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1.
《今日电子》2004,(10):130-130
安捷伦的系统就绪测试可帮助工程师开发测试系统,而不需要对他们的硬件系统作大量改变。系统就绪测试能使工程师容易地把他们的仪器连接到计算机或网络,并在所熟悉的软件环境中很快开始使用他们的仪器。近期,安捷伦新推出一系列系统就绪(SystemReady)测试仪器,以帮助工程师加速测试系统的开发。  相似文献   

2.
近日.中共通讯(ZTE)选用思博伦通信的Landslide CDMA2000测试系统开发其先进的下一代无线分组数据服务节点(PDSN)平台,该平台能够帮助ZTE在部署PDSN产品前.确定和解决在网络开发过程中可能出现的问题、该系统提供全面、灵活的测试套件.能够仿真各种真实的网络应用,包括无线网络应用的多种组合、客户漫游行为、用户连接与断开行为以及高峰时间负载。  相似文献   

3.
一致性测试     
《电子质量》2008,(3):34
一致性测试是业内对WCDMA移动终端在商用之前的一个非常重要的测试,也是运营商、手机厂家等非常关注的一项测试。各种移动通讯协议标准(例如GSM,W-CDMA)都明确定义了在各种想象得到的状态下手机和网络的行为和反应,一致性测试检查手机的行为是否和协议标准规定的一致,运营商和设备厂家也可以信赖通过一致性测试的手机。  相似文献   

4.
对等离子体增强化学汽相起积(PECVD)法制成SiOxNy薄膜组成的MIS结构样品,由集成测试系统测量Ⅰ-Ⅴ特性,用晶体管特性图示仪测试击穿行为。分析研究了该薄膜的Ⅰ-Ⅴ特性和击穿机理,探讨了膜的击穿电场及其随混合气体比例、反应空气压、衬底工作温度的变化关系。  相似文献   

5.
目前各种心理测试系统被广泛应用,但基于单一常模的测试方法有时会导致测试结果的严重失真。故此提出了基于常模修正的测试方法,并根据此方法搭建基于常模修正的心理测试系统,旨在解决现行心理测试方法中由于常模不匹配而造成的测试结果不准确的问题。测试实例中将基于常模修正方法的测试结果与基于单一“中国常模”方法的测试结果进行分析比对,结果表明使用新方法明显改善了由于“中国常模”老化或常模不匹配而导致的测试结果失真的尴尬局面。  相似文献   

6.
飞行疲劳是导致飞行作业能力下降的一个重要因素,研究表明航空飞行事故中约有75%与人的失误有关。飞行疲劳的预防、监控和检测是当前航空航天医学研究的重要课题之一。在分析国内外飞行疲劳检测的研究现状和视觉神经行为功能测试原理的基础上,从飞行员的视觉认知功能层面入手,综合视觉心理物理学、光度学和固体光电子学等学科知识,融合了临界闪光融合频率和视觉反应时这两项国际公认的神经行为功能指标,设计了飞行员视觉神经行为功能测试系统,可以有效地测试视觉神经行为功能指标,为进一步对飞行人员的飞行基本能力进行动态监控,保障飞行安全打下重要基础。  相似文献   

7.
对视觉信息认知过程的探讨,可以帮助设计师理解用户的心理认知与行为规律,从而改进界面。通过提出视觉信息认知流程的四个阶段,分析并揭示用户在数字界面视觉信息界面任务时的认知特性及认知问题,为界面设计提供认知依据。  相似文献   

8.
对等离子体增强化学汽相淀积法制成SiOxNy,薄膜组成的MIS结构样品,由集成测试系统测量I-V特性,用晶体管特性图示仪测试击穿行为。分析研究了该薄膜的I-V特性的击穿机理。探讨了膜的击穿电场及其随混合气体比例,反应室气压,衬底工作温度的变化关系。  相似文献   

9.
1骨癌病人的心理反应特征分析1.1疑癌心理疑癌心理常出现在确诊之前,病人的反应非常突出,精神往往高度集中,过份注意自身感觉的每一细微变化,怀疑自己的病可能是癌,但又希望否定癌症的诊断,以逃避死亡的威胁。对医护人员的言语和行为十分敏感,心情紧张,甚至坐卧不宁。1.2恐惧心  相似文献   

10.
基于外周心理生物指标的GKT测试技术,在实验室和实测研究的基础上,总结和推导出一些一般意义上的原则,但对于这些原则在原则之外的情况的变化却鲜有系统的阐述。故而在此,将从测试的基本属性上,从心理测试理论和应用实践上论证这些一般意义上适用的原则在原则之外的可变性,为心理测试实践提供参考。  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 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   

14.
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   

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.
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   

17.
A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.  相似文献   

18.
A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.  相似文献   

19.
It is well known that adding more antennas at the transmitter or at the receiver may offer larger channel capacity in the multiple-input multiple-output(MIMO) communication systems. In this letter, a simple proof is presented for the fact that the channel capacity increases with an increase in the number of receiving antennas. The proof is based on the famous capacity formula of Foschini and Gans with matrix theory.  相似文献   

20.
Call for Papers     
正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks  相似文献   

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