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Chowdhury I. Chakraborty S. Jandhyala V. Gope D. Rockway J. 《IEEE transactions on circuits and systems. I, Regular papers》2006,53(12):2664-2672
This paper focuses on a computational method for the simulation of the motion and manipulation of bio-particles using dielectrophoretic and micro-fluidic forces. The presented method uses surface integral equations for modeling both electromagnetic (EM) and fluidic domains. A coupled circuit-EM methodology is used to model electrical excitations. A steady Stokes flow is assumed for computing the fluidic traction forces. The resulting simulator accurately predicts the fields and forces on arbitrarily-shaped three dimensional particles representing bio-species. The presented methodology is amenable to acceleration with state of the art oct-tree-based fast matrix-vector schemes for rapid linear time iterative solution. This integrated computational approach leads to a pathway for rapid simulation of coupled circuit-EM-fluidic systems for Lab-on-chip (LoC) manipulation of biological species, which provides medical device designers the capability to augment control of bio-species, and explore new system designs 相似文献
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双旋光结构三值光学处理器(DRSTOP)具有数据位可重构和巨位数并行两大特性,可同时处理数千位的数据,在计算位数宽度很大的运算请求时,速度远远高于电子计算机.DRSTOP的超强运算能力需要依靠相应的控制信息来实现.本文阐述了DRSTOP的原理和结构,提出了基于行运算器思想的DRSTOP控制信息生成方法.基于该方法,DRSTOP可以自动化的完成用户提交的运算请求,进而能够作为一个强大的计算节点,融入并行平台,解决大规模数据计算问题.最后,本文针对所提出的控制信息生成方法进行了一系列实验验证,实验结果表明,该方法正确、完备、可行. 相似文献
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随着单芯片上集成处理器内核数量的增加,在支持多核处理器的应用程序方面,核间通信变得更加重要。通过分析多核运行任务特点,根据处理核上运行任务功能的不同,将处理核分成两类:控制核和计算核。根据对核的分类,提出了一种新的核间通信模型,该模型提供了三种不同的通信通道。运用这三条通道,把应用程序的I/O部分从计算核迁移到控制核来提高多核的利用率,实验结果表明该方式有效提高核间协作以及核间通信的效率,提升处理器的利用率。 相似文献
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我们所处的物理世界是模拟的。在现代信息与通信技术(ICT)、计算系统中,模拟电子的作用包括物理世界感应与交互、计算、控制、数据转换、通信、供电和测量等环节。以模拟集成电路为主体的模拟微电子器件是当今几乎所有以数字为中心的系统中的关键组件,对未来信息技术的发展至关重要。为了实现以5G、6G通信为代表的新一代ICT、工业4.0、物联网等信息社会的基础设施建设目标,其首要和必要条件是通过模拟硬件取得根本性突破,实现物理世界与机器交互的智能感知、认知和处理。为此要求模拟电子器件技术在无线信号链集成电路、计算范式与架构、高精度感知控制,以及模拟微电子技术的设计、工艺和封装测试技术、特定应用等方面开展研究,解决诸如计算范式与架构创新、压缩感知、新架构创新所需的工艺技术、毫米波和太赫兹等高频段集成电路开发所带来的各种挑战。文章从无线信号链集成电路、边缘机器学习中的模拟技术、高精度感知与控制、重要工艺创新等方面探讨了模拟微电子及应用技术前沿的最近研究进展,显示了未来模拟电子技术的关键发展趋势。 相似文献
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As more transistors are integrated onto bigger die, an on‐chip multiprocessor will become a promising alternative to the superscalar microprocessor that dominates today's microprocessor marketplace. This paper describes key parts of a new on‐chip multiprocessor, called Raptor, which is composed of four 2‐way superscalar processor cores and one graphic co‐processor. To obtain performance characteristics of Raptor, a program‐driven simulator and its programming environment were developed. The simulation results showed that Raptor can exploit thread level parallelism effectively and offer a promising architecture for future on‐chip multiprocessor designs. 相似文献
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In the 6th generation mobile communication system (6G) era, a large number of delay-sensitive and
computation-intensive applications impose great pressure on resource-constrained Internet of things (IoT) devices.
Aerial edge computing is envisioned as a promising and cost-effective solution, especially in hostile environments
without terrestrial infrastructures. Therefore, this paper focuses on integrating aerial edge computing into 6G for
providing ubiquitous computing services for IoT devices. This paper first presents the layered network architecture
of aerial edge computing for 6G. The benefits, potential applications, and design challenges are also discussed in
detail. Next, several key techniques like unmanned aerial vehicle (UAV) deployment, operation mode, offloading
mode, caching policy, and resource management are highlighted to present how to integrated aerial edge computing
into 6G. Then, the joint UAV deployment optimization and computation offloading method is designed to minimize
the computing delay for a typical aerial edge computing network. Numerical results reveal the significant delay
reduction of the proposed method compared with the other benchmark methods. Finally, several open issues for
aerial edge computing in 6G are elaborated to provide some guidance for future research. 相似文献
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《Electromagnetic Compatibility, IEEE Transactions on》2008,50(1):128-137
The increasing operating frequencies in modern designs call for broadband macromodeling techniques. The problem of computing high-accuracy simulation models for high-speed interconnects is of great importance in the modeling arena. Nowadays, many full-wave numerical techniques are available that provide high accuracy, often at a significant cost in terms of memory storage and computing time. Furthermore, designers are usually only interested in a few electrical quantities such as port voltages and currents. So, model order reduction techniques are commonly used to achieve accurate results in a reasonable time. This paper presents a new technique, based on the partial element equivalent circuit method, which allows to generate reduced-order models by adaptively selecting the complexity (order) of the macromodel and suitable frequency samples. Thus, the proposed algorithm allows to limit the computing time while preserving the accuracy. Validation examples are given. 相似文献
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Szekely V. Poppe A. Pahi A. Csendes A. Hajas G. Rencz M. 《Very Large Scale Integration (VLSI) Systems, IEEE Transactions on》1997,5(3):258-269
Due to severe thermal problems of today's VLSI integrated circuits the need for reliable and quick thermal, electro-thermal and logi-thermal simulation tools is increasing, In this paper, we discuss the latest advances in the SISSI package (simulator for integrated structures by simultaneous iteration) which is a tool developed originally for analog VLSI design. The improvements include electro-thermal ac and transient simulation and the consideration of the thermal voltage of Si-Al contacts. Furthermore, we introduce a new module of SISSI, LOGITHERM, which is aimed at the self-consistent logic and thermal simulation of large digital VLSI designs. The features of our simulator package are highlighted by simulation examples that are compared in most cases with measurement results 相似文献
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Papageorgiou EI Stylios CD Groumpos PP 《IEEE transactions on bio-medical engineering》2003,50(12):1326-1339
The radiation therapy decision-making is a complex process that has to take into consideration a variety of interrelated functions. Many fuzzy factors that must be considered in the calculation of the appropriate dose increase the complexity of the decision-making problem. A novel approach introduces fuzzy cognitive maps (FCMs) as the computational modeling method, which tackles the complexity and allows the analysis and simulation of the clinical radiation procedure. Specifically this approach is used to determine the success of radiation therapy process estimating the final dose delivered to the target volume, based on the soft computing technique of FCMs. Furthermore a two-level integrated hierarchical structure is proposed to supervise and evaluate the radiotherapy process prior to treatment execution. The supervisor determines the treatment variables of cancer therapy and the acceptance level of final radiation dose to the target volume. Two clinical case studies are used to test the proposed methodology and evaluate the simulation results. The usefulness of this two-level hierarchical structure discussed and future research directions are suggested for the clinical use of this methodology. 相似文献
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针对雷达通信一体化系统中雷达成像与通信共享信号的设计,分析了常见的一体化信号设计模式。首先,利用线性调频信号相位调制传递通信信息,设计了一种基于线性调频—二进制相移键控(LFM-BPSK)调制的雷达通信一体化信号,并给出了运动扩展目标的回波信号表达式;其次,通过计算单脉冲回波信号采样的逆离散傅里叶变换或离散傅里叶变换,提出了基于一体化信号合成高分辨距离像方法;然后,依据相位因子对傅里叶变换的影响,分析了多普勒效应对一体化信号合成距离像的影响;最后,对一体化信号的雷达成像性能进行了仿真计算。 相似文献
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信息论的经典结果表明,信源信道分离编码是渐进最优的。但现代通信系统对时延、带宽等愈发敏感,分离设计对解码具有无限计算能力这一假设难以成立。带宽有限时,相对于信源信道联合编码,分离编码已被证明是次优的。传统的联合信源信道编码需要复杂的编码方案,相较之下,数据驱动的深度学习技术则带来了新的设计思路。适时地对相关研究成果进行总结,有助于进一步明确深度学习方法解决信源信道联合编码问题的方式,为研究新的研究方向提供依据。首先介绍了基于深度学习的信源压缩方案和端对端收发信机模型,随后分析不同信源类型下的两种联合编码设计思路,最后探讨了基于深度学习的信源信道联合编码的潜在问题和未来的工作方向。 相似文献
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The state-of-the-art multi-core computer systems are based on Very Large Scale three Dimensional (3D) Integrated circuits (VLSI). In order to provide high-speed vertical data transmission in such 3D systems, efficient Through-Silicon Via (TSV) technology is critically important. In this paper, various Radio Frequency (RF) TSV designs and models are proposed. Specifically, the Cu-plug TSV with surrounding ground TSVs is used as the baseline structure. For further improvement, the dielectric coaxial and novel air-gap coaxial TSVs are introduced. Using the empirical parameters of these coaxial TSVs, the simulation results are obtained demonstrating that these coaxial RF-TSVs can provide two-order higher of cut-off frequencies than the Cu-plug TSVs. Based on these new RF-TSV technologies, we propose a novel 3D multi-core computer system as well as new architectures for manipulating the interfaces between RF and baseband circuit. Taking into consideration the scaling down of IC manufacture technologies, predictions for the performance of future generations of circuits are made. With simulation results indicating energy per bit and area per bit being reduced by 7% and 11% respectively, we can conclude that the proposed method is a worthwhile guideline for the design of future multi-core computer ICs. 相似文献
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《Microelectronics Reliability》2015,55(1):272-281
High computing capabilities and limited number of input/output pins of modern integrated circuits require an efficient and reliable interconnection architecture. The proposed communication scheme allows a large number of IP cores to send data over a single wire using logic code division multiple access (LCDMA) technique. Reliability is increased by using hardware redundancy, and three LCDMA-based fault tolerant designs are proposed: (a) duplication with logic comparison (DLC), (b) conventional triple modular redundancy (TMR), and (c) triple modular redundancy with sign voter (TSV). With aim to detect a received bit from chip sequence, LCDMA–DLC and LCDMA–TSV designs compare absolute values of the sums, while LCDMA–TMR compares only sign bits of the sums generated at the outputs of decoders. All proposed designs are implemented in FPGA and ASIC technologies. MATLAB simulation results show that increasing the length of spreading codes affects to an increase in reliability. A comparative analysis of the proposed fault tolerant designs in terms of hardware complexity, latency, power consumption and error detecting and correcting capability is conducted. It is shown that LCDMA–DLC design has lower hardware overhead and power consumption, with satisfactory better bit error rate (BER) performance, in comparison to LCDMA–TMR and LCDMA–TSV approach. 相似文献
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Kulishov M. Grubsky V. Schwartz J. Daxhelet X. Plant D.V. 《Quantum Electronics, IEEE Journal of》2004,40(12):1715-1724
Mode loss or gain can have a significant effect on the operation of waveguide transmission gratings as optical filters. Taking for example a long-period grating (LPG), we present a computer simulation that accounts for these effects. We show that cladding loss or gain result in qualitatively different LPG spectral behavior that can be used as a tuning mechanism in guiding structures where cladding mode properties can be controlled. One possible control mechanism is to have pump-driven gain in a doped cladding, which can perform gradual loss compensation and eventually gain excitement. Based on simulation results, we propose new approaches to tuneable amplifying filter designs in special fibers, as well as grating assisted co-directional couplers for integrated optics platforms. 相似文献
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坦克红外特征控制技术评述 总被引:2,自引:1,他引:1
坦克红外特征控制对于提高坦克的战场生存能力具有重要意义。控制的主要方法有遮障、表面处理、外形技术、主动冷却、总体设计等。坦克红外特征的控制必须与其他波段,特别是射频波段的特性控制兼容。遮障和低发射率涂料是现役坦克红外特征控制的主要措施。而对未来的主战坦克,设计应是减少其系统特性的重要途径。 相似文献