|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | 甘肃大地湾遗址距今6万年来的考古记录与旱作农业起源显示文摘报道了中国北方早期旱作农业起源地之一的甘肃秦安大地湾遗址Dadiwan06探方的最新发掘成果,根据黄土-古土壤序列、绝对测年(AMS 14C和光释光测年)、气候事件年龄和考古分析,为Dadiwan06探方的地层沉积建立了6.5万年的年代框架.考古材料分析显示,Dadiwan06探方完整记录了石英打制技术制品、细石器技术制品、大地湾一期文化以及仰韶文化陶器制品等分别代表中国北方原始采集狩猎经济、先进采集狩猎经济、早期栽培经济与成熟农业经济的4个不同发展阶段,反映了大地湾遗址距今6.0万年以来由采集狩猎经济逐步向农业经济过渡的持续人类活动历史。 | 张东菊 陈发度 BETTINGER R L BARTON L 吉笃学 MORGAN C 王辉 程晓钟 董广辉 GUILDERSON T P 赵晖 | 2010 | 科学通报2010，55，10： | 42 |
| 2 | Shear strength criteria for rock,rock joints,rockfill and rock masses:Problems and some solutions显示文摘Although many intact rock types can be very strong,a critical confining pressure can eventually be reached in triaxial testing,such that the Mohr shear strength envelope becomes horizontal.This critical state has recently been better defined,and correct curvature or correct deviation from linear Mohr-Coulomb(MC) has finally been found.Standard shear testing procedures for rock joints,using multiple testing of the same sample,in case of insufficient samples,can be shown to exaggerate apparent cohesion.Even rough joints do not have any cohesion,but instead have very high friction angles at low stress,due to strong dilation.Rock masses,implying problems of large-scale interaction with engineering structures,may have both cohesive and frictional strength components.However,it is not correct to add these,following linear M-C or nonlinear Hoek-Brown(H-B) standard routines.Cohesion is broken at small strain,while friction is mobilized at larger strain and remains to the end of the shear deformation.The criterion 'c then σn tan φ' should replace 'c plus σn tan φ' for improved fit to reality.Transformation of principal stresses to a shear plane seems to ignore mobilized dilation,and caused great experimental difficulties until understood.There seems to be plenty of room for continued research,so that errors of judgement of the last 50 years can be corrected. | Nick Barton | 2013 | Journal of Rock Mechanics and Geotechnical Engineering2013，5，4： | 41 |
| 3 | Effect of Cartilage Endplate on Cell Based Disc Regeneration: A Finite Element Analysis显示文摘This study examines the effects of cartilage endplate(CEP)calcification and the injection of intervertebral disc(IVD)cells on the nutrition distributions inside the human IVD under physiological loading conditions using multiphasic finite element modeling.The human disc was modeled as an inhomogeneous mixture consisting of a charged elastic solid,water,ions(Na+and Cl��),and nutrient solute(oxygen,glucose and lactate)phases.The effect of the endplate calcification was simulated by a reduction of the tissue porosity(i.e.,water volume faction)from 0.60 to 0.48.The effect of cell injection was simulated by increasing the cell density in the nucleus pulposus(NP)region by 50%,100%,and 150%.Strain-dependent transport properties(e.g.,hydraulic permeability and solute diffusivities)were considered to couple the solute transport and the mechanical loading.The simulation results showed that nutrient solute distribution inside the disc is maintained at a stable state during the day and night.The physiological diurnal cyclic loading does not change the nutrient environment in the human IVD.The cartilage endplate plays a significant role in the nutrient supply to human IVD.Calcification of the cartilage endplate significantly reduces the nutrient levels in human IVD.Therefore,in cell based therapy for IVD regeneration,the increased nutrient demand as a result of cell injection needs to be addressed.Excessive numbers of injected cells may cause further deterioration of the nutrient environment in the degenerated disc.This study is important for understanding the pathology of IVD degeneration and providing new insights into cell based therapies for low back pain. | YongrenWu Sarah Cisewski Barton L.Sachs Hai Yao | 2013 | Molecular & Cellular Biomechanics2013，10，2： | 14 |
| 4 | 环北太平洋地区现代植被中C3/C4植物相对丰度与气候条件关系研究显示文摘按照一个统一的方法,即以?24‰和?14‰作为纯C3和纯C4植被下表土总有机质碳同位素组成(δ13CTOC)的端元值,利用来自环北太平洋地区的中国东部、澳大利亚以及北美大平原地区的表土δ13CTOC数据,估算了这3个区域现代植被中C3和C4植物的相对生物量贡献比例,并和这3个区域相应的主要气候因素(年均温和年降水量)进行了对比,进而探讨了现代植被中C3/C4植物相对丰度与气候条件之间的关系.结果表明,温度条件对C4植物生物量贡献具有决定性影响;然而,即使温度条件满足C4植物生长的需要,随着温度的进一步上升,降水量应相应的下降,C4植物方能保持其优势地位.这一结果与对现代C4植物种属地理分布调查获得的结论基本是一致的.从而,这一结果为上述区域过去地质历史时期C3/C4植物相对丰度变化记录的古环境解译提供了重要的参考资料. | 饶志国 朱照宇 贾国东 陈发虎 BARTON Loukas 张家武 强明瑞 | 2010 | 科学通报2010，55，12： | 11 |
| 5 | Relationship between climatic conditions and the relative abundance of modern C_3 and C_4 plants in three regions around the North Pacific显示文摘Using -24‰ and -14‰ as the endpoints of stable carbon isotopic composition of total organic carbon (δ 13CTOC) of surface soil under pure C3 and C4 vegetation, and surface soil δ 13CTOC data from eastern China, Australia and the Great Plains of North America, we estimate the relative abundance of C3/C4 plants (i.e., the ratio of C3 or C4 biomass to local primary production) in modern vegetation for each region. The relative abundance of modern C3/C4 vegetation from each region is compared to the corresponding climatic parameters (mean annual temperature and precipitation) to explore the relationship between relative C4 abundance and climate. The results indicate that temperature controls the growth of C4 plants. However, even where temperature is high enough for the growth of C4 plants, they will only dominate the landscape when precipitation declines as temperatures increase. Our results are consistent with those of other investigations of the geographic distribution of modern C4 plant species. Therefore, our results provide an important reference for interpretation of past C3/C4 relative abundance records in these three regions. | RAO ZhiGuo ZHU ZhaoYu JIA GuoDong CHEN FaHu BARTON Loukas ZHANG JiaWu QIANG MingRui | 2010 | Chinese Science Bulletin2010，55，18： | 7 |
| 6 | 甘肃苏苗塬头地点石制品特征与古环境分析显示文摘苏苗塬头地点位于甘肃省平凉市庄浪县东北部,埋藏于章麻河二级阶地的典型马兰黄土中。经剖面清理和地表采集,2002和2004年在该地点共获得石制品2318件,本文以集中分布区出土(2166件)和地表采集(48件)共2214件石制品为主要研究对象。该批石制品以石片、碎片和碎屑为主,有少量石核和工具。剥片技术以砸击法为主,锤击法为辅,鲜见第二步加工。石制品原料主要为来自现代河床或阶地底部砾石层的脉石英。炭屑加速器质谱(AMS 14C)年代测试和多环境代用指标分析显示,苏苗塬头为一处旧石器时代晚期文化地点,人类活动主要发生于气候干冷的末次盛冰期(约距今2.4—1.8万年),反映了古人类较强的环境适应能力。 | 张东菊 陈发虎 吉笃学 L Barton PJ Brantingham 王辉 | 2011 | 人类学学报2011，30，3： | 7 |
| 7 | Archaeological records of Dadiwan in the past 60 ka and the origin of millet agriculture显示文摘This paper reports the recent excavation of Unit Dadiwan06 at the Dadiwan site in Qin’an County, Gansu.A 65 ka chronological framework is established for Dadiwan06 on the basis of absolute dating (AMS 14C and OSL), stratigraphy, climate change events and archaeology.Artifact distributions reveal patterns of human behavioral variation and adaptation over the past 60 ka, from primitive hunting and gathering to advanced hunting and gathering, to primitive Neolithic agriculture, and finally to advanced Neolithic agriculture. | ZHANG DongJu CHEN FaHu BETTINGER R L BARTON L JI DuXue MORGAN C WANG Hui CHENG XiaoZhong DONG GuangHui GUILDERSON T P ZHAO Hui | 2010 | Chinese Science Bulletin2010，55，16： | 6 |
| 8 | An approximate nonlinear modified Mohr-Coulomb shear strength criterion with critical state for intact rocks显示文摘In this paper, the Mohr-Coulomb shear strength criterion is modified by mobilising the cohesion and internal friction angle with normal stress, in order to capture the nonlinearity and critical state concept for intact rocks reported in the literature. The mathematical expression for the strength is the same as the classical form, but the terms of cohesion and internal friction angle depend on the normal stress now,leading to a nonlinear relationship between the strength and normal stress. It covers both the tension and compression regions with different expressions for cohesion and internal friction angle. The strengths from the two regions join continuously at the transition of zero normal stress. The part in the compression region approximately satisfies the conditions of critical state, where the maximum shear strength is reached. Due to the nonlinearity, the classical simple relationship between the parameters of cohesion, internal friction angle and uniaxial compressive strength from the linear Mohr-Coulomb criterion does not hold anymore. The equation for determining one of the three parameters in terms of the other two is supplied. This equation is nonlinear and thus a nonlinear equation solver is needed. For simplicity, the classical linear relationship is used as a local approximation. The approximate modified Mohr-Coulomb criterion has been implemented in a fracture mechanics based numerical code FRACOD,and an example case of deep tunnel failure is presented to demonstrate the difference between the original and modified Mohr-Coulomb criteria. It is shown that the nonlinear modified Mohr-Coulomb criterion predicts somewhat deeper and more intensive fracturing regions in the surrounding rock mass than the original linear Mohr-Coulomb criterion. A more comprehensive piecewise nonlinear shear strength criterion is also included in Appendix B for those readers who are interested. It covers the tensile, compressive, brittle-ductile behaviour transition and the critical state, and gives smooth transitions. | Baotang Shen Jingyu Shi Nick Barton | 2018 | Journal of Rock Mechanics and Geotechnical Engineering2018，10，4： | 6 |
| 9 | Childhood obesity: a life-long health risk显示文摘童年肥胖在全世界为医生,父母,和健康机构成为了主要健康担心。童年肥胖在生活不仅在青春期间而且以后为另外的疾病与增加的风险被联系,包括糖尿病,动脉的高血压,冠的动脉疾病,和脂肪肝疾病。重要地,肥胖在孩子和年轻成年人已经加速动脉粥样硬化前进。关于在 vasculature 的 pathophysiological 变化,与老化和肥胖相关的畸形有关的生理的变化的惹人注目的类似与肥胖引起 “ 的概念兼容; premature”脉管的老化。这篇文章考察由于肥胖位于加速的脉管的疾病发展下面的因素。它也强调在加重另外的疾病的发展作为一个疾病条件和它的容许的角色认出童年肥胖的重要性。为在生活以后的疾病危险性的童年肥胖的重要性,和对预防和治疗的需要也被讨论。 | Matthias BARTON | 2012 | Acta Pharmacologica Sinica2012，33，2： | 5 |
| 10 | Clinical outcomes following salvage Gamma Knife radiosurgery for recurrent glioblastoma显示文摘Glioblastoma multiforme(GBM) is the most common malignant primary brain tumor with a survival prognosis of 14-16 mo for the highest functioning patients. Despite aggressive, multimodal upfront therapies, the majority of GBMs will recur in approximately six months. Salvage therapy options for recurrent GBM(r GBM) are an area of intense research. This study compares recent survival and quality of life outcomes following Gamma Knife radiosurgery(GKRS) salvage therapy. Following a Pub Med search for studies usingGKRS as salvage therapy for malignant gliomas, nine articles from 2005 to July 2013 were identified which evaluated rG BM treatment. In this review, we compare overall survival following diagnosis, overall survival following salvage treatment, progression-free survival, time to recurrence, local tumor control, and adverse radiation effects. This report discusses results for rG BM patient populations alone, not for mixed populations with other tumor histology grades. All nine studies reported median overall survival rates(from diagnosis, range:16.7-33.2 mo; from salvage, range:9-17.9 mo). Three studies identified median progression-free survival(range:4.6-14.9 mo). Two showed median time to recurrence of GBM. Two discussed local tumor control. Six studies reported adverse radiation effects(range:0%-46% of patients). The greatest survival advantages were seen in patients who received GKRS salvage along with other treatments, like resection or bevacizumab, suggesting that appropriately tailored multimodal therapy should be considered with each rG BM patient. However, there needs to be a randomized clinical trial to test GKRS for rG BM before the possibility of selection bias can be dismissed. | Erik W Larson Halloran E Peterson Wayne T Lamoreaux Alexander R MacKay Robert K Fairbanks Jason A Call Jonathan D Carlson Benjamin C Ling John J Demakas Barton S Cooke Christopher M Lee | 2014 | World Journal of Clinical Oncology2014，5，2： | 5 |
| 11 | The shear strength of rock joints in theory and practice显示文摘 | N. Barton V. Choubey | 1978 | Rock Mechanics Felsmechanik Mécanique des Roches1978，，1： | 5 |
| 12 | Understanding the need for pre-injection from permeability measurements: What is the connection?显示文摘Pre-grouting ahead of tunnels has three main functions:to control water inflow into the tunnel,to limit groundwater drawdown above the tunnel,and to make tunnelling progress more predictable since rock mass quality is effectively improved.It helps to avoid settlement damage caused by consolidation of clay deposits beneath built-up areas,since towns tend to be built where terrain is more flat,due to the clay deposits.There are so many instances of settlement damage that the profession needs to take note of the need for high-pressure pre-grouting,to use micro-cements and micro-silica additives.The use of highpressure injection may cause joint jacking,but this is local in extent when the rapid pressure decay away from an injection hole is understood.This effect is variable and depends on the geometrical parameters of the joints.This pressure-decay advantage must not be violated by maintaining high pressure when grout flow from the injection hole has ceased.The latter can cause damage to the grouting already achieved.Simplified methods of estimating mean hydraulic apertures(e)from Lugeon testing are described,and from more sophisticated three-dimensional(3D)permeability measurement.The estimation of the larger mean physical joint apertures(E)is based on the joint roughness coefficient(JRC).Comparison is then made with the empirical aperture-particle size criterion E>4d95,where d95 represents almost the largest cement particle size.Depending on joint set orientations and on the available micro-cements,the decision must be made of which range of pre-injection pressure should be aimed for,using successive reductions of the water-cement ratio w/c.More simple estimation of permeability,also with depth dependence,can be made with the empirical link between a modified rock mass quality Q and permeability,which is termed QH2O.The value of this parameter can be based on core-logging or intunnel face logging.The 3D before-and-after-grouting permeability measurements have been used to justify the quantification of rock mass quality Q-parameter improvement,and the consequent increases in expected P-wave velocity and deformation modulus,for application in dam foundation treatment and its monitoring. | Nick Barton Eda Quadros | 2019 | Journal of Rock Mechanics and Geotechnical Engineering2019，11，3： | 5 |
| 13 | Risk of shear failure and extensional failure around over-stressed excavations in brittle rock显示文摘The authors investigate the failure modes surrounding over-stressed tunnels in rock.Three lines of investigation are employed:failure in over-stressed three-dimensional(3D) models of tunnels bored under 3D stress,failure modes in two-dimensional(2D) numerical simulations of 1000 m and 2000 m deep tunnels using FRACOD,both in intact rock and in rock masses with one or two joint sets,and finally,observations in TBM(tunnel boring machine) tunnels in hard and medium hard massive rocks.The reason for 'stress-induced' failure to initiate,when the assumed maximum tangential stress is approximately(0.4-0.5)σ_c(UCS,uniaxial compressive strength) in massive rock,is now known to be due to exceedance of a critical extensional strain which is generated by a Poisson's ratio effect.However,because similar 'stress/strength' failure limits are found in mining,nuclear waste research excavations,and deep road tunnels in Norway,one is easily misled into thinking of compressive stress induced failure.Because of this,the empirical SRF(stress reduction factor in the Q-system) is set to accelerate as the estimated ratio σ_(θmax)/σ_c >> 0.4.In mining,similar 'stress/strength' ratios are used to suggest depth of break-out.The reality behind the fracture initiation stress/strength ratio of '0.4' is actually because of combinations of familiar tensile and compressive strength ratios(such as 10) with Poisson's ratio(say0.25).We exceed the extensional strain limits and start to see acoustic emission(AE) when tangential stress σθ≈ 0.4σc,due to simple arithmetic.The combination of 2D theoretical FRACOD models and actual tunnelling suggests frequent initiation of failure by 'stable' extensional strain fracturing,but propagation in 'unstable' and therefore dynamic shearing.In the case of very deep tunnels(and 3D physical simulations),compressive stresses may be too high for extensional strain fracturing,and shearing will dominate,both ahead of the face and following the face.When shallower,the concept of 'extensional strain initiation but propagation' in shear is suggested.The various failure modes are richly illustrated,and the inability of conventional continuum modelling is emphasized,unless cohesion weakening and friction mobilization at different strain levels are used to reach a pseudo state of yield,but still considering a continuum. | Nick Barton Baotang Shen | 2017 | Journal of Rock Mechanics and Geotechnical Engineering2017，9，2： | 5 |
| 14 | The shear strength of rock joints in theory and practice显示文摘 | N. Barton V. Choubey | 1977 | Rock Mechanics Felsmechanik Mécanique des Roches (-)1977，，1： | 5 |
| 15 | Nonlinear shear behavior of rock joints using a linearized implementation of the Barton-Bandis model显示文摘Experiments on rock joint behaviors have shown that joint surface roughness is mobilized under shearing,inducing dilation and resulting in nonlinear joint shear strength and shear stress vs.shear displacement behaviors.The Barton-Bandis(B-B) joint model provides the most realistic prediction for the nonlinear shear behavior of rock joints.The B-B model accounts for asperity roughness and strength through the joint roughness coefficient(JRC) and joint wall compressive strength(JCS) parameters.Nevertheless,many computer codes for rock engineering analysis still use the constant shear strength parameters from the linear Mohr-Coulomb(M-C) model,which is only appropriate for smooth and non-dilatant joints.This limitation prevents fractured rock models from capturing the nonlinearity of joint shear behavior.To bridge the B-B and the M C models,this paper aims to provide a linearized implementation of the B-B model using a tangential technique to obtain the equivalent M-C parameters that can satisfy the nonlinear shear behavior of rock joints.These equivalent parameters,namely the equivalent peak cohesion,friction angle,and dilation angle,are then converted into their mobilized forms to account for the mobilization and degradation of JRC under shearing.The conversion is done by expressing JRC in the equivalent peak parameters as functions of joint shear displacement using proposed hyperbolic and logarithmic functions at the pre-and post-peak regions of shear displacement,respectively.Likewise,the pre-and post-peak joint shear stiffnesses are derived so that a complete shear stress-shear displacement relationship can be established.Verifications of the linearized implementation of the B-B model show that the shear stress-shear displacement curves,the dilation behavior,and the shear strength envelopes of rock joints are consistent with available experimental and numerical results. | Simon Heru Prassetyo Marte Gutierrez Nick Barton | 2017 | Journal of Rock Mechanics and Geotechnical Engineering2017，9，4： | 4 |
| 16 | Engineering classification of rock masses for the design of tunnel support显示文摘 | N. Barton R. Lien J. Lunde | 1974 | Rock Mechanics Felsmechanik Mécanique des Roches1974，，4： | 4 |
| 17 | Effect of tellurium on the microstructure and mechanical properties of Fe-14Cr oxide-dispersion-strengthened steels produced by additive manufacturing显示文摘Conventionally,Te has primarily been used to improve the machinability of steel and its alloys.In this work,Te was used to refine the grains of an oxide-dispersion-strengthened(ODS)steel produced by additive manufacturing(AM)with fixed processing parameters.Addition of Te to the raw powder produced an ODS steel with a fine-grained microstructure,in contrast to the ODS steel manufactured without Te.Moreover,the addition of Te resulted in superior yield strength and ultimate tensile strength,which was attributed to the combined effects of grain refinement and the finer nanoparticles(NPs)composed of Terich composite NPs and Cr-rich NPs.For the first time,the AM technique was used to obtain grain and nanoparticle sizes of~3.4μm and 6 nm,respectively,from the Te-added ODS steel. | Barton Mensah Arkhurst Jee Hwan Bae Min Young Na Hye Jung Chang Hyun Gil Kim Il Hyun Kim Ho Jin Ryu Jeoung Han Kim | 2021 | Journal of Materials Science & Technology2021，，36： | 3 |
| 18 | 小P值并不能保证可靠结果:以帕金森病的静息态脑功能成像元分析为例显示文摘Thousands of resting state functional magnetic resonance imaging(RS-f MRI)articles have been published on brain disorders.For precise localization of abnormal brain activity,a voxel-level comparison is needed.Because of the large number of voxels in the brain,multiple comparison correction(MCC)must be performed to reduce false positive rates,and a smaller P value(usually including either liberal or stringent MCC)is widely recommended[1]. | 贾熙泽 赵娜 董昊铭 孙家伟 Marek Barton Roxana Burciu Nicolas Carrière Antonio Cerasa 陈博宇 陈俊 Stephen Coombes Luc Defebvre Christine Delmaire Kathy Dujardin Fabrizio Esposito 范国光 Federica Di Nardo 冯怡萱 Brett W.Fling Saurabh Garg Moran Gilat Martin Gorges Shu-Leong Ho Fay B.Horak 胡晓 胡晓飞 黄飚 黄沛钰 贾泽娟 Christina Jones Jan Kassubek Lenka Krajcovicova Ajay Kurani 李静 李晴 刘爱萍 刘波 刘虎 刘卫国 Renaud Lopes 娄毓婷 罗巍 Tara Madhyastha 毛妮妮 Grainne McAlonan Martin J.McKeown Shirley Pang Andrea Quattrone Irena Rektorova Alessia Sarica 商慧芳 James M.Shine Priyank Shukla Tomas Slavicek 宋潇鹏 Gioacchino Tedeschi Alessandro Tessitore David Vaillancourt 王健 王珏 Z.Jane Wang 魏鲁庆 邬霞 徐晓俊 闫磊 杨靓 杨万群 姚乃琳 张得龙 张久权 张敏鸣 张艳玲 周彩红 严超赣 左西年 Mark Hallett 吴涛 臧玉峰 | 2021 | Science Bulletin2021，66，21： | 3 |
| 19 | Optimizing CT for the evaluation of vestibular aqueduct enlargement:Inter-rater reproducibility and predictive value of reformatted CT measurements显示文摘Enlarged vestibular aqueduct(EVA), the most frequent identifiable cause of congenital hearing loss, is evaluated with high-definition multidetector CT in the axial plane. Our purpose was to determine which reformatted CT measurements are most reproducible. Seven multiplanar reformatted images were created for each of the 64 temporal bones in patients with EVA. Intraclass correlation coefficients(ICC) were used to assess inter-observer variability, and both linear regression and ROC analyses were used to compare the measurements with severity of hearing loss, as assessed by pure tone audiometry. All seven measurements had excellent inter-observer variability, with average-measure ICC ranging from 0.92 to 0.98. There was no statistically significant correlation between the radiologic degree of aqueduct enlargement and severity of hearing loss using any of the seven measurements; ROC analyses revealed areas under the curves ranging from 0.57 to 0.73. Optimal accuracy was obtained with a threshold of 1.75 mm as measured at the aqueductal aperture in the P€oschl plane, with sensitivity of 0.75 and specificity of0.63. Although the radiologic measurement may not serve as a reliable tool for assessing severity of EVA, P€oschl plane reformatting has proven to be better than conventional axial acquisition plane for identifying patients with clinically significant hearing loss. | Misun Hwang Ryan Marovich Samuel S.Shin David Chi Barton F.Branstetter IV | 2015 | Journal of Otology2015，10，1： | 2 |
| 20 | Comparison of conjunctival autografts, amniotic membrane grafts, and primary closure for pterygium excision显示文摘 | P. Prabhasawat K. Barton G. Burkett S.C. Tseng | 1997 | Ophthalmology1997，，6： | 2 |
您所在的机构暂未开通此部分的功能，请联系管理员