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Online reviews contain a plethora of useful information that plays a vital role in consumer choices and provides a dominant reference for enterprises to adopt strategies for product development and improvement. The paper examines the www.zol.com.cn website as a source of information and Huawei Mate phones as a research target, processes the data of consumers’ online reviews on three types of Huawei...
Global Positioning System technology has been widely used in vehicle tracking and road planning applications. An enormous amount of data concerning the trajectories of vehicles has been collected and stored for tracking purposes. A trajectory contains not only the footprints of a moving object but also additional information, such as speed and stopping points. Therefore, the large-scale trajectory...
While e-commerce has grown substantially over last several years, more and more people are utilizing this popular channel to purchase products and services. Thus the ability to predict user demographics, including gender, age and location has important applications in advertising, personalization, and recommendation. In this paper, we aim to automatically predict the users' genders based on their...
Extracting opinion words and targets is a main task in opinion mining. This paper proposes a novel approach with a dynamic process of joint propagation and refinement. In the propagation process, two initial datasets of opinion words and targets are separately obtained by given seed words and seed dependency patterns under the pre-defined extraction rules, and meanwhile new dependency patterns are...
Open source projects often maintain open bug repositories during development and maintenance, and the reporters often point out straightly or implicitly the reasons why bugs occur when they submit them. The comments about a bug are very valuable for developers to locate and fix the bug. Meanwhile, it is very common in large software for programmers to override or overload some methods according to...
In this paper, we firstly describe improved Adaboost algorithm, and then introduce wavelet moment, which has rotation, shift, scale moment invariants and multi-resolution characteristic, and which can not only extract image local feature, but also can extract global feature. so it is more stronger to oppose noise. This paper proposes dynamic pyramid changing idea of detector scale. A cascade classifier...
A novel image perceptual hashing method is proposed on the intermediate hashing stage. It first uses the iterative geometric techniques to get main geometric features. Then, by the observation that the distances of feature points are invariant in the polar coordinate under arbitrary rotation, a novel processing method is proposed to arrange the two-dimensional distribution to a one-dimensional feature...
Image searching and authentication have become strong requirements in the digital world. Image perceptual hashing has been proposed to meet them. In this paper, a rotation resilient image hashing algorithm is presented. In the algorithm, the position information of original image is extracted to adjust the rotation. Then the features of the image are extracted by contourlet transform. The key-dependence...
Sectional views are widely used in engineering practice due to their clear and concise expression. However, large numbers of entities are missing in sectional views that makes it hard for computer to understand drawings. Feature identification is the key procedure for solids reconstruction from sectional views. Based on the analysis of the default drawing rules appearing in sectional views, a new...
A novel image perceptual hashing algorithm is proposed on the intermediate hashing stage. It first uses an iterative geometric technique to extract significant geometry preserving feature points. Then, the fuzzy distance matching method is proposed based on the observation that the distances of feature points are invariant in the polar coordinate under arbitrary rotation. It is verified that the proposed...
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