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Effects of Phase Damping on Controlled Teleportation of a Qubit by a GHZ State

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Communications in Theoretical Physics 2008年第4期49卷 895-900页

作者： han xiao-Ping liu Jin-Ming State Key Laboratory of Precision Spectroscopy Department of Physics East China Normal University Shanghai 200062China

We investigate controlled teleportation ofa qubit via a GHZ state with the influence of phase damping in the Bloch sphere representation. We use the average trace distance to describe how close the output state is to the input state to be teleported. Our results show that the average trace distance is a function of decoherence rates and angles of the analyzer performed by the controller in the single-particle projective measurement. Moreover, for a fixed value of the decoherence rate, one can adjust the analyzer angle to achieve the optimal average trace distance.

关键词： controlled teleportation GHZ state phase damping trace distance

An efficient parallel algorithm of variational nodal method for heterogeneous neutron transport problems

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Nuclear Science and Techniques 2024年第4期35卷 29-45页

作者： han Yin xiao-Jing liu Teng-Fei Zhang School of Nuclear Science and Engineering Shanghai Jiao Tong UniversityShanghai 2002040China

The heterogeneous variational nodal method(HVNM)has emerged as a potential approach for solving high-fidelity neutron transport ***,achieving accurate results with HVNM in large-scale problems using high-fidelity models has been challenging due to the prohibitive computational *** paper presents an efficient parallel algorithm tailored for HVNM based on the Message Passing Interface *** algorithm evenly distributes the response matrix sets among processors during the matrix formation process,thus enabling independent construction without *** the formation tasks are completed,a collective operation merges and shares the matrix sets among the *** the solution process,the problem domain is decomposed into subdomains assigned to specific processors,and the red-black Gauss-Seidel iteration is employed within each subdomain to solve the response matrix ***-to-point communication is conducted between adjacent subdomains to exchange data along the *** accuracy and efficiency of the parallel algorithm are verified using the KAIST and JRR-3 test *** results obtained with multiple processors agree well with those obtained from Monte Carlo *** parallelization of HVNM results in eigenvalue errors of 31 pcm/-90 pcm and fission rate RMS errors of 1.22%/0.66%,respectively,for the 3D KAIST problem and the 3D JRR-3 *** addition,the parallel algorithm significantly reduces computation time,with an efficiency of 68.51% using 36 processors in the KAIST problem and 77.14% using 144 processors in the JRR-3 problem.

关键词： Neutron transport Variational nodal method Parallelization KAIST JRR-3

Evaluation of natural gas hydrate resources in the South China Sea using a new genetic analogy method

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Petroleum Science 2022年第1期19卷 48-57页

作者： xiao-han liu Tao Hu Xiong-Qi Pang Zhi Xu Tong Wang Xing-Wen Zhang En-Ze Wang Zhuo-Ya Wu State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum(Beijing)Beijing 102249China College of Geosciences China University of Petroleum(Beijing)Beijing102249China School of Earth&Space Sciences Peking UniversityBeijing100871China Research Institute of Petroleum Exploration&Development CNPCBeijing100083China

Natural gas hydrate(NGH)has attracted much attention as a new alternative energy ***,evaluations of global NGH resources in the past few decades have casted a decreasing trend,where the estimate as of today is less than one ten-thousandth of the estimate forty years *** NGH researches in China started relatively late,but achievements have been made in the South China Sea(SCS)in the past two ***-five studies had been carried out to evaluate NGH resource,and results showed a flat trend,ranging from 60 to 90 billion tons of oil equivalent,which was 2-3 times of the evaluation results of technical recoverable oil and gas resources in the *** big difference is that the previous 35 group of NGH resource evaluations for the SCS only refers to the prospective gas resource with low grade level and high uncertainty,which cannot be used to guide exploration or researches on development *** on the analogy with the genetic mechanism of conventional oil and gas resources,this study adopts the newly proposed genetic method and geological analogy method to evaluate the NGH *** show that the conventional oil and gas resources are 346.29×10^(8)t,the volume of NGH and free dynamic field are 25.19×10^(4)km^(3) and(2.05-2.48)×10^(6)km^(3),and the total amount of in-situ NGH resources in the SCS is about(4.47-6.02)×10^(12)m^(3).It is considered that the resource of hydrate should not exceed that of conventional oil and gas,so it is 30 times lower than the previous *** study provides a more reliable geological basis for further NGH exploration and development.

关键词： South China Sea Natural gas hydrate Natural gas hydrate resources Conventional oil and gas resources Genetic method Analogy method

Distribution and resource evaluation of natural gas hydrate in South China sea by combing phase equilibrium mechanism and volumetric method

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Petroleum Science 2022年第1期19卷 26-36页

作者： Tong Wang Tao Hu Xiong-Qi Pang Xing-Wen Zhang xiao-han liu Zhi Xu En-Ze Wang Zhuo-Ya Wu State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum(Beijing)Beijing102249China College of Geosciences China University of Petroleum(Beijing)Beijing102249China School of Earth&Space Sciences Peking UniversityBeijing100871China Research Institute of Petroleum Exploration and Development PetroChina Company LimitedBeijing100083China

China Geological Survey conducted the second trial production of natural gas hydrate(NGH)in the Shenhu Area in South China Sea(SCS)from 2019 to *** with the first trial production in 2017,the second trial showed significantly increased daily gas production and total gas production,and removed some technical obstacles for large-scale NGH resource developments in the ***,current NGH resource evaluation in the SCS is still at the stage of prospective gas content assessment,which is unable to guide further NGH exploration and *** study utilized the hydrate phase balance to delineate the NGH distribution range and effective thickness and volumetric method to evaluate NGH *** on the latest exploration and production data from the Shenhu Area,Monte Carlo simulation was performed to calculate the NGH resource amount with different *** assuming a 50%cumulative probability,the in-situ NGH resources in the SCS was estimated to be11.7×10^(12)m^(3) and the recoverable NGH resources was 2.8×10^(12)m^(3).These results will provide a more reliable resource basis for China to formulate comprehensive development strategies for oil and gas exploration in the SCS.

关键词： South China Sea Oil and gas resource Natural gas hydrate In-situ resource Recoverable resources

A Comparative Study on the Post-Buckling Behavior of Reinforced Thermoplastic Pipes(RTPs)Under External Pressure Considering Progressive Failure

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China Ocean Engineering 2024年第2期38卷 233-246页

作者： DING Xin-dong WANG Shu-qing liu Wen-cheng YE xiao-han College of Engineering Ocean University of ChinaQingdao 266100China Shandong Provincial Key Laboratory of Ocean Engineering Ocean University of ChinaQingdao 266100China Department of Marine Technology Norwegian University of Science and Technology(NTNU)Trondheim NO-7491Norway

The collapse pressure is a key parameter when RTPs are applied in harsh deep-water *** investigate the collapse of RTPs,numerical simulations and hydrostatic pressure tests are *** the numerical simulations,the eigenvalue analysis and Riks analysis are combined,in which the Hashin failure criterion and fracture energy stiffness degradation model are used to simulate the progressive failure of composites,and the“infinite”boundary conditions are applied to eliminate the boundary *** for the hydrostatic pressure tests,RTP specimens were placed in a hydrostatic chamber after filled with *** has been observed that the cross-section of the middle part collapses when it reaches the maximum *** collapse pressure obtained from the numerical simulations agrees well with that in the ***,the applicability of NASA SP-8007 formula on the collapse pressure prediction was also *** has a relatively greater difference because of the ignorance of the progressive failure of *** the parametric study,it is found that RTPs have much higher first-ply-failure pressure when the winding angles are between 50°and 70°.Besides,the effect of debonding and initial ovality,and the contribution of the liner and coating are also discussed.

关键词： reinforced thermoplastic pipes post-buckling behavior progressive failure of composites debonding initial ovality

CHARACTERISTIC MAGNETIC RESONANCE ENhanCEMENT PATTERN IN CEREBRAL SCHISTOSOMIASIS

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Chinese Medical Sciences Journal 2006年第4期21卷 223-227页

作者： han-qiu liu xiao-yuan Feng Zhen-wei Yao Hua-ping Sun Department of Radiology Huashan Hospital Fudan University Shanghai 200040

Objective To describe the characteristic magnetic resonance imaging （MRI） appearance of cerebral schistosomiasis. Methods Twenty-five patients whose diagnosis of central nervous system （CNS） schistosomiasis had been pathologically （n = 8 ） and clinically （n = 17） confLrmed were randomly selected. MRI was performed on a Signal 1.5T MRI scanner before and after the intravenous administration of gadopentetate dimeghimine constrast medium. We reviewed the MRI studies obtained at the time of initial presentation, as well as follow-up studies obtained during and after medical treatment Results ImmunoLogicaL tests in L5 patients indicated schistosomiasis haematobium. Contrast-enhanced TL-weighted images in 22 cases showed central linear enhancement surrounded by multiple enhancing punctate nodules, which ap- peared “arborized”. Through operation and pathological examination, 8 cases had the granuloma formation of schistoso- mal eggs extensive surrounded by inflammation and venous congestion. And 17 cases were treated with praziquantel and corticosteroid therapy. And they were followed up for 2 months by taking MRI, which turned out to be complete resolution of the enhancing structure and edema. At follow-up, all the patients＇ initial symptoms also resolved. Conclnsion The specified MRI enhancement pattern of cerebral schistosomiasis is common in most cases of CNS schistosomiasis, so it should be taken account into the diagnosis of cerebral schistosomiasis.

关键词： cerebral schistosomiasis diagnosis magnetic resonance imaging

A high-entropy-designed cathode with V5+-V2+ multi-redox for high energy density sodium-ion batteries

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Journal of Energy Chemistry 2024年第10期97卷 429-437页

作者： Xiang Ding xiaofen Yang Yibing Yang Liangwei liu Yi xiao Lili han College of Chemistry and Materials Science Fujian Normal University State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences

Na3V2（PO4）3（NVP） is gifted with fast Na+conductive NASICON *** it still suffers from low electronic conductivity and inadequate energy ***,a high-entropy modification strategy is realized by doping V3+site with Ga3+/Cr3+/Al3+/Fe3+/In3+simultaneously(***3V2-x（GaCrAlFeIn）x（PO4）3;x=0,0.04,0.06,and 0.08) to stimulate the V5+■V2+reversible multi-electron *** configuration high-entropy can effectively suppress the structural collapse,enhance the redox reversibility in high working voltage（4.0 V）,and optimize the electronic induced *** in-situ X-ray powder diffraction and in-situ electrochemical impedance spectroscopy tests efficaciously confirm the robust structu ral recovery and far lower polarization throughout an entire charge-discharge cycle during 1.6-4.3 V,***,the density functional theory calculations clarify the stronger metallicity of high-entropy electrode than the bare that is derived from the more mobile free electrons surrounding the vicinity of Fermi *** grace of high-entropy design and multi-electron transfer reactions,the optimal Na3V1.7（GaCrAlFeIn）0.06（PO4）3can exhibit perfect cycling/rate performances(90.97%@5000 cycles@30 C;112 mA h g-1@10 C and 109 mA h g-1@30 C,2.0-4.3 V).Furthermore,it can supply ultra-high185 mA h g-1capacity with fa ntastic energy density(522 W h kg-1) in half-cells（1.4-4.3 V）,and competitive capacity(121 mA h g-1) as well as energy density(402 W h kg-1) in full-cells（1.6-4.1 V）,demonstrating enormous application potential for sodium-ion batteries.

关键词： High energy density High-entropy Na3V2(PO4)3 Sodium-ion batteries V5+⇋V2+ multi-redox

Nocturnal hypertension and riser pattern are associated with heart failure rehospitalization in patients with heart failure with preserved ejection fraction

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Journal of Geriatric Cardiology 2023年第6期20卷 448-458页

作者： Gang HUANG xiao-han liu Yue ZhanG Yu-Xin ZHU Yun HE Tian-Bo WANG Zhen ZhanG Jun-Bo XU Department of Cardiology the Third People’s Hospital of ChengduSichuanChina Cardiovascular Disease Research Institute of Chengdu SichuanChina Affiliated Hospital of Southwest Jiaotong University SichuanChina The Second Affiliated Chengdu Clinical College of Chongqing Medical University SichuanChina

BACKGROUND Nocturnal hypertension is reported as a risk factor for cardiovascular *** study aimed to explore the potential association between nocturnal hypertension and heart failure(HF)rehospitalization in patients with HF with preserved ejection fraction(HFpEF).METHODS A total of 538 patients with HFpEF from May 2018 to December 2021 were consequently recruited in this study and followed up until they were readmitted for HF or the end of this *** regression analysis was used to reveal the potential association between nighttime blood pressure(BP)levels,nocturnal hypertension and nocturnal BP patterns and HF ***-Meier curve was used to assess the cumulative event-free survival rate between *** There were 537 patients with HFpEF were included in the final *** mean age of the study population was 77.14±8.68 years,and 41.2% of patients were *** a median follow-up duration of 10.93(4.19–21.13)months,176 patients(32.7%)with HFpEF were readmitted for *** regression analysis had revealed that nighttime systolic BP level[hazards ratio(HR)=1.018,95%CI:1.008–1.028,P=0.001],nighttime diastolic BP level(HR=1.024,95%CI:1.007–1.042,P=0.007),nocturnal hypertension(HR=1.688,95%CI:1.229–2.317,P=0.001)were associated with HF ***-Meier analysis had demonstrated that patients with nocturnal hypertension had significantly lower event-free survival rate(log-rank Phan those with a dipper *** findings were also confirmed in patients with HFpEF and *** Nighttime BP levels,nocturnal hypertension and a riser pattern are independently associated with HF rehospitalization in patients with HFpEF,and prominently in patients with HFpEF and *** controlled nighttime BP levels should be empha

关键词： pattern fraction admitted

Evaluation of natural gas hydrate resources in the South China Sea by combining volumetric and trend-analysis methods

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Petroleum Science 2022年第1期19卷 37-47页

作者： Xing-Wen Zhang Tao Hu Xiong-Qi Pang Yao Hu Tong Wang En-Ze Wang Zhi Xu xiao-han liu Zhuo-Ya Wu Laboratory of Petroleum Resources and Prospecting China University of Petroleum(Beijing)Beijing 102249China College of Geosciences China University of Petroleum(Beijing)Beijing 102249China CNOOC International Limited Beijing 100029China School of Earth&Space Sciences Peking UniversityBeijing 100871China Research Institute of Petroleum Exploration and Development PetroChina Company LimitedBeijing 100083China

Natural gas hydrate(NGH),considered as a type of premium energy alternative to conventional hydrocarbons,has been broadly *** estimate of the total NGH resources in the world has decreased by more than 90%since the first evaluation in *** and geophysical conditions of the South China Sea(SCS)are favorable for the formation of NGH,which has been proved by drilling results up to *** recoverability of the NGH in the SCS has been confirmed by the production tests using both vertical and horizontal *** 2001,35 estimates of NGH resources in the SCS have been made,with relatively stable results varying between 600 and 900×109 ton oil *** these estimations,the volumetric method was commonly adopted,but the geological conditions,the migration-accumulation mechanisms of NGH,and the practical recoverability were not *** estimates cannot be regarded as evaluated resources according to the international resource evaluation standards,but are at most about prospective gas content of NGH,thus inefficient for guiding explorations and *** solve these problems,this study divides the past NGH surveys in the SCS into seven stages,acquires key geological parameters of every stage based on previous studies and analogy with other areas,evaluates the NGH resources of these seven stages by using the volumetric method,then adopts a new trend-analysis method to simulate the downward trend of these estimates,and finally predicts the NGH resources in the SCS at 2025 and *** downward trend is because of the continuous improvement of NGH understanding over time,which is consistent with the trend of global NGH *** the present stage(from 2019 to 2021),the average technically recoverable resource(ATRR)is 7.0×10^(12)m^(3),and the estimates of 2025 and 2030 ATRR are 6.46×10^(12)m^(3) and 4.01×10^(12)m^(3)respectively,with a difference of less than 40%.Therefore,it can be inferred that the ATRR of NGH in the SCS is between

关键词： Resource evaluation Natural gas hydrates The South China Sea Volumetric method Trend-analysis method