查询词典 range estimation

In order to overcome the limitations of kernel estimation and shortcomings of the method for determining inliers/outliers threshold in ErrorInVariables model, the projection based Mestimators was improved. First, a new mode search method named adaptive kernel density estimation was proposed. Then, a different strategy was given to determine the inliers.

针对EIV模型中基于投影的M估计方法存在的核密度估计和正常点与异常点阈值确定的局限性，提出一种改进的投影M估计算法：首先给出新的用于搜索极值点的自适应核密度估计函数，然后改进了正常点的确定方法。

In this paper, the M-estimation method is used to obtain robust parameter estimation of DE-model in long-tailed clutter.

针对这种情况，该文利用M估计方法来实现对长拖尾杂波下DE模型参数的稳健估计。

The result showed that the maximum chlorophyll index was more suitable for the estimation of chlorophylla concentration in the water body of Taihu Lake than the fluorescence line height in the inversion analysis for the estimation of chlorophylla concentration using MERIS fluorescence parameters, and the normalized fluorescence height (NLHR681/R665) had the best fit with the measured chlorophylla concentration.

结果表明：MERIS荧光参数中最大叶绿素指数较基线荧光高度更适合太湖水体叶绿素a浓度的反演；归一化荧光高度与实测叶绿素a浓度间的拟合效果最好。

The fast motion estimation algorithms are classified by the approaches of how to accelerate the search process, and the in-depth study of the fast block matching motion estimation algorithm based on search pattern is performed in this paper.

本文提出了依据提升搜索速度的途径对运动估计快速算法进行分类的方法，并对基于模板块匹配的运动估计快速算法进行深入的研究。

After comparison and summing up of available fast block matching motion estimation algorithms, an adaptive motion estimation searching algorithm was proposed.

在综述和比较块匹配运动估计快速算法的基础上，提出了一种自适应的块匹配运动估计混合搜索算法。

The comparison is made about the RELAX and ML, the RELAX-AS and the ML-AP, The weightiest characteristic of the current estimation of the signal parameter in getting the new estimation in the RELAX-AS was found.

这种最大依赖性使得松弛算法的交替分离解法收敛速度非常慢-这是松弛算法的交替分离解法的严重缺陷，这种最大依赖性使得松弛算法的交替分离解法在有系统误差时能够有效地抑制局部极值，这是它的一个重要性能。

The paper investigates both block-type pilot linear minimum mean square error algorithm and IEEE802.16 OFDM channel estimation analysis. Simulation results confirm the block-type pilot structure is more suitable for IEEE802.16 system. An optimal pilot setting algorithm, based on space frequency domain, is explored and the pilot chart is presented. The proposed algorithm finds its application in MIMO-OFDM. Simulation results show the algorithm presents a good approximation to the perfect channel state information curve, with about 2dB difference in SNR. The simulation results also demonstrate the algorithm achieves fairly high stability in the environment of fast fading, performance of the proposed algorithm is better that of pilot training channel estimation.3. Taking into account the characteristics of IEEE802.16 OFDM system, OFDM system simulation platform is constructed in Matlab, exploiting simulink as a tool. OFDM modulation and demodulation simulation system are configured on LabVIEW platform. All the system signal processing is simulated, including defining system parameters, designing modulation model, and verifying all the proposed algorithms under different environments, such as white Gaussian noise, multi-path fading, with or without guard interval etc. Bit error performance is evaluated. The research provides valid theoretical basis for practical OFDM system performance evaluation.4. Taking advantage of software radio, the paper designs a hardware platform with both 256-IFFT/FFT and 512-IFFT/FFT OFDM schemes co-existing in one platform. You can predetermine one from the two schemes to carry out almost the same model function with different system performance and parameter setting.5. Referring to IEEE802.16 standard, the paper proposes a design method for generating signals and frames suitable for laboratory investigations implemented in laboratory environment.6. Based on 6701evm digital evaluation card, combined with analogy front-end, the paper designs a DSP software model to deal with baseband signal processing. An overall OFDM scheme, with modulation and demodulation function, is accomplished.

讨论分析了MIMO-OFDM中一种基于空频域的最优导频设置算法，给出了导频图案，通过仿真实验表明，该算法与理想的信道状态信息曲线非常接近，信噪比差距约在2dB左右，并且在快衰落条件下具有较好的稳定性，其性能要优于基于前导训练的信道估计方法。3、根据IEEE802.16OFDM系统特点，论文分别在Matlab中应用Simulink工具构建OFDM系统仿真平台、在LabVIEW平台上实现了OFDM调制解调仿真系统，模拟了整个系统的信号流程，进行了OFDM仿真系统参数的选择和调制模块的仿真设计、论证各算法性能，并根据各种不同的条件：例如高斯噪声、多径衰落、有无保护间隔等，对系统的误码特性进行了评估，为正确评价实际OFDM系统的性能提供了有效的理论依据。4、论文以软件无线电思想作为指导，提出了以256点IFFT／FFT为核心和以512点IFFT／FFT为核心的两种OFDM算法模式并存于同一个硬件平台、且可预选的方案，它们在参数选取和性能指标上有所差异，均实现了相似的模块和功能。5、论文参考IEEE 802.16无线网络标准的参数设置，针对本设计系统的应用环境和系统硬件的性能速率，提出了一种应用于实验室环境的信号结构、帧格式等参数设计。6、论文基于TI公司的6701evm数字评估板卡，结合模拟前端搭建数字中频平台，设计了基带处理的DSP软件模块并进行系统调试，基本实现了一套完整的OFDM调制解调方案。

On the basis of the investigation conducted in the shipyards within the jurisdiction of the Ministry of Communications,and in the light of the practical situation of a cerfain shipyard,this paper comes up with a pre-estimation method of the requirement of the specialist personnel, recommends a formula of the pre-estimation of the specialist personnel needed by ordinary shipyards,and probes into the mode of both the level of the formal schooling record and the ratio of specialities.

本文在交通部属修造船厂进行典型调查研究的基础上，结合某修造船厂的现状，对专门人才的需求从数量上提出了近期预测的方法，推荐了一般船厂的专门人才预测的公式，并探讨了合理的专门人才学历层次与专业比率的模式，作了可行性分析。

A fast direction of arrival estimation method of wideband sources has been proposed. A new techniques is presented to compute the focusing matrix. It needs no direction pre-estimation or matrix eigendecomposition, so the focusing matrices are insensitive to the signals' direction and the computation is simple.

提出了一种新的聚焦矩阵的计算方法，该方法不需要进行角度预估计，也不需要进行任何矩阵特征值分解，对信号方向不敏感，运算量小。

On the approximate uncorrelation property of DWT coefficients of LMSV process in the same scale and different scales, first the quasi maximum likelihood estimation method of parameters and the estimation method of volatility process of LMSV model are presented.

根据小波变换可将过程分解到不同的尺度上以及LMSV过程同一尺度下和不同尺度下DWT系数的近似不相关性，提出了建立局部似然函数的方法，又根据DWT系数和MODWT系数之间的关系，将局部似然函数表示为模型参数和局部小波方差估计的形式，并用该方法对中国股市收益进行了时变LMSV模型参数的估计。

"Second Life is remarkably easy to work with, and is very popular,"

"第二次生命是显着容易的工作，并且很受欢迎，"

For example, we usually assume that materials are homogeneous and isotropic and free of internal defects or flaws.

为了得到适合有限元分析的模型，我们必须经过如图2所示的简化步骤。