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谢尔盖·纳扎洛维奇·布勃卡 《首都体育学院学报》2011,23(6):481-486
阐述近10多年来积累的在积极商业化条件下发展奥林匹克运动的经验。回顾奥林匹克运动的领导人、广泛的社会阶层对发展奥林匹克竞技运动态度的进步;指出基本完成了国际奥林匹克运动对新的社会-经济现实和世界市场要求的适应过程;实施市场计划保障了奥林匹克运动财政稳定性和经济的独立性,为支持各大洲的奥林匹克运动奠定了坚实的物质基础,为培养参加奥运会的运动员提供了优良的条件。 相似文献
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Finite-time stability involves dynamical systems whose trajectories converge to an equilibrium state in finite time. In this paper, we consider a general class of fully actuated mechanical systems described by Euler–Lagrange dynamics and the class of underactuated systems represented by mobile robot dynamics that are required to reach and maintain the desired trajectory in finite time. An approach known as the terminal sliding mode control (TSMC) involves non-smooth sliding surfaces such that, while on the sliding surface, the error states converge to the origin in finite time thus ensuring finite-time tracking. The main advantage of this control scheme is in fast converging times without excessive control effort. Such controllers are known to have singularities in some parts of the state space and, in this paper, we propose a method of partitioning the state space into two regions where the TSMC is bounded and its complement. We show that the region of bounded TSMC is invariant and design an auxiliary sliding mode controller predicated on linear smooth sliding surface for the initial conditions outside this region. Furthermore, we extend these results to address TSMC for underactuated systems characterized by the mobile robot dynamics. We demonstrate the efficacy of our approach by implementing it for a scenario when multiple dynamic agents are required to move in a fixed formation with respect to the formation leader. Finally, we validate our results experimentally using a wheeled mobile robot platform. 相似文献
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One-thousand two-hundred and ninety university students from twenty-seven ethnic?national groups across six locations in the former Soviet Union (Novopolotsk in Byelorussia, Kharkov in the Ukraine, Moscow and Nizniy Novgorod in Russia, Ufa in the Bashkir Autonomous Republic and Ulan-Ude in the Buryat Autonomous Republic) participated in 1991–1992 in a survey investigating the existence of ingroup preference in inter-ethnic contact, ingroup consensus on an ethnic hierarchy of outgroups and the measure of intergroup consensus on an ethnic hierarchy among the ethnic?national groups in each location. Hypotheses about ingroup preference, ethnic hierarchies and consensus were derived from realistic group conflict theory, social identity theory and from the assumption that outgroup preferences reflect considerations of the status effects of intergroup contact. It appeared that the last type of hypothesis could explain most of the results. 相似文献
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In a study of 243 firms of varying sizes across 14 different industries, we investigate the effect of customer participation on new product development performance. We confirm that overall customer participation is positively related to new product development performance and that the effect is mediated by innovativeness. We also demonstrate that these effects are contingent upon absorptive capacity of the firm in question such that firms with high absorptive capacity stand to gain more from engaging their customers in new product development than firms with low absorptive capacity, especially at the later stages of the NPD process. The results are robust to alternative estimation techniques, measures employed to operationalize key concepts, and the industrial makeup of the sample. Post hoc analyses provide non-trivial managerial implications for the decision makers at the firm level. 相似文献
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Natalia Rakhlin Cláudia Cardoso-Martins Sergey A. Kornilov Elena L. Grigorenko 《Annals of dyslexia》2013,63(3-4):253-273
The goal of the study was to investigate the overlap between developmental language disorder (DLD) and developmental dyslexia, identified through spelling difficulties (SD), in Russian-speaking children. In particular, we studied the role of phoneme awareness (PA), rapid automatized naming (RAN), pseudoword repetition (PWR), morphological (MA), and orthographic awareness (OA) in differentiating between children with DLD who have SD from children with DLD who are average spellers by comparing the two groups to each other, to typically developing children as well as children with SD but without spoken language deficits. One hundred forty-nine children, aged 10.40 to 14.00 years, participated in the study. The results indicated that the SD, DLD, and DLD/SD groups did not differ from each other on PA and RAN Letters and underperformed in comparison to the control groups. However, whereas the children with written language deficits (SD and DLD/SD groups) underperformed on RAN Objects and Digits, PWR, OA, and MA, the children with DLD and no SD performed similarly to the children from the control groups on these measures. In contrast, the two groups with spoken language deficits (DLD and DLD/SD) underperformed on RAN Colors in comparison to the control groups and the group of children with SD only. The results support the notion that those children with DLD who have unimpaired PWR and RAN skills are able to overcome their weaknesses in spoken language and PA and acquire basic literacy on a par with their age peers with typical language. We also argue that our findings support a multifactorial model of DLD. 相似文献
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AbstractOn April 1, 2018, the new standards of compliance to the code of the World Anti-Doping Agency (WADA) came into force. The new standards impact all sports. An important amendment has been made to an article of the existing code ‘Additional Roles and Responsibility of the Parties’. Now, all international federations and the unions in agreement with WADA are obliged to reject applications for holding all sporting events from countries that do not comply with the WADA code. By then, Russian elite sport remained in isolation because the Russian Anti-Doping Agency (RUSADA) had no license from WADA until a compromise agreement allowed Russia back into international sports in September 2018. The probability of obtaining permanent return to international sport was extremely low. In order to obtain the license, Russian sport authorities were asked to agree with the reports of Professor McLaren and to admit the existence of doping support in the country at the state level, which seemed improbable. In Russia, although the new standards of the World Anti-Doping Agency code have not caused special concerns it directly impact Russian elite sport. Unless certain conditions were met by 2019, there was a high probability that Russia would not be able to attend large international competitions in the near future, including the 2020 Tokyo Olympics. The situation dictates the choice of the new strategy of development for Russian sport and new model for the fight against doping, which can be not dependent on WADA. To date, there have been no real checks on WADA’s authority other than occasional decisions in the Court of Arbitration for Sport. Academics who are critical of WADA’s functions often find themselves marginalized when the purported global doping “crisis” should bring “all hands on deck” to provide a humanistic and scientific approach that is best for athletes past, present and future. The functions of WADA in investigating, charging and punishing athletes do not contribute to sustainable development of sport and the sports industry around the world, and create unipolar environment of influence on sports development. Therefore, in this article, we describe some alternative forms and new order of regulation of the anti-doping relations in sport. 相似文献
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Ph.D. Senior researcher at the Scientific Research Centre of the Institute of Youth (Moscow). Specialist in studies of youth
policies and civil society. Author ofInternational experience of public support of the youth organizations (1995) andSituation and prospects of social voluntary action in Russia (1995). 相似文献
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Sergey Kukushkin 《European Journal of Engineering Education》2012,37(5):500-507
The problem of technological creativity in Russia is briefly discussed. Special attention is paid to the development of indigenous engineering corpus in unfavourable conditions and some reasons for engineers’ low creativity are revealed. The Soviet system of engineering higher education (HE) is criticised as not focused on fostering creative engineers and the existing HE system as a degraded relic of the Soviet one. Continuous education and training in advanced corporations engaged in innovations seems better suited for preparing engineers. 相似文献