采样

To increase the security of the watermark, a new binary image encryption algorithm based on TD-ERCS map is presented. The watermark is encrypted by a chaos sequence generated by TD-ERCS map; A novel color image watermarking algorithm is proposed based on discrete chaotic map and 2-dimensions discrete wavelet transform. The watermark is encrypted by the new binary image encryption algorithm, and the encrypted watermark is embed into four sub-bands of the most deep level of blue branch of host image by three-level wavelet transform, and the embedded positions are determined by general cat cha otic map; A novel color-image blind detection watermarking algorithm is proposed based on integer wavelet transform and subsampling. The scrambled watermark is encrypted and embed into the low sub-bands after four sub-images of the Y branch of host image is transformed by two-level wavelet transform, and the embedded positions are determined by Logistic chaotic map, this watermarking scheme can realize blind extraction.

为了提高水印图像的安全性，提出了一种基于TD-ERCS混沌映射的二值水印图像的加密算法，该算法利用TD-ERCS映射产生的混沌序列加密水印图像；将离散混沌映射和二维离散小波变换相结合，研究了彩色图像水印新算法，该算法先对混沌序列加密后的水印图像进行小波变换，再嵌入到宿主图像的蓝色分量的最深层的四个子带中，嵌入位置则由广义猫映射确定；将整数小波变换和图像子采样技术应用于数字水印，提出了一种彩色图像盲提取水印算法，水印嵌入时，先对宿主图像在YIQ色彩空间中的Y分量进行子采样，并对得到的四个子图像分别进行二级离散小波变换，然后将置乱并加密后的水印图像嵌入到小波变换后的低频子带中，其嵌入位置由Logistic混沌映射产生的混沌序列确定，实现了水印的盲提取。

The crosstalk reducing unit (14) has a sample rate converter (19) coupled to a synchronous clock for converting the output of the subtractor to the data signal (8) at a synchronous sample rate.

所述串扰降低单元(14)具有与同步时钟耦合的采样率转换器(19)，用于以同步采样率把所述减法器的输出转换为数据信号(8)。

Inertial impactor is one of the most important particulate samplers,which is widely used for the atmospheric particulate classification.

惯性冲击器是最重要的颗粒物采样器之一，被广泛用于大气颗粒物的分级采样。

Sampler as an individual design or collect all the samplers for a larger project.

采样器作为一个单独的设计或收集所有采样器为一大型项目。

The simulation of the bandgap reference using ideal resistents shows that It's precision is 16.6 ppm.The dynamic range of the sensor is increased by 2~N using multi-sample. The FPN is cancelled using CDS. The pipeline ADC has the good tradeoffs of resolution, sample rate and area.

像素阵列的扫描方式使用多采样技术可以提高传感器动态范围2~N倍，相关二次采样技术消除了像素单元之间的固定模式噪声，使用流水线式的模数转换器可以实现好的分辨率、速度和面积等的折衷。

This board uses two chips, six channels A/D converter and phase locking synchronous technology for collecting three-phase voltage and current signals in timing and equal-time cycle sampling ways, and the gained data make more reasonable for power quality norm analysis.

并采用了两片六通道高速A/D转换器和运用了锁相同步技术，对三相电压和电流信号能进行定时采样和等间隔采样，这样得到的数据对于下一步电能质量指标进行分析更为合理。

This board has proper strategy to get the data for power quality analysis, because it uses two chip, six channel analog-to-digital converter and phase locking synchronous technology, which make it able to collect three phase electric voltage and electric current signals in timing sampling and equal-time cycle sampling ways.

并采用了两片六通道高速A/D转换器和运用了锁相同步技术，对三相电压和电流信号能进行定时采样和等间隔采样，这样得到的数据对于下一步电能质量指标进行分析更为合理。

The hardware includes four parts: preposed circuit, sampling circuit, DSP circuit and display circuit. The software includes four parts: main program, FFT program, power algorithm program.

硬件分为四个部分，前置电路、采样电路、DSP电路和显示电路；软件也分四部分，分为主程序、采样子程序、FFT子程序和功率电能计算子程序。

In this paper,a mathematical model of sampling process is presented,based on stochastic processes theorem,then using this model,we establish a fire\|new equivalent sam pling theory.

在随机过程理论基础上建立了采样过程的数学模型，并利用该模型建立了一种全新的等效采样理论。

In order to know the difference of 3 air bacteria sampling methods, synchronous sam- pling by 3 methods was carried out in a same room of a hospital.

为了解3种空气细菌采样方法的差别，在医院同一室内，同步进行3种方法采样。

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。