汽车前轮侧滑量检测误差的分析研究(英)

文章对机动车辆侧滑量在智能检测过程中存在的各类误差进行了分析和估算,并根据误差的合成与分配理论确立了影响精度的主要因素,通过研究,使侧滑误差由０－５７８ｍ／ｋｍ 减小到０－０７５２ ｍ／ｋｍ     

预氧化对多孔碳化硅陶瓷抗氧化及抗热震性的影响

考察了多孔碳化硅陶瓷的抗氧化性及抗热震性,探讨了不同制造工艺对多孔碳化硅陶瓷抗氧化性及抗热震性的影响。研究了SiC陶瓷在热处理过程中SiC颗粒表面氧化形成的SiO_2在不同热处理温度的状态变化及其对试样抗热震性的影响。     

胶东半岛地热资源的特征

胶东半岛是山东省地热资源最丰富的地区,地热资源以天然温泉形式产出,地热系统属中低温深循环对流型,分布区域较为集中,大部分温泉出露在背斜核部与多组断裂交汇处．稍为偏高的大地热流是其主要热源,他表水是地下热水的主要补给水源,热水化学成分差异很大,水质以中性和偏碱性为主．胶东半岛地热主要用于洗浴和疗养,利用率很低,大量地热资源尚待勘探开发．     

Extreme value and cluster analysis of European daily temperature series

Time series of daily mean temperature obtained from the European Climate Assessment data set is analyzed with respect to their extremal properties. A time-series clustering approach which combines Bayesian methodology, extreme value theory and classification techniques is adopted for the analysis of the regional variability of temperature extremes. The daily mean temperature records are clustered on the basis of their corresponding predictive distributions for 25-, 50- and 100-year return values. The results of the cluster analysis show a clear distinction between the highest altitude stations, for which the return values are lowest, and the remaining stations. Furthermore, a clear distinction is also found between the northernmost stations in Scandinavia and the stations in central and southern Europe. This spatial structure of the return period distributions for 25-, 50- and 100-years seems to be consistent with projected changes in the variability of temperature extremes over Europe pointing to a different behavior in central Europe than in northern Europe and the Mediterranean area, possibly related to the effect of soil moisture and land-atmosphere coupling.     

Semi-parametric modelling of temperature records

A range of instrumental and proxy temperature records are examined semi-parametrically, using empirical densities and quantile autoregressions containing a unit root, to assess the extent of non-stationarity and the presence of global warming trends. Only the instrumental records covering the last century and a half show any evidence of non-stationarity, but the trend behaviour of these series remains elusive.     

某型飞机发动机油封装置的研制

飞机发动机油封是发动机在贮藏和运输时防止其零件发生锈蚀的主要装置.本文介绍某型飞机发动机油封装置的研制,使用结果表明:该油封装置操作简便,全封闭无污染,各项指标均达到航空发动机地面维护规程规范,保证了发动机在封存期间的完好性,具有明显的社会经济效益.     

基于SLS技术的非均质材料零件成型研究

基于SLS成型的非均质材料零件是一种变密度材料零件。预热温度和激光能量是影响SLS成型零件烧结密度的主要因素。通过实验调整预热温度和激光能量的参数,然后用MATALB对实验数据进行分析处理,得到烧结密度数学模型,达到对基于SLS成型的非均质材料零件烧结密度进行控制的目的。     

基于温度图式的英语概念隐喻

温度图式作为一种重要的基本意象图式,在英语概念系统中具有不容忽视的作用。研究表明：基于温度图式的英语概念隐喻表达,可以通过4个温度范畴投射到8个隐喻领域：疾病、色彩、兴趣与注意力、人或事物的活动程度、情感、社会地位、危险与压力、知识理解力,从而为下列假说提供佐证,即人类通过具体的身体经验来隐喻性地理解和构筑抽象的思维、情感：态度等概念系统。     

Improved adaptive group testing algorithms with applications to multiple access channels and dead sensor diagnosis

We study group-testing algorithms for resolving broadcast conflicts on a multiple access channel (MAC) and for identifying the dead sensors in a mobile ad hoc wireless network. In group-testing algorithms, we are asked to identify all the defective items in a set of items when we can test arbitrary subsets of items. In the standard group-testing problem, the result of a test is binary—the tested subset either contains defective items or not. In the more generalized versions we study in this paper, the result of each test is non-binary. For example, it may indicate whether the number of defective items contained in the tested subset is zero, one, or at least two. We give adaptive algorithms that are provably more efficient than previous group testing algorithms. We also show how our algorithms can be applied to solve conflict resolution on a MAC and dead sensor diagnosis. Dead sensor diagnosis poses an interesting challenge compared to MAC resolution, because dead sensors are not locally detectable, nor are they themselves active participants. A preliminary version of this paper was presented at SPAA 2006.     

基于单片机的温湿度检测系统设计简

以STC89C52RC单片机为中心控制器件,设计了温湿度检测系统,系统包括温度传感模块、湿度传感器、单片机编程模块、显示模决、控制模决五部分.该系统可以实时采集工厂环境中的温度和湿度,并将具体的数据显示在液晶显示屏上.系统具有结构简单,使用方便,温湿度检测灵活、精确等优点.