晶

Calcium carbonate whiskers were synthesized by using industrial waste phosphogypsum as raw materials.Calcium carbonate crystal form was characterized by microscope and electron-scanning microscope,XRD and FTIR analysis was employed to investigate the morphology of calcium carbonate whiskers.

论文摘要以废弃磷石膏为原料制备碳酸钙晶须，利用显微镜和扫描电镜观察晶体形貌，晶须样品的晶型用X衍射和红外光谱进行了表征。

The synthetic technologies of calcium carbonate whiskers are reviewed, most of which are carried out in the normal gravity environment by adding some kind of morphology-control additive or needle-like crystal seeds of calcium carbonate supplemented with certain phosphate so as to prompt the crystal of calcium carbonate whiskers to grow in a certain direction to the reaction system.

摘 要：晶须碳酸钙的合成技术备受关注，其中绝大多数方法是在常重力场中，通过向反应物系中添加某种晶形控制剂，或预先添加针状碳酸钙晶种，并辅以能够促使碳酸钙晶体沿单一方向生长的磷酸系助剂。

With the requirement of JiYuan Irish diamond factory, the automatic sorting machine of quartz crystal wafer is studied on by using the international advanced technique of full automatic sorting machine of quartz crystal wafer, which is based on the semi-automatic sorting machine of quartz crystal wafer.

本项目应济源市水晶厂的要求，在原有半自动石英晶片分选机的基础上，借鉴国外全自动石英晶片分选机的先进技术对石英晶片自动分选机进行了研制。

The similarities in crystal structures and lattice constants between theLaNiO3 and BST films offer the benefits of better lattice matching and structural compatibilities,and the potential for improved dielectric and leakage current properties.

研究表明LaNiO_3和BST薄膜在晶格结构和晶格常数上的相似性给BST薄膜和底电极提供了更好的晶格匹配，从而改善BST薄膜的性质。

The tantalum grains have at least a 40 percent (222) direction orientation ratio and less than a 15 percent (110) direction orientation ratio in an atom transport direction away from the sputter face for increasing sputtering uniformity, the tantalum body being free of (200)-(222) direction banding detectable by Electron Back-Scattering Diffraction and wherein the sputter target has a purity of at least 99.99 percent.

所述钽晶粒在远离溅射面的原子输送方向上具有至少为40％的(222)晶向的取向比率和小于15％的(110)晶向的取向比率，用于增强溅射均匀度，所述钽本体没有可采用电子背散射衍射法而检测到的(200)-(222)晶向条带并且其中所述溅射靶的纯度至少达到99.99％。

Characterization of cotton fiber using solid-state ~(13)C-CP/MAS NMR spectroscopy shows that the crystallinity after MHT is lower than the original sample,but the cotton after MHT has a higher lateral orientation index,which has a good definition in C2,3,5 resonance region.~(13)C-CP/MAS NMR spectroscopy and X-ray diffraction reveal that cellulose I_βis the main cellulose in cotton,and microwave change the allomorphs content.

通过核磁共振碳谱表征分析可知，微波处理之后的结晶度要小于原样，但是由于微波处理之后的棉纤维有相当高的侧向有序指数，其在C2，3，5共振区域有更好的清晰度。X衍射和核磁共振均表明棉纤维是以纤维素I_β为主，微波处理改变了纤维素的晶型，晶型含量I_α和I_β均降低，但是比例基本保持不变，微波处理之后向次晶转化。

The results show that the relationship betweentotal potential energy and time step exhibits periodic characteristic when sigma-3symmetric twist grain boundary model and sigma-3 tilt grain boundary model slide atOK. But for sigma-13 asymmetric tilt grain boundary, the relationship between totalpotential energy and time step exhibits damp surge characteristic.

结果发现，∑3对称扭转晶界模型与∑3对称倾侧晶界模型在0K滑动时，系统的势能与计算步数之间的关系曲线呈现周期性变化的规律，而∑13非对称倾侧晶界模型系统的势能与计算步数之间的关系却呈现阻尼振荡特征的变化规律。

The results show that from the interface to surface the microstructure of the cladded coating is composed of plane grains,tiny grains and fine dendritic grains. The two main compositions of Ni and Cr homogeneously distribute in the section.

结果表明，熔覆修复层的显微组织从界面往上依次由平面晶、细晶层和中部细小的树枝晶构成，主要元素Ni和Cr在截面内均匀分布，原有Cr层与熔覆层内的Cr元素呈连续状，构件修复区以外的铬层与基体的结合未受激光熔覆的影响。

Measurement system for crystal fiber loss has been set up, an idea that single mode quartz fiber acts as the coupler of crystal fiber incident light has been put forward. The propagation loss of the cladded crystal fiber is measured using this measurement system to be 14 times as low as that of the uncladded crystal fiber, and the transmission of low order modes has been realized in the cladded crystal fiber.

利用激光加热基座法生长出了不同直径、不同晶向的LiNbO〓和Nd：MgO：LiNbO〓单晶光纤；根据熔区质量守恒和热量守恒方程解析了生长速度、速度比和激光功率对晶纤内部显微缺陷和直径波动的影响，提出通过控制激光功率和速度比来维持熔区形状的稳定，以实现高品质晶纤的稳定生长。

The morphology and structure of the dendrite-like copper crystals with micrometer size and face-centered cubic structure were characterized by using scanning electron microscopy and X-ray diffraction.

用扫描电子显微镜和X射线衍射仪对枝晶铜进行了形貌和物质结构的表征；制得的枝晶铜尺寸达到微米级，为面心立方晶相。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷