路试充分发出平均减速度可取信范围分析

当我们使用便携式制动性能测试仪来检验涉案车辆制动性能,为什么有时获得的充分发出的平均减速度（MFDD,mean fully developed deceleration）值会大于重力加速度g,这些较大的MFDD值与《便携式制动性能测试仪校准规范》中的测量范围是否相冲突,这些检测值在车速等运算中是否可以被采信,路试检验MFDD的有效范围是什么,鉴定业界对这些问题有着诸多争议和不同答案。本文旨在对路面摩擦系数进行讨论,并利用达朗贝尔原理建立车辆制动受力模型,从而证明高于g的充分发出的平均减速度在路试检验中可以成立,并确认了该值的可以取信范围0~l1h×g。     

制造业同构现象与收入变动的国际比较研究——基于中国长三角地区与日本东海地区的比较

运用产业同构系数、人均GDP、人均工资等指标,比较研究了20年来中国沪苏浙地区和日本东海地区产业分工与收入差距的现状和特征,研究结果显示：产业同构系数与收入差距变化间的关系并不确定。调节产业同构现象的措施对于缩小收入差距未必有确定的、显著的作用,解决收入差距应主要运用收入分配政策。     

Swiss Air Traffic Policy: Noise between Berne and Berlin

This article looks at the negotiations between Switzerland and Germany on air traffic regulation with the help of negotiation analysis tools. A number of factors pre‐eminent in the literature on negotiation processes and outcomes are presented and critically assessed. In particular arguments of “power”, which are often insufficiently explored in analysing interstate cooperation, are brought back into the picture. The article argues that structural power best explains the negotiation results while domestic politics and information asymmetries both account for non‐ratification of the treaty. Institutionalist arguments on the constraining effects of international norms and institutions as well as explanations focusing on negotiation skills are of minor importance. Moreover, the nature of the Swiss intra‐governmental setting at the federal level did not encourage the Swiss negotiators to exploit all means during the different stages of the bargaining process. The article concludes by illuminating a number of policy observations in the broader context of Swiss foreign relations and indicating avenues for further research.     

对国家《室内空气质量标准》的几点质疑

新装修房屋室内空气污染问题越来越受到人们关注。2003年颁布实施的GB/T 18883—2002《室内空气质量标准》虽然在很大程度上限制了装修所引起的室内空气污染,但在实施过程中发现,《室内空气质量标准》对化学性污染物标准检测方法有些矛盾的地方,影响了测量精度和准确性。笔者提出了质疑和改进的建议。     

小波子空间的抽样定理

本文首先介绍了古典仙农抽样定理,然后回顾了小波分析和多尺度分析的历史;接着,从低通滤波器系数和小波的角度刻画了小波子空间中抽样定理成立的一个充要条件,并研究了它们的对称性。     

论远红外线在汽车节油降低空气污染方面的原理及实践

波长 3～ 2 0 μm的远红外线光子可以激发汽车燃油中碳氢分子的键能 ,以提高其热燃效率 ,故能增加发动机输出功率 ,并有节油与降低废气排放的功效     

2008年《空战和导弹战国际人道法手册》草案亟待解决的几个问题

由美国哈佛大学"人道主义政策与冲突研究"项目负责起草的《空战和导弹战国际人道法手册》形成了第三个版本即2008年1月草案及评注,并着手与美国、中国、法国、比利时、俄罗斯、英国等国家的作战、武器和法律专家进行"双边/地区磋商",以增强"手册"的现实性和适用性。磋商中,专家们发现"手册"草案存在不少问题:如"手册"草案"定位不准";一些原则性问题未能解决好,如习惯规则、创新与重述之间的关系等;一些"立法"技术问题遗漏较多,如某些重要概念内涵的变化、援引文献的权威性等,"手册"是否适用于"非国际性武装冲突"和"外层空间军事活动",以及对"平民直接/实际参加敌对行动"的判定标准等重要问题,有待专家组进一步研究解决。     

试论国际航空承运人对旅客的赔偿制度及我国立法对策

1929年以来,世界各国在民用航空领域相继达成了一系列国际条约或协定,其中以1929年华沙公约为主轴,因此,这一系列条约所形成的国际航空承运人赔偿制度,被国际民航界称之为“华沙体系”。2003年正式生效的1999年蒙特利尔公约对“华沙体系”进行了修改,形成了新的国际承运人责任赔偿制度,我国应当与蒙特利尔公约接轨,进一步完善有关的国内立法。     

Suicide by Intentional Air embolism

Venous air embolism occurs when air enters the venous system. The main causes of venous air embolism include medical procedures, neck and head trauma, and injuries of the genitals. Self‐induced suicidal (and intentional) air embolism is extremely rare. The authors report a rare case of a suicidal air embolism committed using a self‐made tool composed of a plastic bottle and an infusion set, injecting nearly 2000 mL of air into the cubital vein. The toxicological analysis suggested that midazolam, together with air, was also injected into the circulation using the same bottle and infusion set.     

The effect of compressed air foam on the detection of hydrocarbon fuels in fire debris samples

In 1998/99 the New Zealand Fire Service implemented compressed air foam delivery systems for the suppression of fires in rural areas. This study investigated whether the introduction of the foam to the seat of the fire created any problems in subsequent analyses of fire debris samples. No significant interferences from the foam were found when the samples were analysed by direct headspace using activated carbon strips. The only foam component detected was limonene.