Database management and analysis tools of machine induction

This paper surveys machine induction techniques for database management and analysis. Our premise is that machine induction facilitates an evolution from relatively unstructured data stores to efficient and correct database implementations.     

A support vectors classifier approach to predicting the risk of progression of adolescent idiopathic scoliosis.

A support vector classifier (SVC) approach was employed in predicting the risk of progression of adolescent idiopathic scoliosis (AIS), a condition that causes visible trunk asymmetries. As the aetiology of AIS is unknown, its risk of progression can only be predicted from measured indicators. Previous studies suggest that individual indicators of AIS do not reliably predict its risk of progression. Complex indicators with better predictive values have been developed but are unsuitable for clinical use as obtaining their values is often onerous, involving much skill and repeated measurements taken over time. Based on the hypothesis that combining common indicators of AIS using an SVC approach would produce better prediction results more quickly, we conducted a study using three datasets comprising a total of 44 moderate AIS patients (30 observed, 14 treated with brace). Of the 44 patients, 13 progressed less than 5 degrees and 31 progressed more than 5 degrees. One dataset comprised all the patients. A second dataset comprised all the observed patients and a third comprised all the brace-treated patients. Twenty-one radiographic and clinical indicators were obtained for each patient. The result of testing on the three datasets showed that the system achieved 100% accuracy in training and 65%-80% accuracy in testing. It outperformed a "statistically equivalent" logistic regression model and a stepwise linear regression model on the said datasets. It took less than 20 min per patient to measure the indicators, input their values into the system, and produce the needed results, making the system viable for use in a clinical environment.     

Towards a Formal and Implemented Model of Argumentation Schemes in Agent Communication

Argumentation schemes are patterns of non-deductive reasoning that have been the focus of extended study in argumentation theory. They have also been identified in computational domains including multi-agent systems as holding the potential for significant improvements in reasoning and communication abilities. By focusing on models of natural language argumentation schemes, and then building formal systems from them, direct implementation in multi-agent environments becomes a possibility. The formal, representational and implementational details are presented here, along with results that demonstrate not only advantages of flexibility, scope, and knowledge sharing, but also of computational efficiency.     

A gateway development system

There are an increasing number of local area networks being developed and built for use in a wide range of environments. The underlying communication architecture in the majority of cases is either a broadcasting or ring system. This paper describes a gateway development system which is specifically designed to deal with the interconnection of broadcast and ring systems. The gateway makes use of recently developed microprocessor chips to handle the different requirements of the two networks being connected. In particular, the gateway will be used to link an Ethernet-like system and a Cambridge Ring.     

"聪明的药丸"智能、可连网的药物分配机

本文介绍俄"聪明的药丸"可帮助解决许多错误用药的问题。它是一个具备数据库构件、网页连接、计时功能以及I/O设备控制等功能的小型嵌入式计算机。     

Development of a pressure control system for brace treatment of scoliosis

Bracing is a common nonsurgical treatment for scoliosis, but its effectiveness has been debated. Some clinical studies have shown efficacy of brace treatment is correlated to how the brace has been worn. The more often the patients wear their braces to the prescribed tightness as well as the prescribed length of wear each day, the better the treatment outcome. A system of four wireless pressure control devices was developed to understand brace wear-time and regulate a target pressure range at the brace-body interface. Each pressure control device could function independently and be embedded in the brace at key pressure areas. Such a system could improve the quality of brace wear-making the treatment more effective and refining our understanding of the three-pressure-point brace treatment concept during daily activities. This paper reports the system development and validation. The system was tested on four healthy subjects for 2 h without pressure regulation and 2 h with regulation. The results show that the pressure regulation doubled the time spent in a desired pressure range on average (from 31% to 62%). Brace-wear time was logged correctly. The system was also validated through a seven-day continuous test, and a fully charged battery could run for 30 days without requiring recharge.     

高级电视中的灵巧集成技术

接要:介绍了典型的LCDTV为系统集成提供的模拟接口、数字接口,减少了内部连线,分析了“灵巧集成”的复杂度问题。采用在单芯片上集成多种接口和控制器功能的大规模集成电路可减少元器件的数量并且提高生产能力,但是有一定的风险。     

设计直接转换I／Q解调器接收器时对IP2和IP3的考虑

与传统超外差式接收器架构相比,直接转换接收器架构有许多优点.因为直接转换接收器不容易受镜频信号干扰,所以它降低了对RF前端带通滤波的要求.RF带通滤波器仅需要衰减较强的带外信号,以防止它们使前端过载.另外,直接转换接收器无须IF放大器和带通滤波器.RF输入信号直接转换成基带信号,在这种情况下,放大和滤波都容易了许多.这种接收器的总体复杂性降低了,器件数目也减少了.     

A quantitative comparison of synaptic density following perfusion versus immersion fixation in the rat cerebral cortex

The main objective of the present study was to perform an unbiased comparison of immersion vs. perfusion techniques to assess whether we could use the former to quantify synapses through electron microscopy (EM). Using the immersion technique is ideally suited for instances in which the specimen under study could not be perfused under the standard EM protocol. Our results suggest that, despite suboptimal qualitative results, fixation by immersion allows for adequate quantification of synapses.     

Extraction/conversion of geometric dimensions and tolerances for machining features

It is important for a feature-based system to preserve feature integrity during feature operation, especially when feature interaction occurs. The paper presents a feature conversion approach to convert design features used in a design model into machining features for the downstream applications. This process includes both form features (geometric information) and non-geometric features conversion. Most researchers have concentrated on geometric information extraction and conversion without tackling the important problem of non-geometric feature information. This paper focuses on the extraction and conversion of feature geometric dimensions and tolerances (GD&T) for downstream machining application.The main barrier to the integration of a feature-based CAD/CAPP/CAM system – feature interaction – is discussed in this paper, which alters design features in their geometries and non-geometric information. How to identify and validate these feature dimensions and tolerances is one of the key issues in feature interaction conversion. The development of robust methodologies for preserving feature integrity for use in process planning application is the main thrust of the work reported in this paper.