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| 1 | Fast reconstructed and high-quality ghost imaging with fast Walsh-Hadamard transform显示文摘In this paper, we propose a ghost imaging scheme with fast Walsh–Hadamard transform, named GIFWHT. In the scheme, Walsh–Hadamard pattern pairs are used to illuminate an object to generate pairs of detection results, and the corresponding differential detection result is used as the result as that from the conventional bucket detector.By performing the fast Walsh–Hadamard transform on 2~k(k is a positive integer) differential detection results,the image of the object can be recovered. The experimental and numerical simulation results show that the reconstruction time of GIFWHT is greatly reduced, and the quality of the recovered image is noticeably improved. In addition, GIFWHT is robust against interference from environmental illumination and could save memory. | Le Wang Shengmei Zhao | 2016 | Photonics Research2016，4，6： | 22 |
| 2 | Efficient separating orbital angular momentum mode with radial varying phase显示文摘It is shown that orbital angular momentum(OAM) is a promising new resource in future classical and quantum communications. However, the separation of OAM modes is still a big challenge. In this paper, we propose a simple and efficient separation method with a radial varying phase. In the method, specific radial varying phases are designed and modulated for different OAM modes. The resultant beam is focused to the spots with different horizontal and vertical positions after a convex lens, when the coordinate transformation, including two optical elements with coordinate transformation phase and correct phase, operates on the received beam.The horizontal position of the spot is determined by the vortex phases, and the vertical position of the spot is dependent on the radial varying phases. The simulation and experimental results show that the proposed method is feasible both for separation of two OAM modes and separation of three OAM modes. The proposed separation method is available in principle for any neighboring OAM modes because the radial varying phase is controlled. Additionally, no extra instruments are introduced, and there is no diffraction and narrowing process limitation for the separation. | CHENG LI SHENGMEI ZHAO | 2017 | Photonics Research2017，5，4： | 7 |
| 3 | Multiple CRC-aided variable successive cancellation list decoder of polar codes显示文摘In order to change the path candidates, reduce the average list size, and make more paths pass cyclic redundancy check(CRC), multiple CRC-aided variable successive cancellation list(SCL) decoding algorithm is proposed. In the decoding algorithm, the whole unfrozen bits are divided into several parts and each part is concatenated with a corresponding CRC code, except the last part which is concatenated with a whole unfrozen CRC code. Each CRC detection is performed, and only those satisfying each part CRC become the path candidates. A variable list is setup for each part to reduce the time complexity. Variable list size is setup for each part to reduce the time complexity until one survival path in each part can pass its corresponding CRC. The results show that the proposed algorithm can reduce the average list size, and the frame error rate(FER) performance, and has a better performance with the increase of the part number. | Cao Miao Zhao Shuang Zhao Shengmei | 2017 | The Journal of China Universities of Posts and Telecommunications2017，24，2： | 4 |
| 4 | Multidimensional reconciliation protocol for continuous-variable quantum key agreement with polar coding显示文摘Continuous-variable quantum key distribution(CVQKD)[1-7]allows two remote parties(Alice and Bob)to share a secret key,even in the presence of an eavesdropper(Eve)with unlimited computational power[8-17].While,a highly efficient reconciliation protocol[18-21]is crucial in a | ShengMei Zhao ZhiGang Shen Hong Xiao Le Wang | 2018 | Science China(Physics,Mechanics & Astronomy)2018，61，9： | 3 |
| 5 | Nonorthogonal object identification based on ghost imaging显示文摘Ghost imaging could be used to make a quick identification of orthogonal objects by means of photocurrent correlation measurements. In this paper, we extend the method to identify nonorthogonal objects. In the method, an object is illuminated by one photon from an entangled pair, and the other one is diffracted into a particular direction by a pre-established multiple-exposure hologram in the idler arm. By the correlation measurements, the nonorthogonal object in the signal arm could be discriminated within a very short time. The constraints for the identification of nonorthogonal objects are presented, which show that the nonorthogonal objects can be discriminated when the overlapping portion between any two objects is less than half of all the objects in the set. The numerical simulations further verify the result. | Xiaofan Gu Shengmei Zhao | 2015 | Photonics Research2015，3，5： | 1 |
| 6 | The capacity of the quantum multiple bit-flip channel 显示文摘 | Zhang Guangqiang Zhao Shengmei | 2006 | Transaction of CCEIC2006，14，13： | 1 |
| 7 | Ghost edge detection based on HED network显示文摘In this paper,we present an edge detection scheme based on ghost imaging(GI)with a holistically-nested neural network.The so-called holistically-nested edge detection(HED)network is adopted to combine the fully convolutional neural network(CNN)with deep supervision to learn image edges efectively.Simulated data are used to train the HED network,and the unknown object’s edge information is reconstructed from the experimental data.The experiment results show that,when the compression ratio(CR)is 12.5%,this scheme can obtain a high-quality edge information with a sub-Nyquist sampling ratio and has a better performance than those using speckle-shifting GI(SSGI),compressed ghost edge imaging(CGEI)and subpixel-shifted GI(SPSGI).Indeed,the proposed scheme can have a good signal-to-noise ratio performance even if the sub-Nyquist sampling ratio is greater than 5.45%.Since the HED network is trained by numerical simulations before the experiment,this proposed method provides a promising way for achieving edge detection with small measurement times and low time cost. | Shengmei Zhao Yifang Cui Xing He Le Wang | 2022 | Frontiers of Optoelectronics2022，15，3： | 1 |
| 8 | Quantum neural network in speech recognition显示文摘 | FEI LI SHENGMEI ZHAO BAOYU ZHENG | 2002 | Signal Processing2002，2，： | 1 |
| 9 | Early development of xanthoma and coronary disease in a young female with homozygous familial hypereholesterolemia显示文摘 | Xin Zhao Liping Bu Shengmei Qin | 2014 | International Journal of Cardiology2014，1761，： | 1 |
| 10 | Nano Si preparation by constant cell voltage electrolysis of FFC-Cambridge Process in molten CaCl_2显示文摘Using FFC-Cambridge Process to prepare Si from SiO2 is a promising method to prepare nanostructured and highly pure silicon for solar cells.However,the method still has many problems unsolved and the controlling effect of the cell voltage on silicon product is not clear.Here we report in this article that nano cluster-like silicon product with purity of 99.95%has been prepared by complete conversion of raw material SiO2,quartz glass plate,using constant cell voltage electrolysis FFC-Cambridge Process.By analysis of XRD,EDS,TEM,HRTEM and ICP-AES as well as the discussion from the thermodynamics calculation,the morphology and components of the product based on the change of cell voltage are clarified.It is clear that pure silicon could be prepared at the cell voltage of 1.7 2.1 V in this reaction system.The silicon material have cluster-like structure which are made of silicon nanoparticles in 20 100 nm size.Interestingly,the cluster-like nano structure of the silicon can be tuned by the used cell voltage.The purity,yield and the energy cost of silicon product prepared at the optimized cell voltage are discussed.The purity of the silicon product could be further improved,hence this method is promising for the preparation of solar grade silicon in future. | Ji Zhao Shengmei Lu Linyan Hu Can Li | 2013 | Journal of Energy Chemistry2013，22，6： | 1 |
| 11 | HMIBase: An Hierarchical Indexing System for Storing and Querying Big Data显示文摘Relational database management systems are usually deployed on single-node machines and have strict limitations in terms of da-ta structure. This means they do not work well with big data, and No SQL has been proposed as a solution. To make data queryingmore efficient, indexes and memory cache techniques are used in No SQL databases. In this paper, we propose a hierarchical in-dexing mechanism and a prototype distributed data-storage system, called HMIBase, which has hierarchical indexes for non-prima-ry keys in tables and makes data querying more efficient. HMIBase uses HBase as the lower data storage and creates a memorycache for more efficient data transmission. HMIBase supports coprocessor-to-process update requests. It also provides a client withquery and update APIs and a server to support RPCs from the client and finish jobs. To improve the cache hit ratio, we propose amemory cache replacement strategy, called Hot Score algorithm, in HMIBase. The experimental results show that Hot Score algo-rithm is better than other cache-replacement strategies. | Shengmei Luo Di Zhao Wei Ge Rong Gu Chunfeng Yuan Yihua Huang | 2014 | ZTE Communications2014，12，4： | 0 |
| 12 | High efficiency Polar coding key reconciliation scheme in wireless channel显示文摘Recently, physical layer security in wireless communication system attracts much attention, and the reconciliation protocol plays an important role in the final secure key distillation, since the secret keys extracted from the realistic characteristics of the wireless channel may not be the same between the transmitter and legitimate receiver. A high efficiency Polar coding key reconciliation scheme is proposed in the paper to correct these errors. In the scheme, the transmitter generates a random stream with the known frozen bits and positions. After that, the transmitter encodes the random bit stream to a code stream by Polar encoding and sends the corrupted version of the code stream and the secret keys to the legitimate receiver. The receiver decodes the received stream with Polar successive cancellation decoding algorithm. With Polar encoding, the receiver obtains a random bit stream, and achieves the final secure key by XOR operator. The results show that the proposed scheme has a higher efficiency and a lower computational complexity, along with a high success rate. The consistency of the keys is very good after the reconciliation. | Zhang Xiaotian Zhao Shengmei | 2019 | The Journal of China Universities of Posts and Telecommunications2019，26，3： | 0 |
| 13 | A QUANTUM MULTIPLE ACCESS COMMUNICATIONS SCHEME USING ORBITAL ANGULAR MOMENTUM显示文摘We propose a quantum multiple access communications scheme using Orbital Angular Momentum (OAM) sector states in the paper. In the scheme, each user has an individual modified Poincare Bloch sphere and encodes his information with his own corresponding sector OAM states. A prepared entangled photon pairs are separated at transmitter and receiver. At the transmitter, each user encodes his information with the sector OAM states on the photons and the superposition of the different sector OAM states is carried by the photons. Then the photons are transmitted through quantum noiseless channel to the receiver. At the receiver, each user could retrieve his information by coincidently measuring the transmitted photons with the receiver side photons which are modulated by a special prepared measurement basis. The theoretical analysis and the numerical simulations show that each user could get his information from the superposition state without error. It seems that this scheme provides a novel method for quantum multiple users communications. | Dong Xiaoliang Zhao Shengmei Zheng Baoyu | 2013 | Journal of Electronics(China)2013，30，2： | 0 |
| 14 | Cloud Computing Technology and Its Applications显示文摘Virtualization and distributed parallel architecture are typical cloud computing technologies. In the area of virtualization technology, this article discusses physical resource pooling, resource pool management and use, cluster fault location and maintenance, resource pool grouping, and construction and application of heterogeneous virtualization platforms. In the area of distributed technology, distributed file system and Key/Value storage engine are discussed. A solution is proposed for the host bottleneck problem, and a standard storage interface is proposed for the distributed file system. A directory-based storage scheme for Key/Value storage engine is also proposed. | Zhao Pei, Lu Ping, Luo Shengmei (ZTE Corporation, Nanjing 210012, P. R. China) | 2010 | ZTE Communications2010，8，4： | 0 |
| 15 | High-performance broadband flexible photodetector based on Gd_(3)Fe_(5)O_(12)-assisted double van der Waals heterojunctions显示文摘Flexible photodetectors are fundamental components for developing wearable systems,which can be widely used for medical detection,environmental monitoring and flexible imaging.However,compared with 3D materials,lowdimensional materials have degraded performance,a key challenge for current flexible photodetectors.Here,a highperformance broadband photodetector has been proposed and fabricated.By combining the high mobility of graphene(Gr)with the strong light–matter interactions of single-walled carbon nanotubes(SWCNTs)and molybdenum disulfide(MoS2),the flexible photodetector exhibits a greatly improved photoresponse covering the visible to near-infrared range.Additionally,a thin layer of gadolinium iron garnet(Gd_(3)Fe_(5)O_(12),GdlG)film is introduced to improve the interface of the double van der Waals heterojunctions to reduce the dark current.The SWCNT/GdIG/Gr/GdIG/MoS2 flexible photodetector exhibits a high photoresponsivity of 47.375 A/W and a high detectivity of 1.952×1012 Jones at 450 nm,a high photoresponsivity of 109.311 A/W and a high detectivity of 4.504×10^(12) Jones at 1080 nm,and good mechanical stability at room temperature.This work demonstrates the good capacity of GdIGassisted double van der Waals heterojunctions on flexible substrates and provides a new solution for constructing high-performance flexible photodetectors. | Ze Zhang Peirui Ji Shaobo Li Fei Wang Shengmei He Yiwei Cheng Shuhao Zhao Kaili Li Xiaomin Wang Yu Wang Shuming Yang | 2023 | Microsystems & Nanoengineering2023，9，4： | 0 |
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