LED照明技术在城市照明领域的应用前景

50年前人们已经了解半导体材料可产生光线的基本知识,第一个商用二极管产生于1960年。LED是英文light emitting diode（发光二极管）的缩写,它的基本结构是     

Energy consumption per unit GDP first turned from increase to decrease——National Bureau of Statistics of China released indexes of energy consumption in 2006

The ＂Report on Analysis and Forecast for National Situation of Power Supply and Demand and Economical Operation＂ issued by Chinese Electricity Council on April 29 revealed that the national industrial electricity consumption in the first quarter of 2007 amount to 540.016 TWh, or 16.83 % higher than the same period of 2006. The electricity consumptions by light and heavy industries increase by 11.49% and 18.10 % respectively. The growths of electricity demand by main products of fixed assets investments represented by those in iron ＆ steel, non-ferrous metal, chemical industry, construction materials, architectural industry and etc. are even more outstanding.     

新闻与动态

2007无线工厂应用高峰论坛将在北京举办2007无线工厂应用高峰论坛(Wireless in Factory Forum 2007,WFF2007)已确定于6月11日在北京举办。WFF论坛由CONTROL ENGINEERING China创办于2005年,每     

2007上海国际防爆工业展圆满结束

2007上海国际石油石化天然气管道储运及防爆工业展会于2007年3月15～17日在上海光大会展中心胜利召开。     

18项电工类国家标准批准发布

国家质量监督检验检疫总局、国家标准化管理委员会于2007年7月26日发布《中华人民共和国国家标准批准发布公告2007     

宁夏电力技术信息网2007年工作会议圆满结束

宁夏电力技术信息网"2007年工作会议于2007年11月29日～30日在宁夏银川供电局召开.     

A flexible capacitive photoreceptor for the biomimetic retina

Neuromorphic vision sensors have been extremely beneficial in developing energy-efficient intelligent systems for robotics and privacy-preserving security applications.There is a dire need for devices to mimic the retina's photoreceptors that encode the light illumination into a sequence of spikes to develop such sensors.Herein,we develop a hybrid perovskite-based flexible photoreceptor whose capacitance changes proportionally to the light intensity mimicking the retina's rod cells,paving the way for developing an efficient artificial retina network.The proposed device constitutes a hybrid nanocomposite of perovskites(methyl-ammonium lead bromide)and the ferroelectric terpolymer(polyvinylidene fluoride trifluoroethylene-chlorofluoroethylene).A metal-insulator-metal type capacitor with the prepared composite exhibits the unique and photosensitive capacitive behavior at various light intensities in the visible light spectrum.The proposed photoreceptor mimics the spectral sensitivity curve of human photopic vision.The hybrid nanocomposite is stable in ambient air for 129 weeks,with no observable degradation of the composite due to the encapsulation of hybrid perovskites in the hydrophobic polymer.The functionality of the proposed photoreceptor to recognize handwritten digits(MNIST)dataset using an unsupervised trained spiking neural network with 72.05%recognition accuracy is demonstrated.This demonstration proves the potential of the proposed sensor for neuromorphic vision applications.     

威强2007低功耗嵌入式解决方案研讨会在京召开

威强与北京经销北京威达通于2007年4月24日首度共同举办“IEI Embedded Technology 2007之IEI嵌入式技术解决方案研讨会”     

21项电工类机械行业标准批准发布

国家发展和改革委员会于2007年5月29日发布《中华人民共和国国家发展和改革委员会公告2007年第32号》。批准、     

4项电工类机械行业标准批准发布

国家发展和改革委员会于2007年8月1日发布《中华人民共和国国家发展和改革委员会公告2007年第45号》。批准、