球粒

Discussed the ratio of alcohol/water for dispersion medium, the polymerization temperature and stirs speed factor and so on to the polymerization system stability, microspheres particle size and its distribution influence.

考察了分散介质的醇水比、聚合温度及搅拌速率等因素对聚合体系的稳定性、微球粒径及其分布的影响。

When Ni concentration is 0.03 mol/L, the uniform flower-like Ni2 microspheres with average diameters of about 2 μm were obtained and composed of nanoflakes with length of about 400 nm and thickness of about 60 nm.

当溶液中Ni浓度为0.03 mol/L时，花状微球粒径分布较均匀，平均粒径约为2 μm，微球由花瓣长度约为400 nm、厚度约为60 nm的纳米片花瓣组成。

The joining material may be a solder paste, the substrate may be a semiconductor chip substrate, a computer chip. The process may be used to produce flip chips, ball grid array modules, column grid array modules, circuit boards, and attachment structures of the preceding components including information handling systems.

连接材料可以是焊剂糊料，基片可以是半导体芯片基片，计算机芯片，本方法可用于制造倒装式芯片、球粒格网阵列式模块、柱形件格网阵列式模块、电路板、以及包括信息管理系统的上述元件的附着结构。

The effect of reaction parameters such as quantity of NaCl, magnesium carbonate and crosslinking reagent, water-to-monomer ratio and polymerization temperature on particle sizes was investigated in detail.

着重研究了反应体系中电解质的用量、聚合反应温度、水油比、碱式碳酸镁及交联剂的用量等反应参数对微球粒径的影响。

The chemical compositions of the melting chondrules are relatively close to the compositions of the type C olivine aggregates.

熔融球粒的化学成份与C类杆拦石集合体的成份相对较为接近。

The phyllite, gold-bearing untramylonite and gold-bearing quartz-vein of PEG geochemistry partition mode are Pt-Pd type.

铂族元素地球化学研究表明，千枚岩、超糜棱岩、含金石英脉铂族元素CI球粒陨石标准化分配模式属于Pt-Pd型。

The gabbro-diorites have high light rare earth elements, low heavy rare earth elements and weakly positive Eu anomalies in chondrite-normalized rare earth element curves, and with high LILEs and relative low HFSEs in primitive mantle-normalized trace element spider diagram.

稀土元素球粒陨石标准化曲线显示其具有富含轻稀土元素、贫重稀土元素以及微弱的Eu的正或负异常的特点。微量元素原始地慢标准化蛛网图上，岩体具富含大离子亲石元素，明显亏损高场强元素（Nb、Ta、Zr、Hf和Ti）等特点。

Study of Iron Cosmic Spherules from 1.8 Ga and 1.6 Ga Proterozoic Strata of the Ming Tombs District, Beijing

北京十三陵中元古代1.8Ga和1.6Ga的铁质宇宙球粒研究，宋天锐；和政军；万渝生；刘燕学-66文免费论文库，大学生论文库

Studies on impact-related minerals, geochemical anomalies, impact microspherules and microtektites enable us to define frequencies, magnitudes and types of impact bodies of extraterrestrial impact events. Impact layers and ejectas may not only provide distinct event markers in high-resolution stratigraphical correlation, but also potential interpretations for the catastrophic changes and their causes of life and global environment.

通过对撞击地层层序的时空变化、所包含的撞击成因矿物、撞击微球粒和微玻璃陨石以及古生物和地球化学异常等的研究，可以了解撞击事件的发生频率、幅度和撞击天体的性质等，也为探索生物和地球环境的灾难性变化及其起因提供了新的思路。

Studies on impactrelated minerals, geochemical anomalies, impact microspherules and microtektites enable us to define frequencies, magnitudes and types of impact bodies of extraterrestrial impact events. Impact layers and ejectas may not only provide distinct event markers in highresolution stratigraphical correlation, but also potential interpretations for the catastrophic changes and their causes of life and global environment.

通过对撞击地层层序的时空变化、所包含的撞击成因矿物、撞击微球粒和微玻璃陨石以及古生物和地球化学异常等的研究，可以了解撞击事件的发生频率、幅度和撞击天体的性质等，也为探索生物和地球环境的灾难性变化及其起因提供了新的思路。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐