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The problem of traffic congestion has become a major and costly problem in many cities. Modeling, simulation and estimation of urban traffic are necessary, particularly mathematic models. This paper propose a novel mathematic model based on CTM named Urban Cell Transmission Model (UCTM), which is a macroscopic model for simulating urban traffic. We use a fixed proportion of turn whenever vehicles...
This paper presents an improved method to automatically generate and score a new sentiment lexicon for Chinese sentiment analysis. Node represents word and weighed edge stands for the relationship between two words in a weight graph. The polarity detection is achieved through the label propagation in this weight graph. Moreover, the lexicon is expanded through some direct relations between the words...
In the relay-trading mode of wireless cognitive radio networks the secondary user (SU) can achieve a promised spectrum access opportunity by relaying for the primary user (PU). How to utilize the exchanged resource efficiently and fairly is an interesting and practical problem. In this paper we proposed a cooperative spectrum sharing strategy (RT-CSS) for the relay-trading mode from the fairness view...
This paper describes a new method for image edge enhancement and boundary segmentation. Like many interactive graph-based segmentation methods, users are asked to provide some foreground (or object) and background seeds. A set of randomly generated points representing the foreground are paired with another set of random points representing the background. The corresponding shortest paths of all such...
In this paper an object detection algorithm is proposed, which is robust in the presence of cast shadows and is based on geometric projections. The novelty of the work lies in the use of homology mapping of the foreground regions between different parallel planes within a monocular view, unlike some existing algorithms which depend on the use of multiple cameras. The results on an open video dataset...
An object detection algorithm which can remove moving cast shadows is presented. It is based on the homography mapping of foreground regions from multiple cameras. Not only the homography for the ground plane but also those for multiple parallel planes are employed. Unlike the existing geometric approaches, this algorithm removes cast shadows while keeping the feet of moving objects.
To increase the robustness of detection in intelligent video surveillance systems, homography has been widely used to fuse foreground regions projected from multiple camera views to a reference view. However, the intersections of non-corresponding foreground regions can cause phantoms. This paper proposes a colour statistical approach to cope with this problem. This method is based on the Mahalanobis...
Based on dichotomy, we depart from the heated debate on the relationship between organizational slacks and corporate financial performance, focus on the relationship between organizational slacks and corporate social performance. This article is both a qualitative and quantitative one. Applying resource based view, industrial organization theory, and institutional theories, based on the empirical...
Wind energy, solar energy have played increasingly important role in power system. Wind energy, solar energy have nature complementarities with regard to the time and the region with storage batteries, can be achieved to improve the output power curves and reduce adversely affect when renewable energy connect into the power grid. In this paper, three different operation control modes of hybrid wind/pv/storage...
Homography mapping and fusion of foreground regions from multiple camera views is an effective technique for moving object detection. However, the intersections of non-corresponding foreground regions frequently cause phantom detections. In this paper, an algorithm using colour template matching is proposed to identify such phantoms from the multiview foreground intersection. Experiments on real-world...
With respect to the conventional hydraulic broaching machine, the all-electric CNC broaching machine has many advantages. This paper combines the digital servo control system, the double ball screw and the linear motion rail to realize broaching for the two workpieces' internal threads of the different rotations and lead distances. The DSP-based full-AC drive control system was developed. The observer...
It is a common case that a one-way TCP data flow is set up between a client and a server when the client accesses the Internet through wireless mesh networks (WMNs). Since both IEEE 802.11 and TCP have acknowledgement (ACK) mechanisms for transmission reliability, the functional duplication results in overhead. In this paper, a cross-layer MAC protocol for one-way TCP data flow performance enhancement...
A 8.12mm2 0.1–4GHz receiver and 0.1∼6GHz transmitter with reconfigurable 10∼100MHz signal bandwidth in 65nm CMOS is presented. Rx features two single-ended LNAs in parallel, passive current down-conversion with 25% duty-cycle LOs, 5th/7th-order reconfigurable baseband filtering and IIP2/frequency tuning/IQ calibration. It achieves NF of 3∼8dB over 0.1–4GHz and 21mA current consumption for 2.3GHz LTE...
SQL-Injection is an attack for Web applications which are based on database system, and it is one of the most serious security threats for Web application. This paper proposes a new middle-ware-based prevention mechanism: SQLIMW. The SQLIMW avoids SQL-Injection attack from the programmer to the server, and use HASH function to replace encryption. Furthermore, it protects username, password and private...
Partitioning network, especially some DTN, can use Message Ferry(MF) scheme to restore network connection. Message TTL describes the maximum delay tolerance of transmission and messages with out-of-date TTL should be dropped. In this paper, we will study the problem of how to design the ferry's moving route dynamically to get high message delivery ratio under the constraint of message TTL, which we...
A novel H6-type inverter is proposed for the trade-off solution of common-mode current (leakage current) and conversion efficiency in transformerless photovoltaic (PV) grid-connected energy generation system. A direct power passing path is introduced into the H5 topology to ensure the current flows through less power switches than that in the H5 topology during the operational mode of direct power...
Product features extraction, as a subtask of the feature-level sentiment analysis, aims to discover features of products from text descriptions. In this paper, we propose a novel unsupervised approach together with some language rules to extract product features from Chinese customer reviews. The extraction system can automatically extract an initial seed list that serves as training data to get the...
The development and deployment of clean vehicles bring great potential of reducing transportation greenhouse gas (GHG) emission and dependency on fossil fuels. The net GHG reduction through clean vehicle systems is tightly linked to the electricity grid mix (for electrical cars and plugin hybrids) and fueling strategy (for cars using alternative fuels). Natural resources may also pose constraints...
The eutrophication of lake and followed cyanobacteria bloom are the most apparently eco-environmental problem in freshwater lakes in China. Lake Dianchi is the largest and the most serious eutrophic freshwater lake in southwest China that has experienced cyanobacterial blooms annually during the last few decades. The temporal distribution of phytoplankton biomass (estimated using chlorophyll-a concentration)...
This paper deals with the stationkeeping strategy for Halo orbit at the Libration Point L1 in the Sun-Earth/Moon system. To understand the stability of Halo orbit generating from Circular Restricted Three Body Problem (CR3BP), the Floquet Multiplier is calculated from the Poincaré Mapping defined by the selected nominal orbit. To ascertain the mis-modeled accelerations, the Spatial Bi-Circular Model...
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