In order to solve the problem which may be generated in the case of manual replacement of the belt conveyor sealing leather, such as the operation space is small, the work efficiency is low and the finger is easy to b...In order to solve the problem which may be generated in the case of manual replacement of the belt conveyor sealing leather, such as the operation space is small, the work efficiency is low and the finger is easy to be scratched, Using the principle of simulated bionics, through theoretical analysis and experimental verification,a tool was designed to replace the belt conveyor sealing leather. The tool includes a limit device, feeding device,U-shaped handle three parts, suitable for the replacement of various types and sizes of belt conveyor sealing leather. Use this tool to replace the belt conveyor sealing leather, the results show that： 1） The effect of replace belt conveyor sealing leather is good, belt conveyor sealing leather flat and solid. 2） The replacement proces saveraged 1. 77 min, shorter than the original method of more than 8 min. 3） Direct contact of the fingers and the metal baffle edge was avoided, so as to reduce the chances of a finger injury.展开更多
The bionic consciousness,idea,and practice opened a unique path for the progress of mankind,the development of the society,and the innovation of science and technology from the subconscious bionic activities of the an...The bionic consciousness,idea,and practice opened a unique path for the progress of mankind,the development of the society,and the innovation of science and technology from the subconscious bionic activities of the ancient humans to the significant bionic designs in modern engineering.Nowadays,driven by the practical demand of human beings,bionics becomes an important factor for the sustainable development of technology.A lot of new and outstanding innovations have been produced through the effective interactions between bionics,technology,and demand.The stronger the interactions,the greater the innovation success would be.In this article,the basic factors such as the connotation,characteristics,and interactions of bionic demands,bionic models,bionic simulations,and bionic products were explained,which are the indispensable basic knowledge for improving the ability of innovation especially for the original one,realizing the design and innovation of new technology and manufacturing for better bionic products.展开更多
Bioactive ceramics have been used in bone tissue repair and regeneration.However,because of the complex in vivo osteogenesis process,long cycle,and difficulty of accurately tracking,the mechanism of interaction betwee...Bioactive ceramics have been used in bone tissue repair and regeneration.However,because of the complex in vivo osteogenesis process,long cycle,and difficulty of accurately tracking,the mechanism of interaction between materials and cells has yet to be fully understood,hindering its development.The ceramic microbridge micro-fluidic chip system may solve the problem and provide an in vitro method to simulate the microenvironment in vivo.Nevertheless,the complex microenvironment parameters of the chip system need to be studied in detail.Computer simulation bionics can provide clues for the setting of microenvironment parameters.This study used a computational bionic model to simulate the bone growth process in the presence of immune-related factors.The osteoblast differentiation of mesenchymal stem cells of calcium phosphate ceramics in a macrophage-dominated immune microenvironment was studied using a microfluidic chip system.The computational biomimetic model and microfluidic chip findings were basically consistent with the reported results of the animal experiments.These findings suggest that studying the osteogenic behavior of calcium phosphate ceramics using a microfluidic chip model is feasible.The method model provided in this study can be extended to other biomaterials,providing a viable path for their research and evaluation.展开更多
In the last decades, surface drag reduction has been re-emphasized because of its practical values in engineering applications,including vehicles, aircrafts, ships, and fuel pipelines. The bionic study of drag reducti...In the last decades, surface drag reduction has been re-emphasized because of its practical values in engineering applications,including vehicles, aircrafts, ships, and fuel pipelines. The bionic study of drag reduction has been attracting scholars' attentions. Here, it was determined that the delicate microstructures on the scales of the fish Ctenopharyngodon idellus exhibit remarkable drag-reduction effect. In addition, the underlying drag-reduction mechanism was carefully investigated. First,exceptional morphologies and structures of the scales were observed and measured using a scanning electron microscope and3-dimensional(3D) microscope. Then, based on the acquired data, optimized 3D models were created. Next, the mechanism of the water-trapping effect of these structures was analyzed through numerical simulations and theoretical calculations. It was determined that there are many microcrescent units with certain distributions on its surface. In fact, these crescents are effective in generating the "water-trapping" effect and forming a fluid-lubrication film, thus reducing the skin friction drag effectively.Contrasting to a smooth surface, the dynamics finite-element analysis indicated that the maximum drag-reduction rate of a bionic surface is 3.014% at 0.66 m/s flow rate. This study can be used as a reference for an in-depth analysis on the bionic drag reduction of boats, underwater vehicles, and so forth.展开更多
文摘In order to solve the problem which may be generated in the case of manual replacement of the belt conveyor sealing leather, such as the operation space is small, the work efficiency is low and the finger is easy to be scratched, Using the principle of simulated bionics, through theoretical analysis and experimental verification,a tool was designed to replace the belt conveyor sealing leather. The tool includes a limit device, feeding device,U-shaped handle three parts, suitable for the replacement of various types and sizes of belt conveyor sealing leather. Use this tool to replace the belt conveyor sealing leather, the results show that： 1） The effect of replace belt conveyor sealing leather is good, belt conveyor sealing leather flat and solid. 2） The replacement proces saveraged 1. 77 min, shorter than the original method of more than 8 min. 3） Direct contact of the fingers and the metal baffle edge was avoided, so as to reduce the chances of a finger injury.
基金supported by the Cooperative Innovation Platform of National Oil Shale Exploration Development and Research,the National Natural Science Foundation for Youths(Grant Nos.51205160 and 51375006)the Specialized Research Fund for the Doctoral Program of Higher Education of China(Grant No.20120061120110)
文摘The bionic consciousness,idea,and practice opened a unique path for the progress of mankind,the development of the society,and the innovation of science and technology from the subconscious bionic activities of the ancient humans to the significant bionic designs in modern engineering.Nowadays,driven by the practical demand of human beings,bionics becomes an important factor for the sustainable development of technology.A lot of new and outstanding innovations have been produced through the effective interactions between bionics,technology,and demand.The stronger the interactions,the greater the innovation success would be.In this article,the basic factors such as the connotation,characteristics,and interactions of bionic demands,bionic models,bionic simulations,and bionic products were explained,which are the indispensable basic knowledge for improving the ability of innovation especially for the original one,realizing the design and innovation of new technology and manufacturing for better bionic products.
基金supported by the National key research and development programs of China:2022YFC2405800Beijing Natural Science Foundation:L234022supported by China NMPA Research on performance and safety evaluation of innovative biomaterial medical devices:RS2024X004.
文摘Bioactive ceramics have been used in bone tissue repair and regeneration.However,because of the complex in vivo osteogenesis process,long cycle,and difficulty of accurately tracking,the mechanism of interaction between materials and cells has yet to be fully understood,hindering its development.The ceramic microbridge micro-fluidic chip system may solve the problem and provide an in vitro method to simulate the microenvironment in vivo.Nevertheless,the complex microenvironment parameters of the chip system need to be studied in detail.Computer simulation bionics can provide clues for the setting of microenvironment parameters.This study used a computational bionic model to simulate the bone growth process in the presence of immune-related factors.The osteoblast differentiation of mesenchymal stem cells of calcium phosphate ceramics in a macrophage-dominated immune microenvironment was studied using a microfluidic chip system.The computational biomimetic model and microfluidic chip findings were basically consistent with the reported results of the animal experiments.These findings suggest that studying the osteogenic behavior of calcium phosphate ceramics using a microfluidic chip model is feasible.The method model provided in this study can be extended to other biomaterials,providing a viable path for their research and evaluation.
基金supported by the National Natural Science Foundation of China(Grant Nos.51305282,51505183&51325501)Program for Excellent Talents of Liaoning Provincial Committee of Education(Grant No.LJQ2014071)
文摘In the last decades, surface drag reduction has been re-emphasized because of its practical values in engineering applications,including vehicles, aircrafts, ships, and fuel pipelines. The bionic study of drag reduction has been attracting scholars' attentions. Here, it was determined that the delicate microstructures on the scales of the fish Ctenopharyngodon idellus exhibit remarkable drag-reduction effect. In addition, the underlying drag-reduction mechanism was carefully investigated. First,exceptional morphologies and structures of the scales were observed and measured using a scanning electron microscope and3-dimensional(3D) microscope. Then, based on the acquired data, optimized 3D models were created. Next, the mechanism of the water-trapping effect of these structures was analyzed through numerical simulations and theoretical calculations. It was determined that there are many microcrescent units with certain distributions on its surface. In fact, these crescents are effective in generating the "water-trapping" effect and forming a fluid-lubrication film, thus reducing the skin friction drag effectively.Contrasting to a smooth surface, the dynamics finite-element analysis indicated that the maximum drag-reduction rate of a bionic surface is 3.014% at 0.66 m/s flow rate. This study can be used as a reference for an in-depth analysis on the bionic drag reduction of boats, underwater vehicles, and so forth.
