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A silicon-on-sapphire (SOS) micro-ring resonator was fabricated and characterized at 2.75µm by thermal tuning. The measured extinction ratio in the drop port is about 10dB and the Q factor is about 2000.
According to less attention has been paid to the problem of path planning in partially know environment. An improved Focused D* algorithm is proposed for solving the problem that three-dimensional path planning for Unmanned Combat Aerial Vehicle (UCAV) in dynamic and uncertain environments with both pop-up and unknown threat. First, a grid model of configuration space were constructed which combination...
A real-time task assignment scheme for multiple Unmanned Combat Aerial Vehicles (UCAV) operating in uncertain environment is proposed in this paper. Firstly, the situation in the uncertain environment and the uncertainty of the battlefield are analyzed. Then, a stochastic system model and a team utility Kfunction which take several indicators into account are established for multi-UCAV real-time task...
In this paper we report propagation and bend loss measurements for silicon-on-insulator (SOI) and silicon-on-sapphire (SOS) waveguides at 3.39 µm wavelength. Preliminary experimental results for SOI rib waveguides at around 3.8 µm are also given.
Reliability of wireless communication can be improved by utilizing various diversity schemes, which are seriously desired by the heavy haul railway transportation systems. The transmission of control message is a significantly vital issue and suffers from severe channel fading and interferences, which may result in failures of locomotive control. This paper proposes a novel hybrid cooperative scheme...
For the Long Term Evolution (LTE) system in 3rd Generation Partnership Project (3GPP), the calculation of synchronization signal detection algorithm is very complex. According to the properties of the primary synchronization signal (PSS) and the secondary synchronization signal (SSS), a modified algorithm is proposed in this paper, which processes correlation of the received samples only once with...
The capacitive power transfer (CPT) system and inductively power transfer (IPT) system are the two typical wireless power transfer systems. Based on the power transmission characteristics, the power transfer capacity of the two wireless power transfer system was analyzed. Firstly, the maximum power transfer capacity and its existing condition of the two types of wireless power transfer system were...
The article uses the service management of our large retail chains as research object, uses "retail chains service management processes" as train of thought. On the basis of extensive market survey, the writer analyses service management current situation and problem of our large retail chains objectively. To strengthen service management, the writer proposes countermeasures including optimizing...
We report the design, simulation and experimental results of a hybrid silicon laser with side-cladding Bragg grating as wavelength selective component and erbium doped fiber as gain medium. Over 35dB side-mode-suppression-ratio (SMSR) is achieved.
In recent years, many large onshore wind farms are constructed or under construction all over the world. In northwest region of China, the planned capacity of onshore wind farms has reached over 20GW in total. However, the locations of those wind farms are very remote and far away from load centers, and their distance to load centers are beyond 1000km. Therefore, it's of primary importance to address...
In this paper, we proposed an automatic evaluation method for Chinese handwritten ability, research on information card design, algorithms of image processing and the index computation of automatic evaluation. Image processing includes distortions detecting, stretching detecting, image de-skewing and image enhancement, the index computation of automatic evaluation based on features of global character,...
For the series of U-channel section, which has similar structure, it is easy to adjust the geometric model of U-channel section by using parametric design method, the efficiency is improved and the time for product design will be shortened greatly. By using the ANSYS Parametric Design Language (APDL), the FEA process including creating FEA model and analysis steps is discussed with the finite element...
Grid division in finite element is very important to carry out simulating analysis, it directly affects the following calculation accuracy for analysis result .In view of this, and this article uses four kinds of different ways of grid division to mesh gear-tooth root spot during the course of finite element analysis of gear meshing. Through drawing up and comparing the von mise tendency chart of...
Interference is one of the predominant factors that determine the performance of the wireless communication networks. The recent increasing interest in Quality of Service (QoS) and Quality of Experience (QoE) has motivated the development of interference evaluation capable of capturing the characteristics of the networks. Consequently, a great number of methods to evaluate the interference can be...
Objective To explore slides protein microarray preparation methods, For tumor markers detection provide economic, convenient, simple and feasible laboratory testing means Methods Agarose membrane modified slides, manual some samples, 3% bovine serum albumin closed,and detection tumor markers using this slides protein microarray. Results Determine the optimum preparation condition and detection condition...
Land use and land cover change (LUCC) plays an important role in the evolution of the global environment and sustainable development. Land use is related to natural geography and human actions, and the factors during some period are mainly studied in LUCC. Most researches are concerned about rural area but few about urban fringe area. In this paper, land use change in the outskirtsis studied, taking...
This research, in selection of constructed wetland system planted with reeds and cattails, takes vertical and horizontal flow experiment for study of TN removal out of sewage in various temperatures and waterpower length of stay. The effect and ratio of removal of sewage TN, ammonia nitrogen can be approached. The test shows that, temperature and TN removal have some correlativity, namely, the TN...
The impact of antenna array geometry on MIMO (Multiple-input Multiple-output) system in high speed railway scenario is investigated in this paper. The capacity of different antenna arrays and the effect of ULA (uniform linear array) azimuthal orientation on capacity are studied with a double-directional channel model including antenna effects and Doppler shift.
During almost fifty years, fade duration distribution (FDD) of random signals has been an open research topic. However, for Weibull fading channels, closed form solutions are still unknown. Minimum duration outage (MDO) definition is decisive to complement the traditional outage concept and it has been reported, up to now, only for Log-normal shadowing, Rayleigh fading and Nakagami fading. In this...
Environmental issues occur in regions of desertification from highway construction. Before and after the road construction, it impacts the rate of sand transporting from variance of local vegetation coverage, ground properties, and soil water contents etc. This article concerns also the dune activation rooted from sand borrowing, seeking for a perturbation mechanism upon local ecology from desert...
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