小径材六棱柱体精准成型机的设计

为合理开发利用我国丰富的小径材资源,提高其利用效率,研究设计了小径材六棱柱精准成型机。该成型机主要由工作台、侧面压紧机构、送料机构、切削机构以及床身等部分组成,可用来对小六棱柱体毛坯件进行精准成型加工,得到尺寸精度高、表面质量好的小六棱柱体,为生产大断面六棱柱体集成材提供原材料,满足生产大断面六棱柱体集成材需要。     

电力线路改造作业模式思考

以电力行业线路改造工程为研究对象,详述了500kV线路改造测量的全过程,探讨了以RTK技术和TOPCON免棱镜全站仪相结合的野外作业方式提高数据采集的速度,对架设仪器时的"挑直线"原理进行了深入分析,并论述了相应的实际操作方法。     

Assessment of soil erodibility and aggregate stability for different parts of a forest road

We measured erodibility and mean weight diameter （MWD） of soil aggregates in different parts of a forest road. Samples of topsoil were collected from cutslope, fillslope, road surface and forest ground to assess the texture, bulk density, moisture, CaCO3 and organic matter. Soil aggregate stability was determined by wet sieving. Soil erodibility on the road surface was 2.3 and 1.3 times higher than on the fillslope and cutslope, respectively. The forest soil had the lowest erodibility. Aggregate stability of cutslope and road surface were low and very low, respectively. There was a significant negative relationship between cutslope erodibility with CaCO3 and sand content. Cutslope erodibility increased with increasing silt, clay and moisture content. On fillslopes, MWD increased with in-creasing rock fragment cover, plant cover, litter cover, organic matter and sand. There was a strong negative correlation between fillslope erodibility and organic matter, sand and MWD. There was no significant difference between erodibility of bare soil and soils beneathRubus hyrcanusL. and Philonotis marchica （Hedw.） Brid.     

棱柱体截面几何和力学特征量的规则算法

从对一个顶点在坐标原点的三角形几何特征量计算出发，提出计算棱柱形结构体截面几何特征量和力学特征量的规则计算方法。几何特征量包括面积、面积矩和惯性矩；力学特征量包括重量、静力矩和转动惯量。它较之习惯算法，规则算法适用性广和便于计算机运算。     

Real-Time Estimation of Citrus Canopy Volume Based on Laser Scanner and Irregular Triangular Prism Module Method

【Objective】Accurate measurement of volume and structure of fruit tree canopy can provide important reference for variable application of pesticide and fertilizer, as well as yield estimation. In order to accurately measure the canopy volume, a scanning platform based on laser sensor (LMS111-10100, SICK) was built. Aiming at the problem of irregular canopy shape, the poor accuracy of the existing real-time measurement methods of canopy volume and difficult to measure and estimate the canopy volume, a new estimation method based on irregular triangular prism modules was proposed in this work. 【Method】Five spherical landscape trees with regular canopy and ten citrus trees with irregular canopy were scanned by the laser sensor at the speeds of 0.5, 1.0 and 1.5 m·s ^-1, respectively. The canopy volume was measured by two methods: cuboid module method (CMM) and irregular triangular prism module method (ITPMM), and the error analysis was conducted based on manual measurement. 【Result】 The results showed that the error ranges of CMM for measuring landscape trees at the different speeds of 0.5, 1.0 and 1.5 m·s ^-1were 4.17%-6.59%, 4.56%-7.42% and 4.17%-9.86%, respectively, while the error ranges of the ITPMM for measuring landscape trees were 2.37%-4.63%, 3.18%-5.00% and 4.10%-5.73%, respectively. The distance range of the relative error of the two methods for measuring citrus trees was -0.28%-4.22%%, and the average difference was 1.78%. The error ranges of CMM for measuring citrus trees at the different speeds of 0.5, 1.0 and 1.5 m·s ^-1 were 11.63%-31.02%, 11.88%-33.23% and 13.28%-33.30%, respectively. The error ranges by ITPMM for measuring citrus trees were 3.25%-6.69%, 4.50%-8.31% and 5.66%-11.55%, respectively. The distance range of the relative error of the two methods for measuring citrus trees was 6.43%-26.20%, and the average difference was 13.04%. 【Conclusion】 The research showed that the estimation error of the ITPMM was significantly smaller than the CMM. For the same target, when the speed was 0.5 m·s ^-1, both of the estimation accuracy for the two methods were the highest. As the sensor speed increased, laser scanning points on the canopy decreased. So, the relative error of volume estimation increased with increase of advance speed of the laser sensor. When scanning the regular target, the accuracy difference between the two methods was small; when scanning the irregular target, the error of the CMM was larger. The processing time of a frame laser data by the CMM was 2.86 ms, and the processing time by the ITPMM was 4.73 ms, which were less than the scanning period of 20 ms of the laser sensor. The data processing time could match the acquirement of real-time collection and processing of laser data.     

钢制四方台型人工鱼礁礁体设计及稳定性研究

针对台州大陈海域的波流状况、水深等设计了钢制四方台型礁体。礁体的基本尺寸为底座3.5m×3.5m×0.3m,顶面2.5m×2.5m,高3.5m,重7.19。t根据波流动力学理论对此礁体在实际投放海域所受到的最大作用力、抗漂移系数以及抗倾覆系数等进行了计算。结果表明,该钢制四方台型礁体在波流共同作用下的最大受力为32255N,作用力矩为48642 N.m,抗漂移系数和抗倾覆系数分别为1.44,2.23。与礁体受到的静摩擦力、重力矩相比,满足礁体稳定条件,即礁体在海底不会发生滑移或翻滚。     

基于绩效棱柱和模糊综合评价法的西部旅游地区游客满意度评价模型的构建——以云南丽江为例

从地方性知识利用与保护入手,以绩效棱柱为框架,建立游客满意度评价指标体系,利用AHP层次分析法确定指标权重,最后以模糊综合评价法对调查结果进行模糊评判,构建西部旅游地区游客满意度评价模型,并进行案例研究。以云南丽江为例,根据AHP层次分析法,以专家打分为主,求得绩效棱柱5维度权重及各KPI权重和一致性,对游客满意度进行模糊评价。结果表明,云南丽江地区游客满意度总体为＂满意＂,但其中还存在一些问题,主要针对地方性知识利用与保护方面,提出了相应的改进措施,以利于云南丽江旅游业更好的发展。     

日光光谱的计算机重现与仿真

将日光的可见光谱均匀分割为2000份色光,并计算了各色光的RGB值。以2000份色光为光源,基于Matlab软件重现了标准日光光谱,仿真了日光光栅光谱及日光棱镜光谱。结果表明,重现与仿真的日光光谱,色彩连续、细腻而逼真,可应用于与日光光谱相关的研究与应用领域。     

绩效棱柱在新绩效预算中的应用分析

新绩效预算的评价工具有多种,然而,传统评价方法并未全面考虑各利益相关者与新绩效预算政策的相互作用和影响,忽视了其他利益相关者的重要性.借鉴绩效棱柱模型,重构适合新绩效预算制度的绩效管理体系,应从只关心一个或两个利益相关者的观念中转变过来,关心新绩效预算制度产生结果的所有利益相关者,在从利益相关者那里得到的贡献同时,也要关注利益相关者的满意,达到新绩效预算的战略、流程、能力的匹配.     

棱镜光导管采光技术在设施养殖中应用的探讨

光导管采光技术是利用太阳光能的一种方式,为实现高效率传输光能提供了途径.阐述了棱镜光导管采光技术的结构和原理,列举了棱镜光导管采光技术在密闭式鸡舍的安装和应用.将该技术引入设施养殖领域,为其提供充足的天然光线照明,以达到节能减排的目的.