共查询到20条相似文献,搜索用时 62 毫秒
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摩托罗拉近日在大陆推出第一款蓝牙耳机HS810,这是摩托罗拉公司目前在全球推出的最新款高端蓝牙耳机,同时摩托罗拉HS810是目前国内惟一拥有进网许可证的蓝牙通讯产品,它同时适用于现有的索尼爱立信、诺基亚等支持蓝牙技术的手机。 相似文献
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经过蓝牙技术的不断发展,米饭们对蓝牙耳机的需求也越来越高。不过,传统耳机厂商大部停留在有线耳机世界里,未在无线市场推出重量级产品。这也催生了众多的新生品牌,WOOWI和赛尔贝尔正是其中的代表。那么,这些新生产品又是否足够优秀,值得购买? 相似文献
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蓝牙耳机对于手机用户来说并不是什么新鲜的东西,但是使用蓝牙耳机的用户却是少数,这有很多原因。一方面.因为很多手机并不支持蓝牙功能,不过这一问题现在的影响已经越来越小了,因为支持蓝牙功能的手机越来越多,价位也越来越低.而且支持蓝牙功能的手机可能不支持通过蓝牙无线连接传输文件,但是一定支持蓝牙耳机。另一方面,蓝牙耳机的价格较贵,有的蓝牙耳机甚至比手机的价格还贵。这让很多用户难以接受。这一次MOTO同时推出了两款蓝牙耳机.H680和H375。H680针对高端市场。而H375则是一款价格较低.使用方便的产品,价格在300元左右,已经在很多用户可以接受的范围。还有。很多用户使用蓝牙耳机之后感觉不够舒适,长期佩戴会让耳朵出现疼痛感。MoTOH375使用的TrueComfort专利设计正是解决这个问题的。[编者按] 相似文献
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据统计,蓝牙技术有50%用于手机的内嵌及捆绑,有30%用于蓝牙耳机,总共有80%的蓝牙产品与手机相关,可以说,蓝牙与手机已是一对密不可分的“情人”(参见谭贻国先生《蓝牙是手机的情人》一文),那么,当蓝牙与手机这对情人相遇,又会碰撞出怎样的激情火花?在中国最大的蓝牙产业基地深圳, 相似文献
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The authors describe the development trends and results of millimeter-wave systems in Japan in such fields as communication, radar, and measurement systems. The applications included are the W-40G waveguide transmission communication system, an automobile traffic control system using the 60-GHz band, a collision avoidance radar system for an automobile, a plasma electron density measuring system, and satellite communication. The authors describe the development of devices such as high-power FET amplifiers, traveling wave tube amplifiers (TWTAs), IMPATT amplifiers, low-noise amplifiers, and monolithic microwave integrated circuit (MMIC) devices used in constructing the millimeter-wave systems 相似文献
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《Electron Devices, IEEE Transactions on》1972,19(4):524-531
A review is given of the progress in electrophotographic science and technology in Western Europe during the years 1967 to early 1971. University research work is mainly directed towards two areas: 1) the electrical and physical properties of photoconductors, such as selenium, chalcogenides, oxides, and organic materials; and 2) the sensitization of these photoconductors. Industrial research teams report on the preparation of electrophotographic layers on development and on image evaluation. A bibliography including scientific papers and patents published on this subject during said period completes this review. 相似文献
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Experiments have been performed to investigate whether switching phenomena are observable in ion-irradiated GaAs. It is found that the V/I characteristics of H2+-and N+-irradiated layers show both negative resistance and switching from a high resistance to a low resistance state. Ion irradiation may thus be a useful method of fabricating switching devices. 相似文献
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Before the establishment of the People's Republic, China was a semi-colonial, semi-feudal society plagued by foreign interventions and internal power struggles. It was against this background that the electrical industry went through its infancy. Today, the People's Republic of China is facing an acute energy shortage, posing a problem which must be quickly overcome if the country's rapid industrialisation is to continue as planned. The author presents a brief history of power generation in China from 1949 to 1983 and examines possibilities for the future 相似文献
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Ghana has recognized the need for efficient and reliable telecommunication services. The widespread availability of these services will promote the nation's economic advancement and the decentralization of the government's activities. To achieve the objective of bringing telecommunications to all the people of Ghana, private sector participation is considered essential as a source of management skills, technology, and financing that will be required for the provision of services. In order to attract such participation, Ghana is putting in place the necessary policy, institutional, and regulatory frameworks to create an enabling environment for private sector investment in the telecommunication sector 相似文献
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游小明 《信息安全与通信保密》2003,(5):16-17
信息安全在IT业中的角色演变 在当今信息时代,信息技术日新月异,信息产业已经成为拉动GDP增长的第一支柱产业,并以每年20%—30%的速度迅猛发展。其发展过程也经历了从传统IT向新型IT的转变,其中一个重要的转变因素便是信息安全。 1.传统IT与信息安全的关系。传统IT涵盖了五大类:通信、网络、计算机、软件、电子材料及元器件。这五类IT行业本身的发展一度呈现结构失衡:一方面过度投资到“信息高速公 相似文献
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中国带电清洗技术的突破 总被引:2,自引:0,他引:2
一、电路故障的成因 通常,由于空气的污染和设备所处的环境及管理条件不同,空气中的灰尘、油污、酸碱及其气体、盐分、潮气、炭渍、金属尘埃、各种机械杂质等污染物质,不可避免地吸附在电路表面及其它部位,加之静电累积和在电场力的作用下,污秽的累积不断加重和变得牢固,各种污秽牢牢附着在线路表面,深层及各部位。灰尘、油污、酸碱及其气体、盐分、潮气、炭渍、金属尘埃、各种 相似文献