The gliding longitudinal wave contains three parts, longitudinal wave beam, negative exponential gliding ivro-tational wave and positive exponential gliding irrotational wave.
滑行纵波系由纵波声束、负指数滑行集散波和正指数滑行集散波三种成份所组成。
The beam characteristics with positive and negative branch unstable resonators were compared for end-and edge-pumped lasers.
在端面抽运和边缘抽运时，比较了正支和负支非稳腔的输出光束特性。
Objective To investigate the image features and clinical values of electroencephalogram(EEG)and brain electrical activity map(BEAM)for the mild brain injury without positive presentation on CT scan.
目的研究脑CT检查为阴性的轻型颅脑损伤的脑电图（EEG）、脑电地形图（BEAM）变化特点及其临床价值。
A series of giant positive magnetoresistance of magnetic multilayer structure were fabricated by ion-beam sputtering in high vacuum with applied magnetic field and treatment.
采用离子束溅射方法制备了正巨磁电阻多层膜，在制备过程中采用外加磁场和退火处理。
The existence of solution and positive solution is considered for a fourth-order nonlinear elastic beam equation with derivatives of all orders.
考察了一类非线性四阶弹性梁方程的解和正解的存在性。
Only positive Helmholtz equation is considered in beam propagation method, while the negative component is approximately zero.
在光束传输法中只分析前向亥姆霍兹方程，而后向分量近似为零。
The existence of solution and positive solution is considered for a fourth-order nonlinear elastic beam equation with derivatives of all orders.
考察了含有各阶导数的一个4阶非线性弹性梁方程的解和正解的存在性。
Through broadening area of positive light beam, the invention improves discharging efficiency.
本发明通过扩大阳性光柱区域，提高放电效率。
The width and height of the beam section and the slab have positive effect on the ultimate strength of the joints.
梁截面宽度、高度和楼板都对试件的承载力有影响。
The width and height of the beam section and the slab have positive effect on the ultimate strength of the joints.
梁截面宽度、高度和楼板都对试件的承载力有影响。
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