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光学学报 2003年第S1期23卷 621-622页

作者： Samrat Ganguly Rauf Izmailov Nan Tu Ting Wang nec Laboratories America Princeton USANEC Laboratories America Princeton USANEC Laboratories America Princeton USANEC Laboratories America Princeton USA

We propose a cascade system of filters for realizing a non-uniform waveband separation for optical networks. The use of such separation is required at the DEMUX stage in a optical OXC switching wavebands. The design o... 详细信息

关键词： of as Cr with be Efficient Design of Multi-stage Cascade Waveband Separator tree

China ASON Network Migration Scenarios and Their Quantitative Analysis

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光学学报 2003年第S1期23卷 667-668页

作者： Soichiro Araki Itaru Nishioka Yoshihiko Suemura Networking Research Laboratories NEC CorporationNetworking Research Laboratories NEC CorporationNetworking Research Laboratories NEC Corporation

This paper proposes two migration scenarios from China ring networks to ASON mesh networks. In our quantitative analysis with ASON/GMPLS simulator, a subnetwork protection scheme achieved best balanced performance in ... 详细信息

关键词： ASON it from for be In of China ASON Network Migration Scenarios and Their Quantitative Analysis LSC

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nec电子保护板功率器件

电子技术应用 2008年第11期34卷 6-7,11页

作者：刘亚辉 nec电子

节能环保的锂电池应用日趋广泛,用于锂电池保护板的功率器件更新也突飞猛进。针对锂电池,nec 电子使用最新工艺和封装技术研发了一系列应用于锂电池保护板电路的产品,其中的芯片级封装(CSP)产品是已经批量应用的最小封装产品。

关键词：锂电池功率器件芯片级封装节能环保

Mining Sensor Data in Cyber-Physical Systems

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Tsinghua Science and Technology 2014年第3期19卷 225-234页

作者： Lu-An Tang Jiawei Han Guofei Jiang the nec Laboratory America the Department of Computer Science University of Illinois at Urbana-Champaign

A Cyber-Physical System （CPS） integrates physical devices （i.e.,sensors） with cyber （i.e.,informational） components to form a context sensitive system that responds intelligently to dynamic changes in real-world *** a system has wide applications in the scenarios of traffic control,battlefield surveillance,environmental monitoring,and so on.A core element of CPS is the collection and assessment of information from noisy,dynamic,and uncertain physical environments integrated with many types of cyber-space *** potential of this integration is *** achieve this potential the raw data acquired from the physical world must be transformed into useable knowledge in ***,CPS brings a new dimension to knowledge discovery because of the emerging synergism of the physical and the *** various properties of the physical world must be addressed in information management and knowledge *** paper discusses the problems of mining sensor data in CPS：With a large number of wireless sensors deployed in a designated area,the task is real time detection of intruders that enter the area based on noisy sensor *** framework of IntruMine is introduced to discover intruders from untrustworthy sensor *** first analyzes the trustworthiness of sensor data,then detects the intruders＇ locations,and verifies the detections based on a graph model of the relationships between sensors and intruders.

关键词： cyber-physical system sensor network data trustworthiness

nec Environmental Initiative through IT

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NEC Environmental Initiative through IT

An improved HCI degradation model for a VLSI MOSFET

中日环境产业与环境经营研讨会

作者： Ryosuke UGO Environment Management Division NEC Corporation

＜正＞The big social movement for the "Sustainability" based on the global environmental problems, is making a new paradigm-shift toward the sustainable society. The Environmental Management of companies is making som...

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来源： cnki会议评论

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cnki会议

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Journal of Semiconductors 2009年第12期30卷 33-36页

作者：唐逸万星拱顾祥王文渊张会锐刘玉伟 Shanghai Integrated Circuit Research and Development Center Shanghai Hua Hong nec Electronics Company Ltd

An improved hot carrier injection （HCI） degradation model was proposed based on interface trap generation and oxide charge injection theory. It was evident that the degradation behavior of electric parameters such as Idlin, Idsat, Gm and Vt fitted well with this model. Devices were prepared with 0.35μm technology and different LDD processes. Idlin and Idsat after HCI stress were analyzed with the improved model. The effects of interface trap generation and oxide charge injection on device degradation were extracted, and the charge injection site could be obtained by this method. The work provides important information to device designers and process engineers.

关键词： HCI degradation model interface traps oxide charge

Purcell effect of GaAs quantum dots by photonic crystal microcavities

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Chinese Optics Letters 2009年第10期7卷 879-881页

作者： Kazuaki Sakoda Takashi Kuroda NaokiI keda Takaaki Mano Yoshimasa Sugimoto Tetsuyuki Ochiai Keiji Kuroda Shunsuke Ohkouchi Nobuyuki Koguchi Kiyoshi Asakawa National Institute for Materials Science Japan Graduate School of Pure and Applied Sciences University of Tsukuba nec Corporation

We fabricate photonic crystal slab microcavities embedded with GaAs quantum dots by electron beam lithography and droplet epitaxy. The Purcell effect of exciton emission of the quantum dots is confirmed by the micro photoluminescence measurement. The resonance wavelengths, widths, and polarization are consistent with numerical simulation results.

关键词： GaAs Purcell effect of GaAs quantum dots by photonic crystal microcavities QDs

LLR calculation for LDPC coded SCBT in 60 GHz WPAN

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Journal of Systems Engineering and Electronics 2010年第5期21卷 734-739页

作者： Lingjun Kong Yang Xiao Ming Lei Ye Huang Institute of Information Science Beijing Jiaotong University Beijing 100044 E R. China nec Laboratories NEC Corporation Beijing 100084 P. R. China Communications Technology Laboratories Intel China Research Center Beijing 100080 E R. China

The single-carrier block transmission（SCBT）,a.k.a.,single-carrier frequency-domain equalization（SC-FDE）,is being considered as an option technique for the wireless personal area network（WPAN） operating at 60 *** is found that for residential environment,in non-line-of-sight（NLOS） multi-path channels,the SCBT is much more effective to combat the inter-symbol interference（ISI） compared with orthogonal frequency division multiplexing（OFDM）.Low-density parity-check（LDPC） codes are a class of linear block codes which provide near capacity performance on a large collection of data transmission and storage channels while simultaneously admitting implementable *** facilitate using LDPC codes for SCBT system,a new log-likelihood ratio（LLR） calculation method is proposed based on pilot symbols（PS）.Golay Sequences whose sum autocorrelation has a unique peak and zero sidelobe are used for creating the *** position and length of the PS are not fixed in the data *** simulation results show that the proposed method can significantly improve the LDPC decoding performance in SCBT *** is very promising to support ultra high-data-rate wireless transmission.

关键词： single-carrier block transmission single-carrier frequency-domain equalization low-density parity-check code log-likelihood ratio wireless personal area network.

nec优秀的网络规划优化方案助力运营商快速打造3G精品网

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电信科学 2005年第5期21卷 i011-i012页

随着2004年3G在全球范围内突飞猛进的发展,以及中国信息产业部组织的3G网络试验的成功开展,3G在中国的推进进程明显加快.3G一旦拍板,网络规划与设计将成为3G运营商网络建设中关注的重中之重.

关键词： nec公司网络规划 3G网络 UMTS 网络优化