经验曲线

The results of morphological observation and measurement of middle arc curve of outside mandibula in 95 Chinese adults(male 50, female 45)are as follows:The curve is approximately a parabola and k(male 0.02861+0.0007,female 0.03055+0.0005) in formula(Y=KX~2)is calculated by means of liner regression.

线性回归法得相关系数r≥0.95，计算曲线经验公式Y=KX~2的系数，男性0.0286±0.0007、女性0.03055±0.0005。此线与&下颌骨外侧下弧线&和&下颌骨外侧上弧线&的K值比较有显著差异(P.05)。

In order to predict the post-construction settlement, based on a thorough analysis on the law of settlement development, citing the Verhulst model which good reflect its main characteristic, using the curve fitting method, mining the information contained in the construction data; betakes the improvement non-linear fitting algorithm on the model parameter inversion.

目的 为提高软土路基的工后沉降量预测精度，给设计和造价控制提供反馈信息。方法在深入分析沉降发生发展规律的基础上，引入Verhulst模型，采用改进的曲线拟合的经验计算方法，挖掘施工期的实测数据所蕴含的信息。

The paper reviews the development in the analytical theory of mechanical behavior of composites, pointing out the problems existed, presenting creatively the concept of yarn state, solving the descriptive problem of perform structure of any woven composites and laying the foundation for predetermining the elastic behavior of 3-d woven composites with computer. On the basis of yarn state, the relative cross section deformation theory is introduced, the yarn cross section deformation is studied, and the experiential formula is described in the paper on the basis of experiment. The crimping state of yarn is studied, the classical "straight warp view"is modified, and the crimp height value of crimped yarn is studied. At the same time, with shrinkage rate sine method, the paper proposes the idea which imitate the shape of crimped yarn. With the third power template curve, the paper describes the microgeometry structure of fabric, finding a brief and precise approach for the calculation of mechanical behavior of composites.

本文回顾了复合材料力学性能分析理论的发展，指出了存在的问题，创造性地提出了纱态概念，解决了任意结构机织复合材料预制件结构表征问题，进而为用计算机预报三维机织复合材料的弹性性能打下了基础；基于纱态概念，提出了相对截面变形理论，研究了纱线截面变形情况，在实验的基础上给出了纱线截变经验公式；研究了纱线屈曲状态，修正了传统的&地经纱直线论&，提出了以纱线缩率研究屈曲峰谷值的思想，同时以三次样条曲线拟合了纱线的卷曲形状，较好地描述了织物的细观几何结构，为复合材料力学性能的计算找到了一条既比较简便又比较精确的途径。

The database of judging chip break is founded, which is based on the characteristic of chip breaking curve.

通过切削试验，获得了刀具主偏角、切削速度和工作材料牌号对切屑的极限进给量和极限背吃刀量的影响规律及其经验公式，并根据切屑折断曲线建立了判断切屑是否折断知识库和切屑折断预报系统。

Predicting the up-curl chip breaking of three-dimensional groove inserts;2. The database of judging chip break is founded, which is based on the characteristic of chip breaking curve.

通过切削试验，获得了刀具主偏角、切削速度和工作材料牌号对切屑的极限进给量和极限背吃刀量的影响规律及其经验公式，并根据切屑折断曲线建立了判断切屑是否折断知识库和切屑折断预报系统。

Then base on concept of energy dissipation, hysteretic behaviors of RC material, and experiential factors obtained from shaking table tests with repeated excitation, a deterioration rule for RC column after multiple earthquakes is established. According to the failure mode and damage condition in previous earthquake, the rule makes lateral force-deflection curve of RC column deteriorated by reducing stiffness and strength.

本文再根据能量消耗概念与RC材料之恢复力环特性，及由多次加载振动试验结果所得之经验参数，尝试建立RC柱构件之多次震害后折损规则，依构件破坏模式不同，对每次震后侧力-变形曲线加以刚度与强度逐次折减。

The method of slope deflection entails writing two equations for each member of a continuous frame, one at each end, expressing the end moment as the sum of four contributions:(1) the restraining moment associated with an assumed fixed-end condition for the loaded span,(2) the moment associated with rotation of the tangent to the elastic curves at the near end of the member,(3) the moment associated with rotation of the tangent at the far end of the member, and (4) the moment associated with translation of one end of the member with respect to the other.

登录后回答可以获得经验值奖励，并可以查看和管理所有的回答。登录|边坡变形的方法需要编写的每一个成员连续帧两个方程，一个在每个月底，表示为四个贡献的总和：最后的时刻（1）限制矩假设固定结束条件相关的加载跨度，（2）目前相关的切线与旋转的弹性曲线在接近年底的成员，（3）目前的切线与旋转有关在该成员的尽头，和（4）时刻与1月底的会员与翻译相关的其他方面。

Within certain flow rate range, by comparing with straight tube, equivalent friction factor versus Renolds number and geometry property are correlated.

本文对几种盘绕方式和曲率半径的弯曲盘管在一定流量范围的水阻力进行了实验研究，与同条件下的直管进行比较，得出弯管折合沿程阻力系数与雷诺数和管道几何条件之间的关系曲线和经验公式。

Based on the natural gamma log curve s of acid tuff and clay rocks of acid volcanic events,the author here queries the arguments that radioactive intensity of sedimentary strata will grow with the increasing argillaceous materials and that the natural gamma value and the empirical equation can be used to calculate contents of argillaceous materials.

根据酸性凝灰岩和酸性火山事件粘土岩的自然伽马测井曲线，对当前流传的&沉积岩层的放射性强度随泥质含量的增加而增高&的概念和用自然伽马值及经验公式求泥质含量提出质凝。

Based on this relationship, we can change the Tg of starch by changing its molecular weight to meet the pratical needs.The DSC technique is used to estimate the consistence character of starch with different additives. The glass transition behavious of starch blended with water and Xanthan gum are examined respectively. An expirical expression is obtained for the Tg of starch blendee with additives according to the blending model of polymers and verified with the experimental results. This expression can be used as a base to predict the Tg of starch blended with Xanthan gum.

采用DSC曲线分析法进行了各种填加剂与淀粉的相容性试验，考察了淀粉分别与水和黄原胶共混后体系的玻璃化转变行为，并根据高分子聚合物的共混模型对糯米淀粉与黄原胶共混物的玻璃化转变进行拟合，得到适用于此体系的经验关联式，并应用玉米等淀粉与黄原胶共混后的实验值进行验证，得到该关联式的有效性，为预测淀粉与黄原胶共混后的玻璃化温度值提供了理论依据。

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。