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针对以往基于Web的实时监控系统在实时性方面的不足,利用Ajax技术设计了一种新的工业过程实时监控系统框架,该系统采用多层B/S模式软件体系结构,依据OPC规范设计,应用Ajax技术实现了动态更新Web页面中的数据. 相似文献
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在软件复用基本理论和技术的基础上,阐述了软件体系结构对软件复用的意义,提出了基于软件体系的软件复用开发方法以及在建筑陶瓷三维虚拟展示系统开发过程中的应用。 相似文献
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利用BIM技术进行通风空调工程设计,能够保证设计的准确性,相比传统的2D图纸有巨大的优势。本文分析了某综合楼通过使用BIM建模技术对通风空调工程的设计和深化的方法,分析了在工程中如何使用BIM技术对管道碰撞进行检测等,帮助设计人员更好地利用BIM技术对通风空调工程进行设计。 相似文献
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分析了氯化钙的干燥特性,进行了干燥方式的选型。对氯化钙流化床干燥系统进行了设计计算,在设计中采用了部分气体循环等有针对性的技术。运行结果表明干燥方法合理先进、设计可靠、经济效益显著。 相似文献
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用面向对象技术来分析设计与实现网络答疑系统的方法,采用Rational Rose UML建模工具进行系统分析设计,利用JSP技术进行系统开发,以此来探讨面向对象技术在Web开发中的应用。 相似文献
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为设计效率高、性能稳定的低比转数离心泵,结合传统的速度系数法和内部流动分析技术进行了水力设计和改进。给出了低比转数离心泵的初步设计思路、内部流动分析和性能预测方法,基于速度系数法设计的模型的实验结果验证了数值方法的合理性。在初步设计基础上,针对传统设计难以把握的蜗壳关键尺寸参数对性能的影响进行了分析,以此为依据对关键结构与参数进行改进设计,数值模拟和实验表明,改进设计使性能得到了提高。该设计方法与流程的采用,可有效提高泵的水力性能的同时减少试验次数,从而缩短了离心泵产品开发周期。 相似文献
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本文首先对CAD技术的应用情况和在化工设各设计中应用CAD技术的优势进行了简要分析,并进一步说明了在化工设备设计中应用CAD技术的方法。文章重点对开发化工设备CAD软件应注意的几个方面做了较详细的论述。最后对如何提高CAD技术在化工设备设计中的应用水平提了一些个人看法。 相似文献
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现今流行的一些书籍、期刊杂志、广告、招贴、网页等,已看不到长篇累牍的枯燥文字,取而代之的是用大量生动、吸引人的图片、插图、版式以及视觉整体设计来表达内容。一些设计精良的图书,“图文”各占的比例正在偏向“图”,真正做到了”图文并茂”。这种设计方式正在成为人们喜闻乐见的形式。计算机技术的飞速发展,印刷系统的各种新形式,软件的开发利用,以及网络技术、多媒体技术的应用等,更使大众传媒的视听表现获得了前所未有的创造空间。 相似文献
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The nanoporous thermal insulating material was prepared by using fumed silica,SiC powder and glass fiber as starting materials,the appropriate thickness of the nanoporous thermal insulating material lined in ladle was discussed by the simulation method,and the effect of its application as ladle lining was investigated.The results show that the thermal conductivity of the nanoporous thermal insulating material prepared in composition of fumed silica: SiC powder: glass fiber =75: 20:5 (in mass) is 0.023 W · m^-1 · K^-1 at 1 000 ℃,the appropriate thickness of the nanoporous thermal insulating material lined in ladle is ≤ 5 mm and the average temperature of the ladle outside surface when lined with the nanoporous thermal insulating material is 95 ℃ lower than that with the ordinary thermal insulating material. 相似文献
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ZHAO Fei ZHU Boquan LI Xiangcheng ZHU Yuenan 《中国耐火材料》2014,(3):31-34
The basic formulation of Al2O3- C slide plates was65%( in mass,the same hereinafter) white fused corundum particles,25% white fused corundum fines,6% active α-Al2O3 micropowder,4% carbon black and flake graphite, and additional 4% phenolic resin.Based on this formulation,3% Al powder,3% Si powder,and 3% Al + 3% Si powder were used to substitute equivalent white corundum fines to improve the hot mechanical properties of Al2O3- C slide plates. The specimens with dimensions of 140 mm × 25 mm × 25 mm were pressed at 150 MPa,dried at 200 ℃ for 24 h,and hot treated at 1 400 ℃ for 3 h in carbon embedded condition. Then hot modulus of rupture and thermal shock resistance of the specimens were tested and the phase compositions and microstructure were analyzed. The results show that specimen with 3% Al powder has the higher hot modulus of rupture but lower residual modulus of rupture after thermal shock than the specimen with3% Si powder; the specimen with 3% Al + 3% Si powders exhibits the highest hot modulus of rupture and the best thermal shock resistance; the change of mechanical property is closely related with the in-situ formed nonoxides: AlN in the form of bars is formed in specimens with Al powder; fibrous SiC whiskers are formed in specimens with Si powder; in the specimens with both Al and Sipowders,besides AlN and SiC whiskers,hexagonal tabular SiAlON is in-situ synthesized,which interlocks with each other. 相似文献
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视频技术是教学资源应用中的重点和难点,目前教学资源中对视频信号采集、存储和压缩都存在着一定的困难。但随着计算机技术的不断发展,数字视频在教学中的应用越来越广泛。本文将论述数字视频的特点,数字视频的压缩格式,以及数字视频技术教学过程中的应用: 相似文献
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“工学结合,项目驱动”的高职高专计算机基础课程改革新思路 总被引:1,自引:0,他引:1
分析高职高专院校计算机基础教学的现状,结合当前职业教育的办学背景,提出高职高专院校计算机基础教学改革的新思路——工学结合,项目驱动。探讨该模式在职业院校计算机基础教学中,对教学理念、原则、设计及其实施等问题的影响。 相似文献
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本文讨论了操作系统进程并发管理中的同步和互斥问题,并在分析的基础上引入P、V原语,用来描述进程操作。为了说明问题,分别给出了用P、V原语描述进程同步和互斥的典型实例。 相似文献
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This review summarized the recent advances in the utilization of nonmetallic minerals and their applications for fabrication of unfired refractories.The preparation of refractory powder utilizing cheap nonmetallic minerals of zircon,low-grade bauxite and quartz was discussed,respectively.The preparation of three unfired SiC-based refractories:SiC-SiAlON-ZrN,Al2O3-SiC/β-SiAlON/Ti(C,N)-C,and Al2O3-SiC-Si3N4 using the as-prepared refractory powders was introduced. 相似文献
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In order to prolong the service life of castables for hot blast stove pipes,effects of SiO2 micropowder addition and aggregate kind on properties of castables for hot blast stove pipes,and properties of silica sol bonded castables were researched using homogenized bauxite,andalusite particles,andalusite fines,white fused corundum fines,α-Al2O3 micropowder,pure calcium aluminate cement,SiO2 micropowder,and silica sol as starting materials. The results show that:(1) as SiO2 micropowder addition increases,the shrinkage rate of fired specimens increases; BD increases firstly,reaches the highest at 4 mass%,and then decreases; CMOR and CCS of all specimens increase gradually; so the appropriate SiO2 micropowder addition is 4 mass%;(2) the specimens with bauxite aggregate have better CCS and volume stability,but specimens with andalusite aggregate have better thermal shock resistance;( 3) for castables for hot blast stoves using silica sol as binder,the addition of pure calcium aluminate cement can decrease the linear change rate after treatment at 1 400℃ and can slightly enhance CCS and CMOR,but has very little influence on AP and BD; and the introduction of citric acid worsens the thermal shock resistance of specimens. 相似文献