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Search Results: 1 - 10 of 59569 matches for " Lu Ling-yun "
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catena-Poly[[diaquazinc(II)]-μ3-2,2′-dihydroxy-1,1′-binaphthyl-3,3′-dicarboxylato-κ3O:O′:O′′]
Ling-Yun Zhang
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536809051836
Abstract: In the title coordination complex, [Zn(C22H12O6)(H2O)2]n or [Zn(H2nba)(H2O)2]n (H2nba is 2,2′-dihydroxy-1,1′-binaphthyl-3,3′-dicarboxylate), the ZnII atom is coordinated by three H2nba ligands and two water molecules, resulting in a distorted trigonal-bipyramidal geometry. In the crystal structure, adjacent ZnII atoms are linked by two H2nba ligands, forming one-dimensional ribbons along the c axis. These ribbons are further assembled into layers parallel to the bc plane via O—H...O hydrogen bonds.
Chaotic Structures in Brent & WTI Crude Oil Markets: Empirical Evidence
Ling-Yun HE
International Journal of Economics and Finance , 2011, DOI: 10.5539/ijef.v3n5p242
Abstract: This article provided empirical evidence of existence of chaotic structures in the time series of Brent and WTI crude oil price returns, by means of the Phase Space Reconstruction Technique (PSRT) and fractal integral method. This paper analyzed the time series of oil prices, attained the fractal dimensions, positive Lyapunov exponents and Kolmogorov entropy, and thereby identified the existence of chaos in the markets. Our results can deepen the understanding of crude oil dynamics and the complexity of the analyzed markets.
Three-gluon correlator contribution to Sivers asymmetry in SIDIS
Ling-Yun Dai
Physics , 2015,
Abstract: We study the Sivers asymmetry in semi-inclusive deep inelastic scattering: the three-gluon correlation function contribution. At the cross section level, we establish the matching between the twist-3 collinear factorization approach and the transverse momentum dependent factorization formalism at the moderate transverse momentum region. The so-called coefficient functions when one expands the quark Sivers function in terms of three-gluon correlation functions are derived, which are essential components in the usual transverse momentum dependent evolution formalism. Finally we calculate the transverse-momentum-weighted spin-dependent differential cross section at the next-to-leading order, from which we identify the off-diagonal/three-gluon correlation contribution to the QCD collinear evolution of the twist-3 Qiu-Sterman function.
Roles of Pro- and Anti-Inflammatory Cytokines in the Pathogenesis of SLE
Ding-Lei Su,Zhi-Min Lu,Min-Ning Shen,Xia Li,Ling-Yun Sun
Journal of Biomedicine and Biotechnology , 2012, DOI: 10.1155/2012/347141
Abstract: SLE is an autoimmune inflammatory disease in which various pro- and anti-inflammatory cytokines, including TGF-β, IL-10, BAFF, IL-6, IFN-α, IFN-γ, IL-17, and IL-23, play crucial pathogenic roles. Virtually, all these cytokines can be generated by both innate and adaptive immune cells and exert different effects depending on specific local microenvironment. They can also interact with each other, forming a complex network to maintain delicate immune homeostasis. In this paper, we elaborate on the abnormal secretion and functions of these cytokines in SLE, analyze their potential pathogenic roles, and probe into the possibility of them being utilized as targets for therapy.
Pricing European options under stochastic interest rate
随机利率条件下的欧式期权定价

ZHOU Hai-lin,WU Xin-yu,GAO Ling-yun,LU Feng-bin,
周海林
,吴鑫育,高凌云,陆凤彬

系统工程理论与实践 , 2011,
Abstract: With the assumption that the underlying asset price and interest rate follow diffusion process, the structure of the price of European option is obtained by choosing the underlying asset price and zero coupon price as numeraires respectively.A sufficient condition that the volatility processes of interest rate and the price of underlying asset are deterministic function of time is also derived,under which the price of European option has a close-formed structure.A case of European option pricing is presente...
The Performance of CDMA Systems withSpace-Time Spreading Approach underthe Conditions of Multi-users and Multipaths
采用空时扩谱技术的CDMA系统在多用户多径条件下的性能

Xiao Yang,Wang Ya-chen,Hu Shao-hai,Lu Ling-yun,
肖扬
,王亚琛,胡绍海,鲁凌云

电子与信息学报 , 2004,
Abstract: The paper studies the performance of CDMA systems with the space-time approach under the conditions of multi-users and multipaths. The space-time spreading scheme with a novel algorithm can improve the downlink performance by using two antenna elements at the base station and one antenna at the mobile terminal. Different from the present other results, the multi-user systems have been analyzed, the detailed theory analysis and expression of bit-error-probability have been provided, based on the scheme of single-user systems. Moreover, the simulation results show that this scheme obtains an improvement of the CDMA system performance comparing to the conventional approaches, demonstrating that it is a practical way to decrease the bit error rate and improve the quality of the downlink of CDMA systems. Meantime, the implementation complexity of the systems has increased, there are many new technical requirements for mobiles to be satisfied, and the STS technique needs to be improved.
Design and Implementation of Network Model Based on Multiplexing of TCP
基于TCP的多路复用网络模型的设计和实现

DOU Ling-yun,LU Xian-liang,DUAN Han-cong,
窦凌云
,卢显良,段翰聪

计算机应用研究 , 2006,
Abstract: According to real environment, the limitation of TCP used in the situation of one connection for one request is analyzed and a network model based on the technology of multiplexing is proposed and the special protocol of this network model is specified. In this paper, through discussion of the whole design of this network model, the concepts of Tunnel and Channel are introduced, the process to communicate with each other is offered and the traffic control using sliding windows algorithm is analyzed.
Two photon couplings of the lightest isoscalars from BELLE data
Ling-Yun Dai,M. R. Pennington
Physics , 2014, DOI: 10.1016/j.physletb.2014.07.005
Abstract: Amplitude Analysis of two photon production of $\pi\pi$ and ${\overline K}K$, using S-matrix constraints and fitting all available data, including the latest precision results from Belle, yields a single partial wave solution up to 1.4 GeV. The two photon couplings of the $\sigma/f_0(500)$, $f_0(980)$ and $f_2(1270)$ are determined from the residues of the resonance poles.
Comprehensive Amplitude Analysis of $γγ\rightarrow π^+π^-, π^0π^0$ and $\overline{K} K$ below 1.5 GeV
Ling-Yun Dai,Michael R. Pennington
Physics , 2014, DOI: 10.1103/PhysRevD.90.036004
Abstract: In this paper we perform an amplitude analysis of essentially all published pion and kaon pair production data from two photon collisions below 1.5 GeV. This includes all the high statistics results from Belle, as well as older data from Mark II at SLAC, CELLO at DESY, Crystal Ball at SLAC. The purpose of this analysis is to provide as close to a model-independent determination of the $\gamma\gamma$ to meson pair amplitudes as possible. Having data with limited angular coverage, typically $|\cos \theta| < 0.6-0.8$, and no polarization information for reactions in which spin is an essential complication, the determination of the underlying amplitudes might appear an intractable problem. However, imposing the basic constraints required by analyticity, unitarity, and crossing-symmetry makes up for the experimentally missing information. Final state interactions among the meson pairs are critical to this analysis. To fix these, we include the latest $\pi\pi\to\pi\pi$, ${\overline K}K$ scattering amplitudes given by dispersive analyses, supplemented in the ${\overline K}K$ threshold region by the recent precision Dalitz plot analysis from BaBar. With these hadronic amplitudes built into unitarity, we can constrain the overall description of $\gamma\gamma\to\pi\pi$ and $\overline{K}K$ datasets, both integrated and differential cross-sections, including the high statistics charged and neutral pion, as well as $K_sK_s$ data from Belle. Since this analysis invokes coupled hadronic channels, having data on both $\gamma\gamma\to\pi\pi$ and $\overline{K}K$ reduces the solution space to essentially a single form. We present the partial wave amplitudes, show how well they fit all the available data, and give the two photon couplings of scalar and tensor resonances that appear. These partial waves are important inputs into forthcoming dispersive calculations of hadronic light-by-light scattering.
Oil price shocks, road transport pollution emissions and residents' health losses in China
Sheng Yang,Ling-Yun He
Quantitative Finance , 2015, DOI: 10.1016/j.trd.2015.10.019
Abstract: China's rapid economic growth resulted in serious air pollution, which caused substantial losses to economic development and residents' health. In particular, the road transport sector has been blamed to be one of the major emitters. During the past decades, fluctuation in the international oil prices has imposed significant impacts on the China's road transport sector. Therefore, we propose an assumption that China's provincial economies are independent "economic entities". Based on this assumption, we investigate the China's road transport fuel (i.e., gasoline and diesel) demand system by using the panel data of all 31 Chinese provinces except Hong Kong, Macau and Taiwan. To connect the fuel demand system and the air pollution emissions, we propose the concept of pollution emissions elasticities to estimate the air pollution emissions from the road transport sector, and residents' health losses by a simplified approach consisting of air pollution concentrations and health loss assessment models under different scenarios based on real-world oil price fluctuations. Our framework, to the best of our knowledge, is the first attempt to address the transmission mechanism between the fuel demand system in road transport sector and residents' health losses in the transitional China.
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