摘要 :
A brief review of works on the crystal chemical features of the structure and methods of describing crystal structure types is presented. A variant of the universal system of a symbolic description of crystal structure types and m...
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A brief review of works on the crystal chemical features of the structure and methods of describing crystal structure types is presented. A variant of the universal system of a symbolic description of crystal structure types and modular structures with the use of structure codes is proposed. The structure code is based on a description of the geometry and topology of the basic structure module. Structure codes are intended for the identification and systematization of the structure types of compounds, the formalization of topological structural transformations, the determination of structural modules, and the derivation of genetic relationships between the structures.
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摘要 :
X-ray diffraction analysis was used to study the martensite structure of the Ni~(47)Mn~(42)In~(11)alloy. This study shows that the martensitic transformation in the alloy occurs with the formation of modulated martensite. Using a ...
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X-ray diffraction analysis was used to study the martensite structure of the Ni~(47)Mn~(42)In~(11)alloy. This study shows that the martensitic transformation in the alloy occurs with the formation of modulated martensite. Using a new cell prototype, this work determined the parameters of basic cell of the modulated martensite structure and the modulation direction and lattice-modulation period. Orientation relationships between the high-temperature austenite and martensite structures were also determined. A comparative analysis of the new and previous results was performed. The new basic cell indicates the martensite crystal symmetry.
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Serial robots are the most used today and among them, the most common is the basic 3R module, the module that is developed in the vast majority of anthropomorphic serial industrial robots, which today occupies at least 80-90% of t...
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Serial robots are the most used today and among them, the most common is the basic 3R module, the module that is developed in the vast majority of anthropomorphic serial industrial robots, which today occupies at least 80-90% of the total industrial robots existing worldwide. One studied the kinematics and the forces in this module in other works, with an emphasis on the inverse kinematics, so that in this paper the authors will deal with the dynamic functioning of this 3R structure, a basic structure as it could be observed, because the dynamics which represent in fact the actual operation of the entire robotic structure is, therefore, the most important in operation, both for the optimal analysis or design of the robotic structure, as well as for its implementation or maintenance throughout its life. The paper presents the real dynamic functioning of the 3R structure, the related calculation relationships and the diagrams with the simulation of the real dynamic functioning of the 3R platform.
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摘要 :
Serial robots are the most used today and among them, the most common is the basic 3R module, the module that is developed in the vast majority of anthropomorphic serial industrial robots, which today occupies at least 80-90% of t...
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Serial robots are the most used today and among them, the most common is the basic 3R module, the module that is developed in the vast majority of anthropomorphic serial industrial robots, which today occupies at least 80-90% of the total industrial robots existing worldwide. One studied the kinematics and the forces in this module in other works, with an emphasis on the inverse kinematics, so that in this paper the authors will deal with the dynamic functioning of this 3R structure, a basic structure as it could be observed, because the dynamics which represent in fact the actual operation of the entire robotic structure is, therefore, the most important in operation, both for the optimal analysis or design of the robotic structure, as well as for its implementation or maintenance throughout its life. The paper presents the real dynamic functioning of the 3R structure, the related calculation relationships and the diagrams with the simulation of the real dynamic functioning of the 3R platform.
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