热打印技术的现状及产业发展

热打印技术历经40余年的发展,是一项成熟技术,是信息化系统输出的重要手段。热打印技术在国外应用非常普遍,也正向着高速化、小型化、彩色化、混合式方向发展。     

Ceres-net: A low-cost computer network

This paper describes a local-area network, its hardware and software structure, and its protocol. The principal objective was to minimize the complexity of hardware and software, yet to offer an adequate functionality and performance for a system of up to 30 workstations with local file stores. The primary benefit of the achieved simple structure and low-overhead protocol is the system's reliability.     

结构建模竞赛3D打印节点的设计与优化

3D打印在土木工程行业中具有良好的应用前景,然而在目前的教学中鲜有涉及。第九届全国大学生结构建模大赛中首次引入了3D打印节点装配模型的制作。以湖南科技大学参赛作品为例,从3D打印节点的设计、优化和安装等角度,阐述了3D打印在大学生结构建模中的应用。构件由3D打印节点采用"卡""插""楔""套"4种方式进行组装,效果良好。大赛对土木工程专业本科生普及3D打印技术、拓展专业视野具有较好促进作用。     

Carbon print studies for the energy conservation regulations of the UK and China

The recently published building energy conservation regulation of China (GB50189-2005, 2005 [1]) was compared with the latest UK building energy conservation regulation (Part L) (Building Regulation Approved Document L2A, 2006 [2]). The UK regulation appeared stricter in its requirements and standards than the Chinese regulation. In two case studies, the design of a sample building is altered to fulfil the minimum requirements of the two regulations. The energy consumption and Carbon print of the virtual building under the two set of regulations are estimated by computer based models in the two case studies based on a building in the Cold regions. The building under the UK regulation showed higher energy efficiency and less Carbon emissions per year. The high level estimate in the case studies discovered a potential energy savings of 29% by strengthening the design requirements in the Chinese regulation to the UK level. The improvement on energy efficiency of buildings can be achieved in strengthening the proactive design aspects on building envelope, efficient HVAC, lighting and lighting control system. The software used was SBEM which is the default tool in the UK Part L regulation.     

杨木爆破浆作新闻纸配浆的初步研究

进行了杨木爆破浆配抄新闻纸的研究，杨木爆破浆取代马尾松化学浆配抄新闻纸后除撕裂度略有下降外，裂断长、拉毛速度、印刷密度、透印值等都有明显改善     

纸张的印刷适性

纸张的印刷适性对印刷品的质量有着显著的影响，从纸张的平滑度、油墨吸收性、Z向变形、表面强度、光散射等几个方面论述了它们对印刷品质量的影响。     

皂荚籽热风干燥特性及干燥动力学模型研究

目的:为了研究皂荚籽干燥特性,为其机械化剥离应用提供理论参考。方法:研究了不同温度(70、90、110与130℃)与不同预处理方法(清水、碳酸氢钠溶液、焦磷酸二氢二钠溶液和酒石酸氢钾溶液浸泡)对皂荚籽干燥动力学的影响,使用Lewis模型、Page模型与Weibull分布函数对其干燥特性曲线进行非线性拟合并进行评价,并通过应面回归模型建立起干燥动力学模型。结果:皂荚籽干燥过程存在明显的升速降速段,且干燥温度越高,干燥速率越快,预处理方法对其干燥速率有一定影响。通过比较各模型的分别是决定系数()、卡方检验值()、残差平方和()与均方根误差(),结果显示Weibull分布函数能更好地模拟皂荚籽干燥过程,形状参数()随温度的升高而降低,尺寸参数()与预处理方法有关。计算了皂荚籽干燥过程的有效水分扩散系数()及其估算值()与活化能(),水分扩散系数及其估算值随着温度的升高而升高,经过酒石酸氢钠溶液预处理的皂荚籽的活化能低于其它预处理方法,可大大提高皂荚籽干燥效率。结论:经碳酸氢钠溶液预处理的皂荚籽干燥较容易发生,Weibull函数能较好地描述皂荚籽干燥过程中水分含量的变化规律,酒石酸氢钠溶液可以降低皂荚籽的活化能。该研究可为皂荚籽干燥提供理论和技术基础。     

育果袋纸生产工艺改造及成本分析

与传统育果袋纸生产方法相比,采用印刷法生产育果袋纸具有生产效率高、环境友好等特点.在前期研究基础上,本文探讨了印刷法生产育果袋纸工艺设备的改造方案,可实现育果袋纸原纸生产与后续印刷过程连续化的目的.此外,还对以不同原料采用传统生产工艺——层合法制备育果套袋纸和以OCC为原料采用印刷法制备育果套袋纸的生产成本进行了比较.改造结果表明:无论采用圆网纸机或长网纸机,通过对设备进行简单地调整或增加印刷单元,即可实现印刷法育果套袋纸工艺的连续化生产;原料成本核算结果表明:以废旧瓦楞纸板纸浆为原料采用印刷法制备育果袋纸,其成本虽与传统方法相当,但却提高了生产效率,降低了环境污染.因此,若在今后的研究中,能够研究开发出适合育果袋纸生产的低成本油墨,对于育果袋纸产业而言具有较大的借鉴意义.     

嵌入式控制系统LCD驱动问题研究

文章讨论液晶（LCD）显示驱动问题。液晶显示模块一般由控制器、驱动器和显示屏组成,不同型号的显示模块只要使用同一型号的控制器,驱动程序基本相同。液晶显示控制器根据结构可分为TN、STN和TFT几种,根据功能则有字符型和点阵型之分。字符型LCD只能显示西文字符和笔划较少的汉字,功能较少,价格低廉,编程容易;点阵型LCD功能强大,可以显示较复杂的汉字和各种曲线。虽然LCD产品型号繁多,功能各异,但其驱动程序还是有规律可循。本文就液晶显示驱动规律谈自己的工作体会,供同行参考。     

The Worst Page-Replacement Policy

In this paper, we consider the following question: what is the worst possible page-replacement strategy? Our goal is to devise an online strategy that has the highest possible fraction of page faults as compared to the worst offline strategy. We show that there is no deterministic, online page-replacement strategy that is competitive with the worst offline strategy. We give a randomized strategy based on the “most-recently-used” heuristic and show that this strategy is the worst possible online page-replacement strategy.