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Pentaerythritol (PE) is a solid-solid phase change material with large latent heat. To improve its performance of thermal storage, nano-SiB6 particles were physically mixed into PE as nucleating agent with contents of 1 wt%, 3wt%, 5wt%, respectively. FTIR analysis was performed for pure PE, nano-SiB6 and the composites. The results show that there are no valence bonds between PE and nao-SiB6, and...
In nowadays digital audio watermarking still remains one of the hot research topics in the view of multimedia copyright protection. In this paper an improved patchwork-based au-dio watermarking algorithm in Constant-Q Transform (CQT) domain has been proposed. The advantage of CQT in music analysis lies in its nonlinear frequency spacing. However the absence of exact invertible transform still prevents...
As an important topic in cognitive radio ad hoc networks (CRAHNs) driven by local observation and control, throughput performance is closely related to the underlay/overlay spectrum sharing, medium access probability and route selection schemes. This paper discusses the theoretical throughput performance of a CRAHN based on local control and observation. We analyze the scaling law of throughput for...
This paper introduced an algorithm which is used to calculate the traction energy consumption in urban rail transit system. The algorithm of traction energy consumption is based on the train speed regulation model recommended by the CBTC (communication-based train control) system. According to the train speed regulation model, ATC (Automatic Train Control) system calculates the train speed status...
Combining cloud computing and mobile computing, a frame of Operational Command Training Simulation System based on mobile cloud computing was proposed, which includes infrastructure, platform, support, application and middleware layer. And the detail design of middleware layer was described. Some key technologies of the layer were settled as: cloud service access adapter, cache management and consistency...
In the open innovation era, knowledge searching promotes firms to build competitive advantages. Knowledge search balance, which results from various knowledge search strategy, is becoming the focus of theoretic research. After systematic review of some literature, this paper divides knowledge search into four types based on knowledge search district, search strategy, and search content. Then we discuss...
To detail a simulation scenario markup language based on XML and its resolving method. A set of heterogeneous simulation scenario data exchange rules is designed and generation method of the rules is proposed. Based on the data exchange rules, a exchange algorithm of database to RSML or RSML to database is designed.
Cognitive radio ad hoc networks (CRAHNs) have recently been proposed as a way to bring cognitive radio technology to traditional ad hoc networks. An important problem is to design a medium access control (MAC) protocol that addresses the decentralized control and local observation for spectrum management. In this paper, we propose a cognitive MAC protocol with mobility support (CM-MAC) based on Carrier...
Spectrum sharing is an important topic in cognitive radio ad hoc networks (CRAHNs) and cognitive radio sensor networks (CRSNs). Bio-inspired consensus-based protocols can provide light-weight and efficient solutions for CRAHNs and CRSNs but the theoretical ground should be investigated for spectrum sharing fairness. In this paper, we investigate the convergence condition when applying a consensus...
Spectrum sharing is an important topic in cognitive radio sensor networks (CRSNs). Bio-inspired consensus-based schemes can provide lightweight and efficient solutions to ensure spectrum sharing fairness in CRSNs. In this paper, in order to achieve the defined spectrum sharing fairness, we propose two schemes called the local control scheme for unbiased fairness (LCS-UF) and the local control scheme...
It is important to choose the voltage level of the mid-voltage distribution network objectively and accurately. An integrated model to choose the voltage level of the mid-voltage distribution network was proposed in this paper, in which analytical hierarchy process (AHP) comprehensive evaluation method to conduct a comprehensive evaluation was introduced. The model includes 5 indexs, such as economy,...
Time delay as well as error accumulation makes transmission of high-quality streaming media over multi-hop wireless networks more challenging. Since conventional TCP/IP-based protocol drops and retransmits the whole packet once error(s) occur above Physical Layer, which leads to long time delay and low efficiency in transmission, a new protocol for real-time streaming media transmission is proposed...
Effective power humidity temperature management is necessary for the safe and efficient operation of proton exchange membrane fuel cells (PEMFC). Therefore a PEMFC modeling method and an intelligent proportional integral differential (PID) control based on neural networks strategy are presented in the paper to keep the PEMFC within the ideal operation range. Firstly, a power humidity temperature mathematical...
Traffic congestion is a severe problem in many modern cities around the world. The non-recurring occurrence of incident-induced congestion sometimes may cause large-scale traffic congestion. This paper proposes an intelligent-based prediction system, Fuzzy-Neural Network Prediction System (FNNPS), as decision support to operators. Fuzzy algorithm is used in FNNPS to handle the different sources of...
In this paper, green microfibers of barium titanate precursor were prepared by the combination of Sol-Gel processing and Gel-spinning technique. The piezoelectric microfibers of ceramic BaTiO3 were sintered, with diameter of 15μm and length of 20mm, respectively. Interdigitated electrodes were printed on an epoxy resin substrate. BaTiO3 microfibers were then aligned on the interdigitated electrodes...
A conversion was facilitated with magneto-electric effect between energies stored in ferromagnetic form and piezoelectric one in material. This paper is concerned with magneto-electric performance of composites with a bi-layered structure for ceramic (Na0.5K0.45Li0.05)(Nb0.9Ta0.08Sb0.02)O3, i.e., KNN, and metal nickel. Lead-free piezoelectric KNN ceramics were synthesized by the two-step sintering...
Mobile payment is a kind of means of payment as the carrier of mobile terminal. In the user's intention to use mobile payment, there exist many obstacles. Based on the research of technology acceptance model, this paper studies on the key factors which influences mobile payment user behavior to provide the development of China mobile payment industries with certain reference.
Research and development of simulation system is related to strategic, geography, computer, virtual reality and other technology, which requires a lot of manpower and material resources. Simulation system developed in ifferent technology can interoperate easily through HLA, and different systems or components will rebuild many different distributed simulation system. The distributed drill simulation...
Sodium hypochlorite as oxidant was used for adsorbing phosphine, which was emitted from sodium hypophosphite industry. The effects of the available chlorine density and pH were mainly studied via experiments. The results can be concluded that when the speed of carrier gas flow is 20 mLmin-1, the temperature for reaction is about 20°C with pH at 9, and the density of sodium hypochlorite solution is...
A passively cooled Fresnel lens concentrating photovoltaic module (FLCPM) was made and its performance was tested and analyzed. The module consists of a 0.480 m×0.480 m Fresnel lens array of 16 Fresnel lens with the size of each being 0.120 m×0.120 m, and the sunlight was concentrated onto 16 silicon solar cells with the size of each being 0.025 m×0.025 m that were placed at the focuses of the lenses...
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