多维广义线性模型极大拟似然估计的渐近正态性

对固定设计的多维广义线性模型, 在λ(1/2/n)(1)/(2)λn/n→0和其他一些正则性条件下,证明了自然联系函数下的拟似然方程n∑i=1xi(yi-μ(x′iβ))=0 的解β^n即拟似然估计的渐近正态性, 其中,λn(λn) 表示∑ni=1xix′i的最小(最大)特征根, xi是有界的p×q回归变量,yi 是q×1响应变量.     

自适应广义线性回归拟似然估计渐近理论

研究自适应设计下的拟似然方程 ∑ni=1xi(yi- μ(x′iβ) ) =0 ,在一定的条件下证明了以概率 1此方程当n充分大时有解^βn,^βn 为β0 的强相合估计 ,且得出了 ^βn- β0的收敛速度 ;然后又在一定的条件下证明了 ^βn 的渐近正态性的一些结果     

多维广义线性模型拟似然估计的渐近正态性

对多维自适应设计广义线性模型中形如sum from i=1 to n xi(yi-μ(x′iβ))=0的拟似然方程,在limn→∞■~(3/4)/■=0和其他一些正则性的假定之下,论文证明了上述拟似然方程的解,即极大拟似然估计的渐近正态性,此结果推广和改善了文[4]中的相关结果,其中■和■分别为sum from i=1 to n xix′i的最小特征根和最大特征根,x是有界的p×q阶设计矩阵.     

自适应设计广义线性回归多维拟似然估计的渐近正态性

文章研究了自适应设计广义线性回归的拟似然方程,在适当条件下,其解^βn具有渐近正态性质。     

缺失数据下广义线性回归拟似然估计的相合性和渐近正态性

研究了形如L(β)=Σ1Zi(yi-μ(ZiTβ))=0的拟似然方程在协变量数据有缺失时,方程未知参数估计的相合性和渐近正态性.假设存在协变量数据完整的一个有效样本,且是总样本的一个简单随机子样本,基于EM算法,提出了一种新的处理协变量中有不完整数据的拟似然方程的求解法,即通过有效数据线性预测补足协变量数据缺失部分,并...     

误差为AR(1)情形的半参数回归模型拟极大似然估计的存在性

在误差为AR(1)时间序列的情形下,给出了半参数回归模型的拟极大似然估计方程,并研究了拟极大似然估计量的存在性。     

广义线性模型中拟似然估计的弱相合性

研究了广义线性模型在非自然联系情形下的拟似然方程     

具非线性中立项时滞微分方程解的振动性

在α≠1且β∈(0,1)情形下研究了一阶具非线性中立项时滞微分方程[x(t)-pxα(t-τ)]′+q(t)xβ(t-σ),t≥t0解的振动性和非振动性,在β∈(0,1)情形下获得了上述方程所有有界解振动的充要条件,同时在α∈(1,∞)且β∈(0,1)情形下获得了上述方程存在无界正解的充分条件.这些新的结果填补了已有文献中空白.     

关于一维模糊随机变量的极大似然估计方法

研究一维模糊随机变量情形总体未知参数的极大似然估计的两种方法——扩张原理法与随机集的可积选择法．在模糊观测条件下,定义了Kwakernaak-Knrse-Meyer型模糊随机变量情形的模糊参数的极大似然估计量及Puff-Ralescu型变量情形的模糊参数的边缘极大似然估计量．得到了它们的存在条件,一致性条件及其相关性质．     

广义线性模型中极大拟似然估计的弱相合性

在λn=O(λn)及其它正则条件满足时,用压缩映射原理证明一般联系函数多维广义线性模型的极大拟似然估计(MQLE)的弱相合性,将误差为独立序列的情形推广到相依序列,其中-λn(λ-n)为矩阵Sn=∑ni=1XiXTi的最大(最小)特征根.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the