查询词典 variable compression ratio

In order to improve the high-performance concrete quality of longer brittleness, lower tensile strength, particularly the less descending branch in stress-strain curve compared with that of ordinary concrete. The breakthrough of this thesis lies in the mixture of short carbon fiber. Four factors such as water-binder ratio, volume ratio of short carbon fiber and blending value of high efficiency water-reducing admixture were selected as variable. Experiment was carried out by utilizing uniform design. Regression equation was established by regression analysis of the compression strength and the split tensile strength separately utilizing SPSS software. The process of optimization was obtained with the aid of MATLAB. Finally the optimized ratio was acquired.

为了改善高强混凝土由於水泥自缩、湿涨造成的脆性大、抗拉强度低，特别是应力－应变曲线的下降段不及普通混凝土的特点，本文以掺入短碳纤维为突破口，选取水胶比、砂率、短碳纤维的体积比、高效减水剂掺量四个因素作为变量，利用均匀设计安排试验，用SPSS软件对抗压强度和劈拉强度分别进行回归分析而得到回归方程，用MATLAB进行优化处理，进而求出最优配比。

Procedures for data compression can play a very good compression ratio, and a better quality of compression.

程序对数据压缩能起到很好压缩比，且有较好的压缩质量。

The main contributions include:(1) Energy conservation law of Haar wavelets transform is proved to compress data streams.(2) The relation between the coincidence measure and trend of streams is revealed as along with the invariability under parallel shift and the equivalence law over coincidence measure to approximately express data-streams by the wavelet coefficient of the characteristic stream and its energy.(3) Multi-Scales energy decomposition model is proposed to improve the compression precision.(4) The multi-scales compression algorithm and the energy conservation reconstruction algorithm are designed.(5) Extended experiments show that the compression ratio of the new methods is 2~4 times as the traditional method.

主要研究成果包括：(1)证明了Haar小波变换服从能量守恒规律，并用于压缩数据流；(2)揭示了数据流的偶合度与变化趋势的相关性、偶合度的平移不变性及等价规律，采用特征流序列的小波系数和流能量近似表示流的趋势，达到压缩的目的；(3)提出了多尺度能量分解模型，提高了表示精度；(4)设计了多尺度能量分解压缩算法以及多尺度重构算法；(5)在真实数据集上的实验表明，新方法的压缩比是传统小波方法的2～4倍。

Vector Quantization is an efficient lossy compression technique, whose prominent virtues are high compression ratio and simple decoding process, so it has become one of important compression techniques for image coding.

矢量量化是一种有效的有损压缩技术，其突出优点是压缩比大且解码算法简单，因此已成为图象压缩编码的重要技术之一。

To improve the transmission efficiency and reduce the storage requirement, efficient encoding algorithms should be used to remove the residual information in images, and fewer bits should be used to describe images on restrictions of given distortion. Vector quantization is an efficient lossy compression technique, whose prominent virtues are high compression ratio and simple decoding process, so it has become one of important compression techniques for image coding.

为了提高传输效率和减少存储空间，必须采取有效的压缩编码算法消除图像中所包含的各种冗余信息并在给定的失真条件下使用尽量少的比特数来描述图像。

Under the condition of axial compression, simple bending and compression-bending, the effects of parameters to CFTs mechanical performance are studied. The parameters taken in account are concrete compression strength, steel ratio, steel strength.

在轴压、纯弯和压弯情况下分析钢管混凝土柱力学性能受混凝土强度、含钢率和钢材屈服强度等参数的影响规律及其破坏机理。

Fourthly, it discusses the spectral image loss-less compression by applying thecorrelation and the entropy of the spectral image sequence. It gives and analyses three expressions of imaging spectrometer images, and tells the change in correlation coefficient and entropy for different expressions. At last, it puts forward D2PCM de-correlation method to reduce the spatial and spectral redundancy. This method improves the compression ratio and the compression efficiency, being easy and fast in operation.

根据成像光谱图像的空间、谱间相关性和信息熵的特征，提出成像光谱图像序列的三种表示方法，分析了不同表示方法的相关系数和图像信息熵的变化，并研究出了成像光谱图像的无损压缩方法，即利用D~2PCM方法对光谱图像序列进行去相关处理，同时降低图像的空间和谱间冗余，在提高了无损压缩的压缩比和压缩效率的同时，算法具有简单快速的优点。

Unique compression method, based on space vector compression method, compression ratio is not good, however.

详细说明：独特的压缩方法，基于空间向量的压缩方法，压缩比不大但是效果好。

First, we analyze the time complexity, space complexity and compression ratio of RFID data compression which uses traditional compression algorithm.

本文首先分析传统压缩算法在RFID数据上的应用，所需的时间复杂度，空间复杂度以及平均压缩效率；其次，分析改进型的压缩算法在RFID数据上的应用，所需的时间复杂度，空间复杂度以及平均压缩效率，通过对两种压缩算法的分析比较，体现改进压缩算法的有效性，并讨论小型企业和大型企业运用改进算法存储RFID数据的一些不同之处。

Rotary piston pump is a new structure of water pumps, running a very reasonable job, using the principle of variable volume compression job, a direct-driven rotary manner, as opposed to centrifugal pumps have a series of outstanding performance advantages, rotary piston pump with the complexity of the structure of the centrifugal pump, as with the shell and the rotor blades of the rotor and casing of the rotary continuous variable volume zone, the formation of continuous expansion and compression, pumping and pumping implementation functions.

旋转活塞水泵是一种新型结构的水泵，工作运行状态十分合理，采用变容积压缩原理工作，直接旋转方式驱动，相对于离心式水泵有一系列突出的性能优势，旋转活塞泵结构的复杂程度与离心泵一样，由外壳和带叶片的转子组成，转子与外壳形成连续的旋转变容积区，形成连续的扩张和压缩，实现抽水和扬水的功能。

Don not attempt to do something which you can not to do.

不要企图做那些办不到的事情。

The expression of CTGF and TNF-αweredetected by immunochemistry and the number of Clara Cells was calculated.

光镜下观察肺组织的病理变化，采用免疫组化染色观察肺组织中结缔组织生长因子和肿瘤坏死因子-α的表达和Clara细胞的数量。