宝钢电厂3号机组烟气脱硫GGH设置与否的探讨

简要说明宝钢电厂增设湿式石灰石-石膏法(FGD)烟气脱硫装置的必要性,探讨了FGD烟气脱硫系统中再热式烟气-烟气换热器(GGH)设置的技术利弊.依据宝钢电厂3号机组增设FGD脱硫装置有关技术参数,对脱硫系统中GGH设置的一次投资、长期运行费用进行了比较,由于脱硫系统GGH设置与否会引起烟囱排放温度的改变,依据相关标准对脱硫系统GGH设置与否的烟气抬升高度的改变进行了计算,依据《环境影响评价技术原则与方法》计算了GGH设置对烟气污染物扩散的影响,最后提出取消GGH的相关前提条件.     

浅谈铝电解生产的烟气净化技术

本文浅析了铝冶炼工业生产存在的环境问题，介绍了国内外铝冶炼工业烟气净化技术现状，论述了铝冶炼烟气净化技术，即“烟气收集、烟气净化、物料循环”能从根本上解决铝冶炼生产污染问题，实现铝冶炼工业的可持续发展。     

金川公司冶炼烟气治理思路

主要针对金川公司“十五”实施后所产生的镍、铜冶炼烟气的治理进行了思考，同时对冶炼烟气用于制酸后硫酸的生产规模、投资、效益进行了简单的分析，以期达到抛砖引玉的目的。     

宝钢烧结烟气脱硫石膏特性分析

通过粒度、X-射线荧光、X-射线衍射、纯度、重金属、浸出特性等分析,研究了宝钢烧结烟气脱硫过程中产生的石膏的特性.结果表明,宝钢烧结烟气脱硫石膏纯度高,杂质含量低,粒径较大且分布广,质量满足相关设计和标准要求;烧结烟气脱硫石膏及其浸出液重金属含量低,综合利用、堆存或填埋等处置过程中,基本不会对周围环境造成不利影响.     

玻璃钢在冶炼烟气脱硫装置中的应用

简述了玻璃钢的特点，介绍了玻璃钢在冶炼烟气脱硫装置中的应用情况。     

浅谈合金硫化炉烟气污染的治理

以关于合金硫化车间生产过程的有关实测数据为依据，针对合金硫化炉气治理问题，提出了以完善工艺，改进设备的治理思路。同时对改进中的其他问题也进行了计算和说明。     

铁矿石烧结烟气中和的试验研究

铁矿石烧结烟气中和的试验研究［法］Ｐ．Ｒｏｍｅｌｏｔ等１引言１９９３年３月１日的政府法令从总体上规定了各类设备的排污量：粉尘排放量限制在５０ｍｇ／ｍ３以内，ＳＯ２和ＮＯｘ排放量限制在５００ｍｇ／ｍ３的范围内。但同意某些特殊工业和设备例外，因此，对铁矿...     

株洲冶炼厂铅烧结烟气治理

介绍了株洲冶炼厂铅烧结烟气治理的推荐方案及治理效果。     

余热回收利用技术在电解铝净化烟气管道上的应用

从烟气余热回收利用技术出发,针对目前电解槽烟气温度较高,不能回收利用,从烟气余热情况介绍、余热回收方案设计的等方面分析了烟气余热回收利用的可行性及经济效益,提出了一些提高烟气余热利用的经济性和利用潜力的措施,供同行业商榷。     

石灰湿式烟气脱硫中复合添加剂的研究

本文针对石灰湿式烟气脱硫中在低pH段脱硫率低等问题，提出了在系统中加入复合添加剂的方法，并进行了脱硫实验，取得了较好的效果。     

Evaluations and expectancies of alcohol and marijuana problems among college students.

Two studies examined the associations between evaluations (good-bad) and expected likelihood (likely-unlikely) of alcohol- and marijuana-related problems and hazardous consumption and problems among college students. Participants provided data on alcohol use, alcohol-related problems, and expectancies and evaluations of alcohol problems; marijuana use indices, marijuana-related problems, marijuana effect expectancies, and likelihood and evaluations of marijuana problems. Evaluations of alcohol problems were positively related to the number of binge drinking occasions and alcohol-related problems. The interaction between evaluations and expectancies was significant in predicting the number of binge drinking occasions. Expectancies demonstrated a curvilinear relationship with binge drinking and alcohol-related problems. Marijuana users evaluated marijuana-related problems as less negative and less likely to occur than did nonusers. Expectancies, but not evaluations, of negative consequences were significantly associated with marijuana use intensity. Expectancies of problems demonstrated a curvilinear relationship with marijuana-use intensity and marijuana problems. Men evaluated alcohol and marijuana problems less negatively than did women. In summary, the expected likelihood of alcohol-marijuana problems and the evaluation of such problems represent a vulnerability factor associated with increased liability for hazardous alcohol and marijuana use. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Compound Problem Solving: Insights from the Workplace for Engineering Education

For engineering educators who incorporate real-world problems into their teaching, it is essential to understand real-world problem solving and the nature of problems for better design of the instruction. Prior research provided evidence that real-world problems involve many stakeholders, are complex, and have multiple solutions and solution paths. The purpose of this paper is to provide additional insights particularly into the structure/class of workplace problems and associated models of expertise. This paper describes the findings of a study that employed a two-step process: (1)?a single-case study of a steel engineer generating a model of compound problem solving and (2)?a multi-case comparison of 90 problem-solving narratives of other engineers to the single case. The study is located in a U.S. context. Results indicate that real-world problems are intertwined problems (compound problems) and that transitions from one problem type to another within a compound problem are a unique class of problems themselves. These transition problems have properties that are not represented in other problem types and provide insights into expertise and expertise development in problem solving.     

Male and female estimates of personal problems of men and women.

100 male and 100 female undergraduates estimated the types of problems males and females would present at a counseling center. Of 75 problems on a problem checklist, 35 problems were seen as being more typically female whereas only 16 were seen as being more typically male. Sex differences in estimates were found for 13 problems; however, these differences did not affect whether the problems were seen as male or female. Of the 16 male problems, 8 were vocational-educational problems, while none of the female problems was vocational-educational. A 2nd purpose of the study was to look at sex differences in problems presented by actual clients at a university counseling center. Of the 75 problems on the checklist, sex differences were found for only 3 problems. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Equivalence in symbolic and nonsymbolic contexts: Benefits of solving problems with manipulatives.

Children's failure on equivalence problems (e.g., 5 + 4 = 7 + __) is believed to be the result of misunderstanding the equal sign and has been tested using symbolic problems (including "="). For Study 1 (N = 48), we designed a nonsymbolic method for presenting equivalence problems to determine whether Grade 2 children's difficulty is due to the presence of symbols or to a more fundamental misunderstanding of equivalence. Children's superior performance on nonsymbolic versus symbolic problems suggests that children fail to map their understanding of equivalence onto problems presented with the symbols of arithmetic. For Study 2 (N = 32), we implemented a within-subject design to assess whether experience with nonsymbolic problems would facilitate performance on symbolic problems. This hypothesis was confirmed. Exposure to nonsymbolic problems may have enabled children to map their successful concepts and strategies to symbolic equivalence problems. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Using Latent Trait Modeling to Conceptualize an Alcohol Problems Continuum.

Recent research points toward the viability of conceptualizing alcohol problems as arrayed along a continuum. Nevertheless, modern statistical techniques designed to scale multiple problems along a continuum (latent trait modeling; LTM) have rarely been applied to alcohol problems. This study applies LTM methods to data on 110 problems reported during in-person interviews of 1,348 middle-aged men (mean age=43) from the general population. The results revealed a continuum of severity linking the 110 problems, ranging from heavy and abusive drinking, through tolerance and withdrawal, to serious complications of alcoholism. These results indicate that alcohol problems can be arrayed along a dimension of severity and emphasize the relevance of LTM to informing the conceptualization and assessment of alcohol problems. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

A structure-mapping model for word problems.

Tested predictions of a structure-mapping model for word problems in 4 experiments involving 132 undergraduates. In Exps I and II, Ss rated the potential usefulness of solutions for pairs of problems—mixture problems in Exp I and work problems in Exp II. The problems were either equivalent (same story, same procedure), similar (same story, different procedure), isomorphic (different story, same procedure), or unrelated (different story, different procedure). Ss in Exp III used an example solution for a work problem and a mixture problem to generate equations to related test problems that differed in their mappings from the example. In Exp IV, Ss matched concepts in the test problems to corresponding concepts in the examples to provide a direct measure of their ability to construct mappings across different problems. In Exps III and IV, Ss performed significantly better on isomorphic problems than on similar problems, and significantly better on work isomorphs than on mixture isomorphs. Results suggest that a structure-mapping model that emphasizes the transparency and structure of the mapping can be used to predict the usefulness of a solution. (19 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Common Interface Problems among Various Construction Parties

The objectives of this paper are to identify and assess the interface problems among the various construction parties. The methodology used in this research consists of two phases. In the first phase, a literature review and interviews with various construction professionals were conducted in order to identify the interface problems among them. This resulted in the identification of 19 common interface problems, which were classified into four categories: financial problems, inadequate contract and specification, environmental problems, and other common problems. In the second phase, a questionnaire was developed that included the identified interface problems obtained from the first phase. This survey was then randomly distributed to selected samples of 102 various construction professions consisting of owners, designers, general contractors, subcontractors, and maintenance contractors from Saudi Arabia to evaluate the severity of the 19 identified interface problems. The relative severity of the categories and their related problems were determined and then ranked according to a severity index. Three categories were found to have a “severe” effect, while the remaining category was rated “moderately severe.” Fourteen of the detailed common problems were evaluated as “severe,” while the remaining five were evaluated as “moderately severe.” Furthermore, this study presents additional common problems obtained from the survey.     

Can memory requirements account for species' differences in invisible displacement tasks?

We tested the hypothesis that poor performance on the Piagetian invisible displacement task is related to increased memory requirements. Rhesus monkeys and orangutans received 3 types of problems (invisible, visible, and no transfer problems) each containing a number of steps equivalent to that of standard invisible displacements. If failure to solve invisible displacements was due to increased memory requirements, then the primates should perform at chance level on all 3 problems. However, rhesus monkeys solved visible and no transfer problems, but not invisible transfer problems. Half of the orangutans solved all 3 transfer problems, although their performance on invisible transfer problems was lower than that on the other problems. A subsequent cuing phase led to improved performance, and a few monkeys solved invisible transfer problems. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Parent psychopathology, parenting, and child internalizing problems in substance-abusing families.

A structural model accounting for child internalizing problems in substance-abusing families was tested. Parents receiving substance abuse treatment (N = 242) completed forms about children between the ages of 6 and 18 who resided in their home. The effects of parent gender, child gender, and child age were controlled. Negative parenting was examined as a mediator between parent internalizing and externalizing problems and child anxiety and affective problems using path analysis. Negative parenting mediated relations only between parent internalizing problems and child affective problems. High-positive involvement moderated relations between parent externalizing problems and child internalizing problems. Relations between parent externalizing problems and child anxiety and affective problems were significant only among families in which high-positive involvement was present. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Schema induction in children's analogical problem solving.

Three experiments were conducted to explore the ability of school-age children to transfer solutions to analogous problems. This research addressed the issue of how the variability of procedural features in source examples facilitates the induction of a general problem schema and, thus, promotes subsequent transfer. Children were asked to solve a series of problems analogous to A. S. Luchins's (1942) classic waterjar problems. All the problems shared a common isomorphic structure and a general solution but required either similar or different specific procedures. Children who experienced problems with variant procedural features were more likely than those who experienced problems with invariant procedural features to construct a general problem schema and to solve novel problems requiring unfamiliar procedures. This research sheds light on the cognitive mechanisms involved in strategy generalization and analogical problem solving. (PsycINFO Database Record (c) 2010 APA, all rights reserved)