一种物联网能耗监测计量终端的设计     

张喜生  岑宏杰 《深圳职业技术学院学报》2015,(1):7-11

设计了一种应用于物联网能耗监测系统的无线计量终端方案,该计量终端的核心电路由微控制器STM8L152和电能计量单元ATT7053构成,无线收发器使用CC1101,使用软件Atom Threads作为操作系统,并移植TI的Simplici TI无线网络协议,可以实时计量用电设备的用电量、液晶显示电压、电流、功率等电参数,定时保存数据并通过433MHz无线通信上报给数据网关和服务器.计量终端也支持现场红外通信抄表.  相似文献   

It doesn’t matter,but: examining the impact of ambient learning displays on energy consumption and conservation at the workplace     

Dirk Börner  Marco Kalz  Marcus Specht 《Environmental Education Research》2015,21(6):899-915

This study reports an intervention to initiate environmental learning and facilitate pro-environmental behaviour. The purpose was to examine the impact of ambient learning displays on energy consumption and conservation at the workplace, more specifically the evaluation of learning outcome and behaviour change. Using a quasi-experimental design, the empirical study was conducted among employees working at a university campus. For the experimental treatments, ambient learning display prototypes were varied on two design dimensions, namely representational fidelity and notification level. The results do not provide clear evidence that the design of the displays influences learning outcome or that the displays lead to pro-environmental behaviour change. Nevertheless, the sole deployment of the display prototypes eased the comprehension of the information provided and lowered the need for additional information. Thus, ambient learning displays provide a promising framework in the context of environmental learning and beyond.  相似文献   

A low-cost method for estimating energy expenditure during soccer refereeing     

Luca Paolo Ardigò  Johnny Padulo  Andrea Zuliani  Carlo Capelli 《Journal of sports sciences》2015,33(17):1853-1858

This study aimed to apply a validated bioenergetics model of sprint running to recordings obtained from commercial basic high-sensitivity global positioning system receivers to estimate energy expenditure and physical activity variables during soccer refereeing. We studied five Italian fifth division referees during 20 official matches while carrying the receivers. By applying the model to the recorded speed and acceleration data, we calculated energy consumption during activity, mass-normalised total energy consumption, total distance, metabolically equivalent distance and their ratio over the entire match and the two halves. Main results were as follows: (match) energy consumption = 4729 ± 608 kJ, mass normalised total energy consumption = 74 ± 8 kJ · kg^?1, total distance = 13,112 ± 1225 m, metabolically equivalent distance = 13,788 ± 1151 m and metabolically equivalent/total distance = 1.05 ± 0.05. By using a very low-cost device, it is possible to estimate the energy expenditure of soccer refereeing. The provided predicting mass-normalised total energy consumption versus total distance equation can supply information about soccer refereeing energy demand.  相似文献   

Energy cost and kinematics of level,uphill and downhill running: fatigue-induced changes after a mountain ultramarathon     

Gianluca Vernillo  Aldo Savoldelli  Andrea Zignoli  Spyros Skafidas  Alessandro Fornasiero  Antonio La Torre 《Journal of sports sciences》2015,33(19):1998-2005

This study aimed to determine whether the fatigue induced by a mountain ultramarathon (MUM) led to changes in energy cost and kinematic during level and graded running. Pre- and post-race, 14 ultratrail runners ran on a level, uphill (5%) and downhill (5%) treadmill at 10 km · h^?1. Kinematic data were acquired using a photocell system. Post-race, the downhill energy cost increased by 13.1% (P < 0.001). No change was noted in level and uphill running. Duty factor and stride frequency were increased, whereas swing time, cycle time and stride length were decreased in all conditions (P < 0.05). Contact time was increased and the rate of force generation was decreased only in the uphill and downhill conditions (P < 0.05). Positive correlations were observed between performance time and the pre- to post-changes in the energy cost of level (r = 0.52, P = 0.04) and uphill running (r = 0.50, P = 0.04). MUM-induced fatigue resulted in physiological and spatiotemporal changes, though the response to fatigue varied considerably between running conditions. These changes resulted in a significant increment only in the downhill energy cost. Incorporating downhill locomotion in the training programmes of ultratrailers may help to improve performance-related physiological and biomechanical parameters.  相似文献   

地球上某点处波动式螺线能量场理论和物质的螺线生长机理研究(Ⅱ)——波动式螺线引力场和波动式螺线光线场分析及与金字塔等现象的关联性     

李嘉  李琳  张波  张勇军  李钦豪 《广东教育学院学报》2014,(3):48-54

在《地球上某点处波动式螺线能量场理论和物质的螺线生长机理研究(Ⅰ)》一文中分析了太阳、月球、七大行星相对于地球上某点的理想波动式螺线运动轨迹.采用该轨迹作为太阳、月球、七大行星在地球上某点处波动式螺线能量场理论模型,并取用同样的修正方法.概括地球上某点处波动式螺线能量场模型的性质和波动属性,用地球上某点处波动式螺线能量场描述太阳系天体-地球引力场与光线场;分析波动式螺线引力场引力大小与方向;分析波动式螺线光线场,提出波动式螺线能量场螺线轨迹,其实为自然光能量的传播和获取路径;以地球上某点处波动式螺线能量场理论和模型分析金字塔结构、能量现象和自然光子的波动式螺线光线场的相关性.并分析了彩虹弯曲的原因,分析了生命形状与功能相关等自然现象.  相似文献   

Complete Charging for Piezoelectric Energy Harvesting System     

樊康旗  徐春辉  王卫东 《天津大学学报(英文版)》2014,(6):407-414

Under an in-phase assumption, the complete charging for an energy harvesting system is studied, whichconsists of a piezoelectric energy harvester （PEH）, a bridge rectifier, a filter capacitor, a switch, a controller and arechargeable battery. For the transient charging, the results indicate that the voltage across the filter capacitor increasesas the charging proceeds, which is consistent with that reported in the literature. However, a new finding shows thatthe charging rate and energy harvesting efficiency decrease over time after their respective peak values are acquired.For the steady-state charging, the results reveal that the energy harvesting efficiency can be adjusted by altering thecritical charging voltage that controls the transition of the system. The optimal energy harvesting efficiency is limitedby the optimal efficiency of the transient charging. Finally, the relationship between the critical charging voltage andthe equivalent resistance of the controller and rechargeable battery is established explicitly.  相似文献   

“高考户籍制”：彻底终结还是有限松绑？     

韩娟  刘希伟 《青岛大学师范学院学报》2014,(11):62-68

“高考户籍制”是中国高考区别于世界各国大学招考制度的最显著特征之一．其历史原型可追溯至科举时代的“科举户籍制”;至民国及新中国初期,即已实行一种基本的高考户籍制。在大规模人口流动已成为中国社会常态特征的背景下,这一制度面临前所未有的合法性危机。高考户籍制问题的本质在于分省定额录取,户籍并非其真正根源,因此当前不应通过“一刀切”方式在全国范围内将之彻底终结,改革应根据各省实际,因地制宜,稳步推进。  相似文献   

Solving a conservation problem: The treatment of a batch of century-old Chinese manuscripts printed with fugitive red grid-lines     

Angela Waisum Liu  Martina Yeeman Ho  Chunying Lai 《文物保护研究》2014,59(5):S248-S249

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试析中国特色社会主义生态文明建设的逻辑架构     

刘贺 《绥化学院学报》2014,(2):14-18

生态文明、美丽中国、中国梦,已经成为当下的高频词汇.要把这些美好愿景和宏伟蓝图变成现实,一个很重要的方面,就是要廓清中国特色社会主义生态文明建设的逻辑架构,即需要坚持和发展中国特色社会主义,遵照“一条主线、两型社会、三大力量、四种文明、五位一体”的框架体系,以维护人民群众的生态权益和保障人民群众日益增长的生态需求,努力建设美丽中国,实现中华民族永续发展的“中国梦”为价值旨归.为实现中华民族伟大复兴的中国梦筑牢生态之基,同心共筑中国梦.  相似文献   

广西壮锦图案在书籍装帧中的运用     

蒙建维 《湖北第二师范学院学报》2014,(3):75-77

书籍装帧的最终设计目标是使书籍更具艺术性,充满感染力,以打动消费者、阅读者的知觉,最终产生购买行为,从而促进宣传的效果.广西壮锦图案以点、线、面为基本形态,运用平铺和穿插点缀的样式构成概括、简练、明了的图形、符号,能有效而恰当地反映书籍的内容和特色.现代书籍设计中越来越多地用其图案作为设计元素,诉求表达书籍设计的表现内容,增强展示视觉效果.  相似文献