试论我国锦纶生产发展方向

回顾了锦纶发展简史，综述了国内锦纶生产现状，并论述了我国锦纶生产发展方向，必须大力发展原料工业；加快老企业的设备改造；使其达到规模经济，大力发展差别化、高附加值、功能性纤维。同时，提出了锦纶各品种的发展趋向。     

煤岩配煤技术的发展与现状

煤岩学在炼焦配煤技术上的应用,使炼焦配煤手段更有效,使焦炭质量预测在生产上应用成为可能,为定性的经验配煤技术跃变到定量的科学配煤技术创造了条件。夏皮洛煤岩配煤技术是目前较好的配煤方法,其相关系数可达0.93;国内许多学者在煤岩配煤方面也做了大量研究工作,有些相关系数达0.98。目前虽然各种方法存在一定局限性,但随着计算机和图像处理技术的发展,煤岩学在指导配煤技术方面将有新的突破。     

基于BP网络的保护渣性能预测模型的研究

结合BP网络计算机实验研究 ,建立了保护渣化学组成与性能的预测模型 ,并利用化学组成与性能的关系 ,对网络的实用性进行了检验 ,结果符合保护渣化学组成与性能的关系。保护渣粘度随着保护渣碱度的增大而减小 ,而半球点温度随碱度增大而增大 ;保护渣的半球点温度和粘度都随着渣中CaF2 含量的增加而减小。用BP网络的误差反向传播算法建立的保护渣的化学组成与性能的预测模型 ,得出的预测值与实际值的误差小 ,对保护渣的设计与应用都有一定的指导作用。     

A new approach of audio emotion recognition

A new architecture of intelligent audio emotion recognition is proposed in this paper. It fully utilizes both prosodic and spectral features in its design. It has two main paths in parallel and can recognize 6 emotions. Path 1 is designed based on intensive analysis of different prosodic features. Significant prosodic features are identified to differentiate emotions. Path 2 is designed based on research analysis on spectral features. Extraction of Mel-Frequency Cepstral Coefficient (MFCC) feature is then followed by Bi-directional Principle Component Analysis (BDPCA), Linear Discriminant Analysis (LDA) and Radial Basis Function (RBF) neural classification. This path has 3 parallel BDPCA + LDA + RBF sub-paths structure and each handles two emotions. Fusion modules are also proposed for weights assignment and decision making. The performance of the proposed architecture is evaluated on eNTERFACE’05 and RML databases. Simulation results and comparison have revealed good performance of the proposed recognizer.     

我国热带地区燃料油植物资源的开发和利用

论述了我国热带地区燃料油植物资源的开发意义及燃料油植物的特点;介绍了热带地区种子或种仁含油率大于50 % 的15种燃料油植物的分布及生物学特性;提出了热带燃料油植物研究与开发利用需解决的问题和热带燃料油植物应用前景.     

基于Web的重点建设项目管理系统

为提高重点建设项目的管理水平和工作效率,在详细分析重点建设项目的业务流程和用户需求的基础上,提出基于Web的重点建设项目信息管理系统。该系统采用典型的三层体系架构,具有较强的可扩展性和灵活性。通过该系统对重点建设项目信息科学管理,可以有效克服传统管理方式的弊端,极大地提高重点建设项目信息管理工作的效率。     

金属间化合物的研究现状及其最新发展趋势

主要介绍了金属间化合物的概念、发展历程、研究现状及几种常用金属间化合物的发展状况，并提出了该类材料的最新发展趋势。     

聚丙烯结构壁管专用料的开发

阐述了塑料结构壁管的基本情况和国内外现状．重点就扬子石油化工股份有限公司研究院研制的聚丙烯结构壁管专用料的情况进行了介绍。     

山梨醇类聚丙烯成核剂的开发与应用研究进展

综述了山梨醇类聚丙烯成核剂产品在国内外的开发进展，介绍了该类成核剂在聚丙烯中的应用和效果，及其作用机理。     

Performance evaluation of an importance sampling technique in a Jackson network

Importance sampling is a technique that is commonly used to speed up Monte Carlo simulation of rare events. However, little is known regarding the design of efficient importance sampling algorithms in the context of queueing networks. The standard approach, which simulates the system using an a priori fixed change of measure suggested by large deviation analysis, has been shown to fail in even the simplest network settings. Estimating probabilities associated with rare events has been a topic of great importance in queueing theory, and in applied probability at large. In this article, we analyse the performance of an importance sampling estimator for a rare event probability in a Jackson network. This article carries out strict deadlines to a two-node Jackson network with feedback whose arrival and service rates are modulated by an exogenous finite state Markov process. We have estimated the probability of network blocking for various sets of parameters, and also the probability of missing the deadline of customers for different loads and deadlines. We have finally shown that the probability of total population overflow may be affected by various deadline values, service rates and arrival rates.