检索结果-内蒙古大学图书馆

2009 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2009

作者： Jianyun, Hu Yunliang, Zhu Shang, Wang Hui, Wu Laboratory for Advanced Integrated Circuits and Systems Department of Electrical and Computer Engineering University of Rochester Rochester NY United States Qualcomm Corp. San Diego CA United States

ISBN: (纸本)9781424433780

This paper presents a low power impulse-radio ultra-wideband (IR-UWB) receiver based on a reconfigurable, high speed analog correlator called distributed pulse correlator (DPC). The DPC incorporates built-in local template pulse generation, and hence significantly reduces the power consumption and circuit complexity of the analog correlation receiver. A chip prototype of the IR-UWB receiver was implemented in 0.18-μ m standard digital CMOS, and achieved an energy efficiency of 0.17-nJ/pulse at 250-MHz pulse rate in the measurement. © 2009 IEEE.

关键词： CMOS integrated circuits

来源：评论

学校读者我要写书评

暂无评论

Notes on Data-driven System Approaches

引用

自动化学报 2009年第6期35卷 668-675页

作者： XU Jian-Xin HOU Zhong-Sheng Department of Electrical and Computer Engineering National University of Singapore Singapore 117576 Singapore Advanced Control Systems Laboratory School of Electronics and Information Engineering Beijing Jiaotong University Beijing 100044 P.R. China

In this paper, we present several considerations centered around the data-driven system approaches. We briefly explore three main issues: the evolving relationship between off-line and on-line data processing methods, the complementary relationship between the data-driven and model-based methods, and the perspectives of data-driven system approaches. Instead of offering solutions to data-driven system problems, which is impossible at the present level of knowledge and research, in this article we aim at categorizing and classifying open problems, exploring possible directions that may offer alternatives or potentials for the four key fields of interests: control, decision making, scheduling, and fault diagnosis.

关键词：数据驱动数据分析自动化系统分析方法

来源：评论

学校读者我要写书评

暂无评论

Microring resonator for glucose sensing applications

引用

Frontiers of Optoelectronics 2009年第3期2卷 304-307页

作者： Yao CHEN Zhengyu LI Huaxiang YI Zhiping ZHOU Jun YU Department of Electronic Science and Technology Huazhong University of Science and Technology Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology State Key Laboratory on Advanced Optical Communication Systems and Networks Peking University School of Electrical and Computer Engineering Georgia Institute of Technology

Silicon nitride microring resonators were demonstrated as chemical sensors. The microring devices,with diameter of 100 μm, were fabricated using complementary metal oxide semiconductor（CMOS）-compatible technology, and a high Q factor of 15000 was realized with free spectrum range（FSR） of 2 nm. The structures were further packaged to perform as chemical sensors, and their functionality was proved using deionized water（DI water）and ethanol as detecting mediums. Lastly, the packaged chips were used to detect glucose solutions with various concentrations, and a detection capability of refractive index change of 10–3refractive index unit（RIU） was obtained.

关键词： chemical sensor glucose sensing microring resonator Q factor refractive index unit (RIU)

来源：评论

学校读者我要写书评

暂无评论

Effect of the dipole-dipole interaction for two atoms with different couplings in a non-Markovian environment

引用

Physical Review A 2009年第1期79卷 012309-012309页

作者： Yang Li Jiang Zhou Hong Guo State Key Laboratory of Advanced Optical Communication Systems and Networks (Peking University) School of Electronics Engineering and Computer Science Peking University Beijing 100871 China

Using a nonperturbative method, we study the exact entanglement dynamics of two two-level dipole-dipole interacting atoms coupled to a common non-Markovian reservoir with different coupling strengths. Besides analyzing the conditions for the existence of a steady state, we find that, although the dipole-dipole interaction could destroy the stationary entanglement, a relatively strong dipole-dipole interaction does suppress disentanglement in the initial period of time. These results are helpful for the practical engineering of entanglement in the future.

关键词： Dipole moment

来源：评论

学校读者我要写书评

暂无评论

User-Level Virtual Network Support for Sky Computing

User-Level Virtual Network Support for Sky Computing

引用

IEEE International Conference on e-Science and Grid Computing

作者： Maurício Tsugawa Andréa Matsunaga José Fortes Advanced Computing and Information Systems Laboratory Department of Electrical and Computer Engineering University of Florida Gainesville FL USA

With the emergence of multiple cloud providers of Infrastructure-as-a-Service, it becomes possible to envision a near-future when high-performance computing users could combine services from different clouds to access huge numbers of resources. However, as more administrative privileges are exposed to end users, providers are required to deploy network security measures that present challenges to the network virtualization technologies that are needed to enable inter-cloud communication. This paper studies these challenges and proposes techniques to enable unmodified applications on resources across distinct clouds. The techniques are implemented in TinyViNe, an extension to ViNe, a virtual networking technology for distributed resources in different administrative domains. The results of evaluating TinyViNe on a WAN-based testbed across three sites are reported for a bioinformatics application (BLAST) and MPI benchmarks. The results confirm that TinyViNe enables cross-cloud computing while having little impact on application performance. TinyViNe also has auto-configuration and ¿download-and-run¿ capabilities for easy deployment by users who are not knowledgeable about networking.

关键词： computer networks Cloud computing Voice mail Bioinformatics Virtual manufacturing Isolation technology Protection Information systems Laboratories USA Councils

来源：评论

学校读者我要写书评

暂无评论

A 2.5 Gpulse/s, 25 pJ/pulse, 0.18μm CMOS Impulse Radio UWB Transmitter Based on Dual-Polarity Distributed Waveform Generator

A 2.5 Gpulse/s, 25 pJ/pulse, 0.18μm CMOS Impulse Radio UWB ...

引用

Topical Meeting on Silicon Monolithic Integrated Circuits in RF systems

作者： Yunliang Zhu Jianyun Hu Hui Wu Laboratory of Advanced Integrated Circuits and Systems Department of Electrical and Computer Engineering University of Rochester Rochester NY USA

In this paper, we present a fully-integrated impulse radio UWB transmitter based on a newly-developed ultrafast pulse circuit technique, distributed waveform generator (DWG). A DWG time-interleaves multiple digital pulse generators, and then combines all generated pulses using a wideband on-chip transmission line. A DWG is low power and fully reconfigurable compared to other UWB pulse generation and shaping solutions. It also facilitates the implementation of digital modulation schemes such as on-off keying (OOK) and pulse position modulation (PPM) in the transmitter. A chip prototype with a 10-tap, 10 GS/s dual-polarity DWG was designed and implemented in 0.18 mum standard digital CMOS. The transmitter's pulse rate can be varied from 16 MHz to 2.5 GHz with an energy efficiency of 25 pj/pulse. The transmitted pulses with OOK and PPM modulation are successfully demonstrated using 32 Mb/s PRBS data.

关键词： Radio transmitters Signal generators Pulse modulation Pulse generation Digital modulation Pulse circuits Wideband Power transmission lines Distributed parameter circuits Prototypes

来源：评论

学校读者我要写书评

暂无评论

Energy efficient, reconfigurable, distributed pulse generation and detection in UWB impulse radios

Energy efficient, reconfigurable, distributed pulse generati...

引用

IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB)

作者： Jianyun Hu Yunliang Zhu Shang Wang Hui Wu Laboratory of Advanced Integrated Circuits and Systems Department of Electrical and Computer Engineering University of Rochester Rochester NY USA

Ultrafast pulse generation and detection are pivotal functions in ultra-wideband (UWB) impulse radios. This paper shows that digitally-assisted distributed circuit techniques provide an energy-efficient, reconfigurable solution for both functions, as demonstrated in two new circuits: a pulse generator that can generate reconfigurable pulse waveforms with sub-nanosecond time resolution, and a multi-GHz analog correlator that incorporates reconfigurable local template pulse generation. A UWB impulse radio was developed based on these new circuits with chip prototypes implemented in 0.18-mum standard digital CMOS. It was characterized using UWB antennas, and achieved an energy efficiency of 25-pJ/pulse for the transmitter and 190-pJ/pulse for the receiver at 250 MHz pulse rate in the measurement.

关键词： Energy efficiency Pulse generation Pulse measurements Ultra wideband technology Pulse circuits Energy resolution Correlators Prototypes Standards development CMOS digital integrated circuits

来源：评论

学校读者我要写书评

暂无评论

Physical origin of data pattern inversion in optical injection-locked VCSELs

Physical origin of data pattern inversion in optical injecti...

引用

Frontiers in Optics, FiO 2009

作者： Yang, Weijian Guo, Peng Parekh, Devang Hofmann, Werner Amann, Markus C. Chang-Hasnain, Connie J. Department of Electrical Engineering and Computer Sciences University of California Berkeley CA 94720 United States State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Engineering and Computer Science Peking University Beijing 100871 China Walter Schottky Institute Technical University of Munich Am Coulombwall 3 85748 Garching Germany

The physical origin and criteria for adjustable data pattern inversion in optical injection locked VCSELs are explained with a novel model including the interference effect of master laser reflection. Simulation resul... 详细信息

ISBN: (纸本)9781557528780

关键词： Surface emitting lasers

来源：评论

学校读者我要写书评

暂无评论

Anomalous modulation characteristics of optical injection-locked VCSELs

Anomalous modulation characteristics of optical injection-lo...

引用

Asia Communications and Photonics Conference and Exhibition, ACP 2009

作者： Guo, Peng Yang, Weijian Parekh, Devang Hofmann, Werner Amann, Markus C. Chang-Hasnain, Connie J. Department of Electrical Engineering and Computer Sciences University of California Berkeley CA 94720 United States State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Engineering and Computer Science Peking University Beijing 100871 China Walter Schottky Institute Technical University of Munich Am Coulombwall 3 85748 Garching Germany

ISBN: (纸本)9781557528773

An anomalous DC-suppression in the small signal response is observed experimentally and its relationship with data pattern inversion is investigated for the first time. With the inclusion of a novel OIL reflection interference model, excellent agreement is obtained between the experiment results and theoretical analysis. © 2009 Optical Society of America.

关键词： Optical signal processing

来源：评论

学校读者我要写书评

暂无评论

Enhanced light-extraction in GaN light-emitting diode with binary blazed grating reflector

Enhanced light-extraction in GaN light-emitting diode with b...

引用

Photonics and Optoelectronics Meetings (POEM) 2008: Optoelectronic Devices and Integration

作者： Wenhua, Wu Huaming, Wu Tingwei, Wu Yi, Wang Zhiping, Zhoub Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan Hubei 430074 China State Key Laboratory on Advanced Optical Communication Systems and Networks Peking University Beijing 100871 China School of Electrical and Computer Engineering Georgia Institute of Technology Atlanta GA 30332 United States

ISBN: (纸本)9780819475381

Enhancement of light extraction in a GaN light-emitting diode (LED) employing a binary blazed grating reflector (BBGR) is presented. The BBGR consists of asymmetrically periodic structure etched on the GaN layer. Rigorous coupled-wave analysis (RCWA) is adopted to calculate the reflectivity of the BBGR, which shows that it has the characteristics of broadband reflection spectrum and very high reflectivity. The result of high angle-averaged reflectivity up to 94% from 300nm to 450nm predicts the potential enhancement of light-extraction efficiency of GaN LEDs with BBGR. © 2009 SPIE.

关键词： Reflection

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：