两对称

In this paper, the adjointness of the product of two differential operators generated by a third order normal and singular symmetric differential expression in the limit-circle case is discussed. The necessary and sufficient conditions which make the product operators being the adjoint operators obtained by the matrix analysis and calculation. At the same time, the adjointness of the product of the power and adjointness operator obtained.

本文首先讨论了正则和奇异两种情况下两个极限圆型三阶对称微分算式生成的微分算子的乘积的自共轭性，运用矩阵分析和计算，得到了乘积算子为自共轭算子时边界应满足的充分必要条件，同时得到了幂算子的自共轭性、自共轭算子乘积的自共轭性等乘积算子的其它若干性质。

And the numerical solutions of difference equation are regarded as the approximate solutions for the differential equation.

文中首先对对称正则长波方程提出了一个两层和两个三层的有限差分格式。

At the same time, we can determine the symmetry degree of the two edges on the parts by comparing the distance form the parts center to the edge.

通过比较零件从中心到两切边的距离差，确定零件两切边的对称度。

This paper tries to analyze the lexicalization in disyllabic words of three kinds of synonymous symmetrical Chinese Four-character Phrases, so as to find some rules of lexicalization in Chinese words.

本文试图通过对三类两两并列联合的同义对称结构的四字格所映射的汉语双音词的"词化"现象进行观察和分析，揭示出汉语词化的某些规律性倾向。

In chapter 3, we made a discussion for the effective Hamiltonian which govern the decay processes of B meson, the derivation and their renormalization group evolution of the Wilson coefficients, and collected all formulas needed in our calculation.

论文的工作部分包含第四、五两章。在第四章，作者分别在标准模型和最小超对称模型下计算了b→sγ和b→sl~+l~-两类衰变过程的分支比，并根据相关实验数据，得到了对部分质量插入参数δ_

The author investigates the effect of mean stress and stress's amplitude with the non symmetry low cycle fatigue experiment of two kinds of PD3 rail steel (hot rolling and off line heat treatment) produced by PanZhiHua steel company.

通过对攀钢生产的两种PD3钢轨钢(热轧和离线全长热处理)的非对称低周载荷疲劳实验，比较了平均应力和荷载幅值对两种PD3钢轨钢寿命的影响。

The flywheel has a shape formed by rotation, around the rotation axis, of a geometric figure symmetric about the rotation axis and the axis perpendicular to the rotation axis, and split into two parts (2, 3), e.g. of equal volume, by a plane passing at an angle greater that forty five degrees and smaller than ninety degrees to the rotation axis, the two parts being rotated relative to each other around the rotation axis at an angle no greater than ninety degrees.

所述飞轮具有由相对于旋转轴线和垂直于该旋转轴线的轴线对称的几何图形围绕旋转轴线旋转所形成的形状，并被与旋转轴线成大于45度小于90度角的平面分成两部分(2、3)，例如等体积的两部分，所述的两部分围绕旋转轴线以不大于90度的角度彼此相对于旋转。

The coordination geometry of the Eu atom is best described as a strongly distorted square-antipyrism.. The two Eu atoms are bridged by two N-oxide oxygen atoms forming a dimeric unit with crystallographic inversions centre. The Eu……Eu distance is 4.2137(9)〓. The two europium atoms and two bridging oxygen atoms is coplanar. The angles of Eu(1)-O(7)-Eu(1A) and O(7)-Eu(1)-O(7A) are 117.82(14)° and 62.18(14)°, respectively. 15 is the first dinuclear triboluminescent lanthanide complex reported.

同时还测定了其摩擦发光光谱与其光致发光光谱，并讨论了晶体结构和摩擦发光活性之间的关系。X-射线结构分析表明，15为有对称中心结构的配合物，每个Eu与三个HTTA的六个O原子和两个PyO的两个O原子形成八配位的四方反锥几何构型，2个N-Oxide O原子桥联两个Eu，形成了一个双核配合物，Eu。。。。

Derrick on Tianlun and rope set up the runway, the installation of hoists, winches double (3t) double rope traction, transport staff and lining materials; hoists the runway with a winch (2t) to tighten, In addition, the site symmetry at the bottom of the derrick cantilever mast for two, with two winches (3t) upgrading of materials, two separate winch (1t) Luffing operation.

井架上设天轮和钢丝绳跑道，装置吊笼，用双卷扬机（3t ）双绳牵引，运输人员和内衬材料；吊笼跑道用一台卷扬机（2t ）收紧，另外，在井架底部对称部位设悬臂桅杆两台，用两台卷扬机（3t ）提升物料，另设两台卷扬机（1t ）变幅操作。

The invention discloses an organic compost turner, which consists of a turning part and a walking chassis. The walking chassis includes a chassis frame, a power part, a power transmission device, and a walking wheel. The invention is characterized in that: the turning part, arranged above the walking chassis, includes a motor frame, a major motor arranged on the frame, a transmission mechanism, and two horizontal scraper conveying chain mechanisms arranged symmetrically. The front end of the motor frame is arranged on the chassis frame of the walking chassis. The master motor drives the two horizontal scraper conveying chain mechanisms through the transmission mechanism. Scrapers of the two scraper conveying chain mechanisms move from the external side to the internal side at the front end of the turning part separately.

本发明公开了一种有机堆肥翻抛机，该机由翻抛部件和行走底盘组成，所述行走底盘包括底盘架、动力部件、动力传动装置和行走轮，其特征在于：所述翻抛部件设置在行走底盘的上方，其包括机架和安装在机架上的主电机、传动机构及对称设置的两个卧式刮板输送链机构，所述机架前端向下倾斜安装在行走底盘的底盘架上，所述主电机通过传动机构驱动两个卧式刮板输送链机构，两个刮板输送链机构的刮板分别在翻抛部件的前端从外侧向内侧运动。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。