低碳冷加工钢种的时效倾向探讨

本文介绍了一种低碳钢冷加工成形后，在使用中发现有时效脆化现象。并对此进行时效倾向分析。     

着力实践循环经济促进企业可持续发展

循环经济是对物质闭环流动型经济的简称,它是坚持可持续发展的科学发展观,按照清洁生产方式,对能源及其废弃物实行综合利用的生产活动过程,其本质是一种生态经济、高效经济、资源闭环利用型经济,是新型工业化的重要载体,是环境保护、资源节约型经济的发展模式.     

Embrittlement of copper due to segregation of oxygen to grain boundaries

The tensile and creep properties of oxygen free OF- and oxygen saturated OS-polycrystalline copper have been investigated in the temperature range 25 to 500 °C. Oxygen increases the yield strength by a factor of 2 or 3, by solid solution hardening, and for coarse-grained copper, causes a severe embrittlement, particularly under creep conditions. Both direct and indirect evidence indicate that the embrittlement is caused by the segregation of oxygen to the grain boundaries in copper, thus promoting grain boundary decohesion and intergranular fracture. Auger electron spectroscopy is used to indicate the presence of oxygen at the grain boundaries in OS-Cu. The embrittling effects of oxygen are reversible in the sense that both tensile and creep ductility are restored when oxygen is removed.     

对如何提高凿岩爆破质量的探讨

较详细地介绍地下开采过程中中深孔落矿工艺的应用和实践中应注意的问题，通过对中深孔设计参数的改进出口，爆破技术的提高，严把施工质量关，给西安里铁矿创造了良好的经济效益。     

Providing information to carers of people admitted to psychiatric hospital

Relatives have an increasingly important role in providing care in the community to people with mental health problems, yet numerous studies have highlighted a lack of support from health care professionals. GEOFF BRENNAN describes the findings of a study to investigate the information provided to relatives of patients in one trust, and suggests solutions to the ethical and professional dilemmas raised.     

注重环境形象 尽展企业风采

阐述中厚板卷厂在建厂初期，如何结合自身的特点，从建立环境形象入手，进行“塑形工程”，打造良好的企业形象。     

Application of the duty to protect to HIV-positive patients.

The spread of acquired immune deficiency syndrome (AIDS) has led to new questions regarding the limits of confidentiality in the psychotherapeutic relationship. We describe the duty-to-protect doctrine that has arisen out of Tarasoff and subsequent court decisions and apply it to situations in which human immunodeficiency virus (HIV)-positive patients may pose a health threat to others. No courts have as yet applied the duty to protect to cases of HIV infection. We conclude that although parallels exist between Tarasoff and HIV-infected patients, following good clinical practices can significantly reduce instances in which a duty to warn might arise. We recommend statutory solutions that would permit but not require warning potential victims of the HIV infection. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Relationship of family schema to family adaptation to brain injury

The relationship between family schema and family adaptation to brain injury was investigated. Participants were 87 primary caregivers of persons with brain injuries in Wisconsin who are part of a comprehensive, longitudinal study of family adaptation to having a member with a brain injury. Stepwise multiple regression of variables measuring family schema on family adaptation indicated that manageability and meaningfulness were predictive of family adaptation. Thus the hypothesis that family adaptation can be predicted from variables measuring family schema was supported. Family intervention and research implications are discussed.     

Mitigation of Damages to Electric Utilities Due to High Winds

Extreme winds, hurricanes, and tornadoes produce significant damage to electrical transmission and distribution line structures. The damage produces loss of power to the affected communities for a variable length of time, depending on severity of damage. Most institutions whose operations would be life threatening in the event of power failure have emergency power. However, loss of power to both residences and businesses can have economic impact on the community in the form of temporary housing shortages and loss of business. Utility companies seem to cope with wind damage fairly well, following risk management procedures in designing for wind and in providing alternate routing for distribution lines. However, continuing research and developments are needed to keep abreast of the problem.     

Providing information to carers of people admitted to psychiatric hospital

Relatives have an increasingly important role in providing care in the community to people with mental health problems, yet numerous studies have highlighted a lack of support from health care professionals. GERARD LEAVEY and colleagues describe a study to investigate the information provided to relatives of patients in one trust, and suggest solutions to the ethical and professional dilemmas raised.     

Active Thrust Due to Backfill Subject to Lines of Surcharge

The thrust on retaining walls, when a set of lines of surcharge act on the backfill, is often calculated using analytical solutions partially based on the elasticity theory. Coulomb’s method, which is able to give a numerical solution, is, in contrast, seldom used. This technical note presents the analytical solution of the active thrust on retaining walls based on the approach of Coulomb. It is also usable in seismic conditions, when analyzed by the pseudostatic method of Mononobe and Okabe.     

Design of experiments to maximize power relative to cost.

Relationships of power of (Fisher) F tests to expected mean squares, E(MS), in the analysis of variance is discussed. While components of variance in the E(MS) are largely a function of nature, the coefficients associated with them are matters of experimental design. Frequently a different cost is associated with each type of experimental unit represented by the different coefficients. It is possible to maximize power relative to cost by optimal allocation of available resources among various types of experimental units—for example, numbers of Ss, duplicate measures, replicates, etc. A simple index of relative power involving the ratio of the estimated F ratio to F alpha is proposed as useful in choosing the allocation of resources most likely to yield significant results. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

降低100 t转炉铁钢比的途径

根据国内某炼钢厂100 t转炉的入炉金属料参数和冶炼相关参数,运用物料平衡、热平衡计算方法,对转炉的物料平衡、热平衡进行计算,算出不同入炉铁水量及温度下的合理废钢加入量、出钢量和铁钢比.通过分析影响铁钢比变化的两个主要影响因素:铁水人炉温度和铁水入炉量,来研究铁钢比与废钢加入量、出钢量之间的关系.提出100 t转炉降低铁钢比的具体措施,供相关炼钢厂参考.     

Contribution of beta-lactamase production to the resistance of mycobacteria to beta-lactam antibiotics

Changes in motor function were assessed in male rats after injecting graded doses (100, 200, 400, and 800 mg/kg, IP) of ammonium chloride and ammonium acetate. The effects were correlated with the concentrations of ammonia and glucose in the brain and blood. Spontaneous motor activity and motor coordination were inhibited after injecting 100 and 200 mg/kg, whereas with 400 and 800 mg/kg the animals exhibited convulsive movements. A dose-dependent increase was found in the concentrations of ammonia and glucose in both blood and brain. These were restored, 25 min after treatment, to control levels in the blood and not in the brain. A correlation was found between the time courses of inhibitory motor events and a rise in brain ammonia levels. Convulsant action of ammonium salts was accompanied by a marked elevation of ammonia and glucose concentration in the brain. The findings suggest that detoxication of diffused ammonia is a rate-limiting process in the brain and that ammonia, at toxic concentrations, decreases glucose utilization in the brain, resulting in an inhibition of motor function. A very high concentration of ammonia in the brain, although inhibiting glucose utilization, produces clonic convulsions probably by activating directly the motor neurons.     

Response of spinal cord capillaries of white rats to exposure to noise

Changes in diameters of blood capillaries of the white rat spinal cord, peculiar changes in volume and metabolic surface of capillaries in the cervical part of the spinal cord were studied under the effect of noise (90-100 db, 2 h daily, for 2, 4 and 8 weeks). Restorative period was started in 4 and 16 weeks after the experiment was stopped. A considerable narrowing of the capillary lumen was found in the test animals comparing to the normal state. The investigations performed demonstrated that the quantitative changes in the capillary indices depended on the noise duration and were considered as gradual development of adaptive-compensatory reaction of the vascular system to noise. The changes mentioned, however, were not irreversible, as during the restorative period a gradual widening of the capillary diameters was observed. Nevertheless, the "rest" lasting for 16 weeks was not enough for the capillary bed of the spinal cervical part to restore its normal indices.