混合饲料自动配料系统的设计原理

介绍一套混合饲料自动配料系统的设计原理.并着重介绍其基本组成,微电脑配料仪硬件以及控制程序模块等.实践证明,该系统配料速度快,混合比精度高,抗干扰能力强,并且具有实时报表处理,仓库管理等功能.     

试论高校科技产业的管理体制与运行机制

该文在分析高校科技产业现状的基础上,提出了高校科技产业管理体制的构思与运行机制的设想.     

消除风向模糊性的一种方法

针对高频雷达探测海面风向存在模糊性的问题,提出了一种简单易行的多波束最小差值算法.应用该方法对OSMAR2000在东海的数据进行风场反演,并和观测船实测结果对比,两者吻合甚好,风向平均误差为20°,探测距离可达200km.     

套代数弱闭模中迹类算子的分解

设 U是 Hilbert空间上套代数的弱闭模 ,T∈ U.本文证得 :若 T为秩 n算子 ,则存在 n个秩一算子 {Ri}n1 U,使得 T =∑ni=1Ri,并且‖ T‖1=∑ni=1‖ Ri‖ 1;若 T为迹类算子 ,则 T可表示为一个迹范数绝对收敛级数 ,其中构成该级数的每一项都是 U中的秩一算子 ,并且‖ T‖ 1=inf ∑∞i=1‖ Ri‖1∶ T =∑∞i=1Ri,Ri ∈ U,rank Ri =1 ,∑∞i=1‖ Ri‖1<∞ .利用该结果 ,得到了算子到 U的距离公式     

AB_2型储氢材料表面吸氢的光电子谱研究

AB2 型金属间化合物是新型的储氢材料 ,对 Zr V2 和 Zr Mn2 表面吸氢前后进行了紫外光电子谱( UPS)测量 .吸氢前后的差谱中 ,发现 Zr V2 吸氢后 ,结合能在 8e V左右出现较宽的吸附氢诱导的光电子谱峰 ;而 Zr Mn2 吸氢后 ,在 5e V左右有一个明显的峰 .实验结果表明 :氢在 Zr V2 表面的吸附所成M—H键的电子态的结合能比 Zr Mn2 表面上的要大 ,与 Zr V2 吸氢能力较强是一致的     

Time‐resolved coherent anti‐Stokes Raman spectroscopy impulsively excited by supercontinuum

Time‐resolved coherent anti‐Stokes Raman scattering (CARS) impulsively excited by a supercontinuum (SC) is investigated. We show that it is critical to optimize the temporal overlapping of the constituent solitons of a SC in order to impulsively excite vibrational modes over a broad frequency range. The cross‐correlation frequency‐resolved optical gating technique is utilized to retrieve the optical response function of molecules under SC impulsive excitation, and background‐free CARS with spectral resolution significantly better than the bandwidth of the probe pulses is achieved. Copyright © 2011 John Wiley & Sons, Ltd.     

Deformations of Fuchsian Systems of Linear Differential Equations and the Schlesinger System

We consider holomorphic deformations of Fuchsian systems parameterized by the pole loci. It is well known that, in the case when the residue matrices are non-resonant, such a deformation is isomonodromic if and only if the residue matrices satisfy the Schlesinger system with respect to the parameter. Without the non-resonance condition this result fails: there exist non-Schlesinger isomonodromic deformations. In the present article we introduce the class of the so-called isoprincipal deformations of Fuchsian systems. Every isoprincipal deformation is also an isomonodromic one. In general, the class of the isomonodromic deformations is much richer than the class of the isoprincipal deformations, but in the non-resonant case these classes coincide. We prove that a deformation is isoprincipal if and only if the residue matrices satisfy the Schlesinger system. This theorem holds in the general case, without any assumptions on the spectra of the residue matrices of the deformation. An explicit example illustrating isomonodromic deformations, which are neither isoprincipal nor meromorphic with respect to the parameter, is also given.The research of Victor Katsnelson was supported by the Minerva Foundation.     

束流发射度对质子照相色差模糊的影响

分析了质子照相过程中发射度的增长过程。开展了照相系统设计,针对设计的照相系统,采用理论分析和蒙特卡罗计算的方法,具体分析了各个发射度增长因素的影响程度。分析结果表明:对于高能质子照相,加速器的引出发射度对系统的色差模糊的影响可以忽略,但对于中能质子照相,加速器的引出发射度不可忽略。可通过提高加速器引出系统的聚焦能力和减小散束器的厚度来减小发射度影响。