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提高采收率化学剂评价标准发展概述探析
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作者 昝晶鸽 王远征 +3 位作者 沙宗伦 孙海童 屈鸣 杨二龙 《油田化学》 CAS CSCD 北大核心 2024年第3期563-570,共8页
提高采收率化学剂在提高油田产量和挖潜残余油资源发挥着关键作用,然而其有效性和可靠性取决于一系列技术和质量标准。文章重点关注国内外提高采收率化学剂评价标准的发展动态和编制历程,总结了国内外提高采收率化学剂现行标准的特点,... 提高采收率化学剂在提高油田产量和挖潜残余油资源发挥着关键作用,然而其有效性和可靠性取决于一系列技术和质量标准。文章重点关注国内外提高采收率化学剂评价标准的发展动态和编制历程,总结了国内外提高采收率化学剂现行标准的特点,对该类化学剂的特征进行了探析并提出了未来发展趋势和评价标准的建议,旨在为提高采收率所使用的化学剂的标准发展方向提供参考和依据,以满足不断变化的行业需求。通过对该类化学剂的质量和性能标准化,可确保其在油田现场的有效应用,从而提高油田产能,并减少潜在的环境和经济风险。在不断演进的油气行业中,标准化将继续发挥关键作用,为行业的可持续发展提供支持和指导。 展开更多
关键词 油田 提高石油采收率 油田化学剂 标准和质量 评价标准发展趋势 综述
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矿业可持续发展能力及其评价
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作者 彭秀平 《矿业工程》 CAS 2004年第4期8-10,共3页
矿业可持续发展能力是矿业系统达到可持续发展既定目标的能力 ,进行可持续发展能力评价 ,不但要评价其时点状态 ,更要评价其变化趋势。矿业可持续发展能力的状态评价可采用模糊综合评判法 ,而趋势评价可通过建立多维时间序列模型来进行。
关键词 矿业 可持续发展能力 发展趋势评价 多维时间序列
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全球背景下学前教育质量评价与发展路径 被引量:12
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作者 秦金亮 《浙江师范大学学报(社会科学版)》 北大核心 2017年第2期1-9,共9页
全球学前教育质量变革的动力源于人们对高质量学前教育在改变人生命运、坚守社会正义等方面有说服力研究的醒悟。通过评价来把握、提升、改进学前教育质量已形成条件性、结果性、过程性、使能性四种评价路径,它们适用于质量评价的不同阶... 全球学前教育质量变革的动力源于人们对高质量学前教育在改变人生命运、坚守社会正义等方面有说服力研究的醒悟。通过评价来把握、提升、改进学前教育质量已形成条件性、结果性、过程性、使能性四种评价路径,它们适用于质量评价的不同阶段,各有其独特价值。发达国家促进学前教育质量提升已开始充分使用不同评价工具,实现评价多元共存、优势互补的整合效应。我国在学前教育普及中应重视有质量的普及,形成能调动多方积极性的有国际领先水平的质量评价体系。 展开更多
关键词 学前教育质量 全球质量变革 评价发展趋势 使能性评价
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基于尖点突变分析和变形预测的基坑沉降稳定性
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作者 王铭 郭豪 +3 位作者 胡光辉 张壮 杜金亮 刘塬熙 《黑龙江科技大学学报》 CAS 2023年第6期889-895,共7页
为准确掌握基坑沉降稳定性,以尖点突变分析构建基坑沉降稳定性的现有评价模型,通过集对分析组合预测方法构建基坑沉降稳定性的发展趋势评价模型,结合两者结果综合评价基坑沉降稳定性。结果表明:经基坑沉降稳定性的现状评价,各监测点的... 为准确掌握基坑沉降稳定性,以尖点突变分析构建基坑沉降稳定性的现有评价模型,通过集对分析组合预测方法构建基坑沉降稳定性的发展趋势评价模型,结合两者结果综合评价基坑沉降稳定性。结果表明:经基坑沉降稳定性的现状评价,各监测点的突变特征值均大于0,说明在现状条件下,基坑沉降整体处于稳定状态;经基坑沉降稳定性的发展趋势评价,得出各监测点外推预测速率较现状速率呈减小趋势,基坑后续的沉降稳定性趋于增加;结合基坑现状稳定性结果和发展趋势结果,综合得出基坑沉降稳定性目前处于稳定状态,且后期趋于增加。 展开更多
关键词 基坑 沉降稳定性 现状评价 组合预测 发展趋势评价
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Study Progress and Trends of Strategic Environmental Assessment in China
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作者 Cai Chunmiao1,2, 3, Shang Jincheng4 1. Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun Jilin 130012, China 2. Department of Geography, Harbin University, Harbin Heilongjiang 150086, China +1 位作者 3. Graduate School of Chinese Academy of Sciences, Beijing 100039, China 4. College of Urban and Environmental Science, Northeast Normal University, Changchun Jilin 130024, China 《Chinese Journal of Population,Resources and Environment》 2009年第2期76-82,共7页
Strategic environmental assessment (SEA) in China has developed rapidly since it was introduced into China in the 1990s. Chinese government promulgated the Environmental Impact Assessment Law of China (hereinafter ref... Strategic environmental assessment (SEA) in China has developed rapidly since it was introduced into China in the 1990s. Chinese government promulgated the Environmental Impact Assessment Law of China (hereinafter referred to as the EIA Law) in 2002. In this law, it is stipulated clearly that regional and sector plans should be assessed. Through investigating materials and analyzing literatures, this article analyses the practical and academic study achievements of SEA in China that have been achieved since the EIA Law was implemented, probes into the current situation of the main level of SEA in China-plan EIA, then summarizes the development characteristics, and eventually, puts forward the development trends of SEA in China. The research conclusions can offer the foundations for comprehending systematically the progress of SEA in China. 展开更多
关键词 strategic environmental assessment plan environmental impact assessment China study progress CHARACTERISTICS development trends
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Research Status and Development Trend on the Physiological Comfort of Swimwear
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作者 XU Chunjie SONG Xiaoxia 《International English Education Research》 2015年第10期75-77,共3页
The classification of the swimwear, the development of the swimwear and market situation were introduced. The main factors affecting the physiological comfort and the research status were presented. With the combinati... The classification of the swimwear, the development of the swimwear and market situation were introduced. The main factors affecting the physiological comfort and the research status were presented. With the combination of objective and subjective evaluation methods, it is pointed out that on the physical comfort the research of wet swimwear is one of the development trends. 展开更多
关键词 swimwear COMFORT SWIMMING clothing pressure
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Development Trends and Evaluation of Egbe Reservoir Water Nutrient Status in Ekiti State, Nigeria
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作者 Josephine Bolaji Edward Adiaha Aldah Alex Ugwumba 《Journal of Life Sciences》 2010年第1期7-16,共10页
A study about some physicochemical parameters of Egbe reservoir was carried out from September 2005 to December 2006. The parameters include mean temperature, pH, conductivity, alkalinity, TSS, TDS, DO and BOD which h... A study about some physicochemical parameters of Egbe reservoir was carried out from September 2005 to December 2006. The parameters include mean temperature, pH, conductivity, alkalinity, TSS, TDS, DO and BOD which have values of 28.7±0.9 ℃ ; 8.3±0.3; 831±172.5 μS/cm; 165.4±18.3 mg/L; 0.06±0.1 mg/L; 0.4±0.6 mg/L; 7.8±2.4 mg/L and 5.2±1.6mg/L, respectively. Temperature and pH were measured in the field using mercury-in-glass thermometer calibrated in degrees Celsius and pH meter, respectively. TSS and TDS were measured by grayimetric methods, while alkalinity was measured titrimetrically and DO and BOD were measured by Winkler's method. For the nutrients, nitrate was measured color±metrically, phosphate by Stannous Chloride method and sulphate by turbidimetric method. Mean concentration of nitrate, phosphate, and sulphate were 15.6±8.6 rag/L; 42.5±19.4 mg/L and 72.3±14.7 mg/L respectively. Nowadays, eutrophication of natural waters is one of the most significant causes of deterioration of water quality, and nitrates and phosphates are probably the key nutrients in controlling the growth of aquatic plants. Though the mean concentration of nitrates and phosphates in the reservoir water were within the acceptable limit, yet their concentrations in some locations of reservoir were high enough to encourage the growth of aquatic macrophytes which would increase productivities. Hence, it is necessary to check their further increase, and periodic monitoring and preventive measures must be adopted to save the reservoir from eutrophication. 展开更多
关键词 Physico-chemical parameters development trends NUTRIENTS Egbe reservoir.
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