共查询到19条相似文献,搜索用时 46 毫秒
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自发过程是热力学的一个重要概念,它与热力学第二定律相结合可指明过程的方向,然而到目前为止自发过程还没有一个令人满意的定义,给物理化学教学带来了困难。为了解决此问题,针对公认的自发过程的例子进行了严格分析和总结,在此基础上指出了目前典型的自发过程定义存在的问题,指明这些问题是由人们在讨论自发过程例子时没有注意系统的划分而导致的。给出了意义明确的自发过程定义,引出了给定条件下能发生的非自发过程的概念。将这些概念和热力学第二定律相结合,得到方便实用的过程方向判据,克服了以往自发过程定义的模糊性。 相似文献
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一、综合销售(营业)价格(P_c~t) 1.综合销售(营业)价格(P_c~t)的定义 任何建设项目都以向社会提供一定数量的产品(服务)为目的。因此,每一个建设项目(不含房地产开发项目,下同)在其生产经营期(含投产期和达产期)内的任何一年,总存在一个综合销售(营业)价格(P_c~t),使下式成立: S~t=:P_c~tQ~t 或:P_c~t=S~t/Q~t………………………………………………………………………………① 其中:S~t——项目每t年的总产出,即总销售(营业)收入。 P_c~t——项目第t年的综合销售(营业)价格。 相似文献
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油气资产定义的探讨 总被引:1,自引:0,他引:1
杜增华 《石油化工技术经济》2006,22(4):58-62
油气资产对于石油开采企业意义重大,但是国内外尚没有对这一关键概念的完整定义,文章从理论界和实务界对油气资产的界定入手,经过对比分析,得出油气资产的定义,并将油气资产划分为油气储量资产和非储量油气资产,阐述了这两类油气资产之间的联系与区别。 相似文献
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通过对“功图法”计量监测系统原理、组成、实现功能的描述以及对其在安塞油田的应用评价.证明“功图法”计量监测系统测试的油井产液量值与实际单量值趋于吻合,能够反映油井的实际产液能力,满足油井计量的精度要求.为今后油田油井计量提供一个新途径. 相似文献
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油井计量采用的双容积单量方法.增加了地面建设的投资和运行成本,而且站内多井计量时很难及时进行油井产量的计量。针对这种实际情况,采用井口传感器记录抽油杆载荷与位移随时间变化的数据信息,确定出泵的有效冲程,再由固化在仪器内的数学模型求得油井产量。该计量技术通过长庆油田24口井的实际应用,取得了较好的效果。由不同产量下的测试误差分析可知,油井产量越高,测试结果越准确,对产量大于10m^3/d的油井,平均误差仅4.3%。 相似文献
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<正>《会计准则第4号—固定资产》规定,固定资产是指同时具有下列特征的有形资产:为生产商品、提供劳务、出租或经营管理而持有的;使用寿命超过一个会计年度。同时指出,作为投资性房地产的建筑物以及生产性生物资产不属于固定资产。 相似文献
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混凝土是一种易碎材料,其抗拉强度大大低于抗拉强度,从而影响了抗拉速度.混凝土电阻器通常不包括在设计应用程序中,而是弯曲和拉伸.在当前的机械技术中,混凝土梁、板、剪力墙等加固浇筑所导致的裂缝不大可能扩散.保持裂缝宽度尽可能小,以保持混凝土裂缝在防腐蚀范围内是有意义的.随着我国城市化进程的推进,工程项目的数量和规模都在增加... 相似文献
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通过对印染行业岗位群能力分析、典型工作任务归纳导出《染色实训》这门课程,按照工作过程系统化的思想,以印染加工的对象"纺织材料"为载体,进行了目标设计、教学方案设计,并讨论了课程评价方式。 相似文献
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介绍了资料处理监督工作思路和实施过程的实例,体现资料处理监督在处理过程规范等方面发挥的作用。在投资方得到勘探成果回报和处理方得到收益的同时,体现出资料处理监督存在的作用。由于处理周期等原因,往往增加了监督对处理过程问题整改的实施难度,尤其是资料处理过程的技术含量高,交互操作过程的隐蔽,过程图件隐含问题不直观,问题确定量化难,对处理监督提出了更高的要求。 相似文献
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Daming Wu 《Process Safety Progress》2020,39(1):e12120
The work safety level is a reflection of the work safety situation, but in the past, we simply used a single absolute indicator or a single relative indicator to measure the work safety level, which is inadequate. This paper chooses five relative indicators and uses grey fixed weight clustering method to give a comprehensive evaluation of the work safety level in different provinces. According to the evaluation results, we grade the work safety level of geographic and economic regions, and find the gap in different provinces and regions. Our analysis suggests that the work safety level in different provinces and regions basically accords with the stage of industrialization process, but the fluctuated data analysis indicates that the theory of the relationship between the work safety and industrialization process has its defects, and the warped-tail phenomenon of work safety level in the final and mature stage of industrialization process is thus pointed out. Taking the comparison between Henan and Shanghai as an example of the analysis of the warped-tail phenomenon, the factors related to the work safety level in the final and mature stage of industrialization process are discussed. 相似文献
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中国证券市场监管有效性研究 总被引:7,自引:0,他引:7
本文通过对监管部门等进行问卷调研,提炼和归纳了判别监管有效性的6个标准:综合性、针对性、严密性、前瞻性、权威性、及时性,从逻辑上论证了6个标准很好地满足了促进性、判别性、独立性、完整性这4个条件;引入并运用层次分析法对6个判别标准的重要性排序进行了实证研究,根据所有被调查者整体组合的综合权重向量,建立了监管有效性模型。论文分别运用七级标度、有效性模型,分两个阶段对中国证券市场监管有效性进行实证检验,一并加以比较。结论是二者结果相近,由此证明了6个判别标准及其有效性模型的适用性。研究发现,所有被调查者对中国证券监管效果的整体评价和对具体政策效果的评价都没有达到及格水平,得分最低的是前瞻性。 相似文献
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Managerial control and the limits to employee participation in retail work spaces: evidence from a UK IKEA store
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This article contributes to labour process debates around managerial control and worker autonomy in the retail workplace. Through critical analysis of managerial strategies in the production of organisational space within an IKEA store, it explores how spatial design and practice shape managerial control and employee participation. Rather than the rhetoric of employee participation espoused by IKEA, our findings emphasise how managers use space to foster employee commitment to corporate objectives. While employees do exercise their own agency and spatial practice, their actions are moulded and constrained by dominant organisational structures and managerial strategies. As such, the article augments existing labour process research by developing new insights about how the spatial dimension shapes managerial control in retail workplaces. Although workers are far from the passive recipients of management decisions apparent in much labour process theory, their participation largely serves the strategic visions and spatial plans of their employer. 相似文献
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工作分享机制对提高员工的工作满意度,减少人才流失有着重要的作用。阐明煤炭企业实施工作分享机制的意义,初步提出一套评价煤炭企业工作分享机制适用性的层次模型,运用层次分析法与灰色关联分析法相结合的综合评价方法,对煤炭企业工作分享机制适用性进行了综合评价。 相似文献
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Jeremy Aroles Nathalie Mitev Franois‐Xavier de Vaujany 《New Technology, Work and Employment》2019,34(3):285-299
Both shaping and shaped by technological, economic and social facets, the world of work has witnessed a wide array of changes. This review article sets out to provide a synthesis of some of the main directions and insights of existing research connected to the new world of work. In particular, we approached the topic of new work practices through four key dimensions: (1) Conceptual and methodological dimensions in the study of new work practices; (2) Spatial and temporal manifestations of new work practices in the collaborative economy; (3) Individuals, organizations and new work configurations; (4) Power and control. The review article critically discusses the future of work and argues that the ‘new’ world of work simply repeats asymmetrical power relations and inequalities that characterise work activities, with the potential of exacerbating even further disparities, inequalities and precarity. 相似文献
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With reference to the performance management research agenda, this article focuses on the politics of production in food manufacturing and distribution companies in the supermarket supply chain. Burawoy's concept of ‘factory regimes’ is utilised to explore the broader context of labour process change in inter‐linked organisations in the retail supply chain. The article examines the extent to which new despotic or coercive regime characteristics are emerging that weakens the power of both suppliers and labour. In revealing changes in the nature and dynamics of performance regimes within these organisations, the article exposes the connections and linkages between workplaces as distinct moments in the integrated circuit of capital. 相似文献