杆

This thesis also improves the algorithm of iterative calculation of direct kinematics on two aspects. One is to solve the "floating" problem, which is the change of the leg lengthes when nuts of ballscrews rotate around their own axises.

通过对几类关键受限变量——杆长、关节摆角、倾倒角和旋转角进行相关运动学计算，实现对它们的限位约束；同时，针对因滚珠丝杠螺母副引起的杆长随角度变化而&浮动&的特殊问题，对正向运动学迭代算法进行改进，加快了收敛的速度； 3。

Effect of acid soil on dry matter accumulation and Al and nutrient contents of barleys differing in acid soil toleranceThe experiment was conducted by using 10 barley genotypes with different acid soil tolerance at seedling stages, each 5 genotypes for acid tolerance and sensitivity, to determine the difference in biomass accumulation, Al and nutrient content in the roots and shoots among genotypes under the condition of acid soil stress.

低pH和两种铝处理下植株各器官ca、Mg含量，茎杆和叶片P、K含量，叶片Fe、MO、Zn含量以及茎杆Zn、B含量和根系及叶片Mn含量均降低，铝福复合处理时降幅更大。100林MAI处理，大麦幼苗整个试验期间根系分泌的苹果酸、柠檬酸和唬拍酸含量与对照相比均增加，且耐铝基因型增幅大于铝敏感基因型，表明铝诱导这些有机酸分泌量增加可能与品种耐铝性有关。

The results show that the most engineering practical columns behave like the interaction of local buckling and overall buckling, and local bucklings of plates do not mean the lost of carrying capacity of overall structures at once.

用本文提出的有限条塑性系数增量初应力法分析了钢偏心压杆局部与整体相关屈曲的极限承载力，得到了中截面的屈曲模式，表明大部分的工程实际的压杆均表现出明显的局部屈曲与整体屈曲的相互作用，板件局部屈曲，并不意味着结构整体立即丧失承载力。

I put one of these "quads" together and took it to the crags for testing.

我拿一组「Quads」到岩场试用，这组弹簧驱动的活动凸轮，用高张力螺丝连结一起，然后用一根铁杆当连接杆，当然这是没有制动机构的。

All along the shaft of the arrow slender whorls, curlicues, and dots were pressed into the wood with infinite care.

箭杆上，全部都是纤细的螺旋、花饰，还有圆点，非常精致地雕刻在木杆上。

This paper presents a new analytic approach to synthesize the spherical four-bar mechanisms with two prescribed coupler curve cusps, and to analyze the motion type of the generated mechanisms.

本文提出一新的解析法来合成具两特定尖点耦杆点曲线之球面四杆机构，并详加讨论所合成出之机构的运动型态。

This is a short par 4 that is driveable by the long hitters, however an iron off the tee is the smartest shot.

在短四洞中、无论用木杆还是长铁杆开球都是可行的。

These years, novel screw is used increasingly in the field of plastic, and most of extruders are equipped with all kinds of screws in some developed countries.

近年来，新型螺杆在塑料行业的应用越来越广泛，国外的大部分挤出机都已经装备了各种新型螺杆。

It offers a scientific foundation and analytical means to optimize the design of single screw extruders and control processing parameters for attaining ideal products through the simulation.

通过对单螺杆挤出机的仿真，可以为优化单螺杆挤出机的设计和控制加工过程以获得理想的产品提供科学依据和设计分析手段。

The plastic go down the hopper smoothly and is gripped by the thread of the screw. It is forced to go toward the direction of the gear end along with the rotation of the screw. A mechanical transferring process is formed. During the running of the plastic from the feed port to gear end, a high pressure is formed in the process of plastic curing due to the gradual decreasing of the thread depth and the resistance of filter gauze, splitter plate and gear end. The high pressure helps to press the raw material and improve its heat conductivity performance and the quick melting of the plastic, at the same time, the gradual increasing pressure can help the gas which is among material particles exhausted from the air holes.

在压力升高的同时，塑料一方面被外部加热，另一方面塑料本身在压缩、剪切、搅拌的运动过程中，由于内磨擦力也产生了大量的热，在外力和内力的联合作用下，塑料温度逐渐增高，其物理状态也经历了玻璃态--高弹态--粘流态的变化，一般地说来，在加料段中主要是玻璃态，在螺杆螺纹逐渐减少的中间部分压缩段中，物料主要处于高弹状态，同时也逐渐的熔融，而物料到压缩段后部和化段作用处于粘流态了，这时我们称塑料已完全塑化了，由螺杆推力作用将塑化的塑料定压定量的从机头中挤出。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。