Spiritual Enlightenment From Language on English Learners

Language could be performed well with people who are familiar with the background and other factors of this language. As foreign language learners, performing well depends on knowledge of the attribute property of language and the post-natal education which plays a major role in language learning. Compared with the former one, post-natal education could be concerned by more and more learners. It is also an approach for English learners to know more about English and some relevant points.     

论物权法平等保护原则的内涵

物权法作为民法典的一部分，其基本要求便是对权利人的权利进行平等保护。物权法首次将平等保护原则写入其中，是对《民法通则》第七十五条的深刻反思。必须改变传统民法对国家财产实行特殊保护的观念。公民合法取得的财产应当受到与对国家财产和集体财产同等的法律保护．使人民群众积累的财产能够受到切实的保障．这也是物权法引进这一原则的重要意义所在。鉴于此，有必要对这一原则的基本内容和科学内涵及应注意的问题作一些概括的分析。     

黎曼可积的周期函数的若干性质

本文给出黎曼可积的周期函数的定义,并给出黎曼可积的周期函数的5条性质及其详细证明.     

Fluorinated star‐shaped block copolymers: Synthesis and optical properties

Tetrakis(4‐(1‐bromoethyl)phenyl)silane is synthesized and utilized to initiate the atom transfer radical polymerization (ATRP) of methyl methacrylate (MMA) to generate bromo‐terminated four‐armed PMMA macroinitiators, which further initiate the ATRP of methylacryloyloxyl‐2‐hydroxypropyl perfluorooctanoate (FGOA) to create fluorinated star‐shaped block copolymers PMMA‐b‐poly(FGOA)s with fluorine content ranging from 0 to 31.7 wt %. The polymerizations are well controlled with the polydispersity indices <1.30. The polymers readily dissolve in common organic solvents and show good film‐formation. Compared with the nonfluorinated sample, the fluorinated films exhibit significantly increased water contact angles owing to the enrichment of fluorine on the surface. The enhanced hydrophobicity is advantageous for the optical stability when the devices work under a moist environment. Moreover, the films possess high thermo‐optic coefficients, tunable refractive indices, and extremely low birefringence coefficients because of the presence of bulky and rigid tetraphenylsilane core and star‐shaped topological structure, showing potential application in optical waveguide devices. © 2016 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2016 , 54, 1969–1977     

Synthesis,Characterization, and Property Evaluation of a Hydrophobically Modified Polyacrylamide as Enhanced Oil Recovery Chemical

A novel hydrophobically modified polyacrylamide p(AM/NaA/OP-10-AC/BOAM) was successfully synthesized via an aqueous micellar copolymerization method from acrylamide (AM), sodium acrylate (NaA), octylphenol polyoxyethylene acrylate (OP-10-AC), and small amounts of N-benzyl-N-octylacrylamide (BOAM), with the aim of investigating the copolymer's rheological behaviors under various conditions such as polymer concentration, shearing, temperature, and salinity. The copolymer was characterized by infrared spectroscopy, scanning electron microscopy, and atomic force microscope. Scanning electron micrographs show large aggregates in solution formed by the association from the hydrophobic groups of the copolymer. Compared with partially hydrolyzed polyacryamide (HPAM), the copolymer shows a much higher thickening capability and a much greater ability to resist shearing, heat, and salts. This good property of the copolymer is attributed to its three-dimensional dimensional network structure. According to the core flooding test, it can be obtained that oil recovery is enhanced about 4.3% by the copolymer flooding contrasted to the HPAM flooding in mid-low permeability cores under conditions of 1500 mg/L of polymers and 45°C. All the results prove that the copolymer has the capability of increasing oil recovery by improving waterflood sweep efficiency in high-salinity reservoirs.     

低温烧结NaBi(WO4)2陶瓷的介电性能

采用固相合成法制备了（WO₄）₂（NBW）陶瓷，研究了NBW陶瓷的相结构、形貌、烧结特性和微波介电性能。NBW陶瓷在625~800℃烧结1~4 h能够致密化。X射线衍射表明在625~800℃烧结2 h的NBW陶瓷均为四方晶系白钨矿结构的单相陶瓷。随着烧结温度的提高，NBW陶瓷的介电常数、品质因数（Qf值）先增加后降低，谐振频率温度系数逐渐降低。经650℃烧结2 h获得的NBW陶瓷的介电常数为14.36，Qf值为16 503 GHz，谐振频率温度系数为-1.055×10-5℃^-1。NBW陶瓷与银共烧反应生成Ag₂W₂O₇相，而与Au、Al共烧具备化学兼容性。     

Structural and electronic properties of chiral single-wall copper nanotubes

The structural,energetic and electronic properties of chiral(n,m)(3≤n≤6,n/2≤m≤n)single-wall copper nanotubes(CuNTs)have been investigated by using projector-augmented wave method based on density-functional theory.The(4,3)CuNT is energetically stable and should be observed experimentally in both free-standing and tip-suspended conditions,whereas the(5,5)and(6,4)CuNTs should be observed in free-standing and tip-suspended conditions,respectively.The number of conductance channels in the CuNTs does not always correspond to the number of atomic strands comprising the nanotube.Charge density contours show that there is an enhanced interatomic interaction in CuNTs compared with Cu bulk.Current transporting states display different periods and chirality,the combined effects of which lead to weaker chiral currents on CuNTs.     

论中国传统文化中的知识产权本土资源及其开发对策——以文化价值杠杆为视角

从文化价值杠杆的角度,分析了传导知识产权文化价值的杠杆及其在中国传统文化中的存在形式,并认为这些形式就是中国传统文化中的知识产权本土资源,包括中国传统文化中的人格权概念、义利观理论、重教思想以及诚信文化。这些本土资源都是间接资源,不能照搬,必须合理转化或开发。本文提出了相应的开发对策。     

解析几何教学中应注意的几个问题

指出了解析几何常用教材、教学参考书中存在的解法不通用、应用代数条件不准确、消参数忽视等价性等几处瑕疵,相应地提出了解析几何教学中应该注意的几个问题.     

Novel organometallic aromatic polyester based on ferrocene

<正>A novel polyester containing ferrocenyl was prepared by low-temperature interface polycondensation of 1,1'-ferrocenedicarboxylic acid chloride with 4-(4-hydroxyphenyl)-2,3-phthalazin-1-one(DHPZ),which is a twisted non-coplanar heterocyclic bisphenol-like monomer.The newly generated polymer was evaluated based on characterization of its solubility,viscosity measurements,elemental analysis,FTIR spectroscopy,differential scanning calorimetric and thermogravimetric studies.