The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
With the increasing concentrations of the air pollution and reduction of fossil fuels the electric buses with carbon-reduction and energy-conservation technology have been extensively encouraged. The battery technology as the significant determinant will directly affect the practical utilization of the buses. The Lithium Titanium Oxide (LTO) battery is becoming increasingly popular as the battery...
A vision-based perception system for understanding the outdoor environment has been proposed. This system utilizes and applies the useful information from the binocular cameras of a legged robot for landform — terrain — ground environmental perception. The ground texture recognition can provide information about the material of the ground then a legged robot can choose an appropriate walking pose...
Urban evacuation is of great significance in saving human lives when disasters strike major cities. Comparing with the large population to evacuate, the number of evacuation guiders is much smaller. Since the location of evacuation guiders can greatly influence the evacuation process, it is crucial to identify the most critical locations to assign guiders. The assignment optimization for evacuation...
Many academic researchers have been engaged in the visual servoing based regulation of quadrotors over the past decade, and proposed a lot of controllers for this challenging problem. The regulation controller presented in this paper adopts the Position Based Visual Servoing (PBVS) methodology. Most of the PBVS controllers, if not all, are assuming the position of the quadrotor w.r.t. the marker is...
The identification accuracy of dynamic loadings for the rock roadheader has significant impact on economic benefits and safety productions in coal mines. Aiming at the problems that there are difficulty regarding dynamic load real-time identification when the rock road-header is performing cutting tasks under changing loads, this paper designs software real-time identification when the rock road-header...
At present, the optical fiber differential protection is widely used in high voltage power grid. However, due to the limitation of technology and equipment, there are still some reasons for the normal operation of optical fiber protection. In this paper, according to the actual operation of the optical fiber differential protection, the impact of optical fiber differential protection is analysed and...
Data mining can provide support for bank managers to effectively analyze and predict customer churn in the era of big data. After analyzing the reasons for the bank customer churn and the defects of FCM algorithm as a data mining algorithm, a new method of calculating the effectiveness function to improve the FCM algorithm was raised. At the same time, it has been applied to predict bank customer...
The visual servoing based pickup of stationary objects (or regulation, etc.) has attracted many academic researchers and industrial engineers over the past two decades, and numerous control strategies are proposed for this challenging problem. The controller proposed in this paper follows the Position Based Visual Servoing (PBVS) paradigm. Most of the PBVS controllers, if not all, are designed assuming...
Ontologies play an increasingly important role in emergency domain. They have become essential components of emergency response system. Development of emergency ontology is a laborious and difficult task because of the increasingly scale and complexity of the ontology. This paper proposes the concept of Event Ontology Pattern (EOP) and the development method of EOP, which is to capture formally reoccurring...
This paper introduces a circularly polarized omni-directional antenna, which is composed of a monopole antenna and 6 patches of metamaterial polarizers. Each metamaterial polarizer includes three closely spaced metallic wires printed on a dielectric substrate. The metamaterial polarizer is used to transform the antenna radiation from linear polarization into circular polarization. Axial ratio (AR)...
This paper presents an electromagnetic tracking method based on two electrically-controlled magnetic sources. Each source consists of three mutual orthogonal coils. The method can skillfully determine the rotation angles of the maximum magnetic flux density vector (MMFD V) generated by a magnetic source according to the Biot-Savart Law. Then the position of the sensor can be calculated with a noniterative...
The paper describes the implementation of a 40-MS/s 14-bit pipelined analog-to-digital converter (ADC) for CMOS image sensors in 0.18μm CMOS technology. The pipeline architecture consists of a series of 2.5bit stages, one stage 2-bit flash ADC and time align & digital error correction circuit. The ADC design is provided with a differential input voltage range of ±1V, 3.3 V power supply, and a...
Faced with the growing demand of highway message propagation, network security, as well as the great challenges of global energy crisis, mobile interconnection and energy conservation are considered to be the key factors to promote the development of automotive electronics innovation in Intelligent Transportation System (ITS). Existing network planning is mainly performance-oriented and often neglects...
Event ontology is a new paradigm for describing event-based knowledge in web, including action, time, place and objects in event. But it lacks a unified language for description of event classes or event individuals. Simple Knowledge Organization System (SKOS) is a common data model for sharing and linking knowledge organization systems via the Web. This paper proposes an event ontology description...
An empty horn antenna is filled with a bulk anisotropic metamaterial to enhance its gain and aperture efficiency. Radiation patterns in both the E-plane and the H-plane are improved owing to the anisotropic permittivity and the anisotropic permeability. Aperture efficiency over 70% is achieved despite of its short longitudinal length . Insertion loss below 0.18 dB and energy reflection...
For purpose of solving the imperfect problems of SIFT method those lack of edge feature detect and low identification rate, the paper propose the integration of the SIFT and edge direction histogram method, and discusses how to use edge direction histogram on the basis of the SIFT feature vector matching to product edge direction difference values further more carry out the seal identification, by...
This paper presents a novel shape representation approach, Finite Element Skeleton (FES), based on studies of planar shape analysis from the perspective of Finite Element Method (FEM). First, we derive the shape contour of an object in image with edge detection approach. Then, the approach builds connections of all pixels on the shape contour with the inner center point of the shape, and models these...
Many countries, such as the US, China, and the UK, have considered using safe elevators (such as fire elevators) on safe floors (such as refuge floors) in high-rise buildings to speed up emergency evacuation. However, for safety reasons such as sheave traction and brake capability, elevators are designed not to operate when overloaded. Overcrowding, then, may actually slow down building evacuation...
The interaction of a light tungsten wire-array Z-pinch with an embedded heavy foam converter, which mass ratio is typically less than 0.16, is numerically analyzed and experimentally investigated on the 1.3MA “QiangGuang I” facility. Computational results show that this implosion process can be divided into three stages: acceleration of the tungsten wire-array plasma, collision, and stagnation. The...
Rainbow Table is one of the best known methods among all variants of Cryptanalytic time-memory trade-off (TMTO). Many improvements have been recommended since the Rainbow Table was proposed. In our work, we propose a new method to measure the degree of optimization technology. Under the method, we give out two optimization techniques based on the Rainbow Table. The first method is derived from the...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.