压缩空气系统事故影响因素分析

引入事故树分析法和层次分析法对压缩空气系统出现的事故进行了理论上的分析,有助于发现事故发生各致因间的关联和权重,对企业的安全生产管理提供决策依据。     

金属矿山地下开采安全评价方法研究

金属矿山地下开采引发的灾害形式多样、机理各异,系统安全评价指标体系难以统一确定.本文以层次分析法为理论基础,建立一套综合的评价方法,并结合目前金属矿山灾害事故的特点和规律,用比较矩阵确定各致灾作业形式的权重,从而提高了矿山安全评价的准确性和科学性.     

应用层次分析法确定影响巷道掘进效率的因素

层次分析法是一种层次权重决策分析方法。介绍了层次分析法理论以及应用层次分析法的一般步骤和计算方法,并对大屯锡矿影响其掘进效率的工人熟练度、凿岩时间、喷浆时间、管理水平等20个因素进行分析,根据专家打分对各影响因素进行赋值,通过分析计算确定了各影响因素的优先级,从而得出了影响掘进效率的主要因素为凿岩时间、喷浆时间、维修设备时间及管理水平4个因素,其占总权重数分别为32.4%、15.4%、15.4%和12.6%。最终,在此基础上对凿岩、喷浆、设备停修等问题提出了相应的改进措施。     

地质钻探工程中井塌事故的原因分析及预防策略

地质钻探是直接获取地下实物信息的唯一技术手段,是多种学科验证的基础方法,具有很高的应用价值。但其成本高和受地质环境因素影响大,一旦工艺工法应用不当,会发生较大的事故,特别是井塌事故,轻则延误工期,重则造成废井。为此,要对井塌事故造成的原因进行分析并研究预防策略,从而减少地质钻探工程中的井塌事故。     

矿山水文地质工程钻探关键技术研究

由于矿山水文地质工程钻探施工难度较大,为此提出矿山水文地质工程钻探关键技术研究。根据工程地质特征,对钻孔、钻具、钻孔间距等钻探施工参数进行合理设计,对钻探设备进行选择;利用密度调整法对钻探施工过程中的地层压力进行预测;卡钻作为工程钻探过程中常见的孔内事故,根据不同规格绳索取心管的计算系数,计算出卡点位置,通过采取上提、下放、转动活动钻具等措施,对卡钻事故进行处理。通过以上三种技术完成了矿山水文地质工程钻探关键技术研究。     

岩溶地区冲(钻)孔桩施工常见事故防治及其对策

由于岩溶地质条件复杂性,往往会因坍孔、涌水、卡钻、埋钻、桩孔偏斜等事故,而妨碍冲钻孔桩施工进度,并带来较大损失,为此,要重视冲钻孔桩事故防治,做好勘察、监理、技术培训等工作,较好的完成冲钻孔装施工任务.本文结合岩溶地区特点,详细探讨冲(钻)孔桩施工常见事故,并提出防治性的技术措施,最后就如何提升冲(钻)孔桩施工质量,提出相应管理对策,以作借鉴.     

鱼刺图分析法在煤矿水灾中的应用

通过研究透水事故发生规律,根据事故致因理论,结合现场的一些实际情况,对透水事故进行了系统分析,并以"鱼刺图分析法"为基础绘制了贴近实际的煤矿透水事故鱼刺图。通过对鱼刺图中的各个因素的分析,提出了针对性的防治措施。为煤矿透水事故的控制和安全管理提供理论帮助,从而最大程度避免事故的发生,减小对井下作业的影响,维护煤矿安全高效的生产秩序。     

坑道内小口径金刚石岩心钻探常见事故的分析与防治

介绍了坑道内小口径金刚石岩心钻探现场常见事故的表现形式,事故处理方法,分析了钻杆跳动、断钻杆、烧钻、卡钻等事故的原因,并提出了相应的处理方法及预防措施.     

地质岩心钻探施工中吸附卡钻事故处理分析

地质岩心钻探施工中吸附卡钻事故经常发生,在卡钻事故发生之后,一旦处理不当,就会导致部分钻孔被迫提前终孔,无法达到理想的地质岩心钻探施工目标。因此,本文以某地质岩心钻探施工项目ZK2562号孔为例,对该孔发生吸附卡钻事故的起因及处理方案进行了简单的分析。     

钻井中几种常见卡钻事故及操作上的预防

钻井卡钻事故自从有钻井勘探那一天起,就是围绕井队的一个难题.给井队造成了巨大的人力物力及经济上的损失.其实有些卡钻事故只要我们细心的面对还是能够避免的.综合自己在钻台上十几年的工作经历,根据井下卡钻事故的特征并结合现场经验,特从司钻探作者的角度来分析一下预防措施以减少事故的发生.     

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.     

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。     

抗腐蚀高强耐磨涂料研发与应用

介绍了抗腐蚀高强度耐磨涂料的研制和开发，以及用作柳钢球团回转烘干机刮板保护涂层的应用效果。