will introduce a design method of test question database management system based on the three-tier B/S structure, analyze the features of the test question database structure, and expatiate the grouping algorithmic calculation focusing on the main control parameters of knowledge points and question type data

Abstract — This paper presents and analyzes an architecture that exploits the serendipitous movement of mobile agents in an environment to collect sensor data in sparse sensor networks. The mobile entities, called MULEs, pick up data from sensors when in close range, buffer it, and drop off the data to wired access points when in proximity. This leads to substantial power savings at the sensors as they only have to transmit over a short range. Detailed performance analysis is presented based on a simple model of the system incorporating key system variables such as number of MULEs, sensors and access points. The performance metrics observed are the data success rate (the fraction of generated data that reaches the access points) and the required buffer capacities on the sensors and the MULEs. The modeling along with simulation results can be used for further analysis and provide certain guidelines for deployment of such systems. I.

A three-tiered language for the specification of micro-architectures is developed. (i) The structural and invariant properties to be maintained in the collaboration among the objects in the micro-architecture are specified in the lowest tier. (ii) The behaviour of the object methods

A three-tier logistics/production model is developed that addresses the integration of suppliers, manufacturers and distribution. The model can be applied at either micro (within facility) or macro (between facilities) levels. The multi-echelon problem is formulated to minimize overall inventory

for future multimedia workloads. Our research uses a three-tiered approach. First, we analyze a 200-day trace of over 20 terabytes of Kazaa P2P tra#c collected at the University of Washington. Second, we develop a model of multimedia workloads that lets us isolate, vary, and explore the impact of key system

in performance over their synchronous counterparts. In this paper, we present the design of a 3D AFPGA, fabricated in MIT-LL’s 3D (3-tier).18µm SOI technology. The logical resources for the 3D AFPGA were kept the same as the original 2D design, while the switch boxes were expanded with inter-layer channels

The proliferation of topic hierarchies for text documents has resulted in a need for tools that automatically classify new documents within such hierarchies. Existing classification schemes which ignore the hierarchical structure and treat the topics as separate classes are often inadequate in text

survey of different routing techniques. Overall, the routing techniques are classified into three categories based on the underlying network structure: flat, hierarchical, and location-based routing. Furthermore, these protocols can be classified into multipath-based, query-based, negotiation-based, Qo

positives for any of the many different programs that we tested. Further, we show how we can use a two-tiered approach to build a hybrid exploit detector that enjoys the same accuracy as TaintCheck but have extremely low performance overhead. Finally, we propose a new type of automatic signature generation

them to the system and locates them accurately in three dimensions. The platform builds a dynamic model of the environment using these location sensors and resource information gathered by telemetry software, and presents it in a form suitable for application programmers. Use of the platform