直立炉煤气净化DCS控制系统

直立炉煤气净化系统主要由鼓风冷凝、脱硫及煤气加压三部分组成,在实现了直立炉煤气的回收再利用的同时,鼓风冷凝后的煤气经过脱硫送到煤气加压,通过气柜缓冲来稳定煤气的输出.基于浙大中控DCS的煤气净化系统主要包括鼓风冷凝的集气管压力调节、气柜高度控制、煤气加压站的加压稳压控制、工艺主要参数显示等功能.     

济钢煤气加热炉高效燃烧控制系统改造

济钢对副产煤气加热炉高效燃烧控制系统进行改造 ,煤气混合系统通过控制焦、高、转炉煤气的比例和压力 ,保证了混合煤气的热值和压力稳定 ;加热炉DCS系统通过控制加热炉废气中残氧量 ,调节空燃比 ,使燃烧达到最佳状态 ,提高了炉内钢坯的加热质量 ,实现了节能降耗和环境保护的目的     

泰钢煤气混合控制系统的改造

泰钢30万t冷轧薄板项目配套的煤气混合加压站因原设计未充分考虑实际生产的波动性,煤气流量、压力波动大,热值不稳定,煤气混合加压站无法正常运行。采取先加压、后混合的工艺,并引入了热值调节系统,对煤气混合加压系统进行改造,最终实现了混合煤气品质的相对稳定,热值稳定在8368kJ,压力稳定在11kPa,保证了正常生产。     

基于PLC＋软启动的煤气加压站控制系统的设计

为了实现煤气加压过程中，更好的调节煤气压力，韶钢某煤气加压站以PLC＋软启动的方案设计了一个煤气加压站控制系统。设计了完善的上位机的监控系统，使整个系统运行安全可靠，维护方便快捷。     

3号柜煤气混合加压控制系统改造

杭钢3号柜煤气加压站控制系统于2007年进行了改造,着重介绍改造后混合煤气热值控制系统思路和优点,有效实现了混合煤气热值和压力的控制。     

环形煤气加热炉DCS集散控制系统

本文介绍了DCS集散控制系统在环形煤气加热炉中的应用，简述了硬件结构和软件设计原理。实践证明，该控制系统运行可靠，温度、压力控制精度高。     

混合煤气热值调控不稳的原因与对策

介绍了邯钢东区钢后煤气加压站采用"先加压后混合"工艺为不同用户供应不同热值的混合煤气或单种煤气。分析了加压混合站煤气供应热值、压力不稳以及酸再生灭火的原因。采用变频调节技术,开发了"参照、给定、跟踪"调控技术,解决了混合站煤气热值、压力不稳的问题,保证了相关生产线的安全稳定生产。     

制氢站煤气净化、加压、混合部分现场控制系统的应用

介绍了马钢新区第二能源总厂制氢站煤气加压混合站采用的现场控制系统,阐述了系统对加压机、混合站的自动控制,实现了煤气的稳定供给,为制氢站最终实现无人值守作了探索。     

宝钢单高炉生产阶段煤气系统的安全运行

宝钢的煤气包括高炉煤气(BFG)、焦炉煤气(COG)和转炉煤气(LDG)三种。煤气系统的任务是:合理控制各种煤气输配管理设备,如煤气柜、加压站、混合站、能源中心等,以达到合理平衡煤气、稳定系统压力、减少煤气放散,确保煤气的安全供应。在一高     

铁合金电炉煤气加压站设计要点

为解决铁合金企业由于电炉煤气不稳定造成的燃气管网的压力波动,从加压机设计选取,加压站厂房的布置及安全等方面,阐述铁合金电炉煤气加压系统的设计,解决了铁合金企业煤气回收、输配系统中常见的问题,确保了企业节能减排的良好效果。     

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。