查询词典 precipitation

The microstructure evolution and composition distribution of the 7A55 cast and homogenized alloy were studied by optical microscopy, scanning electron microcopy, energy dispersive spectrometer, transmission electron microscopy and X-ray diffractometry. The homogenizing and overburnt temperatures of the alloy were determined. Meanwhile, the diffusion kinetics of the alloy elements during homogenizing treatment was investigated and the homogenizing kinetic equation was deduced according to Fick's First Law of diffusion. The diffusion of alloy elements, precipitation of Al3Zr particles and the conglomeration and globe of the insoluble phases were explained by the equation during homogenization.

摘 要：采用光学显微镜、扫描电镜、能谱分析、透射电镜和X射线衍射分析等研究了7A55合金铸态与均匀化显微组织演化与成分分布，确定了该合金的均匀化处理温度与过烧温度，研究了铸锭均匀化动力学过程，利用菲克定理导出了均匀化动力学方程，利用动力学方程对均匀化过程中合金元素的扩散、 Al3Zr的析出、难熔相的聚集和球化现象进行了解释。

Gold deposit ; telluride minerals ; paragenetic relationship ; precipitation mechanism

金矿；碲化物；共生关系；沉淀机制

The experimental results show that CaO has dual effects on the precipitation and growth of the perovskite phase.

实验结果表明：CaO加入量对钙钛矿结晶及晶体生长有双重影响。

After this, phagocytic cells will form the antigen-antibody reaction or precipitation Group phagocytic cells digest.

在这之后，吞噬细胞就会将抗原抗体反应形成的沉淀或细胞集团吞噬消化。

Phenological phase changes of populus simonii have not obvious response to precipitation and sunshine.

小叶杨物候期的变化对降水和日照的响应不明显。

The precipitation fluctuation influenced the changes of phenological events as well, especially in the arid and semi-arid region. There was a time lag for the response of vegetation activity to climate change, and the duration varied with scale, space and time.

无论是活跃生长开始日期的变化趋势，还是活跃生长结束日期的变化趋势，随着海拔的变化都具有明显的变化规律。

The proportion of GGT complexed with low density lipoproteins plus very-low density lipoproteins in total GGT in serum is determinated with ratio colorimetery,sodium phosphotungstate and MgCl2 as precipitation.26 patients with liver cancer,18 with liver cirrhosis,22 with chronic hepatitis,14 with the other malignant tumors,16 with non-hepatobiliary disease of high GGT and 50 healthy subjects have been evaluated.

本文以磷钨酸－氯化镁作沉淀剂，速率法测定血清低密度脂蛋白，极低密度脂蛋白结合的r－谷氨酰转移酶（LDL－VLDL－GGT）占总GGT的百分比。对临床26例肝癌、18例肝硬化、22例慢性肝炎、14例其他恶性肿瘤、16例GGT升高的非肝脏疾病及50例健康人进行了检测，结果表明：肝癌组明显高于其他各组，差异显著（P＜0.01）。肝脏疾病升高幅度：肝癌＞肝硬化＞慢性肝炎，且每两者间有显著差异（P＜0.01）。

We established the statistical models for this site with the flux components, NDVI and other impact factors (precipitation, photosynthetically active radiation), and we validated the model at the site. The results of validation indicate that the model we established can well simulate the characteristics of flux components.

3利用生长季期间的NDVI时间序列数值，在1：100万中国草地资源数据的基础上进行聚类运算，在典型高寒草甸区域上划分出与海北通量观测塔所在处具有相似NDVI时间动态变化的区域，将此区域作为我们的通量扩展区域。

The application of the extension engineering method in regionalization avoided the shortcomings of single indicator, such as the aridity or precipitation, and conduced to the consummation of the physicogeographical regionalization, the establishment of the eco-geographical regional system of China, and the further research on the transitional areas.

运用可拓工程方法，以综合考虑引起区域自然景观分异、变化的主导因子为出发点，解决了中温带半湿润、半干旱区界线划分问题，弥补了单指标（如仅考虑干燥度或降水量）在区域界线划分中的不足；有助于综合自然地理区划的进一步完善和中国生态地理区域系统的构建；也有益于对生态过渡带的深入研究。

Layered double hydroxides pillaring with organic anion s CoAl-LDH are directly synthesized by a homogeneous precipitation method using the urea as a precipitiant,and the LDH products have been characterized through XRD,FT-IR,TGA and TEM.

以尿素为沉淀剂用均匀沉淀法直接合成有机阴离子柱撑水滑石(LayeredDoubleHydroxides，LDH)及CoAl水滑石等，并用XRD，FT-IR，TGA，TEM等分析手段对所合成的水滑石进行了表征。

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。