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The effects of different ethanol–diesel blended fuels on the performance and emissions of diesel engines have been evaluated experimentally and compared in this paper. The purpose of this project is to find the optimum percentage of ethanol that gives simultaneously better performance and lower emissions. The experiments were conducted on a water-cooled(More)
Cognitive radio (CR) systems have been proposed to efficiently exploit the spectra that have been assigned to the primary network but are in underutilization. In this paper, we consider the guard channel policy where certain number of channels is dedicated to primary network calls and the policy in which this number of channels is dynamically adapted to the(More)
Laser acupuncture is defined as the stimulation of traditional acupuncture points with low-intensity, non-thermal laser irradiation. It has been well applied in clinic since the 1970s; however, some traditional acupuncture manipulating methods still cannot be implemented in the design of this kind of instruments, such as lifting and thrusting manipulating(More)
Through the research on the traveling wave transform characteristics of the current transformers (CTs), a description method is proposed by using transfer function to replace the phase- and amplitude-frequency characteristics of the current transformers. In the presented technique, the free alternating current of various frequencies is injected into the(More)
A study of engine performance characteristics and both of regulated (CO, HC, NO(x), and smoke) and unregulated (ultrafine particle number, mass concentrations and size distribution) emissions for a turbocharged diesel engine fueled with conventional diesel, gas-to-liquid (GTL) and dimethyl ether (DME) fuels respectively at different engine loads and speeds(More)
By adopting a continuation approach, the position analyses of a novel 3-5R parallel mechanism, which has three translation degrees of freedom, are conducted. Next, an equation system of the mechanism structure constraint and an initial equation system are established. Next, a versatile software for solving polynomial equation system is compiled. As giving(More)
Marine engine room’s unmanned monitoring is the basic requirement for modern ship steering and control. The definition, developmental trend and the monitoring requirements of unmanned marine engine room are introduced. Take a practical application in the marine engine room as an example; the components of the unmanned monitoring system are analyzed.(More)
Understanding the characteristics of Doppler frequency and Doppler frequency rate is a first knowledge in designing a Global Navigation Satellite System (GNSS) receiver, which is important in choosing GNSS signal acquisition and tracking strategies. However, there lacks a work that comprehensively derives and summarizes receiver Doppler frequency and(More)
DNA computation is a new computing model with high performance in storage of DNA molecules and parallelism of biochemical reactions, but it needs complex conditions of biochemical operation, likely astable and uncontrollable. The main work of this paper is optimizing GN algorithm to solve a graph clustering question on social networks, which simulated on(More)
In order to ensure the safety of the operators who work with traffic cones in the freeway, we design an automatic traffic cone placement and retrieval vehicle. This vehicle can be used to place traffic cones rapidly under the maintenance of the freeway or to isolate the scenes of traffic accidents. By placing and retrieving traffic cones automatically with(More)