| 1. | Influence of sand grain shapes on dry density of sediment
沙粒形状对泥沙干密度影响初探 |
| 2. | The study on evaluating method of grains shape of coarse aggregate
粗骨料颗粒形状评定方法的研究 |
| 3. | Relationship between rice embryo weight and grain shape characters in giant embryo rice
巨胚稻胚重与糙米粒形的关系 |
| 4. | In the paper , the influence of grain shape on the flow characteristic of self - flowing materials is discussed . it is considered that the flow characteristic of self - flowing materials with aggregate containning sheet - shape grains is good
本文用流体力学的观点，论述了颗粒形态对自流料的流动性的影响，认为含有片状颗粒的骨料配成的自流料流动性较好。 |
| 5. | Physical state : this produce is made of natural silica sand by the advanced processes of water scrubbing and reelecetion . natural silica sand has the naturally founded grain shape and uniform particle size and takes on brown - white or off - white color
物理状态：本产品经天然硅砂水洗，重选等工艺加工而成，天然硅砂具有天然的滚圆粒形和均匀的粒度，呈褐白色或灰白色。 |
| 6. | It has a large region of application in solid rocket motor grain design and has made new improvements compared with other available codes . user can easily and rapidly build his initial grain shapes and then obtain geometric information of his design . according to the theory describeds in the paper , the regressions of the burning surface area and the pressure are obtainded
该系统扩展了固体火箭发动机装药的设计能力，用户可利用它简捷地构造出三维药柱的初始形状，并获得设计所需的各个几何参数，进而依据本论文提出的复杂三维药柱内腔燃烧推移和燃面计算的方法，计算出燃面变化和压强变化，得到推力随时间变化的曲线，再依据这些计算结果进行再设计，直至达到满意的结果为止。 |
| 7. | In the present research , scanning electron microscope ( sem ) , laser raman spectroscopy ( lrs ) , x - ray photoelectron spectroscopy ( xrs ) , x - ray diffraction ( xrd ) and electron probe micro analysis ( epma ) were utilized to investigate the difference in micro - structure and elements distribution between domestic and foreign pdcs . combined with analysis on current manufacturing process , the mechanism for the difference was discussed . scanning electron microscope ( sem ) , laser granularity analysis , atom emission spectroscopy ( aes ) and plasma emission spectroscopy ( icpaes ) are also utilized to investigate the grain shape and impurities of key material - diamond power
本课题采用扫描电镜、拉曼光谱、光电子能谱、 x -射线衍射分析、电子探针等方法分析了国内外聚晶金刚石-硬质合金复合片在微观组织结构、元素成分分布方面的差异，结合对现有烧结工艺的分析，研讨了造成这些差异的机理；采用扫描电子显微镜、激光粒度分析、原子发射光谱、等离子发射光谱等方法对关键原材料-金刚石微粉的晶形、杂质含量进行了比较分析测试。 |
| 8. | Abstract : the 15 rice traces in the pottery of dulingao ruin were studied with scanning microscope . the like - indiea in grain shape and like - japonica of bi - peaked tubercle and the few remaining charac - ters of o . rufipogon of chaling area were observed , with the conclusion that they are a type of original cu - tivated minute - grain japonica
文摘:用扫描电镜对独岭坳遗址红烧土中解剖出来的15粒水稻印痕进行观察研究，发现粒形似籼而双峰乳突纵横排列特征近于粳稻，尚留有茶陵野稻的某些特征，认定为属于二向演化的原始小粒栽培粳稻类型。 |
