Experimental study of convective heat transfer response to relative humidity in source arrays

Experiments were performed to investigate the effect of relative humidity on heat transfer characteristics in source arrays for different airflow velocities. The source arrays were heat-generating, block-like elements affixed to an insulation substrate. Nusselt number distribution of components exhibited stronger dependence on velocity and same dependence on the row number and relative humidity. The correlations for the effects of Reynolds number and relative humidity on Nusselt number in different regions are presented. The fittness of the correlations are indicated from a comparison with experimental data.     

时间分幅全息技术及其应用

本文介绍了一种对研究发动机燃烧过程有着重要应用价值的实验技术－时间分幅全息技术，本文就该技术中常常出现的重影问题做了重点研究，通过分析重影出现的根源，找到了一种消除重影的新方法，文章还举例说明了该技术在液体破碎机理问题保研究中的应用。     

Exact solution of elasto-plastic stresses in a metal-matrix composite beam of arbitrary orientation subjected to transverse loads

An analytical elasto-plastic stress analysis is presented for a metal-matrix composite beam of arbitrary orientation subjected to a single transverse force applied to the free end of the beam and a uniformly distributed load. The material is assumed to be perfectly plastic in the elasto-plastic solution. A composite consisting of stainless-steel-reinforced aluminum was produced for this work. Sample problems are given for various orientation angles. Elastic, elastoplastic and residual normal and shear stresses are calculated. The location of the elasto-plastic boundary of the beam is obtained according to the x coordinates of the beam.     

32位单片机80960KB中断系统硬件资源分析

本文主要介绍３２位单片机８０９６０ＫＢ中断系统的硬件结构及其运行机理。     

基于语法的元程序设计系统的自动生成技术

本文提出一种基于语法的元程序设计系统的自动生成技术，并开发了一个元程序设计系统的自动生成系统Ａ－ＭＰＳ。元程序设计系统是一种以程序作为操作对象的有效的程序设计工具，并具有广泛的应用。     

Primary prevention of malignant melanoma in the Stockholm Cancer Prevention Programme

The relation between intracoronary thrombus and endothelin-1 (ET-1) was studied. In a canine model, acute myocardial infarction (MI) was induced by coronary occlusive thrombus produced at a mock atheromatous plaque. Blood samples were collected from the aorta (A) and coronary vein (V). Twenty-eight open-chest dogs divided into three groups were studied. Group I (n = 15): acute MI was induced by coronary occlusive thrombus, and thrombolysis was obtained by urokinase two hours after MI. Group II (n = 8): nonocclusive thrombus was produced without inducing MI. Group III (n = 5): coronary artery was ligated for two hours and reperfused by release of ligation. In Group I, ET-1 was significantly increased after MI in A and V, and ET-1 in V was significantly more elevated than in A during thrombolysis, suggesting ET-1 production in the coronary vessels by thrombolysis. In Group II, ET-1 increased slightly during thrombus formation, but there was no difference in A and V. In Group III, ET-1 was elevated significantly after MI without A and V difference. These results indicate that there is no detectable ET-1 production with coronary thrombus formation, whereas coronary ET-1 production is detected during thrombolysis, most probably because resolved thrombus releases a more potent stimulus to ET-1 production.     

Influence of age on serum prostate specific antigen concentration

322 men who had not prostatic diseases were selected at random for defining the characteristics of serum prostate specific antigen (PSA) in order to use PSA more appropriately in detecting clinically significant prostate cancer. The serum PSA concentration is correlated with patient age (r = 0.301; P < 0.0001), PSA is increased with age. The recommended upper limits (mean +2 standard deviations) for serum PSA for men aged 20-49 years was 2.71 ng/ml; for 50-59 years, 5.01ng/ml; for 60-69 years, 6.05 ng/ml; and for greater than or equal to 70 years, 7.92 ng/ml. Our findings led to proposals for using age-specific PSA reference range instead of a single reference range for men of all age groups. These age-specific reference ranges have the potential to increase the specificity of using PSA for detecting prostate cancer.     

Postural and symptomatic improvement after physiotherapy in patients with dizziness of suspected cervical origin

OBJECTIVE: To assess postural performance in patients with dizziness of suspected cervical origin in whom extracervical causes had been excluded, and to assess the effects of physiotherapy on postural performance and subjective complaints of neck pain and dizziness. DESIGN: Prospective, randomized, controlled trial. SETTING: Primary care centers and a tertiary referral center. PATIENTS AND SUBJECTS: Of 65 referrals, 43 patients were excluded because extracervical etiology was suspected. Of the remaining 22 patients, 17 completed the study (15 women, 2 men, x age 37 yr, range 26-49). The controls were 17 healthy subjects (15 women, 2 men, x age 36 yr, range 25-55). INTERVENTION: Physiotherapy based on analysis of symptoms and findings, and aimed to reduce cervical discomfort. Patients were randomized either to receive immediate physiotherapy (n = 9), or to wait 2 months, undergo repeat measurements, and then receive physiotherapy (n = 8). MAIN OUTCOME MEASURES: Posturography, measuring velocity and variance of vibration-induced body sway and variance of galvanically induced body sway. Subjective intensity of neck pain (Visual Analog Scale ratings, 0-100), intensity and frequency of dizziness (subjective score 0-4). RESULTS: The patients manifested significantly poorer postural performance than did healthy subjects (.05 > p > .0001). Physiotherapy significantly reduced neck pain and intensity and the frequency of dizziness (p < .01), and significantly improved postural performance (.05 > p > .0007). CONCLUSIONS: Patients with dizziness of suspected cervical origin are characterized by impaired postural performance. Physiotherapy reduces neck pain and dizziness and improves postural performance. Neck disorders should be considered when assessing patients complaining of dizziness, but alternative diagnoses are common.