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Earthquake Science 2011年第5期24卷 437-445页

作者： Guijuan Lai Fuqiong Huang Hongkui ge Institute of geophysics China Earthquake Administration Beijing 100081 China China Earthquake Networks Center Beijing 100045 China

t taking the M2 wave as calibration signals, we extract the phase shifts of the water level relative to the Earth tide in the Zhouzhi well by utilizing the cross-correlation function. And we further obtain the apparent permeability variation in the aquifer of the Zhouzhi well in 2008. Comparison with the commonly used tidal analysis software Baytap-G shows that phase shifts obtained by cross-correlation function are more stable. the resulting apparent permeability of the Zhouzhi well aquifer fluctuates with time, indicating it is a dynamically controlled parameter. the 2008 Wenchuan earthquake caused the apparent permeability increasing drastically, which is interpreted as the combination effects of effective stress changes and the barriers removing in the flow channel due to seismic wave pressure pulse. After the Wenchuan earthquake, the effective stress began to recover and the impurities deposited gradually, causing the apparent permeability to decrease a month later and almost recover to the pre-earthquake level in six months.

关键词： apparent permeability Zhouzhi well underground water Earth tide 2008 Wenchuanearth〈tuake

Spatial and temporal analysis of tuberculosis in Zhejiang Province, China, 2009-2012

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Infectious Diseases of Poverty 2016年第1期5卷 87-96页

作者： Erjia ge Xin Zhang Xiaomeng Wang Xiaolin Wei School of Biomedical Sciences The Chinese University of Hong KongHong KongS.A.R.China the Chinese University of Hong Kong Shenzhen Research InstituteShenzhenChina tB Program Zhejiang Centre for Disease Control and PreventionNo.630 Xincheng RoadBinjiang DistrictHangzhouZhejiang 310051China JC School of Public Health The Chinese University of Hong Kong2/FSchool of Public HealthPrince of Wales HospitalShatinHong KongChina. Dalla Lana School of Public Health University of Toronto155 College StreetTorontoON M5T 3 M7Canada

Background:tuberculosis(tB)is an infectious disease of major public health *** disease has demonstrated large space-time *** study aims to explore the space-time dynamics of tB cases in an economically and geographically dynamic province in China with specific references of tB control for policy ***:Data on all reported tB cases from 2009 to 2012 were collected from the tB program at the Zhejiang Provincial Center for Disease Control and *** employed time series and exploratory spatial data analyses,including Moran’s I,Local getis’s G_(i)^(*),and Kulldorff’s space-time scan statistics,to identify the temporal trends and spatial patterns of tB at a county ***:A total of 147,941 tB cases were reported during 2009–2012 in Zhejiang.A higher proportion of tB cases were younger,male,and registered permanent residents among all tB cases notified in the *** cases were reported most frequently in April with small peaks in June,July,and *** disease was spatially clustering with Moran’s I values ranged from 0.29 to 0.32(pt likely cluster and ten secondary clusters were identified,mainly concentrated in the southeast and west counties of the ***:this study identified seasonal patterns and significant space-time clusters of tB cases in Zhejiang,***,migration,and seasonal effects may play important roles in potential clusters.

关键词： tuberculosis spatial analysis space-time clusters Zhejiang China

Multiplicity of solutions for the semilinear subelliptic Dirichlet problem

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Science China Mathematics 2024年第3期67卷 475-504页

作者： Hua Chen Hong-ge Chen Jin-Ning Li Xin Liao School of Mathematics and Statistics Wuhan UniversityWuhan 430072China Wuhan Institute of Physics and Mathematics Innovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan 430071China

In this paper,we study the semilinear subelliptic equation{−△Xu=f(x,u)+g(x,u)inΩ,u=0 on∂Ω,where△X=−∑m i=1 Xi∗Xi is the self-adjoint Hormander operator associated with the vector fields X=(X_(1),X_(2),...,X_(m))satisfying the Hormander's condition,f(x,u)∈C(Ω×R),g(x,u)is a Carathéodory function onΩ×R,andΩis an open bounded domain in R~n with smooth *** the perturbation from the symmetry method with the approaches involving the eigenvalue estimate and the Morse index in estimating the minimax values,we obtain two kinds of existence results for multiple weak solutions to the problem ***,we discuss the difference between the eigenvalue estimate approach and the Morse index approach in degenerate *** with the classical elliptic cases,both approaches here have their own strengths in the degenerate *** new phenomenon implies that the results in general degenerate cases would be quite different from the situations in classical elliptic cases.

关键词： degenerate elliptic equations Hormander operators perturbation method Morse index

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Data science for oceanography:from small data to big data

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Big Earth Data 2022年第2期6卷 236-250页

作者： Chengcheng Qian Baoxiang Huang Xueqing Yang ge Chen Department of Information and Files North China Sea Marine Forecasting Center of State Oceanic AdministrationQingdaoChina College of Computer Science and technology Qingdao UniversityQingdaoChina Marine Division 1 Piesat Information Technology Co.LtdBeijingChina College of Information Science and Engineering Ocean University of ChinaQingdaoChina Laboratory for Regional Oceanography and Numerical Modeling Qingdao National Laboratory for Marine Science and TechnologyQingdaoChina

the rapid development of ocean observation technology has resulted in the accumulation of a large amount of data and this is pushing ocean science towards being *** on the types and distribution of oceanographic data,this paper analyzes the present and makes predictions for the future regarding the use of big and small data in ocean *** ocean science has not fully entered the era of big *** are two ways to expand the amount of oceanographic data to better understanding and man-agement of the *** the data level,fully exploit the potential value of big and small ocean data,and transform the limited,small data into rich,big data,will help to achieve *** the application level,oceanographic data are of great value if realize the federation of the core data owners and the *** oceanographic data will provide not only a reliable scientific basis for climate,ecological,disaster and other scientific research,but also provide an unprecedented rich source of information that can be used to make predictions of the future.

关键词： Ocean science data big data small data

Mesozoic Bimodal Volcanic Suite in Zhalantun of the Da Hinggan Range and Its geological Significance: Zircon U-Pb Age and Hf Isotopic Constraints

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Acta geologica Sinica(English Edition) 2006年第1期80卷 58-69页

作者： ZHANG Jiheng ge Wenchun WU Fuyuan LIU Xiaoming College of Earth Sciences Jilin University Changchun Jilin 130061 Institute of geology and geophysics Chinese Academy of Sciences Beijing 100029 Key Laboratory of Continental Dynamics （Northwest University） Ministry of Education Xi＇an Shaanxi 710069

Mesozoic bimodal volcanic rocks of basaltic andesite and rhyolite are widely distributed in the Da Hinggan Range, but their petrogenetic relationships and geodynamic implications are rarely constrained. Detailed studies on doleritic and porphyry dikes in the Zhalantun area indicate that they display features of magma mixing, suggesting their coeval formation. In situ zircon U-Pb dating shows that the porphyry was emplaced in the Early Cretaceous with a ^206Pb/^238U age of 130±1 Ma. Zircons from the dolerite also yield an Early Cretaceous emplacement age of 124±2 Ma although some inherited zircons have been identified. these age results indicate that the Early Cretaceous was an important period of magmatism in the Da Hinggan Range. Zircons from porphyry are characterized by positive value of εHf（t） as high as 10.3±0.5 with Hf depleted mantle model age of 349-568 Ma, whereas magmatic zircons from the dolerite have εHf（t） value of 11.0±1.4 with Hf depleted mantel model age of 342-657 Ma, consistent with those from the porphyry. Considering other data on the geological evolution of this area, it is concluded that the mafic magma originated from the partial melting of Paleozoic enriched lithospheric mantle, whereas the felsic magma came from recycling of juvenile crust formed during the Paleozoic. Both of the protoliths are closely related to the subduction of the Paleo-Asian Ocean during the Paleozoic, indicating that the Paleozoic is an important period of large-scale crustal growth in the area.

关键词： volcanic rocks zircon U-Pb dating Hf isotope crustal growth Da Hinggan Range NE China

Radiometric Zircon Ages of a tuff Sample from the Baishantou Member of Wuyun Formation,Jiayin:A Contribution to the Search for the K-t Boundary in Heilongjian River Area,China

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Acta geologica Sinica(English Edition) 2011年第6期85卷 1351-1358页

作者： SUZUKI Shigeyuki SUN ge Ulrich KNIttEL DANHARA tohru IWANO Hideki Department of Earth Sciences Okayama University Okayama 700-8530 Japan Key-Lab for Evolution of Past Life and Environment MEC Jilin University Changchun 130026 China Paleontological Institute of Shenyang Normal University Shenyang 110034 China Department of geosciences National Taiwan University Taipei 106 China Clay andlnterface Mineralogy RWTHAaehen University Germany Kyoto Fission-track Co. Ltd. 44-4 Minamitajiri-eho Omiya Kita-ku Kyoto 603-8832 Japan

the existence of the Cretaceous-tertiary （K/t） boundary in the non-marine succession is expected at Jiayin in the Heilongjiang River area, China. Zircons from a tuff sample from the Baishantou Member of Wuyun Formation in Jiayin were analyzed by the laser ablation inductively coupled plasma mass spectrometry （LA-ICP-MS） U-Pb dating and fission-track dating methods. Ages of 64.1±0.7 Ma （U-Pb） and 61.7±1.8 Ma （fission-track dating） were obtained, which allow reevaluation of a previously reported late Maastrichian age for the tuff layer that was in conflict with the paleontological evidence. these results confirm the Danian age of the section in agreement with the paleontological evidence.

关键词： U-Pb dating fission-track dating Baishantou section K/t boundary Danian Heilongjiang River area

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CAAI transactions on Intelligence technology 2022年第1期7卷 26-33页

作者： Hong Liu Peipei Yuan Bing Yang ge Yang Yang Chen Key Laboratory of Machine Perception Shenzhen Graduate SchoolPeking UniversityShenzhenChina School of Artificial Intelligence Chongqing University of TechnologyChongqingChina Yanka Kupala State University of Grodno GrodnoBelarus

Various time-frequency(t-F)masks are being applied to sound source localization ***,deep learning has dramatically advanced t-F mask ***,existing masks are usually designed for speech separation tasks and are suitable only for single-channel signals.A novel complex-valued t-F mask is proposed that reserves the head-related transfer function(HRtF),customized for binaural sound source *** addition,because the convolutional neural network that is exploited to estimate the proposed mask takes binaural spectral information as the input and output,accurate binaural cues can be *** with conventional t-F masks that emphasize single speech source–dominated t-F units,HRtFreserved masks eliminate the speech component while keeping the direct propagation ***,the estimated HRtF is capable of extracting more reliable localization features for the final direction of arrival ***,binaural sound source localization guided by the proposed t-F mask is robust under noisy and reverberant acoustic *** experimental results demonstrate that the new t-F mask is superior to conventional t-F masks and lead to the better performance of sound source localization in adverse environments.

关键词： estimation. sound function

Secondary Aggregation Induced by Volatile Additive for Improved Exciton Diffusion and Charge Separation in High Efficiency Organic Photovoltaic Devices

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Chinese Journal of Chemistry 2024年第22期42卷 2825-2832页

作者： Yufeng ge Xuewu Li Mingxu Zhou Peng Lu Xiaotao Hao School of Physics State Key Laboratory of Crystal MaterialsShandong UniversityJinanShandong 250100China schoolof Physics National Demonstration Center for Experimental Physics EducationShandong University JinanShandong 250100 China ARC Centre of Excelence in Exciton Science Schoolof ChemistryThe Universityof MebourneParkvilleVictoria 31Australia

Comprehensive Summary the morphology of the active layer plays a crucial role in the performance of organic *** volatile additives are commonly used to manipulate the morphology,their mechanism of action remains poorly *** this study,we conducted a systematic exploration of the mechanism of the traditional volatile additive 1-CN in film formation kinetics of typical PM6:Y6 *** found that 1-CN induces a secondary aggregation effect,improving film morphology and promoting face-on crystalline *** elucidating its impact on exciton dynamics,we established a link between morphology optimization and increased exciton diffusion length and accelerated charge *** findings unveil the unique mechanism of action of volatile additive,providing a new perspective for improving the morphology and enhancing the performance of organic photovoltaic devices.

关键词： Organic photovoltaics Volatile additive Exciton diffusion Charge separation Hole transfer Morphology control Photophysics Kinetics π-πStacking time-resolved spectroscopy Adsorption

Asymptotic periodicity in a diffusive West Nile virus model in a heterogeneous environment

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International Journal of Biomathematics 2017年第8期10卷 87-102页

作者： Abdelrazig K. tarboush Jing ge Zhigui Lin Department of Mathematics Faculty of Education University of Khartoum Khartoum 321 Sudan

this paper is concerned with a diffusive West Nile virus model （WNv） in a heterogeneous environment. the basic reproduction number R0 for spatially homogeneous model is first introduced. We then define a threshold parameter R0N for the corresponding diffusive WNv model in a heterogeneous environment. It is shown that if R0^N 〉 1, the model admits at least one nontrivial t-periodic solution, whereas if RN 〈 1, the model has no nontrivial t-periodic solution. By means of monotone iterative schemes, the true solution can be obtained and the asymptotic behavior of periodic solutions is presented. the paper is closed with some numerical simulations to illustrate our theoretical results.

关键词： West Nile virus basic reproduction number time periodicity asymptoticbehavior.

CO2 Laser Moxibustion for Knee Osteoarthritis: Study Protocol for A Multicenter, Double-Blind, Randomized Controlled trial

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Chinese Journal of Integrative Medicine 2020年第8期26卷 568-576页

作者： GUO Meng-hu ZHAO Ling WU Fan DU Jiong DING Chen-huan ge Jing-hua tAN Ming t LAO Li-xing SHEN Xue-yong CHENG Ke School of Acupuncture-Moxibustion and tuina Shanghai University of Traditional Chinese MedicineShanghai 201203China Shuguang Hospital Affiliated to Shanghai University of traditional Chinese Medicine Shanghai 200021China Renji Hospital Affiliated to Shanghai Jiaotong University Shanghai 200127China Shanghai Changning tianshan traditional Chinese Medicine Hospital Shanghai 200051China Department of Biostatistics Bioinformatics and BiomathematicsGeorgetown University Medical CenterWashingtonD.C.20057USA School of Chinese Medicine University of Hong KongHong Kong SARChina

Background:Knee osteoarthritis(OA)is a major cause of disability among the older *** treatments are safe and *** is commonly used in treating knee OA in Chinese medicine(CM).CO2 Laser moxibustion device is a substitute for traditional moxibustion,which mimics the effects of traditional *** data are needed to support its application in knee ***:the trial aims to assess the effect and safety of CO2 laser moxibustion in patients with knee osteoarthritis compared with a sham ***:this is a protocol for a multicenter,randomized,double-blind,placebo-controlled trial.A total of 392 participants were recruited and assigned to the CO2 laser moxibustion group and sham laser moxibustion group with a 1:1 ratio at 6 outpatient clinics in Shanghai,*** in both groups received treatment at the affected knee(s)at the acupuncture point Dubi(St 35)and an Ashi *** were 3 sessions per week for 4 weeks,and an additional 20-week *** outcomes were changes in the Western Ontario and McMaster Universities Osteoarthritis Index(WOMAC)pain scores at week *** outcomes were WOMAC function score,stiffness score and overall score,VAS pain,Short-Form heath survey(SF-36),and patients’global *** serum levels of cytokines involved in progress of knee OA were *** was assessed during the whole *** effectiveness was assessed by both participants and treatment ***:CO2 laser moxibustion device,designed as a substitute for CM moxibustion,is easy to use and control with no choking smoke and smell,and is a plausible method for double-blind *** study would provide rigorous evidence for the effect and safety of CO2 laser moxibustion in treating knee OA.

关键词： Chinese medicine laser moxibustion knee osteoarthritis pain randomized controlled trial