In order to better design and study the air-suction cylinder precision seeder, especially the influence of the suction radius to the air-suction cylinder seeder’s performance, it is theoretically analyzed and deduced, and its mathematical model is found.
为了更好地设计气吸滚筒式精密排种器,研究吸孔的吸种半径对播种性能的影响,对其进行了理论分析和推导。
In the study,the whole seeds was taken as CK1,the half-seeds without sand cover as CK2 and the other half-seeds vere covered with the 1cm,2cm,3cm and 4cm thick layers of sand,respectively.
为了加快玉米品质育种进程,在作物育种中往往将种子横切为两半,用带胚的半粒种子进行繁殖,不带胚的半粒种子用于品质分析,便于优质品种选育。
α-Congruences on Variants of S(X) (Ⅱ)α-Congruences;
S（X）的变种半群的α同余
Relationship between the congruences on a variant T(X,θ) of an α--semigroup T (X) and the T￣θ--equivalences on X is discussed and the smallest proper congruence is determined for some variants T(X,θ).
本文讨论了α半群Ｔ（Ｘ）的变种半群Ｔ（Ｘ，θ）的同余与集合Ｘ上Ｔ~θ等价关系之间的联系并确定了某些变种半卒群Ｔ（Ｘ，θ）上的最小真同余。
Effect of Sand Layer Thickness on Seed Germination of Maize Half-seed
覆砂厚度对玉米半粒种子发芽特性的影响
Giant particles are mainly particles detached from the surface.
巨粒子多半是从表面分离出来的粒子。
An Extended Kalman Particle Filtering Algorithm for HRG-Based Strapdown Inertial Attitude Determination System
基于半球谐振陀螺的捷联惯性姿态系统的一种粒子滤波方法
Peel eggplant and onion. Dice. Wash mushrooms and cut each into two. Wash tomatoes and dice.
茄子、?去皮切粒﹔菇洗净切半﹔茄洗净切粒。
but as quantised particles with electronic properties being size- dependent and molecular rather than solid - state in nature.
整体上也不再具有半导体性质，而是成了一种量子化的粒子和分子，其电子特性随其尺寸而变。
A discrete particle, such as a photon or an electron.
微粒有某种特性的微粒，如光子或电子
Shot Noise in Diluted Magnetic Semiconductor/semiconductor Quantum Wires
稀磁半导体/半导体量子线中的散粒噪声
Preparation of semiconductor ZnS nanoparticles with microwave irradiation;
微波辐射加热制备半导体ZnS纳米粒子
Research progress and application of moving-particle semi-implicit method
移动粒子半隐式法的研究进展及应用
Radiative Property of Semitransparent Spherical Particle With Multilayer Structure
多层结构半透明球形粒子的辐射特性
Molecular Evolution and Phylogeny of Some Species of Pentatomidae (Hemiptera: Heteroptera) Inferred from COⅡ Gene Sequence;
蝽科部分种类线粒体COⅡ基因分子进化与系统发育研究（半翅目：异翅亚目）
tain form one to five seeds
豆荚含1-5粒种子
A particle should be accompanied in nature by a sister particle.
一种粒子实际上必须伴随一种姐妹粒子。
This particle has to be in equilibrum with the gas of pellets.
这种粒子必然与这种微粒气体处于平衡之中。
A grain or seed, as of a cereal grass, enclosed in a husk.
子，粒如谷类禾本植物的包在壳里的谷粒或种子
Particle swarm optimized extended kalman particle filter algorithm
一种粒子群优化扩展卡尔曼粒子滤波算法
The method of calculating the atomic radius and positive ionic radius of metal;
一种计算金属原子半径和离子半径的方法
Test procedures for semiconductor charged particle detectors
GB/T5201-1994带电粒子半导体探测器测试方法