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2010 International Conference on Challenges in Environmental Science and Computer Engineering最新文献

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Shunt Active Power Filter and Its Application 并联有源电力滤波器及其应用
Jie Zhao, Wenjin Dai, Kai Wang
With the extensive application of high-power switching devices, the quality of electric power is growing problem seriously, which causes the current (voltage) distortion, producing a large number of harmonics. This paper introduces the principle, structure, device development and the characteristics of active filter, and its application in power system applications. Currently, The key is to further enhance the application of levels of active filter in the production practice, and to promote scientific research transfer into Industrial Molded Products quickly.
随着大功率开关器件的广泛应用,电能质量问题日益严重,导致电流(电压)畸变,产生大量谐波。本文介绍了有源滤波器的原理、结构、器件研制和特点,以及有源滤波器在电力系统中的应用。目前,关键是进一步提高有源滤波器在生产实践中的应用水平,推动科研成果迅速转化为工业模塑制品。
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引用次数: 3
Study on the Problems and Their Mechanisms of Water Environment in Xinjiang 新疆水环境问题及其机理研究
Zhang Zhong-wu, Yang Degang, Zhang Yueqin
This paper analyzes the problems and trends of water environment and mechanisms of the problems by Ridit Analysis and other qualitative and quantitative analysis methods with water monitoring data and economical data in Xinjiang in 2001-2006. The results show: (1)water qualities of rivers of Xinjiang are slightly pollution and that of Northern is more serious than that of southern in Xinjiang, and water qualities of rivers far from urban are better than those across urban. The trend of water quality change of river is stable in 2001-2006. (2) Water qualities of lakes and reservoirs are middle level pollution, and water quality of lakes is better than that of reservoirs. The trend of water quality change of lakes and reservoirs are stable. (3) Water qualities of drinking-water source are good totally and its trend of changes is stable. Quality of groundwater of Urumqi city is badly, and its trend of changes is stable. The main reasons leading to water environment problems are: (1) industrial structure are heavy that cause larger pollution water.(2) Economy of Xinjiang is in the Stage of rapid developing that requires excess water. (3)Urban infrastructure is weak. (4) Pollution of rural is heavy, and (5) protractions of drinking-water source is not well.
本文利用2001-2006年新疆水资源监测资料和经济资料,采用Ridit分析法等定性和定量分析方法,分析了新疆水环境存在的问题、发展趋势及其机理。结果表明:(1)新疆河流水质污染程度较轻,北部较南部严重,远离城市的河流水质好于跨城市的河流。2001-2006年河流水质变化趋势稳定。(2)湖泊、水库水质为中度污染,湖泊水质好于水库。湖泊、水库水质变化趋势稳定。(3)饮用水源水质总体良好,变化趋势稳定。乌鲁木齐市地下水水质较差,变化趋势稳定。造成水环境问题的主要原因是:(1)产业结构偏重,对水的污染较大;(2)新疆经济处于快速发展阶段,对水的需求过大。(3)城市基础设施薄弱。(4)农村污染严重;(5)饮用水源延续性不佳。
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引用次数: 1
Test on EM Bacteria Applied in Treating Landscape Water EM细菌在景观水处理中的应用试验
Weiping Wang, Pin Liu, Peipei Zhang, Haiwei Zhang
Taking domestic sewage as the research object, through adding different amount of EM bacteria culture medium to the sewage and EM rejuvenation bacteria which cultivated by combining immobilization technology, wastewater treatment mechanism of EM bacteria was explored, and the treatment effect of COD, ammonia nitrogen and total phophorus was observed as well as the best collecting volume. The results showed that EM rejuvenation bacteria is better than pure EM culture medium on the removal rate of ammonia nitrogen, total phosphorus and COD in wastewater, furthermore removal efficiency by 35 mesh rejuvenation bacteria is higher than 120 mesh.
以生活污水为研究对象,通过在污水中加入不同量的EM细菌培养基,结合固定化技术培养出EM再生细菌,探索EM细菌对废水的处理机理,观察其对COD、氨氮和总磷的处理效果以及最佳集成量。结果表明,EM再生细菌对废水中氨氮、总磷和COD的去除率优于纯EM培养基,且35目再生细菌对废水的去除率高于120目。
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引用次数: 0
Bioethanol Production Based on Simultaneous Saccharification and Fermentation of Wheat Straw 麦秸糖化发酵生产生物乙醇的研究
Peng Luo, Zhong Liu
The potential of wheat straw as raw materials for ethanol production was investigated. Ethanol cooking at 190 ¿ for 60 min was adopted as pretreatment method for dilute sulfuric acid impregnated wheat straw. The pretreated wheat straw was used as substrate for the production of ethanol by simultaneous saccharification and fermentation (SSF) through orthogonal experiment design in the present study. The in¿uence of different parameters in SSF, such as reaction temperature, substrate concentration, initial medium pH and enzyme concentration, on the ethanol concentration and yield was investigated and the SSF conditions were optimized. The ranking, from high to low, of influential extent of the SSF affecting factors to ethanol concentration and yield was substrate concentration, enzyme loading, initial fermentation liquid pH value, reaction temperature, orderly. The optimum SSF condition was 35¿ for reaction temperature, 100 gl-1 for substrate concentration, 5.0 for initial fermentation liquid pH value, 30 FPUg-1 for enzyme loading. Under the optimum SSF condition, 23.1 gl-1 of the ethanol concentration and 68.2% of the ethanol yield were obtained respectively after 72 h.
研究了麦秸作为乙醇生产原料的潜力。采用190℃乙醇蒸煮60 min的预处理方法对稀硫酸浸渍麦秸进行预处理。本研究以预处理后的麦秸为底物,通过正交试验设计,采用同步糖化发酵法生产乙醇。考察了反应温度、底物浓度、初始培养基pH和酶浓度等参数对乙醇浓度和产率的影响,并优化了反应条件。SSF影响因素对乙醇浓度和产率的影响程度由高到低依次为底物浓度、酶载量、发酵液初始pH值、反应温度。SSF的最佳条件为反应温度35℃,底物浓度100 gl-1,发酵液初始pH值5.0,酶载量30 fug -1。在最佳SSF条件下,72 h后乙醇浓度为23.1 g / 1,乙醇收率为68.2%。
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引用次数: 4
Constructing Integrated Solution for Performance Management with Office PerformancePoint Server 2007 利用officeperformancepoint Server 2007构建绩效管理集成解决方案
Zhijun Ren
This paper describes PerformancePoint Server, discusses its three capabilities for performance management, and finally, gives out integrated solution for performance management with Office PerformancePoint Server 2007.
本文介绍了PerformancePoint Server,讨论了它的三种性能管理功能,最后给出了与Office PerformancePoint Server 2007集成的性能管理解决方案。
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引用次数: 0
Progress in Water Quality Monitoring Based on Remote Sensing and GIS 基于遥感和GIS的水质监测研究进展
Fengyun Mu
This paper reviews the progress of the application of RS and GIS integration technology and the design of integration system in water quality monitoring domain. Key aspects of available remote sensing techniques and the present application domain of water quality monitoring by remote sensing applications are briefly summarized. Special attention has been focused on the main principles of using remote sensing to monitor water quality, and the main retrieved algorithms and available sataellite data sources. Recent advances are examined and limitations of water environment remote sensing and the future research prospect are discussed.
本文综述了RS与GIS集成技术在水质监测领域的应用进展及集成系统的设计。简要总结了现有遥感技术的关键方面和目前遥感水质监测的应用领域。特别注意了利用遥感监测水质的主要原则,以及检索到的主要算法和现有的卫星数据源。综述了水环境遥感研究的最新进展,讨论了水环境遥感的局限性和未来的研究前景。
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引用次数: 3
Utilization of Wheat Straw in Manufacture of Particleboard 麦秸在刨花板生产中的应用
Peng Luo, C. Yang
Wheat straw is one of the most abundant and cheap agricultural wastes, and it is estimated that about 250 million tons are produced annually in China. Wheat straw is predominantly disposed of by direct burning in open field due to lack of e¿ective utilization, which also causes serious environmental pollution. It is an important issue to deal with the agricultural waste both for the comprehensive utilization of lignocellulosic resources and for the prevention of environmental pollution. The aim of the present work was to investigate the suitability of wheat straw as a raw material for particleboard. In this study, phenol–formaldehyde resin was modified with polyisocyanate as an adhesive for wheat straw particleboard preparation. Orthogonal experiment design was used to study the effects of hot-press temperature, hot-press time, resin application ratio, and wax application ratio on mechanical and water soaking properties of the wheat straw particleboard. Results showed that hot-press temperature was the dominant in¿uencing factor. Mechanical and soaking properties improved as hot-press temperature increased and reached their highest point at 160¿. Hot-press time, resin application ratio, and wax application ratio also had a significant effect on mechanical and water soaking properties of the board. The optimum manufacture condition was 160¿ for hot-press temperature, 6 min for hot-press time, 20% for resin application ratio, 0.7% for wax application ratio. Under the optimum condition, 11.9 Mpa of the modulus of rupture, 0.30 Mpa of the internal bond and 4.8% of the thickness swell were obtained, higher than the requirement of JIS A 5908.
麦秸是最丰富、最廉价的农业废弃物之一,据估计,中国每年生产约2.5亿吨麦秸。麦秸主要采用露天焚烧的方式处理,缺乏有效利用,造成严重的环境污染。农业废弃物的处理是综合利用木质纤维素资源和防止环境污染的重要课题。本研究的目的是研究麦秸作为刨花板原料的适用性。以聚异氰酸酯为粘合剂,对酚醛树脂进行改性,制备麦草刨花板。采用正交试验设计,研究了热压温度、热压时间、树脂用量、蜡用量对麦草刨花板力学性能和浸水性能的影响。结果表明,热压温度是主要的影响因素。机械性能和浸泡性能随着热压温度的升高而改善,并在160℃时达到最高点。热压时间、树脂用量和蜡用量对板材的力学性能和浸水性能也有显著影响。最佳工艺条件为热压温度160℃,热压时间6 min,树脂用量20%,蜡用量0.7%。在最佳条件下,试件的断裂模量为11.9 Mpa,内部粘结强度为0.30 Mpa,厚度膨胀率为4.8%,均高于JIS A 5908的要求。
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引用次数: 1
Research of Accurate Software Timing Based on Windows 基于Windows的软件精确定时研究
Fengjuan Cheng, Hui Yin, Qing-hui Zhang, De-xian Zhang
Several types of highly accurate software and hardware timing methods provided by Windows system are introduced. The implement of every method is discussed in detail. In addition, combing their application, the programme instances are offered.
介绍了Windows系统提供的几种高精度软硬件定时方法。详细讨论了各种方法的实现。并结合其应用,给出了方案实例。
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引用次数: 0
A Web-Based Environmental Education Mode 基于网络的环境教育模式
Zhong Yexi
The goal of the environmental education should not merely train students' environmental knowledge, the more important thing is that it trains students' environmental morals and forms the behavior which is favorable to the environment, and these can only be formed by practice in real life. In the traditional teaching model of practice, one teacher can only guide one practice at the same time. With the development of network technology, teacher can guide the different practice activities starting up in different locations or in different times by network. Based on the integration of practical need and interactive characteristics of environment education, the author put forward a web-based environment education mode named “practice-interactive- participate in”. The Core of this mode is to train students’ environmental morals by practice and to realize teachers’ instruction through network. It also integrated the practical demand of environmental education and interactive characteristic of network teaching. This mode of teaching includes three parts: "Walk close to the nature --The cognitive education of environment ", “Experience the nature --Attitude and affective education ", “Protect the nature --The education of environmental behavior".
环境教育的目标不应仅仅是培养学生的环境知识,更重要的是培养学生的环境道德,形成有利于环境的行为,而这些只有在现实生活的实践中才能形成。在传统的实践教学模式中,一名教师只能同时指导一项实践。随着网络技术的发展,教师可以通过网络指导在不同地点、不同时间开展的不同实践活动。结合环境教育的实践需要和互动性特点,提出了“实践-互动-参与”的网络环境教育模式。这种模式的核心是通过实践培养学生的环境道德,通过网络实现教师的指导。它结合了环境教育的实际需求和网络教学的互动性特点。该教学模式包括“亲近自然——环境认知教育”、“体验自然——态度与情感教育”、“保护自然——环境行为教育”三个部分。
{"title":"A Web-Based Environmental Education Mode","authors":"Zhong Yexi","doi":"10.1109/CESCE.2010.82","DOIUrl":"https://doi.org/10.1109/CESCE.2010.82","url":null,"abstract":"The goal of the environmental education should not merely train students' environmental knowledge, the more important thing is that it trains students' environmental morals and forms the behavior which is favorable to the environment, and these can only be formed by practice in real life. In the traditional teaching model of practice, one teacher can only guide one practice at the same time. With the development of network technology, teacher can guide the different practice activities starting up in different locations or in different times by network. Based on the integration of practical need and interactive characteristics of environment education, the author put forward a web-based environment education mode named “practice-interactive- participate in”. The Core of this mode is to train students’ environmental morals by practice and to realize teachers’ instruction through network. It also integrated the practical demand of environmental education and interactive characteristic of network teaching. This mode of teaching includes three parts: \"Walk close to the nature --The cognitive education of environment \", “Experience the nature --Attitude and affective education \", “Protect the nature --The education of environmental behavior\".","PeriodicalId":6371,"journal":{"name":"2010 International Conference on Challenges in Environmental Science and Computer Engineering","volume":"55 1","pages":"174-177"},"PeriodicalIF":0.0,"publicationDate":"2010-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78718830","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
The Trihalomethanes Formation in Water Distribution Systems: The Laboratory Analog Experiments and Analysis 配水系统中三卤甲烷的形成:实验室模拟实验与分析
L. Mou, L. Hongyan, Wang Menglin
Chlorination of drinking water leads to the formation of trihalomethanes (THMs) that has been proved have adverse health effects on humans. Research on this subject has been continued and new epidemiological and toxicological studies have been conducted. In this paper, authors investigate and analyze factors affecting THMs formation in pipe networks by conducting corresponding experiments on a close small-scale water supply system in lab. The main factors affecting THMs formation such as chlorine and humic acid concentration was measured and controlled in the system for identifying their effects. According the experiment results, solutions of minimizing the amounts of THMs in municipal distribution systems are posted.
饮用水的氯化处理导致三卤甲烷(THMs)的形成,这已被证明对人类健康有不利影响。关于这个问题的研究一直在继续,并进行了新的流行病学和毒理学研究。本文通过近距离小型供水系统的室内实验,对管网中THMs形成的影响因素进行了研究和分析。在系统中对影响THMs形成的主要因素如氯和腐植酸浓度进行了测量和控制,以确定其影响。根据实验结果,提出了市政配电系统中thm数量最少的解决方案。
{"title":"The Trihalomethanes Formation in Water Distribution Systems: The Laboratory Analog Experiments and Analysis","authors":"L. Mou, L. Hongyan, Wang Menglin","doi":"10.1109/CESCE.2010.205","DOIUrl":"https://doi.org/10.1109/CESCE.2010.205","url":null,"abstract":"Chlorination of drinking water leads to the formation of trihalomethanes (THMs) that has been proved have adverse health effects on humans. Research on this subject has been continued and new epidemiological and toxicological studies have been conducted. In this paper, authors investigate and analyze factors affecting THMs formation in pipe networks by conducting corresponding experiments on a close small-scale water supply system in lab. The main factors affecting THMs formation such as chlorine and humic acid concentration was measured and controlled in the system for identifying their effects. According the experiment results, solutions of minimizing the amounts of THMs in municipal distribution systems are posted.","PeriodicalId":6371,"journal":{"name":"2010 International Conference on Challenges in Environmental Science and Computer Engineering","volume":"47 1","pages":"88-91"},"PeriodicalIF":0.0,"publicationDate":"2010-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86011241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
期刊
2010 International Conference on Challenges in Environmental Science and Computer Engineering
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