Three dimensional models of shaft were completed on CATIA Part Design module with the Chinese national standard （GB） process structures such as chamfers, threads and tool withdrawal grooves, center holes, flat/woodr...Three dimensional models of shaft were completed on CATIA Part Design module with the Chinese national standard （GB） process structures such as chamfers, threads and tool withdrawal grooves, center holes, flat/woodruff/gib head taper keyseats, grinding undercuts, straight-sidedsplines, circlip slots and collars. The modeling steps are arranged in dialog menu interface by VB 6.0, the shaft creator, that permits users input geometric feature based parameters explicitly, and the standardized processdata are reorganized in Excel files that can be invoked correspondingly in the modeling procedure. It is aimed that this process may supply a simple way for shaft rapid modeling and comprehensive discipline for engineering students in their professional design activities.展开更多
To make inorganic structure data more useful for further studies a five-point list of simple procedures to be followed by authors of crystal structure papers is proposed. 1. A crystal structure should be described wit...To make inorganic structure data more useful for further studies a five-point list of simple procedures to be followed by authors of crystal structure papers is proposed. 1. A crystal structure should be described with the space group corresponding to its true symmetry. 2. A new structure proposal should be tested, if it is realistic in principle. 3. A structure should be described with a space group in a setting given in the International Tables. 4. For a comparison with other structures the structure data should be standardized with the program STRUCTURE TIDY. 5. 揘ew?structure data should be checked in the databases, Chemical Abstracts or on-line internet resources, if they are really new. The list is supplemented with many explanations, commentaries, examples and references.展开更多
The deposition characteristics of nasal formulations directly determine the efficacy of the drugs,whilst the complexity of human nasal airway structure encumbers quantitative evaluation of nasal spatial deposition.Mal...The deposition characteristics of nasal formulations directly determine the efficacy of the drugs,whilst the complexity of human nasal airway structure encumbers quantitative evaluation of nasal spatial deposition.Male and female standard nasal airway structure models were calculated from computed tomography data of 128 Chinese Han nationality using statistical shape model.The deposition evaluation devices were further designed,and an imaging method was then employed to obtain drug deposition information.Furthermore,drug spatial deposition atlases were proposed by UV unwrapping,a mathematical mapping procedure flattening three-dimensional(3D)information to two-dimension bidirectionally,to achieve quantification of drug deposition fractions in the regions of interest.Moreover,the feasibility and universality of this method were verified by correlating it with the chemical quantitative results and computational fluid dynamic simulation of drug deposition of mometasone furoate nasal spray and hydroxypropyl methylcellulose nasal powder,respectively.Finally,the unique drug spatial deposition atlases of these two formulations in the male and female evaluation devices were generated,respectively.In summary,the standard nasal airway structure models of the Chinese Han nationality and the drug spatial deposition atlases provide scientific tools for the formulation optimization and quality control of nasal formulations.展开更多
In this paper,molecular dynamics simulation was applied to synthesize a layered structural color from Konjac glucomannan（KGM） and the effect of particle diameter and temperature were investigated. A series of method...In this paper,molecular dynamics simulation was applied to synthesize a layered structural color from Konjac glucomannan（KGM） and the effect of particle diameter and temperature were investigated. A series of methods such as high voltage electric field treatment,the transfer matrix method and the CIE standard colorimetric system were simulated to obtain the chromaticity coordinates and to analyze the color changes of KGM particles. The results revealed that as the particle diameter increases,the structural color of KGM particles deflects towards the yellow wavelength within the visible spectrum; and as the reaction temperature rises,the structural color deflects towards the blue and violet wavelengths within the visible spectrum.展开更多
文摘Three dimensional models of shaft were completed on CATIA Part Design module with the Chinese national standard （GB） process structures such as chamfers, threads and tool withdrawal grooves, center holes, flat/woodruff/gib head taper keyseats, grinding undercuts, straight-sidedsplines, circlip slots and collars. The modeling steps are arranged in dialog menu interface by VB 6.0, the shaft creator, that permits users input geometric feature based parameters explicitly, and the standardized processdata are reorganized in Excel files that can be invoked correspondingly in the modeling procedure. It is aimed that this process may supply a simple way for shaft rapid modeling and comprehensive discipline for engineering students in their professional design activities.
文摘To make inorganic structure data more useful for further studies a five-point list of simple procedures to be followed by authors of crystal structure papers is proposed. 1. A crystal structure should be described with the space group corresponding to its true symmetry. 2. A new structure proposal should be tested, if it is realistic in principle. 3. A structure should be described with a space group in a setting given in the International Tables. 4. For a comparison with other structures the structure data should be standardized with the program STRUCTURE TIDY. 5. 揘ew?structure data should be checked in the databases, Chemical Abstracts or on-line internet resources, if they are really new. The list is supplemented with many explanations, commentaries, examples and references.
基金funded by the National Natural Science Foundation of China(No.82273863).
文摘The deposition characteristics of nasal formulations directly determine the efficacy of the drugs,whilst the complexity of human nasal airway structure encumbers quantitative evaluation of nasal spatial deposition.Male and female standard nasal airway structure models were calculated from computed tomography data of 128 Chinese Han nationality using statistical shape model.The deposition evaluation devices were further designed,and an imaging method was then employed to obtain drug deposition information.Furthermore,drug spatial deposition atlases were proposed by UV unwrapping,a mathematical mapping procedure flattening three-dimensional(3D)information to two-dimension bidirectionally,to achieve quantification of drug deposition fractions in the regions of interest.Moreover,the feasibility and universality of this method were verified by correlating it with the chemical quantitative results and computational fluid dynamic simulation of drug deposition of mometasone furoate nasal spray and hydroxypropyl methylcellulose nasal powder,respectively.Finally,the unique drug spatial deposition atlases of these two formulations in the male and female evaluation devices were generated,respectively.In summary,the standard nasal airway structure models of the Chinese Han nationality and the drug spatial deposition atlases provide scientific tools for the formulation optimization and quality control of nasal formulations.
基金supported by the National Natural Science Foundation of China(31271837 and 31471704)the major project of Fujian Industry-Academy-Research Cooperation(2013N5003)+1 种基金the Natural Science Foundation(2011J0101)of Fujian Province,the Science and Technology Program under Fujian Provincial Department of Education(JA13439 and JA13440)the Science and Technology Program under Fujian Provincial Department of Forestry(20135)
文摘In this paper,molecular dynamics simulation was applied to synthesize a layered structural color from Konjac glucomannan（KGM） and the effect of particle diameter and temperature were investigated. A series of methods such as high voltage electric field treatment,the transfer matrix method and the CIE standard colorimetric system were simulated to obtain the chromaticity coordinates and to analyze the color changes of KGM particles. The results revealed that as the particle diameter increases,the structural color of KGM particles deflects towards the yellow wavelength within the visible spectrum; and as the reaction temperature rises,the structural color deflects towards the blue and violet wavelengths within the visible spectrum.
