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以新田煤矿供配电系统智能化改造作为研究对象,对当前新田煤矿供配电系统运行的现状进行了分析,研究了当前系统运行中存在的短板,指出自动化程度低、专业应用多、数据和信息分散、信息资源利用程度低是当前系统运行中存在的主要问题。重点对新田煤矿供配电系统智能化改造进行了全面研究,设计了新田煤矿供配电硬件系统和软件系统,取得了较好的供配电智能化控制效果。 相似文献
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一、概述电子计算机的广泛采用,给实验室的现代化开辟了广阔的前景。用计算机装备和改造实验室的实验仪器和设备,使之智能化、数字化,可以使试验方法更先进、更合理,数据更准确。 相似文献
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全国森林资源数据标准化技术实现和示范应用 总被引：1，自引：0，他引：1
为解决全国森林资源数据库系统建设工作中存在的各省森林资源数据库在技术选型、编码体系上不一致而导致的共享交流问题,提出全国森林资源数据标准化技术路线。利用开发的标准化工具实现了12个试点示范单位的森林资源数据标准化整合改造,为国家和省之间森林资源数据上下贯通奠定了基础,同时也为各省建立新一轮二类调查成果数据库提供示范经验和技术解决方案。 相似文献
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随着科技水平的不断提升,木材加工机械制造逐步实现现代化,并且逐步向智能化方向发展。智能数控技术在木材加工机械中的应用,使木材加工精细化程度得到明显提升。论述了国内外木材加工设备智能化发展概况,分析了木材加工智能数控机械自动化改造难点,基于此,提出了木材加工智能数控机械自动化改造措施。 相似文献
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王传立 《中南林业科技大学学报(自然科学版)》2011,31(1)
为了提高视频点播学习平台的开发效率和软件性能,利用正交软件体系结构风格重构了视频点播学习平台的体系结构。开发实践表明,正交软件体系结构提高了学习平台的灵活性和可扩展性,降低了平台的开发和修改工作量。 相似文献
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在当前电话已经成为我们日常生活非常重要的工具。虽然我国电话普及率逐年提高,但盗打现象依然存在。本文仅从电路原理方面分析一下电话线路的防盗控制方法和途径。 相似文献
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D. W. van der Zel 《Southern Forests》2013,75(1):26-27
The performance of various creosoted telephone poles after 38 and 22 years' service in the line is given. The suitability of species for poles based on the present investigation, strength and other characteristics, is discussed. 相似文献
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Social network analysis, focusing on the role of interpersonal relationships on the flow of information, trust, and service delivery, is increasingly recognized as a valuable approach to understanding landowner behavior. Landowner personal networks are central to Diffusion of Innovations theory and the Theory of Planned Behavior, both of which are commonly invoked in the design of interventions to encourage sustainable private forest management. However, personal network data can be difficult to obtain for a large sample. We tested the effect of three different personal network name generators on estimates of Minnesota landowners’ forestry information networks: a list of generic alter categories, an open-ended written survey, and a combination of written survey and follow-up telephone survey. Generic network data provided a relatively accurate baseline. Personal network data from a written survey provided more detailed data but underestimated network diversity and failed to account for potentially influential weak ties. A combination of written and follow-up telephone survey both doubled estimated average network size from 2.8 to 5.5 alters and increased estimated network diversity from 2.3 alter categories per respondent to 3.7. Network data from the written survey revealed a bias in favor of strong ties that was largely overcome through additional prompting during the telephone survey. A combination of written surveys and telephone or in-person interviews may be the best strategy to balance the benefit of a large sample with the cost of more intensive, yet more reliable, data collection methods. 相似文献
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以MapObjects和Visual Basic.Net为基础,通过分析福建省野生动物样带调查数据的记录信息,运用直线方程,将原本只有记录样带起点与终点坐标的调查数据进行GIS化处理,实现了从信息管理向GIS的转变。GIS处理后的野生动物分布数据具有了空间特征,更加符合野生动物分布实际,为以后相同或相似的资源调查提供了GIS处理的技术参考。 相似文献
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建筑构造变异和形体关系处理已不再是当今建筑界的关注焦点,人们更多将目光放在一个更持续睿智的建筑方式:发展集绿色建筑材料与建筑技术于一体的生态建筑。将材料和技术的应用与建筑美学予以统筹考虑,在实现技术合理性的理性审美标准同时,综合兼顾建筑美学的感性层面。 相似文献
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A simultaneous estimation procedure for the parameters of two functions, i.e., the maximum size–density line and the self-thinning
curve, is presented to predict stand development for fast-growing tropical species. This procedure assumes that the rate of
periodic reduction in stand density with increasing quadratic mean diameter on a logarithmic scale (r) will increase inversely proportionally to the distance from the maximum size–density line and consequently equals the slope
of the line at distance 0. Under this assumption, the maximum size–density line can be incorporated into the self-thinning
curve to form an integrated equation with three parameters: k and m, the slope and constant of the maximum size–density line, and a, the rate of reduction of r of the self-thinning curve. These parameters are estimated simultaneously using measurement data on stand density, quadratic
mean diameter, and the corresponding r. This procedure was evaluated by application to two data sets: 186 measurements of Acacia mangium and 95 measurements of Paraserianthes falcataria, for which the parameters k and m have previously been calculated. The parameters estimated using this procedure were in good agreement with previous ones
based on the A. mangium data set, and the differences found for the P. falcataria data set were also small, within the error variances. Therefore, it is concluded that the proposed procedure would give almost
the same estimates from a single calculation step as the previous procedure that required two separate calculation steps. 相似文献