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1.
杜飞龙 《微电脑世界》2004,(1):33-33,36
回顾IT技术在过去的发展,一般越是高端、大型的计算或越是关键的应用,越是将安全性和稳定性的诉求放到显要的位置;而个人(企业客户端或家用PC)计算则往往更注重低成本、易用性,因此在PC系统的安全性和稳定性方面远不及企业的大型计算系统。那么,企业或特殊行业领域的高端计算系统中与安全性、稳定性相关的成功技术经验,能否被引入到较低端的个人计算(PC)系统中呢? 答案是肯定的。最近一段时间以来,IT技术的发展已自然而然地汇聚成这样一股潮流,即越来越多的成功技术正逐渐从高端下移向低端。而刀片技术也不甘寂寞,正试图冲出刚成气候的刀片服务器市场,将其安全、稳定、易管理、低成本等优势移植到个人的客户端设备当中——这就是初露端倪的刀片PC。  相似文献   

2.
高端计算作为带动计算机技术发展的火车头将在下个世纪信息社会的发展进程中发挥重要作用。本文从超级计算机、高性能服务器和高端计算服务等几个方面分析了高端计算技术的时代特点、面临的挑战和发展趋势。  相似文献   

3.
随着计算技术、网络技术、芯片技术等技术的快速发展,分布式计算系统架构将成为未来机载、车载、家庭、交通等诸多嵌入式领域的主要系统架构.分析了分布式系统的概念和内涵,基于机载、车载领域计算系统的发展,对分布式嵌入式计算系统涉及的关键技术进行研究和分析,探讨在分布式嵌入式计算系统设计时应重点关注的技术.  相似文献   

4.
随着网格技术的发展和应用的扩展,网格己经从单一的面向高性能计算的计算网格转向为面向服务的商业网格.通过分析对等计算融入网格计算技术.将对等思想和对等搜索技术应用于网格资源管理中,提出了一种新的对等搜索框架.最后设计并实现了一个基于P2P技术的网格系统模型.并详细介绍了系统架构、系统主要组成部分、以及网格系统模型的具体功能实现.  相似文献   

5.
解读并行集群渲染系统   总被引:1,自引:0,他引:1  
一、从集群运算系统到集群渲染系统 当今PC工业快速发展,高性能PC系统与高端图形系统的差距日趋减小,过去在高端图形工作站上才可以完成的工作,现在大部分都可以用PC来完成.这种情况导致更大规模的基于PC工作站的动画制作系统产生. 从计算能力和可靠性来说,PC已经赶上甚至超过了图形工作站.依据著名的摩尔定律,PC的性能每一年半就会翻番,发展速度远远超过了工作站,就性能价格比来说,PC也占据绝对优势.  相似文献   

6.
汽车嵌入式SoC系统的应用与发展   总被引:5,自引:1,他引:5  
介绍了作为泛计算领域重要组成部分的汽车嵌入式系统由低端到高端的发展历程和各个阶段的主要特点,详细论述了嵌入式SoC系统应用于汽车电子方面的新理论、新方法和关键技术,并对汽车嵌入式SoC系统的发展趋势进行了展望。  相似文献   

7.
近日,主题为驱动商业计算,缔造精彩未来的服务器高端技术推广会在深圳、成都、北京等全国十大城市相继拉开帷幕。联想携手全球合作伙伴英特尔,向业界及行业用户展示高端商用计算技术研究和开发领域的最新成果,并同与会者共同探讨商用计算技术的发展动向与趋势。此外,联想奥运技术专家首次亮相本次  相似文献   

8.
从高性能计算走向高效能计算   总被引:2,自引:0,他引:2  
高端计算(High End Computing)处于21世纪信息技术的前沿,是科技创新的重要工具,是人类社会探索未知世界的重要手段,是衡量一个国家经济技术综合实力的重要标志。高端计算机一直以高于微处理器摩尔定律的速度在发展,即其性能每四年提高10倍。纵观当前国际高端计算的发展形势,一方面,高端计算正从科学计算向经济和商业各个领域扩展,更看重服务能力;另一方面,随着新的科学发现、国防建设、国家安全等应急性(Critical)任务的需求牵引,高端计算研究、开发以及对高端计算机的采购出现了新的热潮。  相似文献   

9.
随着越来越多的机构采用集群计算技术来实现高性能计算(HPC)--地球、海洋和大气科学、地震数据分析等科学研究和药物研究、汽车设计模型、商业业务冒险分析等商业应用,集群计算技术已经进化为开发高性能计算系统的主要的方法.所有的这些应用的计算都是公认的复杂.能够有效地管理与这些应用密切相关的数据集驱动了现在的集群计算技术的发展.采用智能存储设备(OSD)大大简化了元数据服务器的工作量,并且使得系统的管理和效率都得到了很大的提高.集中描述一个新的存储体系结构--基于智能OSD的共享存储集群计算系统.  相似文献   

10.
随着信息化进程的不断深入及PC应用的普及,人们对高端商用PC提出厂新的要求。可信赖技术、无线技术、智能化及协同计算等技术正逐渐融入到高端商用台式电脑中。其中可信赖技术涵盖了高端商用台式电脑发展的安全、可管理、易用三大要素,已成为一个重要趋势。  相似文献   

11.
High Performance Cluster Computing Systems (HPCSs) represent the best performance because their configuration is customized regarding the features of the problem to be solved at design time. Therefore, if the problem has static nature and features, the best customized configuration can be done. New generations of scientific and industrial problems usually have dynamic nature and behavior. A drawback of this dynamicity is that the customized HPCSs face challenges at runtime, and consequently show the worse performance. The reason for this might be due to the fact that dynamic problems are not adapted to configuration of the HPCS. Hence, requests of the dynamic problem are not in the direction of the HPCS configuration. The main proposed solutions for this challenge are dynamic load balancing or using reconfigurable platforms. In this paper, a vector algebra-based model for HPCS reconfiguration at runtime is presented and named AMRC. This model determines the element causing the dynamic behavior and analyzes the reason regarding both software and hardware at runtime. Some results of the presented model show that by defining a general state vector whose direction is toward reaching high performance computing and whose weight is based on the initial features and explicit requirements of the problem, as well as by defining a vector for each process in the problem at runtime, we can trace changes in the directions and uncover the reason for them.  相似文献   

12.
Round-robin differential-phase-shift (RRDPS) quantum key distribution (QKD) scheme provides an effective way to overcome the signal disturbance from the transmission process. However, most RRDPS-QKD schemes use weak coherent pulses (WCPs) as the replacement of the perfect single-photon source. Considering the heralded pair-coherent source (HPCS) can efficiently remove the shortcomings of WCPs, we propose a RRDPS-QKD scheme with HPCS in this paper. Both infinite-intensity decoy-state method and practical three-intensity decoy-state method are adopted to discuss the tight bound of the key rate of the proposed scheme. The results show that HPCS is a better candidate for the replacement of the perfect single-photon source, and both the key rate and the transmission distance are greatly increased in comparison with those results with WCPs when the length of the pulse trains is small. Simultaneously, the performance of the proposed scheme using three-intensity decoy states is close to that result using infinite-intensity decoy states when the length of pulse trains is small.  相似文献   

13.
本文刻画了标记配对相干态光源(HPCS光源)光子数分布的两条性质,基于三强度诱骗态编码方案,证明了HPCS光源满足强度涨落下量子密钥分配最终密钥生成率表达式的条件.数值模拟表明,HPCS光源的三强度诱骗态编码方案与理想方案(无穷诱骗态)的接近程度较高,该光源对强度涨落的稳定性要好于弱相干态光源,但明显比标记单光子源要弱...  相似文献   

14.
分析了以超级计算中心联想深腾6800为主的HPCS监控需求,比较了大量的监控实现技术,给出监控系统评估特征和指标,提出了一种集系统、性能、应用程序、进程监控于一体的改进策略,讨论了利用信息流水、过滤、双重传输模式减少监控数据传输量,减轻监控资源消耗,提高综合监控的性能和效率.  相似文献   

15.
The original measurement device-independent quantum key distribution is reviewed, and a modified protocol using heralded pair coherent state (HPCS) is proposed to overcome the quantum bit error rate associated with the dark count rate of the detectors in long-distance quantum key distribution. Our simulation indicates that the secure transmission distance can be improved evidently with HPCS owing to the lower probability of vacuum events when compared with weak coherent source scenario, while the secure key rate can be increased with HPCS due to the higher probability of single-photon events when compared with heralded single-photon source scenario. Furthermore, we apply the finite key analysis to the decoy state MDI-QKD with HPCS and obtain a practical key rate.  相似文献   

16.
应用驱动的高效能计算机系统的研究与发展   总被引:1,自引:0,他引:1  
在分析并行应用为高效能计算机系统提出的挑战的基础上,针对Cray和IBM的相关计划,探讨了应用对高效能计算机研发计划、系统决策、系统架构以及系统软件的影响,总结了有代表性的千万亿次计算机计划及其系统,并从应用范围的角度对高效能计算机系统进行了分类;进一步综述了高效能计算机系统在体系结构、编程环境、管理以及鲁棒性等方面取得的进展.最后从应用的角度展望了高效能计算机系统的发展.  相似文献   

17.
基于异步光分组交换及光组播技术,提出一种新型高性能计算机系统(HPCS)。采用分布式控制结构进行系统的分级管理,有利于处理大批量突发业务及系统的全光多级扩展。基于循环光纤延时线(Rec-FDL),提出一种紧凑、大容量的异步全光分组冲突解决机制,并与传统的分组重传冲突解决算法(PRA)进行了性能比较;建立了系统的稳定性、丢包率及时延分析模型。仿真结果表明,对于一个能够实现40320个CPU互连的两级系统,Rec-FDL机制的平均分组等待时延TRec-FDL约为0.004ns,而PRA算法的平均分组等待时延Trerans随分组传输距离D增加而增加,在D为10m和20m时,Trerans分别等于0.006ns和0.01ns。因此,对于分布式HPCS而言,Rec-FDL机制具有更优秀的时延特性。  相似文献   

18.
高性能计算是气象业务及科研应用的重要的基础平台,中国气象局 (China Meteorological Administration,CMA) 近年来相继引进多套高性能计算机系统,随着气象业务和应用能力的不断提高,系统利用率稳步上升,用户数也逐月增加,截止到 2012 年底,用户总数超过 600 人。用户数的增加、用户的变动导致系统中的用户信息不完整、错误以及无法更新,以至出现问题时无法及时联系到相关用户,对系统的维护管理及用户支持造成了一定的困难。本文介绍了对 CMA 多套高性能计算机系统上的用户信息进行统一管理的设计思路和具体实现,相关工作的完成有助于减少管理和维护成本,更好的为用户提供优质的支持和服务。  相似文献   

19.
We propose an asynchronous optical packet switching (AOPS) based multistage interconnection network employing the distributed control and banyan-like routing scheme, which can construct the high performance computing system (HPCS). A flexible, low latency, and high capacity recycling-fiber-delay-line (Rec-FDL) based collision resolution mechanism is proposed with higher switching efficiency for burst services than that by the conventional packet retransmission algorithm (C-PRA). The system performances, including stability, blocking rate (BR), and longest packets waiting latency (LPWL) are analyzed. The simulation shows that the system stability condition for the Rec-FDL mechanism is the new packet arriving rate λ less than 30×106 packets/s. In addition, the BR and Rec-FDL induced LPWL are 0.1235–0.1413 and 6.305 ns–7.651 ns, respectively, with increasing the number of CPUs connected to the system from 4 to 16,384, while the increment for LPWL induced by the conventional algorithm is 3.9 ns at the same conditions as above. Therefore, the mechanism presented here is more beneficial for the system scalability and has higher latency reducing abilities than the C-PRA.  相似文献   

20.
As office workers’ use of social networking sites (SNSs) has increased, so has research interest in the effect of SNS use on job performance. The present study employs data collected from South Korean office workers to examine how the use of the SNS Facebook affects job performance and to investigate the moderating effects of task characteristics (task equivocality and task interdependence). The results show that Facebook use for work has a positive effect on job performance, although the time spent on Facebook use does not have a significant effect on job performance. Moreover, task interdependence is associated with a decrease in the effect of Facebook use for work on job performance. In other words, task interdependence has a negative moderating effect on the impact of Facebook use for work on job performance. The reason is that Facebook is particularly advantageous for enhancing performance in tasks where the level of interdependence is low because it is a medium with relatively low synchrony and is unsuitable for one-to-one relationship building. This study has implications for companies that are concerned about formulating policies related to employees’ use of SNSs.  相似文献   

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