A Secure Rotation Invariant LBP Feature Computation in Cloud Environment

In the era of big data,outsourcing massive data to a remote cloud server is a promising approach.Outsourcing storage and computation services can reduce storage costs and computational burdens.However,public cloud storage brings about new privacy and security concerns since the cloud servers can be shared by multiple users.Privacy-preserving feature extraction techniques are an effective solution to this issue.Because the Rotation Invariant Local Binary Pattern(RILBP)has been widely used in various image processing fields,we propose a new privacy-preserving outsourcing computation of RILBP over encrypted images in this paper(called PPRILBP).To protect image content,original images are encrypted using block scrambling,pixel circular shift,and pixel diffusion when uploaded to the cloud server.It is proved that RILBP features remain unchanged before and after encryption.Moreover,the server can directly extract RILBP features from encrypted images.Analyses and experiments confirm that the proposed scheme is secure and effective,and outperforms previous secure LBP feature computing methods.

Fano resonance and magneto-optical Kerr rotaion in periodic Co/Ni complex plasmonic nanostructure

we report a pure rerromagneuc metallic magnetopiasmonic structure consisting or two-dimensional oraerea Ni nanodisks array on Co film.With a sufficient height of the nanodisks,a steep and asymmetric Fano resonance can be excited in this structure.We attribute the fascinating spectral lineshape to the strong coupling between the excitation of surface plasmon polaritons at the interface and the localized surface plasmon resonance of nanodisks.The conclusion is fully confirmed by spectrum measurements in nanostructures with different heights.Furthermore,the enhancement and sign of the magneto-optical Kerr rotation in this structure are significantly modified by the Fano resonance.

The Geographical Rotation of Local Officials and Enterprise Cross-city Mergers and Acquisitions in China

The economic impact of the geographical rotation of local officials is important in China's official management system.This study used a zero-inflated Poisson regression model and found that the geographical rotation of local officials significantly increased cross-city mergers and acquisitions(M&As)of enterprises.The impact of local officials'geographical rotation on M&As was more pronounced under certain conditions.These conditions included:(i)when officials were transferred from cities with a higher development level to cities with a lower development level;(ii)when the outflow cities were municipalities directly governed by the central government,provincial capitals,or separately listed cities;(iii)when the transfers of officials occurred within the same province;(iv)when the transfers took place before 2012;and(v)when the transfers happened in the years following significant central government conferences,which provided strong political incentives for M&As.