Automated driving recognition technologies for adverse weather conditions

During automated driving in urban areas, decisions must be made while recognizing the surrounding environment using sensors such as camera, Light Detection and Ranging (LiDAR), millimeter-wave radar (MWR), and the global navigation satellite system (GNSS). The ability to drive under various environmental conditions is an important issue for automated driving on any road. In order to introduce the automated vehicles into the markets, the ability to evaluate various traffic conditions and navigate safely presents serious challenges. Another important challenge is the development of a robust recognition system can account for adverse weather conditions. Sun glare, rain, fog, and snow are adverse weather conditions that can occur in the driving environment. This paper summarizes research focused on automated driving technologies and discuss challenges to identifying adverse weather and other situations that make driving difficult, thus complicating the introduction of automated vehicles to the market.     

战略装车点选址模型研究

分析了建立区域战略装车点的政策性原则和关联因素,并根据铁路运输生产实际模拟了在供需均衡条件下选站建点系统架构,构建战略装车点多点选址多类变量混合0-1非线性规划模型(MSLSLP)。模型以社会总成本最小化为出发点,协同考虑决策者和客户双方利益,将选站建点的改扩建费用、可变费用和代表客户利益的运输成本共同纳入目标体系。将建立战略装车点后的运输特点要求与相关选址模型的共性约束相结合构造约束条件,使其更具针对性。最后,以相当规模数值算例验证了模型的有效性和可行性。     

不可行集蚁群算法在铁路放射性物质载运中的应用

研究铁路货物运输中放射性物质的载运问题,目的是把安全运输与车辆的合理利用有机结合.以货物的客户要求期限与铁路运到期限之差的数学期望、铁路车辆的载重量利用率、装载货物的轻重搭配合理程度作为研究问题的3个目标;将装载货物运输指数限制、车辆标记载重限制、车辆载货容积限制、装载加固限制作为研究问题的约束条件,建立多目标规划模型.依据目标的重要性确定权向量,根据运输实际情况确定理想点,利用理想点法将多目标规划问题转化为单目标规划问题.运用基于不可行集的蚁群算法求得多目标规划问题的有效解.本文给出铁路放射性物质载运问题的计算实例,编程计算的结果证明蚁群算法具有较高的效率和可靠性.     

新校区网络规划探讨

本文根据新校区校园网的规划和建设历程，探讨了针对当前新校区校园网建设所涉及的具体规划原则和方法，提出了现阶段新校区网络技术的选择标准。     

基于链接图法和遗传算法的航路规划

航迹规划对军用飞行器完成任务具有重要的意义。链接图的特点是简单明了，文章针对链接图法进行航路规划的不足，使用遗传算法进行再次优化，使该航路满足了性能要求。最后给出了仿真，反正结果表明该方法的可行性。     

Public opinion and the environment: Ecology,the coastal zone,and public policy

Abstract

In a public opinion survey conducted in Santa Barbara county, California, respondents were interviewed regarding their feelings on coastal zone development, within a context of broader environmental and political issues.

A high degree of expressed concern for the environment was found, but the data also indicate a widespread reluctance to allocate a greater share of personal income to improve environmental quality.

Among the issues dealt with are citizen views on environmental problems, the effectiveness of government in the environmental field, offshore oil drilling, and coastal zone development.

The results show that on each of the issues analyzed, a person's education, age, and the extent of his political participation are the major factors which determine his concern for the environment. Additional variables appear to have some significance in determining attitudes toward local environmental projects and perceptions of government.

Offered are implications of the findings for the future of organized action on environmental problems.     

Regional fishery management councils: The federal perspective

Abstract

Under the Magnuson Fishery Conservation and Management Act of 1976, the federal government cooperates with states, the fishing industry, and public constituencies to regulate fisheries. This paper notes changes in U.S. fisheries over the last decade, remarks on the effectiveness of the Act, and makes suggestions for an improved fishery management process.     

基于增量搜索的车辆动态路径规划算法研究

D＊Lite算法是一种非常高效的增量搜索算法,适合于动态环境下的路径规划。文章基于D＊Lite算法的原理,对该算法的性能及应用于车辆路径规划的适用性进行改进,提高了算法的稳定性和结果的可靠性,并通过试验和算法评价验证了改进的D＊Lite算法在复杂、动态环境下规划路径的有效性。     

东京都市圈郊区圈层轨道交通供需特征分析及其对上海的启示

上海开始了新一轮城市总体规划,而市郊轨道交通网络规划对城市总体规划影响很大。为了给上海都市圈市郊轨道交通网规划提供启发,选择了与上海有可比性的东京都市圈作为研究对象,较深入地剖析了东京都市圈市郊轨道交通的供需特征;分圈层比较了东京都市圈与上海都市圈的相关统计数据,得到了东京都市圈郊区圈层的4类轨道交通的长度及放射线、周向线的供给分布特征和郊区圈层的径向、周向及过境出行需求特征,以及供需二者之间的关系特征。在此基础上得到启示,对上海都市圈市郊轨道交通网规划提出了建议。     

The response of the legal system to technological innovation in aquaculture: A comparative study of mariculture legislation in California,Florida and Maine

This article examines salt‐water aquaculture (mariculture) legislation in California, Florida, and Maine, as illustrative of one generic response of the law to aquacultural innovation. Unlike aquacultural legislation in other states, generally drafted to restrict leasing of coastal waters for specific existing technologies, the legislation studied represents a more flexible approach which would accommodate new technologies. Analysis of specific provisions of the three laws indicates the complexity of the issues involved and a variety of mechanisms selected for regulating mariculture, and identifies different state priorities and goals. This report concludes that whereas broadly drafted legislation exemplified by the statutes under study is more likely to accommodate new mariculture technologies than piecemeal legislation, there are a number of complex issues that must be identified and resolved in order to achieve the desired results. The failure of each of the states to respond fully to the broad range of issues involved may inhibit aquacultural innovation or unduly restrict nonaquacultural uses of the coastal zone.