增程式混合动力集装箱龙门起重机能量智能控制策略     

刘海威  张敏 《上海海事大学学报》2016,37(2):77-82

针对集装箱龙门起重机的具体工况需求和特点，构建一种适用于集装箱龙门起重机的增程式混合动力系统，提出并分析该动力系统的能量智能控制策略，设计相应的智能控制模型.通过以动力电池组的荷电状态（State Of Charge, SOC）和集装箱龙门起重机运行能量需求为模糊输入，以动力电池组的充电功率为模糊输出，实现了对增程式混合动力系统的智能控制.仿真结果验证了该控制策略和控制模型的可行性和有效性.  相似文献   

权利法哲学视野中的体育腐败及其治理原则     

兰薇  姜世波 《北京体育大学学报》2017,40(12):25-29

摘要：针对体育腐败现象，主要通过文献资料法，从权利法哲学视角对体育腐败的定义、本质及其治理原则进行法理解读，目的在于揭示体育领域腐败的深层机理并得出治理之策。体育腐败是发生在体育领域之内的腐败，是享有体育公共权力的主体滥用或怠于行使体育公共权力的行为。体育腐败可以分为两种情形，一种是利用体育职权为自己或他人谋取不正当利益；另一种情形是虽未获取不正当利益，但滥用或怠于行使体育职权致使他人利益或公共利益受损。体育腐败的本质源于在体育权利与体育权力的博弈过程中体育权利之抑制以及体育权力之嚣长，因此，体育腐败的基本治理应遵循以下两个原则：体育权利张扬原则以及体育权力制约原则。体育制度和体育道德是实现体育权利张扬和体育权力制约最有效之措施，应以体现权利张扬和权力制约的体育制度规范之“硬法”辅之以体育道德伦理的教化和治理之“软法”。  相似文献   

我国城市体育文化与城市文化的相容性分析     

林〓宁  李〓凌 《广州体育学院学报》2017,37(4):48-52

随着物质生活水平的逐步提高,人们越来越重视城市的文化功能.但是在现实中,我国的城市发展过于强调经济指标,而忽视了文化建设,导致许多城市面临着文化缺失的问题.体育文化与城市文化,是社会主义文化的重要组成部分.文章分析总结了我国城市发展中的文化缺失现象,对体育文化与城市文化发展的相容性进行分析,认为促进体育文化的发展在一定程度上丰富了城市文化,增加了城市文化的内涵与活力,是繁荣城市文化的重要途径.提出要在塑造文化价值观、创建独特的文化发展模式、协调好文化事业和文化产业的关系、促进文化互动交流和文化创新等几个方面来推进城市体育文化的发展.  相似文献   

Optimal sampling frequency in recording of resistance training exercises     

Paolo Bardella  Irene Carrasquilla García  Marco Pozzo  Julio Tous-Fajardo  Eduardo Saez de Villareal 《Sports biomechanics / International Society of Biomechanics in Sports》2017,16(1):102-114

The purpose of this study was to analyse the raw lifting speed collected during four different resistance training exercises to assess the optimal sampling frequency. Eight physically active participants performed sets of Squat Jumps, Countermovement Jumps, Squats and Bench Presses at a maximal lifting speed. A linear encoder was used to measure the instantaneous speed at a 200 Hz sampling rate. Subsequently, the power spectrum of the signal was computed by evaluating its Discrete Fourier Transform. The sampling frequency needed to reconstruct the signals with an error of less than 0.1% was f_99.9 = 11.615 ± 2.680 Hz for the exercise exhibiting the largest bandwidth, with the absolute highest individual value being 17.467 Hz. There was no difference between sets in any of the exercises. Using the closest integer sampling frequency value (25 Hz) yielded a reconstruction of the signal up to 99.975 ± 0.025% of its total in the worst case. In conclusion, a sampling rate of 25 Hz or above is more than adequate to record raw speed data and compute power during resistance training exercises, even under the most extreme circumstances during explosive exercises. Higher sampling frequencies provide no increase in the recording precision and may instead have adverse effects on the overall data quality.  相似文献   

我国体育产业发展现状、问题与对策建议     

荆林波 《南京体育学院学报(社会科学版)》2016,(4):1-10

体育产业化是世界体育强国发展的普遍规律，作为朝阳产业，它的发展程度是衡量一个国家体育经济与体育文化发展水平的重要标志。文中通过文献资料整理，对体育产业的概念进行了界定和阐释，以全球体育产业为视角，对美国、英国、德国和澳大利亚的发展状况进行对比分析，梳理和归纳我国体育产业发展特征，剖析我国体育产业存在的问题，以“十三五”国家发展战略为契机，提出了一系列促进我国体育产业整体发展水平的对策与建议，以期为我国实现体育强国梦提供一定的理论参考。  相似文献   

Experiences of Danish Business Expatriates in Russia: Power Distance in Organizational Communication     

Elena V. Chudnovskaya  Laura S. O’Hara 《Journal of Intercultural Communication Research》2016,45(4):261-281

Rapid globalization of business processes stimulates many companies to dispatch their employees – business expatriates – on overseas assignments. Russia differs markedly from many other cultures in terms of specific communication norms and rules. Understanding such differences in organizational life is crucial for the success of business expatriates working there. This study employs in-depth interviews with eight Danish business expatriates who worked in Russia and examines the differences between the Danes and the Russians in terms of communication characteristics related to Hofstede’s cultural dimension power distance. This work enhances scholars’ empirical knowledge of power distance, which has rarely been investigated qualitatively.  相似文献   

复合式训练影响青少年下肢爆发力的meta分析     

翟华楠  周彤 《武汉体育学院学报》2020,54(10):65-71

目的：运用元分析的方法检验复合式训练对青少年下肢爆发力影响的干预效果，检验并提出最优的运动干预方案。方法：运用STATA 15.1和Review Manager 5.3对纳入的10篇文献和301名被试者通过设置抗阻类型、抗阻强度、间歇时间、训练频率和训练周期等5个调节变量进行亚组分析，采用固定效应模型进行整体效应、异质性、发表偏倚性检验。结果：（1）复合式训练对跳跃类运动表现的影响效应量d0.36，对短跑类运动表现的影响效应量d-0.51，两者达到中等效应且具有统计学意义；（2）本研究纳入的10篇文献异质性较低，间歇时间、训练频率和训练周期的对跳跃类和短跑类运动表现影响的效应量有一定差别。结论：（1）复合式训练能够显著提升青少年跳跃类和短跑类运动表现；（2）抗阻训练选择等张收缩、强度70%1RM以下、小于3分钟的间歇时间、在4~8周内选择每周1-2次的复合式训练能够对青少年运动表现有较好的提升；（3）围绕青少年人群开展的复合式训练较为缺乏，后续研究应加强理论与实践研究。  相似文献   

Assessment of leg muscles mechanical capacities: Which jump,loading, and variable type provide the most reliable outcomes?     

Amador García-Ramos  Belén Feriche  Alejandro Pérez-Castilla  Paulino Padial  Slobodan Jaric 《European Journal of Sport Science》2017,17(6):690-698

This study aimed to explore the strength of the force–velocity (F–V) relationship of lower limb muscles and the reliability of its parameters (maximum force [F₀], slope [a], maximum velocity [V₀], and maximum power [P₀]). Twenty-three men were tested in two different jump types (squat and countermovement jump: SJ and CMJ), performed under two different loading conditions (free weight and Smith machine: Free and Smith) with 0, 17, 30, 45, 60, and 75?kg loads. The maximum and averaged values of F and V were obtained for the F–V relationship modelling. All F–V relationships were strong and linear independently whether observed from the averaged across the participants (r?≥?0.98) or individual data (r?=?0.94–0.98), while their parameters were generally highly reliable (F₀ [CV: 4.85%, ICC: 0.87], V₀ [CV: 6.10%, ICC: 0.82], a [CV: 10.5%, ICC: 0.81], and P₀ [CV: 3.5%, ICC: 0.93]). Both the strength of the F–V relationships and the reliability of their parameters were significantly higher for (1) the CMJ over the SJ, (2) the Free over the Smith loading type, and (3) the maximum over the averaged F and V variables. In conclusion, although the F–V relationships obtained from all the jumps tested were linear and generally highly reliable, the less appropriate choice for testing the F–V relationship could be through the averaged F and V data obtained from the SJ performed either in a Free weight or in a Smith machine. Insubstantial differences exist among the other combinations tested.  相似文献   

Sports’ disciplinary legacy and the challenge of ‘coaching differently’     

Jim Denison  Joseph P. Mills  Timothy Konoval 《Sport, Education and Society》2017,22(6):772-783

Be empowering. Be athlete-centered. Be autonomy supportive. These are three related topics currently being promoted by sport psychologists and sport pedagogists in an effort to recognize athletes’ unique qualities and developmental differences and make coaching more holistic and coaches more considerate. This has led us to ask, how likely are such initiatives to lead to coaches putting their athletes at the center of the coaching process given that coaches’ practices have largely been formed through relations of power that subordinate and objectify athletes’ bodies through the regular application of a range of disciplinary techniques and instruments [e.g. Barker-Ruchti, N., &; Tinning, R. (2010). Foucault in leotards: Corporeal discipline in women's artistic gymnastics. Sociology of Sport Journal, 27, 229–250; Heikkala, J. (1993). Discipline and excel: Techniques of the self and body and the logic of competing. Sociology of Sport Journal, 10, 397–412; Gearity, B., &; Mills, J. P. (2012). Discipline and punish in the weight room. Sports Coaching Review, 1, 124–134]? In other words, to try to develop athlete-centered coaches capable of coaching in ways that will empower their athletes without also problematizing the discursive formation of coaches’ practices concerns us [Denison, J., &; Mills, J. P. (2014). Planning for distance running: Coaching with Foucault. Sports Coaching Review, 3, 1–16]. Put differently: how can athlete empowerment initiatives be anything more than rhetoric within a disciplinary framework that normalizes maximum coach control? It is this question that we intend to explore in this paper. More specifically, as Foucauldians, we will argue that coaching with greater consideration for athletes’ unique qualities and developmental differences needs to entail coaching in a less disciplinary way and with an awareness and appreciation of the many unseen effects that disciplinary power can have on coaches’ practices and athletes’ bodies.  相似文献   

Trait Affection Given and Received: A Test of Hofstede’s Theoretical Framework     

Daniel H. Mansson  Aldís G. Sigurðardóttir 《Journal of Intercultural Communication Research》2017,46(2):161-172

This study sought to address Hofstede and McCrae’s (2004) call for systematic cross-cultural comparisons of trait-like attributes. Specifically, we examined the extent to which Danish, Icelandic, Polish, and American adults’ trait affection given and trait affection received are (a) dependent on national origin, and (b) associated with Hofstede’s dimensions of cultures (i.e. individualism-collectivism, masculinity-femininity, power distance, and uncertainty avoidance). The participants (N = 606) completed a questionnaire in English that consisted of the trait affection given and trait affection received scales. Results of a multivariate analysis of variance and linear regression analyses revealed that people’s trait affection given and received are (a) dependent on national origin, and (b) associated with Hofstede’s dimensions of cultures.  相似文献