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现代汉语“形-量”结构的句法语义属性探究
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作者 周光磊 高一曈 《世界汉语教学》 北大核心 2024年第3期351-362,共12页
已有研究在“数-形-量-名”结构中量前形容词的语义、形式受到限制的原因和语义指向等问题上尚存争议。本文基于分布式形态学,分析了量前形容词的句法语义特征和“形-量”结构的生成机制,确定了量前形容词的语义准入条件序列、句法投射... 已有研究在“数-形-量-名”结构中量前形容词的语义、形式受到限制的原因和语义指向等问题上尚存争议。本文基于分布式形态学,分析了量前形容词的句法语义特征和“形-量”结构的生成机制,确定了量前形容词的语义准入条件序列、句法投射层级以及在“数-形-量-名”结构中的基础生成位置,认为量前形容词嫁接于量词投射内,修饰量词,从新的视角探讨了量前形容词在语义和形式上受到限制的原因,并从结构和语义两方面回应了量前形容词是否存在“指量”和“指物”的语义指向差异问题。 展开更多
关键词 容词 “形-量”结构 复合 分布式态学 语义指向
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Material Growth and Device Fabrication of GaN-Based Blue-Violet Laser Diodes 被引量:1
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作者 杨辉 陈良惠 +16 位作者 张书明 种明 朱建军 赵德刚 叶小军 李德尧 刘宗顺 段俐宏 赵伟 王海 史永生 曹青 孙捷 陈俊 刘素英 金瑞琴 梁骏吾 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2005年第2期414-417,共4页
Studies on first GaN-based blue-violet laser diodes(LDs) in China mainland are reported.High quality GaN materials as well as GaN-based quantum wells laser structures are grown by metal-organic chemical vapor depositi... Studies on first GaN-based blue-violet laser diodes(LDs) in China mainland are reported.High quality GaN materials as well as GaN-based quantum wells laser structures are grown by metal-organic chemical vapor deposition method.The X-ray double-crystal diffraction rocking curve measurements show the full-width half maximum of 180″ and 185″ for (0002) symmetric reflection and (10 12) skew reflection,respectively.A room temperature mobility of 850cm2/(V·s) is obtained for a 3μm thick GaN film.Gain guided and ridge geometry waveguide laser diodes are fabricated with cleaved facet mirrors at room temperature under pulse current injection.The lasing wavelength is 405 9nm.A threshold current density of 5kA/cm2 and an output light power over 100mW are obtained for ridge geometry waveguide laser diodes. 展开更多
关键词 metalorganic chemical vapor deposition GaN-based laser diodes multiple quantum wells ridge geometry structure threshold current density
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The Conformally Symmetric K-Contact Manifolds
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作者 郭震 《Chinese Quarterly Journal of Mathematics》 CSCD 1992年第1期5-10,共6页
In this paper, we establish a differential equation about scalar curvature of conformally flat K-contact manifolds, and prove that a conformally symmetric K-contact manifold is a Riemann manifold with constant curvatu... In this paper, we establish a differential equation about scalar curvature of conformally flat K-contact manifolds, and prove that a conformally symmetric K-contact manifold is a Riemann manifold with constant curvature 1. At the same time, the results on Sasaki manifolds which are given by Miyazaawa and Yamagushi are generalized to K-contact manifolds. 展开更多
关键词 Conformally symmetric Contact Structure Killing vector field
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A Functional-Structural Model of Rice Seedling Coupled with Nitrogen Metabolism 被引量:1
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作者 Zhuoyang Yusang Lifeng Xu +2 位作者 Weilong Ding Zhangyun Yi Yunwei Qiu 《Journal of Agricultural Science and Technology(B)》 2014年第8期652-660,共9页
With the ability of representing the association and inner-feedback between plant morphological structure and physiological functions, functional-structural plant modeling (FSPM) approach has been used in many works... With the ability of representing the association and inner-feedback between plant morphological structure and physiological functions, functional-structural plant modeling (FSPM) approach has been used in many works, trying to better understand the mechanisms of integrating plant functions and its structure, and their communication with environmental factors. To do so, an FSPM of rice seedling was developed in this study, including structural morphogenetic model, photosynthetic model and biomass partitioning module. It can thus describe the developmental course of the rice structure dynamically based on the processes of biomass producing and partitioning. Furthermore, the processes of nitrogen metabolism, which influence the N content and growth dynamics of the virtual rice, were also considered. The model was developed with L-system on a platform established with Java programming language, which took over the parsing and visualization of the L-system strings to 3D objects using Java 3D extended library. The physiological processes in the model can be modified and further improved to gradually meet the needs for modeling the whole life cycle of rice, e.g., considering the respiration, and interaction with other environmental factors like CO2, temperature, etc.. The model was developed to provide a platform to systematically study and understand how plant systems like rice seedling work. The model and the virtualization platform can be expanded to provide decision support on N fertilizer application for the rice seedling and the other crops. 展开更多
关键词 Functional-structural plant model rice seedling nitrogen metabolism L-SYSTEM VISUALIZATION plant model.
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Cage and ladder structures of silsesquioxanes characterized by UV-MALDI-TOF mass spectrometry 被引量:1
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作者 尤宏 胡立江 +2 位作者 刘琰 张兴文 张皓 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2003年第3期295-299,共5页
The molar mass distribution of SSO in the first generation derived from the hydrolytic condensation oftwo trialkoxysilanes, [ 3- ( Methacryloxy ) propyl ] trimethoxysilane ( MPMS ) and vinyltrimethoxysilane ( VMS ) ,a... The molar mass distribution of SSO in the first generation derived from the hydrolytic condensation oftwo trialkoxysilanes, [ 3- ( Methacryloxy ) propyl ] trimethoxysilane ( MPMS ) and vinyltrimethoxysilane ( VMS ) ,are determined by UV-MALDI-TOF MS. The comparisons of theoretical masses with experimental masses arecalculated using the proposed compounds, which are assigned to formulas Tn (OH)m, Tn (OMe)y orTn(OH)x(OMe)y[T=RSiO1.5 (x+y)/2n, R=--(CH2)3OOCCH(CH3)CH2 and--CHCH2]. Both theproposed cage and ladder structures of SSO derived from similar sol-gel process of monomers are illustrated. Thecauses for the difference in structures between SSO M and SSO V is discussed as well. 展开更多
关键词 molar mass distribution hydrolytic condensation cage and ladder structure
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Spin Polarizations of Electron with Rashba Couplings in T-Shaped Devices:A Finite Element Approach
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作者 朱松 刘会平 易林 《Communications in Theoretical Physics》 SCIE CAS CSCD 2010年第9期563-572,共10页
A generalized finite element formulation is proposed for the study of the spin-dependent ballistic transport of electron through the two-dimensional quantum structures with Rashba spin-orbit interactions (SOI). The ... A generalized finite element formulation is proposed for the study of the spin-dependent ballistic transport of electron through the two-dimensional quantum structures with Rashba spin-orbit interactions (SOI). The transmission coefficient, conductance, the total and local polarization are numerically calculated and discussed as the Rashba eoefficient, the geometric sizes, and incident energy are changed in the T-shaped devices. Some interesting features are found in the proper parameter regime. The polarization has an enhancement as the Rashba coefficient becomes stronger. The polarization valley is rigid in the regime of the conductance plateaus since the local interference among the polarized multi-wave modes. The Rashba interactions coupling to geometry in sizes could form the structure-induced Fano-Rashba resonance. In the wider stub, the localized spin lattice of electron could be produced. The conductance plateaus correspond to weak polarizations. Strong polarizations appear when the stub sizes, incident energy, and the Rashba coupling coefficient are matched. The resonances are formed in a wide Fermi energy segment easily. 展开更多
关键词 ballistic transport spin polarized transport in semiconductors scattering mechanism spin-orbitcoupling
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Polaronic Effects of an Exciton in a Cylindrical Quantum Wire 被引量:1
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作者 WANGRui-Qiang XIEHong-Jing GUOKang-Xian YUYou-Bin DENGYong-Qing 《Communications in Theoretical Physics》 SCIE CAS CSCD 2005年第1期169-174,共6页
The effects of exciton-optical phonon interaction on the binding energy and the total and reduced effective masses of an exciton in a cylindrical quantum wire have been investigated. We adopt a perturbative-PLL [T.D. ... The effects of exciton-optical phonon interaction on the binding energy and the total and reduced effective masses of an exciton in a cylindrical quantum wire have been investigated. We adopt a perturbative-PLL [T.D. Lee,F. Low, and D. Pines, Phys. Rev. B90 (1953) 297] technique to construct an effective Hamiltonian and then use a variational solution to deal with the exciton-phonon system. The interactions of exciton with the longitudinal-optical phonon and the surface-optical phonon have been taken into consideration. The numerical calculations for GaAs show that the influences of phonon modes on the exciton in a quasi-one-dimensional quantum wire are considerable and should not be neglected. Moreover the numerical results for heavy- and light-hole exciton are obtained, which show that the polaronic effects on two types of excitons are very different but both depend heavily on the sizes of the wire. 展开更多
关键词 exciton binding energy polaronic effect cylindrical quantum wire
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Formation Mechanism and Binding Energy for Equilateral Triangle Structure of Li3 Cluster 被引量:1
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作者 YANG Jian-Hui LI Ping GOU Qing-Quan 《Communications in Theoretical Physics》 SCIE CAS CSCD 2005年第3X期525-528,共4页
The formation mechanism for the equilateral triangle structure of Lia cluster is proposed. The curve of the total energy versus the interatomic distance for this structure has been calculated by using the method of Go... The formation mechanism for the equilateral triangle structure of Lia cluster is proposed. The curve of the total energy versus the interatomic distance for this structure has been calculated by using the method of Gou's Modified Arrangement Channel Quantum Mechanics. The result shows that the curve has a minimal energy of-22.338 60 a.u at R = 5.82 ao. The total energy of Lia when R approaches co has the value of-22.284 09 a.u. This is also the total energy of three lithium atoms dissociated from Lia. The difference value of 0.0545 08 a.u. for the above two energy values is the dissociation energy of Li3 cluster, which is also its binding energy. Therefore the binding energy per lithium atom for Lia is 0.018 169 a.u. = 0.494 eV, which is greater than the binding energy of 0.453 eV per atom for Li2 calculated in a previous work. This means that the Li3 cluster may be formed in the equilateral triangle structure of side length R = 5.82ao stably with a stronger binding from the symmetrical interaction among the three lithium atoms. 展开更多
关键词 Li3 cluster binding energy equilateral triangle structure
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On modal energy in civil structural control
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作者 Miao PANG Tie-jiong LOU Ming ZHAO 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2008年第7期878-887,共10页
A new control strategy based on modal energy criterion is proposed to demonstrate the effectiveness of the control system in reducing structural earthquake responses. The modal control algorithm combining LQR(linear q... A new control strategy based on modal energy criterion is proposed to demonstrate the effectiveness of the control system in reducing structural earthquake responses. The modal control algorithm combining LQR(linear quadratic regulator) control algorithm is adopted in the discrete time-history analysis. The various modal energy forms are derived by definition of the generalized absolute displacement vector. A preliminary numerical study of the effectiveness of this control strategy is carried out on a 20-storey framed steel structural model. The controlled performance of the model is studied from the perspectives of both response and modal energy. Results show that the modal energy-based control strategy is very effective in reducing structural responses as well as in consuming a large amount of modal energy,while augmentation of additional generalized control force corresponding to the modes that contain little modal energy is unnecessary,as it does little help to improve the controlled structural performance. 展开更多
关键词 Modal energy Aseismic control LQR (linear quadratic regulator) control algorithm Modal space Generalized single-degree-of-freedom (SDOF) system
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Novel high magnification zoom laser beam expander 被引量:2
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作者 GAO Hong-yun FU Ru-lian ZHUO Ran-ran 《Optoelectronics Letters》 EI 2006年第6期436-438,共3页
A novel high magnification zoom laser beam expander is proposed originally. The zoom part and fixed part of the beam expander both adopt spherical lens and the compensation part comprising a spherical surface and an a... A novel high magnification zoom laser beam expander is proposed originally. The zoom part and fixed part of the beam expander both adopt spherical lens and the compensation part comprising a spherical surface and an aspherical surface. The structure parameters were given by using geometry optics.The zoom characteristic and image quality were also analyzed.The results show that the magnification of the beam expander can be adjusted continuously from 3 to 20. Compared with other congener spherical zoom system,the beam expander has the advantages of high magnification,compact structure,high beam quality and high transmission efficiency.The novel expander can be used in many fields effectively. 展开更多
关键词 激光束扩展器 透镜 非球面界面 结构
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Document Clustering Based on Constructing Density Tree
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作者 戴维迪 王文俊 +2 位作者 侯越先 王英 张璐 《Transactions of Tianjin University》 EI CAS 2008年第1期21-26,共6页
This paper focuses on document clustering by clustering algorithm based on a DEnsityTree (CABDET) to improve the accuracy of clustering. The CABDET method constructs a density-based treestructure for every potential c... This paper focuses on document clustering by clustering algorithm based on a DEnsityTree (CABDET) to improve the accuracy of clustering. The CABDET method constructs a density-based treestructure for every potential cluster by dynamically adjusting the radius of neighborhood according to local density. It avoids density-based spatial clustering of applications with noise (DBSCAN) ′s global density parameters and reduces input parameters to one. The results of experiment on real document show that CABDET achieves better accuracy of clustering than DBSCAN method. The CABDET algorithm obtains the max F-measure value 0.347 with the root node's radius of neighborhood 0.80, which is higher than 0.332 of DBSCAN with the radius of neighborhood 0.65 and the minimum number of objects 6. 展开更多
关键词 document handling clustering tree structure vector space model
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Review of reflective fiber optic sensors for surface topography measurement
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作者 YANG Rui-feng HU Chen-hao +2 位作者 GUO Chen-xia GAI Ting LANG Guo-wei 《Journal of Measurement Science and Instrumentation》 CAS CSCD 2018年第1期59-67,共9页
Different from the traditional contact surface topography measurement,reflective intensity-modulated fiber optic sensor(RIM-FOS)has the unique advantages of non-contact nondestructive detection.This paper briefly intr... Different from the traditional contact surface topography measurement,reflective intensity-modulated fiber optic sensor(RIM-FOS)has the unique advantages of non-contact nondestructive detection.This paper briefly introduces the principle and performance of RIM-FOS for surface topography measurement and compares with several other methods of topography measurement.Based on the review of its development process,this paper summarizes and analyses the hot issues of RIM-FOS in the surface topography measurement,then predicts the future trend for a guidance of the further study. 展开更多
关键词 reflective intensity-modulated fiber optic sensor(RIM-FOS) topography measurement probe structure interference compensation
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Influence of expanded polystyrene size on deformation characteristics of light weight soil 被引量:13
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作者 侯天顺 《Journal of Central South University》 SCIE EI CAS 2012年第11期3320-3328,共9页
Deformation characteristics of light weight soil with different EPS (expanded polystyrene) sizes were investigated by consolidation tests.The results show that the confined stress-strain relation curve is in S shape,w... Deformation characteristics of light weight soil with different EPS (expanded polystyrene) sizes were investigated by consolidation tests.The results show that the confined stress-strain relation curve is in S shape,which has a good homologous relation with e-p curve and e-lgp curve,and three types of curves reflect obvious structural characteristics of light weight soil.When cement mixed ratio and EPS volume ratio are the same for different specimens,structural strength decreases with the increase of EPS size,but compressibility indexes basically keep unchanged within the structural strength.The settlement of light weight soil can be divided into instantaneous settlement and primary consolidation settlement.It has no obvious rheology property,and 90% of total consolidation deformation can be finished in 1 min.Settlement-time relation of light weight soil can be predicted by the hyperbolic model.S-lgt curve of light weight soil is not in anti-S shape.It is proved that there is no secondary consolidation section,so consolidation coefficient cannot be obtained by time logarithm method.Structural strength and unit price decrease with the increase of EPS size,but the reducing rate of the structural strength is lower than that of the unit price,so the cost of mixed soil can be reduced by increasing the EPS size.The EPS beads with 3-5 mm in diameter are suggested to be used in the construction process,and the prescription of mixed soil can be optimized. 展开更多
关键词 light weight soil expanded polystyrene (EPS) size effect one-dimensional consolidation theory compressibility index structural strength consolidation test
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Novel Localized Excitations of Nonlinear Coupled Scalar Fields
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作者 LI Jin-Hua WU Huang-Jiao 《Communications in Theoretical Physics》 SCIE CAS CSCD 2008年第6期1365-1372,共8页
Some extended solution mapping relations of the nonlinear coupled scalar field and the well-known φ^4 model are presented. Simultaneously, inspired by the new solutions of the famous φ^4 model recently proposed by J... Some extended solution mapping relations of the nonlinear coupled scalar field and the well-known φ^4 model are presented. Simultaneously, inspired by the new solutions of the famous φ^4 model recently proposed by Jia, Huang and Lou, five kinds of new localized excitations of the nonlinear coupled scaiar field (NCSF) system are obtained. 展开更多
关键词 nonlinear coupled scalar field solitary wave structure mapping and deformation approach
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Complete Kaehler Submanifolds in CP^n
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作者 SONGXiao-xin HUCong-e 《Chinese Quarterly Journal of Mathematics》 CSCD 北大核心 2005年第2期214-220,共7页
In this paper we mainly investigate projectively flat complete Kaehler submanifolds, in CP^n. We give the pinching constants and the local structure.
关键词 Kaehler Submanifolds COMPLETE scalar curvature
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The Use of MCRD Technique in Mode Shapes Extraction
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作者 Ahmed. A. Elshafey Mahmoud R. Haddara H. Marzouk 《Journal of Civil Engineering and Architecture》 2010年第7期26-33,共8页
The random decrement technique is an averaging technique that can be used to extract the free decay response of the structure from its random stationary vibratory response. The free decay response can then be used to ... The random decrement technique is an averaging technique that can be used to extract the free decay response of the structure from its random stationary vibratory response. The free decay response can then be used to identify the vibratory characteristics of the structure. The main advantage of the technique is that the identification of the parameters of the structure is achieved without previous knowledge of the excitation forces. This paper extends the random decrement technique to obtain the mode shapes of the structure using the concept of a multichannel random decrement technique (MCRD). This technique is based on extracting simultaneous random decrement records from measurements made at several points on the structure. The method is very efficient and simple. Numerical examples are solved and compared with the exact mode shapes extracted using classical modal analysis. An excellent agreement between the extracted modes shapes using the MCRD and those obtained from the classical modal analysis techniques is achieved. The vibration of an offshore structure excited by white noise excitation is used to illustrate the method. 展开更多
关键词 Mode shapes multichannel random decrement free decay
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Nutritional Aspects of Two Widely Consumed Wild Edible Mushrooms in Jordan
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作者 Ahmad Mohamad Almomany 《Journal of Life Sciences》 2013年第6期653-657,共5页
Two wild mushrooms frequently consumed in Jordan were collected form Jordan forests in spring 2012. Each sample was studied in the lab by taking measurements on the morphological structures of the cap, stem, and recor... Two wild mushrooms frequently consumed in Jordan were collected form Jordan forests in spring 2012. Each sample was studied in the lab by taking measurements on the morphological structures of the cap, stem, and recording gill's color, shape and dimensions. Also smell and taste for each fruiting structure were taken in consideration. Spore print for each sample was also defined. Spores of each mushroom were microscopically tested and measured. These mushrooms were identified as Pleurotus eryngi and Tricholoma terreum. The two mushrooms were evaluated for their physical properties, chemical and mineral composition. Contents of Ca, Na, K, Zn, Mn, Cu, Fe and Mg were determined. For each mushroom species two mixed samples were analyzed. Nitrogen content was detected with Kjeldahl method and protein content (%) was calculated by multiplying nitrogen content with the factor 4.38. The highest protein content calculated on oven dry weight basis was found in Pleurotus eryngi which was around 30.6%, while Tricholoma terreum contained lowest protein content (17.4%). Pleurotus eryngi accumulated trace elements at high ratios as for P, Ca and Na 0.99%, 0.65% and 0.57% respectively while Tricholoma terreum contained more K (5.1%) than the other wild mushroom. Total soluble carbohydrates (50.8%), crude fiber (13.4%) and ash (12.2%) percentages were higher in Tricholoma terreum than in Pleurotus eryngi. 展开更多
关键词 MUSHROOM PLEUROTUS TRICHOLOMA protein fat ash minerals.
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Effect of Forging Ratio on Microstructure of the of the 1.5710 Grade Steel
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作者 Greger Miroslav Michal Madaj +1 位作者 Petrzela Jiri Laszlo Vladimir 《Journal of Mechanics Engineering and Automation》 2015年第8期454-458,共5页
Intensity of structural changes during forging is usually determined in dependence on the forging ratio. Forging ratio at elongation is most often calculated with use of simple relations, which are based on the change... Intensity of structural changes during forging is usually determined in dependence on the forging ratio. Forging ratio at elongation is most often calculated with use of simple relations, which are based on the change of cross section of the forged pieces. The intensity of structure development is influenced not only by the simple change of cross sections, but also by relative length of the stroke, magnitude of deformation in individual passes, manner of edging, temperature, friction and shape of anvils. The paper gives an analysis of influence of the relative length of the stroke on the forging ratio. 展开更多
关键词 FORGING relative length of the stroke forging ratio.
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Formation of Polyethersulfone Film with Regular Microporous Structure by Water Vapor Induced Phase Separation
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作者 刘文芳 赵之平 +1 位作者 孙蕾 王明振 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2010年第3期529-532,共4页
Polyethersulfone(PES)film with regular microporous structure was formed using dichloromethane as the solvent via water vapor induced phase separation(VIPS).The effects of solution concentration,atmospheric humidity an... Polyethersulfone(PES)film with regular microporous structure was formed using dichloromethane as the solvent via water vapor induced phase separation(VIPS).The effects of solution concentration,atmospheric humidity and temperature,as well as molecular weight of PES on the surface morphology of the polymer film were investigated.The surface morphology characterized by SEM showed that the pore size reduced as the solution concentration increased.There was an optimum range of relative humidity for the formation of regular pore structure, which was from 60%to 90%at concentration of 20 g·L-1 and 20°C.With the atmospheric temperature varied from 20 to 30°C,the pore became larger and the space between pores increased.The pore size in the PES film with low molecular weight was smaller than that with high molecular weight. 展开更多
关键词 POLYETHERSULFONE microporous film FORMATION water vapor induced phase separation
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On the Geometry of the(1,1)-Tensor Bundle with Sasaki Type Metric 被引量:3
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作者 Arif SALIMOV Aydin GEZER 《Chinese Annals of Mathematics,Series B》 SCIE CSCD 2011年第3期369-386,共18页
Curvature properties are studied for the Sasaki metric on the (1, 1) tensor bundle of a Riemannian manifold. As an application, examples of almost para-Nordenian and para-Kahler-Nordenian B-metrics are constructed o... Curvature properties are studied for the Sasaki metric on the (1, 1) tensor bundle of a Riemannian manifold. As an application, examples of almost para-Nordenian and para-Kahler-Nordenian B-metrics are constructed on the (1, 1) tensor bundle by looking at the Sasaki metric. Also, with respect to the para-Nordenian B-structure, paraholomorphic conditions for the complete lifts of vector fields are analyzed. 展开更多
关键词 Tensor bundle Sasaki metric Vertical and horizontal lift B-manifold
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