LiCl溶液-空气吸收物系相平衡线的绘制及应用

以液体除湿空调系统中使用的吸湿性LiCl盐溶液和待处理空气组成的吸收体系为研究对象,分析等温及绝热吸收过程中吸收系统的相平衡关系并绘制相平衡线,以便作为设计填料吸收塔的基础。结果表明等温吸收相平衡线仅受进塔溶液温度的影响,绝热过程受浓度的影响更大。绝热吸收过程中水蒸气的凝结潜热和溶液的微分溶解热等热效应导致气液传质势差迅速降低,因而无须使用过高的填料高度。在利用绝热吸收相平衡线确定所需吸收溶液流量时,仅由全塔物料衡算得出的溶液流量偏小,应同时考虑热平衡关系才可得出较为合理的溶液流量。     

玉米施用高塔复合肥研究初报

对吉林省榆树市东部的低矮起伏丘陵台地区施用高塔复合肥的适宜用量进行了研究。结果表明:小区试验洋丰牌高塔复合肥的适宜施肥量为500～600kg·hm-2,同时提出了高塔复合肥在生产中应用的配套技术措施,强调良种和良法的有机结合。     

ArcGIS可视域分析在瞭望台管理中的应用

利用ArcGIS地理信息系统平台,结合空间分析的建模理论,以广州市白云山SPOT卫星影像图和全要素数字图数据为材料,阐述了可视域分析的过程,得出了遥感影像和数字化地形图相结合进行可视域分析的方法,输出的通视图清晰直观,为广州市森林防火信息系统瞭望台管理提供了可靠的基础决策信息。     

林业专用吊运车的设计研究

介绍了专利“林业专用吊运车”设计原理、机体结构与技术方案，并与当前国内外同类机械在主要技术参数、效益、市场竞争力等方面做了比较。结果显示：林业专用吊运车具有机体小、能耗低、多功能于一体，适合苗圃作业，起重量适用大苗等优势，实现了林地或苗圃地大苗出圃运输机械化，对苗木移植机械化起到了积极地推动作用。     

基于ArcGIS三维分析的岭南八局森林火险治理二期工程瞭望塔布设研究

结合ArcGIS扩展模块3D Analyst三维分析功能,对岭南八局森林火险治理二期工程瞭望塔布设进行研究,创建动态三维模型,从而更好地实现地理数据的可视化和分析处理,为防火工程瞭望塔布设提供一个科学的方法。     

Quantitative analysis of damage extent of transmission tower by using strain energy method

In order to solve the structural damage identification problem of transmission tower, a two-step identification method based on change rate and dissipation rate of modal strain energy is proposed. The damage location is identified by the change rate of modal strain energy method. Then, the modal strain energy dissipation rate theory is analyzed further by using the element stiffness matrix after injury. As a result, a more accurate damage quantification equation method is introduced. This method requires only several modals of vibration. The numerical simulation results show that this two-step method can find the damage location and damage degree of transmission towers effectively.     

塔架压杆模型及临界荷载计算

从塔架压杆的稳定计算出发，介绍了一种具有弹性支承的压杆模型，并对其临界荷载进行了计算，其结果较以往模型准确、安全性好，可供相关设计选用。     

Model Analysis of Tower Crane Structure Based on ANSYS

In this paper,a complete dynamic model of the tower crane is set up by the finite element software ANSYS and then the QTZ25 tower crane model is calculated.Through comparing the results,the feasibility of this method is proven.This method is a new approach to fast and precise analysis on dynamical model of tower crane structure.     

Analysis of Buckling Bearing Capacity for Super-Large Cooling Towers Subjected to Random Wind Loading

Based on the formal solutions of the buckling eigen equation,the probability density evolution equation for the random buckling eigenvalue is derived considering the random wind loading.Taking the averaged wind speed at 10m height and roughness length as the random factors,the random buckling bearing capacity for a super-high cooling tower is then analyzed.Furthermore,both the mean and the standard deviations of the capacity are calculated.It is indicated that there exhibits a general shape for the probability density function of the random buckling capacity.And the mean of the random buckling bearing capacity is close to that one computed by the averaged parameter.However,the variation of the random buckling bearing capacity is between the corresponding values of averaged wind speed at 10m height and roughness length.     

南方地区林火视频监控系统设计--以石柱县森林火灾高风险区为例

以重庆市石柱县森林火灾高风险区为例,从前端监控、网络传输、监控中心等环节入手,立足南方地区森林防火的实际,以案例形式构建了一套林火视频监控系统,尤其是通过“以租代建”整合了铁塔资源和取代传统微波传输模式,以期为林火视频监控系统的规划和建设提供参考。