collision frequency 中文意思是什麼
collision frequency
解釋
碰撞頻率-
By making some assumptions, collision frequency were presented. then the the flocculation kinetics model was established through population balance equation. comparison of experimental data and modeling results indicate that there are the same trend between the two. so the model can predict floes number and size during flocculation of yellow river ' s loess particles without using empirical parameters. the tem and sem were used to obsever floes in the study of floe structure. the flocculation was divided as flocculi, floc and floe aggregate. the floes structure model was established by assumption that particles position in floe accords with tetrahedron. the fractal dimension of model and experimental floes was found to be coincidentso the model can reflect the structure of flocs formed in flocculation of yellow river ' s loess particles by macromolecule flocculant at a certain extent
最後，本文還對絮凝動力學和絮體結構進行了研究，在前人研究的基礎上，針對高分子絮凝黃河泥沙，對絮凝過程作了一些符合試驗條件的假設，建立了顆粒碰撞頻率表達式，應用了顆粒數量平衡方程，從而建立了絮凝過程的動力學生長模型，模型計算結果與試驗數據對比表明，二者趨勢一致，在沒有使用經驗參數的情況下基本上能夠描述黃河泥沙絮凝過程中絮體數量和尺寸分佈的變化過程；對絮體結構的研究中，應用掃描電子顯微鏡和透射電子顯微鏡對絮體進行了觀察，將絮體分為絮粒、絮團和絮網三個不同的生長階段，通過假設顆粒結合位置符西安建築科技大學博士學位論文合正四面體，建立了絮體結構模型，計算得到的模型絮體分形維數基本與試驗中的實際絮體相符，在一定程度上能夠反映高分子絮凝黃河泥沙生成的絮體結構。 -
Mean collision frequency
平均碰撞頻率 -
The relation between collisional absorption of the em - wave and the plasma density, plasma collision frequency, and incident wave frequency is obtained
給出了不均勻非磁化等離子體密度、等離子體碰撞頻率、電磁波頻率與碰撞吸收的關系。 -
Against the frequency of rear - end collision in the freeway, a suit of rear - end collision warning system to be fit for the situation of our country is studied in order to strive for more time for drivers, and reduce rear - end collision
本文針對我國高速公路追尾碰撞事故頻繁發生的現狀，設計了適合我國國情的汽車追尾碰撞預防報警系統，其主要目的是為駕駛員爭取更多的反應時間，從而減少追尾碰撞事故的發生。 -
To assure that the hybrid ds - fh spread - spectrum communication mode has better capability of information safety and inference suppression, i bring forward a design scheme of ds - fh spread - spectrum communication system and solving effectively the crucial problem such as how to choose the user address, how to choose the hopping frequency and how to avoid the collision of the frequency which is used by different users at the same time
為保證系統可靠、有效地工作，本文提出了一種ds - fh混合擴頻系統的設計方案，並且有效地解決了系統的用戶選址、頻率選擇和頻率碰撞等關鍵問題。通過系統設計模擬證實了ds - fh混合擴頻系統具有優于ds系統的抗干擾性能，並在一定程度上提高了系統的抗遠近效應能力。 -
The first channel of the anti - collision radar system is a typical c frequency band wireless communication transmitting and receiving channel. it can be applied to the considerable communication and measurement & control system
本雷達系統的甲機通道是一個典型的c頻段無線通信系統收發通道，配合適當的終端設備，可用於容量相當的通信系統及測控系統。 -
Consumers successively plunged a large number of silicon controlled commuted devices ( such as steel rolling 、 electrized locomotive 、 aluminium electrolysed devices etc ) and smelting devices to improve their produced efficiency or to save energy. on the one hand it is good for consumers, on the other hand it will arouse the fluctuation of voltage and frequency and it will result in the collision of the active and reactance capacity. meanwhile these nonlinear loads bring much harmonic into the electric network which deteriorate the quality of power supply and hazard the online device enormously
用電部門為了提高生產效益、節約能源，在大電網中相繼出現了大量的可控硅整流裝置（如軋鋼、電氣化機車、鋁加工電解設備等）以及冶煉設備，這些設備的投入使用對節能有一定好處，但給電網造成有、無功沖擊，引起電壓和頻率的波動，同時，這些非線性負荷向電網注入大量諧波，大大惡化了供電系統的電能質量，給用電設備帶來了極大的危害。 -
New interference methods, such as sweeping frequency interference and faster - hop - collision interference, become a new focus of electronic countermeasures to fh communication systems
摘要掃頻式干擾、更高跳速碰撞干擾等新的干擾方法成為跳頻通信系統電子對抗領域中又一重要研究方向。 -
In this thesis, an ultrasonic anti - collision system can be used in garage or when airplanes moving on ground is introduced, which is based on radio frequency ( rf ) technology. the system also has short distance wireless communication function
本文提出了一種基於射頻（ rf ）技術、具有短距離無線通信功能、應用於機庫內或飛機作地面移動時的超聲波防撞系統。
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