With the continuous development of the city,the application of floating big data is becoming more widespread.It shows very effective results to combine big data with modern advanced intelligent transportation technology, strengthen the construction of city traffic management system, and improve the transportation system. This paper introduces the city traffic management system network platform and functions and elaborates the method to achieve the shortest path on the platform.

It is effective to increase the throughput and reduce the delay of ad hoc by concurrently transmitting different packets through distinct channels.Compared with other multichannel medium access control(MAC) protocols,Multiple Rendezvous is more flexible since there are no requirements of external hardware and time synchronization.Considering that as the overloads of handling deadlock,waiting and matching increase,the performance of multichannel ad hoc network is reduced by broadcasting,Matching Algorithm for Multiple Rendezvous(MAMR) is proposed.According to broadcast requirements,it is converged to a stable state without collision or deadlock.It has the characteristics that only broadcast nodes' degrees are greater than 1,and there exists no edge between broadcast nodes.It is proved that the algorithm stabilizes at most 4m moves on a network with m edges.Under the condition that the set of broadcast nodes is presented before the initial state,a maximal match is reached;under the condition of no broadcast node,the algorithm is equivalent to Hsu and Huang's self-stabilizing algorithm for maximal matching.Simulation results show that the performance of MAXimal Matching multichannel(MAXM) and Busy Tone Multichannel(BTMC) protocols are increased by 10% by using MAMR when 5% of transmission packets are required for broadcasting.

Topology control technology has a significant impact on network performance of wireless sensor technology. In this paper, an energy-balanced topology control algorithm (EBTCA) is proposed based on the local minimum spanning tree algorithm (LMST). This algorithm considers energy consumption of communication between nodes as well as node residual energy, which minimizes the local energy consumption and maintains the energy balance of the nodes. It also solves the problem of rapid death of bottleneck node due to large load and extends the working hours of the node, thereby extends the network lifetime. The simulation experiment results on the OPNET simulation platform show that EBTCA algorithm ensures a low-end latency, higher throughput and delivery rate, extends the network lifetime so that reliable operation of the network is ensured.

<计算机设计与实践>课程作为<计算机组成原理>的后续课程和重要实践环节,是探索综合性、创新性实践教学模式的具体实现形式.本文探讨了这门课程的建设目标:培养学生的系统性的认识能力、理论联系实际的能力、完成工程项目的能力,同时总结了教学实践中的一些心得体会.

For computer systems required high levels of reliability, imperfect fault coverage will have a major impact on the overall system reliability when compared with the ideal system with perfect coverage, and the correct estimation of coverage is also important. This paper presents a two-stage sampling estimation to obtain coverage parameter based on fault injection technique. Then we demonstrate a combinatorial model to compute the system reliability based on different fault coverage models. Through an example of tri-module system, we explains the application of two-stage sampling and the impact of imperfect fault coverage on system reliability. The results show that different fault coverage models have different impacts on reliability.

This paper describes the use of SOPC technology to design a wearable computer system with three processors sharing resources,the main processor is mainly responsible for the running of the operating system and application software,the network processor is mainly responsible for handling messages,the DSP processor is mainly responsible for the processing of the video and image data.This paper describes in detail the implementation mechanism of the multiprocessor system based on Nios Ⅱ and FPGA,discusses the use of hardware mutex to realize multi-processor resource sharing and gives the specific steps for the design of the hardware,the design of the software,testing methods and key technology.Introduces the structural features of the network processor Nios Ⅱ and customized instructions and design methods for forwarding software of the network processor based on the Nios Ⅱ soft-core processor and design methods for the DSP processor used for the processing of the video and image data.After verification,the three-processor system very well adapted to the wearable computer's micro and small and low-power design requirements.

There is urgent need on fault injection techniques for performance analysis evaluation of high performance Fault-tolerant computer. This article focuses on fault distribution and fault injection techniques. Through analyzing data from the computer failure data repository which were published by CMU, we the fault distribution of high performance fault-tolerant computers. And this paper presents a comprehensive evaluation of an open framework high performance fault-tolerant computer system with the analysis result, and mainly focuses on the evaluation analysis of availability for high performance fault-tolerant with specific research strategy of fault injection techniques.

本文主要探讨了计算机专业主干课程"计算机组成原理"的课程实现问题,分析比较了University of California at Berkeley、Carnegie Mellon University、清华大学和我校等几所大学"计算机组成原理"课程的教学情况,探讨了作为"计算机组成原理"的重要实践环节的"计算机设计与实践"课程的综合性、创新性实践教学模式,有助于提高"计算机组成原理"课程的教学质量。

Intelligent agent model has been a hotspot of the agent research area. A knowledge-based intelligent agent logical model is presented. In the model, knowledge is the kernel and inference is the main planning method. Based on the logical model, the paper presents the internal knowledge definition model of the intelligent agent, designs the agent's physical structure based on blackboard model and gives the key algorithm. As a general intelligent agent model, it can support the agent's intelligent behavior effectively and apply to any appropriate situation conveniently. Through the application in the soybean production management system which is a part of the farm CIMS, it is proved that the model has adaptability, planning ability, inference ability and learning ability besides the basic agent's feature.

"计算机设计与实践"课程作为"计算机组成原理"的后续课程和重要实践环节,是探索综合性、创新性实践教学模式的具体实现形式。开展实践环节的教学研究,开发真正以学生为中心的教学模式,开展设计性与创新性实践教学内容的研究,完善实践教学环境,可以锻炼学生的设计能力和动手能力,培养学生的综合能力和创新能力,提高学生的综合素质。

本文首先介绍了国内外大学相关课程的基本情况,然后对比分析了哈工大计算机学院的"计算机设计与实践"课程与国外相关课程的差别与差距。

结合哈尔滨工业大学计算机学院开设的"计算机设计与实践"课程的教学实践,探讨了设计性教学中如何培养学生的综合能力和创新能力。实践教学体系是与理论教学平行而又相互协调、相辅相成的。应尽可能为学生提供综合性、设计性、创造性比较强的实践环境,让每个学生经过这种实践环节的培养和训练,不仅培养学生扎实的基本技能与实践能力,而且能够提高学生的综合素质和创新能力。

介绍了一种小卫星的星务计算机系统硬件设计方案,并结合应用的要求给出了容错体系结构的设计方案,从冗余结构到容错管理模式,从故障检测和诊断到系统重构,多视角多层面地展现了小卫星容错体系的设计思路,最后还利用模型计算了系统的可靠度指标.

Small satellites need computer systems with fault tolerance for the reason of requiring high reliability. This paper presented a reliability design for housekeeping computer systems used in small satellites. Based on the dual redundancy, the reliability design uses warm backup fault-tolerant mechanism which has the advantage of reliability and real-time control and is supported by some key technologies mentioned in the paper. An application of the reliability design to a housekeeping computer system used in Solid Measurement Micro Satellite of HIT, named TS-1 satellite, proved that the design can improve the reliability of the small satellite.