摘要：The design and fabrication processes of a novel scanner with minimized coupling motions for a high-speed atomic force microscope （AFM） were addressed. An appropriate design modification was proposed through the analyses of the dynamic characteristics of existing linear motion stages using a dynamic analysis program, Recurdyn. Because the scanning speed of each direction may differ, the linear motion stage for a high-speed scanner was designed to have different resonance frequencies for the modes, with one dominant displacement in the desired directions. This objective was achieved by using one-direction flexure mechanisms for each direction and mounting one stage for fast motion on the other stage for slow motion. This unsymmetrical configuration separated the frequencies of two vibration modes with one dominant displacement in each desired direction, and hence suppressed the coupling between motions in two directions. A pair of actuators was used for each axis to decrease the crosstalk between the two motions and give a sufficient force to actuate the slow motion stage, which carried the fast motion stage, A lossy material, such as grease, was inserted into the flexure hinge to suppress vibration problems that occurred when using an input triangular waveforrn. With these design modifications and the vibration suppression method, a novel scanner with a scanning speed greater than 20 Hz is achieved.

摘要：网络扫描器在信息安全领域有着重要的作用和地位,该文提出用一种专用的网络扫描脚本语言对安全检查项进行描述的想法,并有选择地给出了这种脚本语言的设计思想和实现。

摘要：介绍了在Java语言中利用scanner类从键盘输入数据、System输出数据的方法,通过两个应用实例设计实现了从键盘输入数据、从控制台输出数据。

摘要：本文以韩国东部海岸沙滩的防护物理模型为依托,利用3Dscanner获取实验地形的三维数据,采用降维数字去燥法和高精度地形演变分析法,快速、准确地对实验地形的三维数据进行去噪、数据网格化以及试验前后高程数据差值,得到整体区域的淤积和冲刷情况。

摘要：斯伦贝谢公司2006年新推出了核磁共振测井仪器MR scanner,该仪器采用偏心梯度设计,具有提供多种探测深度、测量结果不受井眼条件的影响、能进行流体表征等特点。在低阻、低对比度储层的评价中具有较大优势。文章对MR scanner仪器的结构、特点、规格及技术指标进行了介绍,列举了其优点以及应用效果。

摘要：为及时向广大电子和电脑用户介绍国外的新技术产品,使用户不仅了解信息,还能直接掌握这些产品的性能和操作,本刊特辟“今日电子展示窗”,展示产品的广告页都标明“今日电子展示产品”。感兴趣的读友可与本刊编辑部联系。

摘要：医院里的CT扫描仪会让你感到恐惧吗？那是因为你小时候没有玩过这个东西——飞利浦专为孩子们设计的扫描仪器，孩子们可以在玩“医生病人”游戏的时候．把他们的小布偶放到上面进行检查，飞利浦把冰冷的医疗器具变成可爱的课堂辅导教具，让孩子们尽情游戏其中。从小对医疗器械有了深入的了解，长大后就不怕去医院喽！这款产品在2009年获得红点设计奖。

摘要：To the Editor:Coronary computed tomographic angiography(CCTA)has been considered as one of the most important noninvasive imaging modalities in diagnosing coronary artery disease(CAD).[1]Modern scanner of CCTA can provide precise coronary atherosclerotic plaque information,showing improved diagnostic accuracy and sensitivity for identifying obstructive CAD with a preferable temporal and spatial *** studies have demonstrated the prognosis value of CCTA for the prediction of future adverse CAD events.

摘要：A novel constant force feedback mechanism based on fuzzy logic for tapping mode Atomic Force Microscopes (AFM) is proposed in this paper. A mathematical model for characterizing the cantilever-sample interaction subsystem which is nonlinear and contains large uncertainty is first developed. Then, a PID-like fuzzy controller, combing a PD-like fuzzy controller and a PI controller, is designed to regulate the controller efforts and schedule the applied voltage of the Z-axis of the piezoelectric tube scanner to maintain a constant tip-sample interaction force during sample-scanning. Using the PID-like fuzzy controller allows the cantilever tip to track sample surface rapidly and accurately even though the topography of the surface is arbitrary and not given in advance. This rapid tracking response facilitates us to observe samples with high aspect ratio micro structures accurately and quickly. Besides, the overshoot which will result in tip crash in commercial AFMs with a traditional PID controller could be avoided. Additionally, the controller efforts can be intelligently scheduled by using the fuzzy logic. Thus, continuous manual gain-tuning by trial and error such as those in commercial AFMs is alleviated. In final, computer simulations and experimental verifications are provided to demonstrate the effectiveness and confirm the validity of the proposed controller.

摘要：The article is to study the development of computer-aided design of X-ray microtomography—the device for investigating the structure and construction of three-dimensional images of organic and inorganic objects on the basis of shadow projections. This article provides basic information regarding CAD of X-ray microtomography and a scheme consisting of three levels. The article also shows basic relations of X-ray computed tomography, the generalized scheme of an X-ray microtomographic scanner. The methods of X-ray imaging of the spatial microstructure and morphometry of materials are described. The main characteristics of an X-ray microtomographic scanner, the X-ray source, X-ray optical elements and mechanical components of the positioning system are shown. The block scheme and software functional scheme for intelligent neural network system of analysis of the internal microstructure of objects are presented. The method of choice of design parameters of CAD of X-ray microtomography aims at improving the quality of design and reducing costs of it. It is supposed to reduce the design time and eliminate the growing number of engineers involved in development and construction of X-ray microtomographic scanners.