首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 296 毫秒
1.
口腔齿科手机是HBV、HCV、HIV等血液传播性疾病和消化道传染病的传播媒介。采用激光泵浦光源在辐射过程中产生的瞬间高温、丰富的光谱分布的强光作为载体,对齿科手机进行快速、彻底、无损伤的消毒灭菌。  相似文献   

2.
中国较早的一家外资牙科连锁诊所——瑞尔齿科(Arrail Dental)的创始人和总裁。在中美天津史克制药有限公司任职八年之后,邹萁芳于1992年申请赴美国沃顿商学院学习,之后回国创办了他的企业。瑞尔齿科创立于1999年,目前已经是一家颇具声誉的高档牙科服务机构,在北京、上海及深圳设有十家诊所,公司拥有100名牙科医生,为日益富裕的国内中产阶级提供服务。  相似文献   

3.
邹箕芳(Robert Zou): 中国第一家外资牙科连锁诊所——瑞尔齿科(Arrail Denta)的创始人和总裁。在中美天津史克制药有限公司任职八年之后,邹其芳于1992年申习,之后回国创办了他的企业。瑞尔齿科创立于1999年。目前已经是一家颇具声誉的高档牙科服务机构,在北京、上海及深圳设有十家诊所。公司拥有100名牙科医生,为日益富裕的国内中产阶级提供服务。  相似文献   

4.
"集中采购、统一销售、话费补贴……"这是用户对于运营商销售手机的既有印象.即日起,在手机领域从购机到使用、再到维修和咨询,江苏移动为用户想得更远、做得更多.2013年3月,江苏移动在南京举行"开启手机4S服务新时代"主题新闻通气会,力推集"买手机、玩手机、修手机、询手机"为一体的手机4S服务新模式,一站式满足用户多样化通信服务需求,全面开启手机服务新时代.而江苏移动也成为中国移动集团旗下首家推出手机4S服务新模式的省级公司.  相似文献   

5.
李敏 《电子测试》2006,(5):37-47
上个世纪手机的用途还停留在通话功能上,进入二十一世纪,不仅手机的体型从原本可以用来防身的"大哥大"急速瘦身到可悬挂在时尚女性的脖颈上,短信、彩屏、和弦、拍照等手机新卖点也层出不穷.在拍照手机流行过后,众手机开发商又萌生将电视拉来为手机的新一波增长摇旗呐喊.然而,与之前手机所增加的功能相比,手机融合电视的难度系数上升了N个台阶.  相似文献   

6.
对于各大手机厂商来说,追求永无止境.伴随着娱乐化、商务化手机的不断创新,融合已经成为手机产业发展的主旋律,不论是模块的融合还是功能的融合.于是,多模块集成的单芯片手机、功能丰富的多媒体手机纷纷问世,创造着手机"小而全"的时代.但是,就单芯片手机而言,不论是它的定义,还是市场前景,争议都颇多……带着疑问,我们采访了美国博通公司大中国区总经理梁宜先生.  相似文献   

7.
随着彩信手机、拍照手机、智能手机等手机的发展,手机已不再简单地只是打电话发短信的一个工具,而渐渐成为集个性化、娱乐化为一体的数据中心.如何满足用户在获取图像后对图像进行个性化处理的需求,就变得十分重要.因此,手机图像处理已然成为手机技术发展的研究热点.针对手机图像处理领域的专利文献,给出了该领域主要申请人的申请量分布图,并对该领域的重要专利分布进行分析.  相似文献   

8.
上个世纪手机的用途还停留在通话功能上,进入二十一世纪,不仅手机的体型从原本可以用来防身的"大哥大"急速瘦身到可悬挂在时尚女性的脖颈上,短信、彩屏、和弦、拍照等手机新卖点也层出不穷.在拍照手机流行过后,众手机开发商又萌生将电视拉来为手机的新一波增长摇旗呐喊.然而,与之前手机所增加的功能相比,手机融合电视的难度系数上升了N个台阶.  相似文献   

9.
闫子波  魏鸣 《电子设计技术》2007,14(11):98-98,100,108
手机日益普及,已成为生活中不可缺少的通讯工具.而且手机的功能已不仅仅限于通话,手机早已成为时尚潮流的标志和音频视频娱乐的一个载体,MP3、FM收音机、手机电视、数码拍照等等都逐渐成为中高端手机必不可少的功能.  相似文献   

10.
手机病毒与移动通信安全   总被引:1,自引:0,他引:1  
孙天伟 《信息通信》2007,20(6):47-49
目前手机在日常生活中使用得越来越广泛.尤其是随着移动通信技术向3G/B3G的迅猛演进,手机的功能也越来越强大.但是与此同时,手机病毒也已经开始对移动通信系统构成严峻威胁.本文阐述了手机病毒原理、攻击方式、主要类型以及手机病毒的预防措施等几个方面的问题.同时针对手机病毒所带来的威胁,对整个移动通信安全机制的改进和完善提出了建议.  相似文献   

11.
DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.  相似文献   

12.
From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.  相似文献   

13.
The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.  相似文献   

14.
The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.  相似文献   

15.
Today, micro-system technology and the development of new MEMS (Micro-Electro-Mechanical Systems) are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.  相似文献   

16.
Waveguide multilayer optical card (WMOC) is a novel storage device of three-dimensional optical information. An advanced readout system fitting for the WMOC is introduced in this paper. The hardware mainly consists of the light source for reading, WMOC, motorized stages addressing unit, microscope imaging unit, CCD detecting unit and PC controlling & processing unit. The movement of the precision motorized stage is controlled by the computer through Visual Basic (VB) language in software. A control panel is also designed to get the layer address and the page address through which the position of the motorized stages can be changed. The WMOC readout system is easy to manage and the readout result is directly displayed on computer monitor.  相似文献   

17.
This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel's.  相似文献   

18.
It is a key problem to accurately calculate beam spots' center of measuring the warp by using a collimated laser. A new method, named double geometrical center method (DGCM), is put forward for the first time. In this method, a plane wave perpendicularly irradiates an aperture stop, and a charge couple device (CCD) is employed to receive the diffraction-beam spots, then the geometrical centers of the fast and the second diffraction-beam spots are calculated respectively, and their mean value is regarded as the center of datum beam. In face of such adverse instances as laser intension distributing defectively, part of the image being saturated, this method can still work well. What's more, this method can detect whether an unacceptable error exits in the courses of image receiving, processing and calculating. The experimental results indicate the precision of this method is high.  相似文献   

19.
The collinearly phase-matching condition of terahertz-wave generation via difference frequency mixed in GaAs and InP is theoretically studied. In collinear phase-matching, the optimum phase-matching wave hands of these two crystals are calculated. The optimum phase-matching wave bands in GaAs and lnP are 0.95-1.38μm and 0.7-0.96μm respectively. The influence of the wavelength choice of the pump wave on the coherent length in THz-wave tuning is also discussed. The influence of the temperature alteration on the phase-matching and the temperature tuning properties in GaAs crystal are calculated and analyzed. It can serve for the following experiments as a theoretical evidence and a reference as well.  相似文献   

20.
Composition dependence of bulk and surface phonon-polaritons in ternary mixed crystals are studied in the framework of the modified random-element-isodisplacement model and the Bom-Huang approximation. The numerical results for Several Ⅱ - Ⅵ and Ⅲ- Ⅴ compound systems are performed, and the polariton frequencies as functions of the compositions for ternary mixed crystals AlxGa1-xAs, GaPxAS1-x, ZnSxSe1-x, GaAsxSb1-x, GaxIn1-xP, and ZnxCd1-xS as examples are given and discussed. The results show that the dependence of the energies of two branches of bulk phonon-polaritons which have phonon-like characteristics, and surface phonon-polaritons on the compositions of ternary mixed crystals are nonlinear and different from those of the corresponding binary systems.  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号