汽车内饰空气中污染成分的调查

用自制的活性炭采样管 ,采集了汽车轿箱内空气 ,并用二硫化碳解吸 ,气相色谱法分析 ,鉴定了汽车轿箱内空气中主要污染成分为苯系物 ,并对其含量进行测定 ,将其含量与室内空气质量标准对比 ,发现苯系物严重超标 在此基础上对汽车内饰空气污染提出了具体防治建议     

A comparative study of error detection in discourse

A study of error detection in discourse is reported in which children 10 to 13 years old listened to set of expository texts read aloud, read the texts via a moving window simulated on a computer screen, or read them typed on paper. Occasional changes were introduced in the texts, resulting in illformedness at a semantic level, at a morphosyntactic level, or (in reading) at an orthographic level. The subjects were 278 Swedish 4th and 6th grade pupils. Analysis of d showed that all test groups performed above chance, that 6th grade children were better at the task, and that errors were easiest to detect while listening. By the same standard, detecting errors when reading was easier from hard copy. However, 4th graders detected both more othographic and morpho-syntactic errors when reading from the moving window, suggesting some advantage in presenting text to younger readers from left to right.     

如何用JAVA为管理系统添加快速闪烁的欢迎窗口

主要介绍利庸JAVA的MediaTraeker类来实现快速闪烁窗口，通过创建组件重点说明MediaTracker类常用成员方法的应用。     

超级电容在环卫专用车的应用分析

以混合电能超级电容技术为平台,研究了超级电容在环卫高压清洗车上的应用,建立了超级电容环卫专用车的技术模型,分析了新能源代替常规环卫专用车的社会效益和经济效益,瞩望了该技术的发展前景.     

多种分类器在华北地区土地覆盖遥感分类中的性能评价

本文应用MODIS 250米分辨率遥感影像对中国华北地区分别采用最大似然法MLC、Parzen窗、CART决策树、BP神经网络、Fuzzy ARTMAP神经网络等5种分类方法进行区域尺度上土地覆盖制图的比较试验。结果表明：（1）Parzen窗法分类性能最优，CART和BP其次，Fuzzy ARTMAP表现较差；（2）CART决策树具有较好鲁棒性，但缺点是样本代价较大，BP神经网络分类器能达到较高精度，但缺点是需较高质量的样本和网络结构参数难以确定造成其稳健性较差，Fuzzy ARTMAP则未能表现出理想结果；（3）训练样本数量差异造成：MLC的分类精度差异值低于5％；Parzen窗法和Fuzzy ARTMAP差异在5％－10％之间；CART和BP差异在10％以上。     

Beyond known uncertainties: Interventions at the fuel-engine interface

The following article describes the history of the fuel-engine interface in two case studies (from 1900 onwards) with the goal of understanding the complexity of such an interface composed of two technological systems that do not form a clear hierarchical relationship. A technological setting with two divergent cores is particularly prone to external influence, in particular to governmental regulation.The proposed framework in this article complements and extends the existing literature on technological community in particular regarding: (a) the importance of the interface between industries that are not subordinate to one another, (b) the role of the regulator, and (c) the focus on hidden uncertainties. This study illustrates how certain types of uncertainties within complex innovative projects can result in inertia and sub-optimal solutions. The proposed framework has implications for theory, management, and policy practice.     

汽车生产配套模式与发展趋势分析

本文通过分析德国、美国、日本等国家汽车整车和零部件企业之间的合作关系,归纳总结了汽车生产配套的主要模式,预测了在汽车生产全球化进程下,汽车生产配套模式将向模块化和亚一体化方向转变.在此基础上,提出了我国发展汽车零部件配套工业的对策.     

机会窗企业快速成长的复杂性分析

市场机会、人才、核心技术与技能、产品构成了企业快速成长的主要牵引力 ,为此本文通过对产品的机会窗 ,机会窗企业 ,以及市场机会、人才、技术和产品的牵引循环的耗散结构和超循环分析 ,从机理上解释了机会窗企业快速成长的可能性和必然性。     

北京市发展汽车共享服务的经济生态效率及其可行性研究

提高产品的服务强度和服务的需求满足强度,增加单位产品提供的需求满足,并减少单位需求满足产生的环境生命周期影响,可以有效提高产品的经济生态效率。本文计算了荷兰汽车共享服务的经济生态效率,并对北京市非正式的汽车共享服务进行了实证研究。建议北京市政府应该规范顺风车服务,制定相关的政策鼓励发展正式的汽车共享服务。     

用投影法实现二维线段矩形窗口的裁剪

针对二维线段矩形窗口的裁剪提出一种新的方法—投影法。该方法思路简单,运行效率高。