing thresholds at click,4,8,and 16 k Hz frequencies compared with the noise exposure group treated with *** findings indicate that tranylcypromine treatment resulted in increased SESN2,light chain 3B,and lysosome-associated membrane glycoprotein 1 expression after noise exposure,leading to a reduction in levels of 4-hydroxynonenal and cleaved caspase-3,thereby reducing noise-induced hair cell ***,immunoblot analysis demonstrated that treatment with tranylcypromine upregulated SESN2 expression via the autophagy *** treatment also reduced the production of NOD-like receptor family pyrin domaincontaining 3(NLRP3)*** conclusion,our results showed that tranylcypromine treatment ameliorated cochlear inflammation by promoting the expression of SESN2,which induced autophagy,thereby restricting NLRP3-related inflammasome signaling,alleviating cochlear hair cell loss,and protecting hearing *** findings suggest that inhibiting lysine-specific demethylase 1 is a

关键词： 4-hydroxynonenal apoptosis autophagy cleaved caspase-3 inflammation NOD-like receptor family pyrin domain-containing 3(NLRP3) noise-induced hearing loss oxidative stress Sestrin2 tranylcypromine

Cool-Tech^(TM)变频技术在无霜冰箱上的应用(二)

在线全文

学校读者我要写书评

暂无评论

家电科技 2018年第2期 64-65页

作者：李祥戴良伟杭州士兰微电子股份有限公司浙江杭州310012

针对目前应用广泛的变频冰箱压缩机控制方案,分析并仿真了功率器件的损耗组成成分,并根据仿真结果针对性地提出将超结功率MOSFET应用到压缩机控制逆变器上。仿真及实测结果均表明,基于超结功率MOSFET的Cool-TechTM变频技术可以明显地降... 详细信息

针对目前应用广泛的变频冰箱压缩机控制方案,分析并仿真了功率器件的损耗组成成分,并根据仿真结果针对性地提出将超结功率MOSFET应用到压缩机控制逆变器上。仿真及实测结果均表明,基于超结功率MOSFET的Cool-TechTM变频技术可以明显地降低逆变器的热量损耗,提高变频冰箱产品COP值。

关键词：变频冰箱 IGBT 超结功率MOSFET 热量损耗 COP

Cool-Tech^(TM)变频技术在无霜冰箱上的应用(一)

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

家电科技 2018年第1期 44-45,51页

作者：戴良伟张斌杭州士腾科技有限公司浙江杭州310030

分析对比了正弦波FOC驱动与传统方波驱动的工作原理及优缺点。从软件算法及硬件损耗两个角度,提出了一种全新的Cool-Tech^(TM)变频驱动技术。通过试验验证,基于Cool-Tech^(TM)变频驱动技术的变频板匹配协同,能够实现不更换其他部件的情... 详细信息

分析对比了正弦波FOC驱动与传统方波驱动的工作原理及优缺点。从软件算法及硬件损耗两个角度,提出了一种全新的Cool-Tech^(TM)变频驱动技术。通过试验验证,基于Cool-Tech^(TM)变频驱动技术的变频板匹配协同,能够实现不更换其他部件的情况下,提高压缩机运行COP值,提高了转速稳定度,降低无霜冰箱整机耗电量。

关键词： Cool-Tech(TM) 变频压缩机转矩补偿功耗无霜冰箱

Overview of in-situ oxygen production technologies for lunar resources

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 233-255页

作者： Youpeng Xu Sheng Pang liangwei Cong Guoyu Qian Dong Wang Laishi Li Yusheng Wu Zhi Wang College of Materials Science and Engineering Shenyang University of TechnologyShenyang 110870China CAS Key Laboratory of Green Process and Engineering National Engineering Research Center for Green Recycling of Strategic Metal ResourcesInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China Innovation Academy for Green Manufacture Chinese Academy of SciencesBeijing 100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing 100049China

The rich resources and unique environment of the Moon make it an ideal location for human expansion and the utilization of extraterrestrial ***,crucial for supporting human life on the Moon,can be extracted from lunar regolith,which is highly rich in oxygen and contains polymetallic *** oxygen and metal extraction can be achieved using existing metallurgical ***,the ample reserves of water ice on the Moon offer another means for oxygen *** paper offers a detailed overview of the leading technologies for achieving oxygen production on the Moon,drawing from an analysis of lunar resources and environmental *** delves into the principles,processes,advantages,and drawbacks of water-ice electrolysis,two-step oxygen production from lunar regolith,and one-step oxygen production from lunar *** two-step methods involve hydrogen reduction,carbothermal reduction,and hydrometallurgy,while the one-step methods encompass fluorination/chlorination,high-temperature decomposition,molten salt electrolysis,and molten regolith electrolysis(MOE).Following a thorough comparison of raw materials,equipment,technology,and economic viability,MOE is identified as the most promising approach for future in-situ oxygen production on the *** the corrosion characteristics of molten lunar regolith at high temperatures,along with the Moon's low-gravity environment,the development of inexpensive and stable inert anodes and electrolysis devices that can easily collect oxygen is critical for promoting MOE technology on the *** review significantly contributes to our understanding of in-situ oxygen production technologies on the Moon and supports upcoming lunar exploration initiatives.

关键词： lunar resources in-situ oxygen production space metallurgy molten lunar regolith electrolysis

Cool-Tech^(TM)变频技术在无霜冰箱上的应用(三)

在线全文

学校读者我要写书评

暂无评论

家电科技 2018年第3期 58-59页

作者：戴良伟李坤浩杭州士腾科技有限公司浙江杭州310030

针对变频冰箱压缩机,Cool-Tech^(TM)变频技术在软件方面设计了基于电流前馈的转矩补偿算法;在硬件方面选用了士兰微高性能低功耗单片机和定制的超结功率MOSFET。通过实验表明,相比正弦变频器和传统的方波变频器,Cool-Tech^(TM)变频技术... 详细信息

针对变频冰箱压缩机,Cool-Tech^(TM)变频技术在软件方面设计了基于电流前馈的转矩补偿算法;在硬件方面选用了士兰微高性能低功耗单片机和定制的超结功率MOSFET。通过实验表明,相比正弦变频器和传统的方波变频器,Cool-Tech^(TM)变频技术在对变频器硬件和软件优化后,能有效地降低系统的噪声和振动,降低变频器功耗,提高系统的COP值。

关键词：变频冰箱转矩补偿噪声和振动无感 COP

在线全文

学校读者我要写书评

暂无评论

强规划的最小期望权值求解算法

计算机与数字工程 2018年第5期46卷 851-856,889页

作者：袁润文中华戴良伟陈秋茹湘潭大学信息工程学院湘潭411105 湖南工程学院湖南省风电装备与电能变换协同创新中心湘潭411104 湘潭大学智能计算与信息处理教育部重点实验室湘潭411105

随着人工智能的快速发展,智能规划中的不确定规划问题逐渐成为研究热点。在不确定系统中,由于受外部干扰因素影响,状态转移和到达结果都是不确定的,并且不确定转移系统执行动作需要花费一定代价。针对该问题,对不确定系统中的动作赋权值... 详细信息

随着人工智能的快速发展,智能规划中的不确定规划问题逐渐成为研究热点。在不确定系统中,由于受外部干扰因素影响,状态转移和到达结果都是不确定的,并且不确定转移系统执行动作需要花费一定代价。针对该问题,对不确定系统中的动作赋权值,用概率分布表示状态转移的不确定性,提出强规划解的期望权值,设计了求最小期望权值强规划解的方法。该算法首先将不确定规划问题中的目标状态集并入已搜索状态集,运用反向搜索求最小期望权值强规划解;在搜索过程中,需不断将最小期望权值所对应状态并入已搜索状态集,并更新未搜索状态集,迭代上述搜索步骤,直到已搜索状态集不变化为止,从而找出最小期望权值强规划解。

关键词：人工智能不确定规划强规划解概率分布期望权值反向搜索