对广东省钢铁工业发展循环经济的探讨

发展循环经济是转变经济增长方式、加强环保的一项重要措施,也是调整产业结构的有效途径.现在广东钢铁工业的经济运行模式要尽快由"资源-产品-消费-污染排放"单向经济增长模式向"资源-产品-消费-再生资源"的节约型循环经济模式转变,提高钢铁工业循环经济发展水平.     

烧结固硫的热力学研究

烧结生产排放的SO2占整个钢铁工业的60%以上,是引起大气SO2污染的主要污染源,在烧结过程中用固硫剂固硫是降低烧结烟气SO2排放盼有效方法.本文从热力学角度分析了固硫反应的可行性及CaO-SO2-CO系统生成CaS的可行性,研究表明,温度提高,有利于CaS的生成.在烧结过程配加高活性石灰时.游离状态的Ca2+会与硫化物中的S2+反应生成CaS,最终以CaS形式固结在烧结矿中.     

高炉 转炉流程生产过程的硫素流分析

 针对高炉 转炉流程生产过程产生的SO2烟气造成环境污染的问题,以工业代谢理论为基础,应用物质流分析方法,建立了工序的硫素流分析模型。应用该模型,以某钢铁联合企业实际生产数据为例,分析了高炉 转炉生产流程硫的来源和去向,讨论了钢铁生产过程排放的SO2的构成,为进一步研究钢铁工业SO2的减排提供了理论依据。     

时政资讯

贯彻钢铁产业发展政策应重点做好10项工作2005年4月29日,国家发展和改革委在山东济南市召开了加强钢铁产业政策引导发展循环经济现场会。会议认为,国务院原则同意的《钢铁产业发展政策》,对指导钢铁工业加快技术进步、推动结构调整和体制创新,转变增长方式,实现我国钢铁工业由大到强的转变具有重要意义。循环经济是钢铁产业发展政策的重要内容,也是钢铁工业实现可持续发展的必由之路。济钢在节能降耗、废物的资源化利用等循环经济模式方面取得了较好成效,改善了能耗和物耗指标,污染物排放大幅度减少,对钢铁行业发展循环经济进行了有益探索。     

烧结烟气脱硫技术应用现状及发展趋势

烧结生产过程SO2的排放量占钢铁工业总排放量的70%左右,控制该过程的SO2排放是钢铁企业减排工作的重点。主要介绍了烧结烟气脱硫技术及其在国内外的应用现状,并指出了未来烧结烟气脱硫技术的发展趋势。     

低碳炼铁和低碳经济

通过对钢铁工业不同工序和不同流程CO_2排放状况的分析,认为低碳炼铁是钢铁工业发展低碳经济的关键,而节能减排、发展循环经济是低碳炼铁的第一步。并对国外低碳炼铁技术进行了阐述,探讨了我国低碳炼铁技术的发展方向。     

明确认识 加强领导自觉贯彻执行保护环境的基本国策

冶金环境保护经过20多年的努力，主要大中型企业的环境面貌有所改善，在钢铁产量大幅度增长情况下，主要污染物排放总量（除少数污染因子如SO2等外）没有增加，已经呈现出不同程度的减少，成绩是显著的。但是我们应该清醒地看到，钢铁工业环境保护的总体水平不高。对照国家提出的要求，即实现污染物排放总量控制，及到2000年，所有工业污染源排放污染物要达到国家大地方规定的标准，钢铁工业存在的差距是突出的，形势是很严峻的。首先，钢铁工业是国内工业系统中的排污大户．对大气排放的污染物，排放的废水和其中的污染物，以及向环境堆存…     

钢铁工业循环经济实践分析与发展途径

从循环经济理论研究的一般性问题出发，分析了钢铁工业循环经济的实践情况；阐述了钢铁工业循环经济发展的总体思路；设计了多条钢铁工业生态产业链；提出了铁素高效利用、水循环利用、能量梯级利用、固体废弃物资源化利用、信息集成利用的钢铁工业发展循环经济的实施途径。     

温室气体排放与钢铁工业--聚焦COREX(R)技术

采取措施减少温室气体(CO2)排放,对于工业领域、特别是钢铁工业这一最大的能源用户来说正变得日益重要.归纳了评估CO2排放率所必需的因数,比较了不同钢铁生产工艺的CO2排放指标.计算表明,基于COREX(R)工艺的生产路线比传统工艺具有更加满意的结果.     

关于钢铁企业烟尘排放和治理

钢铁工业是高物耗、高能耗,高排放的行业。生产1吨钢材约要消耗23吨自然资源（包括铁矿石、煤炭、熔剂类矿石、水和合金原料等）。钢铁工业消耗的总能耗占全国总能耗的14．71％,工业废水排放占工业废水排放总量的8．53％,工业粉尘排放总量占我国工业粉尘排放总量的15．18％。CO2排放量占全国的9．2％,固体废弃物排放量占全国工业总排放量的17％,SO2排放占全国总排放量3．7％。     

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。