In this letter, poly(vinylidene difluoride) (PVDF)/(Y0.97Eu0.03)2O3 rare-earth nanocomposites were prepared by a simple co-precipitation method, and their morphology, structure, and optical properties were investigated. The scanning electron microscope (SEM) images showed that the (Y0.97Eu0.03)2O3

It is well known that a light spot of sub-wavelength will diverge in all directions. In this letter, A method is presented for generating sub-wavelength (0.44\lambda) longitudinally polarized beam, which propagates without divergence over lengths of about 2\lambda in free space. This is achieved by a high numerical aperture (NA) lens axicon that utilizes spherical aberration to duplicate the performance of an axicon and to create an extended focal line.

bindiff6.msi是原版，只支持Win8.1以上的系统；bindiff6_Fix_support_win7.msi在原版基础上使用Orca修改了LauchCondition字段，支持Win7x64。需要JDK。

在存储服务中，可搜索加密方案使得用户能够有选择的访问其密文数据，同时还能确保用户搜索数据的机密性，基于连接关键词（即多个关键词的布尔组合）的可搜索加密方案因其更高的搜索精度在安全存储服务中有着重要的应用价值。目前已有的基于连接关键词的可搜索加密方案存在诸如连接关键词的陷门太大、搜索效率不高及不支持多用户等问题。本文采用授权用户和存储服务器先后对关键词加密的方式提出了一个高效的基于连接关键词的可搜索加密方案，使得授权用户能够利用连接关键词的陷门搜索加密文档。在确定性Diffie-Hellman问题假设下，证明了方案的安全性。通过与现有方案相比较，提出的方案在通信和计算代价，即搜索陷门大小、关键词加密和搜索的速度，等方面的综合效率得到提高。此外，提出的方案支持多用户，即能够动态的增加和撤销用户，使得用户能够直接在存储服务器上进行数据共享。

Cryptanalysis of Permutation–Diffusion-Based Lightweight Chaotic Image Encryption Scheme Using CPA

Screen Content Image Quality Assessment Using Multi-Scale Difference of Gaussian

Growth and Temperature-depending Raman characterization of different nitrogen-doped 4H-SiC crystals

Basal plane bending of 4H-SiC single crystals grown by sublimation method with different seed attachment methods

Solving CEC 2015 Multi-modal Competition Problems Using Neighborhood Based SpeciationDifferential Evolution

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