面积法

According to the integrated fertility index of all the evaluate units, cultivated land in Mingguang was classified into five grades using the cumulative frequency curve method.

根据明光市评价单元的耕地地力综合指数，利用累积曲线法将耕地地力合理地划分为五个等级，并运用Mapgis6.7绘制耕地地力等级图及统计各等级耕地的面积。

Based on the information taken from the subcompartmental records a comparison between the actual and normal forests was made and a new point of view was proposed in the article: in the case of cultivating timber-forest which is different in cutover age, age class and growing speed within the range of the whole forest station, the forest age class distribution showing the opposite shape of "J" is of more benefit to keeping the relative stability of all the age class area than the age class distribution of th...

本文在统计森林资源小班档案卡片有关资料的基础上，把现实林分与法正林相比较，用法正林学说来指导全场森林的调查。并提出了一个新的观点：在整个经营单位内，培育不同生长速度，不同主伐年龄，龄级期不同的用材树种，森林的龄级结构呈反"J"形分布此法正分布更有利于维持各龄级面积的相对稳定，并且，年伐量的波动不大，有利于森林的永续利用。

In this paper,the in- fluence of the coupling aperture on the sound energy decay and coupling constant in the primary room is investigated by means of the finite-difference time-domain method,and the investigation is limited within the low-frequency range.

文中运用时域有限差分法，在低频范围内模拟了耦合窗面积的改变对主厅中不同位置的耦合常数和声能衰减的影响。

This article employs the method of element changing in definite integral to spread the dimension formula of plane figures .

利用定积分的换元法，推广了平面图形的面积公

The paper adopted the method of Braun-Blanquet school of vegetation ecology. Typical plots were chosen in order to investigate the vegetation type of the main parks in Kaifeng city. The analyses were based on defining the least area of communities with the usage of abundance dominancy and combining cover coefficient.

采用植被生态学中法瑞学派的研究方法，在确定群落最小面积的基础上，选取典型样地，运用多优度指数并结合盖度系数对开封市铁塔公园、禹王台公园、龙亭公园的植被类型、生境特点及各类型的群落生态学特征进行较为详细的研究。

A new method for calculation of earthwork quantity in hydraulic engineering was presented,based on analytical area measuring principle.

根据解析法量测面积原理，提出一种水利工程中土方量的快速计算法，该方法简便、易于掌握，计算精度有较大提

In this article the test and analysis with X-ray diffraction on the rf sputtering -formed granular films xFe-Al2O3 were made and the size and the chemical element area ratio of particle Fe were calculated.

对rf 溅射法制备的xFe-Al2O3颗粒薄膜，应用X射线衍射仪进行了测试和分析，推算了不同样品中Fe粒子的大小和元素面积比。

The vapour and plasma ignition times of the target are got based on the equation of heat conduction and cascade model. We suppose that the plasma is ignited when 210 generations of new electrons are born in vapour generation time. The influence of temperature on the thermodynamics and optics parameters of material also have been considered in the model. The resulting theory has good agreement with the experiment and overseas report. A blade method to measure the laser spot is given in this paper with validation and error analysis. The plasma threshold of metals in atmosphere and water ambients both are diagnosed with the light deflection and piezoelectric transducer. A Q-switched pulsed Nd:YAG laser operating at infrared (1064nm), visible(532nm) and ultraviolet (355nm) wavelengths has been used. Al、Fe、Cu are used as targets and get a similar results with both method. Theoretical and experimental analyses are applied on the influence of wavelength on the threshold have been done, both of which have shown that the plasma threshold of metals decrease as the laser wavelength increases; The plasma threshold of metals are higher in water than in air and the pressure of the shock wave in water is five times higher than in air.

从热传导方程和雪崩电离机制出发，假设当电子增值2~(10)倍时，考虑了温度对材料热力学和光学参数的影响时，得到了气化和等离子体点燃的时间，利用该模型进行计算得到的结果与国内外报道及自行通过实验测得的阈值基本一致；提出了利用刀刃法测量激光光斑面积的方法，并通过实验进行了验证和误差分析；利用光偏转装置和压电换能器分别对空气和水中金属等离子体点燃阈值进行了实验诊断，激光器均为调Q—YAG激光器(波长1064nm，532nm，355nm，脉宽10ns)，靶材分别为Al、Fe和Cu，两种测试方法得到的等离子体点燃阈值基本一致；本文从实验和理论计算两个方面讨论了波长对等离子体点燃阈值的影响，均得到了等离子体点燃阈值随着波长的增加而减小的结论；对空气中和水中不同环境下金属等离子体的点燃阈值进行了比较研究，得到了金属在水中的等离子体点燃阈值比空气中的大，且水中产生的冲击波的压强是空气中的5倍左右的结论。

Gunpowder calcning technology Shengzhou also made a successful reform for reform bake two young Rolling Green 2, played a good role to improve the quality of some of the high mountain tea fire district has created Gunpowder tea absorption method.

嵊州市还对珠茶炒制工艺作了成功的改革，改烘二青为滚二青，对提高品质起到了良好的作用，部分高山茶区还创立珠茶匀火制茶法。1971年和1980年，嵊州市茶叶产量接连跨上2500吨和5000吨两个台阶。1981年，天坛牌特级珠茶获国家银质奖，1984年，又获国际金奖，之后嵊州市被确定为全国珠茶出口三个基地县之一，1989年茶园面积达15.6万亩，产量近万吨。

Clearly Computers serves the Halifax/Dartmouth area and has recently expanded it's services nationally and internationally.

显然计算机服务哈利法克斯/达特茅斯面积扩大它最近的国内和国际服务。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。