高速铁路用钢轨生产技术

采用铌稀土(BNbRE)钢种,进行了钢的高纯净度、无缺陷连铸坯、高精度轧制、在线检验及相关技术研究,形成高级别钢轨生产工艺.结果表明:生产的钢轨能够满足<时速200公里客运专线60 kg/m钢轨暂行技术条件>的技术指标.     

关于高职教育终身化理念的思考

为了发挥高职院校在终身教育、终身学习、学习化社会的建设中的积极作用.对终身教育及高职教育终身化的理念进行了论述,提出了高职教育终身化的原则和构建终身教育及终身学习的体系.     

Guidelines for clinical use of drugs for involutional osteoporosis

Guidelines for clinical use of drugs for involutional osteoporosis will be released soon in Japan. Seven different types of drugs for osteoporosis are in market for clinical use in Japan. Those includes calcium, estrogens, anabolic steroids, calcitonins, active vitamin D3, ipriflavon, and etidronate. The guidelines recommend to clarify the risk factors in each patient before to start administration of drug. Patients with osteopenia are basically recommended to be followed without any drug treatment, but, patients with osteoporosis are generally recommended to be treated with drug after evaluation of risk factors. After menopause, inhibitors of bone resorption would be recommended as a first choice drug. For monitoring effects of treatment, bone mass measurement is so far the first choice, but bone metabolic markers would be used as well.     

Criteria for selection of patients for emergency portacaval shunt

A computer program analysis of the effect on survival of 74 preoperative factors was performed as part of a prosepctive study of the emergency portacaval shunt in 146 unselected patients with bleeding esophageal varices due to alcoholic cirrhosis. Only ascites, a serum glutamic oxalacetic transaminase level of 100 units or more, and a requirement for 5,000 ml or more of blood transfusion were associated with a statistically significant decrease in survival. However, none of these factors are contraindications to operation because their presence permits a survival rate of 37 to 40%. The only contraindication to emergency portacaval shunt is the combined presence of ascites, jaundice, encephalopathy, and severe muscle wasting, a constellation that was incompatible with survival beyond one year.     

The use of dimethylsulfoxide for fixation of yeasts for electron microscopy

Increasing numbers of young women with ovarian failure and women of advanced reproductive age (> 40 yrs) utilize oocyte donation to treat their infertility. In both groups, women who become pregnant frequently experience multiple gestation, occurring in up to 30% of pregnancies. Advanced maternal age and high-order multiple gestations are associated with an increased risk for obstetric complications. We reviewed the pregnancies of patients with high-order multiple gestations (> or = 3 gestational sacs) with respect to their antepartum course and neonatal outcomes. Mothers were divided into two groups according to age at conception; Group I (> or = 40 yr, n = 20) and Group II (< 40 yr, n = 10). These 30 high-order multiple gestations were found among 127 successful oocyte donation cycles (23.6% of all pregnant patients). Data regarding pregnancy outcomes were gained by chart review and telephone interview. Results demonstrated spontaneous reductions in the number of implantation sites were similar between groups (Group I: 21.4% vs. Group II: 17.6%). Multifetal pregnancy reduction (MFPR) was more often chosen by older women (Group I: 45% vs. Group II: 10%; P < 0.05). Antenatal complications were commonly experienced by both groups (> 80%) as were operative deliveries (> 85%). However, neonatal outcomes were generally good, with only one death occurring in the 79 delivered infants (1.3%). We conclude transferring supernumerary embryos to women undergoing ovum donation places patients at great risk for high-order multiple gestations. These pregnancies are associated with increased antenatal and neonatal complications. Although advanced maternal age is normally an added risk factor, well-screened older patients carrying high-order multiple gestations experienced similar outcomes as younger mothers.     

Predictive factors for outcome of treatment for alcohol problems

Two samples of problem drinkers were followed up 2 and 4 years after they completed treatment. The first consisted of 72 men and 16 women admitted to a program for alcoholics (the inpatient sample), and the second, of 57 men and 35 women who participated in a program of outpatient treatment (the outpatient sample). At start of treatment, the outpatient sample, was generally characterized by a higher degree of social integration and more moderate alcohol problems than those found in the inpatient sample. These differences were sustained during the part of the follow-up period for which comparative data existed. In both samples it was possible to identify subgroups whose alcohol consumption throughout the observation period did not exceed average consumption in a comparative group of the Norwegian population. The most important predictive factors for alcohol consumption in the inpatient sample were degree of social integration, consumption before start of treatment, and sex. In the outpatient sample the most important factors were level of consumption and relative contribution of heavy drinking to the drinking pattern before start of treatment and the client's own goals as regards to alcohol. In both samples there was a close connection between alcohol consumed, total situation, and individual degree of satisfaction. For both groups, less frequent drinking and reduction of heavy drinking were most important for feeling satisfied with the drinking outcome. The therapeutic implications of the qualitative changes in drinking patterns are discussed.     

介绍一种生产冲挤用铝合金坯料的新工艺

哈兹列特铝板带连铸连轧工艺已被成功地用于铝和铝合金冲击挤压用坯料的生产。在对哈氏四个有关用户扫描的基础上，列举了其产品及其用途，并介绍了相关工艺及其优点。     

重轨孔型设计软件的编制

随着计算机在轧钢领域的广泛应用，重轨孔型设计利用计算机技术是今后发展的必然趋势，结合鞍钢大型厂的实际情况，编制了重轨孔型设计软件，应用该软件后，明显地提高了设计工作效率，加快了新产品的开发速度。介绍了该软件的编制方法、系统的功能及程序结构。     

提高引伸计期间核查精度的方法

介绍了在实验室范围内可供参考的简易可行的引伸计期间核查方法,该方法通过用引伸计对同一拉伸试样弹性段进行拉伸测试,用对比测得的弹性模量E来确认引伸计的使用情况,为确认引伸计使用精度状况提供了参考。     

穿孔机出口毛管过渡蓖条的改造

设备前期翻料钩摆臂角度设计错误,导致该处液压缸事故频繁,经改造后,将过渡篦条和中间过渡装置拆除。整体标高再次进行定位,实现穿孔出来的毛管直接过渡到轧机入口,无需中间翻料钩装置,以保证设备的正常运转和生产连续性。     

Preparing for communities of care for child and family mental health for the twenty-first century

In a period of unprecedented change in the American health care system, a strong reform movement for child and family mental health services has developed in the last two decades that provides blueprints and models for the development of communities of care to provide individualized, strength-based services tailored to the needs of each child and family. To bring the spirit and substance of this reform into the twenty-first century, a two-pronged strategy is proposed, focusing on the broad implementation of value-based outcome measures and the development of skilled clinician leaders to ensure the effectiveness of the new delivery system.     

Comparison of Methods for Predicting Incipient Motion for Sand Beds

A comparison of four methods for predicting the incipient motion conditions of a uniform sand bed is presented. The four methods are: (1) the Shields diagram, (2) an empirical approach, (3) a method derived from resolution of rotational forces, and (4) a simplified resolution of rotational forces with a variable lift force coefficient. The four methods are used to predict the incipient motion conditions for 97 experimental runs taken from seven independent experimental flume studies. The effectiveness of predicting depth averaged incipient motion velocity for each of the four methods are compared. The simplified resolution of rotational forces model (4) and Shields method (1) were most successful in predicting the incipient motion velocity [R2 = 0.77, 0.74 and root mean square error (RMSE)=0.18, 0.15, respectively]. The slope of line of best fit for plots illustrating predicted versus measured incipient motion velocity were similar (slope=0.63, 0.65, respectively), illustrating that both methods provide a similarly justifiable prediction of depth averaged incipient motion. The empirical method was the least successful at predicting the measured incipient motion conditions (R2 = 0.49, RMSE=0.41).     

熔体测温中热电偶保护材料的性能探讨

本文从传热学、热力学的角度,分析了在高温氧化工况下,对材料性能的要求,探索选择优良的热电偶保护套管材料,以期有效地测量及控制熔体的温度。     

Genetic Algorithms for the Calibration of Constitutive Models for Soils

This paper presents a study that uses an innovative numerical method called the “genetic algorithm” for material parameter optimization in constitutive modeling. The paper introduces a new scheme, a fitness function, to estimate the error of predicted behavior due to a given set of material parameters. Optimization efficiency of the proposed fitness function is analyzed by changing the selected genetic algorithm parameters. The genetic algorithm and the new fitness function were found to be capable of optimizing material parameters of complex constitutive models.