查询词典 precipitation

After quenching, the phases of the composite are as same as the as-cast composite, but the morphography of TiC particulate was transformed from square to sphere, some TiC particulates coarsen due to the precipitation of the solid-soluble TiC particulates; the other TiC particulates change into the smaller spherical particulates due to the solution of the sharpangled portion of the quadrate TiC particulates.

热处理后，复合材料的相组成不变，但是TiC颗粒由方形变成球形，固溶析出的TiC颗粒在某些TiC颗粒的表面沉积，使后者粗化；另一些方形颗粒的尖角处溶解形成直径更小的球形TiC颗粒。

But in cast multicrystalline silicon, the copper-precipitation temperature was about 700℃, much lower than that in as-grown Cz silicon.

在原生的直拉单晶硅中，铜沉淀的温度为800℃，这与由前人的理论所推导出的结果一致。

However, iron precipitate could hardly be found by scanning infrared microscopy in the specimen annealed lower than 1100℃ so that iron-precipitation temperature in monocrystalline silicon or cast multicrystalline silicon could not be determined.

然而，用红外扫描电镜等很难观察到热处理温度低于1100℃处理过的样品中是否存在铁沉淀，所以无论是对于直拉单晶硅还是对于铸造多晶硅，很难确定铁的沉淀温度。

The nonconvective precipitation are predicted by using the Reisner scheme .

对于可分辨尺度的降水，采用Reisner霰显式方案

The magnetite with a mean diameter of 8nm was prepared by chemical coprecipitation methods. By the addition of nonionized oleic acid to the suspension of magnetite in solution during precipitation, the magnetite nanoparticles were coated with a double surfactant layer. A gel-like precipitated precursor is then formed because of the hydrophobic interaction among those coated units. By transferring of this precursor to an organic solvent, the surfactant double layer on Fe〓O〓 nanoparticles reduces to one; however, it still remains as a double layer by transferring to an alkaline aqueous solution. Both these cases give in stable colloids of superparamagnetic Fe〓O〓 nanoparticles.

从解决无机磁性Fe〓O〓颗粒与有机烯类单体的相容性入手，采用化学共沉淀法，制备了平均直径为8nm的超顺磁性Fe〓O〓颗粒，在制备过程中以非离子形式引入油酸，在Fe〓O〓颗粒表面形成一个具有双层结构的疏水外壳，并通过疏水相互作用凝聚成磁性Fe〓O〓凝胶，能够以单分子层结构形式溶解在非极性溶剂中，也能够以双分子层结构形式溶解在碱性水溶液中，形成稳定的超顺磁性Fe〓O〓溶胶。

TiB〓 originates from the reactions among the nonsolid intermediates during the combustion synthesis of Al〓O〓-TiB〓, and its fomation just characterizes dissolution-precipitation mechanism.

TiB〓产生于非固相中间产物之间的反应，具有单一的溶解-析出特征。

Caldiz MS, Brunet J (2006) Litterfall of epiphytic macrolichens in Nothofagus forests of northern Patagonia, Argentina: relation to stand age and precipitation.

Hauck 等(2001)在德国 Harz 山50株挪威云杉 1.0–2.0 m 树干处仅收集到21种地衣； Gustafsson 和 Eriksson(1995)在瑞典 Uppsala 地区的欧洲山杨 P。

There was conspicuous contradiction appeal between water supply and demand in the Yellow River basin in 1997 because of much less precipitation and runoff than nounal and no-flow in the lower reaches in 1997 was the most serious in the records.

1997年，由于黄河流域降雨、径流量较常年明显偏少，水资源供需矛盾十分突出，黄河下游出现了有资料记录以来断流最为严重的一年，利津站于2月7日开始断流，截止到12月31日，断流13次，共计226d，与有记录以来的历史资料比较，呈现出断流开始时间最早、恢复过流时间最晚、断流河段最长、断流次数最多、断流时间最长等特点。

The number and size of the oases are closely related to the altitude and quantity in precipitation of the nearby mountains.

它与山的高度和雪源的多寡有极密切的关系。

The variation tendency of river runoff,precipitation and temperature over drainage areas of the major rivers in Qinghai province was analysed by using nearly 38 years observative data.

通过分析近38年青海省主要河流径流量及其流域降水、气温的变化趋势，着重研究了干旱气候对青海地表水资源的影响。

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。