模糊相似优先比在内蒙引种区划中的应用

以内蒙周边各省主要城市以及内蒙九盟三市近十年的气候资料为基础，选取均降雨量，年均温度、相对湿度、极端高温、极端低温五个气候要素为相似因子，用模糊相似先比区划出了内蒙各主要地区引种驯化容易成功的序列。     

基因型同质试验单元较少的几种设计

根据特种设计的基本原理 ,介绍了用混杂设计、平衡不完全区组设计以实施基因型同质试验单元较少而处理数较多的试验。这两种设计的基本特点是采用混杂的原理缩小不完全区组的大小 ,使较少的基因型同质试验单元可安排一个不完全区组所需的处理。并各列举了 1个畜牧方面的试验演示其分析过程。     

Calibration of Gypsum Blocks for Measuring Saline Soils Moisture

The proper management of irrigation requires an accurate measuring of soil moisture. One of the commonly applied methods for measuring soil moisture is the use of gypsum blocks – a method that is simple and quick to apply. However, measuring moisture in saline soils using this method is prone to errors due to the effect of soil salinity on the block. In this study, the effect of different salinities (1, 2, 6, 10, and 18 deci Siemens per meter (dS m^?1) on the measurements of a gypsum block type 5910 A was investigated with two repetitions in random blocks in sandy loam, loam, and clay loam soils, and corrective functions were obtained using multivariate regression for all soils with different salinity levels. The results showed different trends for measuring the soil moistures for salinities 1–6 dS m^?1 compared with salinities 10–18 dS m^?1, and the corrective functions in salinities 1–6 dS m^?1, which had higher accuracies than those with salinities 10–18 dS m^?1.     

Analysis of Radial Forces on the Seal Block in a Compound Gear Pump with 3 Idle Gears

By analyzing the pressure distribution between gears and sealing blocks in compound gear pump with three idlers,the resultant hydraulic forces acting on seal blocks are obtained.The conclusion is the unbalanced resultant hydraulic forces are relatively small in magnitude.In the pump,the inner sealing edges are long and so it s Sealing effect is good,but the outer sealing effect is relatively poor because of its short sealing edges.The little unbalanced force pushes the sealing block to te pumping chamber,therefore it is advantageous to meliorating the pump's sealing effect,thereby to improving it's volumetric efficiency as well.     

三因素随机区组试验结果统计分析的BASIC程序

本文提供了三因素随机区组试验结果统计分析的 BASIC 程序,可进行方差分析、计算标准差、判定差异显著性。该程序输入输出方式简单,容易掌握。     

作物育种品系试验四种分析方法比较

用水稻、小麦和大豆的8个三重复品系试验的产量结果, 进行了作物育种品系试验的三种分析方法与随机完全区组分析(RB)的比较. 此三种分析方法分别是, 行列区组分析(RC)、行列区组及近邻小区分析(RCN)和行列区组及以小区丛数为协变量的协方差近邻分析(COV). 结果表明, 以误差均方作为相对效率指标, RC、 RCN、 COV相对于RB的平     

加拿大一枝黄花燃烧块燃烧特性试验研究

对不同压力和温度下压制的加拿大一枝黄花(Solidago canadensis L.)燃烧块的燃烧特性进行了试验分析。结果表明,不同压力压制的燃烧块其燃烧效率差异显著;不同温度下压制出的燃烧块其燃烧效率差异极显著,燃烧时间和无焰燃烧温度差异显著;不同压力、温度及两者的交互作用与各指标间的差异均不显著。经多重比较,各种压力下,60℃压制出的燃烧块是最优的,可以为用户提供优质的燃烧块。同时,压制燃烧块过程中,加温不应超过70℃,否则燃烧块的燃烧特性会明显变差。     

一种新式护坡——模压混凝土砌块护坡

在对传统护坡型式缺陷进行分析的基础上,介绍了一种新式护坡—模压混凝土砌块护坡,通过对其生产工艺、施工工艺以及优点等方面的阐述,说明该护坡系统有良好应用前景。     

关于建设居民食用农产品供应风险防御机制的思考

新型冠状病毒感染肺炎疫情带来的风险给居民生活必需农产品的有序供给造成影响,由黑天鹅和灰犀牛理论引发出关于建设居民食用农产品供应风险防御机制的思考,在风险发生的不同时段通过区块链、物联网等新兴数字技术对其进行分析,充分依托数字化农业保障民生、维稳社会秩序。