| 1. | The law of sand incipience is the connection of microcosmic mechanism research on wind - blown - sand two phase flow and macrocosmic engineering application
沙粒起动规律是联系风沙运动微观机理研究和宏观工程应用的桥梁。 |
| 2. | Whether sand can saltate from sand bed surface and quality of sand incipience are very important to the sand transport and the form of wind - blown - sand
沙粒能否起动以及起动质量如何，如起动初速度、起动角度等参数都直接关系到沙粒的输运和风沙两相流形成。 |
| 3. | Our research analyzes desert phenomena and physiognomy characteristics with gas - solid hydromechanics principles . the typical phenomena include sand incipience , sand ripple and sand erode
使用流体力学的基本原理解释沙漠中的沙粒起动、沙纹形成和沙蚀等常见现象和地貌特征。 |
| 4. | As far from dynasty zhou , the ancients had proposed that family education should " be done properly from the incipience " , namely , the incipient education imposed on children should be done cautiously and consciously
远在周朝，古人就从“正本慎始”这一辩证思想出发，提出家庭教育要“蒙以养正” ，即谨慎地对幼儿进行有意识的早期施教。 |
| 5. | Our research obtains absolute fluent incipience and general incipience information of sand thickness field and velocity field . firstly proposed a conclusion that the ratio of incipient efficiency on fluent and general incipience varies with wind speed
本文分析了纯流体起动和综合起动条件下沙粒的浓度场和速度场信息，发现了两种起动的效能比随风速的变化关系。 |
| 6. | The quality of sand incipience involved with many kinds of parameters , such as incipient velocity , incipient angle etc . our research depends on the advantage of cross - knowledge and makes a research on this subject by gas - solid hydromechanics theory and ptv measure technology
本论文发挥交叉学科的优势，采用气固两相流体力学理论和ptv测量技术研究这一现象，从新的角度认识沙粒起动和风沙流结构，为风沙流动的研究打开了新的思路。 |
| 7. | In the extended experiment we modulate the sand grain diameter and air humidity to contrast with the natural result , discuss the effect of diameter and humidity on sand incipience , propose some ideas and methods to control sand transportation and formulation of wind - blow - sand flow
本文还拓展了实验条件，通过调整沙粒粒径配比和空气湿度，完成了对比性实验，并进一步探讨了粒径和湿度对沙粒起动的影响，提出了在沙漠工程中控制风沙流形成和沙粒输运的思路和方法。 |
| 8. | Our research analyzes comprehensively the sand data , such as thickness distribution , velocity distribution , frequency distribution of sand incipience velocity , expatiates the behaviors of these two sand incipiences in wind - blown - sand flow , then our research amends some deficiency of relative researches
本文全面分析了沙粒浓度分布、速度分布和沙面上起动沙粒速度参数的频率分布等，阐述了两种沙粒起动方式在风沙流中的不同表现，并对相关研究资料中的不足进行修正。 |
