浅析合同中不可抗力的认定——兼谈我国不可抗力制度的完善

本文结合联合国国际货物销售合同公约,比较了不可抗力制度和情势变迁制度的异同,并通过多个案例,分析了不可抗力的认定,并对我国不可抗力制度的完善提出了相应的建议。     

香港警察执法监督机制概述

近年来 ,香港一直被公认为世界上最安全的城市之一。同时 ,香港警察也被誉为一支纪律严明、执法公正、工作效率高的警队。香港警察的成功经验是与其具有一套较为完备的警察执法监督制约机制分不开的。文章以《香港警察条例》等法律为依据 ,从立法状况、监督形式、监督机构及其职责等方面 ,对香港警察执法监督机制进行分析研究 ,并探讨如何借鉴其有益经验和作法来进一步完善内地公安机关人民警察执法权的监督机制。     

Acting diverse: target group orientation as key competence in engineering education

International companies are recognised by equity between men and women as well as between other different groups (Diversity) as an economic factor and incorporate it into their company visions. Mixed teams are set up to design target group-oriented products, for example in automotive engineering. Therefore they need employees who represent the different target groups, leading to a better integration of women and minority groups into their work force. The Managing Diversity approach is entering the German or European labour market via internationally working companies from the US, where Managing Diversity has been on the agenda for many years. At the same time, industry and universities in Germany face a huge problem: the lack of personnel in technical professions, especially the absence of women and of technically gifted, but not technically interested men. Additionally, during recent years, industry claims that the non-technical basic knowledge of graduates is very poor—and these are the competences that are important for successful cooperation processes. The current article will first describe the theoretical basis of teaching and learning diversity as a key competence and then show an example of implementing diversity and key competences in the traditional engineering curriculum.     

扫描探针显微镜在机械教学中的应用

介绍扫描探针显微镜教学演示软件。该软件将CAI技术和SPM技术结合在一起，主要运用文字说明，静态图像，三维动画，模拟仿真等方法，对SPM的初学者进行了SPM的原理介绍和使用培训，可以大大缩短他们的学习时间，并能使其在较短的时间内对SPM有个较为深入和全面的了解。     

Proportional-integral-derivative control of nonlinear half-car electro-hydraulic suspension systems

This paper presents the development of a proportional-integral-derivative (PID)-based control method for application to active vehicle suspension systems (AVSS). This method uses an inner PID hydraulic actuator force control loop, in combination with an outer PID suspension travel control loop, to control a nonlinear half-car AVSS. Robustness to model uncertainty in the form of variation in suspension damping is tested, comparing performance of the AVSS with a passive vehicle suspension system (PVSS), with similar model parameters. Spectral analysis of suspension system model output data, obtained by performing a road input disturbance frequency sweep, provides frequency response plots for both nonlinear vehicle suspension systems and time domain vehicle responses to a sinusoidal road input disturbance on a smooth road. The results show the greater robustness of the AVSS over the PVSS to parametric uncertainty in the frequency and time domains.     

The Good Will Hunting Technique

“The Good Will Hunting Technique” analyzes and enacts rhetorical paradigms present in popular culture. The main objects of examination are Gus van Sant's film, Good Will Hunting, and Eminem's music video “Mosh.” The author extracts positive aspects of popular culture to feature a rational-affective approach to rhetoric. The notion of mind–body rhetorical collaboration, which stems from Behavioral Doctrine developed during Germany's Weimar era, combines an emphasis on exteriority with traditional notions of rhetoric to establish a method for progressive action in lived reality.     

特大桥缆索吊装系统在北盘江大桥施工中的应用

缆索吊装系统主要用来完成加劲梁的空间运送和就位,是整个施工过程的关键工艺之一,也是施工技术中难度较大的一个问题,因此。有必要对缆索吊装系统进行系统的分析与计算。     

The impact absorption characteristics of cricket batting helmets

To determine whether the helmets currently used by cricket batsmen offer sufficient protection against impacts of a cricket ball, the impact absorption characteristics of six helmets were measured using the drop test at an impact velocity equivalent to a cricket ball with a release speed of 160 km·h-1 (44.4 m·s -1 ). An accelerometer transducer attached to a 5.0 kg striker was dropped from a height of 3.14 m onto the batting helmets to measure the impact characteristics at the three different impact sites:right temple, forehead and back of the helmet. These data were further expressed as a percentage above (-) or below (+) the recommended safety standard of 300 g . The results indicate that the force absorption characteristics of the helmets showed inter- and intra-helmet variations, with 14 of the 18 impact sites (66.7%) assessed meeting the recommended safety standards. Helmets 1, 2 and 4 succeeded in meeting the safety standards at all impact sites; helmets 5 and 6 both failed at the back and forehead, while helmet 3 failed at all impact sites. These differences were due to the structure and composition of the inner protective layer of the helmets. The helmets that succeeded in meeting the standards were made with a moulded polystyrene insert, a heat-formed ethylene vinyl acetate (EVA) insert, or EVA with a relatively high density that allows a minimal amount of movement of the helmet at ball impact.     

Simultaneous measurement of back and front foot ground reaction forces during the same delivery stride of the fast-medium bowler

Six male cricket bowlers (mean - s x ¥ : age 23.5 - 1.3 years; height 1.83 - 0.04 m; body weight 826 - 20 N) performed their typical bowling action at a set of stumps positioned at standard pitch length (20.1 m). A specially designed force platform rig allowed the correct positioning of two force platforms to be achieved beneath an outdoor polyflex runway (0.017 m depth) for each player's delivery stride pattern. For the back foot, the peak vertical ground reaction force was 1.95 - 0.08 kN (2.37 - 0.14 BW) and the braking force was 0.77 - 0.12 kN (0.94 - 0.16 BW). For the front foot, the peak vertical force was 4.80 - 0.92 kN (5.75 - 0.98 BW) and the braking force was 2.93 - 0.56 kN (3.54 - 0.67 BW). The mean peak vertical loading rate for front foot contact was 205 - 52.8 kN·s -1 (249 - 64 BW·s -1 ) with mean values ranging from 81 to 446 kN·s -1 (98 to 540 BW·s-1). The range for back foot contact was much smaller, 25-70 kN·s -1 (30-85 BW·s -1 ), with a mean of 41.7 - 7.10 kN·s -1 (50.6 - 8.6 BW·s -1 ). Mean peak impact occurred 24 ms after touchdown for the back foot and 16 ms after touchdown for the front foot. At impact, mean peak loading rates were greater for the front foot at 246 kN·s -1 (298 BW·s -1 ), with a range of 80-483 kN·s -1 (98-534 BW·s -1 ), than for the back foot at 65 kN·s -1 (79 BW·s -1 ), with a range of 40-84 kN·s -1 (49-110 BW·s -1 ).