作业条件危险性评价法在炼铁厂的应用探讨

作业条件危险性评价法是对生产作业单元进行的危险性评价,评价的结果能够比较直观反映出各单元的危险程度,为企业安全管理提供指导。在对炼铁厂发生事故分析的基础上确立了作业条件危险性评价法的适用性。提出了以操作者具体的一项操作为评价单元的思路。并以实例对该方法的应用进行了探讨。     

轧机油气润滑供油系统改进

为了提高油气润滑系统的可靠性,降低系统的维护成本,针对轧机油气润滑系统展开了研究。重点介绍了轧辊及辊道油气润滑系统润滑原理,对设备润滑点及油液需求量进行了分析。通过分析供油单元的工作原理,提出油气润滑系统供油系统的改进设计方案,并重新设计了集成块及泵站,此方案可以实现节能减排并提高油气润滑的效率和可靠性。     

韶钢第三轧钢厂加热炉油气混烧技术应用

介绍了韶钢第三轧钢厂采用油气联合烧嘴,对１号加热炉进行油气混烧技术改造的情况和取得的经济效益。     

根据构造脊和地球化学指标研究油气运移路径:以东濮凹陷濮卫地区为例

以往关于油气运移路径的认识,多是基于微观尺度上的物理模拟实验,或是利用计算机模拟进行的,而对油气运聚单元尺度的油气运移路径的确定研究还相对较少.以东濮凹陷濮卫地区为例,从砂体和断层要素研究出发,分析油气的优势运移通道,结合生烃灶和油气的分布,对优势运移通道的有效性进行评价,进一步结合含氮化合物指标,识别实际发生油气运移的路径.研究表明,构造脊分析与地球化学指标追踪相结合可以较准确地识别油气运移路径,砂体顶面构造脊和断层断面脊是油气运移的优势通道,其能否成为运移路径,以及作为运移路径运载量的多少则取决于生烃灶总烃量.濮卫地区油气沿断面脊纵向运移为主,洼陷内部和濮城构造东翼斜坡带沿砂体顶面构造脊的横向运移次之,含氮化合物指标分析表明该区大多数构造脊均为实际的油气运移路径.     

除尘风机变频器控制系统设计与实现

文章通过对2#风机电机控制系统进行改造,将其控制系统改造为变频控制系统,解决在生产高峰期除尘风机出力不足的问题,并能够根据工艺要求对除尘风机进行无级调速,实现节能降耗的目的。同时对2#风机进行了远程监控改造,确定了以S7-400系列的PLC作为控制单元,以ET200M作为远程控制站,实现2#风机电机变频控制的远程监控和管理。     

中板轧机主传动万向接轴辊端接头断裂事故分析

采用机械测试、三维有限单元、金相组织分析等现代综合分析技术 ,对中板轧机主传动万向接轴辊端接头断裂事故进行分析。事故的主要原因是热处理工艺不当     

浅谈用电管理对电网安全运行的重要性

1　概述随着太钢企业管理向纵深发展,电网的安全运行已日益成为保证太钢正常生产的重要环节。1995年～1999年太钢电网事故统计表明,供电主系统在经历了管理手段的强化、新技术的应用和标准化操作的全面实施等工作后,1999年事故总数比1995年降低了68%。我们根据1995年～1999年事故统计以及对故障进行分类和综合分析,结果表明:故障在供电、用电中的比例发生了结构性的变化,针对这一问题我们提出了对策和应采取的措施。2　太钢电网总况介绍2.1　太钢电网结构太钢现有220kV总降压站1座,110kV总降压站6座,总装机762500kVA。由以上总降压站分别…     

DEP-800综合自动化装置在开关站中的应用

文章结合某钢厂工程实际,以高炉鼓风机10 kV开关站设计为例,分析了DEP-800系列分散式微机保护与控制单元的软硬件组成、功能及其在开关站设计中的应用,讨论了DEP-800综合自动化装置在10 kV开关站中的应用效果,根据生产实践经验,提出了对该装置的改进建议。     

北京地铁4号线自动扶梯发生故障致1死30伤

事故原因:驱动链条脱落导致扶梯下滑 7月5日上午,北京地铁4号线动物园站A口上行扶梯事故发生后,记者了解到,出事扶梯生产厂家为奥的斯电梯(中国)有限公司.当事公司称,由于现在原因尚未查明,所以赔偿方案无法确定."等原因认定以后,我们会根据政府部门的要求和相关法律法规来制定赔偿方案."     

110kV主变压器近区短路故障分析及应对措施

通过对110kV主变压器近区短路故障进行四测分析法(绝缘电阻试验、绕组直流电阻试验、油气相色谱分析、绕组变形测试)分析,可大幅度精简试验项目,准确有效地分析事故情况,判断变压器运行状态,同时将分析时间由20h缩短至5h,提高变压器突发性近区短路事故处理效率和准确率。     

Voices of fear and anxiety and sadness and depression: The effects of speech rate and loudness on fear and anxiety and sadness and depression.

Two studies investigated the role of expressive vocal behavior (specifically, speech rate and loudness) in fear and anxiety and in sadness and depression. In the 1st study, participants spoke about personally experienced fear and anxiety-arousing and neutral events using 3 different voice styles: fast and loud, normal, and slow and soft. In the 2nd study, participants spoke about personally experienced sad or depressing and neutral events using the same 3 voice styles. In both studies, the participants' highest levels of subjective affective and cardiovascular (CV) arousal occurred when they spoke about the emotional events in a mood-congruent voice style: fast and loud in the case of fear and anxiety, and slow and soft in the case of sadness or depression. Mood-incongruent voice styles canceled the heightened levels of CV arousal normally associated with these negative emotions. The voice-style manipulation had no significant effect on the participants' levels of CV arousal during the neutral discussions. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Synthesis and analysis of mixed chlorinated-fluorinated dibenzo-p-dioxins and dibenzofurans and assessment of formation and occurrence of the fluorinated and chlorinated-fluorinated dibenzo-p-dioxins and dibenzofurans

Despite the use of multimodal therapy, higher-grade glioma is still uniformly fatal in the adult population. There is a considerable difference between the length of survival in each given patient, even within the same tumor type and malignancy grade group, suggesting that there are factors that might differentially influence outcome. To identify such factors, 107 patients with anaplastic or malignant glioma were retrospectively investigated. Clinical parameters and paraclinical data on the p53, mdm2, and EGFR genes at the DNA or protein level were evaluated by univariate analysis and Cox proportional hazards regression modeling. Kaplan-Meier survival estimation demonstrated that immunohistochemical positivity for mdm2 protein in patients with anaplastic astrocytoma or with glioblastoma multiforme was associated with a shorter survival time (p = 0.02). P53 gene mutations and immunopositivity for the epidermal growth factor receptor (EGFR) protein were not significantly related to poor prognosis. The Cox proportional hazards model revealed immunohistochemical positivity for p53, mdm2, or for both of them, the presence of postoperative irradiation, and the extent of surgical resection of tumor to be variables significantly associated with prolonged survival. EGFR overexpression, age over 60 years, and Karnofsky performance score below 40 points did not significantly shorten survival time. In conclusion, the present study identified immunohistochemically detected mdm2-protein overexpression as a statistically significant negative prognostic parameter in patients bearing anaplastic or malignant glioma. Association analysis of variables revealed a possible correlation between mdm2 and p53, which is also consistent with the biological interaction mode of both proteins in vivo.     

Sexuality and aging--usual and successful

BACKGROUND: As aging research increasingly reflects an effort to dissociate true time-driven changes from those that can be improved, sexuality in later life remains largely unexplored. Several problems are evident. There is a lack of normative data, a lack of a conceptual framework relating to the biology, psychology, and sociology of sex, and an attitudinal resistance that obscures the entire topic. METHODS: We conducted a three-part instructional series on major topics involved with sexuality and aging. We surveyed our group of attendees (n 158, average age 68 for males, 65 for females) before and after the series. RESULTS: A remarkably robust sex life was evidenced by both the men and the women, even until advanced old age. Yet, a substantially decreased involvement was reported from 10 years earlier. Despite current activities, people of both sexes wished they were participating even more than they currently were. Impotency was identified as the major negative feature for the men; relationship problems were for the women. A questionnaire 6 months after the series reported improved sexual attitudes, but no change in sexual activities from the earlier survey. CONCLUSION: Sexuality is a major quality-of-life issue which persists into old age. Our study showed that the usual sexual practices reported by our group were not considered by them to be ideal. The intervention of this instructional series provided improved sexual attitudes but not performance. Additional studies are encouraged.     

Spondylolysis and spondylolisthesis and sports

Spondylolysis and spondylolisthesis occur predominantly in the lower lumbar spine. Besides congenital defects such as predisposition of spondylolysis the correlation between competitive sports activities and an increased incidence of spondylolysis is proved. In early stages, complete healing can be achieved by conservative treatment (abstinence from sports activities for 3 months, orthesis). Persistence of pain, neurologic symptoms and progression of vertebral slipping are indications for operative treatment (reconstruction of the isthmus, dorso-ventral spondylodesis). The exercise tolerance depends on the extent of instability, progression of vertebral slipping and clinical symptoms. The limits of exercise tolerance vary among the individual athletes and require the decision of the physician. Backstroke swimming, abdominal and back muscle strengthening exercises, and types of sport involving smooth movements are advisable. Sports education in school is possible without restriction in patients with stable spondylolysis and in those with spondylolisthesis without unfavourable concomitant factors.     

Larks and owls and health, wealth, and wisdom

OBJECTIVE: To test the validity of Benjamin Franklin's maxim "early to bed and early to rise makes a man healthy, wealthy, and wise." DESIGN: Cross sectional analysis of sleeping patterns in a nationally representative group of elderly people, and longitudinal investigation of mortality. SETTING: Eight areas in Britain (five in England, two in Scotland, and one in Wales). SUBJECTS: 1229 men and women aged 65 and over who in 1973-4 had taken part in a survey funded by the Department of Health and Social Security and for whom data on sleeping patterns, health, socioeconomic circumstances, and cognitive function had been recorded. MAIN OUTCOME MEASURES: Self reported income, access to a car, standard of accommodation, performance on a test of cognitive function, state of health and mortality during 23 years of follow up. RESULTS: 356 people (29%) were defined as larks (to bed before 11 pm and up before 8 am) and 318 (26%) were defined as owls (to bed at or after 11 pm and up at or after 8 am). There was no indication that larks were richer than those with other sleeping patterns. On the contrary, owls had the largest mean income and were more likely to have access to a car. There was also no evidence that larks were superior to those with other sleeping patterns with regard to their cognitive performance or their state of health. Both larks and owls had a slightly reduced risk of death compared with the rest of the study sample, but this was accounted for by the fact that they spent less time in bed at night. In the study sample as a whole, longer periods of time in bed were associated with increased mortality. After adjustment for age, sex, the presence of illness, and other risk factors, people who spent 12 or more hours in bed had a relative risk of death of 1.7 (1.2 to 2.5) compared with those who were in bed for 9 hours. The lowest risk occurred in people who spent 8 hours in bed (adjusted relative risk 0.8; 0.7 to 1.0). CONCLUSION: These findings do not support Franklin's claim. A "late to bed and late to rise" lifestyle does not seem to lead to socioeconomic, cognitive, or health disadvantage, but a longer time spent in bed may be associated with increased mortality.     

Craniometaphyseal and craniodiaphyseal dysplasia, head and neck manifestations and management

Mechanical allodynia (MA) following hand injury is a well-documented clinical problem. The purpose of this pilot study was to examine the relationship between hand MA and the upper limb tension test (ULTT). The ULTT mechanically stresses the neural structures from the C5/6/7 neural foramina to the median nerve distally. This study examined 29 subjects with unilateral hand MA before and after a 2-week neural self-mobilization programme. There was a significant difference between the subjects' affected and unaffected sides when tested using the ULTT, both in reproduction of symptoms and in reduced range of motion of the ULTT. Following the self-mobilization program, there was an improvement in the range of the ULTT, and subjects reported a reduction in their symptoms. Complete recovery was not obtained in all cases. The results of this study suggest that the ULTT is a useful tool both in assessment and treatment of subjects with hand MA.     

深云立交桥梁检测及加固改造

根据深云立交桥梁的检测结果，对该桥目前的整体状况、工作状态，及其使用情况做出综合评价，对桥的病害原因进行了分析，并提出合理的加固方案。     

关于摩尔浓度及其与硬度转换关系问题的讨论

众所周知，国际单位制物质的量采用摩尔(mol)表示，近几年出版的给排水专业书籍，为了与国际单位制接轨，逐渐将摩尔的使用频率不断提高，被给排水技术人员广泛应用的新版给排水设计手册，将表示物质浓度的单位“当量／升”或“毫克当量／升”．改为mol／l或mmol／l，虽然编者对其基本单元定义作了说明，但在实际运用上仍会出现误解，     

《儿子与情人》的语码转换与男女二元对立

劳伦斯小说《儿子与情人》一个鲜明的语言特色就是标准英语和当地方言频繁的语码转换。莫瑞尔用方言来对抗妻子,而妻子坚持用标准英语,偶尔也用方言来讽刺、挖苦丈夫。语码转换反映了劳伦斯男女二元对立的哲学思想。