基于变分量子虚时演化和UCC Ansatz的基态求解器

对于量子多体体系,其基态的求解十分重要。变分量子本征求解器VQE是一种基于量子计算的变分基态求解算法,由于其需要结合量子电路和经典的变分算法,使得量子电路的复杂性和变分算法的有效性显得极其重要。针对量子分子体系,提出了一种变分基态求解器。运用单电子约化密度矩阵分析得到在自然分子轨道表象下的电子轨道占据数,根据占据数大小简化了体系哈密顿量和相应的UCC ansatz线路。并运用变分量子虚时演化算法替代VQE中常用的梯度算法,因此不易受到参数空间的梯度分布的影响,使得变分过程收敛更快,更具鲁棒性。

状态空间非线性约束的完整性与轨道性质

以位形空间和状态空间之间的轨道映射为基础概念，建立了状态空间非线性约束完整性的直接定义，并证明了有关轨道性质的基本定理．

Computer aided stitching approach for dental restoration models

According to the bio-characteristics of the lower and upper cavity surfaces of dental restoration, a stitching approach is proposed based on a virtual zipper working mechanism and a minimization of the surface total curvature energy, which is used to resolve the stitching problems existing during computer-aided design for dental restorations. First, the two boundaries corresponding to the lower and upper surfaces are triangulated based on the zipper working mechanism to generate the initial stitching surface patch, of which the edges are distributed uniformly between the boundaries. Secondly, the initial stitching surface patch is subdivided and deformed to reconstruct an optimized surface patch according to the bio-characteristics of the teeth. The optimized surface patch is minimally distinguishable from the surrounding mesh in smoothness and density, and it can stitch the upper and lower cavity surfaces naturally. The experimental results show that the dental restorations obtained by the proposed method can satisfy both the shape aesthetic and the fitting accuracy, and meet the requirements of clinical oral medicine.

High-resolution frequency-domain Radon transform and variable-depth streamer data deghosting

Receiver ghost reflections adversely affect variable-depth streamer （VDS） data acquisition. In addition, the frequency notches caused by the interference between receiver ghosts and primary waves strongly affect seismic data processing and imaging. We developed a high-resolution Radon transform algorithm and used it to predict receiver ghosts from VDS data. The receiver ghost reflections are subtracted and removed from the raw data. We propose a forward Radon transform operator of VDS data in the frequency domain and, based on the ray paths of the receiver ghosts, we propose an inverse Radon transform operator. We apply the proposed methodology to model and field data with good results. We use matching and subtracting modules of commercially available seismic data processing software to remove the receiver ghosts. The frequency notches are compensated and the effective frequency bandwidth of the seismic data broadens.

Detection and correction of level echo based on generalized S-transform and singular value decomposition

The echo of the material level is non-stationary and contains many singularities.The echo contains false echoes and noise,which affects the detection of the material level signals,resulting in low accuracy of material level measurement.A new method for detecting and correcting the material level signal is proposed,which is based on the generalized S-transform and singular value decomposition(GST-SVD).In this project,the change of material level is regarded as the low speed moving target.First,the generalized S-transform is performed on the echo signals.During the transformation process,the variation trend of window of the generalized S-transform is adjusted according to the frequency distribution characteristics of the material level echo signal,achieving the purpose of detecting the signal.Secondly,the SVD is used to reconstruct the time-frequency coefficient matrix.At last,the reconstructed time-frequency matrix performs an inverse transform.The experimental results show that the method can accurately detect the material level echo signal,and it can reserve the detailed characteristics of the signal while suppressing the noise,and reduce the false echo interference.Compared with other methods,the material level measurement error does not exceed 4.01%,and the material level measurement accuracy can reach 0.40%F.S.

Office Channeling and Its Impact on the Growth of Indonesian Islamic Banking Industry

The purpose of this paper is to analyze that the office channeling policy that based on Bank Indonesia＇s rule No. 8/3/PBI/2006 had an impact on the growth of Islamic banking industry in Indonesia. This research used ordinary least square regression to analyze the impact of office channeling policy on the growth of Indonesian Islamic banking industry. The variable used in this paper is office channeling which is used as a dummy variable, and margin deposit and non-performing financing （NPF） are also used as control variables. The indicators of the growth of Indonesian Islamic banking industry are asset and third-party funds. The result shows that office channeling does not have an impact on the growth of Islamic banking industry which is measured by asset growth and third-party funds growth. According to this result, Bank Indonesia should have an innovative policy to stimulate the Islamic banking industry growth in Indonesia.