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基于关键词策略和CNN的中文文本有害信息分类
词向量 分词频文档频率 特征词集合 Word2Vec模型 卷积神经网络
2022/3/23
提出一种新颖的中文文本分类框架。在该框架中，首先基于Word2Vec构建词向量模型，然后采用分词频文档频率（segmentation term frequencydocument frequency,STF-DF）筛选出类别区分能力强的关键词，同时构建一种适合于中文文本分类的卷积神经网络（convolution neural network,CNN）进行分类。实验结果表明，采用该框架使THUCN...
基于开关周期性耦合的混沌系统量化同步
混沌系统 开关周期性耦合 量化同步 耦合强度
2022/3/18
应用比较定理和Lyapunov稳定性理论,通过设计开关周期性静态对数量化控制器以及平均时间耦合强度,实现混沌系统的完全同步。给出的充分条件推广和补充已有文献的结果,同时揭示量化效应及平均时间耦合强度与系统同步的内在规律。最后,仿真实例验证了分析结果的可行性。
基于ESXi性能计数的Nginx负载均衡算法研究
Nginx ESXi性能计数 负载均衡 DWEPC
2022/3/18
在现有Nginx负载均衡算法的基础上，提出基于ESXi性能计数的负载均衡算法(dynamicweightbasedonESXiperformancecounter，DWEPC)，旨在通过均衡集群中的各节点负载，达到降低节点内资源过载的情况，从而提高系统性能。试验表明，相比于Nginx内置均衡算法，DWEPC算法具有更优的效果。
解非线性互补问题的非精确正则化算法
非线性互补问题 全局收敛 局部超线性收敛 非精确正则算法
2022/3/28
构造一个新的光滑逼近函数，通过该函数将非线性互补问题转化为与之等价的方程组问题。建立解该方程组的非精确正则化算法，在该算法中光滑参数与正则参数为彼此独立的变量，且可以通过解线性方程组很快得到。并在较弱的条件下证明了该正则算法的全局收敛性和局部超线性收敛性。
分数阶非线性Schrodinger方程的时间分裂算法
分数阶非线性Schrodinger方程 分裂算法 守恒律 收敛性 数值实验
2022/3/30
主要研究分数阶非线性Schrodinger方程的时间分裂算法，将分数阶非线性Schrodinger方程分裂成一个线性方程和一个非线性方程分别求解。其中，非线性方程可精确求解，并满足“点点守恒”，而线性方程利用Crank Nicolson差分格式离散求解。证明了该算法在离散形式下保持了原方程的质量和能量的守恒性，是无条件稳定的，收敛误差为O(h2+τ2)。最后通过数值实验验证了该算法的可行性和精度...
Notation. For a positive integer n and a commutative ring R, we write R[n] to denote R
Z Z[n] =
R[X]=(n), where n denotes the nth cyclotomic polynomial. Thus, for R = Z[n] with n relatively pr...
MODULAR CURVES AND RAMANUJAN’S CONTINUED FRACTION
modular curve Ramanujan continued fraction
2015/7/6
We use arithmetic models of modular curves to establish some properties of Ramanujan’s continued fraction. In particular, we give a new geometric proof that its singular values are algebraic units
th...
There is reason to expe
t that the 2k-th moment of the Riemann zeta
fun
tion
an be related to the spe
tral theory of GL(k) or GL(2k). The work
of Motohashi [27℄ supports the idea of seeki...
Automorphic forms are generalizations of periodic functions; they are functions on a group that
are invariant under a discrete subgroup. A natural way to arrange this invariance is by averaging.
Eis...
COMPARISON OF PARSING TECHNIQUES FOR THE SYNTACTIC PATTERN RECOGNITION OF SIMPLE SHAPES
algorithms vision pattern recognition understanding
2015/6/2
Syntactic Pattern Recognition is a procedure, widely used in Cartography and Remote Sensing, that trusts upon matching of sections
of maps and/or images or 3D models with archetypes or objects (pars...
School Attendance: Equities and inequities in growth trajectories of academic performance
School Attendance Equities and inequities
2015/6/2
Much of the pedagogical as well as political tension in the discussion about the effects of education on the development of children has been focused on the importance of the quality of education as d...
Over the past two decades, there have been no gender differences in mathematics achievement in Australia in large-scale international surveys such as the Trends in International Mathematics and Scienc...
对偶风险模型中的随机观察
对偶模型 随机观察 折罚函 微积分方程
2014/1/9
研究了随机观察在对偶风险模型中的应用.当罚金函数仅依赖于破产赤字ω(x1,x2)=ω(x2) 时，导出Gerber-shiu期望折现罚金函数 mδ(u) 所满足的微积分方程，并给出了当收益额的密度函数服从指数分布和ω(x)=e-r2x 时，得到mδ(u)的显示解.
We describe a method of solving quantum field theories using operator techniques based on the expansion of interacting fields in terms of asymptotic fields. For bound states, we introduce an asymptoti...
Dual Raviart-Thomas mixed finite elements
finite volumes mixed finite elements Petrov-Galerkin variational formulation
2011/1/19
For an elliptic problem with two space dimensions, we propose to formulate the finite volume method with the help of Petrov-Galerkin mixed finite elementsthat are based on the building of a dual Ravia...