搜索结果: 1-15 共查到“T ax”相关记录19条 . 查询时间(0.061 秒)
禾谷镰刀菌Fusarium graminearum可引起小麦赤霉病，该病严重威胁我国小麦的质量安全。本研究从生物防治的角度出发，分离筛选拮抗菌，研究拮抗菌的拮抗特性和拮抗能力。试验采用系列稀释法和平板对峙法从小麦样品中分离筛选获得禾谷镰刀菌拮抗菌AX-3，根据16S rDNA基因、gyrB基因序列构建的系统发育进化树以及生理生化特性结果，菌株AX-3被鉴定为解淀粉芽胞杆菌Bacillus amyl...
The hrsc-ax mt. etna project: high-resolution orthoimages and 1 m dem at regional scale
High Resolution Aerial Digital Cameras DEM/DTM Orthoimages Hazard Mitigation
2015/9/1
Digital photogrammetric sensor systems that have become available during the last years provide a high potential for generating high-resolution digital elevation models (DEM) and orthoimages for large...
Dyadic sets, maximal functions and applications on ax+b,-groups
Exponential growth group Dyadic set Complex interpolation Hardy space BMO
2011/10/10
Let S be the Lie group{mathbb R}^nltimes {mathbb R}$, where ${mathbb R}acts on {mathbb R}^n by dilations,endowed with the left-invariantRiemannian symmetric space structure and the right Haar measure ...
Let a and b be positive integers and let p be an odd prime such that p =ax2+by2 for some integers x and y.
Unitary representations of a loop ax+b group, Wiener measure and Gamma-function
Unitary representations loop ax+b group Wiener measure Gamma-function
2011/2/24
We construct a family of irreducible unitary representations of the loop affine group of a line (ax+b group) with central extension on the Hilbert space of square integrable functions with respect to ...
Virtual Observatory based identification of AX J194939+2631 as a new cataclysmic variable
High Energy Astrophysical Phenomena (astro-ph.HE)
2011/1/6
We report the discovery of a new cataclysmic variable (CV) among unidentified objects from the ASCA Galactic Plane Survey made using the Virtual Observatory data mining.
主子阵约束下矩阵方程AX=B的对称最小二乘解
对称最小二乘解 矩阵方程 主子阵
2009/10/23
本文主要讨论主子阵约束下矩阵方程AX=B的对称最小二乘解．基于投影定理,巧妙的把最小二乘问题转化为等式问题求解,并利用奇异值分解的方法,给出了该对称最小二乘解的一般表达式．此外,文章还考虑了此对称最小二乘解集合对任一给定矩阵的最佳逼近问题,得到了最佳逼近解,并给出了相应的算法步骤和数值例子．
矩阵方程AX+XB+F对称解的递推算法
矩阵方程 对称解 最佳逼近解
2009/9/28
提出一种求矩阵方程AX+XB=F对称解的递推算法,该算法不仅能够用于对称解存在性的判断问题,而且能够用于对称解的计算问题.选取特殊的初始矩阵时,该算法能够求出矩阵方程的极小范数对称解,以及对给定的对称矩阵进行最佳逼近的对称解.
Ax=b 在 M-阵和 S-阵类中的反问题
Ax=b M-阵 S-阵
2009/9/21
引言对给定的 n 维实向量 x 和 b,欲求某类 n 阶实矩阵 A,使满足 Ax=b,称为线性方程组Ax=b 的反问题.这种问题的实际背景来自控制系统的绝对稳定性.文[2]讨论了上述反问题在正定阵、正交阵等类中有解的条件.本文将研究这种反问题在 M-阵类和 S-阵类中有解的条件.我们利用这两类矩阵的分块判定法,得到了一些充要条件,使问题完满解决.
Pairing-friendly Hyperelliptic Curves with Ordinary Jacobians of Type y2 = x5 + ax
pairing-based cryptography hyperelliptic curves
2009/6/2
An explicit construction of pairing-friendly hyperelliptic curves
with ordinary Jacobians was firstly given by D. Freeman. In this paper,
we give other explicit constructions of pairing-friendly hyp...
Counting Points for Hyperelliptic Curves of type y2 = x5 + ax over Finite Prime Fields
Hyperelliptic Curves Finite Prime Fields
2009/4/15
Counting rational points on Jacobian varieties of hyperelliptic
curves over finite fields is very important for constructing hyperelliptic
curve cryptosystems (HCC), but known algorithms for general...
Suitable Curves for Genus-4 HCC over Prime Fields: Point Counting Formulae for Hyperelliptic Curves of type y2 = x2k+1 + ax
Genus-4 HCC Hyperelliptic Curves
2009/3/27
Computing the order of the Jacobian group of a hyperelliptic
curve over a finite field is very important to construct a hyperelliptic
curve cryptosystem (HCC), because to construct secure HCC, we ne...
利用并行方法解AX+XB=C型线性矩阵方程
矩阵方程 脉动阵列 并行算法
2008/12/23
提出了一种新的递推算法用于求解AX+XB=C型线性矩阵方程,这种算法可以用脉
动阵列结构并行实现,该算法和结构还可求解其它几种类似的线性矩阵方程,特殊情况下求解
方程的阵列结构可进一步简化.仿真结果表明,这种并行方法有较高的加速比及效率.
Existence of Limit Cycles in a Predator-Prey System With a Functional Response of the Form Arctan(ax)
Predator prey system limit cycle unctional response
2008/11/25
We consider a predator prey system with the functional response of the form
µ(x) = arctan(ax); a > 0. The main concern in this paper is the existence of
limit cycles for such system. A necessa...
时滞线性系统x·(t)=Ax(t)+Bx(t-τ)稳定性的新判据
2007/12/12
Abstract提出了x·(t)=Ax(t)+Bx(t-τ)时滞
无关稳定的一个充分条件，并进而研究了系统在不满足时滞无关稳定条件下，不稳定特征根
的区域范围，给出了一个与时滞相关稳定的新的充分条件. 文末，给出了本文结论的示例，
并与已有结果进行了比较，表明了该方法的有效性和可行性.