在体育教学中怎样培养学生终身体育的意识和能力

在体育教学过程中,注重培养学生的终身体育意识和能力是培养现代化人才的需要,也体现了我国的教育方针。培养学生的终身体育意识和能力是学校教师面临的一项重要任务,需要教师采取有效措施,做好备课工作,培养学生自觉体育锻炼的兴趣和技能,从而形成终身体育意识。希望通过本文的写作,对当前的体育教学有所帮助。     

各国促进科技经济结合的经济举措探析

本文从经济体制方面分析探讨了各国促进科技经济结合的主要举措,包括坚持经济发展依靠科技创新的战略导向,改革收入分配体系提高企业对科技创新的需求和把科技成果转化为生产力的动力,完善创业、知识产权、风险投资等与经济科技结合的各种保障措施等。     

新形势下中国企业培育国际竞争力分析

面对经济转型和全球化的影响,提升国际竞争力和参与中国乃至世界市场与行业的整合,已经成为中国企业突破市场、资源和环境约束,实现可持续发展的必然选择。在提升国际竞争力的过程中,中国企业必须克服制度因素、企业因素和互动因素三个方面的限制;必须在中国政府进一步的改革和中国企业战略行为调整的基础上,充分发挥国家特定优势和企业特定优势来培育中国企业的国际竞争力;必须充分将资源高度集中于主业,通过横向和纵向整合做强主业,提升在主业上与国外跨国企业动态互动的能力。     

Consensus disturbance rejection with event-triggered communications

This paper considers the consensus disturbance rejection problem of networks of linear agents with event-triggered communications in the presence of matched disturbances. Based on the disturbance observer, distributed event-based consensus protocols are proposed and constructed for both the cases of neutrally stable and general linear agents. Under the proposed event-based consensus protocol, it is shown that the consensus errors are asymptotically stable and the Zeno behavior can be excluded. Compared to the previous related works, our main contribution is that the proposed event-based protocol can achieve consensus and meanwhile reject disturbance, without the need of continuous communications among neighboring agents. For the case of neutrally stable agents, the event-based protocol is fully distributed, using only the local information of each agent and its neighbors. Simulation results are presented to illustrate the effectiveness of the theoretical results.     

教育部高校查新站工作现状调查

以教育部科技查新服务平台公布的年检报告和信息、教育部主办的2012年全国高校科技查新工作研讨会会议资料为主要信息和数据来源,辅以参考各高校科技查新网站公布的信息,从教育部高校科技查新站的设立、资源经费、队伍建设、管理和业务情况等方面,对高校科技查新工作的现状进行了调研分析,并对日后科技查新工作的发展提出了建议。     

Adaptive fuzzy CMAC-based nonlinear control with dynamic memory architecture

An adaptive fuzzy cerebellar model articulation controller-based (CMAC) nonlinear control with the advantage of architecture learning is proposed. To cope with the tradeoff between the complexity of CMAC architecture and the quality of system convergence, a dynamic architecture learning scheme is introduced, where the associative memory reinforcement and the associative memory reorganization are involved. In the memory reinforcement process, new associative memories will be generated when the memory cells in the current architecture are found insufficient. On the other hand, the inefficient memories will be detected and reorganized in the memory reorganization process. With the proposed approach, the task of fuzzy CMAC architecture determination by preliminary knowledge or trials can be freed when a well-organized and well-parameterized CMAC is represented to achieve desired approximation performance. Thus, with the proposed CMAC, a dynamic control approach is presented. In this paper, according to the adaptive control theory, the fuzzy CMAC (FCMAC) is utilized as the main controller to mimic the ideal computation controller and a supervisory controller is designed to compensate the approximation error. In the FCMAC, all the controller parameters are online tuned based on the Lyapunov stability theorem such that the stability of closed-loop system can be guaranteed. Simulation results and comparisons are presented for verification.     

浅议我国企业海外投资风险防范对策——以TCL并购法国汤姆逊案为例

近年来,随着我国对外贸易的不断发展,我国企业的海外投资规模也在持续扩大,但海外投资依然面临多重风险,必须进行有效的风险防范。本文以TCL并购法国汤姆逊案为例,分析了其进行海外投资所面临的主要风险,并提出了几点防范海外投资风险的对策。     

系统发育和被子植物“多系-多期-多域”系统——兼答傅德志的评论

历史地回顾了谱系、系统发育、单系、多系概念的由来和发展。详细讨论了单系(monophyly )和多系(polyphyly)在叙述分类群起源和描述分类群内部系统发育线多样性的不同含义。以此为基础,说明在“多系_多2_多域”的八纲系统中“多系”和“单系”是指自然分类群内系统发育线的多样性,不等同于“多源”和“单源”。通过与近年来所发表的被子植物分类系统的比较,认为基于化石、形态、分子和地理分布证据提出的八纲系统所显示的预言性,必将在今后的科学实践中经受检验。     

Ecological principle meets cancer treatment: treating children with acute myeloid leukemia with low-dose chemotherapy

Standard chemotherapy regimens for remission induction of pediatric acute myeloid leukemia (AML) are associated with significant morbidity and mortality. We performed a cohort study to determine the impact of reducing the intensity of remission induction chemotherapy on the outcomes of selected children with AML treated with a low-dose induction regimen plus granulocyte colony stimulating factor (G-CSF) (low-dose chemotherapy (LDC)/G-CSF). Complete response (CR) after two induction courses was attained in 87.0% (40/46) of patients receiving LDC/G-CSF. Post-remission therapy was offered to all patients, and included standard consolidation and/or stem cell transplantation. During the study period, an additional 94 consecutive children with AML treated with standard chemotherapy (SDC) for induction (80/94 (85.1%) of the patients attained CR after induction II, P = 0.953) and post-remission. In this non-randomized study, there were no significant differences in 4-year event-free (67.4 vs. 70.7%; P = 0.99) and overall (70.3 vs. 74.6%, P = 0.69) survival in the LDC/G-CSF and SDC cohorts, respectively. After the first course of induction, recovery of white blood cell (WBC) and platelet counts were significantly faster in patients receiving LDC/G-CSF than in those receiving SDC (11.5 vs. 18.5 d for WBCs (P < 0.001); 15.5 vs. 22.0 d for platelets (P < 0.001)). To examine the quality of molecular response, targeted deep sequencing was performed. Of 137 mutations detected at diagnosis in 20 children who attained hematological CR after two courses of LDC/G-CSF (n = 9) or SDC (n = 11), all of the mutations were below the reference value (variant allelic frequency <2.5%) after two courses, irrespective of the treatment group. In conclusion, children with AML receiving LDC/G-CSF appear to have similar outcomes and mutation clearance levels, but significantly lower toxicity than those receiving SDC. Thus, LDC/G-CSF should be further evaluated as an effective alternative to remission induction in pediatric AML.     

意愿调查法中的偏好不确定性研究综述

对非市场物品和服务,如环境改善和资源保护,进行经济价值评估是学术界面临的一大难题。意愿调查法（Contingent Valuation Method, CVM）作为非市场物品经济价值评估的一种重要方法,其方法论在不断地接受检验并得到改进,近年来一个重要进展是其分析框架由确定偏好假设向不确定偏好假设转变。为系统认识国际上对CVM中受访者偏好不确定性的研究进展、推动国内相关研究,本文在简单介绍产生不确定结果的原因和不确定偏好假设下标准CVM不足的基础上,系统梳理了不确定偏好的测度方法和不确定偏好下价值计算方法,分析了各种方法的优劣以及考虑不确定性对价值估计值大小和估计效率的影响。总体来看,不确定偏好假设已基本形成共识,个人支付意愿应为随机变量也得到广泛支持。多数学者认为借助一定的测度技术获取的不确定性信息是有价值的,而如何更准确地测度和利用偏好不确定程度以提高资源环境等非市场物品价值估计效率应是今后研究的重点。最后,针对既有研究存在的问题,从加强个人偏好及不确定性的异质性研究、改进问卷设计等方面提出对未来研究工作的建议。