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Search Results: 1 - 10 of 26016 matches for " CAO Bin "
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Complex oscillation of entire solutions of higher-order linear differential equations
Ting-Bin Cao
Electronic Journal of Differential Equations , 2006,
Abstract: In this paper, we investigate higher-order linear differential equations with entire coefficients of iterated order. We improve and extend a result of Belaidi and Hamouda by using the estimates for the logarithmic derivative of a transcendental meromorphic function due to Gundersen and the Winman-Valiron theory. We also consider the nonhomogeneous linear differential equations by using the basic method and some lemmas from the present and other three authors.
Virtual Home Library System—— Let every Chinese family having their own libraries  [PDF]
Bin WU, Shu SONG, Jianxiang CAO, Wen RU
Intelligent Information Management (IIM) , 2009, DOI: 10.4236/iim.2009.11009
Abstract: Virtual Home Library (VHL) is an integrated IT system that utilizes virtual reality technology and an IPTV set-top box (STB) to virtually construct a ‘library’ and the relevant reading environment on televisions in people’s home. Unlike the online e-book reading applications, Virtual Home Library can be applied on televisions – the world’s most convenient and most efficient communication tool. Providing extended digital library services, it will be a perfect group reading utility for family readers. The system has been investigated by a joint research team formed by the National Library of China and the Communication University of China, collaborating with a Chinese IPTV equipment manufacturer. This paper presents some preliminary investigations of the VHL system performed by the research team.
Study on the Surface Acoustic Wave Sensor with Self-Assembly Imprinted Film of Calixarene Derivatives to Detect Organophosphorus Compounds  [PDF]
Bing-Qing Cao, Qi-Bin Huang, Yong Pan
American Journal of Analytical Chemistry (AJAC) , 2012, DOI: 10.4236/ajac.2012.39087
Abstract: The molecularly imprinted technology and the self-assembly technique were used together on the calixarene surface acoustic wave (SAW) chemical sensors to detect organophosphorus compounds. 25-(thioalkyl-alkoxy)-p-tertbutylcalix[4] arene with self-assembled monolayer character was the sensitive coating of the sensors. The sensors had a special response to organophosphorus compounds and the response frequency shift of this sensor to organophosphorus compounds in 0.1 mg/m3 was 350 Hz. The response frequency increased linearly with the increase of the concentration of DMMP in the range from 0.1 to 0.6 mg/m3. The possible explanation of the interaction between the coatings and organophosphorus compounds was discussed.
Study on the Critic Ablation Property of 2D Carbon Reinforced Silicon Carbide (C/SiC) Laminated Composites via CVI Process  [PDF]
Changwan Min, Li Jing, Bin Fu, Geliang Sun, Zhanwei Cao
Journal of Materials Science and Chemical Engineering (MSCE) , 2017, DOI: 10.4236/msce.2017.51011
Abstract:
Two dimensions (2D) C/SiC laminated composites is the material with isotropic properties in laminated sheets, which is considered as a promising thermal skin for aircrafts. There are intense thermal flux and thermal impact at the local interference region during the flight of the aircrafts. Therefore, mastering ablation and mechanical properties of 2D C/SiC laminated composite under extreme environments become the guild lines for the designs of the flight corridor and the aircraft security. This paper presents the experimental results of the ablation and thermal impact of C/SiC composites under different thermal environments (thermal flux ~5 MW/m2), which were carried out with the equipments of free-jets and conduct pipes. The effects on the ablation and mechanical properties of the C/SiC composites are studied, including gas pressure, thermal temperature, and the rates of temperature increasing and decreasing. The results show that the active oxidation and ablation behaviors of 2D C/SiC laminated composites under the thermal flux 5 MW/m2 consist with that of theoretical simulations. The critical failure conditions of 2D C/SiC laminated composite is also provided for the enveloping designs of the whole composites lightweight aircrafts.
Challenges and Methods to Improve Well Cementing Quality for 177.8 mm Liner in Gaoshiti-Moxi Area  [PDF]
Bin Li, Jianhua Guo, Quan Cao, Chi Chen, Lin Hu
Journal of Power and Energy Engineering (JPEE) , 2018, DOI: 10.4236/jpee.2018.69001
Abstract:
Gaoshiti-Moxi structure belt of An-Yue Sinian gas reservoir, which was China’s largest monomer Marine carbonate gas reservoir up to now, located in vying-dragon female temple structure group that belong to the ancient uplift slope of the middle of Sichuan. With the exploration and development of high temperature and high pressure carbonate reservoir, a large number of challenges and problems, such as long isolation section, active oil-gas show, large temperature difference, prone to super retarding cement slurry and gas channeling at flare position, have been encountered in the cementing of 177.8 mm hang-liner. In order to solve these problems, numerous measures and methods have been put into use for reducing the safety risk of cementing and improving cementing quality. The large temperature difference channeling cement slurry system, effective anti-pollution spacer and high-pressure packer type liner hanger were developed and applied for field tests in the early stage of development. In addition, equilibrium pressure cementing technology, optimizing of centralizer placement and plasma column structure, improvement of pump displacement and hold pressure while waiting on cement were used to ensure nice displacement efficiency and cementing quality. As Moxi X well for example, the cementing quality factor of merit was 40.29% and the qualification rate was up to 78.87% after adopting the cementing measures and methods above. The cementing quality was much higher than previous level and provided technical support for Gaoshiti-Moxi area.
1H-Imidazol-3-ium-4-carboxylate
Qiang Cao,Bao-Rong Duan,Bin Zhu,Zhen Cao
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536811052998
Abstract: In the title compound, C4H4N2O2, both imidazole N atoms are protonated and carboxylate group is deprotonated, resulting in a zwitterion. The molecule is essentially planar, with an r.m.s. deviation of 0.012 (1) . In the crystal, N—H...O hydrogen bonds and π–π stacking interactions [centroid–centroid distance = 3.674 (2) ] between the imidazole rings link the molecules into a three-dimensional supramolecular network.
Multiple values and uniqueness problem of meromorphic mappings sharing hypersurfaces
Ting-Bin Cao,Hong-Zhe Cao
Mathematics , 2013,
Abstract: The purpose of this article is to deal with the multiple values and uniqueness problem of meromorphic mappings from $\mathbb{C}^{m}$ into the complex projective space $\mathbb{P}^{n}(\mathbb{C})$ sharing fixed and moving hypersurfaces. We obtain several uniqueness theorems which improve and extend some known results.
Maximizing Resilient Throughput in Peer-to-Peer Network  [PDF]
Bo Liu, Fan Qiu, Yanchuan Cao, Bin Chang, Yi Cui, Yuan Xue
Communications and Network (CN) , 2011, DOI: 10.4236/cn.2011.33021
Abstract: A unique challenge in P2P network is that the peer dynamics (departure or failure) cause unavoidable disruption to the downstream peers. While many works have been dedicated to consider fault resilience in peer selection, little understanding is achieved regarding the solvability and solution complexity of this problem from the optimization perspective. To this end, we propose an optimization framework based on the generalized flow theory. Key concepts introduced by this framework include resilience factor, resilience index, and generalized throughput, which collectively model the peer resilience in a probabilistic measure. Under this framework, we divide the domain of optimal peer selection along several dimensions including network topology, overlay organization, and the definition of resilience factor and generalized flow. Within each sub-problem, we focus on studying the problem complexity and finding optimal solutions. Simulation study is also performed to evaluate the effectiveness of our model and performance of the proposed algorithms.
A Quantitative Structure-Property Relationship (QSPR) Study of Aliphatic Alcohols by the Method of Dividing the Molecular Structure into Substructure
Fengping Liu,Chenzhong Cao,Bin Cheng
International Journal of Molecular Sciences , 2011, DOI: 10.3390/ijms12042448
Abstract: A quantitative structure–property relationship (QSPR) analysis of aliphatic alcohols is presented. Four physicochemical properties were studied: boiling point (BP), n-octanol–water partition coefficient (lg? P OW), water solubility (lg? W) and the chromatographic retention indices (RI) on different polar stationary phases. In order to investigate the quantitative structure–property relationship of aliphatic alcohols, the molecular structure ROH is divided into two parts, R and OH to generate structural parameter. It was proposed that the property is affected by three main factors for aliphatic alcohols, alkyl group R, substituted group OH, and interaction between R and OH. On the basis of the polarizability effect index (PEI), previously developed by Cao, the novel molecular polarizability effect index (MPEI) combined with odd-even index (OEI), the sum eigenvalues of bond-connecting matrix (SX 1CH) previously developed in our team, were used to predict the property of aliphatic alcohols. The sets of molecular descriptors were derived directly from the structure of the compounds based on graph theory. QSPR models were generated using only calculated descriptors and multiple linear regression techniques. These QSPR models showed high values of multiple correlation coefficient ( R?> 0.99) and Fisher-ratio statistics. The leave-one-out cross-validation demonstrated the final models to be statistically significant and reliable.
Dynamic Simulation of Hybrid-driven Planar Five-bar Parallel Mechanism Based on SimMechanics and Tracking Control
Bin Zi,Jianbin Cao,Zhencai Zhu
International Journal of Advanced Robotic Systems , 2011,
Abstract: This paper investigates dynamic simulation and trajectory tracking control of hybrid‐driven planar five‐bar parallel mechanism (HPPM). To begin with, a simulation model of dynamics based on MATLAB/SimMechanics is established. Then, traditional PD control and closed loop PD‐type iterative learning control of the HPPM are designed. At the end, the simulation based on SimMechanics is carried out, which acquires angular, angular velocity, angular acceleration of two driving links and constraint reaction of kinematic pairs at any time. In addition, the performance of the closed loop PD‐type iterative learning control is compared with that of the traditional PD controller through simulations of the HPPM in the presence of the model external disturbances. The simulation results indicate that a perfect trajectory tracking of end‐effector of the HPPM is achieved by the closed loop PD‐type iterative learning controller.
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