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Wave effect of gravitational waves intersected with a microlens field Ⅱ:An adaptive hierarchical tree algorithm and population study

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 241-254页

作者： Xikai Shan Guoliang Li Xuechun Chen Wen Zhao Bin Hu Shude Mao Department of Astronomy Tsinghua University Purple Mountain Observatory Chinese Academy of Sciences Institute for Frontier in Astronomy and Astrophysics Beijing Normal University School of Physics and Astronomy Beijing Normal University School of Astronomy and Space Science University of Science and Technology of China CAS Key Laboratory for Researches in Galaxies and Cosmology Department of Astronomy University of Science and Technology of ChinaChinese Academy of Sciences

The gravitational lensing wave effect generated by a microlensing field embedded in a lens galaxy is an inevitable phenomenon in strong lensed gravitational waves （SLGWs）.This effect presents both challenges and opportunities for the detection and application of ***,investigating this wave effect requires computing a complete diffraction integral over each microlens in the *** is extremely time-consuming due to the large number of microlenses （10～3-10～6）.Therefore,simply adding all the microlenses is ***,the complexity of the time delay surface makes the lens plane resolution a crucial factor in controlling numerical *** this paper,we propose a trapezoid approximation-based adaptive hierarchical tree algorithm to meet the challenges of calculation speed and *** find that this algorithm accelerates the calculation by four orders of magnitude compared to the simple adding method and is one order of magnitude faster than the fixed hierarchical tree algorithm proposed for electromagnetic *** importantly,our algorithm ensures controllable numerical errors,increasing confidence in the *** with our previous work （***.66,239511,2023）,this paper addresses all numerical issues,including integral convergence,precision,and computational time1).Finally,we conducted a population study on the microlensing wave effect of SLGWs using this algorithm and found that the microlensing wave effect cannot be ignored,especially for Type ii SLGWs （from saddle position of the time delay surface） due to their intrinsic geometric structures and their typical intersection with a denser microlensing ***,more than 33%（11%） of SLGWs have a mismatch larger than 1%（3%） compared to the unlensed ***,we found that the mismatch between signal pairs in a doubly imaged GW is generally larger than 10-3,and 61%（25%） of signal pairs have a mismatch larger than 1%（3%）.Therefo

关键词： gravitational lensing diffractional integral algorithm gravitational wave

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Effect of Co-Substitution on Magnetic Properties in Spinels GeNi2O4 Systems

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Chinese Physics Letters 2008年第11期25卷 4117-4119页

作者： R. Masrourl M. Hamedoun Benyoussef A. Hourmatallah K. Bouslykhane N. Benzakour Laboratoire de Physique du Solide Université Sidi Mohammed Ben Abdellah Faculté des sciences BP 1796 Fes Morocco Expert A uprés de I'Académie hassan H des sciences et Techniques Rabat Morocco LMPHE Fazulté des Sciences Université Mohamed V Rabat Morocco member of the hassan ii academy of sciences and technology Rabat Morocco Equipe de Physique du Solide Eeole Normale Supérieure BP 5206 Bensouda Fes Morocco

The magnetic properties of spinel GeNi2-2x Co2x O4 systems in the range 0 ≤ x ≤1 are studied by mean field theory and high-temperature series expansions. The nearest neighbouring and the next-neighbouring superexchange interactions J1 （x） and J2（x） are evaluated for these systems in the range 0 ≤ x ≤ 1, by using the first theory. The intra-planar and the inter-planar interactions and the exchange energy are deduced. The second theory is applied in the spinel GeNi2-2xCo2O4 systems, combined with the Padé approximants method, to determine the magnetic phase diagrams （TN versus dilution x） in the range 0 ≤ x ≤1. The obtained theoretical results are in agreement with experimental data obtained by magnetic measurements. The critical exponents associated with the magnetic susceptibility γ and the correlation lengths u are deduced.

关键词： the power-law exponents precipitation durative abrupt precipitation change

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Earthquake engineering in China

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Earthquake Engineering and Engineering Vibration 2002年第1期1卷 1-9页

作者：胡聿贤 Institute of Geophysics China Seismological BureauBeijing100081China Professor member of Chinese Academy of Sciences

The development of earthquake engineering in China is described into three *** initial stage in 1950's- 1960's was marked with the initiation of this branch of science from its creation in the first national 12-year plan of science and technology by specifying earthquake engineering as a branch item and IEM was one *** first earthquake zonation map and the first seismic design code were soon completed and used in engineering *** effect on structural design and site selection were seriously *** second stage marked with the occurrence of quite a few strong earthquakes in China, from which many lessons were learned and corresponding considerations were specified in our design codes and followed in construction *** third stage is a stage of disaster management,which is marked by a series of government documentations,leading by a national law of the People's Republic of China on the protecting against and mitigating earthquake disasters adopted at the meeting of the Standing Committee of the National People's Congress of the People's Republic of China in 1997,and then followed by some provincial and municipal laws to force the actions outlined in the national *** may be expected that our society will be much more safer to resist the attack of future strong earthquakes with less ***, possible future developments are also discussed.

关键词： earthquake engineering in China stage of development disaster management future developments

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Environmental and tectonic significance of Late Permian reefs in the Linxi and adjacent areas in Inner Mongolia of China

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Science China Earth sciences 2016年第7期59卷 1463-1476页

作者： TIAN Shu Gang ZHANG Yong Sheng GONG Yue Xuan LI Zi Shun GAO Lian Da ZHAI Da Xing ZHU Chang Wei Institute of Geology Chinese Academy of Geological Sciences Institute of Mineral Resources Chinese Academy of Geological Sciences Department of Science and technology Chinese Academy of Geological Sciences

Many plateau-edge reefs and reef mounds of the Late Permian have been discovered in Linxi County and adjacent areas of Inner Mongolia, China. These reefs verify that the Hinggan-Inner Mongolia Area was an open and unobstructed sea-trough in Late Permian. Facies and sequences of reef strata in member 4 and member 5 of the Linxi Formation were studied for information to reconstruct the closing process of the Linxi-Jiutai chasm in the sea-trough, i.e., to constrain subsidence, uplift, and final closing. Ages of the reef-bearing strata have been determined to be late and end of Late Permian, based on ranges or abundances of diverse fossils. Six reef-building organic assemblages were distinguished, representing different ecologic conditions, according to morphological functions and paleoecological adaptations of organisms including primarily sponges, bryozoans, and calcareous algae. Two types of shelf slopes, the gentle slope and the steep slope, have been interpreted for member 4 and member 5 of the Linxi Formation, based on the assemblages. The locations of outcrops, and types of these reefs delineate the north margin of Sino-Korea Platform, and define uplift and final closing of the Linxi-Jiutai chasm at the end of Late Permian.

关键词： Reefs Facies sequence Paleoecology Late Permian Inner Mongolia

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Portable System for Rapid Field Test of CEA in Human Serum Based on Chemiluminescence Enzyme Immunoassay

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Chinese Journal of Electronics 2017年第1期26卷 152-155页

作者： LIU Juntao QU Shuxue LUO Jinping WANG Bin CAI Xinxia State Key Laboratory of Transducer technology Institute of Electronics Chinese Academy of Sciences University of Chinese academy of sciences

Carcinoembryonic antigen(CEA) is one of the most widely used tumor markers worldwide. A portable system was designed for rapid field specific test of CEA based on immunomagnetic separation and chemiluminescence immunoassay, which consisted of chemiluminescent immunosensor and optical test instrument. The chemiluminescent immunosensor was based on immunomagnetic separation and chemiluminescence immunoassay, which utilized a immuno-sandwich scheme as-say with Horseradish peroxidase(HRP) labeled anti-CEA antibody and Immunomagnetic beads(IMBs). And the test instrument consisted of optical detection module and central processing and control system. The optical noise of this instrument was below 40 photons/s. The system could achieve a sample test in 30 minutes, and the detecting result showed a good liner relationship between the intensity of luminescence and concentration of CEA in the range from 1 to1000ng/m L, with a correlation coefficient of 0.9858. Real human samples were also detected with this system in comparison with clinical results and a correlation coefficient of0.9934 was obtained. The instrument is portable and easy to operate, which will provide potential application in cancer clinical test.

关键词： Chemiluminescence immunoassay Carcinoembryonic antigen Rapid field test Optical sensor FPGA NIOS ii processor

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Recent progress in the interaction between energetic particles and tearing modes

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National Science Review 2022年第11期9卷 240-261页

作者： Huishan Cai Ding Li Chinese academy of sciences Key Laboratory of Geospace Environment School of Nuclear Sciences and TechnologyUniversity of Science and Technology of China Institute of Physics Chinese Academy of Sciences Songshan Lake Materials Laboratory

The dynamics of energetic particles and tearing modes and the interactions between them are of great significance for magnetically confined fusion plasmas. In this review, we focus on these issues in the context of tokamak plasmas. The interaction between energetic particles and tearing modes is considered from two perspectives:(i) the influence of energetic particles on tearing modes and(ii) the transport of energetic particles by tearing modes. The influence of energetic particles on tearing modes is described on the basis of a general dispersion relation for tearing modes. The effects of energetic particles are considered separately in the outer region and the island region of a tearing mode. The physics mainly results from the modification of the perturbed parallel current by energetic particles without wave–particle resonance. In addition, the resonance between energetic particles and tearing modes is also reviewed. For the transport of energetic particles, transport of both circulating and trapped energetic particles by tearing mode is reviewed. Our descriptions of physical phenomena here are based on an analytical approach, while the experiments and simulations are used to illustrate and confirm our results. Finally, a number of open issues are discussed.

关键词： magnetically confined plasma energetic particle tearing mode transport confinement tokamak

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On Some Proximity Problems of Colored Sets

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Journal of Computer Science & technology 2014年第5期29卷 879-886页

作者：范成林罗军王文成钟发荣朱滨海 Shenzhen Institutes of Advanced technology Chinese Academy of Sciences Huawei Noah's Ark Laboratory State Key Laboratory of Computer Science Institute of Software Chinese Academy of Sciences College of Mathematics Physics and Information Technology Zhejiang Normal University Department of Computer Science Montana State UniversityBozeman MT 59717 U.S.A. MemberACM

The maximum diameter color-spanning set problem（MaxDCS） is defined as follows： given n points with m colors, select m points with m distinct colors such that the diameter of the set of chosen points is maximized. In this paper, we design an optimal O（n log n） time algorithm using rotating calipers for MaxDCS in the plane. Our algorithm can also be used to solve the maximum diameter problem of imprecise points modeled as polygons. We also give an optimal algorithm for the all farthest foreign neighbor problem（AFFN） in the plane, and propose algorithms to answer the farthest foreign neighbor query（FFNQ） of colored sets in two- and three-dimensional space. Furthermore, we study the problem of computing the closest pair of color-spanning set（CPCS） in d-dimensional space, and remove the log m factor in the best known time bound if d is a constant.

关键词： computational geometry colored set algorithm maximum diameter color-spanning set problem

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First-principles prediction of the magnetism of 4f rare-earth-metal-doped wurtzite zinc oxide

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Journal of Rare Earths 2014年第8期32卷 715-721页

作者： A.G.El Hachimi H.Zaari A.Benyoussef M.El Yadari A.El Kenz Laboratoire de Magnétisme et Physique des Hautes Energies LMPHE (URAC 12) Département de Physique B.P.1014 Faculté des SciencesUniversité Mohammed V-Agdal Institut of Nanomaterials and Nanotechnology hassan II Academy of Science and Technology Department of Science Moulay Ismail University Faculté Polydisciplinaire

Electronic structure and magnetic properties of wurtzite ZnO semiconductor doped with rare earth （RE=La, Ce, Pr, Pm, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm and Yb） atoms were studied using spin-polarized density functional theory based on the full-potential linear augmented plane wave （FP-LAPW） method as implemented in the Wien2k code. In this approach the generalized gradient approximation （GGA） was used for the exchange-correlation （XC） potential. Our results showed that the substitution of RE ions in ZnO induced spins polarized localized states in the band gap. Moreover, the studied DMSs compounds retained half metallicity at dopant concentration x=0.625%for most of the studied elements, with 100%spin polarization at the Fermi level （EF）. The total magnetic moments of these compounds existed due to RE 4f states present at EF, while small induced magnetic moments existed on other non-magnetic atoms as well. Finally, the energy difference between far and near configurations was investigated. It was found that the room temperature ferromagnetism was possible for RE-doped ZnO at near configuration. Since the RE-RE separation was long enough （far configuration） for magnetic coupling, the system became paramagnetic or antiferromagnetic ground state.

关键词： ZnO rare earths ferromagnetism DMS electronic structure magnetic properties half-metallic RE-doped ZnO FP-LAPW method density functional theory

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Using activation method to measure neutron spectrum in an irradiation chamber of a research reactor

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Nuclear Science and Techniques 2014年第1期25卷 81-85页

作者：周雪梅刘桂民李达王小鹤孟令杰 Shanghai Institute of Applied Physics the Chinese Academy of Sciences Key Laboratory of Nuclear Radiation and Nuclear Energy technology Chinese Academy of Sciences University of Chinese academy of sciences Northwest Institute of Nuclear technology

Neutron spectrum should be measured before test samples are *** spectrum in an irradiation chamber of a research reactor was measured by using activation method when the reactor is in normal operation under 2 *** kinds of non-fission foils(19 reaction channels) were selected,of which 10 were sensitive to thermal and intermediate energy regions,while the others were of different threshold energy and sensitive to fast energy *** measuring the foil radioactivity,the neutron spectrum was unfolded with the iterative methods SAND-Ⅱ and ***,shielding corrections of group cross-section and main factors affecting the calculation accuracy were studied and the uncertainty of solution was analyzed using the Monte Carlo method in the process of SAND-Ⅱ.

关键词：中子能谱测量辐照室研究堆活化法阈值能量蒙特卡罗方法活化方法

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Evolution of a protein domain interaction network

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Chinese Physics B 2010年第1期19卷 204-211页

作者：高丽锋石建军官山 Institute of Crop sciences Chinese Academy of Agricultural Sciences College of Physics Science and technology Yangzhou University

In this paper, we attempt to understand complex network evolution from the underlying evolutionary relationship between biological organisms. Firstly, we construct a Pfam domain interaction network for each of the 470 completely sequenced organisms, and therefore each organism is correlated with a specific Pfam domain interaction network; secondly, we infer the evolutionary relationship of these organisms with the nearest neighbour joining method; thirdly, we use the evolutionary relationship between organisms constructed in the second step as the evolutionary course of the Pfam domain interaction network constructed in the first step. This analysis of the evolutionary course shows：（i） there is a conserved sub-network structure in network evolution; in this sub-network, nodes with lower degree prefer to maintain their connectivity invariant, and hubs tend to maintain their role as a hub is attached preferentially to new added nodes; （ii） few nodes are conserved as hubs; most of the other nodes are conserved as one with very low degree; （iii） in the course of network evolution, new nodes are added to the network either individually in most cases or as clusters with relative high clustering coefficients in a very few cases.

关键词： complex network protein domain network evolution

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