Here, when it makes this rounding curve the velocity is positive here, but on this side it's negative so what does that mean for the acceleration? 这里,就在曲线的拐角,速度一开始是正的,不过在另一边就成了负的,就加速度而言这又意味着什么呢?
In the course of time positive and negative acceleration impulses tend to cancel one another. 在长时间中,正向和反向加速度冲击有互相抵消的趋势。
Effect of Positive acceleration on plasma and thalamus endothelin content in rats +Gz对大鼠血浆和丘脑内皮素含量的影响
Stocks in the region hit fresh 11-month peaks yesterday as positive factory data coming out of China and higher commodity prices combined to boost optimism over an acceleration in economic activity. 亚太地区股市昨天升至11个月新高,中国乐观的制造业数据以及大宗商品价格走高,推动了市场对经济活动加速的乐观情绪。
Then it investigates the different effect of acceleration positive and negative feedback on these disadvantageous factors, and presents a method of integration acceleration feedback to improve the control performance of robot position. 然后针对这些不利因素分析了加速度正反馈和负反馈对它们的不同作用,提出了一种用综合加速度反馈来提高机器人位置控制性能的控制方法。
Directed against the designed parallel welding head mechanism of IC chip pasting machine, the movement equation was established, the positive solution of motion equation was presented, and the positive and reverse solutions of velocity and acceleration were derived. 针对所设计的IC芯片粘片机的并联焊头机构,建立了运动方程,给出了运动方程的正解,推导出速度、加速度的正、逆解。
Especially, when main rainfall appears to the right of the centers ( viewing in the direction of motion) 81.8% of the landfall TCs have a positive 12-hour average acceleration; 当主要降水落区位于热带气旋前进方向右侧时,热带气旋的12小时平均加速度为正的占了大部分(81.8%);
Cardiac arrhythmias in pilots under positive (+ Gz) acceleration 飞行员离心机加速度作用下的心律失常
Based on the analysis on the valve gear kinematic curves of a certain chrysler engine, it is found that there is a discontinuity in the positive acceleration portion, then a N th harmonic valve lift curve meeting the constraint conditions has been designed by optimization. 针对美国Chrysler发动机气门运动曲线在最大正加速度段有突变这一问题,进行了分析。采用优化设计法设计了一条满足约束条件的N次谐波气门运动曲线。
And this is a positive feedback acceleration process till the stress destroy wave is formed, and results in the quick failure of the coal seem and the coal and gas outburst. 这是一个正反馈的加速过程,最后水平载荷形成应力破坏波,造成煤体的快速拉裂破坏,形成煤与瓦斯突出。
BACKGROUND: Brain injury can be induced by repeated high positive acceleration(? Gz) exposure, but the mechanism was still unclear. 背景:反复高正加速度(+Gz)暴露可引起脑损伤,但其病理机制尚不清楚。
Positive acceleration brought about a greater of serum cholesterol in rabbits fed with cholesterol than in control group ( P < 0.01). 正加速度能使喂饲胆固醇家兔的血清总胆固醇含量升高得更多(P<0.01)。
The Separation of Genes from Rats Related to High Tolerance to Positive Acceleration 大鼠正加速度高耐力相关基因的分离
Effects of positive acceleration on formation of experimental atherosclerosis in rabbits 正加速度对家兔实验性动脉粥样硬化形成的影响
The short-term precursory anomaly is the "positive acceleration" phenomenon of water level. 它的短期震兆异常是水位变化的正向加速现象。
Effects of Positive Acceleration on the Microcirculation of Rabbit Conjunctiva, Mesentery, Skin and Pia Mater 正加速度(+Gz)对兔眼球结膜、肠系膜、皮肤与软脑膜微循环影响及其意义
Most of the researches on physical dust formation centralized in the rainfall and flowing water's action before, and ignored the positive formation and acceleration action of wind power on it especially in the flown sand region. 对土壤物理结皮形成的研究,大都集中在降雨和流水对物理结皮形成的作用,而忽视了风力尤其是在流沙区风力及其大气降尘对结皮的形成和促进作用。
Conclusion The linear acceleration physical training methods used in this experiment have positive effects, while the methods of angular acceleration training need further investigation. 结论本实验所设计的直线加速度刺激体训方法取得了一定效果,角加速度训练的方法和刺激强度有待进一步研究。
Variation of NO, NOS level of brain tissue and plasma ET in rats induced by positive and negative acceleration 正、负加速度交替急性大鼠脑组织NO、NOS及血浆ET的含量变化
The perturbation pressure force is negative in the middle-upper parts of cloud, which suprces the growth of cloud, and is positive in the lower part which promotes the cloud upward acceleration. 扰动气压梯度力在云的中上部为负力,它抑制了云的生长发展;在云的下部为正力,它使云向上的加速度增大。
Because of their special working environment, pilots have been inevitably exposed to various stressors among which positive acceleration (+ Gz), noise, vibration and high temperature are always present and remain important factors threatening flying safety. 由于军事飞行特殊的工作环境,战斗机飞行员不可避免地暴露于各种应激源,其中最常见的主要有正加速度(+Gz)、噪声、振动和高温等,已成为威胁飞行安全的重要因素。
Aim: To observe the change of cardiovascular endothelium's ultrastructure and its intercelluar adhesion molecules 1 ( ICAM 1) expression in rat after repetitive high positive acceleration (+ Gz) exposures and further to explore the mechanisms of myocardial injuries induced by high+ Gz stress. 目的:观察重复正加速度(+Gz)暴露对大鼠心肌血管内皮细胞超微结构的影响及其暴露后细胞间粘附分子1(ICAM1)表达的变化情况,进一步探讨高+Gz暴露致心肌损伤的机理。
The motion sickness group rats were established by rotatory stimulation with alternative positive and negative acceleration 2 h/ d for 4 days. MSG大鼠给予正负交变加速度旋转刺激2h/d,连续4d后与NCG大鼠一起处死;
Based on the vehicle movement dynamics, the motions with positive or negative acceleration are taken into account to deduce the equation of lateral change of the carbody acceleration. 基于行驶动力学理论,推导出考虑列车加减速行驶的车体横向加速度时变率的一般计算公式。
The study also helps to find out: 1. The community martial arts 'development has the positive promotion effect, in rich community sports content, prosperous community culture, promotion martial arts aspects and so on movement popularization, acceleration harmonious community construction. 2. 研究结果表明:1.社区武术的发展,对于丰富社区体育内容,繁荣社区文化、促进武术运动的普及、加速和谐社区建设具有积极的推动作用。
The sustained positive acceleration (+ Gz) has a stronger gravitational effect on pilots along the Z-axis of their bodies in the direction of head-to-foot, and induces shift of blood from head and thorax to lower body parts. 持续性正加速度(+Gz)则对飞行员引起更加强烈的沿身体纵轴的重力作用,使血液向下身转移。
The positive aspects are mainly the assurance of the territory safety of Qin state, the promotion of ethnic fusion, the acceleration of the economic and cultural development in northern China, and the passive one is mainly the deterioration of ecological environment. 积极作用主要是保障了秦国疆域的安全、促进了民族融合、加快了西北地区经济、文化的发展;消极作用主要是造成了生态环境的恶化。
Overall, the Shanxi pasta culture makes a positive contribution to the culture history of Chinese food, to promote the acceleration of the food culture and the establishment of the Chinese food cultural circle. Its historical and cultural heritage values should be cherished. 总的来看,山西面食文化为丰富中国饮食文化史、推动饮食文明的进步,促进中国饮食文化圈的形成做出积极的贡献,其历史文化遗产价值值得珍视。