检索结果-内蒙古大学图书馆

8th International conference on Electromagnetics in Advanced applications, ICEAA 2003

作者： Torres, Robert J. Prather, William D. Baum, Carl E. Tran, Tyrone C. Burger, Jeffrey W. Air Force Research Laboratory Directed Energy Directorate 3550 Aberdeen United States

ISBN: (纸本)8882020096

-Ultra-Wideband (UWB) Microwave Sources and Antennas are of interest for a variety of uses such as mine detection and discrimination, unexploded ordnance (UXO) location and identification, transient radars, and even some types of communications. Much of the research is being performed at the Air Force Research Laboratory (AFRL) at Kirtland AFB, New Mexico. The development of new UWB sources and antennas has shown significant progress in recent years. In particular, research into UWB transient antennas and new lens technology has improved the performance of a number of other wideband systems including mine detectors, synthetic aperture radar (SAR), and transient radars. Also, recent advances in precision-triggered, solid-state and gas switches have opened up new possibilities for the design of high voltage arrays with better repetition rates. This paper reviews the progress to date along these lines and discusses new areas of research into UWB technology development.

关键词： Ultra-wideband (UWB)

来源：评论

学校读者我要写书评

暂无评论

Augmented extended nested array configuration for consecutive degrees of freedom enhancement 6

Augmented extended nested array configuration for consecutiv...

引用

6th International conference on Wireless Communications and applications, ICWCAPP 2022

作者： Hao, Honghao Chen, Luo Zhang, Xiaofei Li, Baobao Cao, Jinke Nanjing University of Aeronautics and Astronautics College of Electronic Information Engineering Nanjing210000 China Southeast University State Key Laboratory of Millimeter Waves Nanjing210096 China

ISBN: (纸本)9781665462907

With the increasing demand of the accuracy of direction of arrival (DOA) estimation, the spare array configurations have attracted considerable interest because of their ability of possessing increased array aperture and enhanced degrees of freedom (DOF). In this paper, we propose an augmented extended nested array (AENA) strategy based on the different co-array (DCA) theory. The AENA configuration consists of a sparse uniform linear array (ULA) and two sparse nonuniform linear arrays (NLAs) with sensor locations being determined by relative position. Compared with other existing sparse arrays, the significant advantage of AENA configuration is its ability of processing a higher number of consecutive DOF. And simulation results have confirmed the superiority that our proposed AENA configuration can furtherly reduce the root mean square error (RMSE) in DOA estimation, compared with the other nested-like array configurations. © 2022 IEEE.

关键词： Degrees of freedom (mechanics)

来源：评论

学校读者我要写书评

暂无评论

Comparison of Different Design Methodologies of Hardware-based Image Processing for Automation in Microrobotics

Comparison of Different Design Methodologies of Hardware-bas...

引用

IEEE/ASME International conference on Advanced Intelligent Mechatronics (AIM) - Mechatronics for Human Wellbeing

作者： Tiemerding, Tobias Diederichs, Claas Stehno, Christian Fatikow, Sergej Carl von Ossietzky Univ Oldenburg Div Microrobot & Control Engn D-26111 Oldenburg Germany

ISBN: (纸本)9781467353205

Object-detection and classification is a key task in micro-and nanohandling. The microscopy image is often the only available sensor to detect information about the positions and orientations of objects. FPGA-based image processing is superior to state of the art PC-based image processing in terms of achievable update rate, latency and jitter. development of specialized FPGA solutions for object detection and tracking using a hardware-description language is time consuming and requires deep knowledge of the target system. Using SystemC, a C++ based class library, fast implementation with less knowledge of the system is possible. However, the gain in development speed is accompanied by higher resource usage of the FPGA and lower performance regarding computation speed. In this paper, several image processing algorithms are implemented in both manners and are compared regarding achievable update-rate, resource consumption and development time. The SystemC implementations could be implemented twice as fast and with less knowledge about the system. The increased resource usage of SystemC is negligible for small series and prototyping applications, while the decreased computation speed may be problematic for high-speed applications.

关键词： field programmable gate arrays image processing microrobots

来源：评论

学校读者我要写书评

暂无评论

The past, present, and future of electronically-steerable phased arrays in defense applications

The past, present, and future of electronically-steerable ph...

引用

2008 IEEE Aerospace conference

作者： Rock, Janice C. Mullins, James H. Booth, Joel P. Hudson, Tracy USA Aviat & Missile Res Dev & Engn CtrDiv Appl Senso AMSRD AMR SG RF Rock Mullins & Booth AMSRD AMR WS ID HudsonAppl Sensors Guidance & El Redstone Arsenal AL 35898 USA

ISBN: (纸本)9781424414871

This paper will present a study of past issues associated with electronically-steerable phased array antenna systems and methods employed to overcome these issues. It will discuss the current state-of-the-art in these type systems and the benefits to defense applications that have resulted as these technologies have matured. It will conclude with a discussion of barriers and problems that still exist - inhibiting a full integration of phased array technologies in military communication systems, fire control and illumination radar systems, and missile seeker systems. The many benefits and high performance of these systems have caught the eye of many possible users and it is important to quickly deliver to the soldier these advanced technologies. Thus quick, solid technology maturation and problem solving is a must. An example of the barriers that will be explored in depth include the use of MEMS as a low-loss phasing network solution, strap-down guidance issues, radome problems, fabrication and integration issues and heat dissipation techniques. Possible solutions to the barriers discussed will be presented and explored and future directions in phased array technology development will be proposed.

关键词： Problem solving

来源：评论

学校读者我要写书评

暂无评论

development and test of an integrated microsystem for HPLC separation and detection using refractive index measurements

引用

sensorS AND ACTUATORS B-CHEMICAL 2004年第1-2期103卷 184-189页

作者： Brennan, D O'Brien, P O'Brien, J Freeman, N Swann, M NMRC Cork Ireland Farfield Sensors Ltd Unit 51 Manchester M6 6AJ Lancs England

In recent years optical waveguide sensors have been used for applications as biosensors and chemical sensors. Often the fluidic element of the sensor has a large working volume (mul) and full device integration is not undertaken. We look at a number of fabrication routes available to integrate microfluidic and optical detection components to achieve a fully integrated microsystem and highlight some of the technical issues arising in different integration strategies. Wafer and chip integration strategies using anodic, thin film and polymer bonding for the fluidic module and the optical sensor were investigated. The integrated microsystem was evaluated for fluidic and optical performance, integration showed no significant impact on performance of either component. The fluidic system presents a nanolitre detection volume offering reduced sample volumes in HPLC applications. Initial optical performance of the integrated structure was carried out using a refractive index measurement system, the Farfield Analight(R) Bio250. (C) 2004 Elsevier B.V. All rights reserved.

关键词： micro-fluidics micro-HPLC packaging refractive index

来源：评论

学校读者我要写书评

暂无评论

development of a new active personal dosimeter for use in space radiation environments

Development of a new active personal dosimeter for use in sp...

引用

2007 IEEE Aerospace conference

作者： Pinsky, Lawrence S. Chancellor, Jeffrey Univ Houston Dept Phys Houston TX 77204 USA

ISBN: (纸本)9781424405244

A new solid state detector, known as Medipix, developed by a consortium of academic institutions has been evolved from a technology originally created for use at the LHC at CERN in Geneva, Switzerland. This technology is being harnessed for use as an active personal dosimeter for space radiation applications. The pixel based technology embeds the entire required readout electronics for each pixel withing the pixel's 55 micron square footprint. That allows the seamless tiling of multiple arrays of detectors. Prototypes have been exposed to heavy ion beams at the HIMAC facility in Japan and at the Texas A&M cyclotron in the US. The results are very encouraging. Extensive experience is being gained in using the detectors with appropriate converters for simultaneous neutron dosimetry as well. Ultimate versions may be deployed that are both wireless and self-contained, as well as having a package size comparable to current passive personal dosimeters. Prospect are excellent for buildmig them into spacesuits, which would provide ground-based real-time monitoring of the detailed doses being taken by crew members during such high-risk periods as EVAs. These dosimeters could also be used as active area monitors in a variety of both space and ground-based applications. (1 2).

关键词： Radiation detectors

来源：评论

学校读者我要写书评

暂无评论

Intelligent multi-sensor arrays for next generation diagnostic biodevices 11

Intelligent multi-sensor arrays for next generation diagnost...

引用

11th International conference on Biomedical Electronics and Devices, BIODEVICES 2018 - Part of 11th International Joint conference on Biomedical Engineering Systems and Technologies, BIOSTEC 2018

作者： Ben-Yoav, Hadar Department of Biomedical Engineering Ben-Gurion University of the Negev Beer Sheva Israel

ISBN: (纸本)9789897582776

Redox molecules play an essential role in many biological pathways, including energy metabolism, biosynthesis, and cell respiration. Moreover, a specific spectrum of redox molecules (comprising their type, concentration, and redox state) is involved in the development of diseases, including cancer. Thus, profiling the redox spectrum in the body is highly beneficial for a wide range of biomedical applications, from in vivo diagnostics to in situ monitoring of cell metabolism. Yet, the fundamental challenge lies within the ability to efficiently extract and analyze physiologically and medically relevant information from redox molecules in biofluids. This paper will discuss the advantageous approach to rapidly and continuously monitor redox molecules in biofluids using electrochemical lab-on-a-chip biodevices. The current approaches will be discussed to selectively measure redox molecules from biofluids without diminishing the rapid and continuous monitoring capabilities of these translational biodevices, i.e., by simultaneously analyzing multiple diagnostic redox biomarkers in a stand-alone operation, without any sample pretreatment or elimination of other interfering molecules. Then, the promising approach of using intelligent multi-sensor arrays will be highlighted for the rapid detection of a spectrum of redox molecules and the current challenges impeding their important utilization for next generation biomedical diagnostic devices. Copyright © 2018 by SCITEPRESS – Science and Technology Publications, Lda. All rights reserved

关键词： Electrochemical sensors

来源：评论

学校读者我要写书评

暂无评论

Coplanar differential capacitively coupled contactless conductivity detection (CD-C4D) sensor for micro object inside fluidic flow recognization 19

Coplanar differential capacitively coupled contactless condu...

引用

19th International conference on solid-state sensors, Actuators and Microsystems, TRANSDUCERS 2017

作者： Thuy, Ha Tran Thi Quang, Loc Do Dau, Van Thanh Kim, Ngan Nguyen Thi Le Van, Chieu Aoyagi, Masahiro Kikuchi, Katsuya Bui, Tung Thanh Posts and Telecommunications Institute of Technology Hanoi Viet Nam Hanoi University of Science Vietnam National University Hanoi Viet Nam Sumitomo Chemical. Ltd Hyogo Japan University of Engineering and Technology Vietnam National University Hanoi Viet Nam Tsukuba Japan

ISBN: (纸本)9781538627310

In this paper, we present a coplanar differential capacitively coupled contactless conductivity detection (CD-C4D) structure for the detection of tiny objects with dimension in micro scale. The differential capacitance changed due to the occurrence of an object in micro scale in is detected and used to recognize the presence as well as properties (i.e., electrical property and moving speed) of the object in fluidic flow. The experimental results and discussion in this paper can be generalized to any living cell or particle detection applications. © 2017 IEEE.

关键词： Object detection

来源：评论

学校读者我要写书评

暂无评论

Optical Power Control Filters: from Laser Dazzling to Damage Protection

Optical Power Control Filters: from Laser Dazzling to Damage...

引用

conference on Optical Components and Materials IX

作者： Donval, Ariela Golding, Karin Nevo, Doron Fisher, Tali Lipman, Ofir Oron, Moshe KiloLambda Technol Ltd IL-61580 Tel Aviv Israel

ISBN: (纸本)9780819489005

With the development of more powerful lasers for applications, optical limiters and blockers are required for providing human eye and optical sensors protection. In some scenarios, laser radiation may seriously interrupt the signal, from transient saturation and can lead to permanent damage. We present a variety of non-linear, solid-state dynamic filter solutions protecting from dazzling and damage in a passive way. Our filters either limit or block the transmission, only if the power exceeds a certain threshold as opposed to spectral filters that block a certain wavelength permanently. We propose a dynamic protection for cameras, sensors and the human eye from laser threats.

关键词： Wideband filter Dazzling protection nonlinear filter laser damage prevention sensor protection sensor hardening optical power limiting

来源：评论

学校读者我要写书评

暂无评论

Partial Discharge Multispectral detection in Air with a SiPM-based sensor 12

Partial Discharge Multispectral detection in Air with a SiPM...

引用

12th International conference on the Properties and applications of Dielectric Materials (ICPADM)

作者： Zhou, Jierui Ren, Ming Huang, Wenguang Zhang, Chongxing Dong, Ming Schichler, Uwe Xi An Jiao Tong Univ State Key Lab Elect Insulat Power Equipment Xian Shaanxi Peoples R China Graz Univ Technol Inst High Voltage Engn & Syst Performance Graz Steiermark Austria

ISBN: (纸本)9781538657881

Partial discharge (PD) is one of the reasons for the insulation deterioration in power equipment. As an intrinsic PD characterization method, optical detection is always just employed as a tool for laboratory study. With the development of solid-state photosensitive semiconductor device, it provides the possibility for implanting tiny photosensitive devices within the power equipment. In this paper, a SiPM-based PD light detector was designed for power supply and eliciting signal from SiPM. In order to compare the SiPM with other traditional PD detection methods, a synchronous PD measurement system was built to detect PD in optical and electrical method simultaneously. In addition, the PD light signals at different spectrum were detected by adding filters on the surface of SiPM. The results show that that SiPM has the same PD detection ability as that of high frequency current transformer (HFCT) and photomultiplier tube (PMT). There are some differences in the proportions of spectral components obtained by SiPM for different insulation defects, which provides an insight for insulation status evaluation.

关键词： SiPM Partial discharge Air Multispectral HFCT PMT Insulation status evaluation

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：