Belt conveyor is a kind of important equipment for transporting coal mines, and is also a facility for connecting various processes. It plays a vital role in the supply of raw materials. At present, people have used b...Belt conveyor is a kind of important equipment for transporting coal mines, and is also a facility for connecting various processes. It plays a vital role in the supply of raw materials. At present, people have used belt conveyors in the mining, production, transportation and processing processes of coal mines. It not only has a large transportation volume, but also can be applied in complex working environments. The equipment has a strong carrying capacity and supports transportation by the Bureau of Parks and Roads. This paper gives an overview and analysis of the material blocking protection device of belt conveyor, looking for a proximity switch, combining with the problems encountered in the test, and based on the working principle of belt conveyor, puts forward effective improvement measures of the device, increasing the weight of the detection door in the transformation, and improving the use efficiency.展开更多
DNA has gained great attention because of its unique structure,excellent molecular recognition property,and biological functions.When married with versatile synthetic polymers,the DNA conjugated polymer hybrids,known ...DNA has gained great attention because of its unique structure,excellent molecular recognition property,and biological functions.When married with versatile synthetic polymers,the DNA conjugated polymer hybrids,known as DNA block copolymers（DBCs）,have been launched and well developed for the syntheses of new materials and nanostructures with different functions in the past several decades.Compared to conventional synthetic block copolymers,using DNA as a building block provides several advantages over other polymer candidates,such as molecular recognition,programmable self-assembly,biocompatibility,and sequence-encoded information.In this review,recent developments in this area will be summarized and meaningful breakthroughs will be highlighted.We will discuss representative examples of recent progress in the syntheses,structure manipulations,and applications of DBCs.展开更多
文摘Belt conveyor is a kind of important equipment for transporting coal mines, and is also a facility for connecting various processes. It plays a vital role in the supply of raw materials. At present, people have used belt conveyors in the mining, production, transportation and processing processes of coal mines. It not only has a large transportation volume, but also can be applied in complex working environments. The equipment has a strong carrying capacity and supports transportation by the Bureau of Parks and Roads. This paper gives an overview and analysis of the material blocking protection device of belt conveyor, looking for a proximity switch, combining with the problems encountered in the test, and based on the working principle of belt conveyor, puts forward effective improvement measures of the device, increasing the weight of the detection door in the transformation, and improving the use efficiency.
基金financially supported by the National Natural Science Foundation of China(Nos.21504053,21661162001,21673139,51690151,51473093)the Program of Shanghai Medical Professionals Across Subject Funds(No.YG2016MS74)
文摘DNA has gained great attention because of its unique structure,excellent molecular recognition property,and biological functions.When married with versatile synthetic polymers,the DNA conjugated polymer hybrids,known as DNA block copolymers（DBCs）,have been launched and well developed for the syntheses of new materials and nanostructures with different functions in the past several decades.Compared to conventional synthetic block copolymers,using DNA as a building block provides several advantages over other polymer candidates,such as molecular recognition,programmable self-assembly,biocompatibility,and sequence-encoded information.In this review,recent developments in this area will be summarized and meaningful breakthroughs will be highlighted.We will discuss representative examples of recent progress in the syntheses,structure manipulations,and applications of DBCs.
