排序方式: 共有11条查询结果,搜索用时 15 毫秒
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用瞬时法测定 2 5℃下 Na Cl和 H2 SO4 水溶液的导热率 ,并用 4个已知导热率的标准物质标定了装置 ,平均误差小于 1 % ,实现了用计算机自动完成数据采集和处理。该方法快速 ,便捷 ,测量时间为 1 s,是快速分析混合物组成的有效方法。 相似文献
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在加权调和平均(WHA)算子的基础上,提出了信息数据集结的有序加权调和平均(OWHA)算子和组合加权调和平均(CWHA)算子,探讨了它们的一些性质关系,给出了OWHA算子和CWHA算子应用于多属性决策的方法,最后通过实例分析表明该决策方法是有效和可行的. 相似文献
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Humanoid walking planning is a complicated task because of the high number of degrees of freedom (DOFs) and the variable mechanical structure during walking. In this paper, a planning method for 3-dimensional (3-D) walking movements was developed based on a model of a typical humanoid robot with 12 DOFs on the lower body. The planning process includes trajectory generation for the hip, ankle, and knee joints in the Cartesian space. The balance of the robot was ensured by adjusting the hip motion. The angles for each DOF were obtained from 3-D kinematics calculation. The calculation gave reference trajectories of all the DOFs on the humanoid robot which were used to control the real robot. The simulation results show that the method is effective. 相似文献
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N-acylaminoacid amido hydrolase(EC 3, 5, 1, 14)是含锌金属酶,每摩 尔酶蛋白含两摩尔Zn2+。本实验通过金属螯合剂EDTA对酶透析脱去酶中的锌离子, 生成不含金属离子的apo-酶,再分别以 Mn2+, Ni2+离子对 apo-酶重组,生成相 应的金属离子取代酶,研究了它们的活力与pH值的关系,热稳定性,游离的金属离子 对酶活性的影响,并通过荧光发射光谱考察了相应构象的变化。 相似文献