采样

Juvenile milkfish were sampled from ponds at Cigu, Mituo and Linbian and transported to laboratory in ice or liquid nitrogen. After thawing and removing scale, head and viscera, samples were stored at 4 or -20°C, respectively, and the changes in quality of flesh were investigated at certain time interval during storage.

原料鱼采样自七股、弥陀及林边等三处之鱼池，以碎冰或液态氮冻结方式运送至实验室，经解冻、去鳞、头及内脏处理后，分别贮藏於4℃或－20℃，定期采样以了解鱼肉品质的变化。

Sampling frequency is also deduced oncondition that algorithm error has little effect on the dielectric loss angle measurement.

推导了在基于DFT的自适应整周期采样算法误差对介质损耗角测量影响不大条件下的采样频率，并进行了数值仿真。

In order to do well the statistic work for the samples in zones of different kinds and grades of ores, the interval grade statistic list and statistic histogram were automatically generated by computer for data processing system of sampling design.

为在采样设计时，做好矿石不同类型、同品位区间样品的统计工作，笔者用采样设计数据处理系统实现了若干区间品位统计表、计直方图的自动生成。

This paper analysized the relationship between sampling frequency fs and the taps N of low pass filter in A/D transform and got a formula expression, which can give reference to the parameter design of quadrature sampling.; aiming at the wave distortion in traditional arithmetic of quadrature sampling with pulse compression, an improved algorithm has been studied and validated in Matlab and get perfecter result. In order to enlarge the detect distance of Radar, a method of part pulse compression is put forward, the realistic sense and the implement scheme is analysized.

本文分析了在正交插值前端A/D变换中采样率的选择与正交插值低通滤波器的阶数的关系，得到公式化的表达式，可为正交采样参数设计提供参考；针对传统的正交插值及脉冲压缩算法中的波形畸变提出了改进方案，并通过仿真实验得到较好的效果；为扩大雷达的探测距离，提出部分脉压的方案，详细分析了其理论意义及实现方法。

Based on the characteristics of the parallel sampling monitor combined with SYC-- III peto tube, a calculating program for parallel sampling of stack dusts has been compiled, which is to some extent versatile .

结合SYC--Ⅲ型皮托管平行采样测试仪的特点，编制了具有一定通用性的烟尘平行采样计算程序。

Then the zero-crossing detection method and the DFT algorithm adopted in the phasor measurement are discussed in detail.

接着，介绍了同步相量测量的信号过零检测法、定频采样和变频采样的离散傅立叶法。

The instrument simultaneously sample for three phase voltage and current. Rotary photoelectric coding switch and LCD are used for human-computer interaction. it makes the interface compact and efficient. Utilizing the function of positive and negative edge trigger of the programmable counter array unit in MPU, signal zero-cross is captured for the phase detected based on double way. The software synchronism sampling method based on real-time parameter self-optimizing minishes period truncation error, and the measurement accuracy is improved. The digitization power measure imports traditional two-unit and three-unit methods and expands application range of the instrument. The capacity is discriminated by soft ware table-look-up on the load loss. The value of a quantity is converted to the value when reference temperature (75 ℃) from test temperature.

该仪器具有以下特点：仪器对三相电压电流同时采样；基于旋转式光电编码器和液晶显示屏的人机交互界面简洁而高效；可编程计数器阵列PCA"捕获"信号的过零点用于双向过零平均鉴相，得到准确的相位差和周期；基于实时参数自寻优的软件同步采样，有效地减小了周期截断误差，提高了测量准确度；数字化功率测量引入了传统的二表法和三表法，扩展了仪器的使用范围；实际容量根据负载损耗用软件查表的方法来判别；测量值已从试验温度折算到了参考温度(75℃)时的值。

Secondly, based on the piecewise continuous Lyapunov function andconstant Lyapunov function, the problems of robust guaranteed cost control forparametric uncertain sampled-data control systems are investigated by using the jumpsystem model and linear matrix inequality technique.

然后，针对参数不确定采样系统的鲁棒保性能控制问题，利用跳变模型和线性矩阵不等式技术，分别基于分段连续Lyapunov函数方法和定常Lyapunov函数方法研究了采样系统的鲁棒保性能控制器综合问题。

Plane tree and glossy priver were chosen to monitor SO2 pollution in 29 sites selected from 14 locations in general air polluted areas and 15 locations in heavy industrial polluted areas in Nanjing city.

本文通过对南京市区29个采样点的采样和分析(市区14个点代表一般城市的环境状况、大厂区15个点代表重污染区的环境状况)，确认法桐和女贞两种树木叶片含S量与大气中SO_2浓度密切相关。

By testing, image lattice point is confirmed as 288×312. The circuit of high sa mpling and buffer storage is used to carry out sampling of 5 M/s.

经试验，确定所采集的图像点阵为288×312点，并采用高速采样缓冲存储电路，由硬件实现5 M/s的高速采样。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。