550 Result(s)
within
Engineering
Zhi-**a Yang
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Article
Polymerization of methyl methacrylate with iron-ytterbium dinuclear metallocene catalyst
A novel iron-ytterbium dinuclear catalyst, FcB(MeCp) Yb (MeCp) Cl (Fc: ferrocenyl, B: diethylene ether), was synthesized for the polymerization of methyl methacrylate (MMA). Synergistic effects between the fer...
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Article
Polymerization of methyl methacrylate with ethylene bridged heterodinuclear metallocene of samarium and titanium-study on synergism and kinetics
Comparison of MMA polymerization results with samarocene chloride, titanocene chloride and the title heterodinuclear (Sm−Ti) catalyst, respectively, showed synergism in the Sm-Ligand-Ti system, which obviously...
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Article
Algorithms for semi on-line multiprocessor scheduling problems
In the classical multiprocessor scheduling problems, it is assumed that the problems are considered in off-line or on-line environment. But in practice, problems are often not really off-line or on-line but so...
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System design and analysis of the trans-critical carbon-dioxide automotive air-conditioning system
As an environmentally harmless and feasible alternate refrigerant, CO2 has attracted worldwide attention, especially in the area of automobile air-conditioning (AAC). The thermal property of CO2 and its trans-cri...
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Article
Research on pattern recognition for marine steam turbine rotor axis orbit
The structure, function and recognition method of an axis orbit auto-recognizing system are presented in this paper. In order to make the best use of information of format and dynamic characteristics of marine...
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Article
Off-pump coronary artery bypass grafting versus on-pump coronary artery bypass grafting: which is better in patients with chronic obstructive pulmonary disease?
To evaluate the clinic outcome of off-pump coronary bypass grafting (OPCABG) of patients with coronary heart disease and chronic obstructive pulmonary disease, we collected and analyzed 1998–2002 data on 28 pa...
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Effect of lead exposure on the immune function of lymphocytes and erythrocytes in preschool children
Objective: To investigate the influence of lead exposure on the immune function of lymphocytes and erythrocytes in preschool children. Materials and methods: A group of 217 children three to six years of age f...
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Mechanics model of additional longitudinal force transmission between bridges and continuously welded rails with small resistance fasteners
A new mechanics model, which reveals additional longitudinal force transmission between the continuously welded rails and the bridges, is established on the fact that the influence of the mutual relative displ...
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Article
Genetic programming-based chaotic time series modeling
This paper proposes a Genetic Programming-Based Modeling (GPM) algorithm on chaotic time series. GP is used here to search for appropriate model structures in function space, and the Particle Swarm Optimizatio...
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Article
Adaptive vibration isolation system for diesel engine
An active two-stage isolation mounting, on which servo-hydraulic system is used as the actuator (secondary vibration source) and a diesel engine is used as primary vibration source, has been built. The upper m...
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Article
Perturbation finite volume method for convective-diffusion integral equation
A perturbation finite volume (PFV) method for the convective-diffusion integral equation is developed in this paper. The PFV scheme is an upwind and mixed scheme using any higher-order interpolation and second...
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Article
The study of backlash compensation and its application in the robot checking the filter
The method based on backlash feedforward compensation is discussed. Feedforward control is realised by the prediction technique so that the system has relatively high position precision under the low cost gear...
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Article
Optimal bandwidth scheduling of networked control systems (NCSs) in accordance with jitter
Network-induced delay and jitter are key factors causing performance degradation and instability of NCSs (networked control systems). The relationships between the sampling periods of the control loops, networ...
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Article
A high fidelity VQ coding algorithm with region adaptive subbanding
Image subbands can be obtained by using filterbank. Traditional compression method uses direct entropy coding for each subband. After studying the energy distribution in image subbands, we proposed a vector qu...
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Article
A frame synchronization solution for orthogonal frequency division multiplexing system
To improve frame synchronization precision, a scheme named training symbol correlation (TSC) is presented for orthogonal frequency division multiplexing (OFDM) system. Based on the solution from Schmidl and Co...
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Article
Feasibility study of marrow stromal cells transplantation into guinea pig cochlea
Objective This pilot-study was designed to evaluate the feasibility of cell transplantation into guinea pig cochlea. Methods Marrow stromal cells were labeled with DAPI, and then implanted into the cochlea of gui...
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Article
Identification and significance of differential proteins in A549 cells transfected with HLCDG1
HLCDG1, which locates in chromosome 5q33, is a novel gene cloned recently. The HLCDG1 expression was significantly down regulated in the primary lung carcinoma. It was previously studied that HLCDG1 acted like...
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Article
Study on the heat transfer of cross flow in vertical upward tubes
A special device was designed to measure temperature difference in this study of heat transfer of water and oil cross flow inside vertical upward tubes. A new heat transfer correlation was obtained for cross f...
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Article
A nonlinear model reference adaptive inverse control algorithm with pre-compensator
In this paper, the reduced-order modeling (ROM) technology and its corresponding linear theory are expanded from the linear dynamic system to the nonlinear one, and H ∞ control theory is employed ...
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Article
Constitutive Model for an FCC Single-Crystal Material
Taking into account the effects that the components of tension stresses couple with components of torsion stresses when off-axis loads are applied to orthotropic materials, Hill’s yield criterion for plastical...
