城市大气移动监测系统的研究

本文研究了一种新型的城市大气移动监测系统,该系统以城市交通为载体。大气监测装置可以监测到几乎整个城市的大气情况,能够便捷、全面地对整个城市大气进行监测。系统通过传感器对空气进行采样,通过GPS设备进行无线数据传输。依据数据绘制实时空气质量直方图及当前车辆所在的位置地图,并做出分析,画出各区域一天内的大气变化直方图及曲线图,将结果发布在Internet上,供市民上网浏览。     

Spatial interest pixels (SIPs): useful low-level features of visual media data

Visual media data such as an image is the raw data representation for many important applications. Reducing the dimensionality of raw visual media data is desirable since high dimensionality degrades not only the effectiveness but also the efficiency of visual recognition algorithms. We present a comparative study on spatial interest pixels (SIPs), including eight-way (a novel SIP detector), Harris, and Lucas‐Kanade, whose extraction is considered as an important step in reducing the dimensionality of visual media data. With extensive case studies, we have shown the usefulness of SIPs as low-level features of visual media data. A class-preserving dimension reduction algorithm (using GSVD) is applied to further reduce the dimension of feature vectors based on SIPs. The experiments showed its superiority over PCA.

Lot-sizing scheduling with batch setup times

This paper is concerned with scheduling independent jobs on m parallel machines in such a way that the makespan is minimized. Each job j is allowed to split arbitrarily into several parts, which can be individually processed on any machine at any time. However, a setup for uninterrupted s_j time units is required before any split part of job j can be processed on any machine. The problem is strongly NP-hard if the number m of machines is variable and weakly NP-hard otherwise. We give a polynomial-time -approximation algorithm for the former case and a fully polynomial-time approximation scheme for the latter. AMS Subject Classifications: 68M20 · 90B35 · 90C59     

基于最短路径距离的宗地地价点状因素自动化评价*

首先提出最短路径距离在宗地地价点状因素评价中的应用模式,然后设计节点-连线-街区网络数据模型和与之相应的网络外抽象节点接入网络的规则,构造基于最短路径查询的动态网络,最后采用改进型Dijkstra算法计算出宗地地价点状因素评价结果。     

Research on the Application of Essential Information Technology in Food Safety Supply Chain

I. INTRODUCTION Along with the economical rapid development and the living standard unceasing enhancement, the consumer request to food quality in a new stair, food consumption pattern has assumed multiplex development tendency, food demand pattern transforms into "the multi- varieties, guarantees safety". Food no longer only is essential item which satisfies life needs; the consumer attention to food from the quantity moves towards the credit level, food security problem appears. How doe…     

不确定规则推理在预测算法中的应用

文章针对海洋渔业资源的多种预测算法得到的结果集,提出了以框架的知识表示理论为基础的不确定规则推理预测系统修正算法,利用框架系统ＫＢＩＦ（Ｋｎｏｗｌｅｄｇｅ Ｂａｓｅ ｉｎ Ｆｒａｍｅ）的知识表示理论与黑板结构、不确定推理相结合对预测算法根据不同环境参数进行多种方式的修正,可以对系统预测结果进行有效的分析,以期得到更好的应用。     

Henon映射产生的地毯图案

由迭代函数系统可以产生地毯图案 ,这是由于迭代函数系统的随机性选择能产生分形图形。本文从不同的角度 ,利用确定的简单数学模型二维函数 Henon映射所特有的动力系统混沌性质生成了地毯图案。     

基于工作站机群结构的并行数据库连接算法的实现

本文心细介绍了基于无共享并行结构的并行嵌套环连接（ＰＮＬＪ）算法的实现,旨在探索并行数据库系统的实现技术。     

数据发掘在服装设计中的应用

本文根据一服装企业的实际数据采用数据发掘手段提取出一系列规则,用以描述颜色搭配与款式受欢迎间的规律。挖掘过程中主要采用了按模型聚类的方法,这一方法获得的聚类结果简单直观。对聚类结果采用约简等简单处理后可获得一组实用的颜色搭配规则。类似的数据发掘手段在服装设计各方面有广泛的应用前景。