The Application of Digital Set Top Box

广播电视正全面从模拟转向数字，普及速度非常快。数字电视接收机作为过度产品将进入千家万户。论文是本人近两年工作的总结，论文阐述了数字电视的发展过程和数字电视机顶盒的发展现状，对数字电视系统进行简单介绍的基础上，总结了数字电视的发展趋势，分析了现有系统中各种调制技术的区别。重点介绍本人设计基于DVB系统的数字电视接收机（STB）的硬件开发平台。本论文针对DVB系统的数字电视接收机产品开发进行研究。研究和完成的主要工作:1.数字电视接收机的电路组成、工作原理以及相关的数字电视标准的研究；2.本方案的主芯片性能特点的研究，以及对本方案系统需要实现的功能的确定和系统设计的总体框图及各个模块的规划；3.介...As broadcast TV is transitting from analog to digital in a high spread speed, a transitional product, the digital television receiver will access thousands of households. This thesis is a summary for my late two-year work experience, which expatiates on the development process of digital TV and the development actuality of digital Set Top Box. Base on the easy instruction of digital TV system, the...学位：工程硕士院系专业：信息科学与技术学院电子工程系_仪器仪表工程学号：X20032901

临床药师参与一例误诊为亚甲炎的急性甲状腺炎病人治疗的实践与体会

急性甲状腺炎又称急性化脓性甲状腺炎（acute suppurative thyroiditis,AST）或甲状腺脓肿,是一种十分罕见的疾病,仅占甲状腺疾病的0.1%0.7%[1]。AST是细菌或真菌经由血液、淋巴管或邻近化脓灶侵犯甲状腺组织引起的急性化脓性炎症,病人多表现为单侧甲状腺肿痛,吞咽时疼痛加剧,向齿部、两颊、耳后或枕部放射,局部肿胀导致颈部被动后伸,可有邻近组织感染征象。AST早期脓肿未形成

Concept of and Technological Assessment Necessity for "Efficiency Accounting"

Traditional accounting is found to be incapable to depict the power of enterprise. This study proposed a new concept of "efficiency accounting". The concept of "efficiency accounting" was constructed under the easeful considerations of the following aspects of accounting and their significant interactions : financial ratio, financial accounting principles, depreciation, acquisition cost, current price valuation and price fluctuation. It was found for the new accounting to be effective that technological assessment of enter prise products is also inportant

Isolation and Characterization of a H2 -producing Strain Enterbacter sakazakii HP

通讯作者 Tel 0592-2185731, E-mail： longmn@ xmu.edu.cn[中文文摘]在自然环境中分离到一株具有高产氢活性的微生物菌株,经细菌鉴定仪及16S rRNA基因序列分析,鉴定该菌株为Enterbacter sakazakii HP。分析了起始pH值、反应温度、碳源、起始糖浓度、起始氧浓度及菌体密度等因素对菌株产氢活性的影响。研究表明,该菌株发酵产氢较适合的条件为:以葡萄糖为产氢底物,起始pH值8.0,菌体密度OD600=0.7,反应温度35℃,糖浓度为0.1mol/L,氧浓度为0%的条件下,此时产氢菌株的最高产氢活性为5.34μmolH2/h.mgdw,氢的得率为1.94molH2/mol葡萄糖。[英文文摘]A H2 -producing bacterial strain was newly isolated and identified as Enterbacte sakazakii HP by 16S rDNA sequence analysis and detection by BBLCRYSTAL AUTOREADER.Various factors,including substrates and its concentration,initial pH,temperature and oxygen,on the hydrogen production of E.sakazakii HP have been studied extensively.Among several sugars,glucose was the favorite substrate for hydrogen production.The optimum condition for hydrogen production by Enterbacte sakazakii HP was achieved as:initial pH8.0,cell density OD600 =0.7,temperature 35℃,glucose concentration 0.1 mol/L,oxygen concentration 0%.Under batch fermentative hydrogen production conditions,the maximal hydrogen production activity and hydrogen yield were obtained as 5.34μmol H2 /h·mg dw and 1.94mol H2 /mol glucose,respectively.The research results suggest that Enterbacter sakazakii HP is an ideal candidater for biological hydrogen production.国家自然科学基金项目(No30470395);厦门市科技项目(No3502Z20041070);厦门大学新世纪优秀人才计划项目;福建省青年科技人才创新项目(No2005J003