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, 2018 随着市场经济的不断发展和完善，合同已成为市场经济主体之间进行合作的重要方式，对合同的管理已成为地勘单位经济管理的重要组成部分。因此，加强合同审查把关，从源头上防范法律风险，对提高地勘单位管理水平和经济效益起着极大的推动作用。
军秀 刘
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, 2005 采用数值分析的方法,对含三维埋藏椭圆型裂纹的构件放电瞬间的耦合场进行分析。计算脉冲放电瞬间椭圆形裂纹尖端附近的温度场和等效应力场的分布状态;并通过改变模型尺寸的模拟分析影响放电参数的主要因素。计算结果表明,由于电流绕流产生的焦耳热源的作用,裂纹尖端处温度瞬时急剧升高,但沿椭圆形裂纹尖端的温度值并不相同,最大值发生在长轴附近,只要放电电流的强度足够大,可以使椭圆环形裂尖均熔化形成焊口,并围绕环形裂纹尖端附近产生很大的热压应力场,可有效地遏制裂纹的扩展;在相同放电电流强度下 ...
白象忠, 郑丽娟, 付宇明
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Rare Metals, Volume 45, Issue 11, November 2026.ABSTRACT Defect engineering plays a crucial role in regulating the active sites and reaction pathways of nanozymes. In this work, oxygen vacancies (Vo) were successfully introduced and stably regulated in ternary CoFeMo layered double hydroxide (CFM LDHs) via a microwave‐assisted hydrothermal strategy, leading to the construction of oxygen‐vacancy‐rich
Min An +8 more
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Dizhen xuebao地震预测，尤其是大地震的物理机制和孕震过程，仍然是未完全解决的科学难题。由于10—15 km深度的地壳原位直接实测资料匮乏，利用时变地球物理场（地震波场、重力场、电磁场和形变场）开展研究，成为探查地壳深部动力学过程和强震孕震环境的重要手段。本文聚焦于三个核心科学问题：深部流体如何通过断层阀机制调控地震成核与触发、不同地球物理场的前兆异常是否源于同一流体驱动过程、如何构建物理模型驱动的多场综合监测预测框架，在系统地梳理大陆强震成因机制与前兆异常识别最新研究进展的基础上，整合了超深层油气勘探万米深钻实测成果、
Xu Wu +3 more
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Rare Metals, Volume 45, Issue 11, November 2026.ABSTRACT Ensuring uncompromised safety across interconnected domains is vital for global societal sustainability. Metal–organic framework (MOF)‐based nanocomposites, owing to their intrinsically tunable structures and broad functional versatility, represent a powerful class of materials for safety‐related engineering.
Rongfu Peng +6 more
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Rare Metals, Volume 45, Issue 11, November 2026.ABSTRACT The lack of diverse active sites in single‐component catalysts inevitably leads to a competitive adsorption dilemma between 5‐hydroxymethylfurfural (HMF) and OH−, impeding the kinetics of electrocatalytic oxidation of HMF (EC‐HMFOR). Herein, we deliver an interfacial engineering strategy by constructing a rare‐earth metal oxide heterostructure
Ruijia Cao +4 more
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Gaoya dianqi, 2015 文中采用Deutsch假设和现场实测相结合的方法,分析了特高压、并行双回特高压直流输电线路下地面合成场强的分布特性。结果表明:基于Deutsch假设计算的结果与实测结果吻合,适用于实际工程合成场强的预测。双回特高压直流线路并行时,由于空间正负离子流的相互影响作用,其场强分布与导线排列方式有较大关系,两回路线路内侧极性相同时,并行线路之间区域合成场强较单回增加,内侧极性相反时,并行线路之间区域场强较单回减小。同时,随着两回线路之间距离的减小,或线路高度的增加,与单回路相比 ...
杨小玲 +4 more
doaj
World Food Policy, Volume 12, Issue 2, November 2026.ABSTRACT Agricultural development initiatives in sub‐Saharan Africa have emphasized improved crop varieties as a pathway to food security, resilience, and rural poverty reduction. However, empirical evidence often focuses narrowly on plot‐level outcomes and overlooks whole‐farm effects and the substantial heterogeneity in farmers' management practices,
Kodjo Kondo +4 more
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Policy Studies Journal, Volume 54, Issue 4, November 2026.ABSTRACT Artificial intelligence (AI) has gained much interest in public administration and public policy fields in recent years. Research on and that uses AI has so far treated it as an object or context within the broader administrative and governance discourse.
Yanto Chandra, Jianxiang Tan
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Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Surface‐enhanced Raman scattering (SERS) has emerged as a highly sensitive and specific technique for tumor imaging, owing to its narrow spectral features, resistance to photobleaching, and capability for multiplexed detection. However, its clinical translation remains limited by poor tissue penetration and the absence of intrinsic anatomical ...
Xinyu Miao +7 more
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