Conceptual design and RCS performance research of shipborne early warning aircraft

In order to improve the survivability of the aircraft,conceptual design and radar cross section（RCS） performance research are done. The CATIA software is used to design the 3D digital model of the shipborne early warning aircraft, and some measures are taken to reduce the RCS characteristics of the early warning aircraft at the same time. Based on the physical optics method and the equivalent electromagnetic flow method,the aircraft＇s RCS characteristics and strength distribution characteristics are simulated numerically, and compared with the foreign advanced shipborne early warning aircraft. The simulation results show that under the X radar band, when the incident wave pitching angle is 0？, compared with the foreign advanced shipborne early warning aircraft, the forward RCS average value of the conceptual shipborne early warning aircraft is reduced to 24.49%, the lateral RCS average value is reduced to 5.04%, and the backward RCS average value is reduced to 39.26%. The research results of this paper are expected to provide theoretical basis and technical support for the conceptual design and the stealth design of the shipborne early warning aircraft.     

煤矿生产中电动机事故原因分析及预防措施

电动机在煤矿生产中发生故障是难免的,但它严重地影响煤矿的安全生产。文章针对电动机事故的原因进行分析,提出了相应的预防措施。     

我国特别重大事故发生规律及特征分析

基于对我国2000～2008年发生的118起特别重大事故的统计分析，归纳总结出特别重大事故发生规律和特征：时间分布上存在月份、季度、小时和年度差异性；行业分布上存在不均衡性、不确定性和集中性；地域分布的不均衡性；事故后果的严重性和事故原因具有的共性等。针对特别重大事故的发生规律和特征，给出了相应的事故预防措施建议。研究结果对特剐重大事故的有效预防具有重要参考价值。     

Consensus intuitionistic fuzzy group decision-making method for aircraft cockpit display and control system evaluation

A novel group decision-making (GDM) method based on intuitionistic fuzzy sets (IFSs) is developed to evaluate the ergonomics of aircraft cockpit display and control system (ACDCS). The GDM process with four steps is discussed. Firstly, approaches are proposed to transform four types of common judgement representations into a unified expression by the form of the IFS, and the features of unifications are analyzed. Then, the aggregation operator called the IFSs weighted averaging (IFSWA) operator is taken to synthesize decision-makers’ (DMs’) preferences by the form of the IFS. In this operator, the DM’s reliability weights factors are determined based on the distance measure between their preferences. Finally, an improved score function is used to rank alternatives and to get the best one. An illustrative example proves the proposed method is effective to valuate the ergonomics of the ACDCS.     

交通事故责任认定在刑事审判中的运用－兼评最高人民法院[2000]33号司法解释

交通事故责任是由违章行为与交通事故的因果关系及其在因果关系中的作用决定的，所以在审理交通肇事刑事案件时，应注意这几个问题：交通事故责任不能直接等同于当事人的主观方面的过错；交通事故责任不一定周全了事故的所有原因力；交通事故推定责任不能作为定罪的依据。     

吸取矿井水害事故教训 强化矿井水害的防治

阐述并分析了矿井水害事故发生的原因,提出了防治矿井水害事故的措施。     

机动车与非机动车、行人交通事故双方皆无过错时的责任划分浅析

新修正的《中华人民共和国道路交通安全法》第76条未对机动车与非机动车、行人交通事故双方皆无过错时的责任划分作出规定,理论界对此观点各异,争议焦点主要在机动车是应该承担全部责任还是只承担10%的责任,亦或是双方承担公平责任。对此笔者观点趋向于由机动车承担全部责任这个观点。并从第76条的设计,机动车与非机动车驾驶人、行人事故的归责原则,侵权法的性质和作用三个方面进行论证。     

钻孔灌注桩施工常见事故的预防及处理

砼钻孔灌注桩在目前桥梁基础中广泛应用，其施工过程中的各类事故经常发生，本文分析了其成因，预防及相应的处理措施，对施工有一定指导意义。     

高动态飞行器姿态解算及三维视景仿真研究

建立了高动态飞行器姿态解算的数学模型,探讨了利用等效旋转矢量法解算姿态角的方法,并与四元数法进行了比较。建立了飞行器、地形、地物的三维模型,利用计算出来的数据进行飞行器的实时三维视景仿真模拟。三维视景仿真对直接观察、验证高动态飞行器的运动变化规律提供了极大的便利。     

虚拟座舱系统中精确和谐的空间感研究

在以“人”的感受为核心的VR应用系统中,空间一致感是实现高度“沉浸感”的基本核心要素之一。以虚拟飞行座舱系统为例,着重讨论在基于头盔显示器(HMD)的高沉浸感VR系统中,使用者在进行场景漫游和虚拟操作时的空间一致性及和谐感受的问题。通过实验和理论分析相结合的方法,详细分析影响用户空间一致感受各环节的变换原理,分析误差影响,然后针对不同类型和不同来源的误差提出了相应的校准和补偿的方法。由于该系统的典型性,得出的结论和方法在VR系统中具有很强的普遍性。