10kV小电阻接地系统电流互感器配置

对10 kV小电阻接地系统电流互感器的配置进行分析和探讨,提出具体的配置方案,并进行比较,从而选择合理的配置方案。     

电动机综合控制技术

本文的电动机控制技术,是以"变相电阻"为基础,以控制电动机转子电流为核心,包括电动机的启动、调速技术。通过斩波技术,实现转子阻抗的变化,控制转子电流。     

基于ADS1248高精度测温装置的设计

针对疫苗的运送及仓储过程中对环境温度的严格要求,设计了高精度的测温装置。选用了Pt100作为温度传感器,采用四线制测量方法去除了传输线上的干扰,设计了比例测量法使系统的精度仅依赖于一个高精度电阻。选用的ADS1248芯片内部包含了PGA放大器及24位ADC芯片,降低了装置的复杂性,同时具有较高的分辨率。经测试,本装置的测温精确达到0.1℃,能够满足疫苗的运送及仓储的要求。     

论Lab-Corder测量太阳电池伏安特性的实验技巧

在Lab-Corder测量太阳电池伏安特性实验中,只要改变二个可变电位器的负载大小,就可以完成本实验的数据测量.但Lab-Corder采集到的数据及图形往往不是很理想,达不到预期的结果.在实验过程中如何进行才能得到我们想要的实验结果呢？在本实验中实验的技巧是至关重要的一环,本文重点探讨其实验的技巧及方式方法对实验的结果影响.     

泰安市粮库进行灯光诱捕储粮害虫试验

简单介绍了泰安市粮库进行灯光诱捕储粮害虫的试验过程及实际应用效果。     

United we stand,divided we fall: the failure of an accounting information system in a major radiology provider

This article explores the way in which a major Australian radiology organization implemented a complex accounting information system and how workers in the 72 radiology practices that had to use it resisted the change. The study reports on the issues that led to the circumvention of the system by individuals and, after only three years, complete withdrawal of the accounting information system by the parent organization. This article has implications for firms in the health care and other sectors considering implementing new accounting information systems. Organizations need to incorporate change management techniques and provide open communication to all stakeholders to minimize disruption and potential problems.     

On market forces and adjustments: acknowledging consumer creativity through the aesthetics of ‘debadging’

Abstract

This paper explores the social dynamics by means of which market forces are enacted at the level of everyday consumption. In particular, it draws on Holt's (2002 Holt, D.B. 2002. Why do brands cause trouble? A dialectical theory of consumer culture and branding. Journal of Consumer Research, 29: 70–90. [Crossref], [Web of Science ®] , [Google Scholar]) notion that as ‘unruly bricoleurs’, consumers kick-start processes of market adjustment and innovation through improvising ways to negotiate the demands of daily life. In this way, consumers can become active players in realising new possibilities for identity construction and empowerment that involve the creative re-appropriation of marketer-based meaning. To investigate those issues, we turn to a virtual community in the empirical setting of car customisation. Over an eight-month period, an internet-based methodology generated textual observations of online posting activity on five internet newsgroups attracting those interested in the particular pursuit of car modification. Participants used those web-forums to share information, passions, and enthusiasms. Analysis shows that grounded aesthetics function as vehicles for creativity and the reworking of dominant market logics (Vargo & Lusch, 2004 Vargo, S.L. and Lusch, R.F. 2004. Evolving to a new dominant logic for marketing. Journal of Marketing, 68: 1–18. [Crossref], [Web of Science ®] , [Google Scholar]). We conclude that online discussion threads offer valuable access to the emergent interplay of discursive resources in circulation among virtual communities and that this has implications for the conduct of environmental scanning. The paper illustrates how the discursive resource-base is nurtured, sustained, and transformed through various interpellations, including performing claims to prestige and self-defining distinctions, as well as constructing narratives of personal history and social dynamics.     

Falling walls and lifting curtains: analysis of border effects in transition countries

Since McCallum's (1995 McCallum, J. 1995. National borders matter: Canada-US regional trade patterns. American Economic Review, 85(3): 615–23. [Web of Science ®] , [Google Scholar]) finding of surprisingly high border effects on trade between the US and Canada, there have been a number of studies on other parts of the world, and improvements made to the gravity model to measure this effect accurately. This paper suggests some other modifications to the model, and applies it to a region of the world that presents a distinctly interesting case. Changes in border effects of formerly socialist countries in Central and East Europe, and countries in the former Soviet Union are analyzed during 1976–2002 at country and sectoral levels, and also with respect to blocs of countries. A discussion on cross-country variations in border effects follows the computations.     

A discussion of the market and policy failures associated with the adoption of herbicide-tolerant crops

Weed control in the U.S. Midwest has become increasingly herbicide-centric due to the adoption of herbicide-tolerant (HT) crops in the 1990s. That integrated weed management (IWM) practices, including ecological and mechanical controls, are scarcely used is concerning. IWM would be a more sustainable form of farming for two reasons. First, it would reduce the negative health and environmental externalities associated with herbicide use. Second, it would reduce the selection pressure on weed populations and the development of weed resistance to some herbicides, thereby reducing the uncertainty of the long-term effectiveness of herbicidal weed control. In this context, we develop an economic framework to clarify the interplay among the different market failures that either contribute to the herbicidal ‘lock-in’ or make it problematic. We then analyse the evidence for and perceptions of these market failures based on twenty-four semi-structured interviews with farmers and experts conducted in 2017, as well as on discussions in the academic literature. To this end, we put into perspective the possible self-reinforcing effects in the adoption path of HT crops, such as increasing farm size, changes in farm equipment, increasing incentives for simplified crop rotations, and the loss of practical knowledge of IWM practices.     

醇基涂料的研究现状与展望

介绍了醇基涂料的应用和研究现状,简述了消失模醇基涂料、V法醇基涂料、湿型砂醇基涂料、醇基流涂涂料以及厚大铸钢件醇基涂料的相关研究及应用效果,分析了醇基涂料的主要性能,如悬浮性、抗粘砂性等的研究成果,以及醇基涂料的性能要求和发展趋势,指出耐火骨料的粒度、级配和悬浮剂的选用对改善涂料悬浮性有重要作用,纳米复合悬浮剂、改性悬浮剂的使用使涂料悬浮性得到显著提高;不同粒度组合的耐火骨料和助熔剂的加入能改善涂料的抗粘砂性能,而转移涂料、醇基粉状涂料是未来醇基涂料的发展趋势,得出应研发具有水与醇兼溶的特殊悬浮剂和黏结剂来进一步提高涂料的悬浮性以及研制出强度高、抗开裂的高强涂料来提高涂料的抗粘砂性能。