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| 1 | Compact DG modules and Gorenstein DG algebras显示文摘When the base connected cochain DG algebra is cohomologically bounded, it is proved that the difference between the amplitude of a compact DG module and that of the DG algebra is just the projective dimension of that module. This yields the unboundedness of the cohomology of non-trivial regular DG algebras. When A is a regular DG algebra such that H(A) is a Koszul graded algebra, H(A) is proved to have the finite global dimension. And we give an example to illustrate that the global dimension of H(A) may be infinite, if the condition that H(A) is Koszul is weakened to the condition that A is a Koszul DG algebra. For a general regular DG algebra A, we give some equivalent conditions for the Gorensteiness. For a finite connected DG algebra A, we prove that Dc(A) and Dc(Aop) admit Auslander-Reiten triangles if and only if A and Aop are Gorenstein DG algebras. When A is a non-trivial regular DG algebra such that H(A) is locally finite, Dc(A) does not admit Auslander-Reiten triangles. We turn to study the existence of Auslander-Reiten triangles in Dlbf(A) and Dlbf(Aop) instead, when A is a regular DG algebra. | MAO XueFeng WU QuanShui | 2009 | Science China Mathematics2009，52，4： | 10 |
| 2 | Experimental advances in superlubricity显示文摘Superlubricity,or structural lubricity,is a state that has two contacting surfaces exhibiting no resistance to sliding.This effect has been theoretically described to be possible between two completely clean single crystalline solid surfaces.However,experimental observations of superlubricity were limited to nanoscale and under high vacuum or inert gas environments even after twenty years since the concept of superlubricity has been suggested in 1990.In the last two years,remarkable advances have been achieved in experimental observations of superlubricity ranging from micro-scale to centimeters and in ambient environment.This study aims to report a comprehensive understanding of the superlubricity phenomenon. | Quanshui ZHENG Ze LIU | 2014 | Friction2014，2，2： | 7 |
| 3 | INTERACTION MODELS FOR EFFECTIVE THERMAL AND ELECTRIC CONDUCTIVITIES OF CARBON NANOTUBE COMPOSITES显示文摘The present article provides supplementary information of previous works of analytic models for predicting conductivity enhancements of carbon nanotube composites. The models,though fairly simple,are able to take account of the effects of conductivity anisotropy,nonstraightness,and aspect ratio of the CNT additives on the conductivity enhancement of the composite and to give predictions agreeing well with existing experimental data. The omitted detailed derivation of this model is demonstrated in the present article with a more systematical analysis,which may help with further development in this direction. Furthermore,the effects of various orientation distributions of CNTs are reported here for the first time. The information may be useful in design or fabrication technology of CNT composites for better or specified conductivities. | Fei Deng Quanshui Zheng | 2009 | Acta Mechanica Solida Sinica2009，22，1： | 6 |
| 4 | Detection and characterization of diverse alpha-and betacoronaviruses from bats in China显示文摘Bats have been implicated as important reservoir hosts of alpha- and betacoronaviruses. In this study, diverse coronaviruses(CoVs) were detected in 50 of 951(positive rate 5.3%) intestinal specimens of eight bat species collected in four provinces and the Tibet Autonomous Region of China by pan-coronavirus RT-PCR screening. Based on 400-nt RNA-dependent RNA polymerase(Rd RP) sequence analysis, eight belonged to genus Alphacoronavirus and 42 to Betacoronavirus.Among the 50 positive specimens, thirteen gave rise to CoV full-length Rd RP gene amplification for further sequence comparison, of which three divergent sequences(two from a unreported province) were subjected to full genome sequencing. Two complete genomes of betacoronaviruses(JTMC15 and JPDB144) and one nearly-complete genome of alphacoronavirus(JTAC2) were sequenced and their genomic organization predicted. The present study has identified additional numbers of genetically diverse bat-borne coronaviruses with a wide distribution in China. Two new species of bat CoV, identified through sequence comparison and phylogenetic analysis, are proposed. | Lin Xu Fuqiang Zhang Weihong Yang Tinglei Jiang Guanjun Lu Biao He Xingyu Li Tingsong Hu Gang Chen Yun Feng Yuzhen Zhang Quanshui Fan Jiang Feng Hailin Zhang Changchun Tu | 2016 | Virologica Sinica2016，31，1： | 6 |
| 5 | Screen-imaging guidance using a modified portable video macroscope for middle cerebral artery occlusion显示文摘The use of operating microscopes is limited by the focal length.Surgeons using these instruments cannot simultaneously view and access the surgical field and must choose one or the other.The longer focal length (more than 1 000 mm) of an operating telescope permits a position away from the operating field,above the surgeon and out of the field of view.This gives the telescope an advantage over an operating microscope.We developed a telescopic system using screen-imaging guidance and a modified portable video macroscope constructed from a Computar MLH-10 × macro lens,a DFK-21AU04 USB CCD Camera and a Dell laptop computer as monitor screen.This system was used to establish a middle cerebral artery occlusion model in rats.Results showed that magnification of the modified portable video macroscope was appropriate (5-20 ×) even though the Computar MLH-10 × macro lens was placed 800 mm away from the operating field rather than at the specified working distance of 152.4 mm with a zoom of 1-40 ×.The screen-imaging telescopic technique was clear,life-like,stereoscopic and matched the actual operation.Screen-imaging guidance led to an accurate,smooth,minimally invasive and comparatively easy surgical procedure.Success rate of the model establishment evaluated by neurological function using the modified neurological score system was 74.07%.There was no significant difference in model establishment time,sensorimotor deficit and infarct volume percentage.Our findings indicate that the telescopic lens is effective in the screen surgical operation mode referred to as 'long distance observation and short distance operation' and that screen-imaging guidance using an modified portable video macroscope can be utilized for the establishment of a middle cerebral artery occlusion model and micro-neurosurgery. | Xingbao Zhu Junli Luo Yun Liu Guolong Chen Song Liu Qiangjin Ruan Xunding Deng Dianchun Wang Quanshui Fan Xinghua Pan | 2012 | Neural Regeneration Research2012，7，12： | 6 |
| 6 | Temperature and velocity dependent friction of a microscale graphite-DLC heterostructure显示文摘One of the promising approaches to achieving large scale superlubricity is the use of junctions between existing ultra-flat surface together with superlubric graphite mesas.Here we studied the frictional properties of microscale graphite mesa sliding on the diamond-like carbon,a commercially available material with a ultra-flat surface.The interface is composed of a single crystalline graphene and a diamond-like carbon surface with roughness less than I nm.Using an integrated approach,which includes Argon plasma irradiation of diamond-like carbon surfaces,X-ray photoelectron spectroscopy analysis and Langmuir adsorption modeling,we found that while the velocity dependence of friction follows a thermally activated sliding mechanism,its temperature dependence is due to the desorption of chemical groups upon heating.These observations indicate that the edges have a significant contribution to the friction.Our results highlight potential factors affecting this type of emerging friction junctions and provide a novel approach for tuning their friction properties through ion irradiation. | Yujie GONGYANG Wengen OUYANG Cangyu QU Michael URBAKH Baogang QUAN Ming MA Quanshui ZHENG | 2020 | Friction2020，8，2： | 5 |
| 7 | Micro- and nano-mechanics in China: A brief review of recent progress and perspectives显示文摘The past three decades have witnessed the explosion of nanoscience and technology, where notable research efforts have been made in synthesizing nanomaterials and controlling nanostructures of bulk materials. The uncovered mechanical behaviors of structures and materials with reduced sizes and dimensions pose open questions to the community of mechanicians, which expand the framework of continuum mechanics by advancing the theory, as well as modeling and experimental tools. Researchers in China have been actively involved into this exciting area, making remarkable contributions to the understanding of nanoscale mechanical processes, the development of multi-scale, multi-field modeling and experimental techniques to resolve the processing-microstructures-properties relationship of materials, and the interdisciplinary studies that broaden the subjects of mechanics. This article reviews selected progress made by this community, with the aim to clarify the key concepts, methods and applications of micro-and nano-mechanics, and to outline the perspectives in this fast-evolving field. | ZhiPing Xu QuanShui Zheng | 2018 | Science China(Physics,Mechanics & Astronomy)2018，61，7： | 5 |
| 8 | Preparation, characterization and nonlinear optical properties of colloidal gallium arsenide nanocrystals显示文摘GaAs nanocrystals were prepared via a simple mechanical ball milling technique. The prepared GaAs nanocrys- tals have high purity and could form colloidal ethanol suspension without any surfactant additives. The colloidal GaAs nanocrystal suspension displayed excellent two-photon absorption property over the visible and near-infrared region from 490 nm to 1064 nm, which enables it to become a promising broadband optical limiting material. | LIU Zhengang LIU Chunling LI Quanshui CHEN Zhijian GONG Qihuang | 2006 | Rare Metals2006，25，2： | 3 |
| 9 | Experimental and numerical investigation of Weibullian behavior of grain crushing strength显示文摘The Weibullian behavior of single grain crushing strength was investigated experimentally and numerically with the aim of enhancing the understanding of rock grain breakage.The morphologies of pebble grains were obtained using white light 3D laser scanning and image processing.A grain shape library was constructed for grain shape analysis with different shape descriptors.The use of the shape library and grain stability analysis is discussed for a suggested procedure to rotate a grain to its most stable configuration.Single grain crushing tests were performed for 30 pebbles to obtain force-displacement curves and fracture patterns.Each grain was compressed diametrically between flat platens.As expected,the values of the stress at bulk fracture follow a Weibull distribution.A procedure for generating crushable agglomerates with realistic particle shapes was demonstrated,which was accomplished in the discrete element modeling(DEM)of the single grain crushing test.The work presented here is novel in that both the heterogeneous micro-structures and randomly distributed flaws are considered.The DEM results demonstrate that the proposed modeling approach and calibrated parameters are reliable and can reflect the crushing behavior of rock pebbles.Finally,three parametric studies were presented evaluating the effects of micro-crack density,micro-crack disorder,and grain morphology on the Weibullian behavior of the crushing strength,none of which has previously been thoroughly considered.These three studies provide a deeper insight into the origin of the Weibullian behavior of single grain crushing strength. | Quanshui Huang Wei Zhou Gang Ma Tang-Tat Ng Kun Xu | 2020 | Geoscience Frontiers2020，11，2： | 3 |
| 10 | Koszul differential graded modules显示文摘The concept of Koszulity for differential graded (DG, for short) modules is introduced. It is shown that any bounded below DG module with bounded Ext-group to the trivial module over a Koszul DG algebra has a Koszul DG submodule (up to a shift and truncation), moreover such a DG module can be approximated by Koszul DG modules (Theorem 3.6). Let A be a Koszul DG algebra, and Dc(A) be the full triangulated subcategory of the derived category of DG A-modules generated by the object AA. If the trivial DG module kA lies in Dc(A), then the heart of the standard t-structure on Dc(A) is anti-equivalent to the category of finitely generated modules over some finite dimensional algebra. As a corollary, Dc(A) is equivalent to the bounded derived category of its heart as triangulated categories. | HE JiWei WU QuanShui | 2009 | Science China Mathematics2009，52，9： | 3 |
| 11 | Suspended penetration wetting state of droplets on microstructured surfaces显示文摘When a water droplet on a micropillar-structured hydrophobic surface is submitted to gradually increased pressure, the CassieBaxter wetting state transforms into the Wenzel wetting state once the pressure exceeds a critical value. It has been assumed that the reverse transition(Wenzel-to-Cassie-Baxter wetting state) cannot happen spontaneously after the pressure has been removed.In this paper, we report a new wetting-state transition. When external pressure is exerted on a droplet in the Cassie-Baxter wetting state on textured surfaces with high micropillars to trigger the breakdown of this wetting state, the droplet penetrates the micropillars but does not touch the base of the surface to trigger the occurrence of the Wenzel wetting state. We have named this state the suspended penetration wetting state. Spontaneous recovery from the suspended penetration wetting state to the initial Cassie-Baxter wetting state is achieved when the pressure is removed. Based on the experimental results, we built models to establish the penetration depth that the suspended penetration wetting state could achieve and to understand the energy barrier that influences the equilibrium position of the liquid surface. These results deepen our understanding of wetting states on rough surfaces subjected to external disturbances and shed new light on the design of superhydrophobic materials with a robust wetting stability. | Jing Lou SongLin Shi Chen Ma CunJing Lv QuanShui Zheng | 2021 | Science China(Physics,Mechanics & Astronomy)2021，64，4： | 2 |
| 12 | On symmet ric boolean functions with high algebraic immunity on even number of variables显示文摘 | PENG Jie WU Quanshui KAN Haibin | 2011 | IEEE Transations on In- formation Theory2011，57，10： | 1 |
| 13 | Koszul Differential Graded Algebras and BGG Correspondence II显示文摘The concept of Koszul differential graded (DG for short) algebra is introduced in [8].Let A be a Koszul DG algebra.If the Ext-algebra of A is finite-dimensional,i.e.,the trivial module A k is a compact object in the derived category of DG A-modules,then it is shown in [8] that A has many nice properties.However,if the Ext-algebra is infinitedimensional,little is known about A.As shown in [15] (see also Proposition 2.2),A k is not compact if H(A) is finite-dimensional.In this paper,it is proved that the Koszul duality theorem also holds when H(A) is finite-dimensional by using Foxby duality.A DG version of the BGG correspondence is deduced from the Koszul duality theorem. | Jiwei HE Quanshui WU | 2010 | Chinese Annals of Mathematics,Series B2010，31，1： | 1 |
| 14 | One-Pot Synthesis of Uniform Cu2O and CuS Hollow Spheres and Their Optical Limiting Properties显示文摘 | Gao Jining Li Quanshui Zhao Huabo | 2008 | Chemistry of Materials2008，20，19： | 1 |
| 15 | Sliding of Water Droplets on Microstructured Hydrophobic Sur-faces显示文摘 | Cunjing Lv Quanshui Zheng | | 0，，26： | 1 |
| 16 | Occlusion of the middle cerebral artery Guidance by screen imaging using an EDA-H portable medium-soft electronic endoscope显示文摘The present study aimed to verify the practicability of performing screen-based surgical operations under the guidance of a real-time viewing and recording system (RTVRS) using a portable medium-soft electronic endoscope (pmsEE).The middle cerebral artery in rats was occluded under screen-imaging guidance using a pmsEE RTVRS to reproduce an animal model of human cerebral infarction.The screen imaging of the pmsEE RTVRS was clear,life-like,stereoscopic and synchronous with the actual operation.Screen-imaging guidance led to an accurate,smooth,minimally invasive and comparatively easy surgical procedure.The surgical success rate,time of model establishment,neurological function scores,and infarct volume were similar to those using an operating microscope.These results indicate that the self-designed pmsEE RTVRS could be utilized for portable endoscopic screen-based surgical operations. | Xingbao Zhu Junli Luo Song Liu Dongping Li Min Li Quanshui Fan | 2011 | Neural Regeneration Research2011，6，23： | 1 |
| 17 | Co-Poisson structures on polynomial Hopf algebras显示文摘The Hopf dual H~? of any Poisson Hopf algebra H is proved to be a co-Poisson Hopf algebra provided H is noetherian. Without noetherian assumption, unlike it is claimed in literature, the statement does not hold. It is proved that there is no nontrivial Poisson Hopf structure on the universal enveloping algebra of a non-abelian Lie algebra. So the polynomial Hopf algebra, viewed as the universal enveloping algebra of a finite-dimensional abelian Lie algebra, is considered. The Poisson Hopf structures on polynomial Hopf algebras are exactly linear Poisson structures. The co-Poisson structures on polynomial Hopf algebras are characterized.Some correspondences between co-Poisson and Poisson structures are also established. | Qi Lou Quanshui Wu | 2018 | Science China Mathematics2018，61，5： | 1 |
| 18 | Determination of volumetric elastic moduli of plant leaf cells based on pressure-volume curves显示文摘Volumetric elastic modulus(VEM) is an important parameter in biophysics and biomechanics of plants for in particular understanding cell growth.This paper proposes a new relation that can be used for precisely determining VEM.With the aid of this relation,it shows that the exponential approximation of the pressure-volume relationship adopted in most of the literatures in this field may lead to serious errors on VEM. | Yanxiang Zhang Quanshui Zheng | 2012 | Theoretical & Applied Mechanics Letters2012，2，1： | 1 |
| 19 | Elementary building blocks of graphene-nanoribbon-based electronic devices显示文摘 | Xu Zhiping Zheng Quanshui Chen Guanhua | 2007 | Appl Phys Lett2007，90，22： | 1 |
| 20 | L-estimatton for linear heteroscedastic models显示文摘 | Roger Koenker Quanshui Zhao | 1994 | Journal of Nonparametric Statistics (-)1994，，3： | 1 |
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