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Search Results: 1 - 10 of 50183 matches for " 苏九清 "
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支护工程钢纤维喷射混凝土试验研究
,李梦成,龚建
人民黄河 , 2006,
Abstract: ?对支护工程中钢纤维喷射混凝土进行了试验研究,结果表明:随着钢纤维用量的增加,喷射钢纤维混凝土的抗拉强度、抗折强度和弯曲韧性指数有不同程度的增加,而抗压强度没有明显的改善.根据试验结果,提出硅灰的适宜掺量范围在5%~7%之间.探讨了硅灰和钢纤维的增强、增韧机理,建立了喷射钢纤维混凝土的密实-骨架模型.
The resonance model and quantum area spectrum of Kerr-Newman black hole
Kerr-Newman黑洞的谐振子模型及量子面积谱

Li Chuan-An,Su Jiu-Qing,
李传安
,

物理学报 , 2006,
Abstract: 利用Kerr-Newman黑洞的质量M,电量Q,角动量J和它们各自的对偶量,πM,πQ,πJ,构成的六维相空间,通过规范变换,首先建立黑洞的简谐振子模型;再利用该模型进一步研究Kerr-Newman黑洞的量子面积谱.
The contribution of the high spinning gravitation field to the static black hole entropy with spherical-symmetry
高自旋场对静态球对称黑洞熵的贡献

Su Jiu-Qing,Li Chuan-An,
,李传安

物理学报 , 2005,
Abstract: Using the improved brick-wall model,the writers of the article have made some r esearches in the contribution made by the high spinning gravitation field to sta tic ball-symmetry black hole entropy. The research shows that in the static bal l-symmetry black hole, the quanta entropy of the gravitation field in whitch th e spinning is 2 is still in direct proportion to the horizon. When the same trun catin genes as theose in scalar guantity field are selected the quanta entropy i s two times in scalar quantity field, and four-sevenths of those in Dirac field .
The statistical entropy of Dirac field in spherically symmetric non-static black hole
球对称动态黑洞Dirac场的统计熵

Meng Qing-Miao,Su Jiu-Qing,Li Chuan-An,
孟庆苗
,,李传安

物理学报 , 2003,
Abstract: In terms of the improved brick-wall model, the statistical entropy of Dirac field in the most general spherically symmetric non-static black hole is calculated. It is shown that the entropy of the black hole is proportional to the area of event horizon at any time. It is noteworthy that the calculating formula for the dynamic proportional coefficient is obtained in this paper. Through calculating these dynamic proportional coefficients, the statistical entropies of the Dirac field in all kinds of the spherically symmetric non-static black hole can be obtained directly.
Statistical entropy of the Dirac field of static spherically symmetric black holes
静态球对称黑洞Dirac场的统计熵

Li Chuan-An,Meng Qing-Miao,Su Jiu-Qing,
李传安
,孟庆苗,

物理学报 , 2002,
Abstract: A statistical entropy of the Dirac field of static spherically symmetric black holes is gvien in this paper by using the improved brick wall model. The result shows that all these entrpies 7/2 times as large as the entropy of a scalar field when the same cutting factors are taken.
Massive particle quantum tunneling radiation of Barriola-Vilenkin black hole with global monopole
带有整体磁单极子的Barriola-Vilenkin黑洞时空中静质量不为零的粒子的量子隧穿辐射

Meng Qing-Miao,Su Jiu-Qing,Jiang Ji-Jian,
孟庆苗
,,蒋继建

物理学报 , 2007,
Abstract: The quantum tunneling framework is adopted to investigate tunneling radiation of Barriola-Vilenkin black hole with a global monopole. We obtain a conclusion that the emission rate of massive particles is related with the change of Bekenstein-Hawking entropy. The emission rates of massless and massive particles take the same functional form. It is consistent with the underlying unitary theory.
Instantaneous radiant emittance of the accelerating non-stationary black hole
加速运动动态黑洞的瞬时辐出度

Meng Qing-Miao,Su Jiu-Qing,Jiang Ji-Jian,
孟庆苗
,,蒋继建

物理学报 , 2007,
Abstract: Using entropy density near event horizon of the accelerating non-stationary black hole, the instantaneous radiant emittance is calculated, and we arrive at the conclusion that the instantaneous radiant emittance of black hole in a direction at any time is always proportional to the quartic power of temperature of the event horizon of black hole in that direction. It is found that the generalized Stefan-Boltzmann coefficient is no longer a constant, but a coefficient dynamically related to the rate of change of event horizon, the structure of space-time near event horizon and the radiation absorption coefficient of the black hole. It shows that an intrinsic relation between the gravitational field around the black hole and its thermal radiation must exist.
硅双极晶体管低温电流增益模型修正
,常旭
半导体学报 , 1996,
Abstract: 多晶硅发射区双极晶体管的低温(77K)电流增益模型建立在理想掺杂近似的基础上.本文由基区电子电流密度Jn和发射区空穴电流密度Jp出发,根据实际掺杂情况中的近似高斯分布,分析了理想掺杂近似对电流增益结果的影响,指出引用这一近似在常温下偏差较小,在低温下则会出现较大的误差.在此基础上,对多晶硅发射区双极晶体管低温电流增益模型作了修正.结果表明,修正后的模型与PISCES模拟结果取得了较好的吻合.
关于阳夏战役三个问题的辨析
,全有
清史研究 , 2002,
Abstract: ?
一个非线性偏微分方程边值问题的对称约化及其数值解
Symmetry Reduction and Its Numerical Solution to the Boundary Value Problem of a Nonlinear Partial Differential Equation
 [PDF]

韩雁, 道毕力格
Advances in Applied Mathematics (AAM) , 2016, DOI: 10.12677/AAM.2016.53046
Abstract: 本文研究了微分方程对称方法在非线性偏微分方程边值问题中的应用。首先,基于微分特征列集算法确定了给定非线性偏微分方程边值问题的多参数对称;其次,利用对称将非线性偏微分方程边值问题化为常微分方程初值问题;最后,利用龙格-库塔法求解了常微分方程初值问题的数值解。
We study the applications of the symmetry method on the boundary value problem for nonlinear partial differential equation. Firstly, the multi-parameter symmetry of a given boundary value problem for nonlinear partial differential equation is determined based on differential characte-ristic set algorithm. Secondly, by using the symmetry, the boundary value problem for nonlinear partial differential equation is reduced to an initial value problem of the original differential equ-ation. Finally, we numerically solve the initial value problem of the original differential equations by using Runge-Kutta method.
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