Dy α-β Sialon 陶瓷的制备与相变研究

在Ｄｙ－Ｓｉ－Ａｌ－Ｏ－Ｎ系统相关系的研究基础上，设计了以ＤｙＡＧ和Ｍ’相作为晶界相的单相α－Ｓｉａｌｏｎ和β－Ｓｉａｌｏｎ以及复相α－β－Ｓｉａｌｏｎ材料。研究了它们的致密化行为，热处理过程中的α′→β′相变机制以及力学性能。结果表明：可以制备出以ＤｙＡＧ和Ｍ’本作为晶界相的单相α－Ｓｉａｌｏｎ和β－Ｓｉａｌｏｎ以及复相α－β－Ｓｉａｌｏｎ材料。作为绕结助剂，ＤｙＡＧ比Ｍ’更能有效地促进致密化。     

最新DAC集成电路

日本ＮＰＣ公司最近推出型号为ＳＭ５８６６Ａ的芯片,它的特点是既能用于ＳＡＣＤ的,１比特ＤＳＤ格式,也能用于ＤＶＤ－Ａｕｄｉｏ的ＰＣＭ格式。由于ＳＡＣＤ和ＤＶＤ－Ａｕｄｉｏ两种格式,究竟是谁一统天下尚未见分晓,因此芯片生产厂家也脚踏两只船。ＳＭ５８６６的工作电压为４．５Ｖ－５．５Ｖ;工作温度－４０℃－８５℃;封装形式：２８脚ＳＯＰ,是一枚单声道的ＤＡＣ。其规格如下：适用于ＤＳＤ／ＳＡＣＤ和２４ｂｉｔＰＣＭ两种格式谐波失真ＴＨＤ＋Ｎ：ＤＳＤ模式／－１０９ｄＢ时,０．０００３６％２４ｂｉｔ;ＰＣＭ模式…     

AMPS-DMAEMA两性聚合物溶液性能的研究

研究了自制的两性聚合物ＡＭＰＳ－ＤＭＡＥＭＡ（简写为ＡＳＤＡ）组成与等电点的关系。制得了等电点状态下的两性聚合物ＡＳＤＡ－５０（ｐＨ＝５）。推导出了等电点下的两性聚合物溶液的比浓粘度与聚合物浓度无关的表达式，并用实验证实了这一关系式。利用ｐＨ的影响制得了与ＡＳＤＡ－５０具有相同分子量、相同分子链结构的单性聚电解质ｄＡＳＤＡ－５０。二者的对比研究表明，ＡＳＤＡ－５０具有明显增大的特性粘数。     

AMPS—DMAEMA两性聚合物

研究了自制的两性聚合物ＡＭＰＳ－ＤＭＡＥＭＡ，推导出了等电点下的两性聚合物溶液的比浓粘度与聚合物浓度无关的表达式，并用实验证实了这一工。利用ＰＨ的影响制得了与ＡＳＤＡ－５０具有相同分子量、相同分子链结构的单性聚电解质ｄＡＳＤＡ－５０。二者的对比研究表明，ＡＳＤＡ－５０具有明显增大的特性粘数。     

EDFA及其在上海有线电视郊县联网中的应用

本文首先讨论了ＦＭ，数字、ＡＭ－ＶＳＢ三种有线电视光纤传输系统的特点，提出采用ＡＭ－ＶＳＢ１５５０ｎｍ光发射机和ＥＤＦＡ进行中继传输的方式是上海有线电视郊县联网最经济有效的方式。     

几类重要的反应性高分子应用研究进展

本文主要叙述了ＰＥ－ｇ－ＭＡＨ，ＰＰ－ｇ－ＭＡＨ，ＥＰＤＭ－ｇ－ＭＡＨ，ＰＳ－ｇ－ＧＭＡ，ＳＥＢＳ－ｇ－ＧＭＡ，ＰＰ－ｇ－ＡＡ等几种反应性高分子的制备及应用，研究现状和它们未来发展的趋势。     

抑制等信道间距陆上干线光纤通信系统中光纤色散和四波混频效应的新方案

提出了一种用以克服等信道间距划分、波分复用（ＷＤＭ）＋掺饵光纤放大器（ＥＤＦＡ）陆上光纤通信系统中光纤色散和四波混频（ＦＷＭ）效应的新方案。采用１５５０ｎｍ处色散为－２．８９ｐｓ／ｋｍ／ｎｍ的小色散单模光纤（ｓｍａｌｌ－ｄｉｓｐｅｒｓｉｏｎｓｉｎｇｌｅ－ｍｏｄｅ－ｆｉｂｅｒ，ＳＤＳＭＦ）可避免严重的ＦＷＭ效应，同时利用ＩＴＵ－ＴＧ．６５２非色散位移光纤（ｎｏｎ－ｄｉｓｐｅｒｓｉｏｎ－ｓｈｉｆｔｅｄｆｉｂｅｒ，ＮＤＳＦ），在ＥＤＦＡ整个带宽范围内（１５３０～１５７０ｎｍ）补偿ＳＤＳＭＦ引入的负色散。采用此方案，一个１０路×１０Ｇｂ／ｓ、１０级ＥＤＦＡ级联的等信道间距（１ｎｍ）光纤通信系统，经近千公里的光纤传输后，ＦＷＭ和色散引入的恶化量将分别小于１ｄＢ。     

MOCVD热力学分析软件的开发

报导了最新开发的ＭＯＣＶＤ热力学分析软件－ＭＯＣＶＤＴＡ，它是一个采用目前比较 ＶＣＳ算法对ＭＯＣＶＤ的稳态系统进行单参数及双参数分析的软件。介绍了其功能，特点，使用方法以及适用条件，并且以Ａｓ－Ｈ系统及Ｇａ－Ａｓ－Ｃ－Ｈ系统为例进行了模拟，得到了很好的模拟结果。     

飞机结构件集成化CAPP系统

本文介绍了一个飞机结构件ＣＡＰＰ系统ＦＡ－ＣＡＰＰ，它是运行于成都飞机工业公司ＣＩＭＳ环境的集成化ＣＡＰＰ系统，实现了同ＣＩＭＳ各集成单元的集成。文中介绍了ＦＡ－ＣＡＰＰ的主要功能，重点讨论了ＣＡＤ／ＣＡＰＰ／ＣＡＭ的集成、特征基工艺决策及其专家系统、知识库技术的应用等关键技术问题。     

1种基于AD590的温度数据采集系统

简述ＡＤ５９０温度传感器的测温原理及其特点，介绍ＡＤ５９０在以ＭＣＳ－５１单片机为微处理器的温度数据采集系统中的应用。文章着重讨论了温度数据采集系统的软硬件设计方法。     

计算机仿真在生产系统分析中的应用

系统总结了计算机仿真技术对生产系统的重要作用,利用Ithink5．0软件建立了简单生产过程的计算机仿真模型并进行了分析。     

应用成组技术实现制造敏捷化、分散化、网络化

本文分析了敏捷化、分散化、网络化制造与应用成组技术之间的关系，提出了应用成组技术实现敏捷化、分散化、网络化制造的方法，探讨了我国制造企业基于成组技术的敏捷生产组织构建方法以及敏捷制造单元的成组与重构技术，为我国中小企业特别是离散型制造企业实现敏捷化、分散化、网络化制造作了有益探索。     

Manufacturing lines under surplus-based control: multiple products and bounded buffers

Challenged by the scheduling complexity for production flow processes in industrial facilities, we study the performance of multi-product producing lines. We analyse the performance of multi-product lines that consist a number of machines and bounded buffers with preselected base stock levels. It is assumed that each manufacturing machine in the line is capable of working with several product types, but only operate on one product at a time. The network is operated under a surplus-based production control policy in the presence of perturbations and production demand fluctuations. We derive bounds on the demand tracking accuracy for each product type, regardless its flow direction in the multi-product line. In addition, for a multi-product line with unidirectional product flow, we obtain a quantitative relation between demand tracking accuracy, its inventory levels, numbers of product types, buffer capacity limits and perturbations. The accuracy of the obtained demand tracking bounds is illustrated by numerical simulations. By means of simulation experiments, we show that the obtained results have a valuable meaning and can be used as a reference tool in practice.     

分布式生产系统的信息结构

从信息系统的角度，以一个简化的例子（分布式异步制造系统），对分布式系统建模，并研究了系统硬、软约束的具体实现等方面的问题。编制了分布式异步虚拟生产系统，在Ｎｏｖｅｌ网上进行仿真的结果表明，该信息结构模型是有效的。     

A conceptual framework for the ubiquitous factory

To cope with today's industrial demands requiring (1) coverage of the whole product life cycle, (2) environmentally conscious manufacturing, (3) competitive sustainability manufacturing, etc., a new manufacturing paradigm should be developed. In this paper, we develop a conceptual framework for a new paradigm called ubiquitous factory (u-Factory) by applying ubiquitous computing technology to the manufacturing system. The u-Factory is based on our previously developed paradigm, called UbiDMR [1], meaning product design, manufacturing, and recycling via ubiquitous computing technology. The essence of u-Factory can be represented by three key phrases: (1) information transparency, (2) autonomous control, and (3) sustainable manufacturing. This paper comprises two parts. In the first part, we show the derivation procedure for the framework of the u-Factory using problem analysis of the current manufacturing system, design consideration and derivation of the architecture for the ubiquitous factory. In the second part, to demonstrate the validity and impact of the derived architecture, we develop the TO-BE model for manufacturing resource management. This is followed by a comparison with the AS-IS model.     

跨入21世纪的先进光学制造技术

以21世纪的光学、光学工程和先进制造技术两大领域不断深化的学科交叉及其发展趋势为背景,从更高和更宽的视角上讨论先进光学制造技术的跨世纪发展。指出“一大一小”引领着先进光学制造技术的发展主流。先进光学制造技术应该在自然科学的学科体系中占有一席之地。     

Blockchain-based ubiquitous manufacturing: a secure and reliable cyber-physical system

With product customisation and emerging business opportunities, small and medium manufacturing enterprises (SMEs) must find ways to collaborate and share competency in a trustable manner to survive a turbulent market. Therefore, service industry turns to the manufacturing industry and SMEs migrate to cloud manufacturing (CM) and ubiquitous manufacturing. However, existing platforms use centralised networking, which suffers from security, scalability and big-data problems. In this paper, we propose a blockchain-based platform as a trustable network to eradicate third-party problems, which can improve the scalability, security and big-data problems for SMEs. Our proposed platform is developed based on a consortium blockchain which provides a peer-to-peer communication network between the end user and the service provider. We improve existing consensus mechanism and communication protocol based on a cyber-physical system (CPS), via an autonomous agent. Firstly, we provide a review of cloud manufacturing, ubiquitous manufacturing and blockchain-based manufacturing approaches by highlighting the main problems. Then, the proposed platform, blockchain ubiquitous manufacturing (BCUM), is explained, based on its architecture, consensus algorithm and CPS, with the help of autonomous agent communication. The proposed platform has been developed for 3D printing companies which are geographically distributed and tested based on network performance and three practical scenarios.     

Design of delayed reconfigurable manufacturing system based on part family grouping and machine selection

To improve the convertibility of reconfigurable manufacturing system (RMS), the concept of delayed reconfigurable manufacturing system (D-RMS) was proposed. RMS and D-RMS are both constructed around part family. However, D-RMS may suffer from ultra-long system problem with unacceptable idle machines using generic RMS part families. Besides, considering the complex basic system structure of D-RMS, machine selection of D-RMS should be addressed, including dedicated machine, flexible machine, and reconfigurable machine. Therefore, a system design method for D-RMS based on part family grouping and machine selection is proposed. Firstly, a part family grouping method is proposed for D-RMS that groups the parts with more former common operations into the same part family. The concept of longest relative position common operation subsequence (LPCS) is proposed. The similarity coefficient among the parts is calculated based on LPCS. The reciprocal value of the operation position of LPCS is adopted as the characteristic value. The average linkage clustering (ALC) algorithm is used to cluster the parts. Secondly, a machine selection method is proposed to complete the system design of D-RMS, including machine selection rules and the dividing point decision model. Finally, a case study is given to implement and verify the proposed system design method for D-RMS. The results show that the proposed system design method is effective, which can group parts with more former common operations into the same part family and select appropriate machine types.     

Use of the manufacturing system design decomposition for comparative analysis and effective design of production systems

The focus of this paper is on the use of the Manufacturing System Design Decomposition (MSDD) to make effective cost and production system design decisions. A comparative study is conducted to illustrate how and why the total cost is reduced when the functional requirements defined by the MSDD are achieved. The ultimate goal of this research was to advance manufacturing and production system development to being guided by engineering science and design rather than the common practice of duplicating another person’s or entity’s notion of the best physical implementation.     

“制造强国”评价指标体系构建及初步分析

制造业是实体经济的主体、国民经济的支柱。本文描述了我国制造业"大而不强"的现实状况,借鉴国内外制造业产业评价体系的研究经验,确定了"制造强国"的内涵和特征,构建了包括四个一级指标和18个二级指标在内的"制造强国"综合评价体系,并以此为基础,对中国和其他几个国家的制造业指标横向对比进行了初步分析。