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Based on spectral symmetric cavity with respect to fiber Bragg gratings bandwidth, a 1120 nm narrow linewidth ytterbium-doped-fiber laser is demonstrated. A maximum output power of 14.67 W is obtained corresponding to an optical efficiency of 63.5 %. The measured center wavelength of the output laser is 1118.7 nm with a linewidth as narrow as 0.08 nm. The gain of the laser is more than 60dB above...
With the growth of EV number, large scale penetration of EV load may bring problems to the LV distribution network, such as voltage sags, transformer overload, circuit overload and etc. It has become a hotspot in related fields to study the impact that EV implementation will bring to the LV distribution network. In this paper, a set of EV charging load integration test system was designed and developed...
In order to facilitate the long-term and flexible experimental study of the mutual influence between the electric vehicle V2G technology and the power grid, this paper designs and develops a large capacity experimental platform for EV to grid. The paper presents the basic design idea of the V2G experimental platform. The AC/DC unit adopts the improved feed-forward compensation control strategy to...
This paper presents a new unsupervised classification method of polarimetric synthetic aperture radar (PolSAR) data based on dictionary learning. First, a multilevel distribution coding model is proposed to encode the probability distribution of the rearranged matrix of each pixel in a PolSAR image; this model can generate a stable and adaptive representation of the images, which can be used to extract...
A feasible scheme for construction of continuous variable odd-even coherent entangled channel is proposed in a novel linear optical network. The degree of entanglement of the desired entangled channel and success probability for generating maximal entanglement are discussed. It is showed that the degree of entanglement of the entangled channel generated in our scheme is only related with the assisted...
The innovation ability of a corporation depends so much on the learning efficiency about new knowledge. The learning efficiency is conditioned by the nature of knowledge, and accumulated knowledge of the company itself and the knowledge interaction among innovative networks. The point of this article is based on the energy transfer theory in the ecosystem. It generalized the factors which affected...
In a world of diminishing resources and increasing needs, every opportunity for recycling waste materials must be sought. Corn straw was fermented as a solid substrate for ornamental nurseries. The characteristics (nutrient content, pH and EC) of corn straw fermented substrate (CSFS) were measured and adjusted to adapt to the growth of the testing plants. We designed four kinds of cultivate substrate...
Power load forecasting is important in energy management with great influence on generation scheduling, operation and controlling electric power systems. Economic and precise short-term load forecasting is needed in power system planning and distribution and it can result in costing saving and better operation conditions. In order to reduce the load forecasting error, the concept of fuzzy time series...
A passive Q-switched Yb-doped microstructure fiber (MF) laser is demonstrated using a GaAs wafer as the saturable absorber. A high Ytterbium-doped fiber with a core diameter of 21 µm and a numerical aperture of 0.04 was used as the active fiber. The large-diameter core allows for greater energy storage than conventional single-mode core designs and the small NA of the core ensures the good beam quality...
Based on the theoretical simulation, a lens duct using as coupling system for laser diode array was designed and fabricated. A smooth and symmetric output beam with high quality was obtained. The coupling efficiency of the lens duct was larger than 91% which was better than the results reported previously.
A passive Q-switched Yb-doped microstructure fiber (MF) laser is demonstrated using a GaAs wafer as the saturable absorber. A pulse duration as short as 80 ns was obtained with the maximum repetition rate of 830 Hz. The maximum average output power is 5.8 W at 1080 nm wavelength.
In this paper, a segment extraction algorithm based on polygonal approximation for on-line Chinese characters recognition (OLCCR) is presented. With this method, the point with the smallest interior angle is detected and the whole stroke is split into two adjacent curves by this point, which is called as a cut-off point or an inflexion. To each of the two curves, the same step is performed to detect...
In this paper, a segment extraction algorithm based on polygonal approximation for on-line Chinese characters recognition (OLCCR) is presented. With this method, the point with the smallest interior angle is detected and the whole stroke is split into two adjacent curves by this point-which is called as a cut-off point or an inflexion. To each of the two curves, the same step is performed to detect...
In order to enhance the survivability of ASON, ASON must provide efficient recovery techniques to guarantee service continuity. This paper proposed a new path restoration algorithm with SRLG constraint to handle single-link failures in GMPLS-Based ASON (RSGA), whose restoration paths are pre-computed and stored in the routing table at each node. This algorithm can efficiently find physically disjoint...
In this paper, a new partial area matching method based on support vector machine (SVM) for distinguishing similar on-line handwritten Chinese characters is presented. With this new method, the similar characters are divided into several classes according to the difference among their structure features. After the candidate character set is obtained by the former recognizing steps, the SVM is used...
This paper presents a new multi-views face database and some development results on face recognition tasks based on it. Our objective is to find an efficient and simple algorithm for performing face recognition in real time. The image acquisition system is composed of five standard cameras, which together can simultaneously take five pictures of a human face from different perspectives. We address...
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