| 1. | The estimation of resistance for acvand ses over the calm water
气垫船静水阻力估算方法 |
| 2. | Method of assessing the hull resistance in still water for high speed craft
滑行艇静水阻力估算方法 |
| 3. | Water resistance is a major factor affecting the law of motion of the automatic mechanisms in underwater firearms
摘要水阻力是影响水下枪械自动机运动规律的主要因素。 |
| 4. | B , positive start has little water resistance and start - up pressure and the flow can be adjusted naturally according to hydraulic prssure
B正向开启水阻力小，启动压力小，且流量根据水压自然调节 |
| 5. | The total kinetic resistance of a moving part ( a firearm bolt ) was acquired by experiment because water resistance was difficult to be got accurately
因水阻力较难准确求得，可利用实验确定活动件（枪机）运动总阻力。 |
| 6. | As with conventional ships , the methods of model experiment , theoretical analysis and numerical calculation are applied to predict the resistance of swath
和常规船型一样，预报swath船型的静水阻力可采用船模试验、理论和数值计算方法。 |
| 7. | The test proves that the roughness - coefficient value reduced to 0 . 009 from original 0 . 014 by reducing resistance , increase 15 % total amount of transporting water
摘要重点研究南水北调中线工程表面减阻降糙技术措施，以降低长距离输水阻力，提高输水量。 |
| 8. | Experimental data from the towing tank tests show that the hydrofoils give more water - drags on the raft ' s hull , and that the hydrodynamic performance of a ferrying raft will be improved by rational designs of the hydrofoils ' profile , angles of attack as well as the position of hydrofoil on the hull
船模水池中的模型拖曳试验表明，尽管水翼会增加门桥的水阻力，但只要合理地设计水翼的翼型、攻角和安装位置，可以改善和提高门桥水动力性能。 |
| 9. | One of the key techniques in swath design is the prediction and optimum design of the hydrodynamic performances ( resistance and propulsion , seakeeping , maneuverability ) , whereas the resistance prediction is the most important task of hydrodynamic performance prediction
小水线面双体船( smallwaterplaneareatwinhull ， swath )船型设计的关键技术之一是其水动力性能(快速性、耐波性和操纵性)的预报和优化设计，而其静水阻力预报是其快速性预报的重要内容。 |
| 10. | The method is described as follows : the velocity of the moving part and the gas chamber pressure were measured with a dynamic test measurement system ; a dynamic model was built on force analysis of the moving part ; the total kinetic resistance replaced the horizontal friction and water resistance ; then the resistance - velocity relation curves at moving stages were obtained ; with the empirical formula of the gas chamber pressure and the resistance - velocity relation curves , the preliminary dynamic characteristics were analyzed and the structural form and key parameters of an underwater assault rifle were determined
具体方法为：由动力学测量系统测得活动件速度和气室压力；分析活动件的受力，建立动力学模型；以运动总阻力代替水平方向上的摩擦阻力和水阻力，获得各运动阶段的阻力速度关系曲线；利用气室压力经验公式和阻力速度关系曲线，对水下突击步枪进行初步的动力学分析，确定其构造型式及主要参数。 |
