C616卧式车床的数控化改造

采用先进制造技术是制造企业提高市场竞争力的重要选择。随着计算机集成技术智能制造、网络制造等新的概念和方法的研究与发展,网络机床数控系统将成为各种先进制造环境的基本单元。发展数控技术已成为振兴我国机械工业的重中之重。     

信息化对制造业的影响综述

信息技术是一种新型技术。信息技术和制造业相互依存、相互促进是一种发展趋势。信息技术对制造业的影响主要有:信息化在制造业的产品开发设计技术方面带来的进步,这主要包括计算机辅助技术;信息化在制造业的生产管理技术方面带来的进步,主要包括企业制造资源计划系统及产品数据管理;信息化在制造业的制造方式上带来的进步,主要包括柔性制造、计算机集成制造等先进制造技术。     

钢铁制造流程动态运行要素的认识与实践

 深入认识钢铁制造流程的动态运行特征是实现流程动态-有序、协同-连续运行状态管控的基础。基于对钢铁生产流程特征的分析,阐述了“流、流程网络与运行程序”作为钢铁制造流程动态运行3大要素的特征及其数学描述,明确了运行程序是进行物质流、能量流在以流程网络为基础的网络空间中运行优化的调控手段,以及构建铁素物质流及能量流在流程网络上的动态运行优化模型是实现钢铁制造流程高效优质低耗低成本运行的有效途径。对于钢铁制造企业,提出了以生产计划调度优化模型为核心的运行程序优化技术,通过优化模型形成的生产计划调度指令可引导制造流程运行状态的整体优化,实现生产资源的合理优化配置和能源利用效率提升。     

鞍钢攻克中国核电装备材料“卡脖子”难题

正日前,鞍钢成功实现四代核电600 MW示范快堆项目316H奥氏体不锈钢产品开发,并完成首批合同供货,解决了该产品从无到有的"卡脖子"难题。鞍钢因此成为全球唯一一家全部依靠自身装备生产该产品的企业。随着世界各国经济发展和环境恶化压力,建造核电、利用核能已成为未来10至20年的重点。中国在核电开发、建设方面已取得了重大进展,三代核电技术达到世界先进水平,四代核电技术达到国际     

实施战略联盟是企业增强竞争力的重要手段

复杂多变的市场竞争，催生了企业之间战略联盟的出现，目前宝钢、首钢和武钢的战略联盟已在我国市场上迈出了第一步，而国际市场上战略联盟之风势头大增，令人刮目相看。通过考察了解，战略联盟能给成员企业常来的好处，大致有以下几个方面：１．通过战略联盟在成员企业之间进行分工合作共同开发创新，既能加快产品开发速度，缩短产品开发周期；又能提高产品质量，减少设计缺陷，优化产品性能，提高工艺规划和加工过程的合理性，从而做到优化产品制造质量。２．通过生产计划应用网络技术，优化资源配置和物流运作系统的管理，实现柔性制造和…     

中国钢铁工业协会对主要产品制造成本前三名先进企业给予表彰

日前,中国钢铁工业协会以钢协[2007]169号文,对荣获2006年度十项主要产品制造成本先进企业在全行业进行通报表彰。2006年大中型钢铁企业在成本增支因素不断增加的情况下,深入开展"对标挖潜"、主要产品制造成本创先进活动,成功地抑制了钢铁生产制造成本的过快增长,为提高经济效益和提升企业市场竞争力起到了     

德国工业4.0、中国制造2025与智能冶金浅议

针对德国工业4.0、中国制造2025等热门话题,简要介绍了其战略要点与目标,分析了两者之间的关系,提出了冶金工业智能制造的任务。德国工业4.0和中国制造2025的核心内容是综合应用网络技术,实现智能制造与个性化生产,旨在适应制造业与用户合作共赢的需求和社会人口结构的变化。先进基础工艺和产业技术基础等基础能力薄弱是制约中国冶金工业智能制造发展的瓶颈。冶金工程专业高等教育和科学研究工作者的任务是通过学习和综合应用先进的计算机与网络技术,将冶金制造技术的基础研究提升到更高的水平,同时通过与生产企业密切合作开发出各种过程应用软件与工具,培养出更多高素质应用型人才。     

2016第四届钛产业先进技术交流会征文通知

正为持续推进我国钛资源综合利用新工艺、新技术、新装备、新产品研发与创新,提高利用效率、提升利用价值,促进钛产业清洁生产高端制造,提升我国钛工业在全球产业格局中的竞争能力,拟于2016年8~9月在四川省成都市召开"2016第四届钛产业先进技术交流会",本次会议由钒钛资源综合利用产业技术创新战     

诱人的巨大市场,美好的合作前景——跨国公司在华的新手笔

中国社科院的一项最新调查显示,"十二五"开局以来,中国在跨国公司未来战略中的地位进-步提升,跨国公司不仅继续把中国作为其面向全球市场的制造基地,而且计划大力开拓中国市场,将更多的研发活动、区域总部、先进服务业和高端制造等高附加值的产业活动向中国转移.     

它山之石 可以攻玉

改革开发以来,随着我国经济的发展,钢铁产业也取得了突飞猛进的发展,到2011年粗钢产量已经达到6.84亿吨,占全球粗钢产量的45%。在我国钢铁产业整体迅猛发展的同时,以宝钢、鞍钢、武钢以及河北钢铁集团为代表的中国钢铁企业也迅速发展壮大,特别是企业规模呈现迅速扩大的态势,其中宝钢、河北钢铁集团、武钢集团的粗钢产量已经在全球钢铁企业的粗钢产量排名中位居前5位。但是,在生产规模迅速扩大的同时,也应该看到我国钢铁企业与国外先进企业相比还存在不小差距,特别是标准制定、生产技术和产品开发、产品质量、管理体系建设、企业发展理念确定和实施等方面。表现     

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。