Publish in OALib Journal
APC: Only $99
Single Web server would become a bottleneck that influences the availability and stability of Web service. Ten years ago, what had been proposed is to add Web servers for resolving this problem—Web Server Cluster. In recent years, the concept of cloud computing has got rapid development, and is becoming the future development trend of the IT industry. One of the characteristics of cloud computing is putting lots of computing resources together to provide users with a unified service. In this paper, we have proposed a new Cloud-Based Web Server Cluster Solution, based on the existing cloud computing model—Twitter Storm. It involves a new way to handle the web request from client and some other new features compared to the traditional Web Server Cluster. Combining with cloud computing, it would be the new trend of Web Server Cluster, and its feasibility is described in the paper too.
In this paper, we study the global and pullback attractors for a strongly damped wave equation with delays when the force term belongs to different space. The results following from the solution generate a compact set.
This study aimed to find a simple and effective mindfulness training method for intervening depression. 95 university students with moderate or severe depression participated in the study and they were divided into three mindfulness training groups: 8-week complete group, 8-week informal group, and 4-week group. All subjects completed Beck Depression Inventory (BDI-Ⅱ) and Five Fact Mindfulness Questionnaire (FFMQ) before the intervention, after which, 55 subjects completed the assessments once more. Results showed the scores of specific dimensions representing mindfulness levels were different. For the 4-week group, scores of description, action aware and nonjudge significantly were improved, while the other two groups were improved significantly on all the five dimensions, especially the informal training group. In the discussion, it focused more on the effects of training time and training contents, and briefly discussed the relation of subjects dropout, subjects attendance, homework completion status and intervention effects. In conclusion, all the three intervention modes have magnificent intervention effects. Integrated many sided, 8-week informal training is of the best effects, which may be considered as a better mindfulness training mode henceforth, however, the comparison between the formal training and informal training still needs further study.
Unilateral power supply system has been used because of
the management status of the power grid system, while, bilateral power supply
system is adopted in the Soviet Union and France. The feasibility that
whether bilateral system can be put applied in China is discussed. Compared with
unilateral power supply system, bilateral system has better reliability and
better capability of supply power system, which gives bilateral system more
advantages over unilateral system on both engineering investment and operating
efficiency. In this paper, voltage losses under the two different systems are
calculated and also compared, the advantages of bilateral system is explored
and then conclusion is drawn by referring to the practical data of passenger