查询词典 X

Electroless Ni-Co-Fe-P alloys were deposited from a soft alkaline bath, containing boric acid as a buffer agent and sodium citrate as a complexing agent. The effect of the bath pH value on the coating structure was investigated by energy-dispersive X-ray spectral analysis, scanning electron microscope and X-ray diffractrometry.

摘 要：采用H3BO3为缓冲剂、柠檬酸钠为络合剂，在弱碱性体系中化学沉积Ni-Co-Fe-P合金，运用能谱分析仪、扫描电镜和X射线衍射仪研究镀液pH值对合金结构的影响。

Hemophilia B is an X-linked bleeding disease, caused by the mutations of human coagulation factor IX gene located in chromosome X. It results in a dramatic decline of hFIX quantity or clotting activity in plasma, and the intrinsic clotting pathway is affected seriously.

血友病B是一种性连锁隐性遗传病，其发病机制是位于X染色体上的人凝血因子IX基因发生了突变，导致血浆中hFIX含量或活性大幅下降，从而使得内源性凝血途径受到阻碍，无法进行正常的凝血。

As one of the key devices for circuit board testing and chip packaging detection, its resolution performance has become a bottleneck for the development of X-ray detection system.

提出一种新型高分辨率X射线像增强器，它是线路板检测和芯片封装检测装置中的核心器件之一，其极限分辨率制约着X射线检测装置的发展。

The surface morphology and microstructure were observed by scanning electron microscope, X-ray diffraction and energy dispersive X-ray spectroscope, the surface resistivity was analyzed by avometer and SDHC digital.

用扫描电镜、X射线衍射、能谱等手段对镀层表面形貌、微观结构进行检测，并且使用万用电表和SDHC型数字点式测量仪对表面电阻率进行分析测量。

Modeling and stability analysis problem of linear switched system are emphasized in this part and main results include:(1) Through investigation in the projection of 〓 on x, where x denotes continuous state vector, a series of sufficient conditions for stability, asymptotic stability and unstability of linear switched system's equilibrium in the sense of Lyapunov are achieved. And also, a sufficient and necessary condition for state bounded stability of linear switched system is received.(2) For a class of periodical linear switched system whose switching sets are a group of ordinal lines starting from the original point, it's proved that state bounded stability can be defined by the running characteristic in a single period (3) Based on linear switched system, the concept of linear switched system network is put forward. Linear switched system network is a complex network interconnected by many linear switched systems.

这部分着重研究线性切换系统的建模与稳定性分析问题，主要成果包括：（1）通过考察〓在x上的投影，得到线性切换系统的平衡点在Lyapunov意义下稳定、渐近稳定及不稳定的一系列充分条件，并得到了线性切换系统状态有界稳定的一个充要条件；（2）证明了对于一类切换集为从原点出发的一组射线的周期线性切换系统，其状态有界稳定可根据一个周期内的系统运行特性来判定；（3）在线性切换系统的基础上提出了线性切换系统网络的概念，线性切换系统网络是由多个线性切换系统交互作用而形成的复杂网络。

Relative stability of C2-C52X2 (X = H, F, and Cl) isomers is determined by both attaching sites and properties of addends. The C2-C52X2 (X = H, F, and Cl) complexes are potential targets in experiments.

加成产物的热力学稳定性由加成基团的种类和加成位置共同决定。C2-C52X2 (X = H， F， Cl)是潜在的实验合成目标。4。

Then, we prepare His-Pxa2pC2-HA by the same way, but dialyse with Triton-X 100 to increase its solubility and skip nicole's column purification step. We analysed the molecular size of this His-Pxa2pC2-HA protein by FPLC.

接著，以同样的方式表现His-Pxa2pC2-HA蛋白，并在透析时加入Triton-X 100，再以胶体过滤层析法分析，发现Triton-X 100会干扰胶体过滤层析法的分析。

The product was characterized by Fourier transform infrared spectroscopy, X-ray diffraction, and transmission electron microscopy. Silver crystals were monocrystalline with face-centered cubic structures, which was confirmed by electron diffraction and XRD.

利用透射电子显微镜、X射线衍射和傅里叶变换红外光谱对复合纳米微粒的形貌及其成分进行了表征。X射线衍射和电子衍射证明银纳米微粒具有良好的面心立方体单晶结构。

The results showed that the hollow nanospheres were 65 nm in sizes, which was smaller than that of the original CeO2 nanospheres. The Ce(subscript 1-x)TiO2 hollow nanospheres were face-centered cubic structure as the same as CeO2 nanospheres.

结果表明，Ce(下标 1-x)TiO2纳米空心球的粒径为65 nm，小于初始状态的CeO2纳米球，并且Ce(下标 1-x)TiO2纳米空心球的结构与前驱体CeO2晶体结构相同，均为面心立方结构。

The soliton hierarchies associated with the modified second order polynomialeigenvalue problems can be factorized into the commuting x- and 〓-constrainedflows, the r-matrices and classical Poisson structures for the x- and 〓-constrained flows are constructed.

与修正的二阶多项式特征值问题相联系的孤立子方程族可以被分解为相互交换的x-和〓-约束系统，本文求出了约束系统的r-矩阵和经典Poisson结构。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。