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石油和化工行业一直是国家经济发展的重中之重,据统计,目前为止我国石油和化工行业的资产总额已近3.8万亿元,2007年1~8月份全行业利税总额5200多亿元,利润总额3550多亿元.随着我国经济向市场化转轨,以及市场全球化和社会信息化的发展,要求大型石油和化工企业增强其技术、经济和管理能力,能迅速对市场需求做出响应,提高竞争能力和经营效率.而自动化技术正是石油和化工企业提高生产效率和竞争力的重要手段.中国石油和化工自动化应用协会正是以提高石油和化学工业自动化、信息化技术装备水平及应用管理水平,促进石油和化学工业的技术进步为己任,此次,本刊记者专门采访了中国石油和化工自动化应用协会秘书长陈明海.…… 相似文献
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据有关部门统计,目前全国已注册的电子商务网站有1100多家,涉及石油和化工业务的专业电子商务网站有几十家。这是7月8日在北京举行的中国石油和化工电子商务高层研讨会暨中化贸易网开通仪式上透露的。会议就我国石油和化工电子商务的发展现状、存在问题和未来走势等进行了研讨。据国家石化工业局党组成员、中纪委驻国家石化局纪检组组长阎家铭介绍,石油和化学工业是我国的支柱产业,行业多、门类全,有4万多种产品。中国的石油、石化和化工产业在中国国民经济中大约占1/5的比重,是国内经济效益最好的行业之一。今年又提前半年完成了全年的利润指标。去年,全国石油、石化和化工产品进出口贸易额近400亿美元,在世界化工产品贸易中也占有相当比重。在未来几年,化工类电子商务将在全球电子商务中名列前茅。到2003年,全球将有超过1万亿美元的化工商品在网上交易。而目前 相似文献
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3月29日~30日,中国石油和化学工业协会、国家统计局在京联合召开了“2006年中国石油和化工经济形势高层论坛暨中国石油和化工百强企业峰会”,全国人大常委会副委员长顾秀莲出席会议并致辞。会议总结和回顾了“十五”期间石油和化工的经济形势,分析了石油和化工行业的未来发展趋势,同时公布并表彰了2005年度中国石油和化工百强企业。国家发改委、国家统计局等部门领导、行业专家、专业协会以及百强企业领导出席了会议,并做了重要讲话。走新型工业化道路顾秀莲副委员长在致辞中高度赞扬了石油和化工企业百强活动。在谈到石油和化工行业未来发… 相似文献
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石油化工是国民经济的支柱产业,产品广泛应用于工业生产、交通运输、人民生活、国防科技等国民经济各个领域;石油化工也是原材料加工工业,对资源依赖程度高,资金技术密集,规模经济效益显著。石油和化学工业大发展对促进相关产业升级和拉动经济增长具有举足轻重的作用。节能减排任务仍艰巨然而,全球能源危机和环境污染的到来,将原本发展得顺风顺水的石化行业推入了有些尴尬的境地。 相似文献
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《自动化技术与应用》2009,(10):138-138
深圳市库马克新技术股份有限公司(以下简称深圳库马克)是一家在电气节能和自动化及其相关领域从事技术和工程服务的深圳市高新技术企业,在有色金属、钢铁、石油、化工、煤炭、电力、环保、制药、食品、烟草、机械、市政等各种行业,在过程自动化、工厂自动化、电力系统综合自动化等领域为客户提供整套专业化解决方案。 相似文献
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《Computer Physics Communications》1985,37(1-3):251-260
Certain problems lend themselves admirably to SIMD architecture computers. A number of such problems in physics will be discussed and their implementation on the ICL DAP analyzed. Monte Carlo (MC) problems such as the 3-D Ising model and quantum chromodynamics (QCD) calculations need care and attention with respect to maintaining detailed balance on a SIMD architecture, whereas molecular dynamics (MD) problems do not pose such problems. The efficient use of a DAP requires the development of parallel algorithms designed to make use of the particular architecture and size of the machine, though further software developments must be made which remove the user one stage farther from the particular details of the computer. Experience on the DAP, especially those with only 2 Mbytes of store such as the Edinburgh DAPs, has led to thought about the detailed precisions necessary for the various calculations being done—many computers operate at an accuracy which is in excess of requirement whereas the bit-serial DAP can have its program finely tuned in accuracy.The present DAPs are far from the modern state of the art in fabrication, and future engines of similar design could be made with present technology with a rating well over a Gflop, providing very cost-effective computing. 相似文献
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A. M. Andrew 《控制论与系统》2013,44(3):61-72
A central theme of both Cybernetics and Systems Research has been the study of complex, richly-interconnected systems, particularly those having properties of self-organization. Although social and economic systems are frequently mentioned in the literature, the systems which have been studied most have been the nervous system and artificial systems of neuron-like elements. 相似文献
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张弛 《数码设计:surface》2010,(3):136-137
摄影的视觉语言在摄影师独特的艺术情感下,形成运动的感受,重复的形状、斑斓的色彩,丰富的情感。艺术设计的表现语言同样是设计师将形状、色彩、构成富于了情感,运用视觉语法规则传递着运动、节奏、韵律的美感。这种情感在艺术设计创作过程中是表现的重点,通过摄影的练习把握好人类对设计元素的微妙情感,可以创造出富有灵性的艺术设计品。 相似文献
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Khurshid M. Kiani 《Computational Economics》2011,37(2):193-220
In this study, a highly flexible form of nonlinear time series models called artificial neural networks (ANNs) are employed
to predict fluctuations in economic activity in selected members (Armenia, Azerbaijan, Georgia, Kazakhstan, and Kyrgyzstan)
of the Commonwealth of Independent States (CIS) using macroeconomic time series [treasury bill rate (T-bill), long term bond
rate (BondLT), money supply (MS), industrial production (IP), spread (10-year treasury bond rate less 3-month treasury bill
rate), BRTB (bank rate less 3-month treasury bill rate), and GDP growth rate]. Forecasting recessions being very important
though challenging, recessions in the selected countries are modeled recursively 1–10 quarters ahead out-of-sample using ANNs
in conjunction with macroeconomic time series for all the countries. The out-of-sample forecast results show that in general
no single macroeconomic variable employed appears to be useful for predicting recessions in any of the series. However, for
Armenia, the treasury bill rate, industrial production, money supply, and the spread (the yield curve) are candidate variables
for predicting recessions 1–10 quarters ahead. For Georgia, Kazakhstan, and Kyrgyzstan, the treasury bill rate and money supply
series are candidate variables for predicting recessions 1–10 quarters ahead. 相似文献
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Based on the data from the Ozone Monitoring Instrument (OMI; Aura) satellite instrument, an analysis of changes in total formaldehyde (CH2O) column and tropospheric nitrogen dioxide (NO2) column, associated with the extreme summer weather regimes and wildfires in European Russia (ER) in 2010 and Western Siberia (WS) in 2012, was carried out. In both territories, over the clusters of intense fires, an approximately two-fold increase in CH2O content and a 20% increase in NO2 content were observed. Unlike NO2, the changes in the CH2O content over ER and WS also reveal positive correlation with the regional surface temperature. 相似文献
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《Ergonomics》2012,55(5):375-386
Sex-related differences in heat balance and transfer were studied in nine female and ten male heat-acclimatized subjects exposed to two hot-dry (HD) conditions(49°C, 20% rh; 54°C, 10% rh) and three hot-wet (H W) conditions (32°C, 80% rh; 35°C, 90% rh; 37°C, 80%rh). Exposures lasted 120min: l0min rest, 50min walk, l0min rest, 50min walk. Walking speed was 1 34 ms-1 (level), and for 49°C, 20% rh, in addition, 1-34ms-l, 5% grade. No sex-related differences were found in metabolic heat production (M), nor in heat exchange by radiation and convection (R + C)or evaporation (E), when expressed per unit body weight (wt). However, E per unit body surface area (A D) was lower in females by 9–13% (P<0 05 in all HD conditions and for the 32°C, 80% rh condition) due to their lower M/A D, and 4-6% lower (R + C)/A D in HD. Core-to-periphery heat conductance was similar in both sexes despite a lower core-to-skin temperature gradient for women in HD. It was suggested that women have an advantage over men in heat transfer particularly in HW because of their higher A D/wt. The disadvantage of a high A D/wt at high HD environmental temperatures is diminished by a higher skin temperature, thus reducing (R + C) heat gain. The net effect is to require lower evaporative cooling for women in both HW and HD environments. 相似文献
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We address the problem of detecting irregularities in visual data, e.g., detecting suspicious behaviors in video sequences,
or identifying salient patterns in images. The term “irregular” depends on the context in which the “regular” or “valid” are
defined. Yet, it is not realistic to expect explicit definition of all possible valid configurations for a given context.
We pose the problem of determining the validity of visual data as a process of constructing a puzzle: We try to compose a
new observed image region or a new video segment (“the query”) using chunks of data (“pieces of puzzle”) extracted from previous
visual examples (“the database”). Regions in the observed data which can be composed using large contiguous chunks of data
from the database are considered very likely, whereas regions in the observed data which cannot be composed from the database
(or can be composed, but only using small fragmented pieces) are regarded as unlikely/suspicious. The problem is posed as
an inference process in a probabilistic graphical model. We show applications of this approach to identifying saliency in
images and video, for detecting suspicious behaviors and for automatic visual inspection for quality assurance.
Patent Pending 相似文献
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《Ergonomics》2012,55(10):1130-1147
In Central Europe, the influence of transformation on science and practice in both ergonomics and occupational safety has been positive. The opening of markets has automatically resulted in the quality of products of various countries being compared. The comparison of the state of science has been equally revealing. The spontaneous willingness of leading world centres to co-operate in both occupational safety and ergonomics has resulted in positive changes, e.g. intensive work on creating the instruments for: implementing ILO conventions and EU directives into national laws; implementing international and European standards into national standards; accrediting testing laboratories in the field of occupational safety and ergonomics; accrediting centres for product certification for the safety mark (obligatory) and for conformity with ergonomic parameters (voluntary); and computer-aided designing and creating databases in occupational safety and ergonomics conforming to international standards. These are the laws of the emerging common market for products and services. There is still a much more difficult area of necessary changes in the approach to: the value of life and health; the belief in the possibilities and the effectiveness of initiatives towards changing the working and life environment; and the form and content of the information in occupational safety and ergonomics taught from school to adult education. Transformation has led to a renaissance in which man has become the subject of all aspects of life and activity. There is also a renaissance of occupational safety and ergonomics. The fields of research that have gained importance in this new approach in Central Europe are discussed. 相似文献