检索结果-南通市图书馆

Instantaneous attributes for characterization of subsurface structures of an active fault by GPR

在线全文

学校读者我要写书评

暂无评论

Instantaneous attributes for characterization of subsurface ...

The 4th International Conference on Environmental and Engineering Geophysics

作者： motoyuki sato Tohoku University

＜正＞Several new faults are emerging near Ulaanbaatar city,the capital of Mongolia due to *** becomes very important to investigate these *** penetrating radar（GPR） has been widely used in geologic,hydrogeologic,and civil engineering *** with geological exposures and trenches,GPR data can offer detail subsurface information to past earthquakes *** attributes include instantaneous amplitude,instantaneous phase and instantaneous *** a measure of continuity of reflection events,instantaneous phase could reflect changes in lithology and stratigraphic sequence and identify discontinuities caused by *** this paper,we will describe the field experiment conducted in the Deren fault by GPR,data processing procedures,and using a simple geological model inferred from the instantaneous phase for data *** processed GPR data show details of subsurface information correlated to the *** of the identified structures ranging from a few tens of centimeters to depths＞10 m are not evident at the *** surface-based observations from the geological trench,GPR should be a good tool to reveal complicated fault zone information such as location,dip and azimuth.

关键词： Ground penetrating radar(GPR) fault instantaneous attribute

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

频率步进探地雷达及其在地雷探测中的应用

电子学报 2005年第3期33卷 436-439页

作者：方广有佐藤源之中国科学院电子学研究所 Center for Northeast Asian Studies Tohoku University Sendai9808576Japan

频率步进方法是探地雷达技术的工作体制之一 ,与时域无载频脉冲体制的探地雷达技术相比 ,在探测性能上具有较多的优越性 .本文在简述其工作原理的基础上 ,介绍了作者研制的一种频率步进探地雷达系统 ,该系统主要用于对地雷目标进行三维... 详细信息

频率步进方法是探地雷达技术的工作体制之一 ,与时域无载频脉冲体制的探地雷达技术相比 ,在探测性能上具有较多的优越性 .本文在简述其工作原理的基础上 ,介绍了作者研制的一种频率步进探地雷达系统 ,该系统主要用于对地雷目标进行三维成像探测 .在研制该雷达系统过程中 ,对已有的反对称Vivaldi天线提出了改进设计 .实验测量结果表明 ,本文研制的反对称Vivaldi天线与传统的同类天线相比 ,性能更加优越 .同时 ,为了得到更加清晰的地雷图像 ,本文还分别引入了f k偏移成像方法和合成孔经雷达 (SAR)处理技术对雷达探测信号进行处理 ,得到了满意的结果 .探测实例表明 ,频率步进探地雷达系统能够实现对浅层地下地雷目标的高分辨率三维成像探测 .

关键词：频率步进探地雷达 Vivaldi天线地雷探测 f-k偏移技术合成孔经雷达(SAR)处理技术

Shallow geophysical investigations at the Akhmim archaeological site,Suhag,Egypt

在线全文

学校读者我要写书评

暂无评论

Applied Geophysics 2008年第2期5卷 136-143页

作者： Mahfooz A.Hafez Magdy A.Atya Azza M.Hassan motoyuki sato Thomas Wonik Abeer A.El-Kenawy National Research Institute of Astronomy and Geophysics 11722 HelwanCairoEgypt Leibniz Institute for Applied Geosciences(GGA)30655 HannoverGermany National Research Institute of Astronomy and Geophysics 11722 HelwanCairoEgypt Tohoku university Center for Northeast Asian Studies980-8576 SendaiJapan Leibniz Institute for Applied Geosciences(GGA) 30655 HannoverGermany Geology Department Faculty of Science Zagazig University.44519 ZagazigEgypt

Ground penetrating radar, electromagnetic terrain conductivity, and electric tomography have proven to be effective tools if they are combined together to investigate archeological sites. We have conducted a geophysical survey at the Akhmim archaeological site, the main objective of our survey is to locate additional buried structures for further excavation. Geophysical data were acquired in the area using the GEM-300 multi-frequency terrain conductivity profiler, the SIR 2000 ground penetrating radar, and the Syscal R2 resistivity meter systems. The results of the integrated interpretation show a number of buried features and a strong linear zone about 1 m wide that coincides with the suspected trend of a buried wall. There appears to be two parallel ridges of strong reflections on either side, indicating two parallel walls extended East-West and a room is identified at the bottom left comer of the site. Moreover, the interpretation results of some selected GPR and dipoledipole resistivity profiles adjacent to the open-air museum suggest the existence of a second statue of Ramses Ⅱ to the right of the previously discovered statue which could still be buried in the sand.

关键词： Archaeological prospecting Akhmim GPR GEM resistivity

Factors hindering the degradation of pharmaceuticals from human urine in an iron-activated persulfate system

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2024年第1期135卷 130-148页

作者： Yiruiwen Xie Dao Guan Yangfan Deng Yugo sato Yu Luo Guanghao Chen Department of Civil and Environmental Engineering Water Technology LabHong Kong Branch of Chinese National Engineering Research Center for Control&Treatment of Heavy Metal PollutionThe Hong Kong University of Science&TechnologyHong Kong 999077China

This study investigated the degradation of clofibric acid(CFA),bezafibrate(BZF),and sulfamethoxazole(SMX)in synthetic human urine using a novel mesoporous iron powderactivated persulfate system(mFe-PS system),and identified the factors limiting their degradation in synthetic human urine.A kinetic model was established to expose the radical production in various reaction conditions,and experiments were conducted to verify the modeling *** the phosphate-containing mFe-PS system,the 120 min removal efficiency of CFA decreased from 95.1%to 76.6%as the phosphate concentration increased from 0.32 to 6.45 mmol/L,but recovered to 90.5%when phosphate concentration increased to 16.10 mmol/***,the increased concentration of phosphate from 0.32 to 16.10mmol/L reduced the BZF degradation efficacy from 91.5%to 79.0%,whereas SMX removal improved from 37.3%to 62.9%.The m Fe-PS system containing(bi)carbonate,from 4.20 to166.70 mmol/L,reduced CFA and BZF removal efficiencies from 100%to 76.8%and 80.4%,respectively,and SMX from 83.5%to 56.7%within a 120-min reaction *** addition,alkaline conditions(pH≥8.0)inhibited CFA and BZF degradations,while nonacidic pH(pH≥7.0)remarkably inhibited SMX *** of the kinetic model indicated the formation of phosphate(H_(2)PO_(4)^(·)/HPO_(4)^(·-))and/or carbonate radicals(CO_(3)^(·-))could limit pharmaceutical *** transformation products(TPs)of the pharmaceuticals revealed more incompletely oxidized TPs occurred in the phosphate-and(bi)carbonate-containing m Fe-PS systems,and indicated that H_(2)PO_(4)^(·)/HPO_(4)^(·-)mainly degraded pharmaceuticals via a benzene ring-opening reaction while CO_(3)^(·-)preferentially oxidized pharmaceuticals via a hydroxylation reaction.

关键词： Pharmaceutical degradation Human urine Iron-activated persulfate system Phosphate radicals Carbonate radicals Transformation products

New aspects of a small GTPase RAB35 in brain development and function

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第7期20卷 1971-1980页

作者： Ikuko Maejima Ken sato Laboratory of Molecular Traffic Institute for Molecular and Cellular RegulationGunma UniversityMaebashiJapan

In eukaryotic cells,organelles in the secretory,lysosomal,and endocytic pathways actively exchange biological materials with each other through intracellular membrane trafficking,which is the process of transporting the cargo of proteins,lipids,and other molecules to appropriate compartments via transport vesicles or *** processes are strictly regulated by various small GTPases such as the RAS-like in rat brain(RAB)protein family,which is the largest subfamily of the RAS *** of membrane trafficking affects tissue homeostasis and leads to a wide range of diseases,including neurological disorders and neurodegenerative ***,it is important to understand the physiological and pathological roles of RAB proteins in brain ***35,a member of the RAB family,is an evolutionarily conserved protein in metazoans.A wide range of studies using cultured mammalian cells and model organisms have revealed that RAB35 mediates various processes such as cytokinesis,endocytic recycling,actin bundling,and cell ***35 is also involved in neurite outgrowth and turnover of synaptic *** generated brain-specific Rab35 knockout mice to study the physiological roles of RAB35 in brain development and *** mice exhibited defects in anxiety-related behaviors and spatial ***,RAB35 is required for the precise positioning of pyramidal neurons during hippocampal development,and thereby for normal hippocampal *** contrast,layer formation in the cerebral cortex occurred superficially,even in the absence of RAB35,suggesting a predominant role for RAB35 in hippocampal development rather than in cerebral cortex *** studies have suggested an association between RAB35 and neurodegenerative diseases,including Parkinson's disease and Alzheimer's *** this review,we provide an overview of the current understanding of subcellular functions of *** also provide insights into the phys

关键词： endocytosis endosomes hippocampal development neurodegenerative diseases RAB35

Wild Gibbon Optimization Algorithm

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2024年第7期80卷 1203-1233页

作者： Jia Guo JinWang Ke Yan Qiankun Zuo Ruiheng Li Zhou He Dong Wang Yuji sato Hubei Key Laboratory of Digital Finance Innovation Hubei University of EconomicsWuhan430205China School of Information Engineering Hubei University of EconomicsWuhan430205China China Construction Third Engineering Bureau Installation Engineering Co. Ltd.Wuhan430074China Hubei Internet Finance Information Engineering Technology Research Center Hubei University of EconomicsWuhan430205China College of Informatics Huazhong Agricultural UniversityWuhan430070China Faculty of Computer and Information Sciences Hosei UniversityTokyo184-8584Japan

Complex optimization problems hold broad significance across numerous fields and ***,as the dimensionality of such problems increases,issues like the curse of dimensionality and local optima trapping also *** address these challenges,this paper proposes a novel Wild Gibbon Optimization Algorithm(WGOA)based on an analysis of wild gibbon population *** two strategies:community search and community *** community search strategy facilitates information exchange between two gibbon families,generating multiple candidate solutions to enhance algorithm ***,the community competition strategy reselects leaders for the population after each iteration,thus enhancing algorithm *** assess the algorithm’s performance,CEC2017 and CEC2022 are chosen as test *** the CEC2017 test suite,WGOA secures first place in 10 *** the CEC2022 benchmark functions,WGOA obtained the first rank in 5 *** ultimate experimental findings demonstrate that theWildGibbonOptimization Algorithm outperforms others in tested *** underscores the strong robustness and stability of the gibbonalgorithm in tackling complex single-objective optimization problems.

关键词： Complex optimization wild gibbon optimization algorithm community search community competition

Porphyrin/Fullerene Porous Molecular Cocrystal Featuring a Robust One-Dimensional Channel

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Precision Chemistry 2024年第9期2卷 480-487页

作者： Nobuhiro sato Ryojun Toyoda Tetsu sato Zi Lang Goo Shinya Takaishi Koki Chida Takeharu Yoshii Hirotomo Nishihara Kunihisa Sugimoto Ryota Sakamoto Department of Chemistry Graduate School of ScienceTohoku UniversitySendai 980-8578Japan Department of Chemistry Kindai UniversityOsaka 577-8502Japan Institute of Multidisciplinary Research for Advanced Materials Tohoku UniversitySendaiMiyagi 980-8577Japan Institute of Multidisciplinary Research for Advanced Materials and Advanced Institute for Materials Research(WPI-AIMR) Tohoku UniversitySendaiMiyagi 980-8577Japan Division for the Establishment of Frontier Sciences of Organization for Advanced Studies Tohoku UniversitySendai 980-8577Japan

Microporous molecular crystals are promising materials because of their designable porosity as well as their resistance to chemical and other ***,we developed microporous molecular cocrystals by taking advantage of the specific interactions between porphyrins and fullerene ***-crystal X-ray diffraction analysis revealed that one nickel(II)porphyrin interacts with two fullerene molecules to form a two-dimensional honeycomb network with an eclipsed stacking mode,providing onedimensional void *** the pores were activated by heat treatment or mechanical grinding,the prepared cocrystal can incorporate gas and solvent molecules reversibly while maintaining its ***,it retained its single-crystallinity in the presence of water,acid−base,or high *** findings in this study expand the availability of molecular crystals based on intermolecular interactions as porous materials,which are expected to work under conditions that have not been applicable to other molecule-based porous materials.

关键词： Microporous molecular crystal intermolecular interaction gas adsorption chemical stability high-pressure resistance

Inertial mixing of acoustically levitated droplets for time-lapse protein crystallography

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Droplet 2024年第3期3卷 91-101页

作者： Soichiro Tsujino Yohei sato Shichao Jia Michal W.Kepa Sofia Trampari Takashi Tomizaki Division of Biology and Chemistry Paul Scherrer InstitutVilligenSwitzerland Swiss Nanoscience Institute University of BaselBaselSwitzerland Division Scientific Computing Theory and DataPaul Scherrer InstitutVilligenSwitzerland Biozentrum University of BaselBaselSwitzerland Photon Science Division Paul Scherrer InstitutVilligenSwitzerland

Varying the chemical consistency of acoustically levitated droplets opens up an in situ study of chemical and biochemical reactions in small ***,the opti-mization of the mixing time and the minimization of the positional instability induced by solution dispensing are necessary for practical applications such as the study of the transient state of macromolecules crystallography during the ligand binding *** this purpose,we study the inertial mixing in a configuration compatible with the room-temperature crystallography using the acoustic levitation diffractometer,therein solution drops ejected at high velocity collide and coalesce with droplets dis-pensed on acoustically levitated and rotating polymer thin-film sample *** the proposed method,we are able to achieve the mixing time of∼0.1 s for sub-micro and a few microliter *** observed short mixing time is ascribed to the rapid penetration of the solution into the droplets and confirmed by a computational fluid dynamic *** demonstrated accelerated solution mixing is tested in a pilot time-lapse protein crystallography experiment using the acoustic levitation *** results indicate the detection of transient ligand binding state within 2 s after the solution dispensing,suggesting the feasibility of the proposed method for studying slow biochemical processes.

关键词： mixing droplets transient

Manipulating guest-responsive spin transition to achieve switchable fluorescence in a Hofmann-type framework

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2024年第10期67卷 3339-3346页

作者： Xue-Ru Wu Shu-Qi Wu Zhi-Kun Liu Ming-Xing Chen Jun Tao Osamu sato Hui-Zhong Kou Engineering Research Center of Advanced Rare Earth Materials(Ministry of Education) Department of ChemistryTsinghua UniversityBeijing 100084China Institute for Materials Chemistry and Engineering&IRCCS Kyushu University744 MotookaNishi-kuFukuoka 819-0395Japan Key Laboratory of Cluster Science of Ministry of Education School of Chemistry and Chemical EngineeringLiangxiang CampusBeijing Institute of TechnologyBeijing 102488China Analytical Instrumentation Center College of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China

The change of fluorescence emission manipulated by spin state transition attracts considerable attention owing to its potential applications in magneto-optical switching ***,we report two two-dimensional(2D)Hofmann-type spin crossover(SCO)metal-organic frameworks(MOFs)[Fe^(Ⅱ)(PNI)_(2){Ag^(Ⅰ)(CN)_(2)}_(2)]·CHCl_(3)(3Ag·CHCl_(3))and[FeⅡ(PNI)_(2){AuⅠ(CN)_(2)}_(2)]·CHCl_(3)(3Au·CHCl_(3))based on the fluorescent ligand N-(4-pyridylmethyl)-1,8-naphthalimide(PNI).Both complexes exhibit interesting SCO behaviors switched by guest solvent molecules,namely three-step transitions for the solvated complexes and complete onestep hysteretic SCO for the desolvated ones,verified by temperature-dependent magnetic susceptibility measurements,Mossbauer spectra,structural analyses,and differential scanning calorimetry ***,temperature-dependent fluorescence spectra exhibit double peaks(monomer and excimer emission)with both emission peaks change consistent with the change in SCO properties during the solvent molecule *** this study,we integrated guest-responsive SCO behavior into MOFs to manipulate the multistability of spin state and fluorescence switching,providing a rational strategy for the development of stimuli-responsive multifunctional materials.

关键词： spin crossover fluorescence multifunctional materials metal-organic frameworks Hofmann-type