REPLACE mode deletes all existing data from the table ( by truncating the data object) and then inserts the input data. REPLACE模式(通过删除数据对象)删除表中的所有现有数据,然后再插入输入数据。
This also means commit or rollback will result in truncating the table. 这还意味着提交或回滚会造成表被截短。
'w'indicates that you want to write data to the file, truncating the previous contents. 'w'表示要向文件写入数据,并截断以前的内容。
If this option is used, truncating can still occur if a greater-than symbol and a pipe (>|) are used, instead. 然而,启用此选项后,如果使用大于号加管道符号(>),则仍然会发生截断。
This means you can perform all operations ( such as compressing data, moving rows to the front of the partition, and truncating free space from the end of the partition) with a single SQL statement or with multiple separate statements. 这意味着可以用一个SQL语句或多个单独的语句执行所有操作(比如压缩数据、将行转移到分区的前部,并释放分区末尾的空闲空间)。
The recovery data are composed of average intensity obtained by truncating the two least significant bits ( LSBs) of each pixel within each block. 然后,将图像块中像素最低有效位和次最低有效位分别置零,以置零后的像素平均亮度值作为恢复数据。
The predictive model is acquired by truncating appropriately the Taylor series expansion for system state. 其预测模型通过对系统状态泰勒级数展开并做适当的截尾处理获得。
The equivalence of maximal self-orthogonal codes obtained from binary self-dual codes by truncating are discussed. 研究了自对偶码与其删截得到的极大自正交码的等价性问题。
Low-temperature Globe Valve is mainly used for truncating or connecting the liquid oxygen, nitrogen and other media at low temperature. 低温焊接截止阀主要用于管道系统在低温状态下对液氧、液氮等介质的截断或接通。
If the developing world is backed into a corner, the big players will say no [ to a deal] on the grounds it is truncating growth and that the risk is too great. 如果发展中世界被逼到角落,那么那些大国就将拒绝接受[协议],理由是这将损害经济增长,风险过大。
The causal and realizable FIR reconstruction filter banks are designed by delaying, truncating and windowing of ideal impulse responses, and the high-speed multichannel derivative sampling ADC system is achieved. 对理想滤波器的冲激响应进行了延迟、截断和加窗来得到可实现的有限冲激(FIR)重构滤波器组,从而实现了高速的多阶微分采样型ADC系统。
The calculations are based on the transfer matrix method and a truncating approximation. 采用了转移矩阵方法和截断近似技术。
A time continuous nonlinear model predictive control scheme for robot manipulator is studied with a predictive model acquired by truncating appropriately Taylor series expansion for system states, and control law identified by optimizing the cost function. 研究了一种机器人非线性连续预测控制方案,其预测模型通过对系统状态进行泰勒级数展开并作适当的截尾处理来获得,并通过优化性能指标求得控制律。
By means of truncating the infinite series and applying the collocation method to solve the set of the linear algebraic equations the approximate solution of the Oseen flow of finite clusters of spheres and the drag factor for each sphere are presented. 截断无穷级数并采用配置法解线性代数方程组求出了球栅Oseen流动的近似解及每个球所遭受的阻力。
Truncating the infinite series, the corresponding coefficients in the series are determined by a collocation technique. 采用配置法将无穷级数截断并确定出级数中各项系数。
And implemented the accurate on-chip bit-rate control by truncating bit-stream in parallel according to the prediction of the rate-distortion threshold. 通过率失真门限预测并行截断码流,在片内实现了对码率的精确控制。
Based on the method of generating the balance Gold code, the method of truncating balance Gold code is put forward. 在给出搜索和产生平衡Gold码方法的基础上,给出了截短平衡Gold码的概念,提出了一种对平衡Gold码进行截短的方案。
In the end, a large amount of simulation results testify the validity of truncating current limiting compensating and proportion compensation capacities of APFs and the feasibility of coordination control strategy for combined running of APFs. 最后,通过大量的仿真验证了截断限流补偿和补偿容量按比例分配的有效性,以及协调控制策略在多台APF联合运行中的可行性。
The improved algorithms can reduce significantly the truncated error of the truncating unit pulse ( or step) response time-sequence of the controlled process as the internal model. 改进算法可有效减小截取被控对象时间响应(单位方波或单位阶跃响应)有限序列为内模的截断误差。
In this paper, we discuss the effect of truncating the maximum phonon vector on collision rate, and find the relation between scattering rate and electron kinetic energy. The conclusion is consistent with that obtained from other theories and experiments. 本文分析了截断散射声子波矢对散射速率的影响,得到散射速率与电子能量的依赖关系,与其他理论及实验结果一致。
In this paper, the Perfectly Matched Layer ( PML) is adopted as the truncating boundary for the analysis of conductor electromagnetic scattering problems. 本文用完全匹配层作为开域边界条件,对导体目标的散射问题进行了研究。
Systemic output contains truncating noise after 16-point FFT because of finite word-length approximation to figure. 由于有限字长的限制,使得工程应用中16点快速傅里叶变换(FFT)的结果中含有截尾噪声。
Optimal Design of Truncating Point in Truncated Sequential Posterior Odd Test 截尾序贯验后加权检验截尾点的优化设计
This paper brings forward an adaptive method& AMBTC ( Adaptive Module Block Truncating Coding). 提出了一种自适应块规模的块截短编码方案;
Because the errors caused by truncating the high modals are avoided, the perturbation solutions of eigenvalues and eigenvectors are high accurate perturbation solutions; 由于避免了在求解特征向量的摄动时的模态截断误差问题,用该方法得到的特征值和特征向量的摄动解是高精度的摄动解;
Nonlinear dynamic system in two dimensions is expressed by a group of equations by approximately Truncating nonlinear dynamic system in two dimensions. 通过对二维非线性动力系统的截断近似,使得二维非线性动力系统由一组方程来表达。
It is one of simple, effective ecological techniques that truncating and disposing Non-point source urban pollutions by making use of percolation function of soil. 利用土壤的渗滤功能对城市非点源进行截纳和就地处理是非点源治理中一种简单有效的生态治理技术。
And effects on improving original inversion image are clear by associated use of post treatments, variance truncating, median filtering and classification analysis. 依据模型参数方差向量,本文提出了方差截断后处理方法,并结合中值滤波和聚类分析,对原始反演图像进行去噪后处理,成效明显。
An approximate solution is obtained by truncating the sequence to a finite iteration, and then an approximate optimal control law with purely close-loop linear state feedback form is designed. 通过截取有限的迭代结果,得到原非线性系统最优控制问题的一种近似解,并得到具有完全闭环线性反馈形式的近似最优控制律。
The exact solution is given in the form of series and an approximate solution is obtained by truncating the series. The error of the exact solution and an approximation is monotonically decreasing and tends to zero. 获得了级数形式的精确解表达式,并通过对级数的截断得到了近似解,证明了近似解与精确解之间的误差是单调递减的,并且趋于零。