排序方式: 共有200条查询结果,搜索用时 343 毫秒
91.
Turbo-coded 1.25-Gb/s orthogonal frequency-division multiplexing (OFDM) signals in 60-GHz radio-over-fiber system are demonstrated.It can overcome impairments in fibers and extend transmission distance.Experimental results show that the transmission distance of turbo-coded OFDM signals at 1.25 Gb/s with coding (pure bit rate of 830 Mb/s) can be extended by over 30%. 相似文献
92.
XIE SuXia LI HongJian XU HaiQing ZHOU Xin FU ShaoLi & WU JinJun College of Physics Science Technology Central South University Changsha China College of Materials Science Engineering 《中国科学:物理学 力学 天文学(英文版)》2010,(3)
This paper has made a theoretical study of enhanced transmission through a gold grating with arrays of subwavelength slits filled with nonlinear Kerr medium. The results of the research are based on rigorous finite-difference time domain calculations. The resonance transmission peaks in the investigated wavelength range are produced as a result of the surface plasmon resonance collaborated with the localized waveguide resonance. The paper also gives a detailed analysis of the influence exerted by various fa... 相似文献
93.
Jing Xiao Zhiguo Luo Dept. of Math. Hunan Normal University Changsha 《Annals of Differential Equations》2010,(1):70-76
In this paper, we study the existence of solutions to a three-point boundary value problem with nonlinear growth. Sufficient conditions for the existence of solutions to the system in the resonance and non-resonance cases are established by employing Leray-Schauder continuation theorem and the coincidence degree theory. 相似文献
94.
Liang Ximing Li Fei Xu Chengxian College of Information Science Engineering Central South Univ. Changsha . School of Science Xi''''an Jiaotong Univ. Xi''''an . 《高校应用数学学报(英文版)》2000,(4)
§ 1 IntroductionThe problem of finding a point x* ∈S such that〈F(x* ) ,x -x* 〉≥ 0 for all x∈ S,(VIP)where S is a nonempty closed convex subset of Rn,F is a mapping from Rninto itself,and〈.,.〉denotes the inner productin Rn,is called the variational inequality problem and hasbeen widely used to study various equilibrium models arising in economic,operations re-search,transportation and regional sciences[1 ,2 ] .Many iterative methods for (VIP) havebeen developed,for example,project… 相似文献
95.
SHI Hui HE XiaoXiao YANG XiaoHai WANG KeMin WANG Qing GUO QiuPing & HUO XiQin State Key Laboratory of Chemo/Biosensing Chemometrics College of Chemistry Chemical Engineering Biomedical Engineering Center Hunan University Key Laboratory for Bio-Nanotechnology Molecule Engineering of Hunan Province Changsha China 《中国科学:化学》2010,(4)
With the completion of the human genome-sequencing project, there has been a resulting change in the focus of studies from genomics to proteomics. By utilizing the inherent advantages of molecular beacon probes and biofunctionalized nanoparticles, a series of novel principles, methods and techniques have been exploited for bioanalytical and biomedical studies. This review mainly discusses the applications of molecular beacon probes and biofunctionalized nanoparticles-based technologies for realtime, in-situ... 相似文献
96.
Yun Hui YANG Ming Hui YANG Jian Hui JIANG Guo Li SHEN? Ru Qin YU State Key Laboratory for Chemo/Biosensing Chemometrics College of Chemistry Chemical Engineering Hunan University Changsha College of Chemistry Chemical Engineering Yunnan Normal University Kunming 《中国化学快报》2005,16(7):951-954
The performance of an enzyme electrode often depends on the method of enzyme immobilization when fabricating biosensors1. Therefore, the technique used to immobilize the enzyme is one of the key factors in developing a reliable biosensor. Organic-inorganic composite (or hybrid) materials have emerged in recent years. It combines the physicochemical attributes of components and improves their features. Organic components benefit the formation of defect-free inorganic membranes and make it less … 相似文献
97.
A new polyaluminosilazane precursor was prepared by polymerizing hexamethylcydotrisilazane (HMCTS) with aluminum acetylacetonate and the structure of the precursor was characterized by FF-IR and XPS analysis. Result shows that aluminum was incorporated mainly in form of Al--N bond. Oxygen was also detected and found that it was mainly bonded to silicon. 相似文献
98.
火焰原子吸收法连续测定氧化锑中铅、铜、铁含量 总被引:1,自引:0,他引:1
确立了火焰原子吸收测定氧化锑中铅、铜、铁含量的方法,探讨了样品的前处理、酸度、及共存元素的干扰情况,确定了各元素测定的最佳条件,回收率在95.4%-112.1%之间,精密度RSD%不大于5.9%,该方法能满足氧化锑中铅、铜、铁元素的测定。 相似文献
99.
由主子阵和特殊次序缺损特征对构造Jacobi矩阵 总被引:2,自引:0,他引:2
In this paper,an inverse eigenvalue problem of constructing a Jacobian matrix from its prescribed specially ordered defective eigenpairs and a principal subma-trix is considered.The necessary and sufficient conditions for the existence and uniqueness of the solution are derived.Two numerical algorithms and two numer-ical examples are given. 相似文献
100.
ZHANG Xuejun~ & XIAO Jianbin~ . College of Mathematics Computer Science Hunan Normal University Changsha China 《中国科学A辑(英文版)》2005,(10)
In this paper,necessary and sufficient conditions are given for the weighted composition operator T_(ψ,ψ) to be bounded or compact from the space β_μto β_ν(or β_(μ,0) to β_(ν,0) ) on the unit ball of C~n.At the same time,a series of corollaries are also obtained. 相似文献