不同杀菌剂对当归主要病害的防效及经济效益比较

针对甘肃当归病害逐年加重态势, 采用田间随机区组试验, 分析比较70%噁霉灵WP?50%氯溴异氰尿酸WP和80%代森锰锌WP对当归主要病害防效及经济效益, 以期筛选出最佳防控药剂?结果表明:3种杀菌剂均能不同程度防治当归病害, 其中以50%氯溴异氰尿酸WP 1.86 g/L对褐斑病?麻口病防效最佳, 分别为70.38%~78.75%?84.48%~91.04%, 70%噁霉灵WP 0.34 g/L和80%代森锰锌WP 7.92 g/L次之, 对褐斑病防效分别为59.14%~63.72%?58.14%~62.84%, 对麻口病防效分别为78.61%~83.57%?78.97%~83.57%?50%氯溴异氰尿酸WP 1.86 g/L能很好地抑制当归抽薹, 抑制率达58.63%~63.15%?3种杀菌剂均能明显提高当归药材产量构成因子, 以80%代森锰锌WP 7.92 g/L处理增产增收效果最好, 两年平均增产量高达5 559.91 kg/hm2, 平均经济效益为194 136.65元/hm2, 但投入产出比最低, 为1∶480.63?50%氯溴异氰尿酸WP 1.86 g/L对当归病害防效及抽薹抑制率最高, 投入产出比为1∶634.02, 在此基础上综合考虑病害防效和经济效益, 50%氯溴异氰尿酸WP 1.86 g/L可作为生产上防控当归主要病害的主推药剂?     

甘肃省“121”雨水集流工程经济

甘肃中东部地区地处黄土高原，气候干旱，水资源缺乏，农村人畜饮水困难。“121”雨水集流工程的实施，有效地解决了这些地区的人畜饮水困难。为了客观评价“121”雨水集流工程的经济效益和作用，利用建设项目后评价理论与方法，对工程的经济效益进行了科学评价，国民经济评价结果可行，其结果可用于指导全省雨水利用工程的规划、设计，加强雨水利用工作的决策、管理。     

沙棘木蠹蛾蛹的发育起点温度和有效积温研究

通过室外变温和室内恒温 2种不同的方法对沙棘木蠹蛾蛹的有效积温和发育起点温度进行了测定 ,结果表明 :变温条件下蛹的发育起点温度为 15.4 81°C,有效积温为 2 0 2 .356± 13.0 57日度 ;恒温条件下蛹的发育起点温度为 12 .0 55°C,有效积温为 2 95.2 0 3± 4 .0 94日度。蛹发育的最适温度为 2 1°C     

陆地棉品种间杂种F_2代优势研究及经济农艺性状的通径分析

用７个Ｆ１代具高竞争优势的陆地棉品种间杂种Ｆ＿２代和高产、优质、多抗的品种鄂棉１５（对照）为材料，研究了Ｆ＿２代及皮棉产量等经济性状的竞争优势，又对它们与株高等在艺性状进行了通径分析。结果表明：正确选配亲本，能将高产、优质、早熟综合于一体，多代利用陆地棉品种间杂种。３８４×３６１Ｆ＿２，鄂荆１号（３２４７）×３６１Ｆ２显著优于对照，分别增产１５．４９％、１２．１６％，且纤维长度、早熟性与对照相近，在生产上有很大的利用价值。决定Ｆ＿２代皮棉产量主要是单株铃数、衣分以及它们之间的互作。同一农艺性状对不同经济性状影响程度很不相同，每个经济性状一般都受１～３个主要农艺性状和它们之间，或它们与其他农艺性状互作所制约。在湖北生态条件下，高产、优质、早熟的陆地棉品种间杂种Ｆ＿２代应具备棉抹较高，果位适中而果高偏低，纵横比较大，果枝夹角较小及主茎节距较大等农艺性状     

THE OPTIMAL DECISTON OF ECONOMICAL DEVELOPMENT BY MARKOVIAN DECISION PROGRAMMING

This paper studies the tactics choice and its improvement in the development of economy by means of Markovian Decision Programming. An optimal decision and the maximum expected revenue can be obtained. The . paper also presents the procedures and formulas of numerical evaluation.     

An Estimate on the Casual Relation between Financial Development and Economic Growth

This paper firstly discusses the relationship among money,real interest rate and economic growth of China. Then estimates the causality between financial development and economic growth by Bivariate Granger Casual Relation Test. The conclusion suggests that economic growth stimulate financial development more in China.     

Design of Vision System Based on Service Robot

A vision system based on the service robot is involved. In the system, picture signal is acquired by the picture sensor OV7635. Frame memory AL422B is used as data buffer memory, while CPLD controlled the time order DSP performed. In the software system of image processing, to accomplish color image segmentation and recognition, the threshold vector judgment and improved seed-fill algorithm is introduced, and the image geometric moment is calculated during the segmenting. In order to achieve a vision servo system which composed of image-based feedback and adaptive compensation, the deduced matrix-based Jacobian from the image moment is taken as image feature. Adopted the TFT LCD is adopted to straightly disolav the result of vision recognition and vision tracing.     

APPLICATION OF DECOMPOSITION COORDINATION METHOD OF LARGE - SCALE SYSTEMS AND METHOD OF NONLINEAR PROGRAMMING TO ECONOMIC SCHEDULING OF POWER SYSTEM

In this paper,we discuss a mathematical mode) for optimization of active power dispatch of large-scale hydro-thermal power systems with cascaded hydropower stations. The following factors are taken into account: the variation of the head in the hydropower stations, water transport delay between cascaded stations etc. Using the decomposition-coordination method of large scale systems, we obtain a three-layer-hierarchical coordination system and a three-layer-hierarchical computational structure. We also discuss the computational methods which are used by each hierarchy. We have taken a test computation and analysing the result of an actual hydrothermal power system. The computational results show that it may obtain a satisfactory economic benefit. The paper provides some research work on the economic scheduling of hydrothermal power systems by the decomposition-coordination method of large-scale systems,multiplier method and a new variable metric method.     

论乡村产业振兴

当前,全国上下正在全力推进乡村振兴战略的实施。乡村振兴,产业兴旺是重点。如何实现乡村产业振兴、产业兴旺,这是值得研究的紧迫而现实的重要问题。本文首先从乡村产业振兴在乡村振兴战略中的地位与作用入手分析,对新中国成立70年来中国乡村产业发展的历程进行了简要回顾,并将其划分为4个发展阶段：第一阶段：1949—1977年,传统产业缓慢发展;第二阶段：1978—2000年,乡镇企业异军突起;第三阶段：2001—2011年,新型产业不断涌现;第四阶段：2012年至今,乡村产业绿色“转型”。同时也指出了当前中国乡村产业存在的突出问题,即：产业门类少、生产规模小、产业层次浅、产业链条短、生产效率低、特色产业弱、品牌产业缺、产业环境差、产品质量低和缺乏竞争力。最后,针对上述存在的问题,提出了实施乡村振兴战略、实现乡村产业振兴要遵循的6大原则和10项具体措施,以期为推动实施乡村振兴战略做出积极贡献。     

固定式喷灌系统喷头经济压力的研究

在能源危机的冲击下，节能已成为广大喷灌工作者共同关心的问题。降低喷灌系统工作压力是节能的主要方法之一，而喷头的工作压力与喷灌系统工作压力紧密相关。本文提出了固定式喷灌系统喷头经济压力的概念及其确定方法，并将此法运用到实例中。在选择经济、合理的喷头及其经济工作压力方面做了有意义的探讨。