相依样本下条件密度双重核估计的强相合性

设（Ｘ１，Ｙ１），…，（Ｘｎ，Ｙｎ）是从取值于Ｒ＾ｐ×Ｒ＾ｑ的随机向量（Ｘ，Ｙ）中抽取的随机样本，在给定Ｘ＝ｘ的条件下Ｙ具有条件密度ｆ（ｙ│ｘ）。在本文中，我们考虑ｆ（ｙ│ｘ）的通常的和递归形式的双重核估计ｆｎ（ｙ│ｘ）＝ｎ∑ｉ＝１Ｋ１（Ｘｉ－ｘ／ａｎ）Ｋ２（Ｙｉ－６／ｂｎ）／〔ｂｎ＾ｑｎ∑ｊ＝１Ｋ１（Ｘｊ－ｘ／ａｎ）〕ｆｎ（ｙ│ｘ）＝ｎ∑ｉ－１Ｋ１（Ｘｉ－ｘ／ａｉ）Ｋ２（Ｙｉ－ｙ／ｂｉ）／ｎ∑ｊ     

离散阵的W—S综合法－Woodward法改进

本文给出的Ｗ—Ｓ综合法，利用样本函数的性质，对Ｗｏｏｄｗａｒｄ法进行了改进，用较少的单元就可以综合出相同效果的方向图。若单元数目相同，Ｗ－Ｓ法综合的方向图更逼近样本函数，且天线的波瓣较窄，增益较高。     

Assessing total differences variations in color,for effective samples having coarseness,and glint

Effect coatings have the unique property of large change of appearance under different viewing conditions. This results in quality control problems of related products. In this letter, samples of metallic panels with effect coatings are visually assessed and measured. Based on experimental results, we propose formulae to predict precisely the total differences of effective samples in terms of variations in color, coarseness, and glint. Under diffused illumination, the total difference formula includes color difference and coarseness difference. Under directional illumination, the total difference formula includes color difference and glint difference.     

Rare decays of the tau lepton at Belle

We report recent results of searches for lepton flavor violation and second class current in decays of τ leptons using the data sample collected in the Belle experiment at the KEKB electron-positron asymmetricenergy collider.     

3G竞逐之湖北样本

湖北3家运营商将在5月17目前后全面商用3G业务,目前各方都处于3G建网的冲剌阶段,激烈的全业务竞争将在不久的将来打响。     

Optimization design and realization of Gaussian apodized sample gratings for narrowband wavelength selectivity filters

A sample fiber Bragg grating（SFBG） with Gaussian apodization profile is designed and optimized for the narrowband wavelength filter,and the relevant conclusions provide a guide for the further filter fabrication.With the grating length limited,a narrowband（5 GHz） grating filter used in the radio over fiber（ROF） system is fabricated,which has insertion loss of 3.463 dB,sideband suppression of 24.21dB,3 dB bandwidth of 40 pm,and 20 dB bandwidth of 106.3 pm.     

基于脉冲样本图的雷达辐射源识别方法

雷达辐射源识别是雷达对抗侦察信号处理的关键环节。由于现代雷达体制日益复杂,传统的辐射源识别方法面临着越来越严峻的问题。因此针对这种情况,提出了一种基于脉冲样本图雷达辐射源识别算法。这种算法无需对相互叠加的雷达辐射源信号进行完全分选,并且不需要进行传统识别方法中的特征提取过程,简化了处理环节。在脉冲流密度适中的情况下,该算法具有很好的判别准确率。仿真结果验证了该方法的可行性和实用性。     

参数未知下基于定数截尾样本监控指数分布的控制图设计北大核心CSCD

实际应用中,过程的目标参数常常未知,需由第Ⅰ阶段数据集估计得到.不同的第Ⅰ阶段数据集会导致目标参数的不同估计值和不同的控制图控制限,因此也意味着不同的控制图表现.对于某个实际工作者而言,最可能的情况是他手中仅有一个第Ⅰ阶段数据集,因此研究基于一个给定的第Ⅰ阶段数据集所构建的控制图表现,即条件表现更具现实意义.该文研究了参数未知时针对定数截尾样本数据指数分布控制图的条件表现,推导出了参数估计下控制图条件平均链长的精确分布,并利用条件平均链长分布及其数字特征评价了参数估计对控制图表现的影响,结果显示参数估计严重影响着控制图的表现.于是,又提出了精确分析方法设计了具有理想条件表现的控制图.最后用一个例子说明如何执行本文所提控制图.     

负超可加相依样本密度函数核估计的相合性

本文研究负超可加相依样本的密度函数核估计相合性.利用负超可加相依序列的不等式与性质,获得了密度函数核估计的逐点相和性和一致相和性以及r阶矩相和性.     

Bootstrap approximation of wavelet estimates in a semiparametric regression model

The inference for the parameters in a semiparametric regression model is studied by using the wavelet and the bootstrap methods. The bootstrap statistics are constructed by using Efron＇s resampling technique, and the strong uniform convergence of the bootstrap approximation is proved. Our results can be used to construct the large sample confidence intervals for the parameters of interest. A simulation study is conducted to evaluate the finite-sample performance of the bootstrap method and to compare it with the normal approximation-based method.