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Probing is a technique used for network monitoring and measurement applications, including detection of silent failures and performance analysis to verify compliance with service-level agreements. Many existing approaches to probing-path selection seek to minimize the number of probes (an NP-hard problem) or to minimize probing delay, but they fail to properly assess the network overhead imposed by...
Today the technology advancement in communication technology permits a malware author to introduce code obfuscation technique, for example, Application Programming Interface (API) hook, to make detecting the footprints of their code more difficult. A signature-based model such as Antivirus software is not effective against such attacks. In this paper, an API graph-based model is proposed with the...
Non-lossy compression can save time and energy during communication if the cost to compress and send input is less than the cost of sending it uncompressed. Unfortunately, compression can also degrade performance, no single method is always beneficial, and outcomes depend on many factors. As a result, compression choices in real systems are coarsely grained and manually controlled, resulting in suboptimal...
As aggressive integration paves the way for performance enhancement of many-core chips and technology nodes go below deca-nanometer dimensions, system-wide failure rates are becoming noticeable. Inevitably, system designers need to properly account for such failures. Checkpoint/Restart (C/R) can be deployed to prolong dependable operation of such systems. However, it introduces additional overheads...
Performance of wireless sensor network in several fields has become a key parameter in the research area. Nowadays it is dependent on several factors and energy consumption is one of the important parameter. Various issues regarding the performance of the wireless sensor network (WSN) have been referred, out of which energy efficiency is one of the research issue. In order to monitor the environment...
Analyzing the system of several Chinese word segmentation algorithms for the current existing problems, we design and construct a new dictionary mechanism. We present a segmentation algorithm, forward maximum matching method that adding 1 word each time and self-define the IDC function as disambiguation algorithm to achieve a relatively complete system of experimental Chinese word segmentation. By...
With the expansion of urban construction and the user's growing, China's urban heat-supply institution has pay more and more attention to the heating pipe network optimal planning and reconstruction work. The optimization of urban centralized heat supplying system research, not only to save investment, reduce heating energy consumption and improve the enterprise benefit have important meaning, and...
The layout of water quality monitoring sites of Changzhou could be optimized for the purpose of reducing the associated expense. Based on the monitoring data during the year of 2001-2004, principal component analysis (PCA) and cluster analysis (CA) were combined to be applied for the optimization of monitoring sites. Main results showed that three PCs contributed to the cumulative variance greater...
The combustion process, was numerical simulated based on the H2/O2 nineteen steps chemistry kinetics mechanisms and catalytic combustion mechanisms in a sub-millimeter parallel plate combustor, which is applied to a novel modular micro thermal photovoltaic system. The results show that the temperature of the combustor outside wall is affected by combustor height, H2/O2 ratio, nozzle shape. According...
Field synergy between the molten steel flow field and the temperature distribution was analyzed at first in this paper. It shows when the synergy angle between the molten steel flow field and the temperature gradient field is more than 90° in the tundish, the molten steel temperature distribution is more homogeneous and the synergy number is smaller. Then the flow fields and temperature distributions...
Heat exchange network synthesis has been an effective method in industrial energy recovery system but seldom used in building energy system because of their low enthalpy features. This paper presents a methodology of multi-period synthesis and design optimization of large public building energy system based on pinch analysis concepts and mathematical programming methodology. An updated energy recovery...
This paper studied the wastewater treatment in GAO Yang Dyeing and Textile Industrial Park, with the dealing capacity of 19 × 104 ton/d, on its wastewater discharge, water reuse, energy saving and resources utilization. Through the process optimization consisted of the enhanced chemical conditioning, diagonal up-flow anaerobic reactor, intelligent closed-loop oxygen supply system, double membrane...
With the deepening of the industry market-oriented reform and the increasing demand for the market demand responding speed, the role of logistics system in the cigarette business enterprise services value chain becomes more and more apparent. First, the value chain are analyzed, which are embedded in the modern cigarettes logistics. Second, the every link of cigarettes logistics is deeply disintegrated...
The workload adaptation is a performance management process in autonomic database management system (DBMS). In the workload adaptation framework, the system monitoring component monitors the database resources consumption at SQL command level, and feed back the monitoring information to other related components in this framework. This paper analyzes the functional structure of the system monitoring...
Task conditioning aims to provide each occupant with personalized clean air direct to the breathing zone. Microenvironment of a typical office workplace consisting of different task air conditioning system, such as CMP (computer monitor panel), MP (movable panel), horizontal desk grill (HDG) and vertical desk grill (VDG) are studied by numerical simulation. Numerical simulation by k-epsiv 3-D turbulent...
A novel real-time optimization approach for two-way direct load control (TWDLC) of central air-conditioning chillers is proposed. For TWDLC, the main computer in the control center constantly monitors the average controllable load of every customer. For real-time calculations, a computationally fast and effective approach based on linear programming is proposed to determine the shedding ratio of every...
Grid can integrate massive idle resources into a high-performance supercomputer, which is good choice for resolving the complicated engineering optimization problems. However, the heterogeneous, distributed and dynamic characters of the grid resources makes tasks scheduling are very difficult in the engineering optimization. A grid scheduling algorithm which is based on resources monitoring and load...
Present and future semiconductor technologies are characterized by increasing parameters variations as well as an increasing susceptibility to external disturbances. Transient errors during system operation are no longer restricted to memories but also affect random logic, and a robust design becomes mandatory to ensure a reliable system operation. Self-checking circuits rely on redundancy to detect...
In many DSP applications (image and voice processing, baseband symbol decoding in high quality communication channels) several dBs of SNR loss can be tolerated without noticeable impact on system level performance. For power optimization in such applications, voltage overscaling can be used to operate the arithmetic circuitry slower than the critical circuit path delay while incurring tolerable SNR...
The research presented in this paper aims at developing and validating a predictive tool of individual exposure to solar Ultra-Violet (UV). UV exposure depends on ambient irradiation level and individual factors related to activity (position to the sun, clothing, duration of exposure, and other forms of sun protection). We predict exposure levels of body parts on basis of ambient irradiation levels...
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