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| 1 | 高分辨率SAR数据在三峡库区滑坡监测中的应用显示文摘结合当前雷达差分干涉测量(D-InSAR)技术的发展,以TerraSAR-X数据为例,重点研究高分辨率SAR数据在三峡库区滑坡监测中的应用.实验结果表明,利用高分辨率SAR影像幅度和差分干涉相位信息,可以成功地检测到三峡库区滑坡发生所处的时间段、地点以及形变,验证了高分辨率雷达数据InSAR技术进行滑坡检测的有效性.针对三峡库区大气效应对差分干涉的影响,应用时间序列InSAR技术进行滑坡体的缓慢形变监测,结果表明滑坡体形变大小和三峡水库的水位变化有一定的关系,可以为滑坡预警提供重要依据.高分辨率TerraSAR-X数据和中分辨率ASAR数据的形变监测结果的分析比较表明,由于TerraSAR-X数据具有较短波长以及较高的时间和空间分辨率,能够取得更好的形变监测效果,可以应用于滑坡和泥石流等地质灾害的监测和预警等方面的工作. | 廖明生 唐婧 王腾 Timo BALZ 张路 | 2012 | 中国科学:地球科学2012,42,2: | 57 |
| 2 | 血管性认知损害诊断的进一步规范化:血管性认知损害分类共识研究组指南显示文摘引言血管性认知损害(vascular cognitive impairment,VCI)诊断共识的缺乏(体现为多种不同评估方案的使用),妨碍了对其理解和治疗的推进.多个国家的大量临床医生和研究人员参与了2个阶段血管性认知损害分类共识研究(Vascular Impairment of Cognition Classification Consensus Study,VICCCS),旨在就VCI的诊断原则(VICCCS-1)和诊断方案(VICCCS-2)达成一致意见.本文提供了VICCCS-2的相关内容.方法使用VICCCS-1达成的原则和已发表的诊断指南作为在线德尔菲(Delphi)调查的参考基点,以期对VCI的临床诊断达成共识.结果共进行了6轮调查,每轮有65~79名专家参与,他们就VICCCS修订的轻度和重度VCI的诊断指南达成共识,并肯定了美国国立神经疾病与卒中研究所-加拿大卒中网(National Institute of Neurological Disorders and Stroke–Canadian Stroke Network,NINDS-CSN)发布的神经心理学评估方案和对影像学检查的推荐意见.讨论VICCCS-2建议规范化应用NINDS-CSN推荐的神经心理学和影像学评估方案诊断VCI,以促进研究协作. | Olivia A. Skrobot Sandra E. Black Christopher Chen Charles DeCarli Timo Erkinjuntti Gary A. Ford Rajesh N. Kalaria John O'Brien Leonardo Pantoni Florence Pasquier Gustavo C. Roman Anders Wallin Perminder Sachdev Ingmar Skoog the VICCCS group Yoav Ben-Shlomo Anthony P. Passmore Seth Love Patrick G. Kehoe 朱婷珂 徐俊 | 2018 | 国际脑血管病杂志2018,26,4: | 58 |
| 3 | 捻针时真、假穴不同中枢激活效应的脑功能MRI显示文摘目的 利用功能磁共振 (fMRI)观察捻针针刺方法对大脑的作用。方法 用盲法随机分别针刺 13例正常人左侧太冲、丘墟和假穴 ,手法采用捻针和不捻针 ,利用 1 5TMR仪行全脑功能成像 ,用SPM99b分析图像。结果 发现只在真穴捻针针刺时有更强的激活效应 ,有显著性意义的Brodmann激活区域为 :针刺太冲穴激活了左右顶叶BA4 0区 ,右额叶BA4 7和 10区 ,右丘脑 ,左小脑 ;针刺丘墟穴激活了左右顶叶BA4 0区 ,右顶叶BA2区 ,左额叶BA9、10、4 4区 ,左岛叶BA13区 ,左颞叶BA2 2区 ,右颞叶BA4 2区 ,右壳核 ,左小脑。两真穴激活部位部分相同 ,部分不同。在假穴捻针对不捻针的研究中 ,未见到有显著性意义的激活区。结论 真穴捻针时可能对皮层神经活动有较特异的作用 ,而假穴未观察到此种现象 ,推测这可能是针刺治疗作用的机制之一。 | 方继良 Timo Krings Juergen Weidemann Ingo Meister Armin Thron | 2004 | 中华放射学杂志2004,38,12: | 40 |
| 4 | 若尔盖西部草甸的基本类型、特点及近几十年来的变化显示文摘20 0 0年 8月对若尔盖西部草地的调查 ,确定了该地 18个草地群丛类型 (不包括典型的沼泽植被 ) .经群丛间Pearson最大相关系数配合生境作图 ,将该地区的草地群丛分成 3大类 ,即沼生草地、中生性草甸和旱生性草地 .各群丛的SW指数、物种丰富度、地上生物量、裸地面积按照生境序列作图 ,显示中生性草甸具有最高的物种丰富度和地上生物量 .群丛C和J分别是沼生和旱生植被与中生性草甸之间的拐点式过渡类群 ,其物种丰富度明显比周围的群丛低 ,生境转换关键种分别为鹅绒委陵菜和垂穗披碱草 .在草地物种组成上 ,杂类草占 81.3% ,莎草类仅占 6 .8% ;群丛建群种方面 ,杂类草占 6 1% ,莎草类占 2 8% ;在次优势种方面 ,杂类草和禾草所占比重都有所增加 .草原成分出现在从中生至旱生的的群丛中 ,在有些群丛中甚至成为次优势种 .沼泽消退、黄河河道附近沙化以及过牧的阳坡山地生长带刺的旱生化植被 ,说明当地正经历着干旱化的过程 ,原因不仅有自然的还有人为的 ,特别是草地的过度使用 .最后对当地草场的管理及发展提出了一些建议 .图 3表 2参 2 | 王乾 包维楷 晏兆莉 KUMPULA Timo COLPAERT Alfred MANDERSCHEID Angela | 2002 | 应用与环境生物学报2002,8,2: | 23 |
| 5 | 利用外部DEM辅助山区SAR立体像对匹配及地形制图显示文摘SAR立体像对的匹配是利用雷达摄影测量技术提取地形高程信息的关键,匹配精度将直接影响结果 DEM的高程精度。针对山区SAR立体像对匹配过程中同名点选取困难的问题,引入外部粗分辨率DEM作为辅助数据,将该DEM高程转换为视差,为匹配提供初值,同时采用金字塔匹配策略,不仅可以缩小搜索范围,提高搜索效率,而且能够减少粗差的产生。试验结果表明,采用外部DEM辅助之后,匹配粗差点数量相对于传统的雷达摄影测量处理结果明显减少,从而有效地提高了高程信息提取重建的精度。 | 贺雪艳 张路 Timo BALZ 廖明生 | 2013 | 测绘学报2013,42,3: | 16 |
| 6 | 压缩感知在城区高分辨率SAR层析成像中的应用显示文摘在建筑密集的城区复杂场景中,高分辨率SAR影像中存在严重的叠掩效应,影像解译的难度加大。SAR层析成像可以分离单个分辨单元内混叠的散射体目标,并且获取各个散射体的3维位置和后向散射强度。该文首先论述了3维SAR层析成像的基本原理,针对传统谱估计法获得的高程向分辨率较低的问题,综述了压缩感知方法在城区3维SAR层析成像中的应用,以基追踪和双步迭代收缩阈值法为例,开展了Terra SAR-X聚束模式数据实验,并与传统的奇异值阈值法进行了对比分析。研究结果表明压缩感知方法的高程向超分辨率、旁瓣抑制优势明显,在城区SAR层析成像中具有广阔的应用前景。 | 廖明生 魏恋欢 汪紫芸 Timo Balz 张路 | 2015 | 雷达学报(中英文)2015,4,2: | 16 |
| 7 | Landslide monitoring with high-resolution SAR data in the Three Gorges region显示文摘Employing the well-known D-InSAR technique,we investigated landslide monitoring in the Three Gorges region using TerraSAR-X data.The experiment demonstrates that using both the amplitude and differential phase allows us to identify the precise location,deformation and time range of occurrence of certain landslides.To overcome the atmospheric effect on D-InSAR results,a time-series analysis was also carried out.The observed nonlinear relationship between the deformation and water level suggests that reservoir water level fluctuation is one of the major causes of landslides,which is significant in terms of issuing landslide warnings.In addition,the comparison of TerraSAR-X and C-band ASAR data results indicates that TerraSAR-X data provide far more reasonable deformation measurements because of their high temporal and spatial resolutions. | MingSheng Liao Jing Tang Teng Wang Timo Balz Lu Zhang | 2012 | Science China Earth Sciences2012,55,4: | 15 |
| 8 | RFID系统防碰撞协议研究--设计与优化显示文摘碰撞问题是影响射频识别(RFID)系统读取效率的关键问题。该文提出了两种新的防碰撞协议——CDCA协议和CDCA-2D协议,并且对两种协议进行了详细的理论分析和优化。新协议将RFID系统的读取过程分为两个阶段,利用第1阶段的碰撞检测信息实现在第2个阶段的无碰撞通信。仿真结果表明,和目前国际上流行的RFID防碰撞算法相比,两种新协议极大地提高了读取的效率。 | 王建伟 赵玉萍 Timo Korhonen | 2009 | 电子与信息学报2009,31,1: | 15 |
| 9 | 利用后向散射特性从高分辨率SAR影像中提取建筑物高度显示文摘研究了一种基于雷达后向散射特性,从单张星载高分辨率SAR影像提取建筑物高度的方法。该方法通过检测建筑物二次散射强度,同时获取目标方位角、入射角等参数以及相关介质特性等信息,根据后向散射几何光学模型估算建筑物高度。实验验证了对于相当一部分典型建筑物都能够获得较为理想的高程估计值,进而证明了该方法提取建筑物高度的可行性和有效性。 | 刘康 Timo Balz 廖明生 | 2012 | 武汉大学学报(信息科学版)2012,37,7: | 11 |
| 10 | 高分辨率SAR层析成像建筑物叠掩散射体提取显示文摘阐述了SAR层析成像的基本原理,提出了基于Butterworth滤波的奇异值分解层析算法。利用柏林市高分辨率TerraSAR-X数据进行实验,提取了SAR像元内散射体的数量、位置及反射量,实现了星载高分辨率SAR真实数据层析成像,高程向估计精度达到米级。 | 魏恋欢 廖明生 BALZ Timo 张路 | 2014 | 武汉大学学报(信息科学版)2014,39,5: | 10 |
| 11 | 一种新的RFID传感网络中多阅读器防碰撞协议显示文摘阅读器碰撞问题(RCP)是影响射频识别(RFID)系统读取效率的关键问题。提出了一种新的解决阅读器碰撞问题的协议——DREAM协议。新协议根据阅读器间的信号干扰情况在多个阅读器中动态产生若干个临时的控制中心作为簇首,合理安排各个阅读器的读取顺序,完全避免了阅读器间的信息碰撞。理论和仿真结果表明DREAM协议相对于现有性能较优的PULSE协议,在极大地提高系统读取效率的同时,大大地节省了阅读器的功率消耗。 | 王建伟 王东 TIMO Korhonen 赵玉萍 | 2008 | 传感技术学报2008,21,8: | 10 |
| 12 | TomoSAR技术在城市形变监测中的应用显示文摘作为永久散射体雷达干涉测量技术的延伸,多基线SAR层析成像技术能够分离单个SAR像素内的多重散射体信号,精确地获取人工地物目标的三维位置和形变信息,突破城市地区形变监测中叠掩效应的制约,实现城市动态形变监测。尤其是新一代高分辨率SAR卫星发射成功后,为城市动态形变监测研究提供了大量高分辨率高精度数据源。本文首先介绍SAR层析技术的理论模型,然后归纳了现有的层析算法和应用领域,最后探讨了该技术发展面临的关键问题并展望了其广阔发展前景。 | 廖明生 魏恋欢 BALZ Timo 张路 | 2013 | 上海国土资源2013,34,4: | 10 |
| 13 | Predicting scenic beauty of forest stands in Catalonia (North-east Spain)显示文摘森林看台,相片和虚拟现实图象的 90 幅图象的相对偏爱被因特网调查为在看台水平估计美景偏爱开发一个量的模型。从 259 个法官的一个总数的问询表获得的相对优先级价值为对用回归方法被分析明智的比较。二个模型基于看台的二个不同的组被开发。两个模型显示一个森林的优先级承受增加与一在灌木丛和树的数字的 augment,并且另外与树的吝啬的直径。在另一方面,优先级与松和小树的大数字是低的。相片代表的看台比虚拟现实图象代表的那些收到更好的优先级价值。当法官(性,国家或职业) 的背景作为另外的预言者被包括进模型时,没有重要改进被完成。 | Elena Blasco Jose Ramon Gonzalez-Olabarria Pedro Rodriguez-Veiga Timo Pukkala Osmo Kolehmainen Marc Palahi | 2009 | Journal of Forestry Research2009,20,1: | 9 |
| 14 | Optimal management of Korean pine plantations in multifunctional forestry显示文摘Korean pine is one of the most important plantation species in northeast China.Besides timber,it produces edible nuts and plantations sequester carbon dioxide from the atmosphere.This study optimized the management of Korean pine plantations for timber production,seed production,carbon sequestration and for the joint production of multiple benefits.As the first step,models were developed for stand dynamics and seed production.These models were used in a simulation–optimization system to find optimal timing and type of thinning treatments and optimal rotation lengths.It was found that three thinnings during the rotation period were optimal.When the amount or profitability of timber production is maximized,suitable rotation lengths are 65–70 years and wood production is 5.5–6.0 m^3 ha^(-1) a^(-1).The optimal thinning regime is thinning from above.In seed production,optimal rotation lengths are over 100 years.When carbon sequestration in living biomass is maximized,stands should not be clear-cut until trees start to die due to senescence.In the joint production of multiple benefits,the optimal rotation length is 86 years if all benefits(wood,economic profits,seed,carbon sequestration) are equally important.In this management schedule,mean annual wood production is 5.5 m^2 ha^(-1) and mean annual seed yield 141 kg ha^(-1).It was concluded that it is better to produce timber and seeds in the same stands rather than assign stands to either timber production or seed production. | Xingji Jin Timo Pukkala Fengri Li Lihu Dong | 2017 | Journal of Forestry Research2017,28,5: | 8 |
| 15 | Particle size distribution in CPFD modeling of gas-solid flows in a CFB riser显示文摘A computational particle fluid dynamics(CPFD) numerical method to model gas-solid flows in a circulating fluidized bed(CFB) riser was used to assess the effects of particle size distribution(PSD) on solids distribution and flow.We investigated a binary PSD and a polydisperse PSD case.Our simulations were compared with measured solids concentrations and velocity profiles from experiments,as well as with a published Eulerian-Eulerian simulation.Overall flow patterns were similar for both simulation cases,as confirmed by experimental measurements.However,our fine-mesh CPFD simulations failed to predict a dense bottom region in the riser,as seen in other numerical studies.Above this bottom region,distributions of particle volume fraction and particle vertical velocity were consistent with our experiments,and the simulated average particle diameter decreased as a power function with riser height.Interactions between particles and walls also were successfully modeled,with accurate predictions for the lateral profiles of particle vertical velocity.It was easy to implement PSD into the CPFD numerical model,and it required fewer computational resources compared with other models,especially when particles with a polydisperse PSD were present in the heterogeneous flow. | Qinggong Wang Timo Niemi Juho Peltola Sirpa Kallio Hairui Yang Junfu Lu Lubin Weic | 2015 | Particuology2015,13,4: | 8 |
| 16 | Advantages of white LED lamps and new detector technology in photometry显示文摘Light emitting diode(LED)lighting is becoming more and more popular,as incandescent lamps are being phased out globally.LEDs have several advantages over incandescent lamps,including energy efficiency,robustness,long lifetime,and good temporal stability.The three latter features make LEDs attractive candidates as new photometric standards.Because the spectra of white LEDs are limited to the visible wavelength range,a novel method for the realization of photometric units based on the predictable quantum efficient detector(PQED)can be utilized.The method eliminates the need of photometric filters that are traditionally used in photometry,and instead relies on carrying out the photometric weighting numerically based on the measured relative spectrum of the source.The PQED-based realization simplifies the traceability chain of photometric measurements significantly as compared with the traditional filter-based method.The measured illuminance values of a white LED deviate by only 0.03%when determined by the new and the traditional methods.The new PQED method has significantly lower expanded uncertainty of 0.26%(k=52)as compared with that of the traditional filter-based method of 0.42%(k=52).Furthermore,when filtered photometers that measure LED lighting are calibrated using LED lamps as calibration sources instead of incandescent lamps,a significant decrease in the uncertainty related to the spectral mismatch correction can be obtained.The maximum spectral mismatch errors of LED measurements decreased on average by a factor of 3 when switching from an incandescent lamp to an LED calibration source. | Tomi Pulli Timo Donsberg Tuomas Poikonen Farshid Manoocheri Petri Karha Erkki Ikonen | 2015 | Light(Science & Applications)2015,4,1: | 8 |
| 17 | Impact of preoperative chemoradiotherapy on survival in patients with resectable pancreatic cancer显示文摘AIM:To explore whether preoperative chemoradiation therapy improves survival of patients with pancreatic cancer undergoing resectional surgery. METHODS:Forty-seven patients with a malignant pancreatic tumor localized in the head or uncinate process of the pancreas underwent radical pancreaticoduodenectomy. Twenty-two received chemoradiation therapy (gemcitabine and radiation dose 50.4 Gy) before surgery (CRR) and 25 patients underwent surgery only (RO). The study was non-randomised. Patients were identified from a prospective database. RESULTS:The median survival time was 30.2 mo in the CRR group and 35.9 mo in the RO group. No statistically significant differences were found in subclasses according to lymph node involvement,TNM stages,tumor size,or perineural invasion. The one,three and five year survival rates were 81%,33% and 33%,respectively,in the CRR group and 72%,47% and 23%,respectively,in the RO group. In ductal adenocarcinoma,the median survival time was 27 mo in the CRR group and 20 mo in the RO group. No statistically significant differences were found in the above subclasses. The one,three and five year survival rates were 79%,21% and 21%,respectively,in the CRR group and 64%,50% and 14%,respectively,in the RO group. The overall hospital mortality rate was 2%. The morbidity rate was 45% in the CRR group and 32% (NS) in the RO group. CONCLUSION:Major multicenter randomized studies are needed to conclusively assess the impact of neoadjuvant treatment in the management of pancreatic cancer. | Plvi Vento Harri Mustonen Timo Joensuu Pivi Krkkinen Eero Kivilaakso Tuula Kiviluoto | 2007 | World Journal of Gastroenterology2007,13,21: | 8 |
| 18 | Extreme Cold Events from East Asia to North America in Winter 2020/21:Comparisons,Causes,and Future Implications显示文摘Three striking and impactful extreme cold weather events successively occurred across East Asia and North America during the mid-winter of 2020/21.These events open a new window to detect possible underlying physical processes.The analysis here indicates that the occurrences of the three events resulted from integrated effects of a concurrence of anomalous thermal conditions in three oceans and interactive Arctic-lower latitude atmospheric circulation processes,which were linked and influenced by one major sudden stratospheric warming(SSW).The North Atlantic warm blob initiated an increased poleward transient eddy heat flux,reducing the Barents-Kara seas sea ice over a warmed ocean and disrupting the stratospheric polar vortex(SPV)to induce the major SSW.The Rossby wave trains excited by the North Atlantic warm blob and the tropical Pacific La Nina interacted with the Arctic tropospheric circulation anomalies or the tropospheric polar vortex to provide dynamic settings,steering cold polar air outbreaks.The long memory of the retreated sea ice with the underlying warm ocean and the amplified tropospheric blocking highs from the midlatitudes to the Arctic intermittently fueled the increased transient eddy heat flux to sustain the SSW over a long time period.The displaced or split SPV centers associated with the SSW played crucial roles in substantially intensifying the tropospheric circulation anomalies and moving the jet stream to the far south to cause cold air outbreaks to a rarely observed extreme state.The results have significant implications for increasing prediction skill and improving policy decision making to enhance resilience in“One Health,One Future”. | Xiangdong ZHANG Yunfei FU Zhe HAN James E.OVERLAND Annette RINKE Han TANG Timo VIHMA Muyin WANG | 2022 | Advances in Atmospheric Sciences2022,39,4: | 7 |
| 19 | 基于温度链浮标获取南极普里兹湾积雪和固定冰厚度的研究显示文摘极地积雪和海冰厚度是气候变化的重要指标,也是船舶在冰区航行需要掌握的主要参数。2014和2015年在南极普里兹湾中山站附近布放了一种新式的温度链浮标,该浮标每天进行4次常规温度观测和1次加热升温观测,用于实时获取积雪和海冰剖面温度及厚度数据的研究。通过分析剖面温度曲线和升温曲线反映出的大气、积雪、海冰和海水4种介质的热传导特性差异,可利用人工识别的方法(人工经验法)获得大气/积雪、积雪/海冰和海冰/海水界面的位置。根据统计不同介质在升温响应和垂直温度梯度等方面的特性,找到合理阈值,可通过编写程序自动判断各界面的位置(自动程序法)。本文利用这两种方法来判断不同物质界面位置从而计算得到积雪和海冰厚度。与现场人工观测的海冰厚度相比,人工经验法的平均偏差和均方根偏差分别为2.1cm和6.4cm(2014年)以及4.3cm和6.5cm(2015年),自动程序法的平均偏差和均方根偏差分别为-6.8cm和6.4cm(2014年)以及4.5cm和6.6cm(2015年);对于积雪,人工经验法与现场人工观测的平均偏差和均方根偏差分别为0.5cm和8.5cm,而自动程序法的平均偏差和均方根偏差分别为4.7cm和10.8cm。自动程序法误差较人工经验法偏大,但考虑到整体冰厚和现场观测的误差,两种方法的结果均是可信的,精度是可以接受的。利用新式的温度链浮标实时获取南极普里兹湾积雪和海冰厚度是可行的。 | 赵杰臣 杨清华 程斌 汪宁 惠凤鸣 沈辉 韩晓鹏 张林 Timo Vihma | 2017 | 海洋学报2017,39,11: | 7 |
| 20 | Overexpression of HSP27 and HSP70 is associated with decreased survival among patients with esophageal adenocarcinoma显示文摘BACKGROUND Overexpression of heat shock proteins(HSPs) is associated with several malignancies and contributes to the development, progression, and metastasis of cancer, in addition to the inhibition of cellular death. In recent years, there has been active research into using HSP inhibitors in several malignancies. Due to the poor prognosis of esophageal adenocarcinoma(EAC), it would be valuable to find new biomarkers for the development of cancer treatments.AIM To evaluate the expressions of HSP27 and HSP70 and their effect on survival in EAC.METHODS Immunohistochemical analyses and evaluations of HSP27 and HSP70 expression were performed on all available samples from 93 patients diagnosed with EACbetween 1990 and 2007 at two university hospitals. Fifteen cases with Barrett's metaplasia and 5 control cases from the same patient population were included in the analysis. HSP expression was quantitatively assessed and classified as high or low. Kaplan-Meier analyses and Cox regression models adjusting for age and sex as well as tumor site, stage, and grade were used to evaluate the effect on survival.RESULTS Tumor stage and surgical treatment were the main prognostic factors. High HSP27 expression in cancer cases was a strong negative predictive factor, with a mean survival of 23 mo compared to the 49 mo in cases with a low expression(P= 0.018). The results were similar for HSP70, with a poorer survival of 17 mo in cases with high HSP70 expression, in contrast to 40 mo(P = 0.006) in cases with a low expression. A Cox regression survival analysis was performed, adjusting for possible confounding factors, and higher HSP27 and HSP70 expressions remained an independent negative prognostic factor. The HSPs' correlation with survival was not affected by cancer treatments. When the analysis was adjusted for all factors, the odds ratios for HSP27 and HSP70 were 3.3(CI: 1.6–6.6, P =0.001) and 2.2(CI: 1.2–3.9, P = 0.02), respectively.CONCLUSION HSP27 and HSP70 overexpression is associated with poor survival in EAC, which is, to the best of our knowledge, reported for the first time. | Henna K S?derstr?m Juha T Kauppi Niku Oksala Timo Paavonen Leena Krogerus Jari R?s?nen Tuomo Rantanen | 2019 | World Journal of Clinical Cases2019,7,3: | 7 |