There are several ways to kill the bacterium and treat the wound by use of silver material. The silver material
also is a kind of sedative to keep people calm, especially for children. Because the bacterium resistance to the action of
drug, the medical application of silver material should be paid attention to.
This paper present a further development of electric field sensor and pressure sensor. They use new liquid crystal droplet materials. We discuss some of the features of devices formed from these materials. First of all, this material is a flexible plastic sheet, which can be readily polymerized to any thickness, size, or form. Devices formed from this material do not require sealing and can be fabricated as large, flexible plastic sheets that can be cut or trimmed. The principle of operation of sensors formed from thin films of this material is to regulate the light scattering properties of droplets of the birefringent liquid crystal by applications of an electric field. The electric field is which the material is sandwiched between glass or plastic sheets containing transparent conducting electrodes. In the absence of a voltage to the electrodes (off state), the optic axes of the microdroplets are randomly oriented as illustrated and scatter light. In this state the material appears an opaque white. Upon removal of the applied voltage, the large surface-area-to-volume ratio of the microdroplets allows surface interactions to return the nematic material to its random alignment and opaque texture. An electric field sensor is prepared using nematic liquid- crystal droplet materials and optical fiber systems. Transmission light intensity through the droplets is modulated by an ac electric field and its amplitude increases in good proportion to the electric field strength, covering a wide range. This paper presents a further development of a new fiber optic ion and high hydrostatic pressure sensing technique utilizing new classes of nematic liquid crystals droplets with a significantly reduced thermal sensitivity. The low- pressure sensor (up to 0.7 MPa) is based on polarization effects caused by strong rotary power of chiral nematics and pressure-induced deformations of a twisted nematic cell. The high-pressure sensor (up to 70 MPa) is based on intensity phenomena occurring in novel classes of chiral nematics with induced smectic phase. The latest results indicate that our method of hydrostatic pressure measurement offers high response to pressure with reduced temperature sensitivity.
CAD & CAM technologies are being used in design and manufacturing process, and are receiving increasing attention from industries and education. We have been researching to develop a new kind of software that is for web-course CAD & CAM. It can be used either in industries or in training, it is supported by IE. Firstly, we aim at CAD/CAM for optomechatronics. We have developed a kind of CAD/CAM, which is not only for mechanics but also for optics and electronic. That is a new kind of software in China. Secondly, we have developed a kind of software for web-course CAD & CAM, we introduce the basis of CAD, the commands of CAD, the programming, CAD/CAM for optomechatronics, the joint application of CAD & CAM. We introduce the functions of MasterCAM, show the whole processes of CAD/CAM/CNC by examples. Following the steps showed on the web, the trainer can not miss. CAD & CAM are widely used in many areas, development of web-course CAD & CAM is necessary for long- distance education and public education. In 1992, China raised: CAD technique, as an important part of electronic technology, is a new key technique to improve the national economic and the modernization of national defence. As so for, the education. Of CAD & CAM is mainly involved in manufacturing industry in China. But with the rapidly development of new technology, especially the development of optics and electronics, CAD & CAM will receive more attention from those areas.
A fuzzy logic control (FLC) implementation of a ball balancing system (BBS) is presented in this paper. A ball balancing system is built. Fuzzification of the input and output is accomplished. A set of the rules among measurements and control output are established. A multi-region method is proposed to provide a nonlinear compensation output and obtain better control results. A comparison with LQR control is made.