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373篇 您的检索式:作者名="Da Lin"
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1Hardy spaces H^p over non-homogeneous metric measure spaces and their applications显示文摘Let(X,d,)be a metric measure space satisfying both the geometrically doubling and the upper doubling conditions.Let ρ∈(1,∞),0FU Xing LIN Hai Bo YANG Da Chun YANG Dong Yong 2015Science China Mathematics2015,58,2:32
2Morphological study on colonic pathology in ulcerative colitis treated by moxibustion显示文摘AIM To observe the therapeutic effect ofmoxibustion on ulcerative colitis and itsinfluence on the colonic mucosal morphology.METHODS Forty-six patients with ulcerativecolitis were randomly divided into themoxibustion with herbal medicine underneathgroup and the western medicine group.Thirtypatients were treated with the abovemoxibustion and 16 patients with Salicylayefapyridine(SASP).The colonic mucosa of 13patients in the moxibustion group was observedby colonoscopy before and after the treatment.Mucin was also analyzed by H.E and AB-PASstaining.RESULTS Seventeen patients were clinicallycured,12 were improved and 1 unchanged in themoxibustion group.In the control group,5patients were clinically cured,7 improved and 4unchanged.Thirteen patients with active UCwere taken as the subjects for histopathologicanalysis in this study.The colonic mucosallesions were remarkably improved and thecharacteristic of the mucin also changed.Inmost sections,the chronic inflammation ofmucosa was geatly ameliorated(P<0.01).Theinflammatory cell infiltratation much decreased and neutrophils,disapeared in most sections(P<0.001).The goblet cells significantlyincreased(P<0.001);crypt paracrypt abscessor mucosal ulceration was seen(P<0.001).CONCLUSION The rate of cure of ulcerative colitis by moxibustion with herbal medicine beneath is superior to that by SASP. This sort of moxibustion can effectively improve the colonic mucosal lesions and restore the proportion of mucoprotein to near normal.Huan Gan Wu Li Bin Zhou Da Ren Shi Shi Min Liu Hui Rong Liu Bi Meng Zhang Han Ping Chen Lin Shan Zhang 2000World Journal of Gastroenterology2000,6,6:28
3Clinical and radiographic results of cervical artificial disc arthroplasty: over three years follow-up cohort study显示文摘颈的圆盘关节造形术的背景理论上的优点在邻近片断的退化的颈的脊骨,和减小包括正常运动和 biomechanics 的保藏。在短术语的颈的圆盘关节造形术的临床、 X 光线照相术的效果被查明了。这研究的目的是在这未来的队研究研究中间的 results.Methods 的数据,从 2003 年 12 月经历了颈的磁盘关节造形术到 2006 年 1 月的 50 个病人被注册。有 39 个病人,收到了 1 水平圆盘关节造形术,并且 11 个病人收到了 2 水平圆盘关节造形术,与 50.9 年(从 29 ~ 73 的范围) 的平均年龄。中部的后续是 41.85months (从 36.00-55.63 月的范围) 。病人们关于他们日本整形外科的协会(JOA ) 分数的中部的价值是的症状,神经症状,和 X 光线照相术的 results.Results 有希望地被跟随 14.0 在外科前,并且 16.5 在最近的后续(P 0.01 ) 。JOA 分数的恢复率的中部的价值是 92.2% 。在索引的水平的运动(ROM ) 的外科手术前的范围是(10.40 吗??TIAN Wei HAN Xiao LIU Bo LI Qin HU Lin LI Zhi-yu YUAN Qiang HE Da XING Yong-gang 2010Chinese Medical Journal2010,,21:19
4Efficient Gene Targeting in Zebrafish Mediated by a Zebrafish-Codon-Optimized Cas9 and Evaluation of Off-Targeting Effect显示文摘Targeted genome modifications with the Cas9/gRNA system derived from the clustered regularly interspaced short palindromic repeat/CRISPR-associated(CRISPR/Cas)system have been successfully used in cultured human cells as well as in most model organisms,including zebrafish(Danio rerio),mouse,and fruit fly(Chang et al.,2013;Cong et al.,2013;Da Liu Zhanxiang Wang An Xiao Yutian Zhang Wenyuan Li Yao Zu Shaohua Yao Shuo Lin Bo Zhang 2014Journal of Genetics and Genomics2014,41,1:18
5Salt-responsive genes in rice revealed by cDNA microarray analysis显示文摘We used cDNA microarrays containing ~9,000 unigenes to identify 486 salt responsive expressed sequence tags (ESTs) (representing ~450 unigenes) in shoots of the highly salt-tolerant rice variety, Nona Bokra (Oryza sativa L. Ssp.Indica pv. Nona). Some of the genes identified in this study had previously been associated with salt stress. Howeverthe majority were novel, indicating that there is a great number of genes that are induced by salt exposure. Analysis of the salt stress expression profile data of Nona provided clues regarding some putative cellular and molecular processes that are undertaken by this tolerant rice variety in response to salt stress. Namely, we found that multiple transcription factors were induced during the initial salt response of shoots. Many genes whose encoded proteins are implicated in detoxification, protectant and transport were rapidly induced. Genes supporting photosynthesis were repressed and those supporting carbohydrate metabolism were altered. Commonality among the genes induced by salt exposure with those induced during senescence and biotic stress responses suggests that there are shared signaling pathways among these processes. We further compared the transcriptome changes of the salt-sensitive cultivar, IR28, with that of Nona rice. Many genes that are salt responsive in Nona were found to be differentially regulated in IR28. This study identified a large number of candidate functional genes that appear to be involved in salt tolerance and further examination of these genes may enable the molecular basis of salt tolerance to be elucidated.Dai Yin CHAO Yong Hai LUO Min SHI Da LUO Hong Xuan LIN 2005Cell Research2005,15,10:17
6Geochemical features and genesis of the natural gas and bitumen in paleo-oil reservoirs of Nanpanjiang Basin, China显示文摘Bitumen from the Nanpanjiang Basin occurs mainly in the Middle Devonian and Upper Permian reef limestone paleo-oil reservoirs and reserves primarily in holes and fractures and secondarily in minor matrix pores and bio-cavities. N2 is the main component of the natural gas and is often associated with pyrobitumen in paleo-oil reservoirs. The present study shows that the bitumen in paleo-oil reservoirs was sourced from the Middle Devonian argillaceous source rock and belongs to pyrobitumen by crude oil cracking under high temperature and pressure. But the natural gas with high content of N2 is neither an oil-cracked gas nor a coal-formed gas generated from the Upper Permian Longtan Formation source rock, instead it is a kerogen-cracked gas generated at the late stage from the Middle Devonian argilla- ceous source rock. The crude oil in paleo-oil reservoirs completely cracked into pyrobitumen and methane gas by the agency of hugely thick Triassic deposits. After that, the abnormal high pressure of methane gas reservoirs was completely destroyed due to the erosion of 2000--4500-m-thick Triassic strata. But the kerogen-cracked gas with normal pressure was preserved under the relatively sealed condition and became the main body of the gas shows.ZHAO MengJun ZHANG ShuiChang ZHAO Lin DA Jiang 2007Science China Earth Sciences2007,50,5:11
7In situ optical backpropagation training of diffractive optical neural networks显示文摘Training an artificial neural network with backpropagation algorithms to perform advanced machine learning tasks requires an extensive computational process.This paper proposes to implement the backpropagation algorithm optically for in situ training of both linear and nonlinear diffractive optical neural networlks,which enables the acceleration of training speed and improvement in energy efficiency on core computing modules.We demonstrate that the gradient of a loss function with respect to the weights of diffractive layers can be accurately calculated by measuring the forward and backward propagated optical fields based on light reciprocity and phase conjunction principles.The diffractive modulation weights are updated by programming a high-speed spatial light modulator to minimize the error between prediction and target output and perform inference tasks at the speed of light.We numerically validate the effectiveness of our approach on simulated networks for various applications.The proposed in situ optical learning architecture achieves accuracy comparable to in silico training with an electronic computer on the tasks of object dlassification and matrix-vector multiplication,which further allows the diffractive optical neural network to adapt to system imperfections.Also,the self-adaptive property of our approach facilitates the novel application of the network for all-optical imaging through scattering media.The proposed approach paves the way for robust implementation of large-scale difractive neural networks to perform distinctive tasks all-optically.TIANKUANG ZHOU LU FANG TAO YAN JIAMIN WU YIPENG LI JINGTAO FAN HUAQIANG WU XING LIN QIONGHAI DA 2020Photonics Research2020,8,6:11
8A 12-year cohort study on the efficacy of plasmaderived hepatitis B vaccine in rural newborns显示文摘AIM To understand the anti-HBs persistenceand the long-term preventive efficacy in ruralnewborns after vaccination with plasma-derivedhepatitis B vaccine.METHODS In the time of expanded program onimmunization(EPI),the newborns werevaccinated with 10μg×3 doses of hepatitis Bvaccine and 762 newborns who were HBsAgnegative after primary immunization wereselected for cohort observation from 1986 to1998.Their serum samples were detectedqualitatively and quantitatively for hepatitis Binfecting markers,including HBsAg,anti-HBsand anti-HBc by SPRIA Kits.The annual HBsAgpositive conversion rate was counted by life-table method.RESULTS①The anti-HBs positive rate was94.44% for the babies born to HBsAg negativemothers and 84.21% for those born to HBsAgpositive mothers in the 1st year afterimmunization,and dropped to 51.31% and52.50% in the 12th year respectively.GMT valuewas dropped from 31.62 to 3.13 and 23.99 to 3.65in the 2nd to the 12th year respectively.Therewas a marked drop in GMT at the 3rd to the 5thyear,and in anti-HBs positive rate at the 9th tothe 10th year.②In the period of 12 yearsobservation,the person-year HBsAg positive conversion rates were 0.12%(5/4150.0)innewborns born to HBsAg negative mothers and0.20%(1/508.0)in those born to HBsAgpositive mothers,and none of the HBsAgpositive converted children became HBsAgchronic carriers.Compared with the baselinebefore immunization,the protective rates were97.19% and 95.32% respectively.CONCLUSION The protective efficacy ofplasma-derived hepatitis B vaccine persisted atleast 12 years,and a booster dose seems notnecessary within at least 12 years after theprimary three-doses immunization to newbornsborn to HBsAg negative mothers.Hong Bin Liu Zong Da Meng Jing Chen Ma Chang Quan Han Ying Lin Zhang Zhan Chun Xing Yu Wei Zhang Yu Zhong Liu Hui Lin Cao 2000World Journal of Gastroenterology2000,6,3:11
9Can ultrasound predict the severity of acute pancreatitis early by observing acute fluid collection?显示文摘INTRODUCTIONThe spectrum of acute pancreatitis (AP) ranges from a mild spontaneously resolved disorder to severe disease with mortality up to 20%-48.4%[1-3]. sAP is defined as the AP with organ failure and /or local complications which developed form acute fluid collection (AFC) including necrosis ,abscess , pseudocyst formation into or around the pancreas [4].Yan Luo1 Chao Xin Yuan1 Yu Lan Peng1 Pei Lin Wei1 Zhao Da Zhang2 Jun Ming Jiang3 Lin Dai1 Yun Kai Hu1 1Ultrasound Department of First Affiliated Hospital of West China University of Medical Science, Chengdu 610041, Sichuan Province, China2Surgery Department of First Affiliated Hospital of West China University of Medical Science, Chengdu 610041, Sichuan Province, China3Tranditional Chinese Medicine, Department of First Affiliated Hospital of West China University of Medical Science, Chengdu 610041, Sichuan Province, China 2001World Journal of Gastroenterology2001,7,2:8
10Effects of yaw-roll coupling ratio on the lateral-directional departure prediction and restraint显示文摘The experimental data obtained from yaw-roll coupled wind tunnel tests are used for lateral-directional departure prediction,by linearizing the_b model to extract nominal dynamic derivatives at each coupling ratio.The prediction results are compared with those of the existing engineering methods which are based on the conventional aerodynamic derivatives.The comparison shows that the yaw-roll coupling ratio has a great influence on the departure susceptibility.The departure resistance will loss in partial region of the coupling ratio when the angle of attack is higher than a critical value.According to the stable and unstable regions of coupling ratio,a two-segment stability augmentation system with two different feedback gain matrices is obtained by pole-placement method.The two-segment stability augmentation system is used in the simulations of straight and level flight,steady turn,spin recovery and Herbst maneuver.The simulation results are also compared with the applications of a fixed-gain stability augmentation system designed by the conventional aerodynamic derivatives.When the yaw-roll coupling effects are fully considered,the two-segment stability augmentation system is more effective for departure restraint and can provide a better flying quality with less control energy.Lin SHEN Da HUANG Genxing WU 2019Chinese Journal of Aeronautics2019,32,10:8
11Exome sequencing identifies compound heterozygous PKHD1 mutations as a cause of autosomal recessive polycystic kidney disease显示文摘ZHANG Da LU Lin YANG Hong-bo LI Mei SUN Hao ZENG Zheng-pei LI Xin-ping XIA Wei-bo XING Xiao-ping 2012Chinese Medical Journal2012,,14:7
12An Audio Zero-Watermark Scheme Based on Energy Comparing显示文摘Zero-watermark technique,embedding watermark without modifying carriers,has been broadly applied for copyright protection of images.However,there is little research on audio zerowatermark.This paper proposes an audio zero-watermark scheme based on energy relationship between adjacent audio sections.Taking use of discrete wavelet transformation(DWT),it gets power approximations,or energies,of audio segments.Then,it extracts the audio profile,i.e.the zero-watermark,according to the relative size of energies of consecutive fragments.The experimental results demonstrate that the proposed scheme is robust against general malicious attacks including noise addition,resampling,low-pass filtering,etc.,and this approach effectively solves the contradiction between inaudibility and robustness.YANG Yu LEI Min CHENG Mingzhi LIU Bohuai LIN Guoyuan XIAO Da 2014China Communications2014,11,7:7
13Effects of yaw-roll coupling ratio on lateraldirectional aerodynamic characteristics显示文摘Experimental investigation of large amplitude yaw-roll coupled oscillations was conducted in a low-speed wind tunnel using an aircraft configuration model. A special test rig was designed and constructed to provide different coupled motions from low to high angles of attack.A parameter ‘‘coupling ratio' was introduced to indicate the extent of yaw-roll coupling. At each pitch angle, seven coupling ratios were designed to study the yaw-roll coupling effects on the lateraldirectional aerodynamic characteristics systematically. At high angles of attack, the damping characteristics of yawing and rolling moments drastically varied with coupling ratios. In the coupled motions with the rotation taking place about the wind axis, the lateral-directional aerodynamic moments exhibited unsteady characteristics and were different from the ‘‘quasi-steady' results of the rotary balance tests. The calculated results of the traditional aerodynamic derivative method were also compared with the experimental data. At low and very high angles of attack, the aerodynamic derivative method was applicative. However, within a wide range of angles of attack, the calculated results of aerodynamic derivative method were inconsistent with the experimental data, due to the drastic changes of damping characteristics of lateral-directional aerodynamic moments with yaw-roll coupling ratios.Lin SHEN Da HUANG Genxing WU 2019Chinese Journal of Aeronautics2019,32,2:7
14Trend and Interannual Variability of Chinese Air Pollution since 2000 in Association with Socioeconomic Development: A Brief Overview显示文摘Chinese air pollution has increased in this century along with the rapid socioeconomic development and resulting anthropogenic emissions. While recent emission control measures have shown encouraging results and have reduced the levels of sulfur dioxide and primary aerosols, the concentrations of other air pollutants continue to grow, particularly secondary pollutants including ozone and secondary aerosols. Meanwhile, a variety of intentional and unintentional socioeconomic events have temporarily changed the pace, and even the signs, of growth of air pollution. These events include the short-term emission restrictions imposed during the Sino-African Summit, the Beijing Olympics and Paralympics, the Shanghai World Exposition (Shanghai Expo), the Guangzhou Asian Olympics, and the Shenzhen Universiade, as well as the unintentional emission reductions associated with the recent economic recession and the annual Chinese New Year. This paper presents a brief overview of trends and temporary perturbations of Chinese air pollution since 2000, summarizing studies on anthropogenic emission inventories, atmospheric measurements, and inverse modeling. It concludes with recommendations for future research.LIN Jin-Tai PAN Da ZHANG Rui-Xiong 2013Atmospheric and Oceanic Science Letters2013,6,2:7
15Ambient noise spectral properties in the north area of Xisha显示文摘Ambient noise is very important in the prediction system of a sonar performance, because it determines the detection ranges always in a passive sonar and usually in an active sonar. In the uncertainty issue for the sonar performance, it is necessary to know this factor's statistical characteristics that are only obtained by data processing from the underwater ambient noise measurements. Broad-band ambient noise signals from 16 hydrophones were amplified and recorded for 2 min every 1 h. The results show that the ambient noise is essentially depth independent. The cross correlation of the ambient noise levels(1, 6 and 12 h average) with a wind speed is presented. It was found that the correlation is excellent on the upper frequency band and the noise levels correlate better with high wind speed than with low wind speed.DA Lianglong WANG Chao HAN Mei ZHANG Lin 2014Acta Oceanologica Sinica2014,33,12:6
16Multiple Components are Integrated to Determine Leaf Complexity in Lotus japonicus显示文摘Transcription factors and phytohormones have been reported to play crucial roles to regulate leaf complexity among plant species. Using the compound-leafed species Lotus japonicus, a model legume plant with five visible leaflets, we characterized four independent mutants with reduced leaf complexity, proliferating floral meristem (pfm), proliferating floral organ-2 (pfo-2), fused leaflets1 (ful1) and umbrella leaflets (uml), which were further identified as loss-of-function mutants of Arabidopsis orthologs LEAFY (LFY ), UNUSUAL FLORAL ORGANS (UFO), CUP-SHAPED COTYLEDON 2 (CUC2) and PIN-FORMED 1 (PIN1), respectively. Comparing the leaf development of wild-type and mutants by a scanning electron microscopy approach, leaflet initiation and/or dissection were found to be affected in these mutants. Expression and phenotype analysis indicated that PFM/LjLFY and PFO/LjUFO determined the basipetal leaflet initiation manner in L. japonicus. Genetic analysis of ful1 and uml mutants and their double mutants revealed that the CUC2-like gene and auxin pathway also participated in leaflet dissection in L. japonicus, and their functions might influence cytokinin biogenesis directly or indirectly. Our results here suggest that multiple genes were interplayed and played conserved functions in controlling leaf complexity during compound leaf development in L. japonicus.Zhenhua Wang Jianghua Chen Lin Weng Xin Li Xianglin Cao Xiaohe Hu Da Luo Jun Yang 2013Journal of Integrative Plant Biology2013,55,5:6
17Advances in lithium niobate photonics:development status and perspectives显示文摘Lithium niobate(LN)has experienced significant developments during past decades due to its versatile properties,especially its large electro-optic(EO)coefficient.For example,bulk LN-based modulators with high speeds and a superior linearity are widely used in typical fiber-optic communication systems.However,with everincreasing demands for signal transmission capacity,the high power and large size of bulk LN-based devices pose great challenges,especially when one of its counterparts,integrated silicon photonics,has experienced dramatic developments in recent decades.Not long ago,high-quality thin-film LN on insulator(LNOI)became commercially available,which has paved the way for integrated LN photonics and opened a hot research area of LN photonics devices.LNOI allows a large refractive index contrast,thus light can be confined within a more compact structure.Together with other properties of LN,such as nonlinear/acousto-optic/pyroelectric effects,various kinds of high-performance integrated LN devices can be demonstrated.A comprehensive summary of advances in LN photonics is provided.As LN photonics has experienced several decades of development,our review includes some of the typical bulk LN devices as well as recently developed thin film LN devices.In this way,readers may be inspired by a complete picture of the evolution of this technology.We first introduce the basic material properties of LN and several key processing technologies for fabricating photonics devices.After that,various kinds of functional devices based on different effects are summarized.Finally,we give a short summary and perspective of LN photonics.We hope this review can give readers more insight into recent advances in LN photonics and contribute to the further development of LN related research.Guanyu Chen Nanxi Li Jun Da Ng Hong-Lin Lin Yanyan Zhou Yuan Hsing Fu Lennon Yao Ting Lee Yu Yu Ai-Qun Liu Aaron J.Danner 2022Advanced Photonics2022,4,3:6
18Impacts of Land Cover Changes on Ecosystem Carbon Stocks Over the Transboundary Tumen River Basin in Northeast Asia显示文摘Understanding the effects of land cover changes on ecosystem carbon stocks is essential for ecosystem management and environmental protection, particularly in the transboundary region that has undergone marked changes. This study aimed to examine the impacts of land cover changes on ecosystem carbon stocks in the transboundary Tumen River Basin(TTRB). We extracted the spatial information from Landsat Thematic Imager(TM) and Operational Land Imager(OLI) images for the years 1990 and 2015 and obtained convincing estimates of terrestrial biomass and soil carbon stocks with the InVEST model. The results showed that forestland, cropland and built-up land increased by 57.5, 429.7 and 128.9 km2, respectively, while grassland, wetland and barren land declined by 24.9, 548.0 and 43.0 km2, respectively in the TTRB from 1990 to 2015. The total carbon stocks encompassing aboveground, belowground, soil and litter layer carbon storage pools have declined from 831.48 Tg C in 1990 to 831.42 Tg C in 2015 due to land cover changes. In detail, the carbon stocks decreased by 3.13 Tg C and 0.44 Tg C in Democratic People's Republic of Korea(North Korea) and Russia, respectively, while increased by 3.51 Tg C in China. Furthermore, economic development, and national policy accounted for most land cover changes in the TTRB. Our results imply that effective wetland and forestland protection policies among China, North Korea, and Russia are much needed for protecting the natural resources, promoting local ecosystem services and regional sustainable development in the transnational area.XIANG Hengxing JIA Mingming WANG Zongming LI Lin MAO Dehua ZHANG Da CUI Guishan ZHU Weihong 2018Chinese Geographical Science2018,28,6:6
19A new metabonomics method for simultaneous determination of EFAs and NEFAs in plasma using GC-MS and its application显示文摘A new metabonomics method was developed for simultaneous qualitative and quantitative analysis on esterified and nonesterified fatty acids(EFAs and NEFAs) in plasma.Merely 10μL of plasma was required.The pretreatment of the sample was simple without disposing the protein.After simple extraction and derivation,15 FAs in plasma were precisely quantified.Gas chromatography tandem mass spectrometry(GC-MS) was used in the study and the quantities of the analytes,which varied in abundance over three orders of magnitude.The established method showed good accuracy.The curve correlation coefficients were all above 0.997.The RSDs of precision for all compounds were below 15%and recoveries were all between 80 and 110%.PLS-DA modal was used in the data management.Li Da Han Qiong Lin Liang Yi Ming Wang Ping Hu Guo An Luo 2009Chinese Chemical Letters2009,20,9:5
20LATHYROIDES, Encoding a WUSCHEL-Related Homeoboxl Transcription Factor, Controls Organ Lateral Growth, and Regulates Tendril and Dorsal Petal Identities in Garden Pea (Pisum sativum L.)显示文摘在器官开发期间,许多关键管理者在植物染色体被识别了,它在植物种类之中起一个保存作用控制器官身份或决定器官尺寸和形状。这些关键管理者是否能获得多样的功能并且集成于在不同种类之中的不同分子的小径,是吸引人的,产生在自然的机关形式的巨大的差异。在这研究,我们描绘了并且克隆 LATHYROIDES (板条) ,在豌豆的一个古典地点,其变化在卷须和背面的花瓣开发上显示机关和占优势的效果的侧面的生长的多种的改变。板条编码 WUSCHEL 相关的 homeobox1 (WOX1 ) 抄写因素,它在决定器官有保存功能在不同植物种类之中的侧面的生长。而且,我们证明那板条调整了卷须更少(TL ) 的表示水平,在在复合的叶的卷须开发的控制的一个关键因素,和板条遗传上与 LOBED 标准(LST ) 交往了,一个花的背面的因素,影响背面的花瓣身份。因此,板条在豌豆在机关开发期间起多重作用:控制机关维持一个保存函数侧面的长出,并且在复合的叶调制机关身份并且两侧对称花开发分别地。我们的数据显示一个关键管理者能在机关开发的不同方面起重要作用并且在机关开发的控制奉献给分子的机制的复杂性以便在不同种类创造不同机关形式。Li-Li Zhuang Mike Ambrose Catherine Rameau Lin Weng Jun Yang Xiao-He Hu Da Luo Xin Li 2012Molecular Plant2012,5,6:5
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