By simulated supersonic combustion in ‘ double - chamber ’ , wall - pressure value is compared with experimented data . the simulated values accord well with experimented data 通過對“雙燃室”結(jié)構(gòu)的數(shù)值模擬,將壁面壓力值與實(shí)驗(yàn)值對比,其計(jì)算值較好地符合了實(shí)驗(yàn)值。
12 representative sub - basins , in which two interim simulated values in 1993 and 2000 varied significantly , are chosen . then the relation between the land use and simulation value in those sub - basins is analyzed 選擇了1993年和2000年兩期中模擬值變化較大的12個(gè)典型子流域,分析了兩期土地利用變化與模擬值之間的關(guān)系。
The error of the capacitance , electrostatic force and sensitivity between the computed values got from these models and the simulated values got from ansys for different angle of decline are researched 用有限元工具ansys中的電場模塊,分析了傾斜電容極板的電場邊緣效應(yīng)。分析了文中所用的電容和靜電力模型的計(jì)算值和模擬值間的誤差。
It showed that the simulated value are in accordance with the experimental value by contrast of them . it indicates that the numerical modeling can reflect the status of soil moisture movement under the condition of water storage pit irrigation , and its method of solution is feasible 3 .將計(jì)算結(jié)果與實(shí)測結(jié)果進(jìn)行對比,可以看出兩者有較好的一致性。說明所建立的數(shù)學(xué)模型能夠反映蓄水坑灌條件下的土壤水分運(yùn)動狀況,其數(shù)值求解方法也是可行的。
A new calculation method for optimizing diesel engine performance , called nonlinear regression - mess method , is put forward . in this paper , 25 groups of simulated values are calculated from the diesel engine working model , specific fuel consumption , peak pressure , rate of pressure rise , nox and peak temperature are fitted into explicit function about compression ratio and fuel injection advance angle 本文利用柴油機(jī)工作過程模型,得出25組模擬計(jì)算數(shù)據(jù),利用非線性回歸將油耗、最大爆發(fā)壓力、壓力升高率、 no _ x濃度及最高燃燒溫度擬合成壓縮比和噴油提前角的顯函數(shù),并用網(wǎng)格法進(jìn)行優(yōu)化,用c語言編制了優(yōu)化計(jì)算程序,得出最佳的壓縮比和噴油提前角,使其優(yōu)化匹配。