Article
Engineering, Mechanical
Liang Sun, Xuewen Huang, Guanghui Zheng, Zhizheng Ye, Bingliang Ye, Chuanyu Wu
Summary: This paper proposes a rigid sub-chain identification method based on the disassembly and replacement of the branch chain, aiming to eliminate the non-rigid sub-chain part in the kinematic chain (KC) and highlight the rigid sub-chain part. The method is used to identify a non-isomorphic KC atlas and obtain a complete set of planar non-fractionated KCs with simple joints within six loops and 3-DOFs.
MECHANISM AND MACHINE THEORY
(2023)
Article
Engineering, Mechanical
Wenxu Fu, Wei Sun, Shijie Wang, Yiyun Ma, Haochun Duan, Jianyi Kong
Summary: This paper proposes a new method for identifying and eliminating rigid sub-chains in kinematic chains with multiple joints. By introducing the properties of the mesh loop set and independent loop set in loop combination, the existence of a rigid sub-chain can be verified. The representation methods and properties of the joint-joint adjacent matrix and loop matrix are explained, and a method of obtaining some loop matrices by joint-joint adjacency matrix is proposed. By using the operation method of the loop matrix, the DOF of all independent loop sets and the combined loops of independent loop sets can be obtained to identify and eliminate the rigid sub-chain.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2023)
Article
Engineering, Mechanical
Bo Hu, Peng Bai
Summary: This paper presents a systematic approach for the type synthesis of serial kinematic chains (SKCs) with screw type terminal constraints. The principle and steps for synthesizing SKCs based on an adding joint method are proposed, combining screw theory and the atlas method. Feasible SKCs with various terminal constraints are obtained, and examples of constructing novel parallel mechanisms (PMs) using the derived SKCs are given.
MECHANISM AND MACHINE THEORY
(2023)
Article
Computer Science, Artificial Intelligence
Luchuan Yu, Chenxu Cai, Jianhua Zhang, Qinhe Zhang
Summary: Isomorphism identification is important in structural and innovative design. A new method based on adjacency matrix and loop theory is proposed in this paper to identify isomorphic kinematic chains, enriching loop-based theory application. The proposed method is applicable to topology graphs and kinematic chains with one or multiple joints, confirmed correctly without counterexamples, laying a foundation for future structural synthesis.
Article
Engineering, Mechanical
Liang Sun, Zhizheng Ye, Rongjiang Cui, Xuewen Huang, Chuanyu Wu
Summary: A novel method is proposed in this paper to eliminate isomorphism identification and improve synthesis efficiency for planar nonfractionated kinematic chain (KCs) through vertex insertion in contracted graphs. The method divides similar edges into groups based on characteristic matrices calculation, and distinguishes edge types depending on the occurrence of isomerism after inserting vertices. The method is validated by a comparative analysis with other literature results, showing its accuracy and efficiency.
MECHANISM AND MACHINE THEORY
(2022)
Article
Mechanics
Luchuan Yu, Hongbin Wang, Shunqing Zhou
Summary: Structural synthesis plays an important role in the conceptual design of mechanisms. This study introduces a new form of adjacency matrix to illustrate planar kinematic chains and proposes a computer-aided digitization method for synthesizing the whole family of planar non-fractioned kinematic chains. Experimental results confirm the feasibility of the proposed method.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2023)
Article
Chemistry, Multidisciplinary
Bipul Biswas, Debarshi Mitra, Fayis Kp, Suresh Bhat, Apratim Chatterji, Guruswamy Kumaraswamy
Summary: The study demonstrates that isotropic interparticle attraction can drive colloidal chains with a critical level of backbone rigidity to self-assemble into helical structures. The temperature influences the chain morphology and structure significantly.
Article
Mathematics
Petr Gregor, Sven Jaeger, Torsten Muetze, Joe Sawada, Kaja Wille
Summary: The study focuses on constructing cyclic listings of bitstrings with different Hamming weights by flipping a single bit in each step. It generalizes some common problems to a more general case, providing solutions for specific instances and a relaxed version. The proofs involve lexical matchings and symmetric chain decompositions of hypercubes.
JOURNAL OF COMBINATORIAL THEORY SERIES B
(2022)
Article
Cell Biology
Markus Mukenhirn, Francesco Muraca, Delia Bucher, Edgar Asberger, Elisa Cappio Barazzone, Elisabetta Ada Cavalcanti-Adam, Steeve Boulant
Summary: This study confirms that simultaneous deletion of CLCA/B leads to abnormal actin structures at the ventral plasma membrane, described for the first time as functional invadopodia. The formation of these invadopodia is influenced by the proteolytic activity of MMP14, and can be regulated by controlling the delivery of MMP14 to the plasma membrane.
Article
Engineering, Industrial
Andre Felipe Henriques Librantz, Ivanir Costa, Mauro de Mesquita Spinola, Geraldo Cardoso de Oliveira Neto, Leandro Zerbinatti
Summary: The study uses Bayesian belief networks combined with the analytic hierarchy process and noisy-OR techniques to evaluate primary risks in the software supply chain, reducing the number of queries required of decision makers. By ranking software suppliers based on risk level, decision makers can select a low-risk supplier and gain a better understanding of risk factors in the SSC.
INTERNATIONAL JOURNAL OF PRODUCTION RESEARCH
(2021)
Article
Multidisciplinary Sciences
Alin-Florentin Stan, Nicolae Pandrea, Nicolae-Doru Stanescu, Ligia Munteanu, Veturia Chiroiu
Summary: This paper discusses two situations and uses screw coordinates for calculations. The rigidity matrix and eigenpulsations of free vibrations for a rigid solid are determined. The theory for forced vibrations of the system is developed and a numerical application is considered.
Article
Chemistry, Physical
Mohammad Khear Sabra, Fatemh Maksoud
Summary: The study focused on cis boron hydrogen chains, investigating the ground-state energies, binding energies, Mulliken population, and optimal geometrical configurations in relation to chain size n. It was found that the chain dimerization process led to two phases - cis-transoid and trans-cisoid - with corresponding energy gaps around 0.12 eV and 0.11 eV, respectively, as determined by a modified Su-Schrieffer-Heeger (SSH) model.
CHEMICAL PHYSICS LETTERS
(2021)
Article
Chemistry, Inorganic & Nuclear
Zhong-Xuan Xu, Ming-Feng Shi, Li-Feng Li, Jiang-Hong Gu
Summary: In this study, two homochiral metal-organic framework (HMOF) complexes were successfully constructed by using rigid ligands and corresponding metal ions. The chiral nature of these complexes was confirmed through solid CD spectra and crystal X-ray diffraction.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Agricultural Engineering
Chengdeng Chi, Xu Guo, Youcai Zhou, Bilian Chen, Yongjin He
Summary: This study successfully isolated long branch-chains of amylopectin through the combination treatments of preheating, pullulanase digestion, and centrifugation, which can be used for large-scale production. The increase in preheating temperature promoted starch gelatinization and pullulanase digestion, resulting in the increase of long branch-chains of amylopectin content in the collected starch.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Article
Chemistry, Multidisciplinary
Yu Cheng, Xiaowei Liu, Yaqing Guo, Guangyao Dong, Xinkuan Hu, Hong Zhang, Xidan Xiao, Qin Liu, Lin Xu, Liqiang Mai
Summary: This study proposes a new strategy to enhance Li+ transport by eliminating Li+ non-conductive areas and optimizing Li+ pathways through the construction of fully active Li+ conductive networks. The 3D networks formed by the monodispersed cluster chains provide homogeneous, large-scale, continuous Li+ fast transport channels, resulting in high ionic conductivity and Li+ transference number. In addition, the assembled LiFePO4/Li cell exhibits excellent cycling stability.
ADVANCED MATERIALS
(2023)