|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Component azimuths of the CEArray stations estimated from P-wave particle motion显示文摘The recently built China Digital Seismic Network consists of the China National Digital Seismic Network (CNDSN),31 regional seismic networks and several small aperture arrays with more than 1 000 stations including 850+ broadband stations.It forms a gigantic seismic array that provides an unprecedented opportunity to study the Earth's deep interior besides its routine task of seismic monitoring.Many modern seismic studies rely on rotation of vertical and horizontal components in order to separate different types of seismic waves.Knowledge of the orientations of the two horizontal components thus is important to perform a correction rotation.We analyzed particle motions of teleseismic P waves recorded by the network and used them to estimate the northcomponent azimuth of each station.An SNR-weighted-multi-event method was introduced to obtain component azimuths that best explain the P-wave particle motions of all the events recorded at a station.The method provides robust estimates including a measurement error calculated from background noise levels.We found that about one third of the stations have some sort of problems,including misorientation of the two horizontal components,mislabeling and polarity reversal in one or more components.These problems need to be taken into account for any rotation based seismic studies. | Fenglin Niu Juan Li | 2011 | Earthquake Science2011，24，1： | 43 |
| 2 | Slip rate along the Lijiang-Ninglang fault zone estimated from repeating microearthquakes显示文摘Seismicity 并且沿着在 1999 和 2006 之间的 Lijiang-Ninglang 差错地区滑动率被调查,波形数据由云南数字地震网络记录了。由双差别方法的重定位的 seismicity 清楚地展出在北、南部的片断之间的不同特征。超过 76% 地震在丽江区域附近发生在差错的南部的片断。重定位的 seismicity 看起来反映学习区域的外壳的速度结构。用跨关联的分析,我们识别了显示出高波形类似的 92 件马甲和 70 根多重谱线的一个总数。大多数这些序列是非周期的,复发间隔从一些分钟变化到几百天。用在学习时期上定期发生了的二个序列,我们获得了一个差错在 ∼23 km 滑动约 5 mm/a 的率,在对的好同意地质并且表面 GPS 测量。 | LI Le CHEN QiFu NIU FengLin FU Hong LIU RuiFeng HOU YanYan | 2009 | Chinese Science Bulletin2009，54，3： | 16 |
| 3 | Receiver function study of the crustal structure of Northeast China:Seismic evidence for a mantle upwelling beneath the eastern flank of the Songliao Basin and the Changbaishan region显示文摘Northeast China is a unique place to study intra-plate volcanism.We analyzed P-wave receiver function data recorded by 111 permanent broadband seismic stations in Northeast China.The results show that the crustal thickness varies from 27.9 km beneath the eastern flank of the Songliao Basin to 40.7 km beneath the Great Xing'an Range region.The large depth variations of the Moho can be largely but not completely explained by surface topography.The residual Moho depth calculated based on the Airy's isostasy model indicates that the Moho is dynamically uplifted by <3 km beneath the eastern flank of the Songliao Basin and the Changbaishan region.We suggest that a mantle upwelling,which has been proposed by several recent seismic studies,might have caused the uplift. | Huafeng Liu Fenglin Niu | 2011 | Earthquake Science2011，24，1： | 9 |
| 4 | Anatomical variation of infra-pyloric artery origination: A prospective multicenter observational study (IPA-Origin)显示文摘Objective: Infra-pyloric artery(IPA) is an important anatomical landmark in treatment of gastric cancer and is the key vessel for pylorus-preserving gastrectomy and subgroup of infra-pyloric lymph nodes. However, its anatomical variation is not thoroughly understood. Our study aimed to clarify the origination of the IPA.Methods: We did this prospective, multicenter, open-label, observational study at gastric surgery departments of34 hospitals in China. Gastric cancer patients aged 18 years or older and scheduled to undergo elective total or distal gastrectomy were assigned. During the surgery, IPA dissecting and exposing the origination point with photographs or video clips were required. The primary outcome was the origination of the IPA. Analysis of variance, χ~2 tests and Fisher's tests were used to analyze the differences between groups. The study is registered at Clinicaltrials.gov(No. NCT03071237).Results: Between May 8 and July 31, 2017, 429 patients were assigned for the study, and 419(97.7%) patients had the IPA dissected and recorded through photograph or video and were included in the primary outcome analysis. The median age was 62 years old, and 73.7% were male. Among the patients, 78.5% received laparoscopic surgery. Single IPA origination was identified in 398(95.0%) patients, including gastroduodenal artery(GDA) in154(36.8%) patients, anterior superior pancreaticoduodenal artery(ASPDA) in 130(31.0%) patients, and right gastroepiploic artery(RGEA) in 114(27.2%) patients. Fifteen(3.6%) patients were identified with multiple IPA and 6(1.4%) patients were identified as IPA absence. The differences in the distribution of surgical approach(P=0.003) and geographic area(P=0.030) were statistically significant. No difference was shown in sex, age,gastrectomy type, tumor location, and clinical T, N and M stage.Conclusions: Our study found that the IPA originates from GDA, ASPDA and RGEA in similar proportions.Laparoscopic surgery may be more helpful in dissection of the IPA than open surgery. | Rulin Miao Jianjun Qu Zhengrong Li Daguang Wang Jiang Yu Weidong Zang Yong Li Fenglin Liu Jian Zhang Wu Song Kai Ye Su Yan Wei Wang Shuangyi Ren Lu Zang Changqing Jing Li Zhang Kuan Wang Weihua Fu Lin Fan Bin Liang Gang Zhao Jun Cai Li Yang Jiaming Zhu Jun You Kun Yang Qingxing Huang Zhaojian Niu Ning Ning Xingfeng Qiu Gang Ji Feng Liang Hua Huang Chao Gao Fei Shan Shuangxi Li Yongning Jia Lianhai Zhang Xiangji Ying Yan Zhang Zhaode Bu Xiangqian Su Gang Zhao Ziyu Li Jiafu Ji | 2018 | Chinese Journal of Cancer Research2018，30，5： | 5 |
| 5 | Semiannual velocity variations around the 2008 M_w 7.9 Wenchuan Earthquake fault zone revealed by ambient noise and ACROSS active source data显示文摘We continuously monitor the long-term seismic velocity variation of one of the major ruptured faults of the devastating 2008 Mw7.9 Wenchuan earthquake in China from July 2009 to January 2012,jointly using accurately controlled routinely operated signal system active source and seismic noise-based monitoring technique.Our measurements show that the temporal velocity change is not homogeneous and highly localized in the damaged fault zone and the adjacent areas.Velocity variations from the active and passive methods are quite consistent,which both are characterized by ±0.2 % seasonal variation,with peak and trough at winter and summer,respectively.The periodic velocity variation within fault zone exhibits remarkably positive correlation with barometric pressure with stress sensitivity in the order of 10-6Pa-1,suggesting that the plausible mechanism might be the crack density variation of the shallow subsurface medium of the damaged fault zone in response to the cyclic barometric pressure loading. | Haichao Chen Hongkui Ge Fenglin Niu | 2014 | Earthquake Science2014，27，5： | 4 |
| 6 | Imaging the mantle transition zone beneath eastern and central China with CEArray receiver functions显示文摘We analyzed a total of 37 427 receiver-function data recorded by national and regional broadband seismic networks of the China Earthquake Administration to study the mantle transition zone beneath eastern and central China.Significant topography on both the 410-km and 660-km discontinuities was clearly imaged in the 3D volume of CCP (common-conversion-point) stacked images that cover an area of 102.5 E-122.5 E and 22.0 N-42.0 N.3D crustal and mantle velocity models were used in computing the Ps time moveouts to better image the absolute depths of the two discontinuities.We found that the 660-km discontinuity is depressed up to 25 km along the east coast of China,indicating the presence of the subducted Pacific slab in the region.More interestingly,a double 660-km was observed beneath the Huanghai Sea,which was not seen from the 410-km discontinuity.We found a strong and localized anomaly beneath the Quaternary Datong volcano located at the northeastern edge of the Ordos Plateau in North China.The 410-km is depressed by as much as 15 km beneath the volcano.If the amount of the depression is caused by unmodeled low velocity anomaly in the upper mantle,it requires either a strong (4%-8%) localized low velocity anomaly near the lithosphere-asthenosphere boundary or ~1.5% low velocity column across the entire upper mantle above the 410-km.The latter could suggest a deep origin of the Datong volcano,although it was usually attributed to edge-driven convection by most of the literatures. | Xinling Wang Fenglin Niu | 2011 | Earthquake Science2011，24，1： | 4 |
| 7 | Rupture of the 2004 Sumatra-Andaman earthquake inferred from direct P-wave imaging显示文摘The Sumatra-Andaman earthquake on December 26, 2004 is the first well recorded gigantic earthquake (moment magnitude MW 9.3) by modern broadband seismic and Global Positioning System networks. The rich seismic and geodetic recordings have documented unprecedented details about the earthquake rupture, coseismic and postseismic deformations. This is a report of detailed images of the rupture process using the first-arriving compressional waves recorded by the China National Digital Seismic Network (CNDSN). An improved imaging condition was employed to account for the sparse distribution of the CNDSN stations. The resulting images are consistent with the major rupture features reported by previous seismic and geodetic studies. It is found that the earthquake rupture initiated at offshore of northwestern Sumatra and propagated in the north northwest direction at a speed of 2.7 ± 0.2 km/s. The rupture continued for at least 420 s and extended about 1200-1300 km along the Andaman trough with two bursts of seismic energy. | LIU Ning CHEN QiFu NIU FengLin CHEN Yong | 2007 | Chinese Science Bulletin2007，52，14： | 3 |
| 8 | 帕克菲尔德地区圣安德烈斯断层强度变化的远距离影响因素显示文摘 | Taka’aki Taira Paul G.Silver Fenglin Niu Robert M.Nadeau 左玉玲 | 2009 | 国际地震动态2009，，11： | 2 |
| 9 | Large slip rate detected at the seismogenic zone of the 2008 M_W7.9 Wenchuan earthquake显示文摘Repeating microearthquakes were identified along the edge of the rupture area of the 2008 MW7.9 Wenchuan earthquake.Slip rates at depths derived from seismic moments and recurrence intervals are found to be systematically larger than those observed at surface.This large deep slip rate may explain the odds about the occurrence of this unanticipated event.Our observations here suggested that seismic hazard could be underestimated if surface measurements alone are employed. | Qifu Chen Le Li Fenglin Niu Jinrong Su | 2011 | Earthquake Science2011，24，1： | 2 |
| 10 | Anomalous SmKS induced by postcritical reflection and refraction at the core-mantle boundary显示文摘Earth’s outer core is generally thought to be a well-mixed liquid consisting mostly of iron and a small amount of lighter elements.Recent seismic studies using Sm KS waves show that the top a few hundred kilometers of the outer core possess a P-wave velocity slightly lower than the PREM model,which cannot be explained by self-compression of a chemically homogeneous outer core.We investigated the Sm KS waveforms of a deep earthquake occurring beneath South America recorded by a large and dense seismic array in China,and measured the differential arrival times of the Sm KS pairs.We found significant waveform distortion of the Sm KS caused by postcritical refraction and reflection at the core-mantle boundary.This waveform distortion can introduce significant bias to the measured differential times,leading to incorrect estimate of P-wave velocity of the outer core.Whether stable stratification is occurring in outer core or not requires further seismic investigations. | Liwei Wang Fenglin Niu | 2019 | Science Bulletin2019，64，21： | 2 |
| 11 | Sedimentary structure of the western Bohai Bay basin and other basins in North China revealed by frequency dependent P-wave particle motion显示文摘High-resolution seismic models of sediment basins are critical inputs for earthquake ground motion prediction and petroleum resource exploration.In this study we employed a newly developed technique that utilizes the frequency-dependent nonlinear P-wave particle motion to estimate sedimentary structure beneath the Bohai Bay basin.A recent study suggests that the delay of the P wave on the horizontal component relative the vertical component and its variations over frequency are caused by interference of the direct P wave with waves generated at the sediment base.The frequency-dependent delay time can be used to constrain sediment thickness and seismic velocity beneath recording stations.We measured the particle motions of teleseismic P waves recorded by 249 broadband stations of the North China Array,which covers the western Bohai Bay basin and its surrounding areas.We found that the P waves of 90 stations inside the Bohai Bay basin and other local basins within the Taihang and Yanshan mountain ranges exhibit significant frequency-dependent nonlinear particle motions,and used the particle motion data to invert the sediment thickness(Z0)and surface S-wave velocity(β0).The estimated sediment thickness inside the Bohai Bay Basin varies from 1.02 km to 3.72 km,with an average of 3.20 km,which roughly agrees with previous active source studies. | Chenhao Yang Fenglin Niu | 2019 | Geodesy and Geodynamics2019，10，5： | 1 |
| 12 | Spatial variations of the 660-km discontinuity in the western Pacific subduction zones observed from CEArray triplication data显示文摘We examined the spatial variation of velocity structures around the 660-km discontinuity at the western Pacific subduction zones by waveform modeling of triplication data.Data from two deep earthquakes beneath Izu-Bonin and Northeast China are used.Both events were well recorded by a dense broadband seismic network in China (CEArray).The two events are located at approximately the same distance to the CEArray,yet significant differences are observed in their records:(1) the direct arrivals traveling above the 660-km discontinuity (AB branch) are seen in a different distance extent:~29° for the NE China event,~23 for Izu-Bonin event;(2) the direct (AB) and the refracted waves at the 660-km (CD branch) cross over at 19.5° and 17° for the NE China and the Izu-Bonin event,respectively.The best fitting model for the NE China event has a broad 660-km discontinuity and a constant high velocity layer upon it;while the Izu-Bonin model differs from the standard IASP91 model only with a high velocity layer above the 660-km discontinuity.Variations in velocity models can be roughly explained by subduction geometry. | Baoshan Wang Fenglin Niu | 2011 | Earthquake Science2011，24，1： | 1 |
| 13 | Characterization of the D' beneath the Galapagos Islands using SKKS and SKS waveforms显示文摘SKS and SKKS waveforms from 16 events occurring between 2003 and 2005 in the Tonga Trench that were recorded by the BOLIVAR array are analyzed to determine the structure of the D' layer beneath the Galapagos Islands.248 differential travel-time residuals of SKKS-SKS are measured and reveal a region of positive residuals of differential travel times in the northeast portion of the sampled region.Analyzing correlation statistics between the measured SKKS-SKS residuals and the observed absolute travel time delay of the individual SKS and SKKS phases for two events with high data quality,we determine that the residual differential travel time is due to excess low velocity along the SKKS raypaths.First order modeling of three potential low velocity structures,ultra-low velocity zones (ULVZ),plume conduit,D structure,indicates that the observed SKKS-SKS residuals can be best explained by a low velocity anomaly within the D' layer.To determine the presence of lower mantle anisotropy,amplitude ratios of the radial and transverse component of SKS and SKKS waveform are calculated and compared.Regions with significant presence of seismic anisotropy are interpreted as the edge of the flow field associated with a hypothetical mantle upwelling. | Elizabeth Vanacore Fenglin Niu | 2011 | Earthquake Science2011，24，1： | 1 |
| 14 | Active source monitoring of cross-well seismic travel time for stress-induced changes 显示文摘 | SILVER Paul G DALEY Thomas M NIU FengLin | 2007 | Bulletin of the Seismological Society of America2007，97，1： | 1 |
| 15 | Contribution of beef base to aroma characteristics of beeflike process flavour assessed by descriptive sensory analysis and gas chromatography olfactometry and partial least squares regression显示文摘 | Shiqing Song Xiaoming Zhang Khizar Hayat Meigui Huang Ping Liu Eric Karangwa Fenglin Gu Chengsheng Jia Shuqin Xia Zuobing Xiao Yunwei Niu | 2010 | Journal of Chromatography A2010，，49： | 1 |
| 16 | A chloride efflux transporter,BIG RICE GRAIN 1,is involved in mediating grain size and salt tolerance in rice显示文摘Grain size is determined by the size and number of cells in the grain.The regulation of grain size is crucial for improving crop yield;however,the genes and molecular mechanisms that control grain size remain elusive.Here,we report that a member of the detoxification efflux carrier/Multidrug and Toxic Compound Extrusion(DTX/MATE)family transporters,BIG RICE GRAIN 1(BIRG1),negatively influences grain size in rice(Oryza sativa L.).BIRG1 is highly expressed in reproductive organs and roots.In birg1 grain,the outer parenchyma layer cells of spikelet hulls are larger than in wild-type(WT)grains,but the cell number is unaltered.When expressed in Xenopus laevis oocytes,BIRG1 exhibits chloride efflux activity.Consistent with this role of BIRG1,the birg1 mutant shows reduced tolerance to salt stress at a toxic chloride level.Moreover,grains from birg1 plants contain a higher level of chloride than those of WT plants when grown under normal paddy field conditions,and the roots of birg1 accumulate more chloride than those of WT under saline conditions.Collectively,the data suggest that BIRG1 in rice functions as a chloride efflux transporter that is involved in mediating grain size and salt tolerance by controlling chloride homeostasis. | Zhijie Ren Fenglin Bai Jingwen Xu Li Wang Xiaohan Wang Qian Zhang Changxin Feng Qi Niu Liying Zhang Jiali Song Fang Bao Liangyu Liu Yikun He Ligeng Ma Wang Tian Congcong Hou Legong Li | 2021 | Journal of Integrative Plant Biology2021，63，12： | 1 |
| 17 | Mantle and crust anisotropy in the eastern China region inferred from waveform splitting ofSKS and PpSms显示文摘 | Takashi Lidaka Fenglin Niu | 2001 | Earth Planets Space2001，53，： | 1 |
| 18 | Photodegradation of PCDD/Fs adsorbed on spruce ( Picea abies (L.) Karst.) needles under sunlight irradiation显示文摘 | Junfeng Niu Jingwen Chen B. Henkelmann Xie Quan Fenglin Yang A. Kettrup K.-W. Schramm | 2002 | Chemosphere2002，，9： | 1 |
| 19 | Preface to the special issue on recent advances of deep structure,seismic anisotropy and seismotectonics in China显示文摘A workshop on crustal structure and seismotectonics was held on the Chinese Teacher's Day,the September 10th of 2011,in the city Lanzhou,China.Scientists and graduate students from Chinese Academy of Sciences。 | Dongping Wei Fenglin Niu Yuan Gao Xuzhang Shen | 2012 | Earthquake Science2012，25，1： | 0 |
| 20 | Constraints on rigid zones and other distinct layers at the top of the outer core using CMB underside reflected PKKP waves显示文摘Clear PKKP,a P wave reflects of the core-mantle boundary on the core side,is recorded by the transcontinental USArray from two deep earthquakes occurred in South America and Tonga,and one intermediate-depth earthquake in the Hindu Kush region.We compare the PKKP waveforms with the direct P waves to investigate the fine structures near the core-mantle boundary,with a primary focus on the core side.We find no evidence for the existence of a sedimentary layer of lighter elements with a thickness above a few hundreds of meters beneath the reflection points of the two deep events,which are located at the Ninety-East Ridge and South Africa.On the other hand the PKKP wave duration of the Hindu Kush event is almost twice as long as that of the P wave,suggesting that multiple reflections may be occurring at the core-mantle boundary located beneath the Antarctic,which is located inside the so-called tangent cylinder of the outer core.The tangent cylinder is an imaginary cylindrical region suggested by geodynamics studies,which has different flow pattern and may have a higher concentration in lighter elements as compared to the rest of the outer core.One possible explanation of the elongated PKKP is a thin distinct layer with a thickness of a few kilometers at the top of the outer core,suggesting that precipitation of lighter elements may occur at the core-mantle boundary.Our data also indicate an extremely low QP of 312,approximately 40%of the PREM average(~780),within the large-scale low-velocity anomaly in the lowermost mantle beneath Pacific. | Fenglin Niu Cindi Kelly Jianping Huang | 2012 | Earthquake Science2012，25，1： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员