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Elastic direct envelope inversion based on wave mode decomposition for multi-parameter reconstruction of strong-scattering media

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Petroleum Science 2022年第5期19卷 2046-2063页

作者： Pan Zhang Ru-Shan Wu li-Guo Han yong Hu College of Geo-exploration Science and Technology Jilin UniversityChangchun 130026JilinChina Modeling and Imaging Laboratory Earth&Planetary ScienceUniversity of California at Santa CruzSanta CruzCalifornia95064USA School of Resources and Geosciences China University of Mining and TechnologyXuzhou 221008JiangsuChina

The parameter reconstruction of strong-scattering media is a challenge for conventional full waveform inversion(FWI).Direct envelope inversion(DEI)is an effective method for large-scale and strongscattering structures imaging without the need of low-frequency seismic ***,the current DEI methods are all based on the acoustic ***,in real cases,seismic records are the combined effects of the subsurface ***,the study of DEI in elastic media is necessary for the accurate inversion of strong-scattering structures,such as salt *** this paper,we propose an elastic direct envelope inversion(EDEI)method based on wave mode *** define the objective function of EDEI using multi-component seismic data and derive its gradient *** reduce the coupling effects of multi-parameters,we introduce the wave mode decomposition method into the gradient calculation of *** update of Vp is primarily the contributions of decomposed *** approaches on Vs gradient calculation are proposed,*** the petrophysical relation and wave mode decomposition ***,we test the proposed method on a layered salt model and the SEG/EAGE salt *** results show that the proposed EDEI method can reconstruct reliable large-scale Vp and Vs models of strong-scattering salt *** successive elastic FWI can obtain high-precision inversion results of the strong-scattering salt *** proposed method also has a good anti-noise performance in the moderate noise level.

关键词： Direct envelope inversion Full waveform inversion Elastic wave Strong-scattering media Multi-parameter

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Effects of different concentrations of celecoxib on proliferation and cell cycle of SH-Sy-5y cells and its mechanisms In vitro study

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Neural Regeneration Research 2008年第2期3卷 133-137页

作者： Hu Zhou Wei Wang Hongyi Wang Jinghua li Department of Hematology Affiliated Hospital of Qingdao Medical College Qingdao University Qingdao 266003 Shandong Province China Department of Clinical Laboratory Qingdao Municipal Hospital Qingdao 266001 Shandong Province China

BACKGROUND： Highly selective cyclooxygenase-2 （COX-2） inhibitors have recently been approved for the treatment of colon cancer, breast cancer, urinary bladder cancer, and skin cancer. For the highly selective COX-2 celecoxib, the mechanism of action for inhibiting neuroblastoma cells is still uncertain. OBJECTIVE： To observe the influence of different celecoxib concentrations on proliferation and cell cycle of SH-Sy-5y cells in vitro and to reveal potential COX-2-independent mechanisms of celecoxib on SH-Sy-5y cells. DESIGN： Controlled experiment. SETTING： Department of Hematology, Affiliated Hospital of the Qingdao Medical College, Qingdao University, Shandong Province. MATERIALS： The study was performed at the Cerebrovascular Disease Institute of Shandong Province and the Laboratory of Molecular Biology, Affiliated Hospital of Qingdao Medical College, Qingdao University between September 2006 and June 2007. The SH-Sy-5y cell line was obtained from the Department of Molecular Biology, Qingdao Medical College, Qingdao University. Celecoxib was obtained from Pfizer Pharmaceuticals LLC, USA. Coulter DNA PREP reagent kit was purchased from Beckman Coulter, Inc. The antibodies against human Cy.linD1, P21, and P16 were purchased from Santa cruz Biotechnology. METHODS： SH-Sy-5y cells were treated with different concentrations of celecoxib （10, 20, 40, and 80 la mol/L） for 48 hours and comprised the experimental groups. The same concentrations of DMSO （dimethyl sulphoxide） treatment for 48 hours served as the control group. MAIN OUTCOME MEASURES： ① Cellular morphology of cells pre-treated and post-treated with celecoxib by inverted microscopy. ② Methabenzthiazuron assay was used to measure cell proliferation. ③ Cell cycle was measured by flow cytometry after incubation with different celecoxib concentrations for 48 hours. ④Cy.linD1, P16, and P21 protein expression was detected by Western blot analysis. RESULTS： ① Cellular morphology： The shape of SH-Sy-5y cells pre

关键词： neuroblastoma cyclooxygenase celecoxib cy.lins

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Extracellular signal regulated kinases 1/2 signal pathway and responses of astrocytes after diffuse brain injury

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Neural Regeneration Research 2007年第5期2卷 257-261页

作者： Jinxing li Haimei Zhao yu li Chong Wang Jiashan Zhao Xianli Zhu Department of Neurosurgery the Third Affiliated Hospital of Nanchang University （the First Hospital of Nanchang） Nanchang 330008Jiangxi Province China Department of Neurosurgery Union Hospital Affiliated to Tongji Medical College Huazhong University of Science and Technology Wuhan430022 Hubei Province China

BACKGROUND： The treatment of diffuse brain injury during an acute period is focused on relieving degrees of secondary brain injury. Generation and development of pathological changes of secondary brain injury depend on signal conduction, so down-regulating over response of astrocyte through interfering a key.link of signal conduction pathway may bring a new thinking for the treatment of diffuse brain injury. OBJECTIVE： To observe the effect of over activity of extracellular signal regulated kinases 1/2 （ERK1/2） signal pathway on the response of astrocyte during an acute period of diffuse brain injury. DESIGN： Completely randomized grouping and controlled animal study. SETTINGS： Department of Neurosurgery, the Third Affiliated Hospital, Nanchang University; Department of Neurosurgery, Union Hospital Affiliated to Tongji Medical College, Huazhong University of Science and Technology. MATERIALS： A total of 158 healthy male SD rats, of 11 weeks old, weighing 320-370 g, were provided by Experimental Animal Faulty, Tongji Medical College, Huazhong University of Science and Technology. Rabbit-anti-phosphorylated ERK1/2 （pERK1/2） polyclonal antibody was provided by R＆D Company; rabbit-anti-glial fibrillary acidic protein （GFAP） polyclonal antibody, SP immunohistochemical kit and horseradish peroxidase （HRP）-labeled goat-anti-rabbit IgG by Santa cruz Company; specific inhibitor U0126 of ERK1/2 signal pathway by Alexis Company. METHODS： The experiment was carried out in the Laboratory of Neurosurgery, Union Hospital Affiliated to Tongji Medical College, Huazhong University of Science and Technology from September 2004 to March 2006. ① Detection of pERK1/2 expression： A total of 110 rats were randomly divided into sham operation group （n =5）, model group （n =35）, high-dosage U0126 group （n =35） and low-dosage U0126 group （n =35）. Rats in the sham operation group were only treated with incision of epicranium and fixation of backup plate, but not hit. Rats in the model group wer

关键词： brain injuries astrocytes parietal lobe

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IR64品种内残余变异的来源和遗传模式

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中国水稻科学 2007年第2期21卷 131-135页

作者：吴建利施勇烽陈洁 Casiana VERA cruz 庄杰云 Hei LEUNG 郑康乐中国水稻研究所国家水稻改良中心/水稻生物学国家重点实验室浙江杭州3100062 国际水稻研究所昆虫和植物病理系

The phenotypically uniform indica rice variety IR64 was chosen for study of the source and inheritance of within cultivar residual variation using a set of SSR *** heterogeneity in IR64 was identified on the short arm of chromosome 2 involving at least five SSR loci spanning nearly 30 *** SSR variations originated from the parental lines of IR64(IR5657-33-2 /IR2061-465-1-5-5)and were segregating in the selfed bulk seed stock in a Mendelian manner for more than 20 *** study was one of few examples to verify successfully that within cultivar variations of SSR in morphologically uniform selfing crops came from its parental lines,which has immediate and commercial applications including test of seed purity,varietal fingerprinting,and curation and propagation of germplasm collections.

关键词：水稻残余变异异质性微卫星标记

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2.5D SH Wave Propagation in Heterogeneous Crustal Wave Guides Using the Phase Screen Method

2.5D SH Wave Propagation in Heterogeneous Crustal Wave Guide...

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中国科学院地质与地球物理研究所2008学术年会

作者： Weijia Sun,li-yun Fu,and Ru-Shan Wu State Key Laboratory of lithospheric Evolution Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029,China Modehng and Imaging Laboratory Institute of Geophysics and Planetary Physics University of California,Santa cruz 1156 High Street Santa cruz,California 95064

One-way approximations for regional phases slice the half-space crastal wave guide into a number of slabs perpendicular to the propagation direction;the Moho discontinuity can be easily treated as a perturbation from the crustal background. The advantage of one-way propagation methods is their great saving of computing time and memory compared to full-waveform numerical methods,especially for 3D *** this article,we present general 2.5D SH formulas for the thin-slab method and a generalized screen propagator(GSP) for simulating SH wave propagation in the heterogeneous half-space crustal wave *** of numerical results with a finite-difference(FD) algorithm for a standard flat crustal model show excellent agreement,demonstrating the validity and accuracy of the 2.5D GSP for the half-space *** then compare the curves of energy attenuation calculated by the 2D and 2.5D *** comparison shows that the energy attenuation of the 2.5D case is about 1.5-3 times greater than that of the 2D case when the trapped mode is *** SH screen propagator is also used to simulate two laterally unvarying (in the y direction) crustal models,showing the path effects on regional wave propagation.

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Bridging sciatic nerve gap using tissue-engineered nerves constructed with neural tissue-committed stem cells derived from bone marrow

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Neural Regeneration Research 2009年第5期4卷 344-349页

作者： Zhiying Zhang Congli Ren Chuansen Zhang Fang liu liang li Department of Anatomy Second Military Medical University of Chinese PLA Shanghai 200433 China

BACKGROUND： Schwann cells are the most commonly used cells for tissue-engineered nerves. However, autologous Schwann cells are of limited use in a clinical context, and allogeneic Schwann cells induce immunological rejections. Cells that do not induce immunological rejections and that are relatively easy to acquire are urgently needed for transplantation. OBJECTIVE： To bridge sciatic nerve defects using tissue engineered nerves constructed with neural tissue-committed stem cells （NTCSCs） derived from bone marrow; to observe morphology and function of rat nerves following bridging; to determine the effect of autologous nerve transplantation, which serves as the gold standard for evaluating efficacy of tissue-engineered nerves. DESIGN, TIME AND SETTING： This randomized, controlled, animal experiment was performed in the Anatomical Laboratory and Biomedical Institute of the Second Military Medical University of Chinese PLA between September 2004 and April 2006. MATERIALS： Five Sprague Dawley rats, aged 1 month and weighing 100-150 g, were used for cell culture. Sixty Sprague Dawley rats aged 3 months and weighing 220-250 g, were used to establish neurological defect models. Nestin, neuron-specific enolase （NSE）, glial fibrillary acidic protein （GFAP）, and S-100 antibodies were provided by Santa cruz Biotechnology, Inc., USA. Acellular nerve grafts were derived from dogs. METHODS： All rats, each with 1-cm gap created in the right sciatic nerve, were randomly assigned to three groups. Each group comprised 20 rats. Autograft nerve transplantation group： the severed 1-cm length nerve segment was reverted, but with the two ends exchanged; the proximal segment was sutured to the distal sciatic nerve stump and the distal segment to the proximal stump. Blank nerve scaffold transplantation group： a 1-cm length acellular nerve graft was used to bridge the sciatic nerve gap. NTCSC engineered nerve transplantation group： a 1-cm length acellular nerve graft, in which NTCSCs were in

关键词： tissue-engineered nerve nerve damage sciatic nerve neural tissue-committed stem cells d

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One-pot synthesis of Au@Pt star-like nanocrystals and their enhanced electrocatalytic performance for formic acid and ethanol oxidation

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Nano Research 2018年第6期11卷 3222-3232页

作者： yi Peng lidong li Ran Tao lingyu Tan Mengna Qiu lin Guo Key Laboratory of Bio-lnspired Smart Interfacial Science and Technology of Ministry of Education School of Chemistry and Environment Beihang University Beijing 100191 China Department of Chemistry and Biochemistry University of California 1156 High Street Santa Cruz California 95064 USA

The current bottleneck facing further developments in fuel cells is the lack of durable electrocatalysts with satisfactory activity. In this study, a simple and fast one-pot wet-chemical method is proposed to synthesize novel Au@Pt star-like bimetallic nanocrystals （Au@Pt SLNCs） with a low Pt/Au ratio of 1：4, which show great electrocatalytic properties and outstanding stability toward the electro-oxidation reactions commonly found in fuel cells. The star-like Au core （90±20 nm） is partially coated with 5 nm Pt nanocluster shells, a morphology which creates a large amount of boundaries and edges, thus tuning the surface electronic structure as demonstrated by X-ray photoelectron spectroscopy and CO-stripping measurements. This promotes excellent electrocatalytic performance towards the formic acid oxidation reaction in acidic media and the ethanol oxidation reaction in alkaline media, compared to commercial Pt or Au@Pt triangular nanoprisms, in which the Au core is fully coated by a Pt shell. Au@Pt SLNCs have the highest current density within the dehydrogenation potential range, needing the least potential to achieve a certain current density as well as the highest long-term stability. Because of the small amount of Pt usage, very fast synthesis, excellent electrocatalytic activity and durability, the proposed Au@Pt SLNCs have a promising practical application in fuel cells.

关键词： Au@Pt core-shell nanocrystals electrocatalyst formic acid ethanol oxidation

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Modified combustion synthesis of g-liAlO_2 using metal oxides

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Transactions of Nonferrous Metals Society of China 2018年第9期28卷 1793-1800页

作者： Daniel cruz H.B.ORTIZ-OliVEROS L.M.PéREZ-DíAZ R.M.FLORES-ESPINOSA G.ROSANO-ORTEGA Facultad de Ingeniería Química Benemérita Universidad Autónoma de Puebla14 Sur y San ClaudioCiudad UniversitariaC.P.72570Cd.PueblaMéxico Instituto Nacional de Investigaciones Nucleares Dirección de Investigación TecnológicaApartado Postal 18-102711801 MéxicoDFMéxico Universidad Popular Autónoma del Estado de Puebla 21 Sur no.1103Colonia SantiagoC.P.72410PueblaMéxico

An alternative solution for the direct formation of?-liAlO2 was presented by a modified combustion method,to apply it to rather simple systems,utilizing non-oxidizer compounds such as Al2O3 and liOH,and urea as ***2 was prepared via non-stoichiometric 1:1,1.5:1 and 2:1 of li/Al molar ratios at 900 and 1000°C for 5 *** and structural characterization ofγ-liAlO2 was ***,the effect of different li/Al molar ratios on material morphology and its stability before high gamma radiation gradients was *** results showed that the crystal structures of the obtained powders wereγ-liAlO2 and?-liAlO2,depending on the li/Al molar *** results obtained demonstrate that?-liAlO2 microbricks,polyhedral and laminar shapes can be successfully synthesized with the proposed method and without any subsequent ***,gamma irradiation showed that the?-liAlO2 obtained does not decompose,forming only small amounts of *** can be established that the irradiation produces consolidation,which is not favourable for an efficient extraction of ***,it could be demonstrated that nitrate precursors are not necessary in the combustion method to produceγ-liAlO2 with high purity.

关键词： urea oxide combustion lithium aluminate ceramic

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Wnt pathway in the formation of ischemic brain injury Interventional pathway of basic fibroblast growth factor

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Neural Regeneration Research 2007年第7期2卷 395-398页

作者： Xuesong Xing Weili Lü li GUO Department of Anatomy School of Basic Medicine Shenyang Medical College Shenyang 110034 Liaoning Province China Department of Pathology School of Basic Medicine Shenyang Medical College Shenyang 110034 Liaoning Province China Central Laboratory School of Basic Medicine Shenyang Medical College Shenyang 110034 Liaoning Province China

BACKGROUND： Basic fibroblast growth factor （bFGF） can reduce neuronal apoptosis following ischemia/reperfusion （I/R） injury. Mechanism of the phenomenon should be elucidated.OBJECTIVE： The goal of this study was to observe the effect of bFGF on the expressions of Dickkopf-1（DKK-1） and β-catenin in the Wnt pathway in hippocampal tissue of rats following brain I/R injury, in order to investigate the role of Wnt pathway in the formation ofischemic brain injury.DESIGN： Randomized controlled experiment.SETTING： Shenyang Medical College.MATERIALS： Thirty healthy 3 months old male Wistar rats, weighing 300 - 350 g, were provided by the Experimental Animal Center of Shenyang Medical College. Thirty rats were randomized into sham-operation group, model group and treatment group. Goat anti-rat monoclonal antibody β-catenin was purchased from SANTA cruz Company. BFGF was developed by Beijing SL Pharmaceutical Co., Ltd.METHODS： This experiment was carried out in the Shenyang Medical College between November 2005 and May 2006. ①Focal brain I/R by suture-occluded method was modeled in rats in the treatment group and model group. Their middle cerebral artery was occluded 1 hour and reperfused for 24 hours. While in the sham-operation group, only the right common carotid artery and external carotid artery of rats were occluded for 90 minutes. ② The rats in the treatment group were intraperitoneally injected with 10 μg/kg bFGF,and those in the other groups were intraperitoneally injected with the same amount of saline.MAIN OUTCOME MEASURES： Following I/R 48 hours, the expressions of β-catenin and Dickkopf-1 mRNA in the neurons of hippocampal CA1 region by immunohistochemical SABC and ***： Following I/R 48 hours, the expressions of β-catenin and Dickkopf-1 mRNA in the neurons of hippocampal CA1 region was evaluated by means of immunohistochemical SABC and RT-PCR. ① Expression of DKK-1 mRNA in the sham-operation group was at low level, it was significantly highe

关键词： fibroblast growth factor 2 brain ischemia reperfusion injury glycoproteins hippocampus apoptosis

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Coexistence of dopamine-beta-hydroxylase and activated protein-2 alpha in rat cerebellar Purkinje cells

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Neural Regeneration Research 2009年第6期4卷 431-435页

作者： Kejian Wang Wei li Shanquan Sun Zhongqin Ren Guiqiong He Department of Human Anatomy Coflege of Basic Medicine Chongqing Medical University Chongqing 400016 China Institute of Neuroscience Chongqing Medical University Chongqing 400016 China

BACKGROUND： Tyrosine hydroxylase and phenylethanolamine-n-methyl transferase expression coexist in Purkinje cells of the rat cerebellum. Numerous reports have also been published addressing whether dopamine-beta-hydroxylase （DBH） expression exists in cerebellar Purkinje cells. OBJECTIVE： To investigate the coexistence of DBH and activator protein-2α expression in rat cerebellar Purkinje cells. DESIGN, TIME AND SETTING： A cell morphological study was performed at the Institute of Neuroscience, Chongqing Medical University, China in May 2007. MATERIALS： Ten healthy Wistar rats, of either gender, aged 14 weeks, served as experimental animals. Rabbit anti-mouse DBH, goat anti-mouse activator protein-2α and rabbit anti-mouse β-actin （Santa cruz Biotechnology, Inc., USA）, horseradish peroxidase-labeled goat anti-rabbit IgG, FITC-labeled mouse anti-rabbit IgG, and Cy3-labeled mouse anti-goat IgG （Boster, Wuhan, China）, were used in this study. METHODS： Immunohistochemical staining was used to measure the expression of DBH or activator protein-2α, with double-label immunofluorescence being employed to determine coexpression of both, in the cerebellum of 5 randomly selected rats. Western blot assay was utilized to determine the expression of DBH and activator protein-2α in the cerebellum of the remaining 5 rats. MAIN OUTCOME MEASURES： Expression, localization and coexistence of DBH and activator protein-2α in the cerebellum were measured separately. RESULTS： Immunohistochemical staining demonstrated that cerebellar Purkinje cells stained positive for DBH and activator protein-2α. Western blot assay also demonstrated DBH and activator protein-2α expression in the cerebellum. Double-labeling immunofluorescence showed the coexistence of DBH and activator protein-2α in cerebellar Purkinje cells. CONCLUSION： Norepinephrine and activator protein-2α coexist in rat cerebellar Purkinje cells.

关键词： Purkinje cells cerebellum dopamine-beta-hydroxylase activator protein-2α

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