横截面

We first use perturbative QCD theory to calculate the photon production cross section in nu- cleon - nucleon collisions at a center-of-mass energy of a few tens of GeV, taking into account the intrinsic parton transverse mo- mentum distribution and the next-to-leading-order contributions.

首先我们用微扰量子色动力学理论计算质心能量几十GeV核子核子碰撞中光子产生截面，同时考虑了部分子内禀横动量分布和二级费曼图的贡献。

Based on orthogonal function unfolding theory, the transverse fields can be represented as a superposition of waveguide modes. And according to coupled-wave theory, the time-dependent multi-mode coupling-wave equations (or the generalized telegrapher's equations) and the coupling coefficients among the different modes were deduced. The generalized telegrapher's equations are a set of coupled one-dimensional partial differential equations for the amplitudes of the modes.

应用正交函数的展开理论，将变截面波导中的电磁场表示为横电波和横磁波本征模式的级数；然后根据耦合波理论，推导了考虑波导金属壁有限电导率的变截面波导时域多模耦合波方程组及各模式间耦合系数的表达式。

Methods:Three-dimensional(3D) CT imaging reconstruction was performed in 200case of cervical spine without radicular symptom and injury.C_3-C_7 vertebral body horizontal diameter, sagittal diameter,high.vertebral gap.pedicle vertical diameter and horizontal diameter,coronary high,base long of vertebral uncus,space between vertebral uncus point.highness and width of intervertebral foramenand,transverse foramen,The CT data was transferred to a computer workstation,grouping with age and sex,statistical analysis.

材料与方法：选取200名不同年龄段无外伤、无神经症状和体征的受检者，进行多排螺旋CT薄层扫描，在计算机工作站上对获得图像进行多平面重建，获得相应截面图后，测量各相关指标，包括第3至第7颈椎(C_3-C_7)椎体横径、矢状径及高，椎体间隙，椎弓根的高与宽，冠状位钩突高度、钩突基底宽度、基底长、两侧钩突尖间距及基底长径角度，椎间孔高和宽，横突孔长和宽。按性别、年龄分组进行统计学分析。

Results］Parameters of mediolateral ,medial and latera anteroposteriordimensions and the aspect ratio of the resect proximal tibia surface were obtained. The parameters were confirmed by statistics analysis.［Conclusion］The geometry and anatomy of the knee in Chinese people have significant differences from the western people.

结果］获取正常胫骨近端截面内外侧前后径、横径、前后径与横径的比值，内外侧前后径、横经、前后径与横径的比值在不同性别的差异具有统计学意义，内外侧前后径、前后径与横径的比值在不同截骨面高度的差异具有统计学意义。

Simultaneously founding the mechanical modelof the seeder and analyse engine's libration when it was running at 50r/s,42r/s,38r/s,25r/s,7r/s influence on arranging seeds and use damping spring and latex to reduce libration about this part. Analysed the treading and swerving capability of the Paddy direct-seeding machine. Research results indicate: only boat motherboard's front across baffle's angle is 30 degree, the section shape of motherboard is undee, depth of section is 30mm, direct seeding engine stepped resistance and soil is least, turning

研究结果表明：当船底板前横挡板角度为30度、底板截面形状为波浪形、底板截面深度为30mm时，直播机在行走时行走阻力最小，壅土最少，转弯时转弯阻力最小；当发动机38r／s时，发动机对排种盘的振动影响最大，加刚度为100N／mm的减振弹簧或厚度为35mm的橡胶后，排种盘的振动量会大大降低，减振后的振动对排种无重大影响；仿真结果还显示，排种器力学模型、直播机行走、转弯性能和排种性能合理。

We pointed out again that the inclusion of the intrinsic transverse momentum distribution of partons leads to an enhancement of photon production cross section in the region of photon trans- verse momenta of a few GeV/c.

结果表明考虑部分子内禀横动量分布导致在光子横动量为几个GeV／c区域内光子产生截面的增加。

And the absolute value of all the count of control capability is used to analyze the degree of earnings management, which is the explained variable. The above 3 study hypothesises are validated by multi-linearity-regression-analysis method using the statistic analyses software SPSS 15.0. On the regression analyses, there are two times of multi-linearity-regression.

然后，。。。更多采用修正的横截面Jones模型来度量关联交易对盈余管理的影响，以操纵性应计数的绝对值来度量盈余管理的程度，即为被解释变量，采用多元线性回归模型来验证本文提出的3个研究假设，并借助SPSS15.0统计软件。

Research on the natural attribute of water resources is the stretch of hydrology in hydrologic cycle, and the knowledge in water resources involve hydrology, engineering, environmental science, management science, economy and etc..

水资源的自然属性的研究是水文学在水文循环领域的延伸，而水资源学的知识是水文学、工程科学、环境科学、管理科学、经济学等学科在伸向水资源领域的横截面。

Al-Si alloy wires with uniform cross section and very fine grains could be fabricated stably under the conditions that the interior diameter of nozzle was 0.25-0.5mm, Ar pressure was about 0.4MPa, cooled liquid flowing rate was 400r/min, melt jet flying distance was 5-10mm, melt jet entrance angle was 35°~45° and the melt superheat degree was 100~150℃.

结果表明，在喷嘴直径为0.25~0.5mm、氩气压力为0.4MPa、旋转鼓转速为400r/min、合金液飞行距离为5~10mm、合金液入射角为35°~45°及合金液过热度为100~150℃的条件下，可稳定获得横截面圆整一致、晶粒细小的合金线。

The treadmill training of T-group rats were continuously trained for 4~6 weeks at the intensity of about 75% VO2max (18??5～24m／min,gradient of 0°,each motion lasting 50 minutes,twice a day). Detect the content of gastrocnemius MHC mRNA by gastrocnemius reverse transcription polymerase chain reaction,and detect the changes of MHC muscle fiber and its size of cross section area through immunohistochemistry. Meanwhile,apply the electric stimulation to determine the maximal tension of isometric contraction of post-training gastrocnemius.

运动训练组大鼠进行连续4～6wk强度约为75％VO2max(18.5～24m／min，坡度为0°，每次运动50min，每天2次)的跑台训练，反转录聚合酶链式反应腓肠肌MHC mRNA含量，以免疫组化方法检测肌球蛋白肌纤维的改变情况及横截面积的大小，同时运用电刺激观察训练后腓肠肌等长收缩最大张力。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。