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ON/OFF aggregation model is one of the efficient and accurate models for self-similar network traffic generation. In this paper we propose and compare three algorithms of implementing ON/OFF aggregation model, based on Cavium OCTEON CN3860 network processor, aimed to achieve high-bandwidth and real-time network traffic generation. The model is implemented in a multi-thread approach, in a token-bucket...
Service oriented organizations rely on resilient computing systems to assist them not only in automating their business but also extending their operation hours to 24 by 7. Two major categories of their computing systems are software and hardware. Many researchers have worked on the software development to improve the performance of business processes on the application level. However, without proper...
The solution to debug a problem in a deeply embedded system is to integrate the debug and communication module inside the chip. In this paper, we propose an on-chip in-circuit emulation (ICE) architecture for debugging an asynchronous Java accelerator core which can be integrated with any existing processor and operating system. The operation of this ICE module and the debug strategy of the Java accelerator...
Pressure test is an essential work of Web application performance test and one of the important means to ensure software quality and performance. Pressure test can find a lot of unexposed problems under normal circumstances, which means that it can find more system bugs than others. Pressure test tests the load conditions of system, devises test scheme for the system performance indicators and verifies...
With the enlargement of the application fields of embedded systems, the quality and development cycle of embedded software play crucial roles on the cost, the quality and the time coming up in the market of the product, so increasingly importance has been attached to the test of embedded software. After characteristics of embedded software test, test technology and the test tools are introduced, the...
The down-filling machine is the automatic, intelligent, mechanical and electric device with low-cost, great efficiency that can reduce labor intensity and improve labor conditions. It can fill down to duvet or down jacket from the container according to weight data exactly. This paper elaborated on several aspects: working principle of automatic down -filling machine, realization of control system,...
Network on chip (NoC) implements routers and links onto a single chip. NoC is scalable compared to bus for many-core system. When communication moves from bus to NoC, the single centric memory becomes congested node of network and bottleneck of performance. In this paper, we apply distributed shared memory architecture to a NoC-based multi-processor system. On this hardware platform, we ran a multi-thread...
The rise of cloud computing leads to a possibility that nearly all applications can be ported to Web and only browser is needed in client computer. This kind of computer is called network computer or thin client. PC and laptops are fat clients and too luxurious to run browsers only. Netbooks and nettops are cheap and designed to match cloud computing. But they are still using the same operating systems...
Single-chip is a highly practical and professional course. The harmony between practical teaching and theory teaching is illustrated by the construction and evaluation of MCU curriculum design in this paper. Practical teaching would help students deeply understand the relationship of different courses in the major curriculum and deepen the knowledge structure. It also makes students in higher vocational...
The Hardware/Software co-design method for fast image processing tasks is presented in this paper. The platform is a FPGA board, which is embedded with a soft processor as the main processor in the system, and a co-processor is designed using FSL (Fast Simple Link) to connect the main processor. The software application on the main processor can deal with general function, but can not afford the time-critical...
With the development of mobile communication technologies and the popularity of relating devices, mobile learning (M-learning) system has been used more and more widely. But most of existing M-learning systems have built on mobile platforms whose interfaces don't open to general education institutions. This limits M-learning application. In view of this, a novel mobile auxiliary learning system, called...
Most of BU-61580 storage mode that used formerly transmitted and received data with single message mode. In this paper, we use the circular buffer mode to implement data receiving based on the single message mode, thus greatly improve the efficiency of data transmission.
Network traffic generation has always been a hot spot in network measurement and simulation research. However, traditional methods of generating network traffic are either insufficient in fulfilling bandwidth requirement or matching the characteristics of a real network. In this paper we propose a platform of generating high bandwidth real-time network traffic with self-similarity characteristic....
The phenomenon of Resource Island has a long history. Many researchers and experts from business have introduced several solutions from technical view, but the actual results are not satisfactory. Through analyzing the life cycle model and the flow model of digital learning objects, in the context of computer hardware technology and Internet developing further, we proposed a new method of solving...
Design and implementation of embedded parallel DSP software poses various challenges due to the complexities posed by the application as well as heterogeneous nature of the platform. One of most issues with regards to such system is communication between processor. In this paper, we present a reusable message passing software framework to make application level code more portable. A dataflow based...
In this paper temporal semantics based on the Duration Calculus are put into the Architecture Analysis and Design Language, furthermore the timing component is proposed to model the timing behavior of systems including software and hardware separately. Some important time-dependent properties of performance-critical systems are classified and the system specification in the modeling language into...
In this paper an efficient solution of large scale, interactive terrain visualization is proposed based on graphic hardware. The method of multi-thread is adopted to resolve the bottle-neck problem of data fetching from the external memory, and the methods of level of details (LODs) based on view-dependent and mesh rendering in graphics programmable units (GPU) are used to ensure visual quality and...
The LHCD phase control system is designed to study plasma physics on the EAST tokamak. The I/Q method with AD8302 is applied to the system for measuring the signals' phase difference and FPGA chips are used to compute and communicate. The application software including the driver of PCI card is designed under the QNX RTOS and the MDSplus database is used to store and manage the phase data. Besides,...
The gravity center of human body is one of the basic segment inertia parameters reflecting the structure of configuration and character of mass distribution of human body, which can offer references in the medical rehabilitation and the sports activity. Therefore, it is important of the study on the gravity center. In order to get the gravity center position accurately, a testing system is developed...
This article studies the SCA specification especially the Software Architecture, then puts forward the structure's chart of DSSS (direct sequence spread spectrum) communication system. Based on the ideas of SCA waveform modeling, this article emphasizes on designing the SCA-based DSSS waveform application, and gives the UML class diagrams of software waveform. At last, it presents the method of software...
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