Kinetics study on biomass pyrolysis for fuel gas production     

陈冠益  方梦祥  ANDRIES J  骆仲泱  SPLIETHOFF H  岑可法 《浙江大学学报(A卷英文版)》2003,4(4):441-447

Kinetic knowledge is of great importance in achieving good control of the pyrolysis and gasification process and optimising system design. An overall kinetic pyrolysis scheme is therefore addressed here. The kinetic modelling incorporates the following basic steps: the degradation of the virgin biomass materials into primary products (tar, gas and semi-char), the decomposition of primary tar into secondary products and the continuous interaction between primary gas and char. The last step is disregarded completely by models in the literature. Analysis and comparison of predicted results from different kinetic schemes and experimental data on our fixed bed pyrolyser yielded very positive evidence to support our kinetic scheme. Project (No. 2001CB409600) Supported by the National Key Basic Research Program (973) of China  相似文献   

日美课程改革的比较分析——美国学者谈日本教育改革     

V·J·詹妮西克  费学勤 《天津市教科院学报》1995,(5)

二战后受美国的影响,日本现行的课程模式是在美国初、中等教育课程结构的基础之上建立起来的。但是,日本课程结构的核心精华却有着丰富悠久的历史。它具有强烈的美学意识和热爱大自然的传统观念,并受到诸如日本神道教、佛教、孔子之道等各种不同道教思想的影响。如今人们访问日本学校不难发现这些特点随处可见。只有通过对这些方面的了解,人们才有可能较详尽地理解日本的教育改革。目前在任何一个国家都明显地表现出经济、社会、文化和政治对课程结构所产生的影响。在日本由于课程编制是由中央集权直接控制的,因而更加容易看到这些影响。  相似文献   

四元教学设计模式主要设计原理     

杰伦·J.G.范梅里恩伯尔  盛群力 《开放教育研究》2020,(3):35-43

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Kinetics study on biomass pyrolysis for fuel gas production   总被引：1，自引：0，他引：1  

陈冠益  ANDRIES  J.  方梦祥  骆仲泱  SPLIETHOFF  H  岑可法 《Journal of Zhejiang University. Science. B》2003,(4)

INTRODUCTIONSincebiomassisanabundant,inexpensiveandrenewableresource ,itsconversiontosyn theticfuelsandchemicalproductsappearsat tractive.Amongallkindsofbiomassconversionroutes,pyrolysisisbeinggivenincreasingatten tionsincetheprocessissimpleandmaybeopti m…  相似文献   

The Needs-Based Assessment of Parental (Guardian) Support: a test of its validity and reliability     

Bolen RM  Leah Lamb J  Gradante J 《Child abuse & neglect》2002,26(10):1081-1099

OBJECTIVE: The purpose of this paper is to present a newly developed measure of guardian support, the Needs-Based Assessment of Parental (Guardian) Support (NAPS), an empirical evaluation of that measure, and its comparison with another measure of guardian support. The theoretical model that underlies this measure applies humanistic theory and Maslow's hierarchy of needs to the understanding of guardian support. METHOD: The study employed a cross-sectional nonexperimental survey design using 183 nonoffending guardians who accompanied children presenting for a medical/forensic examination for sexual abuse. The NAPS and an existing measure of guardian support were administered during the hospital outpatient visit, and basic information concerning the child and abuse situations were gathered. RESULTS: The NAPS had robust psychometric properties and was culturally sensitive. Tests of specific hypotheses supported the construct validity of the measure and a conceptualization of guardian support as hierarchical, with four stages of support. CONCLUSIONS: The brevity and ease of administration of the NAPS for both the clinician and guardian suggest that it is a viable assessment tool. The strong support for the NAPS' underlying theoretical model suggests that the nonoffending guardians' available resources need to be considered when assessing guardian support.  相似文献   

Beecham backs out of spina bifida trial     

Bryan J 《New scientist (1971)》1982,96(1336):709

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为什么温泉的水是热的?     

企鹅老博士 《孩子天地》2003,(11)

企鹅老博士: 寒假里,爸爸带我去龙脉温泉游泳。我问爸爸温泉为什么会热?爸爸也不大明白。他说:“你不是订阅《孩子天地》了吗?向老博士请教吧。”我希望您能告诉我。北京市南海淀小学三(2)班柳云琪  相似文献   

The relationship between instructional and assessment accommodations in an inclusive state accountability system     

Ysseldyke J  Thurlow M  Bielinski J  House A  Moody M  Haigh J 《Journal of learning disabilities》2001,34(3):212-220

We investigated the kinds of instructional and assessment accommodations students with disabilities receive, and the extent to which instructional accommodations match assessment accommodations. Most students who had IEPs in specific content areas received instructional accommodations in those areas, and there were no differences by disability type. We provide data on the specific types of accommodations used. Overall, students' assessment accommodations matched their instructional accommodations, though many students received testing accommodations that had not been received in instruction. Implications are discussed for IEP teams who make decisions about instructional and assessment accommodations.  相似文献   

BIM在建设工程项目中的创新价值初探     

刘慧  王孟钧  Miroslaw J. Skibniewski  郑俊巍 《科技管理研究》2016,(8):194-200

对BIM国际前沿文献进行跟踪研究,梳理BIM在建设工程项目中的主要应用模式。在分析建设工程创新特性的基础上,指出BIM为建设工程项目各参与组织构建了合作创新的工作环境。依据建设工程创新类别,分析BIM应用模式的创新定位,探索BIM在建设工程创新中的价值。  相似文献   

提高汽车的燃料效率     

Decic.  J 张牛 《科学中国》1995,(4):1-7

蓄电池和燃料电池是解决问题的唯一途径吗？事实上，改进常规内燃驱动汽车的设计，就能使空气较为洁净并减少石油进口。  相似文献