本文選題：項(xiàng)目管理　切入點(diǎn)：Huffman算法　出處：《浙江理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：智能化項(xiàng)目信息管理系統(tǒng)是科研活動中重要的一部分，不僅能夠提高工作效率，而且對于提高科研項(xiàng)目整體水平具有重要意義。項(xiàng)目管理系統(tǒng)中存在著數(shù)據(jù)傳輸效率低，數(shù)據(jù)容易被竊取以及服務(wù)程序?qū)θ蝿?wù)處理不及時(shí)的問題。本系統(tǒng)采用C/S架構(gòu)模式，主要分為客戶端、服務(wù)端和數(shù)據(jù)庫三部分，重點(diǎn)研究數(shù)據(jù)傳輸中的數(shù)據(jù)安全、傳輸效率以及多客戶端的并發(fā)訪問問題。本文主要研究工作如下： 1、針對網(wǎng)絡(luò)中的數(shù)據(jù)傳輸效率問題，對數(shù)據(jù)壓縮技術(shù)中的Huffman壓縮算法以及LZ77壓縮算法進(jìn)行原理分析及性能測試，指出了各自的優(yōu)缺點(diǎn)，對LZ77算法進(jìn)行改進(jìn)，在此基礎(chǔ)上，研究了Huffman和改進(jìn)LZ77混合壓縮算法。 2、針對數(shù)據(jù)傳輸中的安全問題，本文分別對非對稱加密算法中的RSA算法以及對稱加密算法中的DES和AES算法進(jìn)行了原理分析， DES算法和RSA算法在加密中性能有一定的互補(bǔ)，所以，本文研究采用DES和RSA混合加密方法。 3、針對系統(tǒng)在有大量客戶端訪問服務(wù)端的時(shí)候，會出現(xiàn)服務(wù)端處理客戶請求不及時(shí)的問題，本系統(tǒng)采用線程池解決并發(fā)訪問問題，對線程池的原理結(jié)構(gòu)及實(shí)現(xiàn)方法進(jìn)行分析，設(shè)計(jì)了適用于本系統(tǒng)的自適應(yīng)線程池。 4、利用winform框架和MySql數(shù)據(jù)庫搭建了項(xiàng)目管理系統(tǒng)平臺，本系統(tǒng)采用混合壓縮算法對數(shù)據(jù)進(jìn)行壓縮，采用混合加密算法對數(shù)據(jù)進(jìn)行加密，，采用線程池對客戶端的任務(wù)請求進(jìn)行處理。 系統(tǒng)的應(yīng)用結(jié)果表明，本文采用的混合壓縮算法、混合加密算法以及線程池等方法具有較好的魯棒性，基本能夠滿足科研活動中的項(xiàng)目信息管理需要，數(shù)據(jù)的傳輸速度快，安全性高，服務(wù)程序的處理能力較強(qiáng)，能夠解決傳統(tǒng)的人工信息記錄工作量大、效率低的問題，實(shí)現(xiàn)了智能化、高效率的信息管理。
[Abstract]:Intelligent project information management system is an important part of scientific research activities, which can not only improve the working efficiency, but also improve the overall level of scientific research projects. There is a low efficiency of data transmission in the project management system. The system adopts C / S architecture mode, which is mainly divided into three parts: client, server and database. It focuses on data security in data transmission. Transmission efficiency and multi-client concurrent access problem. The main work of this paper is as follows:. 1. Aiming at the problem of data transmission efficiency in network, this paper analyzes the principle and performance of Huffman compression algorithm and LZ77 compression algorithm in data compression technology, points out their advantages and disadvantages, and improves the LZ77 algorithm. The hybrid compression algorithm of Huffman and improved LZ77 is studied. 2. Aiming at the security problem in data transmission, this paper analyzes the principle of RSA algorithm in asymmetric encryption algorithm and DES and AES algorithm in symmetric encryption algorithm. The performance of DES algorithm and RSA algorithm in encryption is complementary to each other, so, In this paper, the mixed encryption method of DES and RSA is studied. 3. When the system has a large number of clients to access the server, the server will deal with the customer request not in time, this system uses thread pool to solve the concurrent access problem, and analyzes the principle structure and implementation method of the thread pool. An adaptive thread pool is designed for this system. 4. The project management system platform is built by using winform framework and MySql database. The system uses mixed compression algorithm to compress data, uses mixed encryption algorithm to encrypt data, and uses thread pool to process client task request. The application results of the system show that the hybrid compression algorithm, mixed encryption algorithm and thread pool are robust, which can basically meet the needs of project information management in scientific research activities, and the transmission speed of data is fast. It can solve the problems of large workload and low efficiency of traditional manual information recording and realize intelligent and efficient information management.
【學(xué)位授予單位】：浙江理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TP315

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 林鋒;黃可生;徐小杰;吳建培;;LZW壓縮算法在多通道高速數(shù)據(jù)采集系統(tǒng)中的實(shí)現(xiàn)[J];船舶工程;2011年S2期

2 徐曉華,熊劍,羅佳;利用Huffman算法對RINEX格式GPS觀測文件進(jìn)行壓縮[J];測繪信息與工程;2002年05期

3 朱翔;基于高效線程池的技術(shù)研究與設(shè)計(jì)[J];長沙鐵道學(xué)院學(xué)報(bào);2003年04期

4 周瑞;鮑文;于霄;賀惠新;劉金福;;基于提升小波和混合熵編碼的數(shù)據(jù)壓縮方法[J];電力系統(tǒng)自動化;2007年22期

5 蒙皓兵;路曉亞;;DES算法分析[J];計(jì)算機(jī)安全;2012年06期

6 劉錄松;;淺論基于RSA的加密算法[J];電腦知識與技術(shù);2012年21期

7 李紅艷;一種將AES和SSL結(jié)合的數(shù)據(jù)加密算法[J];河南師范大學(xué)學(xué)報(bào)(自然科學(xué)版);2005年01期

8 王忠效，姜丹;關(guān)于Lempel－Ziv　77壓縮算法及其實(shí)現(xiàn)的研究[J];計(jì)算機(jī)研究與發(fā)展;1996年05期

9 吳國清;陳虹;;一種科學(xué)數(shù)據(jù)無損壓縮方法[J];計(jì)算機(jī)工程與應(yīng)用;2006年05期

10 黃榮輝;周明天;曾家智;;動態(tài)哈夫曼算法在電力線計(jì)算機(jī)網(wǎng)絡(luò)數(shù)據(jù)壓縮中的應(yīng)用[J];計(jì)算機(jī)科學(xué);2000年11期

本文編號：1574626