国外智能传感器的发展动向

智能传感器的概念是美国宇航局在开发宇宙飞船的过程中首先提出的。宇宙飞船中含有各种各样的传感器，所获取的倍号数据量极其庞大。因此，处理这些数据必须由计算机来承担。于是把传感器和计算机或微处理器的结合体叫作智能传感器。目前，智能传感器虽然不算太多，但是发展却十分迅速。自从十年前推出智能传感器产品以来，至今已获得极其广泛的应用。这种传感器不但在工业和过程控制中获得广泛应用，而且也将用于汽车、航空航天、医学和消费品市场。智能传感器之所以能迅速发展，其原因是先进的硅检测元件迅速发展和先进的信号处理集成电路…     

钢在饱和CO2的NaCl盐水中腐蚀特征

钢材在无氧的CO_2水溶液中形成一种FeCO_3腐蚀产物层,对钢材的进一步腐蚀有一定的保护作用。其保护性依赖于环境因素和钢材的本质。本文介绍了FeCO_3的结构特征,并讨论了其组织对腐蚀机理的影响。对FeCO_3腐蚀层的检验表明,腐蚀层有两种结构,且其厚度的变化依赖于钢材的显微组织。     

设有蓄水池的船闸充水系统的水力计算

对配有节水池和错船渠的两种类型的船闸，在几个节水池同时工作时，推荐采用船闸闸室充水和泄水过程数学模型的计算方法，此法无需做物理模型便可选定船闸供水系统部件的结构及其尺寸，这对现有同类型船闸顺利转入新的运用方式至关重要。     

光纤复合架空地线光缆（OPGW）在伊河电网工程建设中的应用

针对OPGW在某电网中的应用,分析了OPGW的特性、功能以及在设计、施工过程中应注意的问题,为今后工程应用提供一些经验。     

切分轧制技术的发展与应用

简要回顾了近年来切分轧制技术的发展过程，着重介绍了几种典型的切分轧制工艺及其应用，并分析了该技术的发展动向。     

Progress towards using the speed of ultrasound for beef leanness classification

Following the observation of a high correlation between the reciprocal of the speed of ultrasound and lean proportion in beef carcasses, commercial equipment (VOSI) was developed and its performance alongside a smaller assembly (Mini G) is reported. The speed of ultrasound was measured through six sites on beef carcasses within 1 h of stunning: three sites with VOSI and three sites with Mini G. Sides were also scored for fatness and conformation using the EAAP system, and subcutaneous fat depth was measured at 25,50 and 75% of the width of M. longissimus thoracis from the midline at the last rib. All sides were dissected into subcutaneous fat, intermuscular fat, muscle and bone. The reciprocal speed averaged over the three VOSI sites (RV346) was the best single predictor of the proportion of lean in the side. Multiple regression analyses, in predicting per cent lean, showed that addition of conformation score improved the precision of fat score and fat depth for a group of 26 sides. It did not provide a significant improvement over RV346. However, in another group of 50 sides showing more variation in side mass and conformation, conformation score did significantly improve RV346. The best prediction of per cent lean, involving RV346 and tissue thicknesses, gave a residual standard deviation of 1·35%, and conformation score did not significantly improve this regression.