一钢公司蒸汽系统存在问题及改进措施

从设计、运行、整改等方面对上海一钢公司蒸汽系统安全阀起跳、压力冲击、运行输配等问题进行了分析和探讨,找出了问题的症结所在,并提出了相应的解决措施。     

不锈钢分公司蒸汽系统存在问题及改进措施

从设计、运行、整改等方面对不锈钢分公司蒸汽系统安全阀起跳、压力冲击、运行输配等问题进行了分析和探讨,找出了问题的症结所在,并提出了相应的解决措施.     

铜绿山铜铁矿尾矿库安全运行实践

针对大冶有色金属集团控股有限公司铜绿山铜铁矿尾矿库建库、运行管理以及运行中出现的问题及整改情况进行了详细论述,并指出了现存的问题及改进建议。对有色矿山尾矿库运行管理有借鉴作用。     

某钢铁厂空压机油雾回收节能改造实践

介绍了空压机在运行中出现的油雾排放、电机轴承温度高、漏油、润滑油消耗高、空气滤芯寿命短等一系列问题,分析了以上问题产生的原因,提出了排烟装置技术改造方案,实现了空压机经济、环保运行.     

攀钢连铸机氢氧切割工艺技术研究

针对现有连铸机使用焦炉煤气-氧火焰切割技术存在的问题和国内氢氧火焰切割技术存在的投资高、运行成本高、切割断面小等一系列问题进行了研究,提出并解决了大型连铸机氢氧切割工艺技术问题,取得了降低钢材损失、运行成本,提高断面质量等成果。     

铸铁机防掉带链板的设计与应用

铸铁机在试车或正常运行一段时间后常出现掉带,就此问题,从产品制造、安装、运行方面分析了原因,并对结构进行了改进设计,有效的解决了铸铁机掉带问题。     

氮压机运行工况的调整实践

对某钢铁企业氮压机在运行过程中频繁卸载、工况不稳等问题进行分析,通过对机组入口管道扩径,增加旁通阀改造,以及调整运行参数等措施,稳定了运行工况,降低了运行成本.     

供热汽轮机调速系统卡涩、负荷突变的解决措施

凌钢热电厂50MW单抽供热机组自投运以来,一直未能正常运行,调速系统存在卡涩、负荷自动滑动的问题,而且突增、突减现象频繁发生,有时出现大幅度的负荷摆动,调压器投不上,严重影响机组的安全运行。针对上述问题,采取了具体解决措施,运行实践证明,所有问题均得到解决。     

热电锅炉电除尘器技术改造

杭钢热电厂1号锅炉电除尘器运行中易出现死机、阴极短路、电磁振打器失常等问题.经过技术改造后,提高了电除尘器的抗干扰能力,基本消除了死机现象,解决了承压绝缘子、绝缘轴破损断裂的问题,确保了电除尘器的正常运行.     

烧结烟气SDA脱硫工程实践及运行优化

对鞍钢股份有限公司鲅鱼圈钢铁分公司405 m2烧结机采用旋转喷雾干燥法(SDA)烟气脱硫工艺原理、技术参数及工程实践进行了介绍,并对运行初期出现的问题进行了分析,核算关键技术参数运行合理性,找出问题原因并采取改进措施。通过系统改进实现了脱硫系统稳定运行,取得良好的减排效果。     

An affective-motivational model of marijuana and alcohol problems among college students.

The study examined models of marijuana (n = 309) and alcohol (n = 731) problems. Impulsivity was directly associated with both marijuana- and alcohol-related problems. Negative mood regulation expectancies were indirectly associated with marijuana problems through coping motives. Sensation seeking was indirectly associated with alcohol problems through enhancement motives. Affect lability and negative affect were indirectly associated with alcohol problems though coping motives. In both models, coping motives were directly associated with use-related problems. A multigroup analysis indicated that the association between negative affect and coping motives as well as use and problems was stronger among participants using both alcohol and marijuana relative to alcohol only. Enhancement motives were a stronger predictor of alcohol use among participants using alcohol only. (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.     

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)     

The influence of problem ownership on teachers' perceptions of and strategies for coping with problem students.

98 elementary school teachers read vignettes depicting incidents involving (fictional) students who presented chronic behavior problems and then told how they would respond if the incidents occurred in their classrooms. Responses were coded for attributions about the students and about the Ss' roles in causing and correcting the problems. Ss attributed controllability and intentionality to students presenting teacher-owned problems but not to students presenting student-owned problems. Students presenting shared problems often were seen as able to control their behavior but not as misbehaving intentionally. The contrasting patterns of attribution seen in these 3 levels of problem ownership were associated with contrasting patterns of goals and strategies, as well. The data bear out expectations based on attributional analyses of helping behavior but raise questions about teachers' preparedness to cope with problem students. (24 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Hard-to-manage preschool boys: externalizing behavior, social competence, and family context at two-year followup

Boys, identified as hard to manage in preschool, were followed up 2 years after initial assessment. Mothers, fathers, and teachers continued to rate hard-to-manage boys as having more problems with attention and impulse control, and as more oppositional, than comparison boys who had been problem-free at intake; problem boys also were rated as less socially competent by all three informants. Differences in severity were apparent as a function of initial referral source. Boys identified as showing significant problems by at least two informants (28% of the problem boys) were especially low in social competence and their mothers reported more symptoms of depression and parenting stress. Family adversity, lower IQ, and severity of symptoms at intake discriminated boys with continuing problems from those with less serious difficulties at followup. Control boys with potentially emerging problems were characterized by more family problems than the remaining control boys. Implications for the development of problems in young children are discussed.     

Quality of care problems among Medicare and Medicaid patients

The purpose of this study was to characterize quality of care problems among Medicare and Medicaid inpatients in New York State. The patients selected for this study comprised 1991 and 1992 Medicare and all 1992 Medicaid inpatients in whom quality of care problems with actual or potential adverse effects were found. The patients in this study were drawn from public, proprietary, voluntary and teaching hospitals. A total of 1000 quality of care problems with either actual or potential adverse effects were found in 706 Medicare patients. Two hundred and seventy-five (275) quality of care problems with actual or potential adverse effects were found in 154 Medicaid patients. Premature death occurred in 53 (7.4%) of the 706 Medicare and in 42 (27.2%) of the 154 Medicaid patients. Treatment problems and monitoring failures accounted for the majority of quality of care problems with actual or potential adverse effects for both Medicare (63.0%) and Medicaid (75.7%) patients. Among Medicare patients, the treatment of infections and antibiotic use, fluid and electrolyte management, and inappropriate drug use were among the leading causes of quality of care problems. Attending physicians were associated with the majority of Medicare quality of care problems while house staff and attending physicians were associated with the majority of those among Medicaid patients. The results of this study indicate that there are several leading causes of quality of care problems among Medicare and Medicaid patients. Treatment problems and monitoring failures together comprise the majority of such problems. Among Medicare patients, it was found that most quality of care problems were associated with the treatment of infections and antibiotic use, fluid and electrolyte management, and inappropriate drug use. Most quality of care problems among Medicaid patients were associated with these categories as well as with labor and delivery problems, and poor discharge planning. The results of this study reflect the peer-review process in which providers are given an opportunity to respond to physician-reviewer decisions about the presence of actual or potential adverse effects. Such a process, which permits the presentation of additional data and information by providers, produces fewer final adverse outcome determinations than a process uniquely based on chart review. The quality of care problems observed in this study are amenable to focused educational interventions. Such remedial interventions could yield significant improvements in the quality of care for all patients.     

Prevalence of voice problems in teachers

Teachers are frequently cited as experiencing a high rate of vocal dysfunction (1-7). Despite considerable research in the area of voice problems in teachers, the prevalence of voice disorders in this group is unknown. This study investigated the prevalence of self-reported voice problems in teachers using a mail survey of a simple random sample of 1168 state school teachers (preschool-Grade 12) in South Australia. As part of the survey, teachers were asked to report voice problems for the day of the survey, during the current teaching year, and during their careers. The response rate was 75%, with 16% of teachers reporting voice problems on the day of the survey, 20% reporting problems during the current teaching year, and 19% reporting problems at some time during their career. Females were twice as likely as males to report voice problems. These findings clearly indicate a need for further investigation of the causes of vocal dysfunction in teachers and for the development of educational programs aimed at preventing voice problems in this group of professional voice users.     

大型复杂铝合金型材挤压及其数值模拟技术发展概况

综述了大型铝合金型材的特点、应用及发展现状,以及挤压模具设计技术和数值模拟技术的发展现状,概述了以拉格朗日有限元法、欧拉有限体积法、任意拉格朗日-欧拉有限元法为代表的数值模拟方法及其目前尚未解决的问题,总结了大型复杂铝型材挤压数值模拟技术的难点和瓶颈。     

我国钼矿山生产现状调查分析

分析了我国钼矿山企业生产现状，指出了矿山钼精矿总产量增长过快、挖富弃贫等问题，提出了综合解决的途径。