Kinetic Behavior of Aggregation-Exchange Growth Process with Catalyzed-Birth

We propose an aggregation model of a two-species system to mimic the growth of cities' population and assets,in which irreversible coagulation reactions and exchange reactions occur between any two aggregates of the same species,and the monomer-birth reactions of one species occur by the catalysis of the other species.In the case with population-catalyzed birth of assets,the rate kernel of an asset aggregate Bκ of size k grows to become an aggregate Bκ 1through a monomer-birth catalyzed by a population aggregate Aj of size j is J(k,j) = Jkjλ.And in mutually catalyzed birth model,the birth rate kernels of population and assets are H(k,j) = Hkjη and J(k,j) = Jkjλ,respectively.The kinetics of the system is investigated based on the mean-field theory.In the model of population-catalyzed birth of assets,the long-time asymptotic behavior of the assets aggregate size distribution obeys the conventional or modified scaling form.In mutually catalyzed birth system,the asymptotic behaviors of population and assets obey the conventional scaling form in the case ofη =λ= 0,and they obey the modified scalingform in the case of η = 0,λ= 1.In the case of η = λ = 1,the total mass of population aggregates and that of asset aggregates both grow much faster than those in population-catalyzed birth of assets model,and they approaches to infinite values in finite time.     

A Bilinear Backlund Transformation and Lax Pair for a （1＋1）-Dimensional Differential-Difference sine-Gordon Equation

In this paper, we obtain a 1＋1 dimensional integrable differential-difference model for the sine-Gordon equation by Hirota＇s discretization method. A bilinear Backlund transformation and the associated Lax pair are also proposed/or this model.     

λ-可加模糊测度的一般形式及分布特征

指出在信息处理与决策中应用λ-可加模糊信息测度评价信息的必要性。讨论λ-可加模糊测度的转换函数构造法,给出其转换函数的一般形式,并指出λ-可加模糊测度分布函数的性质,重点分析经典分布参数的变化对λ-可加模糊测度的影响,进而说明:λ-可加模糊测度是一种刻画理性多样性的有效方式,它可用于表达决策人或行为人对共同的小概率事件的激进或者保守的评价。     

A Generalized Blow up Criteria with One Component of Velocity for 3D Incompressible MHD System∗

In this paper, the authors study the global regularity of the 3D magnetohydrodynamics system in terms of one velocity component. In particular, they establish a new Prodi-Serrin type regularity criterion in the framework of weak Lebesgue spaces both in time and space variables.     

三维全息原子场作用矢量用于吡咯类抗艾滋病药物QSAR研究

采用三维全息原子场作用矢量(3D-HoVAIF)对32个吡咯类抗艾滋病药物进行结构参数化表征,并与其活性建立定量构效关系。分别采用多元线性回归(MLR)和偏最小二乘(PLS)进行建模,建模的复相关系数(R2cum)、交互校验复相关系数(Q2cum)和模型的标准偏差(SD)分别为R2cum=0.914、Q2cum=0.812、SD=0.236(MLR);R2cum=0.836、Q2cum=0.719、SD=0.314(PLS),结果均优于文献值(R2cum=0.667,Q2cum=0.581,SD=0.420)。所建模型具有良好的稳定性和预测能力,表明3D-HoVAIF能够较好地表征该类分子的结构,值得进一步推广应用。     

不同复合角对平板气膜冷却特性影响的实验研究

本文对不同复合角的典型单排孔冷却结构的平板气膜冷却特性进行了实验研究,研究对象为α为30°,β分别为30°、45°、60°的射流孔板,对它们在不同吹风比条件下的绝热气膜冷却效率分布特性进行了分析.实验结果表明,所有复合角条件下的冷却性能都优于相同条件下的简单角; M=0.5、β=60°时的冷却性能明显优于其他两个复合角;M=1.0时.三者的下游横向平均冷却效率相差不大; M=1.5、β=30°时的冷却性能最优.     

近零排放双燃料多功能系统特性规律分析及优化

本文对煤/天然气双燃料氢电联产多功能系统进行了特性规律分析.从燃料互补和能量综合梯级利用角度,分析了重整条件、氢气分离率对系统节能率的影响,以及多功能系统特征参数的变化规律,得到了新系统可以提高燃料化学能利用效率,同时可以降低CO2分离能耗的结论.在能量利用上的优势和对CO2的有效控制,使得新系统相对参考系统可以实现低能耗分CO2.     

New construction of special Lagrangian submanifolds in T^＊R^n equipped with the standard metric

A class of twisted special Lagrangian submanifolds in T~*R~n and a kind of austere submanifold from conormal bundle of minimal surface of R~3 are constructed.     

电容放电式脉冲励磁电源研究

 针对大型直线感应加速器单次工作的特点,研制了一种电容放电式脉冲励磁电源。该电源利用电容器的储能特性,取代常规电源的变压整流滤波部分,先对其以小电流恒流充电,然后再以大电流恒流放电来获得直线感应加速器励磁电流。对这种电源进行了理论分析和模拟计算,模拟结果与实验结果基本一致。实验结果表明：这种电源能够脉冲工作,同时输入功率大幅度降低,在输出电流500 A,持续时间0.3 s时,输入功率400 W,输出功率25 kW,电流稳定度0.2%, 谐波小, 电流纹波小,所用电容器100块左右(33 mF),经济上也可承受,是一种非常适合直线感应加速器的励磁电源。     

高功率毫米波辐照鼠疼痛阈值及应激反应

 高功率8 mm波辐照时,大小鼠均产生热应激反应,依次经历平静期、警戒期、相持期和衰竭期。鼠的热痛阈值温度为(43.1±1.8) ℃,这一阈值与鼠的质量、初始温度、辐照功率密度等无关。 辐照3 s时：辐照功率密度为3.5 W/cm2时体表温升为(8.4±1.0) ℃;辐照功率密度为7.0 W/cm2时温升为(21.1±3.0) ℃。实验还测定了警戒期持续时间,结果表明动物应激反应的剧烈程度与警戒期持续时间相关。建立了小鼠警戒期持续时间与小鼠体表面积、有效辐照面积、辐照功率密度之间的关系,并将这一实验结果推广到大鼠。