共查询到19条相似文献,搜索用时 125 毫秒
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介绍了化工企业在统计方面的一些工作思路,从统计工作规范化建设、加强统计工作服务功能和化工生产统计指标改革等三方面重点突出了统计工作的一些做法和改革思路。 相似文献
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环境统计是用数字反映并计量人类活动引起的环境变化和环境变化对人类影响的工作。环境统计可为政府部门制定环境政策和环境规划,预测环境资源的承载能力等提供依据。同样,对危险废物的环境统计,是环保部门获取企业废物产生及其流向信息,科学制订废物防治策略的重要手段。同时,也可以从企业上报的危险废物的统计数字上,总结出工作中存在的问题并提出解决办法。 相似文献
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随着我国经济的不断发展,环境问题越来越受到重视,环境统计工作是环境保护部门的基础性工作之一,为各种环保政策的制定提供了有效依据,因此对统计数据的准确性、及时性等提出了更高的要求。本人根据所从事的环境统计工作经历,从所了解和掌握的情况,分析对目前环境统计工作存在的几点问题,并提出建议。 相似文献
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我国自1983年开展环境统计工作以来,环境统计范围不断扩展,环境统计制度不断完善,环境统计数据在综合反映环境状况、服务环境管理和科学决策方面起到了重要的基础性作用。随着我国经济的快速发展,环境问题越来越受到重视,对环境统计数据的需求越来越多,对环境统计在全面性、及时性、准确性以及综合分析等方面提出更高的要求。现行的环境统计已不适应形势发展的需要,必须进行改革。要加强环境统计工作改革步伐,简化指标,提高效率,要及时、准确地提供统计数据,客观地反映经济发展与环境形势的变化,真正为环境管理和决策服务。 相似文献
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随着社会经济的高速发展,社会各界越来越关注工业企业的环境问题。本文基于工业企业环境统计工作的特点进行分析,并对工业企业环境统计工作存在的问题进行了探讨,并结合个人炼焦企业环境工作的相关经验尝试性提出改善措施,从而提升统计工作的质量。 相似文献
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外标法、内标法双结合的分析方法的应用 总被引:1,自引:0,他引:1
随着国家和社会对环境污染的重视,对水质的分析也越来越重要。由于水中杂质含量很少,样品处理过程会带来误差,但对其分析精度的要求却很高,这给分析工作造成一定的困难。文章采用了内标、外标双结合方法对水质中一些特征污染物进行分析。 相似文献
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The Calculation of Some Limiting Distributions Arising in Near‐Integrated Models with GLS Detrending
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Marcus J. Chambers 《时间序列分析杂志》2015,36(4):562-586
Many unit root test statistics are based on detrended data, with the method of generalized least squares (GLS) detrending being popular in the setting of a near‐integrated model. This article determines the properties of some associated limiting distributions when the GLS detrending is based on a linear time trend. A fundamental result for the moment generating function of two key functionals of the relevant stochastic process is provided and used to compute probability density functions and cumulative distribution functions, as well as means and variances, of the limiting distributions of some statistics of interest. The exact moments and percentiles of some of these distributions are compared with those obtained by simulations, and it is found that, even with a large number of replications and a large sample size, the errors resulting from the simulation methods are not negligible. Some further applications, including a comparison of limiting power functions of different unit root test statistics and the consideration of a more complicated statistic, are also provided. 相似文献
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H. Anlauf 《Drying Technology》2006,24(10):1235-1241
Separation of particles from liquids is an extremely widespread problem, which has to be solved under very different aspects in nearly all industrial production processes, in environmental protection, in water purification, and every day in our personal lives. The very different nature of separation problems has led to the development of a large number of mechanical separation principles. Although a lot of successful research work has been done in the past, there are still today many open questions left about process understanding and calculation. After a systematic view to the different physical principles of mechanical solid-liquid separation processes, some recent developments are discussed more in detail. 相似文献
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H. Anlauf 《Drying Technology》2013,31(10):1235-1241
Separation of particles from liquids is an extremely widespread problem, which has to be solved under very different aspects in nearly all industrial production processes, in environmental protection, in water purification, and every day in our personal lives. The very different nature of separation problems has led to the development of a large number of mechanical separation principles. Although a lot of successful research work has been done in the past, there are still today many open questions left about process understanding and calculation. After a systematic view to the different physical principles of mechanical solid–liquid separation processes, some recent developments are discussed more in detail. 相似文献
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统计过程控制(SPC)是质量管理中常用的一种技术,将它应用于石墨电极生产的过程控制与管理工作中,一方面可使质量管理工作更具系统性与科学性,另一方面也为生产过程的工艺调整与控制提供了必要的技术依据,本文介绍了统计过程控制(SPC)在超高功率石墨电极生产过程中的应用以及由此产生的工作、技术和经济效果。 相似文献
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Process retrofit (PR) is becoming a key issue for many existing industrial chemical processes due to the changing prices and market conditions, the emerging new design methodologies, as well as to environmental regulations. PR is sometimes far more complicated than process grassroots design, and it is usually team‐based work in which many departments and disciplines are concerned. Thus, it is very important to rationally organize the work and cooperation of the team members involved in the PR project. In this paper, we present some insights on the significance of PR, the methods for identifying the bottlenecks, as well as the principles and strategies of completing a retrofit project. A systematic procedure for process retrofits is developed based on the experience of several industrial retrofit projects. 相似文献