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| 1 | Structural Synthesis of Compliant Metamorphic Mechanisms Based on Adjacency Matrix Operations显示文摘A compliant metamorphic mechanism attributes to a new type of metamorphic mechanisms evolved from rigid metamorphic mechanisms. The structural characteristics and representations of a compliant metamorphic mechanism are different from its rigid counterparts, so does the structural synthesis method. In order to carry out its structural synthesis, a constraint graph representation for topological structure of compliant metamorphic mechanisms is introduced, which can not only represent the structure of a compliant metamorphic mechanism, but also describe the characteristics of its links and kinematic pairs. An adjacency matrix representation of the link relationships in a compliant metamorphic mechanism is presented according to the constraint graph. Then, a method for structural synthesis of compliant metamorphic mechanisms is proposed based on the adjacency matrix operations. The operation rules and the operation procedures of adjacency matrices are described through synthesis of the initial configurations composed of s+1 links from an s-link mechanism (the final configuration). The method is demonstrated by synthesizing all the possible four-link compliant metamorphic mechanisms that can transform into a three-link mechanism through combining two of its links. Sixty-five adjacency matrices are obtained in the synthesis, each of which corresponds to a compliant metamorphic mechanism having four links. Therefore, the effectiveness of the method is validated by a specific compliant metamorphic mechanism corresponding to one of the sixty-five adjacency matrices. The structural synthesis method is put into practice as a fully compliant metamorphic hand is presented based on the synthesis results. The synthesis method has the advantages of simple operation rules, clear geometric meanings, ease of programming with matrix operation, and provides an effective method for structural synthesis of compliant metamorphic mechanisms and can be used in the design of new compliant metamorphic mechanisms. | LI Duanling ZHANG Zhonghai CHEN Guimin | 2011 | Chinese Journal of Mechanical Engineering2011，24，4： | 9 |
| 2 | Recent advances in regional air-sea coupled models显示文摘In this paper,we first briefly review the history of air-sea coupled models,and then introduce the current status and recent advances of regional air-sea coupled models.In particular,we discuss the core technical and scientific issues involved in the development of regional coupled models,including the coupling technique,lateral boundary conditions,the coupling with sea waves(ices),and data assimilation.Furthermore,we introduce the application of regional coupled models in numerical simulation and dynamical downscaling.Finally,we discuss the existing problems and future directions in the development of regional air-sea coupled models. | PENG ShiQiu LIU DuanLing SUN ZhaoBo LI YiNeng | 2012 | Science China Earth Sciences2012，55，9： | 6 |
| 3 | Configuration Analysis of Metamorphic Mechanisms Based on Extended Adjacency Matrix Operations显示文摘The adjacency matrix operations,which connect with configuration transformation correspondingly,can be used for analysis of configuration transformation of metamorphic mechanisms and the corresponding algorithm can easily be simulated by computer.But the adjacency matrix based on monochrome topological graph is not suitable for the topological representation of mechanisms with multiple joints.The method of adjacency matrix operations has its own limitations for analysis of configuration transformation of metamorphic mechanisms because it can only be used in the topological representation of mechanisms with single joints.In order to overcome the drawback of the adjacency matrix,a kind of new matrix named as extended adjacency matrix is proposed to express topological structures of all mechanisms.The extended adjacency matrix is not only suitable for the topological representation of mechanisms with single joints,but also can be used in that of mechanisms with multiple joints.On this basis,a method of matrix operations based on the extended adjacency matrix is proposed to analyze the configuration transformation of metamorphic mechanisms.The method is not only suitable for configuration analysis of metamorphic mechanisms with single joints as well as metamorphic mechanisms with multiple joints.The method is evaluated by calculating two examples representing metamorphic mechanisms with single joint and multiple joints respectively.It can be concluded that the method is effective and correct for analysis of configuration transformation of all metamorphic mechanisms.The proposed method is simple and easy to be achieved by computer programming.It provides a basis for structural synthesis of all metamorphic mechanisms. | LI Duanling ZHANG Zhonghai | 2011 | Chinese Journal of Mechanical Engineering2011，24，5： | 5 |
| 4 | Constraint and Mobility Change Analysis of Rubik’s Cube-inspired Reconfigurable Joints and Corresponding Parallel Mechanisms显示文摘The current research of reconfigurable parallel mechanism mainly focuses on the construction of reconfigurable joints.Compared with the method of changing the mobility by physical locking joints,the geometric constraint has good controllability,and the constructed parallel mechanism has more configurations and wider application range.This paper presents a reconfigurable axis(rA)joint inspired and evolved from Rubik’s Cubes,which have a unique feature of geometric and physical constraint of axes of joint.The effectiveness of the rA joint in the construction of the limb is analyzed,resulting in a change in mobility and topology of the parallel mechanism.The rA joint makes the angle among the three axes inside the groove changed arbitrarily.This change in mobility is completed by the case illustrated by a 3(rA)P(rA)reconfigurable parallel mechanism having variable mobility from 1 to 6 and having various special configurations including pure translations,pure rotations.The underlying principle of the metamorphosis of this rA joint is shown by investigating the dependence of the corresponding screw system comprising of line vectors,leading to evolution of the rA joint from two types of spherical joints to three types of variable Hooke joints and one revolute joint.The reconfigurable parallel mechanism alters its topology by rotating or locking the axis of rA joint to turn all limbs into different phases.The prototype of reconfigurable parallel mechanism is manufactured and all configurations are enumerated to verify the validity of the theoretical method by physical experiments. | Duanling Li Pu Jia Jiazhou Li Dan Zhang Xianwen Kong | 2020 | Chinese Journal of Mechanical Engineering2020，33，5： | 2 |
| 5 | Searching Questions by Identifying Question Topic and Question Focus显示文摘 | Huizhong Duanl Yunbo Cao Chin-Yew Lin etal | 2008 | Proceedings of ACL2008，，8： | 1 |
| 6 | CharacterizationofacylatedpepsinGsolubilizedcollagenwithbettersurfaceactivity显示文摘 | LiC TianH DuanL etal | 2013 | InternationalJournalofBiologicalMacromolecules2013，57，： | 1 |
| 7 | SurfaceactivityofpepsinGsolubilizedcollagenacylated bylauroychloridealongwithsuccinicanhydride显示文摘 | LiC LiuW DuanL etal | 2014 | JournalofAppliedPolymerScience2014，131，40： | 1 |
| 8 | Mobility Analysis of a Complex Structured Ball Based on Mechanism Decomposition and Equivalent Screw 显示文摘 | Dai J S Li Duanling Zhang Qixian | 2004 | Mechanism and Machine Theory2004，39，： | 1 |
| 9 | Mobility analysis of a complex structured ball based on mechanism decomposition and equivalent screw system analysis显示文摘 | Jian S Dai Duanling Li | | 0，，： | 1 |
| 10 | Crystallization of calcium oxalate inliposome solutions of different carboxylates显示文摘 | OUYANG J M DUANL HE J H | 2003 | Chem Lett2003，32，3： | 1 |
| 11 | Design and analysis of a novel hinged boom based on cable drive显示文摘Hinged booms are widely used in astrophysics missions;however,the trajectory and deployment velocity are difficult to control because they are usually driven by springs,which limits their application in narrow spaces.Thus,a novel hinged boom is highly required to achieve motion controllability.Through an equivalent substitution between the cable drive loop and the binary link in topology,a type synthesis method for the cable-driven single-degree-of-freedom chain is proposed based on the single-open-chain(SOC)adding method.According to the configuration design,a novel cable-driven hinged boom is proposed,aiming to achieve boom synchronism.Then,to preload easily,a method that preload is applied and measured at the cable ends is adopted and the relationship between the initial preload and the target preload is deduced.By analyzing the distribution of cable tension,a new stiffness model is proposed thus a stiffness equation is obtained.Finally,the dynamic simulation analysis and zero-gravity deployment experiment of the hinged boom is carried out to verify its reliability.This research provides a new way for the type synthesis of cable-driven single-degree-of-freedom chain and a new model for analyzing cable-driven stiffness.Moreover,the novel cable-driven hinged boom obtained in this study can be well-applied in the field of aerospace. | Kaijie DONG Duanling LI Qiuhong LIN Hui QIU Qiang CONG Xiao LI | 2022 | Chinese Journal of Aeronautics2022，35，3： | 1 |
| 12 | Prelominary study on the anther Culture in Lycium barbarum L显示文摘 | DUANL J | 2008 | Agricultural Science & Technology2008，，5： | 1 |
| 13 | A con- straint graph representation of metamorphic linkages 显示文摘 | Li Duanling Zhang Zhonghai Mccarthy J M | 2011 | Mechanism and Machine Theory2011，46，： | 1 |
| 14 | Mobility analysis of a complex structured ball based on mechanism decomposition and equivalent screw system analysis显示文摘 | Jian S. Dai Duanling Li Qixian Zhang Guoguang Jin | 2004 | Mechanism and Machine Theory2004，，4： | 1 |
| 15 | Controlling Spin Exchange Interactions of Ultracold Atoms in Optical Lattices 显示文摘 | DUANL L M DEMLER E LUKIN M D | 2003 | PhysRevLett2003，91，09： | 1 |
| 16 | Mobility Analysis of a Complex Structured Ball Based on Mechanism Decomposition and Equivalent Screw System Analysis显示文摘 | Dai J S Li Duanling Zhang Qixian | | 0，，04： | 1 |
| 17 | Optimal returns policy for supply chain with e-marketplace显示文摘 | Tsan MC DuanL HouminY | 2004 | International Journal Production Economics2004，88，2： | 1 |
| 18 | Robust model reference control for multivariable linear systems subject to parameter uncertainties 显示文摘 | Duanl G R Liu W Q Liu G P | 2001 | Journal of Systems and Control Engineering2001，215，16： | 1 |
| 19 | Regenerationofherbicideresistanttransgenicriceplantsfollowingmicroprojectilemediatedtransformationofsuspensionculturecells显示文摘 | CaoJ DuanL McelroyD etal | 1992 | PlantCellReports1992，11，11： | 1 |
| 20 | Forward displacement analy-sis of a 3- RPR spherical parallel mechanism显示文摘 | LI Duanling ZHANG Zhonghai LI He | 2013 | Journal of Me-chanical Engineering Science2013，227，8： | 1 |
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