尤尼特·里格公司推出一种更坚固耐用且平稳的汽车

被公认为是本地和世界非公路汽车市场先驱的尤尼特·里格(Unit Rig)南非公司推出了一种 MT-3700型汽车,它是 Lectra Haul柴油-电动汽车系列的最新产品。MT-3700型汽车是经过对原型车进行多次改进而重新设计的车型,包括采用一个全新的车架、一个获专利权的氮-油悬架系统和一个新型的轴箱。据该公司销售经理 E.格罗布勒称:“由于采用了这些新构件,制造出的新型汽车比以前任何型号的汽车都坚固耐用且行驶平     

从潘兴Ⅱ与战斧的比较看远程巡航导弹的作战效能

比较了战斧巡航导弹和潘兴Ⅱ在打击目标对象上的相近和在技术途径、技术参数(战斗部参数)、费效比等方面的差异,讨论了巡航导弹的突防能力问题。在此基础上论述了远程巡航导弹的优点所在。     

光谱分析技术在柴油机故障诊断中的应用

1　概述自我段开展光谱分析并使用由美国超谱公司生产的SPECTROIL M型光谱仪以来,我们累计分析中、小、辅修、临修、中检、临时取样机车及突发性故障机车油样等共计3000台次,为分析数据的积累创造了良好的基础。通过原始分析数据的积累,为今后的故障诊断创造了良好的分析条     

用通用两点法测量明渠流速

一、前言测出一条河流的流量,通常是在垂直于水流方向的不同位置上测出其深度平均流速,再将其进行积分,然后即可求出流量。一般采取的步骤是,从垂直于水面方向测量0.2D和0.8D处的流速来求出其深度平均值,或测出0.6D处的流速,其中D为整个水流深度。有时,需要测量除0.2D和0.8D位置以外水深处的流速,例如,间歇流量计用其设在固定垂直位置上的两个探测器来连续监测流速。随着总水深的改变,其相对测试位置亦随之而     

24m~2烧结机自动化改造方案

介绍烧结机不停产自动化改造的方法,阐述构成工艺过程控制的DCS系统组合以及变频调速技术改造电磁滑差调速成功的选型方法。     

Preparation and storage stability of dried salted mutton

Minced (8 or 18 mm plate) mutton with salt (25%) and sorbate (0·4%) was pressed into cakes about 11 cm in diameter and 3 cm high. The cakes were partially dried in an air oven at 40°C for 48 h to a water activity of about 0·75. The cakes were packed, either in vacuo or in air, and stored at 30 or 2°C for up to 60 days. Objective assessment of quality showed that these dried salted meats can be kept for up to 60 days at 30°C with little loss of textural or nutritional quality although some fading, due to haemoprotein breakdown, occurs. Packaging in vacuum, however, minimises this loss of colour and would be recommended for centralised manufacture prior to distribution in developing, tropical countries.     

High-frequency differential piezoelectric photoacoustic investigation of ion-implanted (100) silicon wafers via laser beam position modulation

An exploratory application of position-modulation photoacoustic imaging of ion-implanted (100)-oriented Si wafers was undertaken to assess its potential as a diagnostic probe in semiconductor processing. Wafer scans were performed using acoustooptic modulation of a 1.06-mum Nd(3+):YAG laser beam up to 0.2 MHz with piezoelectric photoacoustic detection. Sensitivity ranges to ion-implanted parameters (ionic species and fluences) were studied and the capability of the technique to monitor processing-induced damage was established. Results indicate that position-modulated photoacoustic detection offers higher sensitivity than single-beam photothermal imaging and has distinct advantages over other analytical techniques.     

ICS直放站在海上钻井平台覆盖项目中的应用研究

随着经济的发展,运营商对通信服务提出了更高的要求,网络已不再局限于单纯的广义覆盖,许多特殊覆盖场景,如高铁、航道、海上平台等需要建设通信网络以提高用户的感知度及满意度,而这些区域通常也是网络的薄弱环节,传统的宏站建设不仅投资巨大,而且困难重重,ICS数字直放站以其独特的技术特性,成为低成本、快速解决特殊覆盖场景的最佳选择。     

有限遥测速率下卫星遥测数据设计方法研究

针对国内小卫星常用的统一遥测模式,讨论了在遥测速率受限的条件下,分包遥测格式设计应满足的基本条件;定义了分包遥测数据格式设计过程中的包编码损失率,并以此作为包数据格式编码效率的评价函数;分析了分包遥测数据格式设计过程中包长度、包采样周期等参数变化对评价函数的影响,进而给出了分包遥测数据格式设计中的应满足的条件和遵循的原则。