问卷备择答案等距离量化合理性的验证方法初探

目的 :探讨验证问卷备择答案等距离性的方法。方法 :计算去除某条目后 ,同领域其他条目得分的合计值 ,然后观察选择该条目不同备择答案的人群 ,其合计值间是否等距离。测试量表采用 3 6条目简明量表 ,调查样本 2 2 5 0人 ,纳入分析样本 2 2 46例。结果 :使用该法能够发现问卷中的异常条目 ,等距离性验证结果与原量表设计基本吻合 ,但是测试条目必须具有较好的结构效度。结论 :同领域条目相互验证可能是验证备择答案的等距离性的一种简易方法 ,对此尚需数理学论证。

WSN中改进的分布式多维定标定位算法

针对无线传感器网络经典集中式多维定标MDS-MAP算法在定位精度与矩阵计算复杂度方面的不足,提出一种基于分布式的ADMDS-MAP定位算法。该算法通过采用测定距离量化,得到节点的近邻向量(CNV),然后通过相关的估算算法得到距离矩阵D和节点的初始估值,加入适当的求精计算得到节点的精确位置。理论分析和仿真实验表明,改进算法能够提高节点的定位精度。

基于改进的重心插值提高脉冲雷达测距精度的研究

由于采样率的约束,雷达回波信号脉压结果是一系列离散的采样点,用脉冲法实现雷达测距时会产生距离量化误差,需要对脉压波形峰值时间作插值估计。针对传统重心插值法存在固有误差较大的问题,提出了一种改进的重心插值法。结合先验信息,通过在较高采样率下作仿真实验,得到脉压结果主瓣内不同位置下采样最大值和相邻次大值点的幅值比与脉压波形峰值位置的一一对应关系,利用这一关系对实际采样率下主瓣内的采样最大值和相邻次大值点作重心插值处理,实现对脉压波形峰值时间更精确的预估。实验结果表明,通过所提出的方法可以显著减小距离量化误差,提高雷达测距精度。

Δ-伪度量族与Menger概率度量空间

引进了Δ－伪度量族概念，研究了Ｍｅｎｇｅｒ概率度量空间与Δ－伪度量族生成空间的关系，证明了每个Ｍｅｎｇｅｒ概率度量空间（Ｅ，Ｆ，Δ）都可由Ｅ上的一个Δ－伪度量族｛ｄλ｝λ∈（０，１）所确定．

宽带DRFM有源欺骗干扰识别

本文针对基于数字射频存储(DRFM)转发的宽带距离-速度(RGS-VGS)同步欺骗干扰的识别问题,建立了宽带RGS-VGS干扰的量化模型,并利用干扰的量化特性提出了一种基于神经网络(BP)的干扰识别方法。宽带干扰信号经DRFM量化后,其频谱中包含一系列假谱,假谱的位置与量化位数有关,其谱宽及调频率都变大。利用干扰误差角(JSEA)衡量信号频谱间的差异程度,并作为神经网络识别的特征参数。实验结果表明,在低量化位数条件下,宽带干扰能够在较低的信噪比条件下被正确识别。

一个基于语音识别的盲人上网辅助系统的设计

针对目前一部分残障人士(如盲人等)面临的上网困难问题,本文通过语音识别和文本-语音转换两个部分的设计及运用,设计一个基于语音识别的盲人上网辅助系统。系统的语音识别部分,采用了线性预测(LPC)及矢量量化的距离(VQ)方法,过滤和识别人的语音信号;文本-语音转换部分,通过对每个动态打开的网页,采用文字转化成语音(text-to-speech,TTS)技术及语音合成平台完成语音合成,将其网页文本内容朗读出来,同时也可对用户进行语音提示。

Substantial study on the occupation development of gender equality

Men and women participate in many social activities through professional roles.The main content of this study is the occupation development gender equality,which is a recessive change of quantity.Therefore,we cannot concretely measure it to some extent,but through the structure square distance model and employees' feeling about the process,we can reflect its difference.The results of studying the feelings of male and female employees show that the gender equality is a problem,and there is a difference for men and women in career development.

Quantifying Design Parameters of Symbology Page for Automotive Head up Display

This paper gives an overview of studies on parameters displayed on the Automotive Head Up Display （A-HUD） including calculation and construction of symbology page based on study results. A study has been made on vital parameters required for car drivers and design calculations have been made based on design parameters like field of view, distance from the design eye position, minimum character size viewable from a distance of 1.5m between driver and the projected image, and optical magnification factor. lhe display format suitable for A-HUD applications depends upon the parameters required to be displayed. The aspect ratio chosen is 4：3. This paper also provides method to design the symbology page embedding six vital parameters with their relative positioning and size considering relative position between display device and optical elements which has been considered with a magnification factor of 2.5. The field of view obtained is 6.7° × 4.8°.

Data organization and management of mine typical object spectral libraries

With the development of mining industry,people have obtained profits from it,but they are facing environmental damages.In order to monitor these environmental changes,a spectral library is set up for the spectrum data organization and management of mine typical objects.Most of the spectrum data come from the long-term field measuring in mining area and other spectral libraries.For the data quality control and error detection in the measuring data,an inner precision calculation method is presented and a series of interactive graphical controls are developed for the spectrum visualization and analysis.Through extracting and saving spectrum characters for the mine typical objects,realizs spectrum matching and classification for new measured spectrum samples are realized by using Euclidean distance,Aitchison distance,Pearson correlation coefficient and vector angular cosine methods.Based on the matching result,this work is able to gather dynamically physicochemical environment parameters from the library and gives an early warning for the mine environmental changes.

Quantum hyperentanglement and its applications in quantum information processing

Hyperentanglement is a promising resource in quantum information processing with its high capacity character, defined as the entanglement in multiple degrees of freedom(DOFs) of a quantum system, such as polarization, spatial-mode, orbit-angular-momentum, time-bin and frequency DOFs of photons.Recently, hyperentanglement attracts much attention as all the multiple DOFs can be used to carry information in quantum information processing fully. In this review, we present an overview of the progress achieved so far in the field of hyperentanglement in photon systems and some of its important applications in quantum information processing, including hyperentanglement generation, complete hyperentangled-Bell-state analysis, hyperentanglement concentration, and hyperentanglement purification for high-capacity long-distance quantum communication. Also, a scheme for hyper-controlled-not gate is introduced for hyperparallel photonic quantum computation, which can perform two controlled-not gate operations on both the polarization and spatial-mode DOFs and depress the resources consumed and the photonic dissipation.