一种可切削玻璃陶瓷的压痕断裂特性

将断裂韧性测试的压痕方法与压痕弯曲方法相结合，独立地分离出了压痕残余应力因子ｘ，使其成为可测参量，并建立了压痕一压痕弯曲的断裂韧性测试方法．将这种方法应用于一种可切削玻璃陶瓷的测试，获得的Ｋ１ｃ值为Ｋ１ｃ＝２．０３ＭＰａ·ｍ１／２，与单边切口法（ＳＥＮＢ）获得的Ｋ１ｃ值有较好的一致性．测得的残余应力因子Ｘ＝０．０９３，符合Ａｎｓｔｉｓ经验公式的预测．     

J-199热熔胶膜的研制

讨论了不同VA含量不同熔体指数的EVA和各种增粘剂对热熔胶膜耐热性、软化点、剪切强度、拉伸强度、剥离强度等性能的影响。通过采用不同材料试验和配方的筛选，研制出一种90℃剪切强度0．07MPa、拉伸强度0．47MPa、耐热性好、粘接强度高的热熔胶膜，从而拓宽了热熔胶的使用范围。     

弹簧钢棒线材质量投诉的分析研究

为分析研究某特钢厂用户投诉的原因及存在的问题，统计了其两年间的弹簧钢棒线材用户质量投诉，从缺陷类型及生产过程控制进行了分析，重点对多起断裂原因不明的投诉进行了深入的失效研究。结果表明，弹簧钢生产厂在设备工艺、过程控制和管理中存在很多不足，加上用户的使用工艺、材料的内外质量和规格等综合因素导致了材料的断裂失效。     

T cells of the human intestinal lamina propria are high producers of interleukin-10

BACKGROUND: The transmission of hepatitis A virus (HAV) has been associated with the use of a number of solvent/detergent-treated factor VIII concentrates and possibly a factor IX concentrate. These reports have emphasized the necessity of using virus-inactivation methods for plasma products that are capable of inactivating nonenveloped viruses such as HAV. STUDY DESIGN AND METHODS: A simple, highly accurate titration procedure for HAV, which allows extensive kinetic investigations of virus-inactivation procedures, has been developed. This system has now been used to evaluate the efficacy of vapor heating in inactivating HAV after the addition of the virus to a range of human plasma products. RESULTS: It was demonstrated that HAV was significantly more thermostable than other picornaviruses, which reinforced the fact that such viruses cannot be used as model viruses for HAV-inactivation studies. A one-step vapor-heating procedure was demonstrated to inactivate between 5.9 and > 6.3 log10 of HAV in different products. A two-step vapor-heating procedure had the capacity to inactivate between > 8.7 and > 10.4 log10 of HAV. Both procedures were more effective in inactivating HAV than was the pasteurization procedure used for virus inactivation in human albumin solutions. CONCLUSION: These data demonstrate the efficacy of vapor heating in inactivating high-titer HAV after the spiking of plasma products with virus. This study confirms and explains the results of controlled clinical trials and long-term clinical usage with respect to the lack of HAV transmission by such vapor-heated products.     

Effects of passive tilt and submaximal exercise on spectral heart rate variability in ventricular fibrillation patients without significant structural heart disease

It has been shown that tilt and exercise elicit significant changes in autonomic activity in normal subjects and that submaximal exercise causes a greater reduction in heart rate variability (HRV) in animals susceptible to ventricular fibrillation (VF). Whether there is an abnormal HRV response to tilt and exercise in patients at risk of sudden cardiac death (SCD) remains unknown. Short-term HRV before and during passive tilt and exercise was studied in 12 survivors of out-of-hospital cardiac arrest with documented VF and compared with 12 age- and sex-matched normal controls. No patient had significant structural heart disease or left ventricular dysfunction. HRV was computed as total-frequency (TF, 0.01 to 1.00 Hz), low-frequency (LF, 0.04 to 0.15 Hz) and high-frequency (HF, 0.15 to 0.40 Hz) components. There was no significant difference between normal controls and SCD survivors in HRV before or during tilt or submaximal exercise testing. The HF component was significantly decreased during tilt compared with that in the supine position in both normal controls (5.85 +/- 0.61 vs 5.08 +/- 0.95 In(msec2), p = 0.005) and patients (5.58 +/- 1.49 versus 4.74 +/- 1.18 In(msec2), p = 0.003). There was again no significant change in the TF or LF components during tilt in either patients or controls. All frequency components were significantly decreased during submaximal exercise testing in both patients and controls. However, there was no significant difference in any of these tilt- and exercise-induced changes in HRV between normal controls and SCD survivors.(ABSTRACT TRUNCATED AT 250 WORDS)     

压力传感器静态检定装置的测量不确定度

本文根据压力传感器（静态）国家计量检定规程，对压力传感器静态检定装置进行误差分析，得出该装置的测量不确定度。最后，通过实例说明实际测量不确定度与理论分析相符合。     

利用氧化铁皮烧结矿做炼钢氧化剂的探讨

用氧化铁皮研制烧结放代替铁矿石做炼钢氧化剂经试验表明，其理化性能均优于铁矿石，可替代铁矿石作为炼钢的氧化剂。氧化铁皮的开发利用，综合效益显著。     

富集孢粉化石的一种方法

本论述了孢粉，沟鞭藻化石与矿物颗粒相互分离的方法，并与传统的氢氟酸冷处理方法进行实验对比。结果表明，该方法摒弃有毒重液，提高了化石收获率。     

NexGen的Nx586－Pentium的又一个挑战者

本文简单介绍ＮｅｘＧｅｎ公司最新设计出的Ｎｘ５８６ＣＰＵ。它是一种８０×８６兼容的处理器，文中介绍了它的微体系结构，ＲＩＳＣ８６指令等。     

太阳能热水器内表面电刷镀锌

用电刷镀的方法,对尺寸为2000mm×1000mm×0.8mm 的 A_3钢板电刷镀锌保护层;并对影响镀锌层质量的因素进行了充分的研究。