查询词典 sampling method

The performance of the digital system is dependent on the sampling period T.Larger sampling periods usually give rise to higher overshoots in the step response, and eventually may cause instability if the sampling period is too large.

的业绩数字系统是依赖于采样周期吨放大采样期间通常会导致更高的overshoots的阶跃响应，并最终可能会导致不稳定，如果采样周期太大。

The phosphorus forms and BAP vary with horizontal and vertical positions. The total phosphorus, inorganic phosphorus, BAY, and iron-phosphorus contents were high at a depth of 0~20 cm at the first sampling point, and then decreased at 20-40 cm of depth. This shows that the potential release capacity of P at 0-20 cm of depth is higher. The concentrations of total phosphorus and inorganic phosphorus decreased at 0~20 cm of depth and increased at 20~40 cm of depth at the second sampling point, but BAY and Fe-P increased along with the depth consistently. This shows that the deeper layer at the second sampling point had a higher potential release capacity of phosphorus.

不同地点沉积物各磷形态和BAP的垂向变化有较大的差异。1号采样点的总磷、无机磷、铁磷和BAP质量比在沉积0~20 cm处较高，20~40 cm逐渐减小，说明0~20 cm内释磷潜力较大；2号采样点的总磷和无机磷质量比先减小，20~40 cm逐渐增加，而BAP和铁磷质量比随深度增加呈上升趋势，说明2点深层具有较大的释磷潜力。

Factors influencing the tensile strength of polymerizer head sample were introduced,which included the sampling position,sampling direction,sampling quantity and the cross section shape of sample.

介绍了影响聚合釜封头试样拉伸性能的因素：取样部位、取样方向和取样数量及试样的横截面形状。

This sampler is mounted along the pipeline, and there is no need for elevation difference, thus no pressure head lose is caused. Because of the special structure of the sample spoon and perpendicular sampling to the slurry flow, the sampling is kept accurate and respresentative. Sampling time is adjustable between 5 minuets to 50 minuets. Photoelectric technology is applied to the electrical part, and complete safety protection circuit is prepared. Its control is rather simple, action sensible and safety reliable.

该取样机顺管道安装、不需要任何高差，对矿浆无落差损失，取样勺结构独特，垂直矿浆流向取样，取样准确、代表性强；取样时间在5～50分钟区间内可随时任意设定和改变，电器部分采用了光电新技术，设有完善的保护电路，控制简单，动作灵敏，安全可靠。

The quantizing error, linear error and differential linear error of an A/D converter were deduced, after that the error model of synchronous sampling, asynchronous sampling and quasi-synchronous sampling algorithms used in power measurement wens build in condition that A/D was not perfect.

建立了该两种乘法器的物理模型，数学模型和误差仿真模型，全面地分析了各种参量对其交流功率测量的原理误差和仪器误差的影响，并给出了定量的结果。

The main sampling methods include contiguous grid quadrats sampling and random communities sampling.

常用的取样方法有梯度格局法和典型群落随机取样法，其中最小取样面积的确定尤为关键。

At first the current sampling values pass through virtual digital CVTs. And then the voltage and current sampling values are processed by a low pass filter. According to the instantaneous value of transmission line voltage, the current instantaneous values of shunt reactors and P equivalent circuit capacitance can be calculated. After removing these two kinds of current, sampling value differential protection based on all components and fault component can be applied.

由线路电压瞬时值分别实时计算出流入并联电抗器和流入线路Π型等值电路两侧电容的电流瞬时值，再从线路每侧电流除去这两部分电流，用得到的新电流瞬时值作常规采样值差动和故障分量采样值差动保护计算。

A mathematic model based on APQ was develop ed with a sampling rate and maximum false alarm rate as inputs to determine the optimum sampling size, sampling freq...

该方法包含了涉及控制图设计的所有关键元素，但是它比控制图的经济和半经济设计模型简单易用。

The questionnaire method and the interview menthod were used to gain the tourist data, the quota sampling method was used in sampling survey, the principal component analysis method was used to measure the various variables, the statistical methods such as linear regression analysis, multivariate linear regression analysis, single factor variance analysis and logistic regression analysis were used to analyzes the relationship between various variables.

具体来说，在获取游客数据时采用了问卷调查法和访谈法，在抽样调查时采用了配额抽样方法；对各变量进行测度时使用了主成分分析法；在分析各变量之间相互关系时采用一元线性回归分析、多元线性回归分析、单因素方差分析及Logistic回归分析等统计方法。

Firstly, this paper investigated roundly the basic theory of the ambient vibration method, analyzed systematically the main methods of ambient vibration identification, and discussed their advantages and disadvantages. Then we established the finite element model of structural dynamics and test model and analyzed their mutual relation, improved MUSIC method and correlation function method in the harmonic identification, and gave the subspace method and correlation function method based on continuous model, which is multi-harmonic retrieve technique. And then, this paper also puts forward least-squares method to estimate directly structural physical and modal parameters; this approach replaced the derivative operator in the continuous time model with an equivalent approximation, and estimated the physical parameters of structures by the least-squares method. And then, we discussed the approximation methods of derivative and their convergence. Finally, this paper researched the modal parameters of a frame structure by the simulation and test. The results demonstrated that subspace method, correlation function method and the least-squares method are effective and stable respectively.

全面地研究环境振动识别方法的基本理论，系统地分析环境振动识别方法的主要方法，讨论它们的优点和不足；建立结(来源：6666AB44C论文网www.abclunwen.com)构动力学的有限元模型和试验模型，分析有限元模型与试验模型之间的相互关系；改进谐波识别中的MUSIC识别方法和相关函数识别方法，给出大型结构模态识别的连续型的子空间分解识别方法和相关函数识别方法，这个方法是多元谐波识别方法；提出直接识别结构的物理参数和模态参数的最小二乘方法，这个方法利用导数的近似值代替导数值，并运用最小二乘方法识别结构的物理参数，讨论导数近似值的选择方法，分析算法的收敛性；通过仿真计算和模型实验，研究高层框架结构的模态参数识别，验证子空间分解识别方法、相关函数识别方法和最小二乘识别方法的有效性，算法的稳定性；从理论和试验两个方面分析和研究噪声对识别精度的影响，影响识别精度的因素，以及部分模态成分的模态参数不能够被识别的原因。

A backer of an Afghan law that critics say legalizes marital rape has rejected the international outcry as foreign meddling.

饱受批评的一项法律的拥护者说合法化的婚内暴力不会受国际舆论的干涉。

Years ago, a ancient Egyptian fleet went to the Land of punt for seeking a kind of flavor named "myrrh", and aromatic plants which has dense exotic style for the queen Hatshepsut.

3500年前的一个古埃及的舰队到&彭特之地&寻找一种叫没药的香料。