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A novel quantum information hiding protocol based on entanglement swapping of high-level Bell states

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Chinese Physics B 2015年第5期24卷 231-238页

作者：徐淑奖陈秀波王连海钮心忻杨义先 Shandong Provincial Key laboratory of Computer Networks Shandong Computer Science Center (National Supercomputer Center in Jinan) information Security center State Key Laboratory of Networking and Switching TechnologyBeijing University of Posts and Telecommunications State Key laboratory of information Security Institute of Information Engineering Chinese Academy of Sciences

Using entanglement swapping of high-level Bell states, we first derive a covert layer between the secret message and the possible output results of the entanglement swapping between any two generalized Bell states, and then propose a novel high-efficiency quantum information hiding protocol based on the covert layer. In the proposed scheme, a covert channel can be built up under the cover of a high-level quantum secure direct communication （QSDC） channel for securely transmitting secret messages without consuming any auxiliary quantum state or any extra communication resource. It is shown that this protocol not only has a high embedding efficiency but also achieves a good imperceptibility as well as a high security.

关键词： quantum information hiding quantum covert'channel entanglement swapping high-level Bell states

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Effects of disinhibition on spatiotemporal pattern of neuronal first recruitment in neuronal networks

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Progress in Natural science:Materials International 2009年第5期19卷 615-621页

作者： Liangbin Pana,b,c,1, Xindong Songa,b,c,1, Guangxin Xiang a,b,c, Jing Zhua,b,c, Jing Cheng a,b,c,d,a Medical Systems Biology Research center, tsinghua University School of Medicine, Beijing {2., china b Department of Biological sciences and Biotechnology, tsinghua University, Beijing {2., china c national Engineering Research center for Beijing Biochip technology, 18 Life science Parkway, Beijing 102.06, china d State Key laboratory of Biomembrane and Membrane Biotechnology, tsinghua University, Beijing {2., china [a]Medical Systems Biology Research center Tsinghua University School of Medicine Beijing 100084 China [b]Department of Biological Sciences and Biotechnology Tsinghua University Beijing 100084 China [c]National Engineering Research Center for Beijing Biochip Technology 18 Life Science Parkway Beijing 102206 China [d]State Key Laboratory of Biomembrane and Membrane Biotechnology Tsinghua University Beijing 100084 China

The propagation of neuronal activities is a key feature to understanding information processing in networks. The analysis based on first-spikes of bursts in turn plays an important role in the research of neuronal activity propagation. Our focus here is to investigate how spatiotemporal patterns of neuronal first-spikes are affected by disinhibition. Multi-electrode arrays were used to record stimulation-evoked bursts of multiple neurons in randomly cultured neuronal networks. Both the precise timing of and the rank relationships between first-spikes were analyzed. Compared with evoked bursts in the network’s native state, the precise first-spike latencies in its dis-inhibited state are more consistent and the propagation of its bursting activities is much faster. Additional points of interest are that disinhibited neuronal networks can be evoked to generate stable and distinguishable neuronal first recruitment spatiotemporal patterns specific to the stimulation site, and that the disinhibition may cause the original spatiotemporal patterns to change in a heterogeneous manner with regards to different propagation pathways.

关键词： Neuronal recruitment Spatiotemporal pattern Disinhibition Network Multi-electrode array

Modeling Sound Changes in Mandarin Spontaneous Speech Using Deleted Interpolation of Mixture Component Weights

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Modeling Sound Changes in Mandarin Spontaneous Speech Using ...

Data fusion for target tracking in wireless sensor networks using quantized innovations and Kalman filtering

第九届全国人机语音通讯学术会议

作者： LIU Yi1,HE Lei2. ZHENG Fang1 1. center for Speech and Language technology, Division of Technical Innovation and Development{2., Beijing 2. Toshiba (china) Research and Development center, Beijing

The high error rate of recognition accuracy in spontaneous speech is due in part to the poor modeling of pronun-ciations variations. An analysis of the acoustic data reveals that the variations include both phone changes and sound changes. Sound changes are the variations within the phoneme, such as nasalization, centralization, voiceless, voiced, etc. Sound changes are flexible and include diacritics that have to be explicitly hand-labeled by linguists. Annotating such corpus is time consuming and the available hand-labeled samples of sound changes are very limited. In this paper, based on standard phonetic unit inventory, we use dynamic programming alignment together with data-driven method to extend the phone set automatically for sound change description. We propose using deleted interpolation to interpolate baseline models and the more refined, but less well-trained sound change models, with the goal of improving the robust ability of sound change models to cover the diversity of sound variations in spontaneous speech. The effectiveness of this approach is evaluated on the 1997 Hub4NE Mandarin Broadcast News Corpus （1997 MBN） with different styles of speech. It gives a significant 1.98% absolute syllable error rate reduction in spontaneous speech. Additional 1.04% absolute syllable error rate reduction is achieved compared to Gaussian mixture sharing method.

关键词： Sound Changes Deleted Interpolation Hand-labeled

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science china({2. sciences) 2012年第3期55卷 530-544页

作者： XU Jian1,2., LI JianXun1,2.& XU Sheng3 1Department of Automation, science and technology on Avionics Integration {2., Shanghai Jiao Tong University, Shanghai 2.02.0, china 2.epartment of Automation, System Control and information Processing, Ministry of Education of china, Shanghai Jiao Tong University, Shanghai 2.02.0, china 3School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 2.02.0, china 1. Department of Automation Science and Technology on Avionics Integration Laboratory Shanghai Jiao Tong University Shanghai 200240 China2. Department of Automation System Control and Information Processing Ministry of Education of China Shanghai Jiao Tong University Shanghai 200240 China3. School of Mechanical Engineering Shanghai Jiao Tong University Shanghai 200240 China

A novel networked data-fusion method is developed for the target tracking in wireless sensor networks (WSNs). Specifically, this paper investigates data fusion scheme under the communication constraint between the fusion center and each sensor. Such a message constraint is motivated by the bandwidth limitation of the communication links, fusion center, and by the limited power budget of local sensors. In the proposed scheme, each sensor collects one noise-corrupted sample, performs a quantizing operation, and transmits quantized message to the fusion center. Then the fusion center combines the received quantized messages to produce a final estimate. The novel data-fusion method is based on the quantized measurement innovations and decentralized Kalman filtering (DKF) with feedback. For the proposed algorithm, the performance analysis of the estimation precision is provided. Finally, Monte Carlo simulations show the effectiveness of the proposed scheme.

关键词： data fusion target tracking limited bandwidth quantized innovation Kalman filtering

Monaural voiced speech segregation based on elaborate harmonic grouping strategies

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science china({2. sciences) 2011年第12期54卷 2491-2500页

作者： LIU WenJu 1 , ZHANG XueLiang 1 , JIANG Wei 1 , LI Peng 2.& XU Bo 2.1 national laboratory of Pattern Recognition, Institute of Automation, Chinese Academy of {2.s, Beijing 100190, china 2.Digital Media Content technology Research center, Institute of Automation, Chinese Academy of {2.s, Beijing 100190, china 1. national laboratory of Pattern Recognition Institute of Automation Chinese Academy of Sciences Beijing 100190 China2. Digital Media Content Technology Research Center Institute of Automation Chinese Academy of Sciences Beijing 100190 China

In this paper, an enhanced algorithm based on several elaborate harmonic grouping strategies for monaural voiced speech segregation is proposed. Main achievements of the proposed algorithm lie in three aspects. Firstly, the algorithm classifies the time-frequency (T-F) units into resolved and unresolved ones by carrier-to-envelope energy ratio, which leads to more accurate classification results than by cross-channel correlation. Secondly, resolved T-F units are grouped together according to minimum amplitude principle, which has been verified to exist in human perception, as well as the harmonic principle. Finally, "enhanced" envelope autocorrelation function is employed to detect amplitude modulation rates, which helps a lot in reducing half-frequency error in grouping of unresolved units. Systematic evaluation and comparison show that performance of separation is greatly improved by the proposed algorithm. Specifically, signal-to-noise ratio (SNR) is improved by 0.96 dB compared with that of previous method. Besides, our algorithm is also effective in improving the PESQ score and subjective perception score.

关键词： computational auditory scene analysis voiced speech separation harmonistic principle minimum amplitude principle elaborate harmonic grouping strategies

Association between ICU quality and in-hospital mortality of V-V ECMO-supported patients—the ECMO quality improvement action(EQIA)study:a national cohort study in china from 2.17 to 2.19

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Frontiers of Medicine 2024年第2期18卷 315-326页

作者： Wei Cheng Jieqing Chen Xudong Ma Jialu Sun Sifa Gao Ye Wang Longxiang Su Lu Wang Wei Du Huaiwu He Yujie Chen Zunzhu Li Qi Li Jianhua Sun Hongbo Luo Jinbang Liu Guangliang Shan Bing Du Yanhong Guo Dawei Liu Chang Yin Xiang Zhou on behalf of the china national Critical Care Quality Control {2.-the ECMO quality improvement action(EQIA)study Department of Critical Care Medicine State Key Laboratory of Complex Severe and Rare DiseasesPeking Union Medical College HospitalChinese Academy of Medical Science and Peking Union Medical CollegeBeijing100730China information center Department/Department of information Management State Key Laboratory of Complex Severe and Rare DiseasesPeking Union Medical College HospitalPeking Union Medical College&Chinese Academy of Medical SciencesBeijing100730China Department of Medical Administration National Health Commission of the People’s Republic of ChinaBeijing100044China School of Population Medicine and Public Health Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing100730China Department of Epidemiology and Biostatistics Institute of Basic Medicine SciencesChinese Academy of Medical Sciences(CAMS)&School of Basic MedicinePeking Union Medical CollegeBeijing100730China national Institute of Hospital Administration National Health Commission of the People’s Republic of ChinaBeijing100044China 不详

This cohort study was performed to explore the influence of intensive care unit(ICU)quality on in-hospital mortality of veno-venous(V-V)extracorporeal membrane oxygenation(ECMO)-supported patients in *** study involved all V-V ECMO-supported patients in 318 of 1700 tertiary hospitals from 2.17 to 2.19,using data from the national Clinical Improvement System and china national Critical Care Quality Control *** quality was assessed by quality control indicators and capacity *** the 2.63 V-V ECMO-supported patients in 318 hospitals,a significant correlation was found between ECMO-related complications and *** reintubation rate within 48 hours after extubation and the total ICU mortality rate were independent risk factors for higher in-hospital mortality of V-V ECMO-supported patients(cutoff:1.5%and 7.0%;95%confidence interval:1.05–1.48 and 1.04–1.45;odds ratios:1.2. and 1.2.;P=0.012.and P=0.015,respectively).Meanwhile,the V-V ECMO center volume was a protective factor(cutoff of≥50 cases within the 3-year study period;95%confidence interval:0.57–0.83,odds ratio:0.69,P=0.0001).The subgroup analysis of 864 patients in 11 high-volume centers further strengthened these ***,ICU quality may play an important role in improving the prognosis of V-V ECMO-supported patients.

关键词： veno-venous extracorporeal membrane oxygenation in-hospital mortality high-volume centers quality control intensive care unit capacity parameters

Key technologies for solid state lighting

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Key technologies for solid state lighting

Simpler criterion and flexibility of operation complexity for perfectly teleporting arbitrary n-qubit state with 2.-qubit pure state

国际纳光电子学研讨会

作者： Yi Luo~(1 2. Yanjun Han~1 Keyuan Qian~2.(1)State Key laboratory on Integrated Optoelectronics/tsinghua {2. laboratory for information science and technology tsinghua University Beijing china 100084. (2.Semicondutor Lighting Lab Graduate School at Shenzhen tsinghua University Shenzhen china 518055

＜正＞The latest development of the key technologies including improvement of the intemal quantum efficiency and external quantum efficiency of the high-power GaN-based LEDs,packaging and system application was review...

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science china(Physics,Mechanics & Astronomy) 2010年第11期53卷 2069-2073页

作者： ZUO XueQin 1,LIU YiMin 2.ZHANG ZiYun 1,ZHANG Wen 1 & ZHANG ZhanJun 1 1 Key laboratory of Optoelectronic information Acquisition & Manipulation of Ministry of Education of{2.,School of Physics & Material science,Anhui University,Hefei 2.0039,china 2.Department of Physics,Shaoguan University,Shaoguan 512.05,china 1. Key laboratory of Optoelectronic information Acquisition & Manipulation of Ministry of Education of{2. School of Physics & Material Science Anhui University Hefei 230039 China2. Department of Physics Shaoguan University Shaoguan 512005 China

A criterion for whether a pure-state quantum channel consisting of 2. qubits averagely distributed between two nodes can be used for perfectly teleporting an arbitrary n-qubit state via Bell-state measurements is ***,a matrix is composed of the coefficients of the known channel state and whether the matrix is unitary decides the *** the criterion is apparently different from the usual standard entanglement criterion (USEC),its applicability is enlarged and verified by other measuring *** analyses have further simplified the resultant criterion,so that a much simpler criterion than the USEC is conclusively ***,the flexibility of operation complexity between the non-unitary measurements and the unitary reconstructions is explicitly exhibited.

关键词： quantum teleportation criterion flexibility of operation complexity measuring bases reconstruction

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Effcient generation of multi-photon W states by joint-measurement

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Progress in Natural science:Materials International 2008年第1期 119-122页

作者： Wenhu Xu a ,Xin Zhao a ,Guilu Longa ,b,* aKey laboratory for Atomic and Molecular Nanosciences and Department of Physics,{2. University,Beijing 100084,china b{2. national laboratory for information science and technology,{2. University,Beijing 100084,china

We propose an effcient scheme to generate multi-photon entangled W state from two-qubit Einstein–Podolsky–Rosen pairs by mea- surements and follow-up local *** discuss the effciency of the scheme under realistic con... 详细信息

关键词： W-state quantum entanglement Multi-photon W-state generation