velocity fire 中文意思是什麼
velocity fire
解釋
初速試射-
In the article, the originator worked out the mechanism of magnesium - base alloys catching fire ; analyzed briefly the influence of the temperature, the heating velocity and the pressure of oxygen in the atmosphere on the lumps and scraps of pure magnesium ’ s catching fire, and designed a practical method to measure the kindling temperature of the lumps and scraps of pure magnesium precisely, with which the initial quantization of kindling temperature can be realized
本文圍繞鎂合金阻燃技術的開發作了許多基礎性的研究工作，通過分析大量的相關文獻和試驗結果，初步得出了塊狀鎂和鎂屑的燃燒機理，簡要分析了溫度、升溫速度、環境中氧的分壓對塊狀鎂和鎂屑的起火燃燒所產生的影響。設計出了精確度高、實用性強的塊狀鎂和鎂屑的燃點測試方法，使塊狀鎂和鎂屑的燃點得到初步的量化。 -
Analyses the smoke characteristics in the development of fire and obtains its changing curves. according to different fire loads, studies the changing relation between the critical velocity and fire intensity
摘要分析了地鐵火災煙氣特性隨火災發展過程的變化情況，得到了煙氣特性變化曲線。針對不同的火災荷載，研究了臨界風速隨火災強度的變化關系。 -
Hence, it is necessary that we should find out the effective and available scenario of fire ventilation to control the longitudinal velocity exceeding the " critical velocity " and push all of the smoke out of the tunnel
一旦發生火災，後果不堪設想。為此，我們有必要研究出一套切實可行的應急通風火災控制方案，以盡量將火災所造成的危害降到最低。該項研究具有極強的應用性和迫切性。 -
Computational fluid dynamics ( cfd ) techniques are used to study and understand fluid behavior in tunnels. by simulating complex specific operational cases, we can educe velocity or flux distribution in tunnel under different ventilation and resistance situation and determine the favorable operational procedures of the erlang mountain tunnel ventilation in a fire case. comparison has been made between a simulation and experiment for some cases in order to prove the cfd model is powerful, so that enables the study of cases for which experimental data is not available
採用本文將隧道內的氣流看成是理想流體的一維恆定流動，通過對二郎山特長公路隧道半橫向通風系統建立隧道內的空氣動力學模型，利用計算機進行數值分析與計算，得出發生火災時，不同通風阻力條件下隧道中的風速分佈及流量分佈，並通過實驗室隧道模型實驗進行驗證與修正，依據研究結果給出了二郎山半橫向通風隧道的火災控制方案，從而解決了二郎山公路隧道通風對火災的控制問題，同時為半橫向通風公路隧道的火災通風提供科學的方法。 -
Abstract : aimed at the accident of chatching fire of a certain type of self - propelled antitank gun s chamber, the paper analyses the normal burning of powder and the efficiency of the gun s extracting device and other factors affecting the burning velocity, makes an improvement on the weapon system, and puts forward the requirements for using the gun under army conditions
文摘:針對某型自行火炮實彈射擊中戰斗室彈藥倉內半可燃藥筒起火燃燒事故，通過對可燃藥筒完全燃燒的理論分析和火炮抽氣裝置結構效率分析以及可能影響藥筒燃燒速度的其他因素分析，提出武器系統及可燃藥筒改進意見，並對部隊條件下的使用提出了要求，對改善裝備性能，預防事故發生具有重要意義。 -
His fire was waiting incandescent, his steam was at high pressure, in a few seconds he could make the long strap move at an invisible velocity
他已經把煤火燒紅了，已經把蒸汽的壓力貯足了在幾秒鐘之內，他就能夠讓那根皮帶以看不見的速度轉動起來。 -
In the simulation model, the cellular automata model is applied to describe the tunnels system, and a cellular is used to represent an energy unit of flame, which is eradiated from the fire - point and contains such status parameters as temperature, velocity, smog density, density of poisonous gases
在該方法中，用元胞自動機模型描述地下礦巷道網路系統，用元胞來描述火焰蔓延能量單元，該單元用火焰溫度、蔓延速度、煙霧濃度和有毒氣體濃度等狀態參數來描述。 -
In order to improve the accuracy of artillery fire corrections, this essay, having been integrated with the project " research on how to determine the muzzle velocity reduction of the piece " issued by the arms department of the general staff headquarters of pla, deals with a new method of measuring the muzzle velocity reduction of the piece
部隊測定火炮初速減退量的傳統方法是藥室增長量法。該方法已不能滿足現代炮兵精確火力打擊要求。為提高炮兵射擊修正精度，本文結合總參兵種部下達的「確定火炮初速減退量方法研究」項目，研究了一種測定火炮初速減退量的新方法。 -
Abstract : the relationships between the residual strength of the tunnellining damage due to high temperature and ultrasonic velocity were studied on the basis of the experiments on the concrete and members of the tunnel the tunnel damaged by fire were discussed
文摘:在對隧道襯砌混凝土和構件進行實際燒損試驗基礎上，探討了襯砌在高溫作用后殘余強度與超聲波速之間的關系，以及超聲檢測技術用於測試隧道火災損傷的適用性和和可靠性。 -
Numerical simulation and analysis of smoke characteristics and critical velocity in underground railway tunnel while fire
地鐵隧道火災煙氣特性與臨界風速的數值模擬分析 -
Simulation results showed that cppga improved the convergence velocity and search probability of optimization solution, and got good optimization strategy for fire distribution
模擬結果表明，混沌偽并行遺傳演算法比偽并行遺傳演算法和簡單遺傳演算法具有更快的收斂速度和更高的最優解搜索成功率，可對火力分配進行優化。 -
In this paper, the basic and important parts are studied. for example, the capacity of jet fan in tunnel, the flux distribution and resistance loss in the chimney. this approach is capable of modeling multi - dimensional, time dependent nature of fire in a road tunnel, this paper presents the critical ventilation velocity in various heat release rate and smoke release rate for jingfu highway
以京福高速公路美菰林隧道的結構參數為依據，當隧道內發生火災時，對隧道煙霧隨時間的發展擴散過程進行了動態的模擬與研究，得出了不同的火災放熱率、發煙率的情況下，控制隧道煙霧迴流的臨界風速這一關鍵數據，為隧道突發火災時的緊急通風控制提供參考。
分享友人