查询词典 differential cross-section

Ningbouniversal joints are universal joints specializing in the production of automobiles, engineering machinery universal joint, cross axle differential enterprises, located in Yuyao City, Zhejiang Province Economic Development Zone, adjacent to Hangzhou-Ningbo Expressway and strategic location, the transportation is convenient.

宁波正虹万向节有限公司是专业生产汽车万向节、工程机械万向节、差速器十字轴的企业，坐落于浙江省余姚市经济开发区，毗邻杭甬高速公路，地理位置优越，交通便捷。

In first, a new short time formula of one dimension heat conduction differential equation, based on the theory of one dimension transient method, is presented for thermophysical property measurement of wood. The result of testing on red pine and larch wood arc satisfied by new method.In succession, the relationship between heat conductivity of wood and moisture, density, porosity, temperature and grain is studied experimentally in the range from 25 to 100℃. The result shows that, the heat conductivity is in direct proportion to density. but in inverse proportion to porosity. The heat conductivity of air-dried wood increased probably linear with the temperature rising. And that heat conductivity along the grain of wood is higher than that cross the grain. The former is 1.8 or 2 times of the latter.

文中研究了25～100℃范围内，气干木材的导热系数与含水率、密度、孔隙率、温度及热流方向的关系，研究表明：木材导热系数与密度成正比关系，与孔隙率成反比关系：对于针叶材，导热系数与密度及孔隙率成线性变化关系，而对于阔叶材其变化关系近似成二次曲线；气干木材的导热系数随着温度的升高近似呈线性增加：热流平行于纹理方向的导热系数大于垂直于纹理方向的导热系数，两者的比值大约在1.8～2之间。

College of Animal Science and Technology, China Agricultural University, Beijing 100094, ChinaAbstract: mRNA differential display was used to analyze the difference of gene expression between cross combinations, EC and CE, and their parental inbreds, White Leghorn and Silkies of eight weeks old.

利用 mRNA 差异显示技术，对白洛克肉鸡、中国丝羽乌骨鸡及其正反交组合 8 周龄肝脏组织的基因表达进行了分析。

Among the technical highlights is the new all-wheel drive system (Saab XWD - 'cross wheel drive' ), a fully automatic, on-demand system that usese uses an electronically-controlled rear limited-slip differential, which is capable of sending up to 100 per cent of engine torque to the front or rear wheels whenever necessary.

其中的技术要点是新的全轮驱动系统(绅宝xwd '交叉轮驱动')，全自动，点播系统，usese采用了电子控制的后排有限滑差速器，其中，可将高达100%的发动机转速向前方或后方车轮每当必要的。

By using gene-family-specific primers, we found MADS-box, Ser/Thr protein kinase showed significantly differential expression patterns between reciprocal cross-fertilized kernels and their parents, indicating that MADS-box and ser/thr protein kinase may also play important roles in wheat heterosis.

利用家族特异性引物的展示结果表明，MADS-box家族基因在小麦杂交当代种子与亲本之间存在明显的基因表达差异，且强优势的杂交组合与弱优势组合之间表现差异的cDNA比例差异显著；Ser/Thr蛋白激酶的差异相对较小，表明MADS-box和Ser/Thr蛋白激酶与小麦杂种优势形成有重要关系。

During the study, an unreported Pd-catalyzed cross coupling substitution reaction was observed, and the relative theoretic discussion was made. The mesmorphic properties of all these compounds were observed and measured by polarizing optical microscopy and differential scanning calorimeters.

论文通过钯催化偶联反应合成了十一个系列74个全新的环己基炔类液晶化合物，利用元素分析、气相色谱、液相色谱等方法分析了化合物的纯度，利用红外光谱、核磁共振和质谱等分析手段对化合物的结构进行了鉴定。

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。