截面

Using image processing technology, we analyze the size and shape of cell wall crystal region of bamboo's cross section during entire growth from bamboo shoot to the mature bamboo. Using region segmentation, we study the forming and distributing characteristic of crystal regions of the fiber cap、 proto-sieve 、 thin-walled cell of vascular bundle of bamboo's cross section.

本文应用图像处理技术分析了竹材从竹笋到成竹整个生长阶段横截面细胞壁结晶区的大小及形态，并应用区域分割法研究了竹材微管束横截面中的纤维帽、筛管、薄壁细胞等各部分结晶区的形成过程以及分布特征。

This paper puts forth the method of equivalent section for the analysis of symmetrically reinforced masonry compression member with rectangular section and small eccentricity , studies its accuracy and unifies the methods for such similar sections in reinforced masonry structure and RC structure.

提出了配筋砌体矩形截面小偏心受压构件对称配筋的等效截面法，论证了其精确度，使此类砌体构件和混凝土构件在计算方法上达到统一。

Temperature field of cross section, full curve under fire and related factors of them are analyzed.

5对轻钢-混凝土组合梁的抗火性能进行了研究：分析了截面的温度场及其影响参数；计算了构件的抗火全过程曲线，并分析了截面参数对全过程曲线的影响；采用抗力折减系数的方法研究了轻钢-混凝土组合梁承载力随受火时间的变化，并分析了各参数对抗力折减系数的影响

The modulation of cross section is obviously,the intensity of it is smaller as the circular aperture is bigger and the intensity is bigger as the circular aperture is smaller.

平顶高斯光束经过圆孔衍射，孔径大时光强在横截面调制越厉害，但是强度小；孔径小时光强在横截面调制相对小，但是光强度相对大。

The curves are compared which are obtained from three sets of damping oleo-hole with different constant section area under the same structure parameters and initial filling parameters.

经与3组不同直径常截面油孔在同样结构参数和初始填充参数下曲线的对比分析，证明采用变截面油孔缓冲器优化前起落架突伸性能的合理性。

Moreover,according to this method,the deflection curve equation of other kinds of variable section beam will be also carried out.

本文利用积分法求出了变截面悬臂梁在各种不同载荷作用下的挠曲线方程，而对于其它类型的变截面梁，都可以按照这种方法去求解。

For strengthening the supervision and management of temperature field of concrete and the temperature difference between inner face and surface,the heat sensors are buried in typical sections of concrete in different part and depth in order to test the temperature of each typical section and draw the temperature field graph and temperature drop graph which can guide the task of temperature lowering and thermal retardation.

为加强对浇筑体温度场与内表温差的监测与管理，通过采用在混凝土不同部位及深度的典型截面埋设热传感器，测试各典型截面的温度，及时绘出温度场、温降曲线图，一方面可指导降温、保温工作的进行；另一方面可通过测温总结出大体积混凝土的温度变化和分布规律，为以后在铁路客运专线桥梁工程的施工中防止大体积混凝土出现有害裂缝提供有价值的参考数据和方案。

The fission barrier parameters for actinide nuclei were obtained by analysis and calculations of fission cross-sections and complete neutron reaction cross sections.

通过分析和计算锕系核裂变截面和全套中子反应截面获取了一组锕系核的裂变位垒参数。

X=0, 11, 22, 33, 44, and 55 borophosphate glasses series have investigated, and it is found that:(1) both the covalency bonding between Yb〓 ion and oxygen ion and the asymmetry in local structures surrounding Yb〓 ion have strong effects on integrated absorption cross section ∑〓 and emission cross section σ〓 of Yb〓 ion in borophosphate glasses;(2) the borophosphate glasses and borate glasses appear superior as Yb-gain media to the phosphate glasses, although the phosphate glasses have been demonstrated as the most appropriate Ndgain media.

在第二章中，我们对〓（x=0，11，22，33，44，和55）系列的掺Yb〓硼磷酸盐玻璃的吸收光谱和发射光谱特性进行了研究，结果表明：（1）在硼磷酸盐玻璃中，Yb-O键的共价键成分和Yb〓离子周围的近邻结构的对称性两个因素对积分吸收截面∑〓和受激发射截面σ〓的影响都很大；（2）尽管磷酸盐玻璃是最合适的掺钕激光增益基质，但是作为掺镱的激光增益基质，硼磷酸盐玻璃和硼酸盐玻璃都要优于磷酸盐玻璃。

The results show that space finite analysis results are close to test ones, bottom chords suffer axial force and large in-plane bending, and the max stress is nearby each middle internode. The max stress of node crossbeams occurs in No.2 bottom flange, and that of internode crossbeams happens in ones lying in the middle of every internode. The concrete slab is in tension at the longitudinal direction, and also suffers bent at vertical loads. The degree of completely-composite model taking part in the combined actions is about 55%, while that of semi-composite model is 42%-43%. The combination of concrete slab and bottom chord increases the degree of floor system taking part in the combined actions, lightens the burden of bottom chord, and reduces out-of-plane bending of node crossbeams especially the ones near bridgehead. Stress and displacement of main truss can be evaluated by a equivalent plane rigid frame in preliminary design, and effective stiffness of bottom chords are composed of original ones and concrete slab, and the concentrated load from deck can be translated into uniform load.

研究结果表明：空间有限元分析结果与试验结果较吻合；下弦杆受到轴向拉力和较大的面内弯矩作用，各节间最大应力出现在节间中点附近；节点横梁最大应力发生在横梁2的下翼缘，节间横梁最大应力发生在位于端节间中部的小横梁上；混凝土板顺桥向整体受拉，并在竖向集中荷载作用下产生弯曲变形；全结合模型大部分节间内的桥面板参与主桁共同作用的程度为55%左右，半结合模型桥面板的参与程度为42%~43%；桥面板与下弦杆结合能够增加桥面板的参与程度，减轻下弦杆荷载，减少节点横梁尤其是靠近桥头横梁的面外弯曲；对桥梁进行初步设计时，主桁杆件的位移与内力可按照1个等效的平面刚架计算，下弦杆的等效刚度由原下弦杆截面和混凝土桥面板截面组合而成，桥面荷载可转化为均布荷载施加。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷