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Apr 12, 2018Open    AccessArticle

Analysis and Reflection on the Utilization of Foreign Academic E-Book—An Empirical Study Based on 367 Users of a University

Chen Chen
Based on the form of questionnaire, this paper explores the use of foreign academic e-books by teachers and students in a certain school from a subjective view. 367 Users’ behavior, habits and needs were analyzed. Based on the results of the analysis, four suggestions are put forward to improve the overall utilization: Promote the localization of interface, pay attention to users’ advice while

Aug 07, 2017Open    AccessArticle

Three Types of Episodic Associations for the Semantic/Syntactic/Episodic Model of Language Prospective in Applications to the Statistical Translation

Zi-Jian Cai
Recently, it was proposed by Cai a new semantic/ syntactic/ episodic model of language encompassing the sentential meanings, while deriving three corresponding principles from it for machine translation, respectively as first to establish the dictionary of words/phrases, second to translate the grammar, and third to determine the meanings of some words/phrases of multiple meanings by statistic

Jun 29, 2017Open    AccessArticle

New Transmission Scheme Based on Space-Time Code for Massive MIMO

Xinji Tian, Wenjie Jia, Haotian Zhang
New transmission scheme based on space-time code is proposed for massive MIMO system, which consists of K users and a base station. Each user is equipped with four antennas and two of them are selected to send space-time codeword with Alamouti coded by using the method of generalized spatial modulation. The base station estimates the index of transmit antennas u

May 04, 2017Open    AccessArticle

Interference Cancellation Method without Feedback Amount for Three Users Interference Channel

Xinji Tian, Haotian Zhang, Wenjie Jia
In this paper, we investigate how to cancel multi-user interference without feedback amount over multiple-input multiple-output (MIMO) interference channel using space-time code. Three transmitter-receiver pairs are considered and each node is equipped with four antennas. Space-time codeword with dimension 4 × 4 is designed for three transmitters, respectively. The number of interfering codeword is reduced through the de

Oct 09, 2015Open    AccessArticle

An Advanced Approach of Local Counter Synchronization to Timestamp Ordering Algorithm in Distributed Concurrency Control

Loc Nguyen
Concurrency control is the problem that database management system (DBMS) meets with difficulties, especially distributed DBMS. There are two main methods of concurrency control such as locking-based and timestamp-based. Each method gets involved in its own disadvantages, but locking-based approach is often realized in most distributed DBMS because its feasibility and strictness lessen danger in distributed environment. Otherwise, timestamp ordering algorithm is merely implemented in central DBM...

Oct 09, 2014Open    AccessArticle

Particle Swarm Optimization (PSO) Performance in Solving the Train Location Problem at Transshipment Yard

Alhossein Mohamed, Qiyuan Peng
Particle swarm optimization (PSO) is an evolutionary computation technique; it has shown its effectiveness as an efficient, fast and simple method of optimization. In this paper, the mathematical model represents NP-hard in the strong sense; since any instance of the quadratic assignment problem (QAP), I will implement the particle swarm optimization (PSO) for the quadratic assignment problem (QAP). The results show that the PSO is an appropriate optimization tool for use in determining the trai...

Sep 25, 2014Open    AccessArticle

Low-Complexity LDPC-Coded USTM Noncohereny MIMO Receivers

Li Peng, Lingling Yang
This paper proposes a scheme of combining low-density parity check (LDPC) code with unitary space time modulation (USTM) for noncoherent multiple-input-multiple-output (MIMO) transmitter and receiver over Rayleigh block fading and additive white Gaussian noise (AWGN) channel. The main aim is to design the low complexity coded noncoherent MIMO receiver which is completely dependent on the structural feature of unitary space-time matrix without sending the pilot symbol at the transmitter and estim...