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Online since: May 2014
Authors: Le Gao, Yin Han Gao, Kai Yu Yang, Tian Hao Wang
According to the university and the enterprise's own situation, put The demands of the enterprise as the guide, research on each factor research of university-industry-research cooperation mechanism based on colleges and universities. On the analysis of the obstacles of cooperative mechanism in China, at the same time, the countermeasures of each factor of the cooperation mechanism is studied. The purpose is to coordinate each factor of the university-industry-research cooperation systems, to realize the optimization target of the system, to explore and summarizes the countermeasures of sustainable development in the practice of industry-university-institute cooperation.
Online since: September 2013
Authors: Jian Zhang, Jian Xing Ren, Tian Yu Sun, Qin Yang Wang
The rapid increase in the concentration of CO2 raises global concern. The latest research indicates that the concentration has reached a new peak of 400[1] ppm. Effective CO2 abatement strategies, such as Carbon Capture and Storage (CCS), are of great interest. One common method of CCS is MEA absorption. This paper aims to illustrate post-combustion capture with MEA solvent. The principles, procedures, influencing factors, advantages and drawbacks are discussed to better understand what hinders existing power plants from retrofitting with this technology.
Online since: February 2014
Authors: Xiu Mei Han, Jing Luo, Xiao Ping Lin, Hui Guang Yang, Yun Dong, Tian Bo Zhao
The microstructures of the Mg-6Zn-2Y alloy solidified under high pressures were investigated using scanning electronic microscopy (SEM) and X-ray diffraction (XRD). The room-temperature compression behavior was analyzed through experiments, showing that the microstructures of the alloys are consisted of α-Mg and quasicrystal I-Mg3Zn6Y phases. With solidification pressure increasing, the microstructures were refined, and the morphologies of the inter-dendritic secondary phase were improved from continuous networks into long-island and granule. The compression strength, yielding strength and compressibility were increased significantly corresponding with solidification pressure, from 259.02 MPa, 230.39 MPa and 18.3% under ambient pressure to 361.43 MPa, 272.25 MPa and 33.1% under high pressure of 6 GPa. The cleavage planes are flat, and the cleavage steps are straight under ambient pressure. However, the cleavage planes are small and rough under 4-6 GPa; tearing dimples occur in the tearing area, indicating that the degree of cleavage fracture decreases under high pressure.
Online since: October 2012
Authors: Shi Jie Wang, Yu Li Wang, Peng Fei Yang, Tian Duo Li
Polyurethane prepolymer capped by vinyl group (PUV) was synthesized by reaction of hydroxyethyl methacrylate and toluene diisocyanate using di-n-butyltin dilaurate as catalyst, and then polyurethane-poly(butyl acrylate) hybrid latexes were prepared via miniemulsion polymerization of PUV and butyl acrylate (BA). Fourier transform infrared, differential scanning calorimeter were adapted to characterize the structure of PUV and PU-PBA and the properties of their films. The results show that the decrease of BA/PUV ratio result in an increase of the hardness and glass transition (Tg) of PU-PBA, but reduce the stability of miniemulsion and elasticity of final copolymer films.
Online since: November 2010
Authors: Run Dong Li, Tian Hua Yang, Wan Li Xing, Xing Ping Kai, Ye Guang He
Rice straw and Tiefa coal were used as experimental materials. Under the conditions of different temperatures and Cl/K molar ratio, the experiment was performed by using co-firing devices and ion measure instruments (flame photometer and a visible spectrophotometer). The results reveal that the majority of alkali metals and chlorine are released to gas phase by the precipitation of alkali chloride and HCl(g) above 700°C. Alkali metals release increase with the raising of chlorine content in raw materials. Alkali metals release related to sulfur, silicon and aluminum etc.
Online since: December 2010
Authors: Jing Ya Wu, Yu Tian Chen, Yong Jie Yang, Jiang Yuan, Zi Xue Qiu
When Shape memory alloy (SMA) wires are embedded in the composite structure with a specific volume fraction, the properties of the resulting hybrid composite structure, which is called SMA-reinforced composite structure, will be reinforced. Some of SMA wires embedded in the composite can be viewed as two electrodes of the capacitor. The deformation of the composite structure will cause change of the capacitor, therefore the segmental SMA wires embedded in the composite may be considered as the self-sensitive element of structure strain monitoring. The measurement circuit monitoring the change of micro capacitor in structure is designed, and it is integrated with radio frequency identification (RFID) technology to compose RFID sensor-tag, and the variation of capacitor is send to the RFID reader wirelessly to form a wireless health monitoring system. Experimental results show that this RFID sensor-tag and its system can be feasibly used in wireless structural health monitoring of SMA-reinforced composite structure.
Online since: April 2014
Authors: Bo Yang Song, Yan Zhong, Reng Kui Liu, Fu Tian Wang
Safe operation is the basic requirement of railway operation. Reasonable maintenance is the basic guarantee for the safe operation. Big data to analyze things as a rule of a cutting edge technology, applied to the analysis of railway detecting data processing, can improve the testing data of the use of the quality and efficiency of analysis. Based on big data, this paper points out state railway equipment management, reasonable status classification, solving the state transition probability, the prediction model is set up, providing better decision support for maintenance and repair work.
Online since: August 2013
Authors: Yu Liu, Xuan Yang, Hong Kuan Li, Hong Xiao Tian, Jian Gao
The nickelII complex [Ni (C9H9O3)2(H2O)2], Diaqua-bis (ethylvanillinato-O,O')-nickelII, the NiII atom is located on a twofold axis and is coordinated by two ethylvanillinate anions and two water molecule in a distorted octahedral geometry . The ethylvanillinate ligand chelates to the NiII atom through its ethyl and hydroxy O atoms,with greatly differing Ni-O bond distances (2.282(2) Å and 1.9792(16)Å). Adjacent complex link to each other via hydrogen bonds forming the three-dimensional supramolecular structure.
Online since: March 2015
Authors: Zhao Yang Qu, Tian Hang Zhang, Jia Yan, Shao Qing Xu
This paper presents a method for smart house electricity load control. The method, combined with TOU price and Real-time pricing, arranges various appliances and meets daily household electricity demand at the same time, so that to reduce the daily electricity consumption and realize Demand Response. First, this paper attempts to summarize problem witch need to be solved for realizing load control in a smart house. Second, the smart house load control problem was described as high-dimensional complex functions unconstrained optimization model and solved with Particle Swarm Optimization. Finally, design experiments used the method for a smart house. Experimental results show that the method can arrange various appliances and reduce electricity consumption.
Online since: January 2012
Authors: Zhi Li Sun, Yu Tao Yan, Tian Qi Hu, Guang Yang Hu
For increasing the experimental efficiency and shortening the experimental time, the uniform design method was used to establish the wear experiment scheme on the tribological properties of the sealing material CrMo cast iron. The experiments were investigated on a vertical universal friction and wear tester, the worn surfaces of specimens were observed by scanning electron microscope (SEM). The results showed that the experiment points chosen by the uniform design is reasonable and effective, and the wear rate distribution rule of the CrMo cast iron was established and was divided three regions, the effect on wear rate in the I region and the III region was more serious than the II region, and the variation of the friction coefficient is bigger under experimental conditions, the main wear mechanism of the CrMo cast iron is desquamation wear and adhesive wear. The load and sliding speed coupling effect on wear of the CrMo cast iron must be thought over.
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