core velocity 中文意思是什麼
core velocity
解釋
了速度-
Stick-slip flow is a jerky movement of compacted grains with velocity of particles at the walls slightly lower than in the rod like core.
粘附滑移流動是一種密集顆粒的急跳式的運動，在壁面處，顆粒的速度稍低於呈桿狀的中心的速度。 -
In this thesis hydraulic experimental studies and theoretical analyses on the vortex - flow drop shaft were conduced and the following results were accomplished : ( 1 ) in the model test some hydraulic characteristics including the shape of air core in the center of the drop shaft, the radial distribution of water flow velocity and the distribution of pressure on the wall of the drop shaft were measured under the condition of high water head above 250m and large discharge above 1400m3 / s. ( 2 ) a kind of computational method for the spiral water flow in the air core region of drop shaft was discussed and applied and the results agree the experimental data well. ( 3 ) the total ratio of energy dissipation in the drop shaft can reach 90 % and the energy dissipation in every region was discussed quantitatively
本文通過試驗研究與理論分析對旋流式豎井泄洪洞應用於高水頭、大泄流量情況時存在的一些水力學問題進行了研究和探討，取得以下主要成果：一、結合小灣工程導流洞改建，對高水頭（ 252m ） 、大泄流量（ 1400m ~ 3 s ）條件下旋流式豎井中的水流運動特徵進行了比較全面的測量，包括空腔形態、徑向流速分佈及井壁壓強等；二、提出了豎井空腔段螺旋水流水力計算方法，其計算結果與實測值吻合良好；三、利用試驗與計算結果，對旋流式豎井的消能機理進行了探討，對豎井各部分的消能能力有了總體認識；四、對豎井下部消力井的合理井深進行了優化試驗研究，發現消力井合理深度為0 . 9d左右；五、通過試驗研究，歸納出豎井水流總摻氣量估算方法，為導流洞排氣方案的設計提供了參考依據；六、在高水頭、大流量條件下，豎井空腔段下部流速很高，盡管水流螺旋運動引起的離心力可以確保井壁壓強保持正壓，但空化數依然較低，因此豎井的空化空蝕始終是工程界關注的重大問題。 -
Intense ultraviolet radiation from the core heats the circumstellar gas to ten thousand degrees, and the velocity of the gas flowing away from the star jumps to about a million miles per hour
核心強烈的紫外輻射將星周氣體加熱到上萬度，從恆星流出的氣體速度躍升到了每小時百萬英里。 -
The analytical result showed that, the width of kuroshio in the middle part became wider from south to north, and the velocity increased, and the depth of the core became shallow
分析結果表明，中段黑潮流幅山南至北增寬，流速變大，流核所達深度變淺。 -
The scouring velocity of the molten steel against roll core is the highest and lower when the pouring angle is 15 and 90, respectively
澆注傾角為15時，鋼液對輥芯的沖刷速度較大，而澆注傾角為90時，鋼液對輥芯的沖刷速度較小。 -
Velocity sensitivity effect under the test of full diameter core
全直徑巖心測試下的速敏效應 -
Relaxation factors are adopted. a program is produced to simulate swirling air flow in a horizontal straight pipe and compare with experiment data. the simulation prove that the modified k - model can predict the core, annular and wall regions near entrance and axial velocity far from entrance, but it ca n ' t predict tangential velocity well in weak swirling area far from entrance
編程計算水平圓管內螺旋氣流的流動參數並與實驗數據對比，結果表明修正-湍流模型在近入口處基本上能預測出中心區、環形區和近壁區的流動特性，在遠離入口弱旋流區域對軸向速度的預測符合實際情況，但是出現對周向速度修正過大的現象。 -
The average slip ratio of droplet velocity to gas velocity across the gas core is about 0. 7 for oil - gas two - phase flow
油氣兩相流動時氣核中液滴與氣相的平均滑移比約為0 . 7 。 -
Through the statistic and analysis of rock core crack, sonic wave velocity test, microcosmic structure of core slice observation by electron microscope, core strength test to the sampled damaged slope rock mass, it indicates that the damage degree of smooth blasting to slope rock mass has no obvious relation with blasting scale but with the line density of explosive filling and the strength of the rock in damaged area decreases evidently
通過受損邊坡巖體取樣巖芯裂隙的統計分析、聲波速度測試、巖芯切片微觀結構的電鏡觀察及巖芯的強度試驗，發現光面爆破對邊坡巖體的損傷程度與爆破規模無明顯關系，而與光爆孔的線裝藥密度有關，損傷區巖石的強度明顯降低。 -
A simple model for primary breakup of energetic liquid jets was established using unstable wave theory. based on the jet - embedding method, the jet - core shape, the distribution of jet velocity and the primary distribution of liquid drops were computed
使用不穩定波理論，建立了射流初始破碎的簡化模型，採用射流嵌入法（ je ）進行了數值計算，得到了hy911射流核形狀、速度分佈以及液滴尺寸的初始分佈。 -
In this thesis, the fields of velocity in the area near the wall and the core area are discussed in stress. thinking about the fluctuate characters of flow in cfb boiler, the rules of particles flow is summarize according to macro analysis
文中著重對近壁區和中心區的速度場進行了討論，分析了不同的工況條件下，顆粒的速度變化趨勢，結合循環流化床流動的脈動特點，從宏觀上總結出顆粒流動特性。 -
This paper projects a utility subdividing drive system of step motor, which consists of digital control module, drive module and power module, it uses at89c52 single chip processor as the core, it realizes the external event or generates control signal by i / o interface, timer and external interruption, the system introduce pld device and isp technology to the design of phase sequencer, it simplified circuit and improved the anti - disturbing capability by using abel - hdl language, this system can realizes data memory, velocity digital control and led display, etc. this paper adopted firstly the single - chip technique to design control system, which replaced old complicated logic control circuit and simplified test process
本文研究了一種實用的步進電機細分驅動系統，由數字控制模塊、驅動模塊和電源模塊組成，系統以at89c52單片機為核心，通過單片機的i o口、定時器計數器中斷來實現外部事件監控以及控制信號的產生，系統將可編程邏輯器件（ pld ）器件和在系統編程（ isp ）新技術引入到細分驅動環行分配器的設計，通過abel _ hdl語言編程實現硬體軟化設計和邏輯重構，大大簡化了電路，並提高了電路抗干擾能力。使系統實現參數存儲，速度數字控制，數碼顯示，進退刀控制等功能。 -
( 5 ) discovered a abnormal law that the sonic velocity was enlarged with increasing of die core porosity in the sandstone reservoir of the haojiagou formation in triassic, and gave a geologic interpretation about the phenomenon. it was helpful to convert the sonic velocity into die porosity correctly in reservoir. ( 6 ) gave a primary reason for producing a little oil and gas in the well ha - 2 and ha - 3 of the sidaogou structure
通過取心段地層巖性與聲波測井速度分析，首次發現郝家溝組儲層段巖芯孔隙度與聲波時差（聲波速度）存在反常變化規律，並對這種現象進行了較合理的地質解釋；提出了儲層預測中應注意的問題，首次提出在本區按常規方法利用聲波時差換算孔隙度存在陷阱。
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