In their paper, Leesakul, Townend and Xu proposed a dynamic deduplication scheme for cloud storage, aiming to improve storage efficiency and maintaining redundancy for fault tolerance. The


Nowadays, the digital graphics tablet is a common device in both colleges and companies. The digital graphics tablet is a kind of computer input device that mainly orients designers, fine art-related students and teachers, advertising companies, design studios, Flash vector animators and some art lovers. Most of the paintings related to design and characters in movies are accomplished by drawing on the digital board and by post-processing on the computer. The present digital graphics tablet can well meet all the requirements, but with limitations such as the low battery time and insufficient storage space, which even cause a serious impact on the users’ experience. To remedy this limitation of low battery time, Dreyer proposed the use of solar panels to collect solar energy for transforming it into electricity to be used by the tablet. In his paper, the solar panel is the core part of the solar energy system, which plays a big role in the output of the direct current in the battery after the transformation of sunlight energy into electrical energy. The present solar energy panel is normally used by silicon panels, which are inefficient with high cost. While the search for more efficient but less expensive solar panels is ongoing, we can take the advantage of David Bradley’s paper. In his paper, a US team has found that stacking perovskites on to a conventional silicon solar cell can boost efficiency. Michael McGehee of Stanford University and colleagues point out that the dominant photovoltaic technology based on silicon got stuck at 25% efficiency about 15 years ago. However, a way to break through to higher

more specific details are organized as follows. Section 2 introduces the function modules of the product. Section 3 provides some discussions. Section 4 concludes this paper.