Search Results - Liu Wei

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In today’s information and digital era, data has become an important basic and strategic resource. Based on the perspective of resource science, this paper systematically discusses the historical inevitability and practical necessity of data becoming a basic and strategic resource, and further discu...

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The HDLC signal link is the high level data link control(HDLC) developed by the international organization for standar- dization(ISO). The article follows the HDLC standard data link layer specification, uses the hardware description language Verilog HDL to implement a parallel structure-based HDLC...

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Through the study and understanding of the film bus, in order to maximize the advantages of the bus, this paper combines the direct storage and access technology and ICB bus, and designs an ICB bus based DMA controller. The logic function of the controller is verified by software simulation. The sim...

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In the past, chiral pesticides were explored as racemic mixtures in environmental fate and ecotoxicities. However, as a result of the enantioselective interactions with chiral molecules, the enantiomers of chiral pesticides may have different potential toxicities to humans and animals. The present r...

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The binding of acetochor, pretilachor, butachlor and metolachlor to urease in aqueous solution was studied using UV difference spectrum and fluorescence spectrum methods. According to the UV difference spectrum curve obtained, the UV difference adsorption AA showed rapid change when herbicide concen...

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According to the rules and regulations currently in operation in China, land expropriation is a government activity by which some collective agricultural land is compulsively transformed into state-owned land to meet the needs of social development and economic construction. Of course, the peasants...

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To investigate the effect of different drying conditions on the efficacy of a closed heat pump clothing-drying system, parametric studies with control variables were carried out on the circulating air volumetric flow rate, expansion valve opening, and air inlet temperature within the drying chamber...

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[Objective] To investigate the safety of metro vehicles passing through No.12 turnouts in both lateral and forward directions, providing a theoretical basis for the optimization and maintenance of turnout structures, it is necessary to study the dynamic performance of a metro vehicle-turnout couplin...

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Study on rational determination of the standard of compensatory payment for requisition of land is very important to treat the inconsistency between city and country. This paper discussed the idea of how to confirm the land requisition compensation standard a careful consideration of the general sta...

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Approaches to the chromatographic (GC, HPLC, CE, SFC and TLC) enantiomer separation and determination of chiral contaminates are reviewed. The enanriomers of chiral contaminates are selectively degradation and interaction in soil and water environment. For the separation and determination of main ty...

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The control accuracy of the hydraulic support pushing system directly affects the straightness of the fully mechanized mining face. At present, most position control algorithms for front hydraulic support pushing systems suffer from limited state perception dimensions and complex dynamic disturbance...

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As a kind of seed fiber, cotton fiber was differentiated by epidermal cells of the seed, and was adhered to seed surface. Cotton kernel is rich in fat, protein and other ingredients. However, whether these ingredients affect the differentiation and development of cotton fiber, and subsequently influ...

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Through analyzing the interaction between socio-economic benefits and eco-environment benefits of land use, a dynamic coupling model between land use benefits was set up according to the theory and method of system science. Coupling degree was used to express coordinated relationship of land use ben...

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The enantioselective inclusion interaction of various cyclodextrins (β-CD, PM-β-CD, CM-β-CD) with R/S-2, 4-dichlorprop methyl ester (R/S-2, 4-D) was studied by UV spectra technique. The results show that all cyclodextrins formed 1∶1 inclusion complexes with 2, 4-D, the order of binding constants of...

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To research the relay selection of wireless sensor network ( WSN) to improve the monitoring level of distribution network, a self-adaptive ε-greedy algorithm-based WSN relay selection optimization method is proposed according to the existing ε- greedy method. Firstly, considering the complex topolog...

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