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Being different from general continual-data stream BER tester, the receiver of burst-mode BER tester is required to extract clock and recover data accurately from the incoming datasteam characterized by phase variation within a dozen bits time before error bits detection is conducted, moreover, while error bits detecting, the receiver should filter the preamble and delimiter and execute error bits...
The implementation of the virtual water strategy has broken the traditional mode of food production and agricultural water use, which has enhanced conservation of water resources and improved the ecological environment. However, this also affects the interests of the governments and the farmers of the upstream basin to a certain extent. From the view of virtual water strategy, this paper set up the...
The assessment of equipment trip probability due to voltage sag is a complicated matter because of the uncertainties both from voltage sag in power systems and sensitive equipment in customer side. The uncertainties of influencing factors are difficult to determine especially the stochastic distribution of voltage tolerance of equipment. The characteristics of voltage sag are determined by sag severity...
The impact of voltage sags on equipment is usually described by equipment failure probability, and it is in general very difficult to assess and predict because of uncertainties with both the nature of voltage sags at the power supply side and the voltage tolerance level of equipment. By defining the equipment failure event caused by voltage sags as a fuzzy-random event, a fuzzy-random assessment...
Objective: To investigate the effects of low frequency whole body vibration on preventing the bone loss of rats' lower limbs induced by tail suspended. Method: 40 male rats were divided randomly into 4 groups, including tail suspended group(sus, n=10), tail suspended + ground stimulus group (s+g, ground stimulus: 30min/d, 5d/w, n=10), tail suspended + vibration group (s+v, vibration stimulus: 45Hz,...
In the mechanics studies of human body structure, it is almost impossible to conduct mechanical experiments. Then the finite element model to simulate mechanical experiments has become an effective tool. In this article, femur model is put forword as an example to introduce several common methods of constructing three-dimension model. It can provide reference for getting femur biomechanical model...
Based on inverse dynamics, the muscle activities and joint forces of the subject lower limb with knee normal and knee lock postures under vertical whole body vibration with the frequency of 30Hz and the acceleration of about 0.5g were analyzed using AnyBody Modeling System. Using the Motion Capture System displacements of the marked points on the lower limb were monitored during vibrating process...
Concerning the problem of lane detection in the Lane Departure Warning (LDW) system, this paper presents one method to detect the region of lane marking based on the CIELab color features clustering. Color space can provide us more precious information than gray scale. This algorithm proves that it is feasible to recognize lane marking by using color clustering. According to the geometry feature of...
Based on the analysis of two current representative modes of financial subsidy to agricultural water by introducing the theory of economics, this paper, set up an incentive model of water-saving in the premise of financial subsidy, in order to explore a financial subsidy mode on agricultural water and agriculture water price mechanism suitable for present situation. The research shows that direct...
Sequence alignment is one of the most fundamental and important operation in bioinformatics. Through sequence alignment, we can find the sequence's information of function, structure and evolution. BLAST is one of the most popular algorithms in the field of sequence alignment. In this paper, we have designed a GPU-based parallel BLAST algorithm and implemented it on the brook+ platform. The main task...
Web services provide a complete new way of the loosely coupled service-oriented architecture and facilitate the process of application integration by encapsulating information and existing softwares. To exploit the true potential of Web services, it is vital to develop methodologies and tools for automatic Web service composition. Numerous Web service composition description languages have been developed...
Through an inter-temporal game between traffic department and tender enterprise, this paper, theoretically studied the general characteristics of the corruption in project bidding in infrastructure construction, and then, setting an example of the traffic infrastructure construction and water infrastructure construction, researched the sectoral characteristics of the corruption in project bidding...
The National Renewable Energy Laboratory (NREL) Phase II - IV wind turbine rotors[1] were used as the original research subjects in this article. In this paper, the numerical simulation method and business software FLUENT were used. The aerodynamic performances of different fixed-pitch, horizontal-axis wind turbine rotors were obtained through numerical computation. A rotational speed control model...
Design of RF pulses for parallel excitation using phased array transmit coils in MRI requires the B1+ maps that are estimated from B1+ mapping experiments. This paper characterizes the effects of B1+ mapping errors on the resulting excitation pattern using a small perturbation analysis based on linearization of the Bloch equation. The accuracy of the proposed perturbation analysis is validated...
Marine logistics service is one of the fundamental production services supporting the import and export businesses of other industries. The current marine logistics service eco-system formed spontaneously, and during its development, various types of service providers were stepwise imported and complex business collaborations formed between them. Based on our investigation on marine logistics services...
Motivated by the wide adoption of H.264 and the demand of universal multimedia data access over wireless network , this paper studies H.264 homogeneous video transcoding with spatial resolution conversion. Firstly , we propose a fast video transcoder ,working entirely in the DCT-domain,to convert high quality H.264 bitstream into low bit rate stream with low spatial resolution for wireless video access...
Web services provide an avenue of the loosely coupled service-oriented architecture and facilitate the process of enterprise application integration by encapsulating information, software and other existing resources. To exploit the true potential of Web services, it is vital to develop technologies and tools for Web service composition. However, for most of end-users, due to the lack of the knowledge...
A four-compartment ABR with an effective volume of 28 L was used to investigate the application of an anaerobic baffled reactor (ABR) in treating sugar-producing wastewater. The results indicated that the reactor could start up at an influent OLR of 2.5 kgCOD/m3-d and temperature of 35degC. COD removal rate could reach 89% on the 5th day. Then the influent COD increased from 5000 to 8000 mg/L, HRT...
Interprocessor communication is an important factor in determining the performance scalability of parallel systems. The communication requirements of a parallel application can be quantified to understand its communication pattern and communication pattern similarities among applications can be determined. This is essential for the efficient mapping of applications on parallel systems and leads to...
Fault location on transmission line influences the characteristics of voltage sag at given bus. It is difficult to determine the fault pattern and voltage sag frequency. A new method based on maximum entropy principle was proposed to assess sag frequency synthetically considered different fault types and objective probability distribution of fault location in the power system. The faulty line intervals...
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