Using GSM Mobile Telephone Module to Design Wireless Desktop Telephone——Software Part

近年来，移动通信在全球范围内得到了飞速的发展，GSM移动终端作为GSM网内与人关系最密切的部分正在进行着爆炸性的增长。现在的手机具有的符合人们各种日常需要的功能使它越来越成为人们生活中不可缺少的一部分。手机的各种功能是在硬件和网络支持下由手机模块软件来实现的，手机体现出来的各种五花八门的功能和界面是由手机模块软件中与人关系最近的人机界面（MMI）以及底层驱动软件来完成。因而用手机模块实现无线桌面机的设计中，手机模块软件中的MMI软件及底层驱动软件的设计就成为实现无线桌面机功能的关键。论文的重点是用手机模块的MMI软件及底层软件来实现无线桌面机的设计。论文首先介绍无线桌面机的硬件核心－手机模块的...In recent years，when mobile communication is developing at fast speed in the global space，GSM mobile terminal which is regarded as the consanguineous part of GSM net and human is increasing at a burst of speed. Now because it have the ability of suiting for people’s everyday requirements，mobile telephone gradually becomes a indispensable part of human life. Mobile telephone’s various function is ...学位：工程硕士院系专业：计算机与信息工程学院_通信与信息系统学号：20023001

Implementing Acoustic Echo Cancellation Simulation of Wireless Desktop-telephone Using BLMS Algorithms on the DSK6711 Board

在很多通信情况下会产生回音,他会严重影响语音的清晰度,一旦回音比较严重时会使得整个系统无法工作,因此需要消除回音。本文要解决的是:当使用无线桌面机通信且按下免提键时,声音会在室内反射然后经过话筒返回而产生回音。现在大部分采用自适应滤波算法来消除回声,多采用L MS算法,由于BL MS算法与L MS算法的效果相同,但BL MS算法的运算量远小于L MS算法,本文采用BL MS算法在DSK6 711板上进行了这种回音抵消的仿真。Because echo which exist in many communication circumstance can badly influence audio definition, once the serious echo affect normal work of whole system, it is nessary to cancel audio echo.There are some questions should be solved in this paper.When we use desktop telephone (which is developed by our teacher ) to communicae and press handfree key, it can generate echo which is reflected by room and then come back through microphone. Now we prefer to using auto adaptive filter algorithm to cancel echo, for example, LMS algorithm. Because of BLMS algorithm and LMS algorithm have the same effect, but BLMS algorithm′s operation capacity is much less than LMS algorithm′s. This paper emulates acoustic echo cancellation using BLMS algorithms on DSK6711 board

75MeV/u￣(12)C离子Bragg曲线及黑色素瘤细胞失活的测量

用双电离室法测定了ＨＩＲＦＬ提供的７５ＭｅＶ／ｕ１２Ｃ离子经不同厚度降能片后的相对剂量，将降能片厚度等效为组织等效材料一水中的深度，得到了碳离子在水介质中的Ｂｒａｇｇ曲线，与计算的Ｂｒａｇｇ曲线进行了比较。同时测定了离子经不同厚度降能片后对黑色素瘤（Ｂ１６）细胞的失活效应，得到了离子束在不同贯穿深度上的Ｂ１６细胞存活数据。Relative doses of 75MeV/u 12C ion beam after passing through different thickness of degraders were measured with the double ionization chamber method. The degrader s thickness as then equalized to penetration depth of the beam in water and its Bragg curve was obtained. The measured Bragg curve is compared with that calculated based on a model set up by the authors. Meanwhile, the inactivation effect of the ion beam passing through different thickness of degraders on melanoma (B16)cells was measured, and the...国家科委攀登计划（B）项

碳离子诱导的DNA双链断裂

ＤＮＡ双链断裂（ＤＳＢｓ）是电离辐射诱导的最重要的原发损伤，研究ＤＳＢｓ有利于揭示细胞辐射敏感性的机理。用倒转脉冲场凝胶电泳结合荧光扫描进行ＤＮＡ定量研究７５ＭｅＶ／ｕ１２Ｃ６＋对小鼠Ｂ１６黑色素瘤细胞ＤＳＢｓ的诱导，结果表明：ＤＳＢｓ产额约为０．７４ＤＳＢｓ／１００Ｍｂｐ／Ｇｙ；ＤＮＡ片段分布在两个区域。大片段区分子量约为１．４Ｍｂｐ～３．２Ｍｂｐ，分子量小于１．２Ｍｂｐ的为小片段区；并且随着剂量的增加，大片段区ＤＮＡ含量逐渐下降，而小片段区的ＤＮＡ含量显著增加。表明Ｂ１６ＤＮＡ分子上可能存在对重离子较为敏感的位点。攀登计划（B）”项目,中国科学院兰州分院基