net velocity 中文意思是什麼
net velocity
解釋
凈速度-
The group velocity ( u ) corresponds to the net result from the addition of all elements with different periods and different velocities within the wave motion
而群速度（ u ）符合於波動的不同周期，不同速度的各種因素疊加的凈結果。 -
The group velocity(u) corresponds to the net result from the addition of all elements with different periods and different velocities within the wave motion.
而群速度（U）符合於波動的不同周期，不同速度的各種因素疊加的凈結果。 -
Conclusions could be drawn out through a positive analysis of some port companies : the factors that have a positive effect on the strategic target are the rate of main business return, the velocity of the assets, while the capital structure and the rate of the increase of the increase of investment have little effect, which illuminate that the port company should focus on the main business to enhance the return of net assets, it also shows that the business of the list port companies is over - concentrated, and should be diversified to lessen the operating risk ; the companies should accelerates the turnover speed of the assets ; the appropriate structure of the assets can bring benefit to a company, but the ultimate approach to enhance the return of the net assets is to look for items with high return ; the sightless investment made the increasing speed of return lag behind the expanding speed of the capital ; and result in no scale economic benefit
本文通過對部分港口類企業進行計量分析后發現港口企業的資本結構和投資對凈資產收益率沒有顯著的影響，而港口企業收入過分集中。針對未來財務環境發生的變化，本文從戰略財務管理的角度對南京港口集團公司提出以下建議：在投資領域，今後應以綜合物流為契機，專業化與多元化並重；適度發展集團化經營；優化資源配置，提高資產營運效率。在融資領域，要合理選擇融資渠道，降低融資成本，更多關注債務融資；確定合理的資本結構，控制負債風險，建立償債保障機制。 -
We derive an analytic expression of the group velocity dispersion ( gvd ) induced chirp and the self - phase modulation ( spm ) induced chirp in the normal dispersionregion of non - kerr - like optical fibers with saturable nonlinarity. the evolution of chirp is simulated by numerical methods. the studied results show that the more powerful saturable effects, the smaller is chirp and the gently is chirp. the net chirp is zero in the central region of the pulse
從理論上推導出具有飽和非線性的非克爾光纖正常色散區內，群速度色散效應導致的啁啾和自相位調制效應導致的啁啾解析表達式.利用數值解法模擬了非克爾光纖正常色散區啁啾演變過程.研究結果表明：當非克爾光纖的飽和非線性增強時，凈啁啾不斷減小，而且，越來越平緩，脈沖中心附近區域凈啁啾接近零 -
Acceleration always has the direction of the net force, regardless of the direction of the velocity.
加速度的方向總是與凈外力的方向一樣，而與速度的方向無關。
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