Banach空间上Lipschitzian映射的渐近行为

设X是具Frechet可微范数或Opial条件的一致凸Banach空间，C是X的非空有界闭凸子集，｛Tn｝n=1^∞是C上渐近非扩映射,文中主要证明了：若存在x0∈C，使得ωω（x0）∪→AF（S）和lim supm→ ∞lim supn→ ∞||TnTmx0-Tnx0||=0成立，则存在p∈AF(S),使得Tnx0ω↑→p。     

Banach空间中渐近非扩张映射的收敛定理

设X为具有Opial条件的一致凸Banach空间，C为X的非空有界闭凸子集，T，S为C到自身的2个渐近非扩张映射且T和S有公共的不动点．本文主要考察了一种带误差的迭代逼近T和S有公共的不动点，在迭代参数{an}，{bn}，{cn}，{a‘‘b}，{b‘‘n}，{c’n}的适当假设下，证明了所构造的带误差的迭代序列弱收敛于T和S的某个公共不动点，并考察了这种迭代序列的强收敛性。     

广义渐近拟非扩张型映象不动点的逼近

本文讨论了Banach空间中非空闭凸子集上的广义渐近拟非扩张型映象的迭代逼近问题,给出了具误差的修改的Ishikawa迭代序列{xn}强收敛到广义渐近拟非扩张型映象T不动点的充要条件：设E是Banach空间,C是E中的非空闭凸子集,T∶C→C是广义渐近拟非扩张型映象,其渐近系数kn满足∑∞n=1（kn-1）〈∞,又设F（T）有界,且T在F（T）中的点处一致连续。任取一点x0∈C,{xn}是根据xn＋1=αnxn＋βnTnyn＋γnunyn=ξnxn＋ηnTnxn＋δnvn定义的具误差的修改的Ishikawa迭代得到的,其中{un},{vn}是C中的两个有界点列,{αn},{βn},{γn},{ξn},{ηn},{δn}是[0,1]中的6个数列且满足αn＋βn＋γn=1,ξn＋ηn＋δn=1,∑∞n=1βn〈＋∞,∑∞n=1γn〈＋∞。则{xn}强收敛于T的不动点的充要条件是limn→∞infd（xn,F（T））=0,其中d（x,A）为x到集合A的距离。本文的结果推广改进了文献[1-7]中的结论。     

渐近非扩张映射修正的Ishikawa迭代程序收敛定理

主要在E*具有KK性质等条件下证明了T存在不动点当且仅当由修正的Ishikawa迭代程序xn+1=tnTnyn+(1-tn)xn yn=snTnxn+(1-sn)xn所定义的序列{xn}弱收敛且xn-Txn→0.设C是一致凸Banach空间E的非空有界闭凸子集,T:C→C是渐近非扩张映射.     

实Banach空间中Lipschitzφ-半压缩算子的不动点的带误差项的迭代逼近

设 K是实 Banach空间 X中非空凸子集 ,T:K→K为 Lipschitzφ-半压缩算子 ,设 { an} ,{ bn} ,{ cn} ,{ a′n} ,{ b′n} ,{ c′n}为 [0 ,1 )中实数列且满足一定条件 ,{ μn}∞n=0 和 { νn}∞n=0 是 K中两任意有界序列 ,则带误差项的Ishikawa型迭代序列 { xn} ∞n=0 强收敛于 T的唯一不动点 ;一个相关结果处理含 φ-拟强增生算子的方程解的带误差项的 Ishikawa型迭代逼近 .     

关于Banach空间中有限多个渐近伪压缩映像的迭代格式

设E是实Banach空间,K是E的非空有界闭凸子集,设Ti:K→K,i=1,2,…,N,是N个一致渐近L-Lipschitzian,具序列{ε(i)n}的一致渐近正则和具序列{k(i)n}的渐近伪压缩映像,其中{k(i)n}和{ε(i)n},i=1,2,...,N满足某些适当条件.对给定的x1∈K,给出了一个关于映像Ti,i=1,2,…,N的具扰动映像的混合迭代格式.证明了由此迭代格式生成的序列{xn}满足:xn-Tlxn→ 0(n→∞),l∈{1,2,…,N}.     

一类差分方程正解的渐近性

考虑时滞差分方程xn 1=xn^aexp(γn(1-xn-kn))，n=0，1…其中a∈(0，1]，{γn}为非负实数列，{kn}为非负整数列，{n-kn}非单调递减，且limn→∞(n-kn)=∞，给出了保证方程每一正解趋于其正平衡点的一族充分条件，推广和改进了相关文献中的结论．     

凸度量空间内广义渐近拟非扩张映射不动点的迭代

在凸度量空间中,引入一类比渐近拟非扩张映射更加广泛的广义渐近拟非扩张型映射,并给出带误差修改的Ishikawa迭代序列收敛于广义渐近拟非扩张型映射不动点的充要条件:设X是一个完备凸度量空间,T∶X→X是一个广义渐近拟非扩张型映射,其渐近系数kn满足∑∞n=1kn< ∞,并且F(T)非空。假定{xn}n∞=1是带误差修改的Ishikawa迭代序列,在对参数的一定限制下,{xn}n∞=1收敛于T的不动点,当且仅当lim infn→∞d(xn,F(T))=0。     

渐近非扩张映射的不动点三步迭代

设D是一致凸空间中的非空紧凸子集,T:D→是渐近非扩张映射且F(T)≠,kn≥1,∑∞n=1(kn-1)<∞,设{un},{u′n},{u″n}是D中有界序列,{an},{bn},{cn},{a′n}{b′n}{c′n}{a″n},{b″n},{c″n}是[0,1]中序列且满足:i)an+bn+cn=a′n+b′n+c′n=a″n+b″n+c″n=1;ii)b″n,b′n∈[a,b](0,1);bn∈[0,b];iii)∑∞n=1cn<∞,∑∞n=1c′n<∞,∑∞n=1c″n<∞.对x1∈D,定义:zn=anxn+bnTnxn+cnun;yn=a′nxn+b′nTnzn+c′nu′nn≥1;xn+1=a″nxn+b″nTnyn+c″nu″n则{xn},{yn},{zn}强收敛于T的不动点.     

渐近非扩张映象的粘性逼近序列的强收敛定理

假设E是具有一致Gateaux可微范数的实Banach空间,D是E的非空闭凸子集,f∶D→D是压缩映象,T∶D→D是渐近非扩张映象。设粘性逼近序列{xn}定义为xn 1=αnf(yn) (1-αn)Tnyn,yn=βnxn (1-βn)Tnxn(n≥0),其中αn∈[0,1],βn∈[0,1]。本文给出了{xn}强收敛于T的不动点的充要条件:若{αn}满足如下条件:limn→∞αn=0,∑∞n=0αn=∞,定义一簇压缩映象Sn∶D→D为Sn(z)=(1-dn)f(z) dnTnz,z∈D,其中dn=ktnn--αα,tn∈(α,1)(n=1,2,…),limn→∞tn=1且k2n-1≤(1-dn)2,n≥n0,设zn∈D是Sn的唯一不动点,即zn=Sn(zn)=(1-dn)f(zn) dnTnzn,n≥1,若limn→∞‖xn-Txn‖=0且{zn}强收敛于z*∈F(T),则{xn}强收敛于z*∈F(T)的充分必要条件是{yn}有界。本文的结果不仅是对Reich公开问题的解答,而且是对Reich[1-2]、Shioji和Takahashi[3]、张石生[4]相应结果的推广。     

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.     

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.     

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.     

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.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

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。     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.     

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.