输电线路杆塔接地降阻措施研究

在电力输送过程中,由于输电设备所经路径的地理环境比较恶劣,能否对接地装置进行合理处理,在一定程度上直接关系到电网的安全运行。本文通过阐述接地电阻的重要性,对常见的雷击故障进行深入分析,同时提出相应的防雷措施,从根本上防止电网雷害事故的发生,进而为提高输电设备防雷击能力提供参考依据。     

耐热导线与钢芯铝绞线在线路增容改造中的可行性分析

耐热铝合金导线具有耐高温运行、输送容量大、经济性能优越等特点,输送容量是同截面普通导线的2倍,能大大节约材料,是城乡电网改造工程选用的最佳材料之一。钢芯铝绞线可以通过提高运行温度增大输送容量。文章对耐热导线及钢芯铝绞线在旧线路增容改造中的可行性进行了分析,对旧线路增容改造提出了建议。     

A secure hash function based on feedback iterative structure

Rapid growth of internet data has created enormous security challenges on authenticity, availability and integrity protection of these outsourced data. Hash function is one of the main solutions to face these challenges. This paper proposes a feedback iterative structure of hash function which utilises the variable feedback to resist attacks. Furthermore, to accelerate message diffusion, two novel modules are designed, one for iteration and the other for truncation. Experimental results show that the proposed hash function can effectively resist existing attacks. Moreover, comparing with other existing hash functions, it displays better on statistical performance, collision resistance and avalanche.     

公司战略变革的权力与文化阻力及其克服

公司战略变革会引起企业利益格局重组和文化修正,从而导致权力性阻力和文化性阻力这两种关键阻力。公司战略变革的成功在于有效克服这两种阻力。权力性阻力有三种表现形式,产生原因在于权力来源和战略认知的变化,可以设计五项克服措施。文化性阻力有四种表现形式,产生原因是新战略和旧企业文化的不匹配,要从企业文化的四个表现层面设计克服措施。     

Public accountability: reforms and resistance in social housing

The paper illustrates and discusses the changing nature of public accountability relations in public services that are transferred to a mutual organization. The paper contributes to the literature that studies resistance to the neo-liberal restructuring process, highlighting civil society campaigns as important actors. A social housing case study in Britain is developed, combining a critical realist and dialogical influenced analysis. The case study identifies the role of private finance, illustrating tensions between democratic-styled and NGO-styled public accountability relations. A conclusion that housing mutuals are in danger of being apologia for private capitalism is established.     

关于山区变电站接地改造工程设计的探讨

文章通过对某变电站接地电阻偏高的原因进行探讨,并对山区变电站在接地上普遍存在的土壤电阻率高、可用场地小、地势险峻、地形复杂等困难因素进行了分析。依据典型变电站在接地改造中取得的成功经验,提出了利用深井接地、电解离子接地体,并添加长效降阻剂降阻等复合降阻措施对山区变电站进行接地设计和降阻改造的方法。     

套管抗挤强度的可靠性评价方法

套管抗挤强度是衡量套管强度性能的一项重要指标.采用置信度与可靠性设计相结合的高精度小子样方法,对阿科公司统计的套管（7in,29ppf,L80-13Cr）抗挤强度的48个试验数据进行了分析,并与阿科公司的分析方法进行了比较.初步验证了这种方法,计算结果稳定,计算精度高,可获得比API名义值较大的合理的数值结果,使套管抗挤强度性能得到更加充分的利用,并节省试样,为合理评价套管的抗挤强度提供了理论和方法,起到了优化管柱节约成本的作用.     

高碳CrMoV合金抗磨铸铁的实验研究

实验研究了一种高碳 Cr Mo V合金抗磨铸铁 ,探讨了热处理工艺和变质处理对其组织及性能的影响。结果表明 ,该材料具有较高的硬度和良好的冲击韧性 ,耐磨性优于Km TBCr15Mo3合金抗磨铸铁。     

‘Down with Big Brother!’ The End of ‘Corporate Culturalism’?

Hugh Willmott's classic 1993 JMS article, ‘Strength is Ignorance; Freedom is Slavery’, has greatly influenced how we understand culture management. It draws parallel's with George Orwell's Nineteen Eighty‐Four to reveal the totalitarian aspirations of ‘corporate culturalism’. While it is sometimes said that employee resistance is missing in Willmott's account, I argue that it is implicitly pervasive, prefiguring subsequent investigations of ‘micro‐emancipation’ in management studies. The recent waning of scholarly interest in this type of resistance, however, also points to the contemporary relevance of Willmott's analysis. Emergent forms of corporate regulation utilize ‘biopower’ rather than just cultural conformity, rendering micro‐emancipation inadequate, but inspiring other types of dissent.     

浅谈STP超薄高效保温板防火性能

外墙保温防火成为近几年社会各界普遍关心的社会问题,国家相关部门为此也颁布了相应的通知,文章是就防火性能比较优越的STP超薄高效保温板的防火性能结合实际工程施工经验进行归纳总结,从STP超薄高效保温板的基本情况、防火原理、应用范围、自身特点等方面进行了研究。