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In order to comprehend user information needs by concepts, this paper introduces a novel method to match relevance features with ontological concepts. The method first discovers relevance features from user local instances. Then, a concept matching approach is developed for matching these features to accurate concepts in a global knowledge base. This approach is significant for the transition of informative...
A dual transformation system to transform neutral speech to emotional speech is proposed in this paper. Since spectral and prosodic features are key factors that influence the emotional effects of speech, Gaussian Mixture Model (GMM) method and the prosody rules algorithm are applied to transform the spectral and prosodic features respectively. In this paper, we transform neutral speech to angry,...
Although international shipping is the most energy efficient mode of mass transport and only a modest contribution to overall green house gas emissions, some approaches to improve its effective emission control is still needed as sea transport will continue growing with world trade. The construction of evaluation standard for the vessels is significant for guiding and facilitating the shipping companies...
Scalability and Latency are the two important performance indicators for the distributed file system, and Google and Apache have achieved a great success with GFS and HDFS when operating big files, but the latency is too long when reading and writing small-size files, because the concurrent I/O can't work for small files, besides the master node is difficult to extend in the cloud storage system with...
Previous work has already testified from both theory and simulation that for enough diverse workload, heterogeneous chip multi-core processor(CMP) can deliver higher performance per watt over comparable homogeneous multicore processor. But, the prerequisite is that operating system can recognize this diversity and then take an effective and reasonable task scheduling. We implemented an asymmetric...
Polycrystalline molybdenum nanotips can be grown on stainless steel substrates by simple thermal vapor deposition. Individual nanotip has very good conductivity of typical average value of about 4.99×104 Ω−1cm−1; ie, only an order of magnitude less than the value of bulk Mo. The field emission (FE) measurements exhibit good performance, i.e, turn-on field of ∼1.6 MV/m and threshold field of ∼3.1 MV/m,...
In the existing large-scale performance test of IPsec tunnel, it often needs special software and hardware. To solve the problem, this article proposed a new method, in which packet was encapsulated in user space, and a multi-tunnel controller was designed and implemented with the method of FSM(finite state machine), which controlled the negotiation and establishment of multiple tunnel, including...
We present a systemic study on the tailoring of light emission properties of the GaN-based light-emitting diodes (LEDs) with nanoparticle-assembled on-top layers. A layer of silver nanoparticles is deposited on the top of the InGaN/GaN quantum wells (QWs) in gas-phase. The coupling of spontaneous emission from InGaN QWs into the surface plasmon modes of silver nanoparticle layer is demonstrated. The...
Three kinds of oils, they are diesel oil, motorcycle oil and gasoline, were adopted as the polluted sources, and the hyperspectral polarimetric characteristic of soil polluted by different oils was discussed. Experimental results have shown that soil polluted by oil has remarkable polarimetric characteristic compared with clean soil. Besides, the hyperspectral polarimetric characteristic of soil polluted...
In recent years, structural health monitoring has received extensive attention in civil and mechanical engineering communities. Due to direct and converse piezoelectric effect, piezoelectric materials, such as, PZT has provided a efficient sensing technique- piezoelectric guided wave for structural health monitoring. In this paper, a numerical study on crack identification of a cantilever steel beam...
According to the power model based on algorithm complexity, we analyze the power characteristic on both the algorithm level and micro-architectural level. Therefore, we propose a fusion power model that combines both algorithm level and micro-architectural level. We extract the time complexity and space complexity on the algorithm level, the CPI(Cycles Per Instruction) on the micro-architectural level...
Using Visual C++ and OpenGL, a simulation system for a specific type of robot is provided in this paper. It is a modular simulation system, which contains offline programming, robot assembly and teaching and playback modules. Part model of robot that constructed by other software is imported and assembled in the simulation system for simulation analysis. It can realize kinematics calculation, 3-dimensional...
Cochlear implant is one of the most promising medical applications aiming to utmost restore deaf patients hearing. How to improve voice quality by using effectively algorithms has become a bottleneck. In our research, a new speech signal processing scheme is given based on Bark Wavelet Transform (BWT). This signal-processing strategy can non-uniformly separates the time-frequency space, which is similar...
Driving torques of a specific type of spot welding robot was simulated in RecurDyn, which provided useful information for motor selecting and gravity balancing. According to D-H parameters of the robot parts of the robot were modeled separately and then assembled to form the robot, in Pro/Engineer. Imported into RecurDyn and adding necessary constraints, the virtual prototype of the robot was constructed...
With the rapidly growing e-commerce expansion of its online shopping, including convenience shopping-mode and cheaper price pervasived penetration of our lives. China's online shopping market in 2010 close to 500 billion deal size, total retail sales of social consumer goods accounted for 3.2%; At the same time, online shopping 148 million subscribers, the penetration rate in Internet users amount...
Energy efficiency is a key issue in the design of wireless sensor networking systems because each sensor node carries power source of limited capacity and cannot be easily replaced. To achieve high energy efficiency, a typical approach is to cluster the sensor nodes in some way so that energy is conserved. In practice, it is critical to select some nodes as cluster-heads to form clusters so that the...
Network lifetime is one of important performance index for wireless sensor networks. It is essential that the tasks are assigned in the wireless sensor networks in order to complement this index. Therefore, a new energy-saving task assignment method is proposed. This method describes a cost function based on entropy theory according to the nodes status, such as computing resources, the residual energy...
This paper studied the influencing factors of enterprise reverse logistics performance. We focus on how the returned product recovery rate affects company overall reverse logistics performance. Company Finance Performance, Social Benefit and Environment Concerns are adopted to describe its reverse logistics performance. Meanwhile, product recovery rate is indicated by Recycle Network Condition as...
A mechanical sensing system based on PVDF piezoelectric sensor was designed. Piezoelectric equation of PVDF was studied and simplified for data analysis. The algorithm of power frequency elimination was detailed studied. 4-times sampling was adopted during A/D transformation and the noise induced by 50Hz power frequency was minimized. Butterworth low-pass filter and trap filter was used for noise...
A co-simulation on virtual prototype of a type of spot welding robot has been accomplished by combining MATLAB/Simulink with RecurDyn. The control algorithm is executed under MATLAB to generate command forces, which are then exported to RecurDyn environment and applied to actuators of the virtual prototype at each cycle of time. Dynamic control on joint angles was accomplished through the co-simulation...
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