检索结果-南通市图书馆

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Forward

Journal of Computer Science & Technology 2005年第5期20卷 i0001-i0002页

作者： pen-chung yew Jing-Ling Xue University of Minnesota at Twin Cities U.S.A. University of New South Wales Australia

ACSAC （Asia-Pacific Computer Systems Architecture） is a premium forum for researchers, educators and practitioners to come to the Asia-Pacific region to exchange the ideas about the latest developments in Computer Systems Architecture. ACSAC＇04 was held in Beijing during September 7-9 2004. Out of 152 submissions, a total of 45 papers were accepted and presented at this annual conference. We are pleased to have co-chaired this conference, which received the largest number of submissions in the conference history.

关键词：

Mercury: Combining Performance with Dependability Using Self-Virtualization

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Computer Science & Technology 2012年第1期27卷 92-104页

作者： Hai-Bo Chen Feng-Zhe Zhang Rong Chen Bin-Yu Zang pen-chung yew School of Software Shanghai Jiaotong UniversityShanghai 200240China Parallel Processing Institute Fudan UniversityShanghai 201203China Institute of Information Science Academia SinicaTaipeiChina

Virtualization has recently gained popularity largely due to its promise in increasing utilization, improving availability and enhancing security. Very often, the role of computer systems needs to change as the business environment changes. Initially, the system may only need to host one operating system and seek full execution speed. Later, it may be required to add other functionalities such as allowing easy software/hardware maintenance, surviving system failures and hosting multiple operating systems. Virtualization allows these functionalities to be supported easily and effectively. However, virtualization techniques generally incur non-negligible performance penalty. Fortunately, many virtualization- enabled features such as online software/hardware maintenance and fault tolerance do not require virtualization standby all the time. Based on this observation, this paper proposes a technique, called Self-virtualization, which provides the operating system with the capability to turn on and off virtualization on demand, without disturbing running applications. This technique enables computer systems to reap most benefits from virtualization without sacrificing performance. This paper presents the design and implementation of Mercury, a working prototype based on Linux and Xen virtual machine monitor. The performance measurement shows that Mercury incurs very little overhead： about 0.2 ms on 3 GHz Xeon CPU to complete a mode switch, and negligible performance degradation compared to Linux.

关键词： dependability performance self-virtualization dynamic virtualization

ASLOP:A field-access affinity-based structure data layout optimizer

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2011年第9期54卷 1769-1783页

作者： yew pen-chung Department of Computer Science and Engineering University of Minnesota at Twin-Cities

By rearranging the data,data layout optimizations improve the utilization of a cache line between two of its successive refills,thus reducing the total number of cache line refills and improving the performance of a *** this paper,we show that to enable structure data layout optimizations to be effective,two parameters,namely intra-instance affinity and inter-instance affinity,need to be considered at the same time in order to model the cache line utilization more *** also propose a lightweight approach to measure intra-instance affinity and inter-instance affinity to avoid complex memory trace analyses.A prototype,called ASLOP,has been implemented in the Open64 compiler and evaluated using benchmarks from SPEC CPU 2000,SPEC CPU 2006 and Olden benchmark suites that have extensive structure *** approach can achieve up to 48.1% performance improvement over the original programs,and 11.9% over the optimized programs using maximal reshaping,an existing approach that is known to produce close to the best results,on the two platforms we tested.

关键词： compiler optimization data-layout optimization memory hierarchy inter-instance affinity intra-instance affinity

Analysis of streamwise conduction in forced convection of microchannels using fin approach

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2011年第9期12卷 655-664页

作者： Suhandran MUNIANDY yew Mun HUNG Faculty of Engineering and Technology Multimedia University Infineon Technologies Sdn Bhd Batu Berendam School of Engineering Monash University

The effects induced by streamwise conduction on the thermal characteristics of forced convection for single-phase liquid flow in rectangular microchannel heat sinks under imposed constant wall temperature have been studied. By employing the fin approach in the first law of analysis, models with and without streamwise conduction term in the energy equation were developed for hydrodynamically and thermally fully-developed flow under local thermal non-equilibrium for the solid and fluid phases. These two models were solved to obtain closed form analytical solutions for the fluid and solid temperature distributions and the analysis emphasized details of the variations induced by the streamwise conduction on the fluid temperature distributions. The effects of the Peclet number, aspect ratio, and thermal conductivity ratio on the thermal characteristics of forced convection in microchannel heat sinks were analyzed and discussed. This study reveals the conditions under which the effect of streamwise conduction is significant and should not be neglected in the forced convective heat transfer analysis of microchannel heat sinks.

关键词： Streamwise conduction Fin approach Microchannel heat sink

Context and Machine Learning Based Trust Management Framework for Internet of Vehicles

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2021年第9期68卷 4125-4142页

作者： Abdul Rehman Mohd Fadzil Hassan yew Kwang Hooi Muhammad Aasim Qureshi Tran Duc chung Rehan Akbar Sohail Safdar Computer and Information Science Department Centre for Research and Data Science(CeRDaS)Universiti Teknologi PETRONAS32610Seri IskandarPerak Darul RidzuanMalaysia Department of Computer Science Bahria UniversityPakistan Computing Fundamental Department FPT UniversityHoa Lac Hi-Tech ParkHanoiVietnam Department of Information Systems Uiversiti Tunku Abdul RahmanMalaysia Information Technology Department College of IT AHLAI UniversityBahrain

Trust is one of the core components of any ad hoc network security *** management(TM)has always been a challenging issue in a vehicular *** such developing network is the Internet of vehicles(IoV),which is expected to be an essential part of smart *** originated from the merger of Vehicular ad hoc networks(VANET)and the Internet of things(IoT).Security is one of the main barriers in the on-road IoV *** security standards are insufficient to meet the extremely dynamic and rapidly changing IoV *** plays a vital role in ensuring security,especially during vehicle to vehicle *** networks,having a unique nature among other wireless ad hoc networks,require dedicated efforts to develop trust *** TM schemes are inflexible and *** scenarios and limited parameters are the basis for existing TM models that are not suitable for vehicle *** vehicular network requires agile and adaptive solutions to ensure security,especially when it comes to critical *** vehicle network’s wireless nature increases its attack surface and exposes the network to numerous security ***,internet involvement makes it more vulnerable to *** proposed TM framework is based on context-based cognition and machine learning to be best suited to IoV *** learning is the best solution to utilize the big data produced by vehicle *** handle the uncertainty Bayesian machine learning statistical model is *** proposed framework can adapt scenarios dynamically and infer using the maximum possible parameter *** results indicated better performance than existing TM ***,for future work,a high-level machine learning model is proposed.

关键词： Internet of vehicles(IoV) trust management(TM) vehicular ad hoc network(VANET) machine learning context awareness bayesian learning

Heat Transfer Performance of Microgroove Back Plate Heat Pipes with Working Fluid and Heating Power

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Thermal Science 2020年第4期29卷 982-991页

作者： WU Yanpeng JIA Jie TIAN Dongmin CHUAH yew Khoy Department of Building Environment and Energy Engineering University of Science and Technology BeijingBeijing 100083China Department of Energy and Refrigerating Air Conditioning Engineering Taipei University of TechnologyTaipei 10608China

Micro heat pipes(MHP) cooling is one of the most efficient solutions to radiate heat for high heat flux electronic components in data centers. It is necessary to improve heat transfer performance of microgroove back plate heat pipes. This paper discusses about influence on thermal resistance through experiments and numerical simulation with different working fluids, filling ratio and heat power. Thermal resistance of the CO2 filled heat pipe is 14.8% lower than the acetone filled heat pipe. In the meantime, at the best filling ratio of 40%, the CO2 filled heat pipe has the optimal heat transfer behavior with the smallest thermal resistance of 0.123 K/W. The thermal resistance continues to decline but the magnitude of decreases is going to be minor. In addition, this paper illustrates methods about how to enhance heat pipe performance from working fluids, filling ratio and heat power, which provides a theoretical basis for practical applications.

关键词： microgroove back plate heat pipes working fluids filling ratio heat power

Spinal intradural electrodes: opportunities, challenges and translation to the clinic

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2024年第3期19卷 503-504页

作者： Bruce Harland Chien yew Kow Darren Svirskis School of Pharmacy University of AucklandAucklandNew Zealand Department of Neurosurgery Auckland City HospitalAucklandNew Zealand

Damage to the spinal cord disrupts the electrically active nerve cells which normally transmit afferent and efferent signals,resulting in loss of motor,sensory,and autonomic *** treatments for spinal cord injury utilizing implanted spinal electrodes can be broadly classified into three different *** first of these approaches is“spinal stimulation”where electrodes,usually positioned above the level of injury,provide electrical stimulation to target and disrupt pain signals before they reach the *** second approach uses“activity-dependent neuro-technologies”,in which electrodes positioned below the level of injury initiate a complex spatiotemporal pattern of stimulation at the lumbar spinal cord to generate a walking gait in the limbs(Minev et al.,2015;Wagner et al.,2018).

关键词： stimulation electrodes utilizing

Endovascular treatment of diabetic foot ischemic ulcer–Technical review

在线全文

学校读者我要写书评

暂无评论

Journal of Interventional Medicine 2020年第1期3卷 17-26页

作者： yew Toh Wong Flinders Medical Centre Bedford ParkSouth AustraliaAustralia

This article is a technical review of the common techniques used in the treatment of lower-limb occlusive arterial disease associated with *** techniques described here reflect the author’s own practice and are methods that the author finds helpful in avoiding complications and in making the technical aspects of the procedures easier.

关键词： Diabetes Foot ulcer Ischemia Endovascular treatment Angioplasty Stenting Retrograde access Subintimal Intraluminal Pedal arch Perfusion

Characterization and thrust measurements from electrolytic decomposition of ammonium dinitramide(ADN)based liquid monopropellant FLP-103 in MEMS thrusters

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2018年第9期26卷 1992-2002页

作者： Asad Rahman Jitkai Chin Feroz Kabir yew Mun Hung Department of Chemical and Environmental Engineering University of Nottingham Malaysia Campus Jalan Broga43500 SemenyihSelangorMalaysia Department of Engineering and Mathematics Sheffield Hallam UniversitySheffield S1 1WBUnited Kingdom Department of Mechanical Engineering Monash University Sunway Campus Jalan Lagoon Selatan47500 5ubang JayoSelangorMalaysia

Although ammonium dinitramide(ADN)has been targeted as a potential green monopropellant in future space vehicles,its application potential in Micro-electrical–Mechanical System(MEMS)thrusters or microthrusters has been seldom reported in open *** this paper,electrolytic decomposition of Ammonium Dinitramide(ADN)-based liquid monopropellant FLP-103 was carried out in an open chamber and MEMS thrusters were fabricated from poly-dimethylsiloxane(PDMS)to characterize the power *** thrust measurement methods were employed to investigate the electrolytic decomposition of FLP-103 in MEMS *** results show that the monopropellant can be successfully ignited at room temperature through 80 V,0.1 A(8 W)using copper wire as *** the current thruster design,low thrust was obtained at FLP-103 flowrate of 40μl·min^(-1)but it generated the highest specific impulse,Isp,among all the flowrates *** experiments successfully demonstrated the potential application of electrolytic decomposition of FLP-103 in MEMS thrusters.

关键词： Ammonium Dinitramide (ADN) FLP-103 Electrolytic decomposition MEMS thruster