This is beneficial when the dataset is large and the frequency of queries that request the area of a circle is high.
如果数据集较大，或者经常发出请求圆面积的查询，那么创建函数索引将有助于提高性能。
Faddy short messages refer to those short literal messages which have a high frequency of copy, a fast speed of popularity, a vast area of spreading and a great power of influence.
时尚短信是指复制频率高，流行速度快，传播面积广，影响力度大的文字短信，它已成为现代人最为重要和流行的一种交际时尚。
Performing high frequency eddy current inspection of area around skin cutout and make sure that no crack existing.
对蒙皮切口周边区域做高频涡流探伤检查并确定无裂纹存在。
Signal is in low frequency, while noise in high frequency and minutia in image is also in this area.
信号主要分布在低频区域，而噪声主要分布在高频区域，同时图像的细节也分布在高频区域。
The drought often results in disaster that brings a great loss to the life and produce of people, because of its high frequency, large area and long time.
由于它具有发生频率高，影响范围广，持续时间长等特点，因此往往会形成旱灾，给人们的生产生活带来巨大损失。
The degradation of methyl orange was high, which was related with the peak value, pulse frequency and duty circle of positive pulse and anode area.
甲基橙的脱色程度与峰值电压、脉冲频率、占空比、阳极电极面积等有关。
High power GTO inverter is used for railway electric traction. Its PWM control is significantly different from variable frequency drive system in conventional industrial area.
大功率GTO逆变器用于铁路电力牵引，其PW M控制与一般工业领域中的变频调速系统的PWM控制有很大不同。
A modified direct digital frequency synthesis (DDS), pipelined structure, and time-sharing ROM are adopted in the chip, for saving chip area and ensuring high performance and speed.
该芯片采用了改进的直接数字频率合成算法、流水线结构与ROM分时复用技术，保证了芯片的高性能和速度，节省了芯片面积。
The backwashof low frequency, high compressive strength, no powder, no hardening, high activity and large specific surface area, good regeneration effect.
反洗频率低，抗压强度高，不粉化、不板结，比表面积大，活性高，再生效果好。
The high turn-on frequency permission selects the small superficial ceramics electric capacity, may save the board level area, reduce the cost and to reduce the output voltage ripple.
高的开关频率允许选用小的表面瓷陶电容，可节省板级面积、降低成本和减小输出电压纹波。
The simulation results were: (1) under simulation scenario without harvest, the fire regime was characterized by low frequency, high fire severity and large fire damaged area;
研究结果如下：（1）在无采伐预案下，火干扰模式为低频率大面积高强度火烧；
The investigation use sample interview, behavior observation and Questionnaire, find out the behavior situation of the users with high frequency in green area.
在实际调查采访中采用抽样采访法、行为观察法、问卷调查法三种方法结合使用，了解高频率使用人群在场地中的活动情况。
In the area where call frequency is high, we will add more channels to provide adequacy system service source to reduce average load.
对高话务量区域提出增补信道的建议，增加系统资源，降低资源平均负荷；
Geometrical optics approach can only calculate the high frequency approach solution of drilling bit vibration source wave equation in non caustic area but it become invalid in caustic area.
由于几何光学法求解钻头震源波动方程的高频近似解有局限性，即在焦散区失效，故只能计算非焦散区的高频近似解。
By extracting the multipulse excitations during voiced speech, and adding the excitations into the process equation the harmonic of high-frequency area can be reconstructed.
通过在浊音段提取多脉冲激励信号加入语音的状态方程，有效地重建语音的高频谐波。
To contrast with the application of the other periphery ASIC, the design of Godson2F based board has the characteristic of high frequency, high degree of difficulty and extensive application area.
与外围专用器件的应用相比，龙芯2f有接口频率高、板级设计难度大、应用领域广的一系列特点。
Restricted water area is an area full of encountered ships and also a high frequency accident area.
限制水域是船舶会遇率较高的水域，也是事故多发水域。
Using infrared system the apparatus of non-touching at limited-area to monitor the hardening temperature at site is produced for high-frequency induction heat treatment.
利用红外测温原理，研制出高频热处理时的小目标非接触式在线动态监控淬火件温度的装置。
Small rainfall events mainly benefited herb species, and the high frequency but low amount of rainfall partially explained the relatively high vegetation cover in this area.
综合考虑降水模式与不同生活型植物对小雨量降水的响应特点，高频率的小雨量降水，可能是维持本区较高植被覆盖度的重要原因。
And introduce a key design of high precision and width frequency area of phase meter.
并介绍一种高精度、宽频率范围的相位表的关键设计。
In conclusion, there were some differences in the results of soil surface evaporation, when the leaf area index was large. A further study was needed under high-frequency irrigation.
分析认为，当叶面积指数较大时，棵间蒸发的现有研究结果尚存在较大的差别，而且高频灌溉条件下的土面蒸发有待于进一步研究。
The IPG is then programmed to deliver a high-frequency electrical stimulation to the targeted area of the brain.
脉冲发生器按程序传递高频率电刺激到脑部靶区。
Due to the varied topography and large icing area in China, the flashover accidents of ice-covered insulators happen with high frequency.
我国地形地貌复杂，覆冰面广，输电线路绝缘子冰闪事故时有发生。
These threedimensional geometry can be conveniently fabricated, and it has higher sensitivity on the high frequency response, that has smaller area of the junction.
这种三维结构隧道结和桥型结制作方便。其中，小面积隧道型和桥型三维点接触具有较好的高频性能。
SMC can reduce more loss in the High-frequency area but it cannot make up the disadvantage of bad permeability.
而且在中高频应用领域只是能够降低更多的损耗，但其导磁性能差的缺点还是没能弥补；
When the dielectric constant of the internal structure is increased, there are many wider band gaps in the high-frequency area.
当内部结构的介电常数增大时，在旋转操作下高频区产生了一系列较宽带隙。
When the dielectric constant of the internal structure is increased, there are many wider band gaps in the high-frequency area.
当内部结构的介电常数增大时，在旋转操作下高频区产生了一系列较宽带隙。
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