Fixed-scale speckles are used in existing ghost imaging system, while the current instrument can achieve multi-scale speckles ghost imaging. It focuses on the research of compressed sensing ghost imaging system using multi-scale speckles. Through the computer simulation and using the four resolution scales’ image as the original image, restored images were obtained to analyse a variety of different scales and different proportion of speckle cases. The results show that the compressed sensing ghost imaging system using multi-scale speckles can obtain image which is close to the true value. And when the small scale speckles occupy large proportion, the recovered image resolution is not disturbed.

In order to improve the performance of patch prior based natural image restoration, and effectively remove the noise and blur of images, a restoration framework of expected patch log likelihood (EPLL) using spatially constrained Gaussian mixture model was presented. Based on the spatial distribution information of patches, the priors were defined using the spatially constrained Gaussian mixture statistical characteristics. Image restoration was realized based on the global optimization of image patch restoration. Compared with related works, the proposed method performed better in image denoising and deblurring, and preserved details. The performance of the restoration results was evaluated by the objective indicator. The experimental results show that the proposed method is effective and the visual effect of the image restoration is pleased.

Effective phase compensation of the incomplete single and double frequency signal was investigated effectively. The necessary condition for exact phase compensation of signal was deduced and testified theoretically. That is, exact phase compensation can be executed for the incomplete single frequency unconditionally. And it can be executed for the incomplete double frequency on condition of that the multiply of difference from the two frequencies of the signal and sampling time interval is an integer. Because the exact phase compensation can’t be carried out, the approximate compensation method based on waveform evaluation criterion was proposed. By simulation, the different compensation effects based on four different criterions were compared. The results proved that the deduced theory and proposed method are valid, and the compensation effect based on waveform exponent entropy or energy contrast criterion is better than that of other, and the peak of frequency spectrogram is higher than that of other.

Multi-frame blind deconvolution algorithm using multi-frame degraded images can get the information of clear original image and point spread functions, which was concerned by many researchers. At present, the majority of multi-frame blind deconvolution algorithms needed registration pretreatment for multi-frame images to eliminate the restored image error. Multi-frame blind deconvolution algorithm in frequency domain was proposed to process the degraded images without registration and though expanding point spread functions’ support domain. The feasibility of this method was illustrated by the properties of the Fourier transform. The digital simulation experiments were carried out to confirm the effectiveness of the proposed method.

To construct the new infinite sequence soliton-like solutions of the (2+1)-dimension general Calogero-Bogoyavlenskii-Schiff system, the new auxiliary equation that can be changed to the Riccati equation and its new solutions were presented. The new solutions, Bcklund transformation, and the nonlinear superposition formula of solutions of the Riccati equation were presented. Based on these solutions and with the help of Mathematica, the new infinite sequence soliton-like solutions of the (2+1)-dimension general Calogero-Bogoyavlenskii-Schiff system were constructed. The solutions are consisted of exponential function, trigonometric function and rational function.

By using the improved CK’s method, the relation between the generalized Kuramoto-Sivashinsky equation with variable coefficient and the corresponding coefficient was obtained. Some new exact solutions of the corresponding constant coefficient equation were obtained by applying the Lie group method, and then achieved the explicit solutions of the generalized Kuramoto-Sivashinsky equation with variable coefficients.

In order to solve nonlinear evolution equations including the equation with variable coefficients, diversity of the auxiliary equation and the more general form of solution were explored. The (G′/G)-expansion method proposed by Wang Mingliang was extended further. It’s used to the deformation Boussinesq equations II of constant coefficient to verify the validity of this promotion. Many kinds of exact travelling wave solutions were obtained. The results show that this promotion has good applicability.

In quantum information science, quantum cloning theory is a basic one that provides an absolute security of quantum cryptography. The explicit transformation of the optimal 1→M=d+1 phase-covariant quantum cloning in d dimensions was derived and then this kind of cloning machine to the 1→M=kd+1 (for integer k) case was generized and the explicit transformation was obtained. By exploiting the formulation of the nonoptimal 2→M=2k+1 phase-covariant quantum cloning in 2 dimensions, the optimal cloning transformation was derived. The copy fidelities of the two kinds of cloning machines are coincident with the theoretical values found.

The typical noise in the multiplexed system based on dense wavelength division multiplexing (DWDM) was analyzed, and the scheme of multiplexed classical and quantum transmission system was proposed with a heralded single-photon source. Compared to weakly coherent pulses, the threshold-detection can be accurately controlled, and temporal-filtering can be achieved to reduce the noise jamming. On the other hand, the opening time of APD can be controled to avoid the noise and dark counts. The simulation results showed that the scheme of multiplexed classical and quantum transmission system can depress the impact of various noise, reaching the threshold of bit error rate at a farther distance compared to a weak coherent source. So the secure communication distance is increased in remote quantum key distribution communications.

A quantum key distribution protocol based on BB84 protocol and a challenge-response mechanism was proposed. Through a secure channel, Alice and Bob have pre-shared three different Hash functions (denoted by H1, H2 and H3) and a random bit string SAB0. Every time, Alice first generates two random bit strings SAr (challenge) and SAk (key), then prepares a photon sequence SAp based on BB84 protocol using SBr,SBk,SAB0 and H1. Alice sends SAr and SAp to Bob and Bob receives the corresponding SBr and SBp. Bob measures SBp according to BB84 protocol and gets corresponding SBk. In the ideal case, SAk should be the same as SBk. Bob uses SBr,SBk,SAB0 and H2 to generate SB2 (response). At last, Alice and Bob use their own sequences and H3 to generate S~A0 and S~B0 respectively, then they update their own SAB0. In the proposed protocol, the utilization rate of photons is 100%. The security of the protocol is similar as that of the BB84 protocol. Furthermore, it is a one-way identification authentication protocol.

The diversity of quantum coding was expounded. Heuristic function in quantum-inspired computation for 8-puzzle was analyzed. A quantum-inspired algorithm and computing strategies based on heuristic function were presented. Quantum counter and unitary transformation operation were used to complete quantum computing for 8-puzzle problem, and quantum counter was set to maximum extension depth value. Quantum-inspired algorithm was compared with the classical algorithm. Finally, how to implement a quantum computer for the heuristic intelligent search was discussed further.

When a data frame is lost or corrupted during transmission, the solution adopted by the stop- and-wait protocol of the data-link layer is overtime retransmission. An improved algorithm was proposed by utilizing the correlation in quantum entanglement and instantaneous transmission of quantum teleportation. When something wrong happened during the data transmission, the algorithm sends negative frame and the acknowledgement frame instantaneously, which reduces the minimum time interval between two successful data frame transmission. Compared with the classical stop-and-wait algorithm, quantitative analysis illustrates that our algorithm improves the data frame transmission efficiency.

The photonic lattice induced by nondiffracting discrete beam was observed in an externally biased cerium doped strontium barium niobate(SBN) photorefractive crystal. And the photonic lattice induced by the interference of three beams and six beams was observed especially. Some differences and similarities of the photonic lattice in these two cases were analyzed by far-field diffraction pattern, Brillouin-zone spectroscopy and Fourier spatial spectrum. And some theoretical analysis were carried out. The results show that the photonic lattice induced by the interference of three beams is more uniform and stable. In addition, the transmission diagrams of the photonic lattice induced by the interference of four beams, five beams, seven beams, eight beams, nine beams and ten beams were simulated respectively.

Based on Faraday effect, miniature and agile magnetic field sensor were demonstrated by using a dual-polarization fiber grating laser. To develop suitable package to optimize the sensitivity for magnetic field, it is necessary to investigate the spatial response of a dual-polarization fiber grating laser to magnetic field. Experiment measurements for the longitudinal spatial response to magnetic field were performed on a fiber grating laser with a length of 21 mm in magnetic fields of 0.5 T, 0.75 T and 1 T and field widths of 3 mm, 5 mm and 7 mm. It shows that the spatial response is not uniform along the longitudinal direction of the dual-polarization fiber grating laser. The spatial response peaks appear at the center of the laser cavity and show as a symmetric Gaussian distribution along the longitudinal direction of the laser. Such distribution characteristics of the spatial response are related to the distributed Bragg reflecting.

An investigation on the local magnetization processes within patterned permalloy films was performed by means of focused magneto-optic Kerr effect (MOKE) measurements, from which local magnetic hysteresis loops of the individual elements are found to be dependent on the shape and separation between the individuals as well as the position in the array. For the rectangular elements, the easy magnetization axis is along the length of element and the hard axis is along width of element. The shape anisotroy increases with increasing the length to width aspect ratio. When the separation between elements is larger than the element size, positions of elements in the array are relatively less influential on the behaviour of the magnetic hysteresis loops which are just the contribution of an individual element. When the separation between elements is close to the element size, the magnetic anisotropy shown in the magnetic Kerr loops is affected by the element position indicating that the magnetic interaction should be taken into account.

In order to find out the rule for temperature of mechanical heart valves to influence diamond like carbon (DLC) film, the DLC films were deposited on mechanical heart valves by the pulsed laser deposition while the temperature of the mechanical heart valve were kept chamber temperature and 150°C respectively and other experimental conditions unchangeable. The microstructure of the film was detected by the visible Raman spectroscopy. The topography and roughness of the film were detected by the atomic force microscopy (AFM). The experimental results demonstrate that when the temperature of the mechanical heart valve increases from chamber temperature to 150°C, change of the film microstructure would not be obvious. The roughness of film surface would reduce. The diamond like carbon film would exhibit strong adhesion to mechanical heart valve.

The effects of temperature and electron-phonon coupling strength on vibrational frequency, effective confinement length, ground state energy and ground state binding energy of strong-couping polaron in a parabolic quantum wire were investigated by using linear combination operator and unitary transformation methods. It’s found that vibrational frequency, ground state energy and ground state binding energy of the strong-coupling polaron increase with the increasing of temperature. The effective confinement length increases with the increasing of temperature and electron-phonon coupling strength. But when temperature reaches a certain level, with increasing of temperature, the electron-phonon coupling strength will decrease.

With development of the solid state light source, the high power LED was widely applied in the illumination. The indoor visible light communication system has broad application combining both the illumination and communication. In order to meet the requirement of indoor illumination and communication, a full duplex communication system was structured by designing the transmitter, receiver and interface module based on the intensity modulation and direct detection modulation. The channel model was analyzed. The actual intensity distribution and the reliable communication distance of the one-way link were measured. The experiment proved the feasibility and reliability of the system.

A high precision temperature control system of excimer laser was proposed. The system can sample the temperature of the chamber of excimer laser in real time, and then display and control it. So the constant temperature of excimer laser chamber can be achieved which can improve the working performance of the excimer such as energy stability and working life. The system used Freescale chip as controller, and proportional valve as its executive component. Meanwhile, the software, hardware and optimization control algorithm were designed. Experimental results show that under the three different PID control ways, the control precision of the system is ±0.2°C. Under the improved intelligent control, system overshoot is smaller and response time is reduced. At the pulse rate of 100 Hz and 500 Hz, the system can run steadily. So the system can provide a favorable temperature environment for the laser’s operation.