轴承车床实用套状接料器设计

ＨＺＣ２０－Ｚ系列轴承专用自动车床采用的液压驱动、齿轮齿条传动的套状接料器具有制造简单，结构尺寸小，接料准确，寿命长和效率高等优点，并通过分析计算和实践应用验证了其设计的正确性。附图３幅，参考文献３篇。     

轴承在床实用套状接料器设计

ＨＺＣ２０－Ｚ系列轴承志自动车床采用的液压驱动，齿轮齿条传动的套状接料器具有制造简单，结构尺寸小，接料准确，寿命长和效率高等优点，并通过分析计算和实践应用验证了其设计的正确性。     

微区电阻测试方法及新测试仪研制

文章对国内外开展微区薄层电阻测试的方法进行了综述，特别对改进范德堡四探针技术方法的测试原理、测试过程与测试结果进行了论述与分析，对微区电阻测试方法的进一步发展提出了一种可操作的方法，并研制出新型四探针测试样机。     

山迪亚国家实验室半导体桥(SCB)应用研究概述

山迪亚国家实验室研究的半导体桥（ＳＣＢ）是一种成熟的技术，现由山迪亚用户用于不同用途。由于需要为系统提供体积小、重量轻、成本低，并要求少量电能作用的爆炸组件，由于本报告的目的，我们规定爆炸组件是发火装置和爆炸元件的组合。为此，由于常规点火系统不能满足用户严格的尺寸、重量和能量要求，我们设计并正在研究包括从山迪亚应用的以烟火点火器的ＳＣＢ应用。在本报告中，我们介绍了为用户设计的具有具体实例系统的ＳＣ     

长壁工作面采煤机组实现大功率高产高效

长壁工作面采煤机组实现大功率高产高效【美】Ｊ·ＡＯｒｇａｎｉｓｅａｋ等编者按这是一篇关于美国（实质上也是对全世界）长壁工作面采煤机组十多年来技术进步和今后技术发展态势的综述。我国是以长壁式开采体系为主导的产煤大国，综采、高档普采都发展很快，因此，我们...     

世界稠油开采现状及发展趋势

本文是根据１９９５年６月在加拿大卡加里召开的国际稠油研讨会以及同年１０月和次年３月在北京召开的中国石油天然气总公司稠油开发工作会和“九五”稠油开采新技术论证会等方面材料编写的综述文章。     

Automated analysis for scintigraphic evaluation of gastric emptying using invariant moments

This study introduces a method for automated analysis of the standard solid-meal gastric emptying test. The purpose was to develop a diagnostic tool to characterize more reproducibly abnormalities of solid-phase gastric emptying. The processing of gastric emptying is automated using geometrical moments that are invariant to scaling, rotation, and shift. Twenty subjects were studied. The first step was to obtain images of the stomach using a nuclear gamma camera immediately after the subject had eaten a radio-labeled meal. The second step was to process and analyze the images by a recently developed automated gastric emptying analysis (AGEA) method, which determines the gastric contour and the geometrical properties include such parameters as area, centroid, orientation, and moments of inertia. Statistical tests showed that some of the moments were sensitive to the patient's gastric status (normal versus abnormal). The difference between the normal and abnormal patients became noticeable approximately 1 h after meal ingestion.     

Optimization of signal detection in SPECT

Parallel-hole collimators of varying design are discussed, using the display signal-to-noise ratio of R.F. Wagner et al. (Med. Phys., vol.6, p.83-94, 1979) to obtain contrast-detail diagrams and analytical expressions for the signal-to-noise ratio in SPECT (single-photon-emission computed tomography). It is concluded: (1) that the detectability of deeply embedded small objects (more than ~10 cm deep) may be improved only slightly by improvements in the resolution and geometric efficiency of parallel-hole collimators; (2) that a long-bore collimator outperforms a low-energy general-purpose collimator for objects smaller than ~2 cm, but only to a minor degree; and (3) that for improvement of small object detectability by SPECT, the most fruitful technological pursuit would probably involve development of focused collimators.     

Effect of added water, sodium erythorbate and storage time on the functional properties of prerigor beef preblends in a model system

Singular and combined effects of added water, sodium erythorbate and storage time on salt soluble protein extractability, bacteriological and chemical characteristics of preblended hot-boned beef were evaluated. Waterholding and gel forming capacities of preblended hot-boned beef containing either 0, 10 or 20% added water were determined. Significant interactions between added water level and storage time on microbial counts and between sodium erythorbate level and storage time on thiobarbituric acid values and residual nitrite levels were noted. The presence of sodium erythorbate resulted in a more (P < 0·05) rapid rate of nitrite disappearance, but it did not affect (P > 0·05) microbial counts. Salt-soluble protein extractability was not affected (P > 0·05) by added water, but more protein could be extracted with increasing storage time. A trend existed to suggest that the presence of added water in the meat preblends slightly improved the gel formation and waterholding capacities.