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Channel＇s Concurrence and Quantum Teleportation

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Communications in Theoretical Physics 2005年第1期43卷 55-58页

作者： LINGYin-sheng DepartmentofPhysics SuzhouUniversitySuzhou215006China

Concurrence can measure the entanglement property of a system. If the channel is a pure state, positive concurrence state can afford the good performance in the teleportation process. If the channel ia a mixed state, positive concurrence state cannot assure the good performance in the teleportation. The conditions of the positive concurrence and the quantum teleportation in the Heisenberg spin ring is derived.

关键词： concurrence quantum telportation entanglement mixed state heisenberg spinring

Kinetic Factors for Intensive Reaction of Magnesium-Based Spheroidiser in Hot Metal

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Journal of Iron and Steel Research International 2005年第1期12卷 9-11页

作者： sheng Da Tsinghua University

The spheroidiser is a necessary additive to manufacture ductile *** with the same hot metal,spheroidisers and treated technology,reactions differ greatly from each *** reaction may be quite normal in one case,but very intensive for another *** effects of kinetic factors such as size,surface area and morphology o f spheroidiser on the reaction of spheoidization are studied.

关键词： hot metal kinetic factor diffusion rate intensive reaction spheroidiser magnesium

INFLUENCE OF OCEAN INTERNAL WAVE ON PROPAGATION OF UNDER-WATER RADIATION NOISE

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Journal of Hydrodynamics 2004年第1期16卷 61-66页

作者： YEChun-sheng shenguo-guang SchoolofCivilEngineering TianjinUniversityTianjin300072China

The underwater acoustic field influenced by a selected ocean internal wavewas computed using the Parabolic Equation (PE) method and split-step difference algorithm in thispaper. Acoustic field is formed by sound source with different frequency covering the range ofradiation noise of ships and submarines. Owing to the adoption of complex variables, sparse matrix,Gaussian source and analysis on the grid size, numerical results are achieved smoothly. The resultsshow that internal wave''s influence on underwater sound can''t be neglected, especially for highersound frequency. So it'' s necessary to take internal wave into account in identifying radiationnoise of ships and submarines, namely for sound intensity, transmission loss and spectra shape.

关键词： ocean internal wave underwater acoustics radiation noise parabolicequation (PE) method

Photometric redshifts of galaxies from SDSS and 2MASS

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Chinese Journal of Astronomy and Astrophysics 2009年第4期9卷 390-400页

作者： Tao Wang Jia-sheng Huang Qiu-sheng Gu Department of Astronomy Nanjing University Nanjing 210093 China Harvard-Smithsonian Center for Astrophysics 60 Garden Street Cambridge MA 02138

In order to find the physical parameters which determine the accuracy of pho- tometric redshifts, we compare the spectroscopic and photometric redshifts （photo-z＇s） for a large sample of -80000 SDSS-2MASS galaxies. Photo-z＇s in this paper are estimated by using the artificial neural network photometric redshift method （ANNz）. For a subset of -40000 randomly selected galaxies, we find that the photometric redshift recovers the spectroscopic redshift distribution very well with rms of 0.016. Our main results are as follows：（1） Using magnitudes directly as input parameters produces more accurate photo-z＇s than using colors; （2） The inclusion of 2MASS （J, H, Ks） bands does not improve photo-z＇s significantly, which indicates that near infrared data might not be important for the low-redshift sample; （3） Adding the concentration index （essentially the steepness of the galaxy brightness profile） as an extra input can improve the photo-z＇s estimation up to -10 percent; （4） Dividing the sample into early- and late-type galaxies by using the concentration index, normal and abnormal galaxies by using the emission line flux ratios, and red and blue galaxies by using color index （g - r）, we can improve the accuracy of photo-z＇s significantly; （5） Our analysis shows that the outliers （where there is a big difference between the spectroscopic and photometric redshifts） are mainly correlated with galaxy types, e.g., most outliers are late-type （blue） galaxies.

关键词： galaxies distances and redshifts-methods statistical-techniques pho-tometric

Prospects for the application of transcranial magnetic stimulation in diabetic neuropathy

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Neural Regeneration Research 2021年第5期16卷 955-962页

作者： Xi Xu Dong-sheng Xu Department of Rehabilitation Medicine Affiliated Hospital of Nantong UniversityNantongJiangsu ProvinceChina Department of Rehabilitation Medicine Yueyang Hospital of Integrated Traditional Chinese and Western MedicineShanghaiChina School of Rehabilitation Science Shanghai University of Traditional Chinese MedicineShanghaiChina

Encouraging results have been reported for the use of transcranial magnetic stimulationbased nerve stimulation in studies of the mechanisms of neurological regulation,nerve injury repair,and nerve ***,to date,there are only a few reviews on the use of transcranial magnetic stimulation for diabetic *** with diabetic neuropathy vary in disease progression and show neuropathy in the early stage of the disease with mild symptoms,making it difficult to screen and *** the later stage of the disease,irreversible neurological damage occurs,resulting in treatment *** this review,we summarize the current state of diabetic neuropathy research and the prospects for the application of transcranial magnetic stimulation in diabetic *** review significant studies on the beneficial effects of transcranial magnetic stimulation in diabetic neuropathy treatment,based on the outcomes of its use to treat neurodegeneration,pain,blood flow change,autonomic nervous disorders,vascular endothelial injury,and ***,the studies suggest that transcranial magnetic stimulation can produce excitatory/inhibitory stimulation of the cerebral cortex or local areas,promote the remodeling of the nervous system,and that it has good application prospects for the localization of the injury,neuroprotection,and the promotion of nerve ***,transcranial magnetic stimulation is useful for the screening and early treatment of diabetic *** magnetic stimulation can also alleviate pain symptoms by changing the cortical threshold and inhibiting the conduction of sensory information in the thalamo-spinal pathway,and therefore it has therapeutic potential for the treatment of pain and pain-related depressive symptoms in patients with diabetic ***,based on the effect of transcranial magnetic stimulation on local blood flow and its ability to change heart rate and urine protein conten

关键词： autonomic neuropathy central nervous system depression inflammation oxidative stress pain peripheral nerve plasticity recovery regeneration vascular

Synthesis and Crystal Structure of a New Glycinato Copper Compound

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Chinese Journal of Structural Chemistry 2006年第5期25卷 631-635页

作者： XIANG sheng-Chang sheng Tian-Lu FU Rui-Biao HU sheng-Min WU Xin-Tao State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter The Chinese Academy of Sciences Fuzhou Fujian 350002 China

A glycinato copper compound {Cu（NH2CH2COO）（H2O）ClO4} crystallizes in monoclinic, space group P21/n with a = 7.8299（9）, b = 10.3807（10）, c = 9.4775（12）A, β = 109.659（6）°, V = 725.43（12）A^3, Z = 4, Mr = 255.07, Dc = 2.335 g/cm^3, F（000） = 508,μ = 3.381 mm^-1, R = 0.0270 and wR = 0.0707 for 1677 observed reflections with Ⅰ 〉 2σ（Ⅰ）. The title compound contains a chain in the syn-anti conformation, which is generated by the glide-plane operation. The adjacent layers made up of the chains through the connection of perchlorate are related by inversion center operation, which links with each other through the hydrogen bonds.

关键词： glycinato copper complex chain hydrogen bonds

Disorders of cardiac rhythm in China

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Journal of Geriatric Cardiology 2024年第7期21卷 703-712页

作者： sheng-Shou HU The Writing Committee of the Report on Cardiovascular Health and Diseases in China

The Annual Report on Cardiovascular Health and Diseases in China(2022)intricate landscape of cardiovascular health in *** connection with the previous section,this seventh section of the report offers a comprehensive analysis of dis-orders of heart rhythm in *** 2021,China has achieved significant development and gratifying results in many aspects of the field of *** bundle branch pacing(LBBP),as an emerging pacing technique originating from China,has received widespread *** research results have emerged on its indications,surgical procedures,clinical evaluation,and com-parison with other pacing *** feasibility,effectiveness,and safety have been basically verified,but its long-term pro-gnosis still needs further confirmation from larger samples and longer follow-up time research *** pacemakers have begun to be used in a wider range of clinical applications,and related large sample cohort studies have been *** addi-tion,there are also noteworthy new achievements in the fields of pacemaker remote programming,anticoagulation and radiofre-quency catheter ablation(RFCA)therapy for atrial fibrillation,and implantable cardioverter defibrillator prevention of sudden cardiac *** terms of clinical practice,due to COVID-19 pandemic,the number of RFCA procedures and other device im-plantations in China has fluctuated,but it has gradually recovered since 2020.

关键词： cardiac prevention landscape

Synthesis-free directional modulation for retrodirective frequency diverse array

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Science China(Information Sciences) 2020年第10期63卷 152-173页

作者： sheng KE Jianping AN Shuai WANG School of Information and Electronics Beijing Institute of Technology

Combination of directional modulation(DM) and frequency diverse array(FDA) provides a novel opportunity for enabling physical layer security because of the enhanced ability of distance ***, in the existing studies, the time-varying nature of the FDA pattern is usually ignored. In this paper, a modified model of FDA-DM is proposed, in which the ignored time factor in the previous studies is taken into consideration for providing a new and more accurate perspective on evaluating the security of FDA-DM. Furthermore, we reveal that FDA-DM can achieve angle-dependent and directional-time-coupleddependent security. After that, based on the retrodirective FDA(RFDA) with a new structure, a novel synthesis-free FDA-DM scheme is proposed for both overcoming the limitations of the FDA-DM scheme and allowing self-tracking the position of the pilot signal without any prior knowledge. Meanwhile, a new set of nonlinear frequency offsets, defined as rearranged linear frequency offsets(RLFOs), is also proposed for both combining the advantages of the linear/nonlinear frequency offsets and bringing conveniences to practical implementation. In addition, the closed-form expression of the average signal-to-artificial-noise-ratio(SANR)is given out for evaluating the security performance of the proposed scheme. Finally, numerical results are presented to verify both the accuracy of the proposed theoretical analysis and the superiority of the RFDADM scheme.

关键词： secure transmission frequency diverse array (FDA) frequency offsets (FOs) retrodirective array average SANR distribution

Contractivity and Exponential Stability of Solutions to Nonlinear Neutral Functional Differential Equations in Banach Spaces

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Acta Mathematicae Applicatae Sinica 2012年第2期28卷 289-304页

作者： Wan-sheng WANG Shou-fuLI Run-sheng YANG School of Mathematics and Computational Science Changsha University of Science ＆ Technology Yuntang Campus Changsha 410114 China School of Mathematics and Computational Sciences Xiangtan University Xiangtan 411105 China

A series of eontractivity and exponential stability results for the solutions to nonlinear neutral functional differential equations （NFDEs） in Banach spaces are obtained, which provide unified theoretical foundation for the contractivity analysis of solutions to nonlinear problems in functional differential equations （FDEs）, neutral delay differential equations （NDDEs） and NFDEs of other types which appear in practice.

关键词： nonlinear neutral functional differential equations contractivity exponential stability~ Banachspaces