前进中的我国硬质合金工业——庆祝中华人民共和国成立四十周年

<正> 今年是新中国诞生四十周年。我国硬质合金工业随新中国的诞生而兴起,随新中国的成长而发展,从无到有,由小到大。时至四十年后的今天,我国硬质合金工业已形成了从设计、设备制造、教育、科研、冶炼、加工相互配套的工业生产体系;硬质合金总产量仅次于苏联和美国,占世界第三位。我国硬质合金工业在发展过程中,经历了两次引进改造。早在第一个五年计划期间,被称为工业牙齿的硬质合金,作为156项重点工程之一,全套引进了苏联的硬质合金生产技术和工艺装备,在当时来说,我国已掌握了世界先进水平的技术和装备,并导致了六十年代     

科技创新支撑乌山铜钼矿工程建设及生产

乌山铜钼矿是中国在高纬度地区开发建设的第一个大型有色金属项目,是中国黄金集团有限公司一次性投资最多、规模最大、技术装备水平最高的非金项目,被誉为"中国铜工业的新坐标"。在一期工程建设中,选矿厂采用SABC碎磨工艺、HMR半自磨区间加球法等多项国内乃至国际的先进技术,打破了国内矿山传统的工艺流程,实现了与国际矿业先进技术的完美对接。一期工程选矿厂从带料试车开始,仅用2个月的时间就达到了3万t/d的设计处理能力,以科技创新支撑乌山铜钼矿的建设及快速达产。     

科研成果鉴定组讯

新型结构电解槽工业试验研究项目通过鉴定 2009年4月24日，由中国铝业股份有限公司郑州研究院和中铝国际工程有限责任公司共同完成的“新型结构电解槽工业试验研究”项目通过了中国有色金属工业协会的科技成果鉴定，该项技术为我国具有自主知识产权的原创性节能铝电解技术，整体技术达到了国际领先水平。     

苏联将大规模引进中国劳动力

据报道,苏联决定从1989年夏天开始,大规模接纳中国工人参加开发各类资源和工业建设。苏联官员说,作为中苏劳动分工的一环,将根据各个工程的性质来引进中国劳动力,苏联拥有丰富的资源和必要的工业技术力量,两国间经济互相补充有非常广泛的领域和前途。目前,中苏已开始了地方间小规模的劳动力交换,黑龙江     

中国恩菲又一科技成果达到国际领先水平北大核心

中国有色金属工业协会组织专家组成员在缅甸达贡山镍矿项目现场,对中国恩菲与中国有色集团共同完成的"红土镍矿生产高品位镍铁关键技术与装备大型化研究"项目进行了成果鉴定。鉴定结论是:整体技术达到国际领先水平。达贡山镍矿工程是中国恩菲承担的在国内外有重要影响的大规模红土矿开发和镍铁冶炼综合工程。     

攀长钢万吨钛材生产基地规划

本文介绍了攀钢集团四川长城特殊钢股份有限公司万吨钛材生产线的建设方案,说明了该项目具有国际先进水平的装机水平,具有资源、技术和成本等优势,产品多样化,质量高,具有很强的竞争力.并指出该项目的建设将提高我国钛工业的整体水平,有利于我国的经济建设和国防建设,逐步改变世界钛材生产的格局,提高中国钛材生产的国际地位.     

中国恩菲又一科技成果达到国际领先水平

<正>中国有色金属工业协会组织专家组成员在缅甸达贡山镍矿项目现场,对中国恩菲与中国有色集团共同完成的"红土镍矿生产高品位镍铁关键技术与装备大型化研究"项目进行了成果鉴定。鉴定结论是:整体技术达到国际领先水平。达贡山镍矿工程是中国恩菲承担的在国内外有重要影响的大规模红土矿开发和镍铁冶炼综合工程。工     

国家计委批准株洲硬质合金厂老系统技术改造

<正> 继“七五”计划期间株洲硬质合金厂顺利完成300吨硬质合金引进技术改造后,目前国家计委又批准立项,对该厂硬质合金老系统进行全面技术改造。该厂属国家“一五”计划期间156项重点工程之一,硬质合金生产的工艺和装备基本上是沿袭苏联援建的模式。随着硬质合金工业的不断发展,株洲厂老系统与当代世界先进水平的差距不断扩大,必须进行全面技     

中铝国际获得3项“鲁班奖”

<正>近日,中铝国际工程股份有限公司所承建的三项工程项目荣获中国建筑业协会评选的2018—2019年度中国建设工程鲁班奖,项目分别是越南仁基650 kt/a氧化铝项目、普朗铜矿一期磨浮工程和滇西应用技术大学总部建设项目。越南仁基650 kt/a氧化铝厂是越南振兴经济的国家重点项目,项目采用国际先进水平的"拜耳法"生产工艺和自主知识产权的节能高效技术装备,运用了大型搅拌槽高性能搅拌桨技术1项,新蒸汽冷凝水与二次蒸汽冷凝水分别自蒸发工艺等专利     

矿冶总院节水技术达国际领先

由北京矿冶研究总院和中金岭南有色金属股份有限公司韶关冶炼厂共同完成的“大型铅锌冶炼企业节水技术开发”项目日前通过了中国有色金属工业协会科技成果鉴定。专家组认为，项目成果填补了国内空白，在韶关冶炼厂进行了工程示范，处理效果好，工业水重复利用率高，运行稳定，实现了污染物的大幅削减，其整体技术达到国际先进水平，其中“高浓度泥浆法（HDS）”技术国际领先。     

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。