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引入一种新的预测垃圾产量的方法——组合预测方法,该法能够综合利用不同预测方法提供的信息提高预测精度。结合厦门市1996～2008年的垃圾产量,分析不同预测方法的预测精度,并预测5年后的垃圾产量。通过研究发现:单一预测模型中,线性回归法和年增长率法的预测结果偏小,误差较大,灰色理论GM(1,1)的预测结果偏大,误差较小,基本在10%以内;组合预测模型的预测精度高于单一预测模型;厦门市城市生活垃圾年平均增长率约为10%,低于国民生产总值和社会消费品零售总额年平均增长率,高于城镇居民消费性支出年平均增长率。 相似文献
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INTRODUCTIONTheTianzilingwastelandfillbuiltin 1991toproperlydisposeofmunicipalsolidwaste(MSW)hasadesignedservicelifeof13years.Itwasfilledstagebystageatthebeginningoftheelevationof 50 .5m .Bynow ,thelandfillhasreachedthelevelof 10 2 .5m ,whichex ceedst… 相似文献
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The combustion behavior of typical components of MSW was examined with a thermal gravimetric analyzer (TGA). The experiments were done over the temperature range of room temperature to 1000℃ at a heating rate of 10 oC/min and in an oxidizing atmosphere. The results indicated that the entire weight loss process of each typical component of MSW consists of one to three distinct combustion stages. The combustion of typical components of MSW could be modeled by one to three independent reactions. The corresponding parameters of typical components of MSW such as activation energy, pre-exponential factor, and reaction order were determined. The calculated results using the comprehensive kinetic model composed of one to three independent and consecutive reactions, agreed well with experimental results. 相似文献
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垃圾压缩中转设备是垃圾转运处理的重要装备。通过分析我国城市生活垃圾压缩中转技术状况,研究了全面压缩技术和多级压缩技术特性,并应用该技术研究开发了LYC全封闭多级压缩垃圾中转设备,详细阐述了该设备的结构原理和工作原理,装备参数的实验方法。实验表明该设备具有较高的垃圾压缩比和中转效率高的性能特点。 相似文献
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Melissa B. Littlefield Karen Rubinstein Cynthia Brown Laveist 《Journal of Teaching in Social Work》2019,39(4-5):489-504
ABSTRACTThere has been a rapid increase in the number of online MSW programs in the past decade without a commensurate body of literature on their administration. This article acquaints MSW program faculty and administrators with quality assurance rubrics, which are research-informed tools intended for use by distance education providers to develop, support and manage high quality online courses and programs. Graduate programs that are in the process of considering or actually designing an online delivery option, as well as those that are currently implementing online programs, may benefit from the use of such quality assurance rubrics. 相似文献
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Jacqueline Corcoran Scott Stuart Jessica Schultz 《Journal of Teaching in Social Work》2013,33(3):226-236
Interpersonal Psychotherapy (IPT) is a relatively brief psychodynamic intervention of approximately 12 sessions focusing on how current interpersonal relationships have contributed to a person’s mental health symptoms. Areas targeted for work involve significant role transitions, grief and loss, and interpersonal disputes. IPT is an evidence-based treatment for depression, bulimia nervosa, and binge eating disorders. Despite these advantages, social work students rarely receive instruction on the delivery of IPT in their graduate programs. The purpose of this project, therefore, was to begin to address this gap by implementing an IPT component in a clinical practice course and testing student knowledge pre- and post-test. An example of sample assignments involving application of IPT to student fieldwork is provided. The sample in this study involved a small number of students enrolled in a clinical course taught in the first semester of the second year of training. Students improved their knowledge score at a statistically significant level. Implications of the study are explored, with the main conclusion being that more clinical majors in MSW programs be exposed to IPT. 相似文献
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Robin Perry PhD 《Journal of Teaching in Social Work》2013,33(1):47-70
This study utilizes linear and log‐linear stochastic models to examine the impact that a variety of variables (including graduate education) have on M.S.W. students' desires to work in clinical practice. Data was collected biannually (between 1992 and 1998) from a complete population sample of all students entering and exiting accredited graduate programs of social work in California (n = 5,793). The influences of past practice experiences, professional motivations, socio‐demographic characteristics, ideological affiliations, and education and training experiences while a graduate students were all examined. Findings suggest that there is tremendous commonality in the variability of interest toward doing clinical practice among all student groups both before and after the completion of graduate studies. Male and female students, students of varied ethnic, social class and political identifications/affiliations, along with students of varied ages did not differ in their desire or interest to engage in clinical practice. The desire to prepare for private practice had the strongest influence—that was maintained over the course of their education—on students' interests in clinical social work. Desires to work with the poor were not associated with students' desires to be clinicians who wish to apply their trade across a wide variety of problems and populations. 相似文献
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This article describes a quasi‐experimental comparison of two master's level social work classes delivering content on human behavior in the social environment. One class, delivered face‐to‐face, was largely synchronous. The other class, delivered using distance technologies, was more asynchronous than the first. The authors hypothesized that students would learn equally well in both classes, and did not reject that hypothesis. That was so even after accounting for strong explanation of achievement by grade point average adjusted for grade inflation. Though this study indicates that the distance education studied was apparently successful, the findings may not be highly generalizable, and the authors suggest that future studies need to look at achievement in various settings and curricular areas while carefully measuring and accounting for extraneous variables. 相似文献
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《Journal of Teaching in Social Work》2013,33(1-2):181-203
ABSTRACT This paper presents the findings of a study conducted on the social work values systems of social work students in the City University of Hong Kong. A social work values scale composed of six dimensions, namely human worth, potential for change, mutual care, societal responsibility, social participation and freedom to make choice, was constructed. The findings in this study indicated that all batches of students had a common pattern in the ranking of the order of the value dimensions. Not all the value dimensions had an increase in scores with the increase in training and practice experiences. The fieldwork placement was considered by the students as the most important formal channel during trainingin the acquisition of social work values. It is suggested that social work educators need to have a thorough review of the relationship between curriculum design and the inculcation of professional values. 相似文献