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With reference to the international universal System of National Account, to calculate the highway freight final production in terms of added value, this paper presents an accounting approach of highway freight added value, based on the added value coefficient according to tonnage.

本文借鉴国际通用的国民帐户体系，采用公路货物运输增加值对公路货物运输最终成果进行计量。研究公路货物运输业增加值的核算方法，计算出按照吨位的增加值系数，然后根据增加值系数计算出公路货物运输增加值。

Soil organic matter was high in Baoshan tobacco-growing areas and ranged from 1.50 g/kg to 148.10 g/kg with a mean of (32.43±12.38) g/kg and variation coefficient of 33.34%.

保山烟区土壤有机质含量较丰富，平均为(32.43±12.38)g/kg，变幅为1.50~148.10 g/kg，存在广泛的变异，其变异系数达33.34%。

Through this method,the integral gain varies with the average phase shift between tip speed ratio and power coefficient.

针对传统最大功率点追踪极值搜索法固定积分增益存在的不足，依据不同积分系数对系统的影响，提出了一种MPPT变增益极值搜索法，使积分增益随叶尖速比和功率系数之间平均相位移的变化而变化。

An expression of combined heat transfer coefficient was obtained based on the heat transfer analysis of a blast furnace copper stave, and the combined heat transfer coefficients at different gas temperatures were obtained through the thermal test in an experimental furnace.

根据铜冷却壁传热过程分析，得到铜冷却壁热面复合传热系数的计算公式，并在1：1的热态实验炉上进行了热态实验，得到不同炉气温度下相应的热面复合传热系数值。

It has the advantages of simple structure, easy fabrication, high recovery coefficient, short response time and spot temperature measurement etc.

总温热电偶具有结构简单、制作简便、温度恢复系数高、响应时间短、能测量点温度等特点，更适用于测量高焓高速气流总温。

By the way,it may realize the change curve of negative temperature coefficient for the thermal resistor.

电压信号利用声卡采集到计算机中，由LabVIEW软件编写的虚拟锁相放大器测量，实现了测量负温度系数的热敏电阻阻值随温度的变化曲线。

In order to solve this problem, the effects of airflow velocity and airflow direction on heat transfer coefficient of wall surface are studied in this paper.

为了解决这个难题，本文通过实验测试和系统辩识的方法研究了风速风向对墙体表面换热系数的影响。

Equivalent stretch elastic modulus E,sound reflection R and transmission coefficient T are calculated by the method of equivalent stiffness and transfer matrix separately.

通过试验获取了碳纤维、凯夫拉纤维、玻璃纤维、超高分子量聚乙烯纤维复合材料的力学性能和声学性能参数，在此基础上分别利用等效刚度法和传递矩阵法，对CF/UHMPEF、CF/KF、CF/GF混杂纤维复合材料的拉伸刚度、声反射系数和声透射系数进行计算。

Flow-field simulation shows that radial pressure gradient goes down fast and air flowrate is nearly directly proportional to the well vacuum and the soil permeability coefficient. It also indicates that stop-off coating will play an important role in SVE.

采用Galerkin三角形有限单元法对复合地表边界的竖井土壤气相抽提稳态流动问题进行了数值模拟分析，模拟结果显示：气相压力沿径向梯度迅速下降，抽提流量与土壤通透系数及真空度呈现高度相关的正比例关系，且地表隔绝覆盖层对流场影响很大。

Manufactured-sand concrete ; stone-dust ; resistance to freezing ; chlorine ion permeability coefficient

机制砂；石粉；抗冻性；氯离子渗透系数

More direct, directer ; most direct, directest

径直的，笔直的

Do you know how to use a chain saw?

你知道如何使用链锯吗？