A Novel 2D Hyperchaotic with a Complex Dynamic Behavior for Color Image Encryption

The generation method of the key stream and the structure of the algorithm determine the security of the cryptosystem.The classical chaotic map has simple dynamic behavior and few control parameters,so it is not suitable for modern cryptography.In this paper,we design a new 2D hyperchaotic system called 2D simple structure and complex dynamic behavior map(2D-SSCDB).The 2D-SSCDB has a simple structure but has complex dynamic behavior.The Lyapunov exponent verifies that the 2D-SSCDB has hyperchaotic behavior,and the parameter space in the hyperchaotic state is extensive and continuous.Trajectory analysis and some randomness tests verify that the 2D-SSCDB can generate random sequences with good performance.Next,to verify the excellent performance of the 2D-SSCDB,we use the 2D-SSCDB to generate a keystream for color image encryption.In the encryption algorithm,the encryption algorithm scrambles and diffuses simultaneously,increasing the cryptographic system’s security.The horizontal correlation,vertical correlation,and diagonal correlation of ciphertext are−0.0004,−0.0004 and 0.0007,respectively.The average information entropy of the ciphertext is 7.9993.In addition,the designed encryption algorithm reduces the correlation between the three channels of the color image.Security analysis shows that the color image encryption algorithm designed using 2DSSCDB has good security,can resist standard attack methods,and has high efficiency.

3D Model Encryption Algorithm by Parallel Bidirectional Diffusion and 1D Map with Sin and Logistic Coupling

3D models are essential in virtual reality,game development,architecture design,engineering drawing,medicine,and more.Compared to digital images,3D models can provide more realistic visual effects.In recent years,significant progress has been made in the field of digital image encryption,and researchers have developed new algorithms that are more secure and efficient.However,there needs to be more research on 3D model encryption.This paper proposes a new 3D model encryption algorithm,called the 1D map with sin and logistic coupling(1D-MWSLC),because existing digital image encryption algorithms cannot be directly applied to 3D models.Firstly,this paper introduce 1D-MWSLC,which has a wider range of parameters compared to traditional 1D chaotic systems.When the parameter exceeds a specific range,the chaotic phenomenon does not weaken.Additionally,1D-MWSLC has two control parameters,which increases the cryptosystem’s parameter space.Next,1D-MWSLC generates keystreams for confusion and diffusion.In the confusion stage,this paper use random confusion,and the keystream generates an index matrix that confuses the integer and decimal parts of the 3D model simultaneously.In the diffusion stage,this paper use parallel bidirectional diffusion to simultaneously diffuse the integer parts of the three coordinates of the 3D model.Finally,this paper verify the proposed algorithm through statistical analysis,and experimental results demonstrate that the proposed 3D model encryption algorithm has robust security.

D-ZENIC:A Scalable Distributed SDN Controller Architecture

In a software-defined network, a powerful central controller provides a flexible platform for defining network traffic through the use of software. When SDN is used in a large-scale network, the logical central controller comprises multiple physical servers, and multiple controllers must act as one to provide transparent control logic to network applications and devices. The challenge is to minimize the cost of network state distribution. To this end, we propose Distributed ZTE Elastic Network Intelligent Controller （DZENIC）, a network-control platform that supports distributed deployment and linear scale-out. A dedicated component in the DZENIC controller provides a global view of the network topology as well as the distribution of host information. The evaluation shows that balance complexity with scalability, the network state distribution needs to be strictly classified.

High-efficiency asymmetric diffraction based on PT-antisymmetry in quantum dot molecules

We present preparation of asymmetric grating with higher diffraction efficiency in quantum dot molecules by combining the tunneling effect and parity-time antisymmetry.In the presence of tunneling between two quantum dots,the system exhibits the striking PT antisymmetry via spatially modulating the driving field and the detuning with respect to the driven transition.For this reason,the asymmetric grating could be achieved.The results show that the diffraction efficiency can be adjustable via changing the driving intensity,detuning,tunneling strength,and interaction length,and then the high-order diffraction can be reached.The scheme provides a feasible way to obtain the direction-controlled diffraction grating,which can be helpful for optical information processing and realization of controllable optical self-image.

Deciphering the Oxygen Absorption Pre-edge: A Caveat on its Application for Probing Oxygen Redox Reactions in Batteries

The pre-edges of oxygen-K X-ray absorption spectra have been ubiquitous in transition metal(TM)oxide studies in various fields,especially on the fervent topic of oxygen redox states in battery electrodes.However,critical debates remain on the use of the O-K pre-edge variations upon electrochemical cycling as evidences of oxygen redox reactions,which has been a popular practice in the battery field.This study presents an investigation of the O-K pre-edge of 55 oxides covering all 3d TMs with different elements,structures,and electrochemical states through combined experimental and theoretical analyses.It is shown unambiguously that the O-K pre-edge variation in battery cathodes is dominated by changing TM-d states.Furthermore,the pre-edge enables a unique opportunity to project the lowest unoccupied TM-d states onto one common energy window,leading to a summary map of the relative energy positions of the low-lying TM states,with higher TM oxidation states at lower energies,corresponding to higher electrochemical potentials.The results naturally clarify some unusual redox reactions,such as Cr^(3+/6+).This work provides a critical clarification on O-K pre-edge interpretation and more importantly a benchmark database of O-K pre-edge for characterizing redox reactions in batteries and other energy materials.

A high-performance rechargeable Li–O_2 battery with quasi-solid-state electrolyte

A novel transparent and soft quasi-solid-state electrolyte （QSSE） was proposed and fabricated, which consists of ionic liquid （PYR14TFSI） and nano-fumed silica. The QSSE demonstrates high ionic conductivity of 4.6× 10-4 S/cm at room temperature and wide electrochemical stability window of over 5 V. The Li-O2 battery using such quasi-solidstate electrolyte exhibits a low charge-discharge overpotential at the first cycle and excellent long-term cyclability over 500 cycles.

A P2PSIP System with Intelligent Routing Function on the Media Plane

Decentralized peer-to-peer session initiation protocol （P2PSIP） provides the same services as legacy SIPs such as IMS. However, in relatively open network, the requirement for route efficiency in a complex environment brings about undefined problems. To deploy a controllable P2PSIP network, perfect mechanisms have to be appended, especially in QoS, security, and management. Several proposals for QoS, network address translation （NAT）, and interworking have been put forward. In this paper, we propose an integrated architecture for a P2PSIP system as well as a proactive intelligent routing scheme on the media plane used in system. Implementation and simulation show that our solution is suitable for operation and management.

Eye-safe intra-cavity diamond cascaded Raman laser with high peak-power and narrow linewidth

The 1.4–1.8μm eye-safe lasers have been widely used in the fields of laser medicine and laser detection and ranging.The diamond Raman lasers are capable of delivering excellent characteristics,such as good beam quality concomitantly with high output power.The intra-cavity diamond Raman lasers have the advantages of compactness and low Raman thresholds compared to the external-cavity Raman lasers.However,to date,the intra-cavity diamond cascaded Raman lasers in the spectral region of the eye-safe laser have an output power of only a few hundred milliwatts.A 1485 nm Nd:YVO_4/diamond intra-cavity cascaded Raman laser is reported in this paper.The mode matching and stability of the cavity were optimally designed by a V-shaped folded cavity,which yielded an average output power of up to 2.2 W at a pulse repetition frequency of 50 kHz with a diode to second-Stokes conversion efficiency of 8.1%.Meanwhile,the pulse width of the second-Stokes laser was drastically reduced from 60 ns of the fundamental laser to 1.1 ns,which resulted in a high peak power of 40 kW.The device also exhibited single longitudinal mode with a narrow spectral width of<0.02 nm.

Observation of transition from superfluorescence to polariton condensation in CsPbBr3 quantum dots film

The superfluorescence effect has received extensive attention due to the many-body physics of quantum correlation in dipole gas and the optical applications of ultrafast bright radiation field based on the cooperative quantum state.Here,we demonstrate not only to observe the superfluorescence effect but also to control the cooperative state of the excitons ensemble by externally applying a regulatory dimension of coupling light fields.A new quasi-particle called cooperative exciton-polariton is revealed in a light-matter hybrid structure of a perovskite quantum dot thin film spin-coated on a Distributed Bragg Reflector.Above the nonlinear threshold,polaritonic condensation occurs at a nonzero momentum state on the lower polariton branch owning to the vital role of the synchronized excitons.The phase transition from superfluorescence to polariton condensation exhibits typical signatures of a decrease of the linewidth,an increase of the macroscopic coherence as well as an accelerated radiation decay rate.These findings are promising for opening new potential applications for super-brightness and unconventional coherent light sources and could enable the exploitation of cooperative effects for quantum optics.

Perturbation-driven echo-like superfluorescence in perovskite superlattices

The collective response of macroscopic quantum states under perturbation is widely used to study quantum correlations and cooperative properties,such as defect-induced quantum vortices in Bose–Einstein condensates and the non-destructive scattering of impurities in superfluids.Superfluorescence(SF),as a collective effect rooted in dipole–dipole cooperation through virtual photon exchange,leads to the macroscopic dipole moment(MDM)in high-density dipole ensembles.However,the perturbation response of the MDM in SF systems remains unknown.Echo-like behavior is observed in a cooperative exciton ensemble under a controllable perturbation,corresponding to an initial collapse followed by a revival of the MDM.Such a dynamic response could refer to a phase transition between the macroscopic coherence regime and the incoherent classical state on a time scale of 10 ps.The echo-like behavior is absent above 100 K due to the instability of MDM in a strongly dephased exciton ensemble.Experimentally,the MDM response to perturbations is shown to be controlled by the amplitude and injection time of the perturbations.

NASICON-structured Na3.1Zr1.95Mg0.05Si2PO12 solid electrolyte for solid-state sodium batteries

Using stable inorganic solid electrolyte to replace organic liquid electrolyte could significantly reduce potential safety risks of rechargeable batteries. Na-superionic conductor （NASICON）-structured solid electrolyte is one of the most promising sodium solid electrolytes and can be employed in solid-state sodium batteries. In this work, a NASICON-structured solid electrolyte Na3.1Zr1.95Mg0.05Si2PO12 was synthesized through a facile solid-state reaction, yielding high sodium-ionic conductivity of 1.33 × 10-3 S.cm^-1 at room temperature. The results indicate that Mg^2＋ is a suitable and economical substitution ion to replace Zr^4＋, and this synthesis route can be scaled up for powder preparation with low cost. In addition to electrolyte material preparation, solid-state batteries with Na3.1Zr1.95Mg0.05Si2PO12 as electrolyte were assembled. A specific capacity of 57.9 mAh·g^-1 is maintained after 100 cycles under a current density of 0.5C rate at room temperature. The favorable cycling performance of the solid-state battery suggests that Na3.1Zr1.95Mg0.05Si2PO12 is an ideal electrolyte candidate for solid-state sodium batteries.

Light gain amplification in microcavity organic semiconductor laser diodes under electrical pumping

Organic semiconductor is one of the most promising luminescent and lasing materials that can be chemically synthesized with a controllable performance and possess high cross-section of stimulated emission[1].Organic semiconductor laser diodes(OSLDs)can be prepared by simple processing technologies and integrated easily with other optoelectronic devices.As a result,OSLDs would

P2-type Na_(0.6)[Mg(Ⅱ)_(0.3)Mn(Ⅳ)_(0.7)]O_2 as a new model material for anionic redox reaction

A new model material of Na[Mg(Ⅱ)Mn(Ⅳ)]O, with only Mgand Mnin the transition metal layers, is synthesized for the research of anionic redox reaction. The material delivers a capacity of ～130 mAh/g with a long plateau at ～4.2 V in the initial charge profile, indicating anionic redox reaction(ARR) involved during the initial desodiation process. In the following cycles, the reversible capacity can reach a high value of ～210 mAh/g, which is probably derived from the participation of both ARR and Mn/Mnredox couples, further proving the charge compensation from ARR during the initial charge and following cycles. The designed cathode material without Mnhelps avoid the influence of oxygen activity from transition metals, enabling the investigation of ARR without other distractions.

Optimizing medication strategies for liver cancer:unraveling the mechanisms of key drug combinations in the comprehensive guide to effective tumor prescriptions

This study delved into the formulaic patterns of liver cancer treatment outlined in“The Complete Book of Good Tumor Prescriptions”and explored the action mechanisms of core traditional Chinese medicine(TCM)combinations.Initially,liver cancer treatment formulas were extracted from the aforementioned book,and Excel 2017 was employed for calculating the frequency,properties,and meridians associated with the TCMs.IBM SPSS Modeler 18.0 was utilized for the analysis of TCM association rules,and Cytoscape 3.7.2 was employed for the visualization of these rules.Subsequently,network pharmacology was utilized to analyze the action mechanisms of core TCM combinations,leveraging TCMSP,TCMID,Genecards,DAVID,and other databases.The results revealed the inclusion of 131 prescriptions encompassing 303 TCMs.The core TCMs predominantly comprised those invigorating blood circulation and removing blood stasis,clearing heat,and tonifying deficiencies.The flavor of the TCMs was chiefly bitter or pungent,with a prevailing cold property entering the liver and spleen meridians.Association analysis indicated that the support of Angelicae sinensis radix-Trionycis carapax was the highest.Network pharmacology predictions indicated that Angelicae sinensis radix-Trionycis carapax possessed 20 target genes associated with anti-liver cancer properties,including IL-6,MAPK3,and SRC.Gene survival analysis demonstrated high expression of MAPK3 and SRC in liver cancer patients,correlating with a poor prognosis.KEGG analysis identified major anti-liver cancer pathways for Angelicae sinensis radix-Trionycis carapax,encompassing the cancer pathway,TNF signaling pathway,and prolactin signaling pathway.In summary,this study elucidated that TCMs for liver cancer treatment primarily consisted of invigorating blood circulation and removing blood stasis,antipyretic,and tonifying medicines.The core TCM pair,Angelicae sinensis radix-Trionycis carapax,appeared pivotal in this context.The underlying mechanism might involve the modulation of key genes,such as MAPK3 and SRC,and the regulation of pathways,including the cancer pathway,TNF signaling pathway,and prolactin signaling pathway.