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Search Results: 1 - 10 of 26950 matches for " GAO Ke "
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Global Convergence of a Modified Tri-Dimensional Filter Method  [PDF]
Bei Gao, Ke Su, Zixing Rong
Applied Mathematics (AM) , 2015, DOI: 10.4236/am.2015.62023
Abstract: In this paper, a tri-dimensional filter method for nonlinear programming was proposed. We add a parameter into the traditional filter for relaxing the criterion of iterates. The global convergent properties of the proposed algorithm are proved under some appropriate conditions.
Two quantum oscillators coupled with a planar radio frequency ion trap

Chen Liang,Gao Ke-Lin,

中国物理 B , 2010,
Abstract: In this scheme, two quantum oscillators in a planar radio frequency ion trap are coupled by the trap electrodes. The ions motional states encode the quantum bits (qubits), and a swap gate could be achieved. Under different conditions of the experiments, the intensity of the coupling between two quantum oscillators and the dissipation of the system are calculated. We compute fidelities for a quantum swap gate and discuss experimental issues.
Empirical Analysis of Customer Behaviors in Chinese E-Commerce
Jinlong Wang,Ke Gao,Gang Li
Journal of Networks , 2010, DOI: 10.4304/jnw.5.10.1177-1184
Abstract: With the burgeoning e-Business websites, E-Commerce in China has been developing rapidly in recent years. From the analysis of Chinese E-Commerce market, it is possible to discover customer purchasing patterns or behavior characteristics, which are indispensable knowledge for the expansion of Chinese E-Commerce market. This paper presents an empirical analysis on the sale transactions from the 360buy website based on the analysis of time interval distributions in perspectives of customers. Results reveal that in most situations the time intervals approximately obey the power-law distribution over two orders of magnitudes. Additionally, time interval on customer’s successive purchase can reflect how loyal a customer is to a specific product category. Moreover, we also find an interesting phenomenon about human behaviors that could be related to psychology of customers. In general, customers’ requirements in different product categories are similar. The investigation into individual behaviors may help researchers understand how customers’ group behaviors generated.
Phase Transitions in Knowledge Compilation: an Experimental Study
Jian Gao,Minghao Yin,Ke Xu
Computer Science , 2011,
Abstract: Phase transitions in many complex combinational problems have been widely studied in the past decade. In this paper, we investigate phase transitions in the knowledge compilation empirically, where DFA, OBDD and d-DNNF are chosen as the target languages to compile random k-SAT instances. We perform intensive experiments to analyze the sizes of compilation results and draw the following conclusions: there exists an easy-hard-easy pattern in compilations; the peak point of sizes in the pattern is only related to the ratio of the number of clauses to that of variables when k is fixed, regardless of target languages; most sizes of compilation results increase exponentially with the number of variables growing, but there also exists a phase transition that separates a polynomial-increment region from the exponential-increment region; Moreover, we explain why the phase transition in compilations occurs by analyzing microstructures of DFAs, and conclude that a kind of solution interchangeability with more than 2 variables has a sharp transition near the peak point of the easy-hard-easy pattern, and thus it has a great impact on sizes of DFAs.
A novel weighting scheme for random $k$-SAT
Zongsheng Gao,Jun Liu,Ke Xu
Computer Science , 2013,
Abstract: Consider a random $k$-CNF formula $F_{k}(n, rn)$ with $n$ variables and $rn$ clauses. For every truth assignment $\sigma\in \{0, 1\}^{n}$ and every clause $c=\ell_{1}\vee\cdots\vee\ell_{k}$, let $d=d(\sigma, c)$ be the number of satisfied literal occurrences in $c$ under $\sigma$. For fixed $\beta>-1$ and $\lambda>0$, we take $\omega(\sigma, c)=0$, if $d=0$; $\omega(\sigma, c)=\lambda(1+\beta)$, if $d=1$ and $\omega(\sigma, c)=\lambda^{d}$, if $d>1$. Applying the above weighting scheme, we get that if $F_{k}(n, rn)$ is unsatisfiable with probability tending to one as $n\rightarrow\infty$, then $r\geq2.83, 8.09, 18.91, 40.81, 84.87$ for $k=3, 4, 5, 6$ and $7,$ respectively.
Advanced biorefinery in lower termite-effect of combined pretreatment during the chewing process
Jing Ke, Dhrubojyoti D Laskar, Difeng Gao, Shulin Chen
Biotechnology for Biofuels , 2012, DOI: 10.1186/1754-6834-5-11
Abstract: We discovered a combination of specific structural and compositional modification of the lignin framework and partial degradation of carbohydrates that occurs in softwood with physical chewing by the termite, Coptotermes formosanus, which are critical for efficient cell wall digestion. Comparative studies on the termite-chewed and native (control) softwood tissues at the same size were conducted with the aid of advanced analytical techniques such as pyrolysis gas chromatography mass spectrometry, attenuated total reflectance Fourier transform infrared spectroscopy and thermogravimetry. The results strongly suggest a significant increase in the softwood cellulose enzymatic digestibility after termite chewing, accompanied with utilization of holocellulosic counterparts and an increase in the hydrolysable capacity of lignin collectively. In other words, the termite mechanical chewing process combines with specific biological pretreatment on the lignin counterpart in the plant cell wall, resulting in increased enzymatic cellulose digestibility in vitro. The specific lignin unlocking mechanism at this chewing stage comprises mainly of the cleavage of specific bonds from the lignin network and the modification and redistribution of functional groups in the resulting chewed plant tissue, which better expose the carbohydrate within the plant cell wall. Moreover, cleavage of the bond between the holocellulosic network and lignin molecule during the chewing process results in much better exposure of the biomass carbohydrate.Collectively, these data indicate the participation of lignin-related enzyme(s) or polypeptide(s) and/or esterase(s), along with involvement of cellulases and hemicellulases in the chewing process of C. formosanus, resulting in an efficient pretreatment of biomass through a combination of mechanical and enzymatic processes. This pretreatment could be mimicked for industrial biomass conversion.Transformational scientific knowledge on bioprocessing is requir
Generation and classification of robust remote symmetric Dicke states

Zhu Yan-Wu,Gao Ke-Lin,

中国物理 B , 2008,
Abstract: In this paper, we present an approach to generating arbitrary symmetric Dicke states with distant trapped ions and linear optics. Distant trapped ions can be prepared in the symmetric Dicke states by using two photon-number-resolving detectors and a polarization beam splitter. The atomic symmetric Dicke states are robust against decoherence, for atoms are in a metastable level. We discuss the experimental feasibility of our scheme with current technology. Finally, we discuss the classification of arbitrary $n$-qubit symmetric Dicke states under statistical local operation and classical communication and prove the existence of $n/2]$ inequivalent classes of genuine entanglement of $n$-qubit symmetric Dicke states.
Complex network analysis in inclined oil--water two-phase flow

Gao Zhong-Ke,Jin Ning-De,

中国物理 B , 2009,
Abstract: Complex networks have established themselves in recent years as being particularly suitable and flexible for representing and modelling many complex natural and artificial systems. Oil--water two-phase flow is one of the most complex systems. In this paper, we use complex networks to study the inclined oil--water two-phase flow. Two different complex network construction methods are proposed to build two types of networks, i.e. the flow pattern complex network (FPCN) and fluid dynamic complex network (FDCN). Through detecting the community structure of FPCN by the community-detection algorithm based on K-means clustering, useful and interesting results are found which can be used for identifying three inclined oil--water flow patterns. To investigate the dynamic characteristics of the inclined oil--water two-phase flow, we construct 48 FDCNs under different flow conditions, and find that the power-law exponent and the network information entropy, which are sensitive to the flow pattern transition, can both characterize the nonlinear dynamics of the inclined oil--water two-phase flow. In this paper, from a new perspective, we not only introduce a complex network theory into the study of the oil--water two-phase flow but also indicate that the complex network may be a powerful tool for exploring nonlinear time series in practice.
Effect of chlorine content of chlorophenols on their adsorption by mesoporous SBA-15

Qingdong Qin,Ke Liu,Dafang Fu,Haiying Gao,

环境科学学报(英文版) , 2012,
Abstract:
Land Policy and Systematic Transformation in Chinese Rural Areas (1950—1978)
Rong TAN,Hua-ke GAO,Jie CUI
Cross-Cultural Communication , 2005, DOI: 10.3968/1706
Abstract: Based on historical review of the Chinese rural land policy from 1950 to 1978, we looked back the devious journey undergone in Chinese rural areas during this period. At first, the landlord’s ownership was transferred into the peasant’s ownership; and then private ownership was transferred into public ownership. The radical transformation of property right and process of agricultural cooperation went against the economic law and the wills of the mass peasants, which led to laggard rural productive forces and long-term low peasants’ income level. During the policy transformation process, political and ideological factors played the predominant role, which led to harmful results. The experiences in this period demonstrated that the economic developmental model and systematic arrangement in Chinese rural areas should satisfy the peasants’ free wills and protect the peasants’ essential interests. Only in this way could the Chinese rural economy gain fast development. Key Words: Chinese Rural Areas, Land Policy, System Arrangement, Ideology, Interests. Abstrait: Basés sur une révision historique de la politique de terre dans les régions rurales de Chine de 1950 à 1978, nous avons mené un examen rétrospectif sur le parcours détourné qu’avaient traversé ces régions pendant cette période. Au début, les terres des propriétaires fonciers avaient été transférées comme propriétés des paysans ; et puis, les propriétés privées avaient été transféré comme propriétés publiques. La transformation radicale du droit de propriété et le processus de la coopération agricole après la réforme de terre allaient à l’encontre de la loi économique et de la volonté des paysans, ce qui avait conduit à un retard des forces productives dans les régions rurales et à un niveau de revenu très inférieur pour les paysans chinois. Dans ce processus de transformation de politiques, les facteurs politiques et idéologiques avaient joué un r le prédominant, d’où des résultats défavorables. Les expériences que nous avons tirées pendant cette période montrent bien que le modèle du développement économique et l’arrangement systématique dans les régions rurales de Chine doivent satisfaire la volonté des paysans et protéger leurs intérêts fondamentaux. C’est aussi le seul moyen qui permette aux régions rurales de Chine de réaliser un développement rapide. Mots Clés: Régions Rurales de Chine, Politique de Terre, Transformation Systématique, Idéologie, Intérêts. 摘要:本文通過對中國農村 1950年到 1978年土地政策的歷史追溯,研究這一時期中國農村走過的曲折路程。這一時期中國農村由土地地主所有變為農民所有,繼而由產權私有轉變為產權公有。產權的根本性變更和農業合作化的過程,違背了經濟規律和廣大農民的意願,導致中國農村生產力水準和農民收入水
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