Is there directional smelling?

The aim of the present study was to establish the crucial precondition for directional smelling, i.e. the ability of humans to discriminate between odorous stimuli perceived either from the right or from the left side. When the pure odorants hydrogen sulphide or vanillin were used as stimulants localization was random. On the other hand stimulation with carbon dioxide or menthol yielded identification rates of more than 96%. These results established the fact that directional orientation, considering single momentary odorous sensations, can only be assumed, when the olfactory stimulants simultaneously excite the trigeminal somatosensory system.     

方向小波在图象边缘提取中的应用

作者提出了一种基于方向小波变换的边缘检测新算法。比较了方向小波变换和传统小波变换在图像边缘检测中的不同之处。分析得出方向小波变换更符合图像的方向，纹理特征，因而更能反映图像的边缘信息。经计算机仿真，效果十分良好。     

基于运动估计和边缘检测的隔行到逐行扫描图象的变换

提出了一种基于运动估计和边缘检测的隔行到逐行扫描图象的变换技术，这种方法对隔行到逐行扫描图象变换分成３种模式，并且提出了适合于隔行到逐行扫描图象变换的隔场运动估计和邻场运动补偿的方法，其中在运动模式和场内模式中都用到了方向性相关技术。     

Tb0.3Dy0.7（Fe,M）1.95合金的晶体轴向取向与磁致伸缩性能

研究了Ｔｂ０．３Ｄｙ０．７（Ｆｅ１－ｘＭｘ）１．９５（Ｍ＝Ｍｎ，Ａｌ，Ｂ，Ｔｉ，ｘ＝０．０３）合金在高温梯度区熔定向凝固过程中，晶体轴向取向，结晶形有晶体生长速度的变化规律和不同昌体轴向取向与磁致伸缩应变之间的关系，结果发现，晶体生长速度由低变，晶体由平面晶向胞状晶，胞技晶，树枝晶生长转化，晶体也相应地由〈１１０〉，〈１１２〉变化为〈１１０〉＋〈１１３〉＋〈１１２〉混合轴向取向，完全的〈１１２〉轴     

Geological and chronological evidence of Indo-Chinese strike-slip movement in the Altyn Tagh fault zone

A set of granitic and amphibole mylonite are exposed in the Altyn Tagh fault zone. The preliminary study shows that these rocks are the product of the syntectonic anatexis in the process of the left-lat- eral strike-slip shear, and are the result of the ductile transpression. There are two types of zircon sorted from the mylonite formed with synshear anatexis. Among them, one is the anatectic long columnar zircon and another is the residual metamorphic sub-rounded columnar zircon. Two groups of age for single zircon measured by ion microprobe (SHRIMP) are obtained: one is 461-547 Ma for the sub-rounded columnar residual metamorphic zircon, and the other is 239-244 Ma for the long-columnar anatectic zircon. This type of zircon is directionally spread in rock, and the long axis direction of its crystal is identical to that of stretching lineation, representing the direction of tectonic stress in the process of the strike-slip. 40Ar-39Ar age of the directional growth hornblende in the same mylonite sample measured is 223-226 Ma. The above geological and chronological data prove that the syntectonic anatexis occurred during Indo-Chinese Epoch, showing that the strong strike-slip movement occurred in the Altyn Tagh fault zone at least as early as Indo-Chinese Epoch.     

一种基于二元树复小波变换的特征提取

利用二元树复小波变换(DT CWT)良好的方向选择性和矩阵奇异值分解(SVD)的稳定性,作者提出了一种新的特征提取方法并用于车牌汉字识别.实验证明该方法比二维实小波变换具有更好的识别效果     

基于定向二维插值的逆投影变换方法

为了研究逆投影变换方法在智能车驾驶环境信息采集中的应用,提出了一种反向求解逆投影的方法,即根据用户感兴趣的道路区域规划逆投影变换后的图像,并考虑了车道线的方向特性,提出分段的定向二维插值方法求解逆投影变换后图像各个像素点的灰度值。理论分析和标定试验表明,使用该方法进行逆投影变换后的图像能够较好地反映客观路面情况,并且可以降低逆投影变换的计算量,强化车道线信息。     

定向井有杆泵抽油系统数学模型的改进

通过对有杆泵抽油系统进行井身曲线的空间分析,运用空间解析几何原理,求得相邻单位元的轴向夹角,在此基础上进行节点受力与位移的动力学分析,建立了有杆泵抽油系统的修正模型。并以马岭南 29-11(1993/11/09)的井身曲线为例,计算对比了模型与传统模型的区别,结果表明方法简单易行,也没有计算量的显著增加,且可以极大地提高计算精度。     

定向天线配置Ad hoc网络的MAC协议研究

对目前已提出的Ad hoc网中使用定向天线的MAC协议进行了分析、归纳，指出这些MAC协议中存在的问题以及设计一种有效使用定向天线的MAC协议应遵循的准则．最后，提出这类MAC协议应作的改进．     

陕北油田钻井技术总结

陕北油田钻井应采用两段制，可节约大量套管；采用SH11R、SH22R系列钻头和／或XHP2B钻头及合理的钻井参数可快速完井；无固相钻井液可保证井内安全，且成本低廉；定向井综合开发成本低。