福建卷柏属植物的物种多样性述评(英文)

卷柏属Selaginella Beauv.是一个在分类上较困难的类群,种类多,形态变化大。全世界有卷柏属植物750种以上,可以分为5个亚属。2002年10月我们对武夷山脉及周边地区的卷柏种类进行了调查,采集的标本存放于新加坡国立大学标本馆(SINU)和厦门大学标本馆(AU)。此外,我们还认真观察了来自福建师范大学标本馆(FNU)和AU的卷柏标本。结果表明,在福建,卷柏有18种1变种。其中,缘毛卷柏S. ciliaris、白毛卷柏S. albociliata和布朗卷柏S. braunii是福建分布的3个新记录

Novel approach to automated fingerprint recognition

The paper describes an enhanced fingerprint recognition system consisting of image preprocessing, feature extraction and matching that runs accurately and effectively on a personal computer platform. The image preprocessing includes histogram equalisation, modification of directional codes, dynamic thresholding and ridgeline thinning which are sufficient to enhance the image to a state ready for feature extraction. Only features extracted are stored in a file for fingerprint matching. The matching algorithm presented is a modification and improvement of the structural approach. Experimental results acquired for matching are accurate, reliable and fast for implementation using a PC and a fingerprint scanner. The proposed fingerprint recognition scheme can provide an efficient way of automated identification and can be extended to numerous other security or administration applications

Interfacing reprogrammable universal remote controller with multimedia PC

The paper describes the design and implementation of a low-cost electronic circuit which can be incorporated into a universal remote controller that is used to control electronic appliances such as televisions, video cassette recorders and audio systems. In an educational or a conference environment, the circuit can be used to facilitate computer-assisted presentations by acting as an interface between the universal remote controller and a personal computer (PC) so that multimedia database applications can be developed on a PC to retrieve desired video clips on a video cassette tape and play them on a TV via the universal remote controller

PC-controlled scent system

The paper describes an electromechanical system that is controlled .by a multimedia PC to press a chosen small bottle to emit scent. The scent may be from perfumes, fruits, flowers, etc., and will be related to the text information, pictures, audio and video clips presented on the PC. A user selects a scent for testing from a given set of database through a user-friendly PC-controlled window-based interface. The whole system is like an electronic information kiosk or educational kit, except that it can now provide this extra sensory information