共查询到19条相似文献,搜索用时 109 毫秒
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文章拟改变现有的湿式球磨机需设置运行维护平台的传统布置方式,降低磨机中心标高1.5~2.2 m,不设平台、方便运行维护,并达到降低厂房高度和提升机高度的目的,相应节约投资和厂用电。 相似文献
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We present the results of investigations carried out during the development of steam turbine condensing systems comprising a condenser, an air removing device, and condensate and circulation systems. It is found that the tube bundle layout and the characteristics of devices for removing noncondensable gases have an essential effect on the heat transfer intensity and pressure in the condensers. The design of the heat-transfer surface of a condenser operating with constant velocity of steam during its condensation is described, and the procedure for calculating the area and configuration of such heat-transfer surface is outlined. Results from tests of such apparatuses are presented. It is shown that the heat-transfer coefficients in them are a factor of 1.5–3.0 higher than those in the existing condensers at a moderate velocity of cooling medium. A qualitative pattern of a change in the volume filled with noncondensable gases that occurs during a decrease of thermal load or drop of cooling medium temperature is shown taking as an example condensers with steam flowing inside the condenser tubes. 相似文献
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传统的机场噪声感知存在成本高、环境要求高、稳定性差、维护成本高,系统可扩展性差等问题,为此提出了一种基于ZigBee的新型机场噪声感知模式。该模式将成本低廉的传感器节点按密集非均匀的泛网格状布置于机场内部及围界,提出了一种适用于新型机场噪声感知模式的泛网格化感知节点布局优化方法,并通过一系列实验分析确定了新型机场噪声感知模式中 ZigBee 感知节点布局方案。并将得到的布局优化方案应用于天津滨海国际机场,实地验证的结果证实了新型感知模式和泛网格化布局方法的实用性与有效性。 相似文献
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W. Robert Daasch Martine Wedlake Rolf Schaumann Pan Wu 《International Journal of Circuit Theory and Applications》1992,20(3):267-282
To exploit the increased circuit density available in current technologies for continuous-time (c-t) systems, it is proposed to extend the range of analogue design automation to the larger c-t subsystems, specifically filters, commonly found in communications, mass storage devices and other interfaces to real-world signals. the synthesis is based on LC ladder simulation using only transconductances and grounded capacitors (TGC). the method retains many of the characteristics of digital design automation and therefore allows a direct mapping of these techniques. the TGC approach is shown to require a minimum of component types which are ideally suited to integration in MOS, bipolar or GaAs technologies. A simple example for the automation of c-t filter designs as well as results of CMOS c-t filters are included to demonstrate the viability of this approach. Related and equally important areas addressed are tuning, compensation for parasitics and scaling. 相似文献
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Albert Seidl Thomas Schnattinger Andreas Erdmann Hans Hartmann Alexandr Petrashenko 《Journal of Computational Electronics》2006,5(4):381-384
A module for efficient extraction of maximum current densities from the layout has been developed and implemented within the
CAD package PARIS. The corner-rounding dependence on technology parameters, such as numerical aperture and acid/base diffusion
length, was simulated. A combination of classical and meshless FEM was used to obtain accurate results taking the simulated
realistic shapes of the corners into account. 相似文献
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传统固定翼无人机纵向控制系统的耦合度较高,这是由于升力的改变必须通过机体姿态变化得到。本文根据某鸭式布局无人机模型设计了经典直接升力控制律,实现了飞机飞行轨迹和姿态之间的稳态解耦,提高了高度控制通道的动态响应,并且采用副翼同时同向偏转的方式提供了更大的直接升力,获得更快的纵向系统响应。提出了采用显模型跟踪解耦系统设计无人机直接升力控制系统方案,实现纵向位置控制和姿态控制动态解耦,仿真结果表明,本文设计的显模型跟踪解耦系统解耦性能较高,并且对于气动参数摄动具有较强的鲁棒性,位置控制和姿态控制的动态性能良好。 相似文献
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O_2/CO_2燃烧方式下锅炉机组总体布置研究 总被引:1,自引:0,他引:1
基于前人对O2/CO2燃烧方式下煤的着火及火焰稳定性、碳的燃尽率、NOX与SOX及痕量元素的排放特性、传热特性、烟气的组成等得到的实证研究,从设计的角度,阐述了燃煤发电锅炉在O2/CO2燃烧方式下的总体布置及各个部分设计时应注意的问题. 相似文献