The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper introduces a wall-climbing robot of investigation that uses the passive vibration of the negative pressure adsorption mode and the new type of round of foot-type alternating walking. It describes the working principle of the robot and its key structure, its main components were checked and the simulation analysis, and the component of the controllable system was illustrated.
The AlSn20 coatings on bearing alloy were deposited using magnetron sputtering technology. The influence of tin target current on the microstructure, hardness, corrosion resistance, bonding force and friction coefficient were analyzed. The results show that when the tin target current are in the scope of 0.19A ∼0.25A, with the decreasing of it, the coating changes from rough structure to fine structure...
Fractal expression of the size distribution of impact crusher of coal is built according to fractal theory. Orthogonal experiment is carried out by impactive crush equipment and size distribution of the crusher of coal is linear fitted and analyzed in double logarithmic coordinates. The results indicate that regression curve in double logarithmic coordinates is straight and linear regression is favorable...
H2S (hydrogen sulfide) was regarded as the research object in this study. The removal performance of two bio-trickling filters was compared. One is the counter flow one, a traditional bio-trickling filter, and the other is a newly self designed cross flow bio-trickling filter. A mixed culture of activated sludge was used as bacterial seed and the bio-film was developed by culturing the bacterial in...
GH4169 is a difficult-to-cut nickel-based superalloy commonly used in aerospace industry. This paper presents a cutting force prediction model in the end milling of GH4169 superalloy with carbide tools by orthogonal experiment. The variance analysis is applied to check the significance of the model, accuracy of the model is verified by experiment. The effect of cutting parameters on the cutting force...
This paper devises an automatic production system based on gas-film Spinning form technology for producing herbal cake of Chinese Medicine plaster. Its technical feature is that sponge circle is made by spinning clipping craftwork with a structure of backsword, and gas-film spinning forming technology is devised to solve the question that die is always agglutinated with medicine body its automatic...
Hydrogen sulfur was regarded as the research object in this study. Correlated research of biological treatment of hydrogen sulfide was investigated. Domestication in an aeration flask was employed to screen out the optimal bacteria (Thiobacillus). Na2S was used as the inducer in the domestication period. Gas-liquid phase joint inoculation method could start up biotrickling filter effectively. The...
The traditional teaching in the computer teaching generally emphasizes the theory, while paying little attention on the cultivation of students' ability to solve practical problems. Consequently, to cultivate students' practical ability in computer teaching is an urgent problem. Case teaching is kind of heuristic teaching method, which focuses on the development of the students' practical ability...
In order to accurately determine the remaining strength of pipelines with corroded defects, this paper studied the B31G Code and theoretical basis of the finite element analysis. Aiming at piping pressure of the same pipeline with corroded defect, we make direct calculation by B31G Code and Improved B31G ; according to the corroded defect size and piping internal pressure, mechanical model is set...
In order to make the sewerage pipelines play an important role in the drainage capacity and extend their service life span, it is necessary to inspect them regularly to estimate the possible existing leakage, corrosion, mud accumulation, and even collapse. This paper presents a novel approach for the sewer inspection through the use of single immersion ultrasonic probe joined with a rotating planar...
X-ray imaging is of paramount importance for clinical and preclinical imaging but it is fundamentally restricted by the attenuation-based contrast mechanism, which has remained essentially the same since Roentgen's discovery a century ago. Different from the conventional method based on the attenuation contrast mechanism, X-ray phase-contrast imaging (XPCI) is proposed for the study of biological...
Enterprises are faced with the dual pressures of reducing costs and saving energy and reducing pollution; yet it is entirely possible that the cost and pollution at the same time are cut down through enterprises' technological innovation and management innovation. Based on this idea, the authors tried to integrate the methods of value stream and material flow, simultaneously identifying and monitoring...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.