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| 1 | Two-dimensional speckle tracking echocardiography for the assessment of atrial function显示文摘Echocardiography is the most common diagnostic method for assessing atrial function but the technique has some limitations. Traditionally, assessment of left atrial function has been performed by measuring volumes with 2D echocardiography. Additionally, it can be assessed with transmitral Doppler and pulmonary vein Doppler. Recently, an alternative method has been incorporated, namely, measurement of myocardial deformation with color tissue Doppler-derived strain. However, this method has several limitations, such as suboptimal reproducibility, angle-dependence, signal artifacts and the fact that it only measures regional strain and does not obtain information about the curved portion of the atrial roof. To overcome these limitations in the quantification of atrial function, the use of speckle tracking echocardiography (STE) strain has been proposed. This technique is not derived from Doppler but rather from 2D echocardiography; it is angle-independent and allows one to measure global as well as regional atrial strain. In this editorial, we describe the physical and pathophysiological concepts of STE and underline the clinical usefulness of this new technique. | Tomás Francisco Cianciulli María Cristina Saccheri Jorge Alberto Lax Alejandra Marina Bermann Daniel Ernesto Ferreiro | 2010 | World Journal of Cardiology2010，2，7： | 39 |
| 2 | 枯草芽孢杆菌B47高产拮抗物质菌株的紫外诱变选育(英文)显示文摘[Objective] The aim of this study was to breed new strains which have higher inhibitory effects on the pathogens of watermelon fusarium wilt.[Method] The endophytic Bacillus subtilis B47 strain was obtained from tomato stems by UV mutagenesis for two consecutive times,then genetic stability as well as physiological and biochemical properties of mutant strains were studied.[Result] The antibacterial activity of all the three mutant strains F303,F304 and F305 was higher than that of B74 strain.After subculture of 10 successive generations,the antibacterial activity of all the three mutant strains for the pathogens of watermelon fusarium wilt decreased,but the antibacterial activity of F305 strain decreased the least,indicating its best genetic stability among the tested strains.The antibacterial circle diameter of F305 strain was 5 mm larger than that of wild strain B47 under the same condition.The mutant strain F305 was in logarithmic growth phase within 36 h and in stationary phase within 36-96 h,while its optimum growth temperature was 35 ℃.F305 strain could grow in sodium salt with the concentration of 1%-10%,but it grew best at the concentration of 1%.Physiological and biochemical responses of F305 strain were in accordance with those of wild strain B47.[Conclusion] This study lays the foundation for the factorial production of antagonistic substance by B47 strain and new methods of preventing from the pathogens watermelon fusarium wilt. | 王静 朱建华 林纬 黄永禄 袁高庆 黎起秦 | 2008 | Agricultural Science & Technology2008，9，4： | 28 |
| 3 | 单菌多次级代谢产物方法及其在微生物代谢产物研究中的应用显示文摘微生物次级代谢产物的结构多样性赋予其广泛的生物活性,是药物先导化合物的重要来源。然而传统单一的培养方法,使微生物中大量的代谢途径不能被表达,以至于许多代谢产物不能产生。因此,运用各种技术和方法激活这些沉默途径,获得结构多样的代谢产物已成为目前关注的热点。单菌多次级代谢产物(Onestrainmany compounds,OSMAC)策略作为一种简便有效的研究手段,已成功应用于该领域的研究。本文综述了OSMAC策略中常用的研究手段(包括改变培养状态、混合培养及添加酶抑制剂等),以及OSMAC与基因组扫描技术相结合的研究进展,并介绍了本研究室利用此方法对高产细胞松弛素的海洋来源真菌曲丽穗霉(Spicaria elegans KLA03)进行研究的部分结果。 | 韦洪娟 林贞建 李德海 顾谦群 朱天骄 | 2010 | 微生物学报2010，50，6： | 21 |
| 4 | Strain and shear types of the Louzidian ductile shear zone in southern Chifeng, Inner Mongolia, China显示文摘The Louzidian ductile shear zone at the south of Chifeng strikes NE-SW and dips SE at low-medium- angles. This ductile shear zone is mainly composed of granitic mylonite, which grades structurally upward into a chloritized zone, a microbreccia zone, a brittle fault and a gouge zone. All these zones share similar planar attitudes, but contain different linear attitudes and kinematic indicators. Finite strain measurements were performed on feldspar porphyroclasts using the Fry method. These meas- urements yield Fulin indexes of 1.25―3.30, Lode's parameters of -0.535―-0.112 and strain parameters of 0.41―0.75 for the protomylonite, respectively. These data are plotted within the apparent constric- tional field in Fulin and Hossack diagrams. In contrast, for the mylonite, corresponding parameters are 0.99―1.43, -0.176―-0.004 and 0.63―0.82, respectively, and located in the apparent constrictional field close to the plane strain. The mean kinematic vorticity numbers of the protomylonite and mylonite by using three methods of polar Mohr circle, porphyroclast hyperbolic and oblique foliation, are in the range of 0.67―0.95, suggesting that the ductile shearing is accommodated by general shearing that is dominated by simple shear. Combination of the finite strain and kinematic vorticity indicates that shear type was lengthening shear and resulted in L-tectonite at the initial stage of deformation and the shear type gradually changed into lengthening-thinning shear and produced L-S-tectonite with the uplifting of the shear zone and accumulating of strain. These kinds of shear types only produce a/ab strain facies, so the lineation in the ductile shear zone could not deflect 90° in the progressively deformation. | WANG XinShe ZHENG YaDong WANG Tao | 2007 | Science China Earth Sciences2007，50，4： | 20 |
| 5 | Contemporary crustal tectonic movement in the southern Sichuan-Yunnan block based on dense GPS observation data显示文摘We analyzed 360 permanent and campaign GPS data from 1999 to 2017 in the southern Sichuan-Yunan block, and obtained crustal horizontal deformation in this region.Then, we derived the strain rate using a multi-scale spherical wavelet method.Results reveal a complex pattern of tectonic movement in the southern Sichuan-Yunnan block.Compared to the stable Eurasian plate, the maximum rate of the horizontal deformation in the southern Sichuan-Yunnan block is approximately 22 mm/a.The Xiaojiang fault shows a significantly lower deformation—a left-lateral strike-slip movement of 9.5 mm/a.The Honghe fault clearly shows a complex segmental deformation from the north to south.The northern Honghe fault shows 4.3 mm/a right strike-slip with 6.7 mm/a extension; the southern Honghe fault shows 1.9 mm/a right strike-slip with 1.9 mm/a extension; the junction zone in the Honghe and Lijiang–Xiaojinhe faults shows an obvious clockwise-rotation deformation.The strain calculation results reveal that the maximum shear-strain rate in this region reaches 70 nstrain/a, concentrated around the Xiaojiang fault and at the junction of the Honghe and Lijiang–Xiaojinhe faults.We note that most of the earthquakes with magnitudes of 4 and above that occurred in this region were within the high shear strain-rate zones and the strain rate gradient boundary zone, which indicates that the magnitude of strain accumulation is closely related to the seismic activities.Comparison of the fast shear-wave polarization direction of the upper-crust with the upper-mantle anisotropy and the direction of the surface principal compressive strain rate obtained from the inversion of the GPS data reveals that the direction of the surface principal compressive strain is basically consistent with the fast shear-wave polarization direction of the upper crust anisotropy, but different from the polarization direction of the upper mantle.Our results support the hypothesis that the principal elements of the deformation mechanism in the southern Sichuan-Yunnan block are decoupling between the upper and lower crust and ductile flow in the lower crust. | HongLin Jin Yuan Gao XiaoNing Su GuangYu Fu | 2019 | Earth and Planetary Physics2019，3，1： | 18 |
| 6 | 一种亚稳β钛合金的加工图(英文)显示文摘为了挖掘亚稳β钛合金Ti-B19的热变形加工潜力,采用热模拟试验机,在温度范围750-1000°C,温度间隔50°C,应变速率为0.001-10s-1的条件下对Ti-B19合金的热压缩行为进行研究。结果表明,一定温度下,Ti-B19合金的流变应力随应变速率的增大而增大;一定应变速率下,合金的流变应力则随温度的升高而降低。当应变ε为0.6时,合金的加工图可分为3个区域。700-800°C,应变速率为0.001-0.1s-1,合金最大的能量耗散效率值出现在750°C和0.01s-1处,其数值为42%,出现连续软化之前,此区域的流变曲线中只出现单个峰或振荡峰。第2个区域的温度范围在800-1000°C,应变速率范围为0.001-0.1s-1,能量耗散效率值在29%~36%之间变化。此区域的流变曲线到达稳态之前只出现单个峰或振荡峰,此时可观察到典型的再结晶组织。温度低于800°C,应变速率大于0.1s-1,或者温度高于800°C,应变速率大于10s-1时,合金中会出现典型的流变不稳定的第3区,组织中可观察到绝热剪切带或β相流变不均匀区。 | 曾立英 杨冠军 葛鹏 毛小南 赵永庆 周廉 | 2010 | 稀有金属材料与工程2010，39，9： | 18 |
| 7 | Movement and strain conditions of active blocks in the Chinese mainland显示文摘The definition of active block is given from the angles of crustal deformation and strain. The movement and strain parameters of active blocks are estimated according to the unified velocity field composed of the velocities at 1598 GPS stations obtained from GPS measurements carried out in the past years in the Chinese mainland and the surrounding areas. The movement and strain conditions of the blocks are analyzed. The active blocks in the Chinese mainland have a consistent E-trending movement component, but its N and S components are not consistent. The blocks in the western part have a consistent N-trending movement and the blocks in the eastern part have a consistent S-trending movement. In the area to the east of 90°E, that is the area from Himalayas block towards NE, the movement direction of the blocks rotates clockwisely and the movement rates of the blocks are different. Generally, the movement rate is large in the west and south and small in the east and north with a difference of 3 to 4 times between the rates in the west and east. The distributions of principal compressive strain directions of the blocks are also different. The principal strain of the blocks located to the west of 90oE is basically in the SN direction, the principal compressive strain of the blocks in the northeastern part of Qingzang plateau is roughly in the NE direction and the direction of principal compressive strain of the blocks in the southeastern part of Qingzang plateau rounds clockwisely the east end of Himalayas structure. In addition, the principal strain and shear strain rates of the blocks are also different. The Himalayas and Tianshan blocks have the largest principal compressive strain and the maximum shear strain rate. Then, Lhasa, Qiangtang, Southwest Yunnan (SW Yunnan), Qilian and Sichuan-Yunan (Chuan-Dian) blocks followed. The strain rate of the blocks in the eastern part is smaller. The estimation based on the stain condition indicates that Himalayas block is still the area with the most intensive tectonic activity and it shortens in the NS direction at the rate of 15.2±1.5 mm/a. Tianshan block ranks the second and it shortens in the NS direction at the rate of 10.1±0.9 mm/a. At present, the two blocks are still uprising. It can be seen from superficial strain that the Chinese mainland is predominated by superficial expansion. Almost the total area in the eastern part of the Chinese mainland is expanded, while in the western part, the superficial compression and expansion are alternatively distributed from the south to the north. In the Chinese mainland, most EW-trending or proximate EW-trending faults have the left-lateral or left-lateral strike-slip relative movements along both sides, and most NS-trending faults have the right-lateral or right-lateral strike-slip relative movements along both sides. According to the data from GPS measurements the left-lateral strike-slip rate is 4.8±1.3 mm/a in the central part of Altun fault and 9.8±2.2 mm/a on Xianshuihe fault. The movement of the fault along the block boundary has provided the condition for block movement, so the movements of the block and its boundary are consistent, but the movement levels of the blocks are different. The statistic results indicate that the relative movement between most blocks is quite significant, which proves that active blocks exist. Himalayas, Tianshan, Qiangtang and SW Yunnan blocks have the most intensive movement; China-Mongolia, China-Korea (China-Korea), Alxa and South China blocks are rather stable. The mutual action of India, Pacific and Philippine Sea plates versus Eurasia plate is the principal driving force to the block movement in the Chinese mainland. Under the NNE-trending intensive press from India plate, the crustal matter of Qingzang plateau moves to the NNE and NE directions, then is hindered by the blocks located in the northern, northeastern and eastern parts. The crustal matter moves towards the Indian Ocean by the southeastern part of the plateau. | LI Yanxing (李延兴) YANG Guohua (杨国华) LI Zhi (李 智) GUO Liangqian (郭良迁) HUANG Cheng (黄珹) ZHU Wenyao (朱文耀) FU Yang (符 养) WANG Qi (王 琪) JIANG Zaisen (江在森) WANG Min (王 敏) | 2003 | Science China Earth Sciences2003，46，z2： | 17 |
| 8 | Strain and kinematic vorticity analysis:An indicator for sinistral transpressional strain-partitioning along the Lancangjiang shear zone,western Yunnan,China显示文摘This work deals with the preliminary relationship between strain path and strain partitioning pattern in a sinistral transpressional zone,Lancangjiang shear zone,located to the southeast of Tibet.Various ductile rocks provide an opportunity to investigate quantitative finite strain(Rs),kinematic vorticity values(Wm),and proportions of simple and pure shear components.The mean kinematic vorticity values(Wm) were evaluated based on three methods,such as Rs-θ,prophyroclast hyperbolic distribution method(PHD),and polar Mohr diagram construction(PMD).Wm for mylonitic metasediments of the low-grade schist belt ranged from 0.19 to 0.54.Protomylonites,mylonites,and ultramylonites recorded differential Wm values,0.19―0.73,0.11―0.8,and 0.84―0.95(even 0.99) respectively in the high-grade gneiss belt.Based on classical strain analysis and these kinematic vorticity evaluations,the shear zone is classified as a preliminarily bulk monoclinic symmetry.The pattern of vorticity path suggests that a previously undocumented transpressional setting and strain partitioning pattern in the southeast region of Tibet Plateau,characterized by steep-narrow domain of simple-shearing(Tertiary strike-slip shearing) deformation and wider domain of mostly pure-shearing(Tertiary contraction) to accommo-date intracontinental deformation. | Bo Zhang JinJiang Zhang DaLai Zhong Lei Guo | 2009 | Science China Earth Sciences2009，52，5： | 16 |
| 9 | Diabetic cardiomyopathy: Pathophysiology, theories and evidence to date显示文摘The prevalence of type 2 diabetes(T2D)has increased worldwide and doubled over the last two decades.It features among the top 10 causes of mortality and morbidity in the world.Cardiovascular disease is the leading cause of complications in diabetes and within this,heart failure has been shown to be the leading cause of emergency admissions in the United Kingdom.There are many hypotheses and well-evidenced mechanisms by which diabetic cardiomyopathy as an entity develops.This review aims to give an overview of these mechanisms,with particular emphasis on metabolic inflexibility.T2D is associated with inefficient substrate utilisation,an inability to increase glucose metabolism and dependence on fatty acid oxidation within the diabetic heart resulting in mitochondrial uncoupling,glucotoxicity,lipotoxicity and initially subclinical cardiac dysfunction and finally in overt heart failure.The review also gives a concise update on developments within clinical imaging,specifically cardiac magnetic resonance studies to characterise and phenotype early cardiac dysfunction in T2D.A better understanding of the pathophysiology involved provides a platform for targeted therapy in diabetes to prevent the development of early heart failure with preserved ejection fraction. | Lavanya Athithan Gaurav S Gulsin Gerald P McCann Eylem Levelt | 2019 | World Journal of Diabetes2019，10，10： | 15 |
| 10 | Effect of Helicobacter pylori infection on gastric epithelial cell proliferation显示文摘INTRODUCTION Helicobacter pylori(H.pylori)infection is one ofthe main pathogens of chronic gastritis and duodenalulcer(DU),and it may be considered as a riskfactor in the incidence of gastric cancer.H.pylori infection may lead to the anomaly of gastricepithelial cell proliferation which is closely relatedto the development of gastric cancer.Vacuolatingcytotoxin(VacA)is an important virulence andvacA subtype determines the toxic activity.According to its signal sequence,it can be groupedinto type sla,slb,slc and s2.Strains harboringvacAsla are more closely related with digestivediseases and may be the strains with high toxicity.The effect of H.pylori infection on | Gao H Wang JY Shen XZ Liu JJ | 2000 | World Journal of Gastroenterology2000，6，3： | 14 |
| 11 | GLOBAL ATTRACTOR OF NONLINEAR STRAIN WAVES IN ELASTIC WAVEGUIDES显示文摘The initial-boundary value problem of the propagation of nonlinear longitudinal elastic waves in an initially strained rod is considered. The rod is assumed to interact with the surrouding elastic and viscous external medium. The long time behavior of solutions are derived and global attractors in E1 space is obtained. | 戴正德 郭柏灵 | 2000 | Acta Mathematica Scientia2000，20，3： | 14 |
| 12 | Theoretical and experimental study on relationship between stress-strain and temperature variation显示文摘Principle on temperature response to the stress-strain variation is fundamental to the relationship between thermal radiation variation and stress-strain field. Current research indicates that temperature has a sensitive response to rock deformation under the condition of normal temperature background. However, the basic physical relationship between deformation and temperature variation is not clear and need to be investigated further. In this paper, principle on temperature response to stress-strain variation is studied in detail, based on thermodynamics, elastic strain theory, and experiments on both ideal material and rock. In the stage of elastic deformation, results indicate that: 1) temperature increment is positively correlated with volume strain variation. Temperature rises with hydrostatic pressure increase. In other words, temperature rises when the specimen is under the compressive state whereas temperature drops under the tensile state. 2) Pure shear deformation does not contribute to tempera- ture variation. Namely, shape change of specimen does not produce temperature variation. However, there exist the relative tensile area and the compressive one in the specimen under the state of pure shear. Temperature drops within the relative tensile area while temperature rises within the compressive areas during the process of loading. | CHEN ShunYun LIU LiQiang LIU PeiXun MA Jin CHEN GuoQiang | 2009 | Science China Earth Sciences2009，52，11： | 13 |
| 13 | Method for Measuring Residual Stresses Induced by Boring in Internal Surface of Tube and Its Validation with XRD Method显示文摘Residual stresses can have a strong effect on the usability of machined parts,and the X-ray diffraction(XRD)measuring equipment,which is commonly used to measure residual stresses,is very expensive.This paper presents a method of measuring the residual stresses induced by boring in the internal surface of a tube with much cheaper equipment.The method,called the strain-based method is mainly based on the strains measured on the external surface of the tube.It is proposed on the basis of the very long tube assumption.The finite element method(FEM)analysis is thus used to validate the length of the tube.Guided by the FEM results,an appropriate length of the tube is chosen,and the residual stresses are obtained from both the strain-based method and the XRD method.Stress profiles obtained from both two methods are compared.The comparison result indicates that the profiles of the two methods agree well with each other.Therefore,it can be concluded that the accuracy of the strain-based method is high enough,and it can be applied to residual stress measurement in practice. | 孟龙晖 何宁 杨吟飞 赵威 戎斌 | 2014 | Transactions of Nanjing University of Aeronautics and Astronautics2014，31，5： | 13 |
| 14 | Specimen aspect ratio and progressive field strain development of sandstone under uniaxial compression by three-dimensional digital image correlation显示文摘The complete stress-strain characteristics of sandstone specimens were investigated in a series of quasistatic monotonic uniaxial compression tests.Strain patterns development during pre-and post-peak behaviours in specimens with different aspect ratios was also examined.Peak stress,post-peak portion of stress-strain,brittleness,characteristics of progressive localisation and field strain patterns development were affected at different extents by specimen aspect ratio.Strain patterns of the rocks were obtained by applying three-dimensional(3D) digital image correlation(DIC) technique.Unlike conventional strain measurement using strain gauges attached to specimen,3D DIC allowed not only measuring large strains,but more importantly,mapping the development of field strain throughout the compression test,i.e.in pre-and post-peak regimes.Field strain development in the surface of rock specimen suggests that strain starts localising progressively and develops at a lower rate in pre-peak regime.However,in post-peak regime,strains increase at different rates as local deformations take place at different extents in the vicinity and outside the localised zone.The extent of localised strains together with the rate of strain localisation is associated with the increase in rate of strength degradation.Strain localisation and local inelastic unloading outside the localised zone both feature post-peak regime. | H. Munoz A. Taheri | 2017 | Journal of Rock Mechanics and Geotechnical Engineering2017，9，4： | 13 |
| 15 | Uniaxial experimental study of the acoustic emission and deformation behavior of composite rock based on 3D digital image correlation(DIC)显示文摘In this paper, uniaxial compression tests were carried out on a series of composite rock specimens with different dip angles, which were made from two types of rock-like material with different strength. The acoustic emission technique was used to monitor the acoustic signal characteristics of composite rock specimens during the entire loading process. At the same time, an optical non-contact 3 D digital image correlation technique was used to study the evolution of axial strain field and the maximal strain field before and after the peak strength at different stress levels during the loading process. The effect of bedding plane inclination on the deformation and strength during uniaxial loading was analyzed. The methods of solving the elastic constants of hard and weak rock were described. The damage evolution process, deformation and failure mechanism, and failure mode during uniaxial loading were fully determined. The experimental results show that the θ = 0?–45?specimens had obvious plastic deformation during loading, and the brittleness of the θ = 60?–90?specimens gradually increased during the loading process. When the anisotropic angle θincreased from 0?to 90?, the peak strength, peak strain,and apparent elastic modulus all decreased initially and then increased. The failure mode of the composite rock specimen during uniaxial loading can be divided into three categories:tensile fracture across the discontinuities(θ = 0?–30?), slid-ing failure along the discontinuities(θ = 45?–75?), and tensile-split along the discontinuities(θ = 90?). The axial strain of the weak and hard rock layers in the composite rock specimen during the loading process was significantly different from that of the θ = 0?–45?specimens and was almost the same as that of the θ = 60?–90?specimens. As for the strain localization highlighted in the maximum principal strain field, the θ = 0?–30?specimens appeared in the rock matrix approximately parallel to the loading direction,while in the θ = 45?–90?specimens it appeared at the hard and weak rock layer interface. | Jian-Long Cheng Sheng-Qi Yang Kui Chen Dan Ma Feng-Yuan Li Li-Ming Wang | 2017 | Acta Mechanica Sinica2017，33，6： | 13 |
| 16 | Wearable strain sensing textile based on one-dimensional stretchable and weavable yarn sensors显示文摘Flexible, wearable, and even stretchable sensors are the key components ofsmart electronic textiles. However, most reported flexible and wearable sensorsfor wearable electronics are usually fabricated in two-dimensional (2D) planarstrip configurations, which cannot be properly integrated into textile structuresand thus greatly degrade intrinsic properties such as the softness, flexibility, andair permeability of textiles and the aesthetic feeling of clothing. In this work, a newone-dimensional weavable strain sensing yarn consisting of an elastic polyurethane(PU) core, a conductive Ag-nanopartides/graphene-microsheets composite sheath,and a silicone encapsulation layer was designed and fabricated through aneasily manipulated protocol. Arising from the reasonable structural design andappropriate material selection, the as-fabricated strain sensor not only exhibitedexcellent flexibility, stretchability, and highly repeatable electromechanicalstability (a repeatability error of 1.56%) but also possessed both high sensitivity(a gauge factor of nearly 500) and a relatively wide working range (0-50%applied strain) with good linearity (a correlation coefficient of 0.98). In addition,the facile, nearly all-solution-based fabrication protocol enabled the scalableproduction of long conductive yams. Thus, the proper yarn length and superbmechanical properties endowed the stretchable conductive yarn with goodweavability. The excellent wearability of the stretchable conductive yarn wasderived from the outermost isolating, hydrophobic, and biocompatible siliconeencapsulation layer. A wearable high-sensitivity strain sensing textile, fabricatedby directly weaving the as-prepared yarn-based sensor, showed great potentialfor application to wearable textile sensors for real-time monitoring of humanmotions from vigorous walkin~ to subtle and complex pronunciations. | Xiaoting Li Haibo Hu Tao Hua Bingang Xu Shouxiang Jiang | 2018 | Nano Research2018，11，11： | 13 |
| 17 | Dynamic compression characteristics of layered rock mass of significant strength changes in adjacent layers显示文摘Layered rock mass of significant strength changes for adjacent layers is frequently observed in underground excavation,and dynamic loading is a prevalent scenario generated during excavation.In order to improve the driving efficiency and reduce engineering accidents,dynamic compression characteristics of this kind of rock mass should be understood.The dynamic properties of a layered composite rock mass are investigated through a series of rock tests and numerical simulations.The rock mass is artificially made of various proportions of sand,cement and water to control the distinct strength variations at various composite layers separated by parallel bedding planes.All rock specimens are prefabricated in a specially designed mould and then cut into 50 mm in diameter and 50 mm in height for split Hopkinson pressure bar(SHPB)dynamic compression testing.The test results reveal that increasing strain rate causes the increases of peak strength,σ_p,and the corresponding failure strain,ε_p,while the dynamic elastic modulus,E_d,remains almost unchanged.Interestingly,under the same strain rates,Ed of the composite rock specimen is found to decline first and then increase as the dip angle of bedding plane increases.The obtained rock failure patterns due to various dip angles lead to failure modes that could be classified into four categories from our dynamic tests.Also,a series of counterpart numerical simulations has been undertaken,showing that dynamic responses are in good agreement with those obtained from the SHPB tests.The numerical analysis enables us to Iook into the dynamic characteristics of the composite rock mass subjected to a broader range of strain rates and dip angles than these being tested. | Sen Wen Chunshun Zhang Yulin Chang Ping Hu | 2020 | Journal of Rock Mechanics and Geotechnical Engineering2020，12，2： | 13 |
| 18 | Ultrasonography in diagnosing chronic pancreatitis: New aspects显示文摘The course and outcome is poor for most patients with pancreatic diseases.Advances in pancreatic imaging are important in the detection of pancreatic diseases at early stages.Ultrasonography as a diagnostic tool has made,virtually speaking a technical revolution in medical imaging in the new millennium.It has not only become the preferred method for first line imaging,but also,increasingly to clarify the interpretation of other imaging modalities to obtain efficient clinical decision.We review ultrasonography modalities,focusing on advanced pancreatic imaging and its potential to substantially improve diagnosis of pancreatic diseases at earlier stages.In the first section,we describe scanning techniques and examination protocols.Their consequences for image quality and the ability to obtain complete and detailed visualization of the pancreas are discussed.In the second section we outline ultrasonographic characteristics of pancreatic diseases with emphasis on chronic pancreatitis.Finally,new developments in ultrasonography of the pancreas such as contrast enhanced ultrasound and elastography are enlightened. | Georg Dimcevski Friedemann G Erchinger Roald Havre Odd Helge Gilja | 2013 | World Journal of Gastroenterology2013，19，42： | 12 |
| 19 | EFFECT OF EQUAL-CHANNEL ANGULAR PRESSING ON STRUCTURE OF Al ALLOY 2024显示文摘EFFECTOFEQUALCHANNELANGULARPRESSINGONSTRUCTUREOFAlALLOY2024①LiuZuyan,LiangGuoxian,WangErde,WangZhongrenSchoolofMaterialsScie... | Liu, Zuyan Liang, Guoxian Wang, Erde Wang, Zhongren | 1997 | 中国有色金属学会会刊:英文版1997，7，2： | 12 |
| 20 | 云南红豆杉愈伤组织培养及其生产紫杉醇的研究显示文摘云南红豆杉愈伤组织培养及其生产紫杉醇的研究甘烦远彭丽萍郑光植(中国科学院昆明植物研究所昆明650204)从红豆杉科红豆杉属植物如短叶红豆杉(Taxusbrevifolia)等的树皮或枝叶提取到的紫杉醇(Taxol)是一种具有强抗癌活性的二萜烯类化合... | 甘烦远 彭丽萍 郑光植 | 1996 | 生物工程学报1996，12，S1： | 12 |
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