Results 71 to 80 of about 20,428 (239)
, 2014 我国各地实施的预制装配式混凝土结构体系类型少,建筑的使用功能、高度、层数、抗震设防烈度等适用范围要求严格。保证较高的预制装配率,充分发挥预制、装配提供的技术优势,未来预制装配式混凝土结构技术在构件、结构等方面可以获得很大发展。可以将预应力技术、高强和高性能材料技术、新型结构构件技术等有利于提高构件性能的技术用在预制构件上。可以将隔震和消能减震技术、人工塑性铰、加设支撑、关键部位性能提升技术、主次结构设计技术等有利于提高结构性能的技术应用在建筑结构上。发挥叠合构件部分现浇处理的优势,与建筑和设备专业配合 ...
林树枝, 石建光
core
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT The development of efficient and stable bifunctional catalysts remains a key challenge for green hydrogen production via electrochemical water splitting. In this study, a bimetallic Mo/Fe‐doped CoP2 nanoleaf array anchored on carbon cloth (Mo, Fe‐CoP2@CC) was synthesized from zeolitic imidazolate framework‐L (ZIF‐L) via an ion‐exchange and low‐
Xiangqun Zeng +6 more
wiley +1 more source
Automatic Grid Generation of CAD for Gear Reducer Housing
Jixie chuandong, 1994 本文针对齿轮减速机ＣＡＤ过程中箱体类复杂板块组合结构有限元强度分析的特点，提出了基于等参数变换法的三维有限元组合网格自动生成方法，其特点是可将大型复杂结构自动离散为不同单元组成的网格，且可避免过渡单元，特别适用于复杂板块组合结构的有限元分析。
程燕青
doaj
Competition and Co-existence of the Multi-dimensional Discourse System: Contemporary China TV Culture Research [PDF]
, 2008 内容摘要 在学术界关于“媒介时代”的探讨中，电视作为当代媒介文化的一种重要形式而成为关注焦点。相应地，对中国电视文化进行现象研究的众多论著也成为学术界的一大景观。尽管相关成果已经不少，但电视文化仍蕴藏着有待探索的巨大空间。电视的技术在发展、内容在更迭、环境在变化，最重要的是电视的思维和理念也总在接受新的挑战。因此，本文仍然选择把中国电视文化作为研究课题。 本文力求从“话语”的角度，对中国当代电视的竞争格局及其深层寓意进行探析。中国电视由统一的垄断性的总体性媒体领域分化成各不相同的多元竞争的媒体地带的过程，
荣耀军
core
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Expanding near‐infrared (NIR) spectral response and utilizing ultraviolet (UV) photons are effective strategies for enhancing the power conversion efficiency (PCE) of lead halide perovskite solar cells (PSCs). However, the range of NIR spectral response extension and the utilization of UV light for devices are not enough, and the loss of ...
Li He +9 more
wiley +1 more source
Study on long-term behavior of steel-reinforced concrete columns under axial sustained compression [PDF]
, 2014 随着国民经济的快速发展，钢骨混凝土结构的应用越加广泛，人们对钢骨混凝土结构的了解也越来越全面和深入，目前，对于钢骨混凝土柱的研究主要是集中在其极限承载力、粘结强度与抗震性能等方面，对于长期荷载作用下混凝土的收缩、徐变等力学特性的研究还较少。而且目前对钢-混凝土组合结构的长期荷载作用的性能的试验与理论研究主要还是针对钢管混凝土。然而，由于钢管混凝土中的混凝土处于钢管内，而钢骨混凝土中的混凝土则是外露于环境中，二者在长期荷载作用下的收缩和徐变特性必然会不同 ...
吴建清
core
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Lung cancer remains the leading cause of cancer‐related deaths worldwide, yet immune checkpoint blockade (ICB) is often compromised by an immunosuppressive tumor microenvironment (TME) with acidosis, hypoxia, and poor T cell infiltration. Here, we develop a TME‐responsive nanoplatform (MgH2@Lip/PD‐L1) that couples hydrogen gas therapy with PD ...
Xuyu Gu +5 more
wiley +1 more source
Study on Modern Portfolio Theory of China [PDF]
, 2005 介绍资产组合理论在我国的研究情况,分析卖空在模型中的作用,求解不允许卖空条件下含风险证券和无风险证券的马克维兹模型的树形算法。This article introduces the research condition of the modern Portfolio theory China under no addimission conditions and analyses the usage of short sale.It introduces how to solve the tree ...
刘铁锤
core
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Recently, cobalt/nitrogen co‐doped materials have emerged as heterogeneous catalysts to activate peroxymonosulfate (PMS) and have been applied to advanced oxidation processes for environmental remediation. However, their recyclability and reusability remain major barriers to practical application.
Wen‐Kai Zhu +11 more
wiley +1 more source
, 2002 目前我国养老保险制度存在的问题是 :个人账户“空壳化” ;养老保险基金缺口巨大 ;养老保险基金贬值严重。改革对策是 :社会统筹与个人账户分开管理 ;发展私人养老保险基金管理公司管理个人账户 ;取消养老保险基金投资范围限制 ,对其开放资本市场 ...
汪美荣
core +3 more sources