高校医学学报重点号组稿模式的建立与思考——以《山东大学学报(医学版)》为例     

顾黎  陈斌  周英智 《中国科技期刊研究》2018,29(7):739-744

【目的】 总结笔者所在期刊组织专题/专刊(以下简称“重点号”)的工作模式，为高校医学学报实现规模化组稿提供参考。【方法】 比较《山东大学学报(医学版)》2016—2017年刊发的7个重点号中的约稿及同卷期自由来稿的下载频次和被引频次，分析重点号的刊出效果。回顾重点号的组织过程，总结组稿模式，归纳要点，反思不足。【结果】 重点号约稿的篇均下载频次和被引频次分别是同卷期自由来稿的2.74倍和6.00倍，基本实现预期的约稿效果。《山东大学学报(医学版)》通过两年多的实践，建立了适合自身发展的重点号组稿模式，主编和编委的办刊热情得到了有效激发，组稿达到较大规模，办刊进入良性循环。【结论】 建立的重点号组稿模式可以明显提升期刊的学术影响力，具有较强的可操作性和可复制性；高校医学学报可以通过主动建立适合自身发展的组稿模式，突破办刊困境。  相似文献   

On my honor: creating space for thinking and living Girl Scouts differently in (post)colonial Hawai‘i     

Patricia Espiritu Halagao  Julie Kaomea 《Gender and education》2018,30(7):866-881

Girl Scouts aims to foster leadership by encouraging girls to discover themselves, make connections, and take action to make the world better. This paper chronicles the five-year journey of eight professional mothers of color who sought to provide their daughters with a space to ‘think and live differently’ as Girl Scouts and young women of color in (post)colonial Hawai‘i. Through questionnaires and a semi-structured focus group interview, mothers reflect on their original intentions to create a ‘safe space’ for their daughters to engage with the politics of gender, race, and class and to rethink, review, and rework their identities. Mothers’ reflections reveal success in creating safe spaces for the critical analysis of gender, but comparatively less success in critical analyses of race and class – a phenomenon that the mothers suggest may have been complicated by (1) the enduring myth of Hawai‘i as a multicultural paradise, (2) Girl Scouts’ assimilationist history, and (3) the mothers’ own relatively privileged positions.  相似文献   

Observer-based decentralized control of large-scale stochastic high-order feedforward systems with multi time delays     

Liang Liu  Shengyuan Xu  Xue-Jun Xie  Bing Xiao 《Journal of The Franklin Institute》2019,356(16):9627-9645

This paper investigates the problem of observer-based decentralized control for a class of large-scale stochastic high-order feedforward systems with multi time delays. By using the homogeneous domination idea and constructing the implementable observer, the decentralized output-feedback controller design scheme is firstly proposed. Then, with the aid of stochastic time delay system stability theory, the globally asymptotically stable in probability of the closed-loop system is verified by selecting an appropriate Lyapunov–Krasoviskii functional. Finally, an example is provided to demonstrate the efficiency of the proposed design method.  相似文献   

两种大强度间歇训练对优秀公路自行车运动员有氧能力的影响          下载免费PDF全文

屈成刚  唐一丹 《体育科研》2019,(1):64-71

目的：比较两种大强度间歇训练手段对优秀自行车运动员有氧运动能力的影响。方法：将15名备战全国“十三运”的云南省自行车队男子运动员随机分为3组， S组训练方案采用SIT/耐力训练， H组训练方案采用HIIT/耐力训练， C组为对照组，进行传统耐力性训练；训练持续3周。训练前后进行递增负荷测试和有氧运动能力测试，测试指标包括最大摄氧量绝对值（VO2max）、最大摄氧量相对值（VO2max/kg）、每分通气量（VE）、最大心率（HRmax），并通过公式计算每搏输出量（SV），以及测试递增负荷后即刻血乳酸（BLA）、最大有氧功率（P）和40 km个人计时成绩进行了测试。结果：（1）3周训练后，S组运动员VE、HRmax、SV、VO2max、VO2max/kg、P和ITT40km均较训练前有显著性提高（P＜0.05）；H组运动员VE、VO2max/kg、ITT40km较训练前有显著性增加（P＜0.05），BLA有显著性的下降（P＜0.05）。（2）S组运动员ΔVE、ΔHRmax、ΔSV、ΔVO2max、ΔVO2max/kg、ΔBLA、ΔITT40km显著提升（P＜0.05），且优于其余两组；H组仅ΔITT40km存在明显提升（P＜0.05）。结论：间歇训练结合耐力训练对优秀公路自行车运动员的呼吸系统、有氧供能系统可产生积极的影响；而且，SIT结合耐力训练较HIIT结合耐力训练或传统耐力训练更能提高公路自行车运动员的有氧代谢能力和有氧运动能力，训练效果更佳。  相似文献   

A whitewashed curriculum? The construction of race in contemporary PE curriculum policy     

Fiona Dowling  Anne Flintoff 《Sport, Education and Society》2018,23(1):1-13

Analyses of curricula in a range of countries show how they tend to reinforce, rather than challenge, popular theories of racism. To date, we know little about the contribution of physical education (PE) curriculum policy to the overall policy landscape. This paper examines the construction of race and racism in two national contexts (Norway and England) as a means of putting race and anti-racism on the PE policy research agenda. It adopts a critical whiteness perspective to analyse how whiteness, as a system of privilege, contributes to the racialisation of valued knowledge in PE and asks, who potentially benefits and/or is marginalised within the learning spaces available in the texts? The discourse analysis reveals that two discursive techniques of whiteness combine to privilege white, Eurocentric knowledge content. Unmarked white PE practices and students are constructed as universal, normative and contingent. As a result, non-white PE practices and students are positioned on the margins in contemporary policy texts. By revealing the racialisation processes evident in the texts, we aim to trouble the profession's taken-for-granted truths about race in PE as integral to working towards the development of an antiracist subject.  相似文献   

Effects of increased participation on veteran running performance     

Bernard Cerutti 《Journal of sports sciences》2018,36(7):797-801

Contrary to elite performance that is approaching an asymptote, recent analyses suggested a trend for improvement in veterans. This might be attributable to a disproportionate increase in older age-group participation. We extracted 26 years (1987–2012) of men’s results of a running event in Switzerland, “La Course de l’Escalade” (7.25 km). We investigated trends in performance by five-year age-groups, taking the 10, 20, 30, and 50 fastest in each group, and then the 1^st, 5^th, and 10^th percentiles. Taking the 10, 20, 30 or 50 fastest runners there was a trend for improvement ranging from 0.07 to 0.22 min·year^?1 (p < .0001; 95% CI ?0.083 to ?0.049 and p < .0001; 95% CI ?0.250 to ?0.196 respectively) in the elder age-groups. Taking the 1^st, 5^th, and 10^th percentiles there were no trends for improvement, and actual deteriorations up to 0.13 (p < .0001; 95% CI +0.119 to +0.138) min·year^?1. Mixed-effect models with repeated measures for runners, confirmed a global deteriorating trend with an estimate of +0.11 min·year^?1 (p < .0001; 95% CI +0.107 to +0.116). The results suggest that increases in performance in older runners arise from modifications of sampling from a growing population.  相似文献   

Synergetic governing controller design for the hydraulic turbine governing system with complex conduit system     

Jianzhong Zhou  Yuncheng Zhang  Yang Zheng  Yanhe Xu 《Journal of The Franklin Institute》2018,355(10):4131-4146

The hydraulic turbine governing system plays an indispensable role in maintaining the stability of electrical power system. In this paper, synergetic control theory is introduced to enhance the regulating ability of the hydraulic turbine governing system. For the purpose of describing the characteristics of objective system and deducing the synergetic control rule, a nonlinear mathematic model of a hydraulic turbine governing system with long tail race and two surge tanks is established. Furthermore, the nonlinear characteristic of the hydraulic turbine is described by six variable partial derivatives. For further investigation, the hydraulic turbine governing system is conducted to running under load condition when its coaxial generator connects to an infinite bus. Simulation experiments have been made under both load disturbance and three-phase short circuit fault conditions to compare the dynamic performances of proposed synergetic governing controller and classic PID controller. The results indicate that the proposed synergetic governing controller is an effective alternative in normal condition and a superior one in emergency. Moreover, the robustness of synergetic governing controller has also been discussed at the end of this paper.  相似文献   

New insights in stability analysis of delayed Lotka–Volterra systems     

Xu-Guang Li  Jun-Xiu Chen  Silviu-Iulian Niculescu  Arben Çela 《Journal of The Franklin Institute》2018,355(17):8683-8697

Most of the reported Lotka–Volterra examples have at most one stability interval for the delay parameters. Furthermore, the existing methods fall short in treating more general case studies. Inspired by some recent results for analyzing the stability of time-delay systems, this paper focuses on a deeper characterization of the stability of Lotka–Volterra systems w.r.t. the delay parameters. More precisely, we will introduce the recently-proposed frequency-sweeping approach to study the complete stability problem for a broad class of linearized Lotka–Volterra systems. As a result, the whole stability delay-set can be analytically determined. Moreover, as a significant byproduct of the proposed approach, some Lotka–Volterra examples are found to have multiple stability delay-intervals. To the best of the authors’ knowledge, such a characterization represents a novelty for having some insights in the population dynamics: in some situations, a longer maturation period of species is helpful for the stability of a population system.  相似文献   

Technology adoption,consumer inattention and heuristic decision-making: Evidence from a UK district heating scheme     

Andrew Burlinson  Monica Giulietti  Giuliana Battisti 《Research Policy》2018,47(10):1873-1886

This paper contributes to the debate on the energy efficiency paradox according to which consumers fail to adopt cost-effective, energy efficient technologies over less efficient technologies and therefore fail to reduce energy consumption. Both traditional and behavioural theories are used to investigate the decision-making process of residential consumers with empirical evidence based upon a specially designed quasi-experimental survey of 784 households on the decision to connect to a district-heating system, a more energy efficient alternative to individual heating systems. The results suggest an internal discount rate of around 36 per cent for homeowners, a signal that consumers undervalue future energy costs. We also find the household’s decision to be negatively affected by years of payback up to around 7–8 years. Our findings suggest that neglecting consumer inattention and heuristics can lead to biases which cast doubt on the existence of the energy efficiency paradox. We believe that these results help to explain why some consumers are unlikely to invest in energy efficient technology, particularly those on low incomes.  相似文献   

Corrigendum to “Crossing the innovation threshold through mergers and acquisitions” [Res. Policy 44 (2015) 698–710]     

Elena Cefis  Orietta Marsili 《Research Policy》2018,47(9):1870

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