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For image representation methods of image classification, it is very important to represent the image well. In this paper, we propose a novel representation method for image classification, which can combine the advantage that the sparse representation can effectively use image information and the advantage that the PCA method can effectively eliminate the interference of irrelevant image information,...
Micro-quadrotor has recently been used in different areas even military field. However, controlling mini-quadrotor to flight attitude in the air has not been perfectly achieved due to mini-quadrotor's small size and light weight. The purpose of this paper is to introduce the flight attitude control system of mini-quadrotor, including design and simulation of calculations and controllers. By using...
This paper presents a low power 10-bit 200MS/s successive approximation register analog-to-digital converter (SAR ADC) with 1.5bit redundant acceleration. In this design, technique of 1.5bit redundant acceleration is used in second bit of SAR ADC, which reduces the building waiting time of first bit without other comparison clock consumption. To realize low power, a brand-new 3-D 1-fF MOM unit capacitor...
Seepage of underground oil-gas reservoirs will bring stress effects for poisoning of roots of vegetation in the environment, which will be reflected in vegetation canopy reflectance spectra. In order to explore how to extract anomalous vegetation resulting from natural oil-gas microseepage by hyperspectral remote sensing images, this paper presents a data processing flow for effectively extracting...
Social network is a reflection of a social structure, composed of actors and one or several kinds of their mutual ties. Social Network Analysis (SNA), matured in 1970s, is a piece of art and technology quantitatively analyzing social relations. Dynamic Network Analysis (DNA), proposed in 2002, integrates Social Network Analysis, Link Prediction, Multi-Agent Simulation methods and technology, and its...
In recent years, active contour models have become one of hotspots in the field of image segmentation. However, for ultrasound images, it is difficult to achieve ideal segmentation results with those methods that only based on boundary information or regional information. In this paper, we combined GVF-Snake with CV model. First, preliminary segmentation is implemented with CV model. Then, the local...
Due to the fact that most of current E-learning systems have problems of insufficient personalization, this paper puts forward the idea that completes the personalized knowledge search based on the open source E-learning system, then constructs domain ontology that are used to build user interest model, and finally, this model is embedded in Notch search engine to realize the personalized knowledge...
The killing of Microcystis aeruginosa by strong ionization discharge was studied experimentally. The relation of aeration amount, initial content of bacterium, treatment time, PH value and temperature to the killing rate of Microcystis aeruginosa was studied. The experiment has show that in a certain degree, the killing rate of Microcystis aeruginosa was raised with the increasing of aeration amount,...
This paper studies the correlation between the urban morphology and urban comprehensive strength. We select 31 cities with a population over one million in 1990 as our samples. Specifically, we introduce a powerful new clustering methodology, affinity propagation clustering, published in “science” in 2007, to cluster urban shape indicators. Then, using principal component analysis, we evaluate the...
Effects of formaldehyde degradation using strong ionization discharge were studied. A majority of gas molecules in the air such as O2 and H2O were ionized and maken into OH ·of high concentration using strong ionization discharge method to carry out formaldehyde removal experiment without catalyst and absorbent. Some factors such as exerted voltage, initial concentration, fume flow, which affect the...
A new style whirl ventilated slag cooler model was established based on the analysis of those slag cooler which were widely used in CFB in the world. The analysing and modeling results present that the new style whirl ventilated slag cooler have the characteristics of simple configuration, high heat transfer efficiency, high volumetric efficiency and lower gas-solid ratio, which could be a good auxiliary...
Involvement of cellular surface factors in cellular lipid efflux mediated by lipid-free apolipoprotein has been investigated. Lipid-free human apolipoprotein (apo) A-I generated net efflux of cholesterol and phospholipid from mouse peritoneal macrophages and rat aorta smooth muscle cells. Ratio of cholesterol to phospholipid was much lower in the lipid released by this mechanism from the smooth...
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