圆形地

The largest of the rooms inside the West Wing is the Oval Office of the President, the ground with a huge blue carpet, Carpet center organized and president of the United States Emblem : Arrange 50-round, around accipiter.

其中最主要的厅室是西翼内侧的椭圆形总统办公室，地上铺着一块巨大的蓝色地毯，地毯正中织有美国总统的金徽图案：50颗星排列成圆形，环绕着一只鹰。

The modal tests of PCB and PCB assembly (free boundary condition and fixed boundary condition) were carried out. The equivalent elastic modulus and damping parameters of PCB can be gained, and the fixed boundary condition of finite element model was also determined. These will help to the following work.Second, drop impact tests of three different heights were carried out. Strains and acceleration responses of PCB were measured. Failed BGA packages of different test conditions were dyeing, and cross section analysis of failed solder joints was conducted.

针对JEDEC标准试件的局限性，提出了设计便于统计学研究焊点可靠性的试验试件的构想，利用有限元模态分析方法确定并验证了用圆形PCB组件替代JEDEC标准试件的可行性；通过一系列模态试验和有限元模态分析，确定了圆形PCB组件的相关试验参数，这不仅为跌落碰撞下PCB组件有限元模拟确定了较为合理准确的有限元模型，而且为正确地评价跌落碰撞下PCB组件的可靠性问题奠定了基础。2。

The modal tests of PCB and PCB assembly (free boundary condition and fixed boundary condition) were carried out. The equivalent elastic modulus and damping parameters of PCB can be gained, and the fixed boundary condition of finite element model was also determined. These will help to the following work. Second, drop impact tests of three different heights were carried out. Strains and acceleration responses of PCB were measured. Failed BGA packages of different test conditions were dyeing, and cross section analysis of failed solder joints was conducted. It was found in our drop tests that the root cause of lead-free solder joints under drop impact was the combined effect of mechanical shock and PCB bending vibration.

针对JEDEC标准试件的局限性，提出了设计便于统计学研究焊点可靠性的试验试件的构想，利用有限元模态分析方法确定并验证了用圆形PCB组件替代JEDEC标准试件的可行性；通过一系列模态试验和有限元模态分析，确定了圆形PCB组件的相关试验参数，这不仅为跌落碰撞下PCB组件有限元模拟确定了较为合理准确的有限元模型，而且为正确地评价跌落碰撞下PCB组件的可靠性问题奠定了基础。

Stainless steel table and stool (which can take-off and landing), experimental workbench, stainless steel console, stainless steel recording units, interlocking umbrellas frame (12, 18, 24), stainless steel step by step, stainless steel mop frame, circular outdoor dustbin, barrel racks, and racks, five flower grid shelves, stainless steel carts (the second floor; three), stainless steel floor drain, stainless steel flow plate, stainless steel powder are summarized, stainless steel ladle, stainless steel buckets, volume stainless steel barrels, stainless steel barrels, stainless steel bucket trucks, stainless steel sieve sampling tube, stainless steel oil pump, stainless steel frame name, stainless steel isolation frame, such as stainless steel spatula.

不锈钢桌子，凳子、实验工作台、不锈钢操作台、不锈钢记录台、带锁雨具架（12头，18头，24头）、不锈钢步步高、不锈钢拖把架、户外圆形垃圾桶、桶架、地架、五层花格货架、不锈钢推车、不锈钢地漏、不锈钢周转盘、不锈钢粉撮、不锈钢舀子、不锈钢水桶、不锈钢容积桶、不锈钢桶、不锈钢桶车、不锈钢筛取样管、不锈钢油抽、不锈钢品名架、不锈钢隔离架、不锈钢铲等。

Leaf blade oblong to rotund, apex rounded, mucronate; calyx lobes ovate; stipes of nutlets distinctly curved, short

叶片长圆形到圆形，先端圆形，短尖；萼裂片卵形；小坚果的柄清楚地弄弯，短 27 Trigonotis petiolaris 祁连山附地菜

The specimen horizontally into two of the instrument, sample between the edge of the circular underpan between the minimum distance of not less than 50-mm, measurement should be gently 2 ~ 3 mm/min will activities on blank sample in order to avoid any impact, and make sure the piece and thickness measurement plane parallel.

将试样水平地放入仪器的两个平面之间，试样的边缘与圆形底盘边缘之间的最小距离不小于50mm，测量时应轻轻地以2～3mm/min的速度将活动平面压在试样上，以避免产生任何冲击作用，并保证试片与厚度仪测量平面的平行。

The results showed that, after induced for 4~5 d by dexamethasone, beta-glycerophosphate and ascorbate-2 phosphate, the volume of some cells of the goat MSCs gradually largened and changed their form from spindle/polygon to cuboid/ovoid; With the induce time continuing, the numbers of the cuboid/ovoid cells continuous increased; At 15th day, there were many cuboid cells, and the modality of the cells changed from cuboid to ovoid; At 25th day, the oval and cuboid cells accumulation were observed.

结果表明，山羊MSCs在地塞米松、β-磷酸甘油和抗坏血酸的作用下，从诱导的第4~5天开始，即可见有些MSCs体积逐渐增大，由梭形或多角形转变为立方形或卵圆形；随着诱导时间延长，立方形或卵圆形细胞不断增多，到第15天时，有较多的立方形细胞，且这种变化经历了从立方形向卵圆形转变的过程；第25天，可见卵圆形和方形细胞堆积，诱导分化率为90.2%± 2.97%。

Female inflorescence oblong-cylindric, oblong, or subglobose; lateral lobes of bracts distinct; wings of nutlet included; leaves irregularly or regularly doubly serrate.

圆筒状雌花序长圆形，长圆形，或近球形；苞片的侧面裂片离生；小坚果的翅包括；不规则的叶或规则地重锯齿。

Of 12 tomato lines, the analysis on the 4 fruit nourishment quality traits (the contents of vitamin C, total soluble solids and dry matter and ratio of sugar-acid ) was carried out to study the four kinds of disparities, which included the interspecific one, the one between two varieties in the same species , the one between the lines bred by different means in the same variety ,and the one between the different fruit-shaped lines in the same variety .The analytic method of orthogonal comparison of single degree of freedom was applied. The results showed that the line of Lycopersicum pimpinellifolium was better than the average of the lines of L.esculentum in the 4 traits at significant level of 1%, the average of the lines of var.cerasiforme was better than the average of the lines of var.vulgare in the 4 traits at significant level of 5% or 1%,and the two space mutation line(YH02-2 or YH02-6) was better than the average of the other lines of the same variation in the 4 trait, respectively, at significant level of 1%. Of the lines of var.cerasiforme , the lines with pear fruit were lower than the average of the lines with round-shaped or plum-shaped fruits in the 2traits(the contents of vitamin C and total soluble solids), at significant level of 1%,the lines with plum-shaped fruits were higher than the average of the lines with round-shaped fruits, at significant level of 1%,and the lines with yellow-colored fruits(YH02-11) was lower than the average of the lines with red-colored fruits(YH02-1and YH02-7) in the trait of the contents of vitamin C.

对12个品系进行种间、种内变种间、变种内不同选育方式间、变种内不同果实形状间在果实营养品质（果实维生素C含量、可溶性固形物含量、干物质含量和糖酸比）上的差异进行分析，采用统计学上单一自由度正交比较分析法与植物学分类相结合的方法进行分析，结果表明：醋栗番茄种品系YH02-12在4个营养品质性状上，极显著高于普通番茄种品系；樱桃番茄变种品系在4个营养品质性状上的平均水平极显著或显著高于普通番茄变种品系的平均水平；2个空间诱变品系YH02-2、YH02-6在4个营养品质性状上均极显著高于同变种的其他品系的平均水平；樱桃番茄变种品系中，梨形果品系YH02-5、YH02-8的果实维生素C、可溶性固形物含量均极显著地低于樱桃番茄变种中圆形或李形品系的平均水平，李形果品系YH02-9在4个营养品质性状上均极显著地高于圆形果品系的平均水平，黄色圆形果品系YH02-11的果实维生素C偏低于红色圆形果品系YH02-1和YH02-7。

Then the flow regime in the wells is studied.Firstly, the energy dissipation engineerings are systematically concluded. Then circular stilling well hydraulic model is made.The paper presents guidelines to aid the designers in determining optimum well geometry for their specific needs. General design criteria have been established to determine well size based on design discharge, Q, and diameter of the standard sleeve valve, D.

本文首先较系统地总结了消能工的研究现状；设计制作圆形深筒式消力井水工模型，通过试验及数据分析建立了圆形深筒式消力井各变量间的函数关系式，得出圆形深筒式消力井水力设计的基本方法，即已知设计流量和进水管直径，由曲线可得到圆形深筒式消力井的最优尺寸，并运用工程算例进行验证。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。