This paper concentrates on the research of customer relationship management system of small and medium-sized enterprises. It elaborates the definition and role of small and medium-sized enterprises as well as the conn...
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This thesis chooses the Z-score index to measure commercial banks' risk-taking behavior. Then Panel data model is used to empirically analyze in the year from 2001 to 2008, it is indicated that by using non-linear...
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Electrochemical oxidation, as one of the environmental-friendly technologies in wastewater treatment processes, has high efficiency in organic pollutants degradation and ammonia and nitrate removal. Wenyu River(a rive...
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The failure mechanism of lead-free solder interconnections of chip scale package-sized Ball Grid Array (BGA) component boards under thermal cycling was studied by employing cross-polarized light microscopy, scanning e...
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The failure mechanism of lead-free solder interconnections of chip scale package-sized Ball Grid Array (BGA) component boards under thermal cycling was studied by employing cross-polarized light microscopy, scanning electronic microscopy, electron backscatter diffraction, and nanoindentation. It was determined that the critical solder interconnections were located underneath the chip corners, instead of the corner most interconnections of the package, and the highest strains and stresses were concentrated at the outer neck regions on the component side of the interconnections. Observations of the failure modes were in good agreement with the finite element results. The failure of the interconnections was associated with changes of microstructures by recrystallization in the strain concentration regions of the solder interconnections. Coarsening of intermetallic particles and the disappearance of the boundaries between the primary Sn cells were observed in both cases. The nanoindentation results showed lower hardness of the recrystallized grains compared with the non-recrystallized regions of the same interconnection. The results show that failure modes are dependent on the localized microstructural changes in the strain concentration regions of the interconnections and the crack paths follow the networks of grain boundaries produced by recrystallization.
Pyrolysis utilizes biomass to produce a liquid product bio-oil which is widely used as a potential energy source and a low-cost feedstock for chemical production. Considerable efforts have been made to convert biomass...
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The international financial crisis affected the healthy development of some small and medium enterprises our country, also exposed the problems to be solved in the development of small and medium-sized enterprises. Ho...
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Electrochemical oxidation, as one of the environmental-friendly technologies in wastewater treatment processes, has high efficiency in organic pollutants degradation and ammonia and nitrate removal. Wenyu River(a rive...
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Electrochemical oxidation, as one of the environmental-friendly technologies in wastewater treatment processes, has high efficiency in organic pollutants degradation and ammonia and nitrate removal. Wenyu River(a river crossing Beijing city of China) water contains high concentration of ammonia and total nitrogen(TN) with low biodegradability and low ratio of BOD5 to TN, the conventional activated sludge and biofilm processes were difficulty to treat this kind of wastewater. For above reasons, the coupling system of electrochemical oxidation and constructed wetland was developed for removal of organic pollutants and nitrogen compounds. In this paper, the operating parameters and the energy consumption of Ti/RuO2-TiO2-IrO2 anode cell were analyzed. Furthermore, the pollutants removal efficiency in coupling system was observed and the results revealed that excellent effluent quality can be obtained and it can meet the requirement of Grade III of Surface Water Quality Standard and TN emission of 15mg/L.
Contraposing the basic principles and mechanism of the real-time operating system, the paper has compared general operating systems with real-time operating system, and made a good effort to analyze the key factors wh...
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ISBN:
(纸本)9781424436927
Contraposing the basic principles and mechanism of the real-time operating system, the paper has compared general operating systems with real-time operating system, and made a good effort to analyze the key factors which may affect the real-time characteristics of operating system, and then given a assessment methods to evaluate the real-time character of operating system. A practical application system is also tested at last.
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