查询词典 ratio

For one-dimension optimization problem, stage pressure ratio and flow angles at the stator trailing edges, solidities at the stator and rotor trailing edges are considered as design parameters, To demonstrate feasibility of the present method, a multiobjective optimization of a six-stage compressor design was performed for maximization of the overall isentropic efficiency and the total pressure ratio, It obtained dozens of reasonable and uniformly distributed Pareto-optimal solutions that outperformed the baseline design in both objectives.

对于一维优化问题，以某六级高压压气机为对象，选取各级的级压比和静子出口气流角以及转子、静子的稠度为变量，得到了几十个在两个目标上均优于初始设计的Pareto最优解。

Taking the tests of the cement slipform concrete construction in Hai nan province, it discusses the selection of the optimum mixture ratio thus acquiring the amount of cement, sand ratio, gradation type and the use of additive.

通过总结海南省公路水泥混凝土滑模施工配合比试验与实践，探讨水泥砼的最佳配合比，以便确定水泥用量、砂率、级配类型、外加剂用量等指标的合理选用。

The grain-leaf ratio showed a periodic oscillation relation to total seedling number in each growing stage, it was decreased with the increasing of total seedling number in earlier winter stage, wintering stage and jointing stage and was increased with the increasing of total seedling number in turning green stage. The grain-leaf ratio was bigger when the total seedling number was 2700000-3200000 plants/hm^2 in earlier winter stage and was 6400000-8200000 plants/hm^2 in turning green stage.

粒叶比与各生育阶段总苗数呈周期性振荡关系，且随着冬前期、越冬期和拔节期总苗数的增加而减小，随着返青期总苗数的增加而增大，当冬前期总苗数在270万320万株／hm^2、返青期总苗数在640万820万株／hm^2时，粒叶比较高。

The sex ratio of the wintering population of Ruddy Shelducks at Lashihai Lake is severe male biased (male: female=1. 44: 1), the paired birds like to distributed in small group, and the degree of biased sex ratio were increased associated with the group size.

配对作为越冬期的一种策略，早期配对的赤麻鸭因具有较高的社会等级而得到了比非配对鸟更多的实惠，特别是当越冬的的食物资源十分有限的时候，配对鸟占有这些有限资源的机会更多。

The working performance and quality index of 3 seeders were determined and the performance indexes such as the eligible ratio and blank-hole ratio of sowing,and the sowing seed number per seedling a...

通过播种机的性能对比试验，测定3种播种机的作业性能和质量指标，综合分析3种机型的播种合格率、空格率、每取秧面积播种粒数等性能指标。

The working performance and quality index of 3 seeders were determined and the performance indexes such as the eligible ratio and blank-hole ratio of sowing, and the sowing seed number per seedling area for 3 seeders were analyzed comprehensively through the comparative test on the working performance of seeders.

通过播种机的性能对比试验，测定3种播种机的作业性能和质量指标，综合分析3种机型的播种合格率、空格率、每取秧面积播种粒数等性能指标。

The ratio of steam to oxygen will affect gas quality and optimum steam/oxygen ratio is 1.5-2 in the test condition.

汽氧比影响煤气组成变化，试验条件下适宜的汽氧比范围为1.5～2。

Using natural frequency ratio and damping ratio as design variables, constructing an objective function with the peak values of dynamic magnification factor and the dynamic magnification area of the main system in the whole frequency band, the optimization problem is built.

建立了以固有频率比和阻尼比为设计变量，以振幅动力放大系数函数的多个峰值和整个宽频带下面积构造目标函数的优化问题。给出了两个自由度减振器参数的优化计算实例。

Optimum extraction conditions were determined as follows, to blade, temperature 80℃, time 2 h, 80% EtOH as extracting solvent, the ratio of solid to liquid 1:10, extracting for three times, the extraction rate of total flavonoids 61.13%; to rhachis, temperature 80℃, time 1 h, 70% EtOH as extracting solvent, stock ratio 1:10, extracting for three times, the extraction rate of total flavonoids 71.71%.

结果表明，在浸提3次条件下，得到叶片总黄酮最佳工艺条件为：乙醇浓度80%、固液比为1：10、提取温度80℃、提取时间2h，在此条件下香椿叶片总黄酮提取率为61.13%；叶轴总黄酮最佳提取条件为：乙醇浓度70%、固液比为1：10、提取温度80℃、提取时间1h，在此条件下香椿叶轴总黄酮提取率为71.71%。

Analysing the general status of the compulsory education resources distribution in Jiangxi province, from three aspects of education investing school condition and teacher staff and six major indexes,such as budgetary expenditure per primary school student and middle school student, budgetary public expenditure per student, schoolhouse acreage per student, value of teaching realia and equipment per student, eligibility ratio of teachers" diploma and ratio of teacher"s intermediate technical post and above, we can induce the problems in the distribution of Jiangxi province compulsory education resources and the reasons consist in the policy of government which results in the problems.

同时，也希望该研究能为省级政府对地方各级政府在推进义务教育均衡发展方面进行督导评估时提供参考和有益的借鉴，从而为推动全省义务教育的均衡发展起到切实有效的作用。本文在研究过程中力求以马克思主义方法论为指导，主要运用文献研究方法。文献研究的优点主要是，研究成本较低，可接触的时间和空间范围广，在较短的时间内可以获得大量的资料，易于做纵向研究和横向研究。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。