区时

We have studied modulation instability of linearly polarized light not only in anomalous dispersion regime but also in normal dispersion regime when the intensities along the two birefringence axes are equal.

利用光脉冲在光纤中传播时所遵守的相干非线性薛定谔耦合方程，研究了偏振方向沿两个双折射轴的分量强度相等时，在反常色散区和正常色散区所产生的调制不稳定性。

We have studied modulation instability not only in an anomalous dispersion regime but also in a normal dispersion regime when the angle between the polarized direction and the birefringence axes is arbitrary.

利用光脉冲在非线性双折射光纤中传播时所遵循的相干耦合非线性薛定谔方程，研究了偏振方向与双折射轴成任意角度时，在反常色散区和正常色散区所产生的调制不稳定性。

In addition, the study area can be layered vertically and decomposed horizontally by the properties of the soil and then the inte rfaces of every layer and region are connected by proper physical condition. So the initial and boundary value problem is well posed .

模式模拟时可依土壤之性质将整个模拟区域做垂直方向分层与水平方向分区之处理，计算时层与层之间、区与区之间再以适当之物理连接条件连接，使其构成一适当之问题。

When analyzing its working condition, we should sufficiently consider if the IV system is in linear amplificatory area or in saturated area.

文章摘要：在电子技术教学中，分析运算放大器系统时，应根据运算放大器系统的反馈情况，判断它的工作状态；分析工作状态时，要充分考虑运放系统是处于线性区还是饱和区。

The section thickness was 5mm,the best section was selected before injection of nonionic contrast material, hen nonionic contrast material l.5m1/kg were injected via the antecubital vein in the rate of 2ml/sec, two serial scannings were obtained began at 6s and 2mm, for the first series the scanning internal was 3 seconds, for the second series, the scanning internal was 7 seconds.3 Methods of studying figureThe CT numbers of lesion on plain CT and on contrasted CT at serial phases were recorded, on which the time-intensity was produced.

计算出不同时相时的CT增强值，绘出动态增强曲线。在不知道病变病理结果的情况下，由三位有经验的医师在不知道病理结果的情况下记录上述病例的动态增强模式及其动态变化。 4。增强峰值与肺血供来源和血管密度的关系的评价其中32例准备手术的SPN，术前行CT同层动态增强扫描后测量增强后第一次循环肺动脉期与主动脉期CT值。然后分别与平扫时CT值比较；术后对瘤体CT测量兴趣区取材并行HE染色，随机取5次，在放大40倍的显微镜下观察5mm范围内直径0.02～0.1mm和＞0.1mm的微血管数目，5次的平均值颀士学泣衫艾中文赂要即为兴趣区对应的血管数目，井将其与瘤体增强峰值作相关性分析。

Using the results of photographical experiment,analyzing the development of combustion and building two parts in chamber. By the characters of two parts of chamber,establishing time model.

基于已燃区和未燃区等燃烧特征，建立声学时域计算模型，开展单点和多点激励状态下的燃烧室压力波瞬态响应计算，研究燃烧室压力场的时域特性和变化规律。

In land areas with highvelocity rock outcrops,the seismic data recorded by vertical geophone deviate from the data of reflected compression wave with the increment of dip angle of strata and incident angle of reflection wave,which results in the difficulties of conventional seismic exploration in the near-surface high-velocity rock outcropped areas.

结果表明，当近地表速度为低速时，可以将垂直检波器记录的地震记录近似等同于反射纵波记录，这就是常规地震勘探在低速带区勘探取得成功的原因之一；当近地表速度为高速时，随着界面倾角和入射角的增加，垂直检波器记录的地震记录等效为反射纵波记录的误差增大，这就是存在高速近地表区地震勘探的难点之一。

We found that neither the fusioned nor the non-fusioned forms of Hu-P68 cDNA open reading frame could express efficiently in the E. coli cells; in different prokaryotic expression vectors and under various promotors resulted in no distinctive variations. Deletion of 5'UTR by synthesis adaptors, deletion of 3'UTR or signal peptide sequence by PCR gained no gross improvement. Only the truncated API-I proteins were observed to be highly expressed when the 3'ORF fragment of the Hu-P68 cDNA was fusioned at the 3'end of PAI-I gene.

结果发现无论是以融合形式存在，还是以非融合形式存在，人的P68 cDNA基因在E.coli细胞中都未能获得高效表达：在不同表达载体中，不同启动子对P68 cDNA基因的表达没有显著差异；利用合成Adapter的方法删除5'UTR，及利用PCR技术删除3'UTR和信号肽序列对表达没有明显改善；分别表达被分割的P68 cDNA5'端编码区、中央编码区和3'端编码区均未见有明显表达；当P68 3'端编码区与高效表达蛋白PAI-Ⅰ基因3'末端融合时，仅见有PAI-Ⅰ以截断形式高效表达出来。

A self-converse Mendelsohn packing design of order v, denoted by (v, k,1)-SCMP, is defined to be a triple, where B is a collection of k-circuit of X such that every ordered pair of distinct points of X appears in at most one block of B, and / is a permutation on X such that Here, and whenB=(x0 ,x1,xk-1). The number of blocks in a (v, k, 1 )-SCMP is upperbounded by where 1 if v=l ande =0 , otherwise.

一个阶为v，区组大小为k的自反Mendelsohn填充设计，记为—SCMP，定义为一个有序三元组，其中X为v元点集，B为X的一族循环有序k元组，f为X上的一个置换，它满足如下性质：(1)对任意x，y∈X，x≠y，有序对至多包含在一个区组中；这里区组当且仅当和一个—SCMP所含的区组个数不超过，其中当V(v-1)≡1时，ε=1；否则ε=0。

The results show that the plasticity zone and dynamically quiescent layer become fine equiaxed recrystallisation under the thermo-mechanical effect, the grains in the heat-affected zone grow up because of the effect of friction heat. When the rotation speed is 2 500 r/min and the welding time is 12 s, good joint is achieved, and the tensile shear strength of the joint reaches 9.24 kN. The tensile shear strength of spot increases with increasing tool rotation speed, with increasing welding time, the strength increases first, while then reduces. The microhardness of plasticity zone is high, but is slightly lower than that of the base metal, the minimum value of microhardness is in the heat affected zone. When the energy input of joint is high, the fracture type of spot is mode Ⅰ, and the tensile shear strength is high; on the contrary, when the energy input of joint is less the fracture type of spot is mode Ⅱ, and the strength is low.

结果表明：塑性区和动态静止层的晶粒在热和力作用下发生动态再结晶形成细小的等轴晶，热影响区的晶粒在摩擦热作用下长大变粗；搅拌头旋转速度为2 500 r/min，焊接时间为12 s时，可以获得力学性能较好的焊点，焊点的剪切强度达到9.24 kN；焊点的剪切强度随搅拌头旋转速度的增大而增大，随焊接时间的延长先增大后减小；塑性区的显微硬度较高，但略小于母材，接头显微硬度的最小值分布在热影响区；焊点热输入量较多时，接头为Ⅰ型断裂，焊点的剪切强度较高；焊点热输入量较少时，接头为Ⅱ型断裂，焊点的强度较低。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。