改变复印机定影系统的探讨

复印机是办公设备中耗电量较高的设备,其主要耗电部分是定影系统,定影系统中的定影灯一般在900W左右,对1000W多瓦的复印机来说,定影灯的耗电量能占到复印机的总耗电量的70％-80％。通过采用光固化的方法来替代原有的高温定影,这样将大大减少复印机的耗电量,同时减少了复印机的开机等待时间。如果这一定影方法能够应用到复印机上,那么也可延伸到其他需要高温定影的办公设备中,这对目前我国倡导的节能降耗有着十分现实的意义。     

常用佳能复印机定影温度异常故障代码清除技术

复印机的定影过程,实际就是定影辊内的加热灯来融化复印件上的墨粉,再通过加压使其达到定影的目的。但这个加热区若因故障原因,很容易造成加热灯无限量加热,因此烧坏上下定影辊或整机的线路,甚至造成火灾。所以复印机在设计上就增加了一个防止程序,只要定影系统的检测元件发现该系统温度异常,就停止复印机预热或继续工作。当出现定影温度异常故障自检码出现时,无论怎么开关电源,复印机都不会重新再工作了,必需用代码技术去清除故障代码,才能重新开启复印机。这对复印机使用者和维修人员是很实用。     

常用佳能复印机定影温度异常故障代码清除技术

复印机的定影过程，实际就是定影辊内的加热灯来融化复印件上的墨粉，再通过加压使其达到定影的目的。但这个加热区若因故障原因，很容易造成加热灯无限量加热，因此烧坏上下定影辊或整机的线路，甚至造成火灾。所以复印机在设计上就增加了一个防止程序，只要定影系统的检测元件发现该系统温度异常，就停止复印机预热或继续工作。当出现定影温度异常故障自检码出现时，无论怎么开关电源，复印机都不会重新再工作了，必需用代码技术去清除故障代码，才能重新开启复印机。这对复印机使用者和维修人员是很实用。     

复印机电源系统典型故障的原因分析与检修

静电复印机的电源系统是故障多发单元,文章首先介绍了复印机的供电方式,然后对复印机电源系统的典型故障及其如何检修进行了详细的分析,对于从事办公设备维修人员有一定的参考价值。     

复印机电源系统典型故障的原因分析与检修

静电复印机的电源系统是故障多发单元,文章首先介绍了复印机的供电方式,然后对复印机电源系统的典型故障及其如何检修进行了详细的分析,对于从事办公设备维修人员有一定的参考价值.     

从机器品质到用户品质

办公行业的不断发展,离不开厂商的技术革新,早在七十多年前,很多科学家开始投身于办公设备研究。其中复印机是办公设备中投入较早的一个产品。1938年美国物理学士查斯特卡尔逊（ChesterCarlson）发明了静电复印技术,这为复印机后期的发展提供了很好的技术支持。     

医院的节约经

前一时期有不少办公设备的使用者咨询到复印机节能的方法。经过调查和分析现将复印机节能的小窍门提供给大家,为企业或部门量身打造节能创收之道。     

办公一体化——多功能一体机选购指南

综合篇 电话、电脑、传真机、Modem……是办公桌上最常见的必备办公设备,在办公室的其它位置,人们还能看到打印机、复印机等较大的常用办公设备。这充分体现了现代办公中人们的多样化需求。但是复印机、打印机、传真机、扫描仪和微机等设备都是“各自为政”、“各职其事”、各占     

温度更低 绿色更多低温环保聚合碳粉技术浅谈

激光打印机．数码复合机等是我们常用的办公设备，同时也是办公室中的主要污染源头。这些设备工作的核心步骤是碳粉的转印定影．因此降低碳粉定影温度可以减少有害物质的产生。那么．怎样才能降低碳粉的定影温度呢？     

激光打印机定影故障的修复

一台佳能LBP—8A1激光打印机使用四年后定影系统发生故障,输出的样张不能定影,图象一擦就掉。经检查,定影加热灯、热敏电阻、热动开关均完好,故障出在控制电路上。 该机定影控制电路安装在主板上,主板为多层电路板,元件排列密集,引线很细。在无图纸难于准确诊     

European Community policy and the market

Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.     

一种自适应子融合集成多分类器方法

融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

Explanation and prediction: an architecture for default and abductive reasoning

Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.     

Three Process Perspectives: Organizations, Teams, and People

This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)^SM and Team Software Process (TSP){^SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical.     

基于复小波噪声方差显著修正的SAR图像去噪

提出了一种基于复小波域统计建模与噪声方差估计显著性修正相结合的合成孔径雷达(Synthetic Aperture Radar,SAR)图像斑点噪声滤波方法。该方法首先通过对数变换将乘性噪声模型转化为加性噪声模型,然后对变换后的图像进行双树复小波变换(Dualtree Complex Wavelet Transform,DCWT),并对复数小波系数的统计分布进行建模。在此先验分布的基础上,通过运用贝叶斯估计方法从含噪系数中恢复原始系数,达到滤除噪声的目的。实验结果表明该方法在去除噪声的同时保留了图像的细节信息,取得了很好的降噪效果。     

How do children do mathematics with LOGO?

Abstract  This paper considers some results of a study designed to investigate the kinds of mathematical activity undertaken by children (aged between 8 and 11) as they learned to program in LOGO. A model of learning modes is proposed, which attempts to describe the ways in which children used and acquired understanding of the programming/mathematical concepts involved. The remainder of the paper is concerned with discussing the validity and limitations of the model, and its implications for further research and curriculum development.     

Editorial: Special issue on recent advances in hybrid control theory and applications

正The demands of a rapidly advancing technology for faster and more accurate controllers have always had a strong influence on the progress of automatic control theory.In recent years control problems have been arising with increasing frequency in widely different areas,which cannot be addressed using conventional control techniques.The principal reason for this is the fact that a highly competitive economy is forcing systems to operate in regimes where     

Information for Authors

正Aim The Journals of Zhejiang University-SCIENCE(A/B/C)areedited by the international board of distinguished Chinese andforeign scientists,and are aimed to present the latest devel-opments and achievements in scientific research in China andoverseas to the world’s scientific circles,especially to stimulateand promote academic exchange between Chinese and for-eign scientists everywhere.     

View-based model-driven architecture for enhancing maintainability of data access services

In modern service-oriented architectures, database access is done by a special type of services, the so-called data access services (DAS). Though, particularly in data-intensive applications, using and developing DAS are very common today, the link between the DAS and their implementation, e.g. a layer of data access objects (DAOs) encapsulating the database queries, still is not sufficiently elaborated, yet. As a result, as the number of DAS grows, finding the desired DAS for reuse and/or associated documentation can become an impossible task. In this paper we focus on bridging this gap between the DAS and their implementation by presenting a view-based, model-driven data access architecture (VMDA) managing models of the DAS, DAOs and database queries in a queryable manner. Our models support tailored views of different stakeholders and are scalable with all types of DAS implementations. In this paper we show that our view-based and model driven architecture approach can enhance software development productivity and maintainability by improving DAS documentation. Moreover, our VMDA opens a wide range of applications such as evaluating DAS usage for DAS performance optimization. Furthermore, we provide tool support and illustrate the applicability of our VMDA in a large-scale case study. Finally, we quantitatively prove that our approach performs with acceptable response times.