The principle and design method of measuring the water level signal based on the multi-channel electrode-type water level gauge were introduced. On the basis of analyzing the characteristic of reclaimed water treatment system, an integrated project design was proposed. The monitor system implemented IPC and PLC, which fulfilled frequency conversion and configuration technology. PC monitor software adopted King View industry control software, which was designed to realize displaying technologic flow, alarming, and historical curve and report forms.

This study aimed to clarify the characteristics of intestinal microbiota in children with hand, foot, and mouth disease (HFMD) under 3 years old. Fresh feces were collected from 54 children with HFMD and 30 healthy children. All of them were <3 years old. Sequencing of the 16S rDNA amplicons was performed. Between the 2 groups, the richness, diversity, and structure of the intestinal microbiota were analyzed by α-diversity and β-diversity. Linear discriminant analysis and LEfSe analyses were used to compare different bacterial classifications. The sex and age of the children in the 2 groups were not statistically significant (P = .92 and P = .98, respectively). Compared to healthy children, the Shannon index, Ace index, and Chao index were lower in children with HFMD (P = .027, P = .012, and P = .012, respectively). Based on the weighted or unweighted UniFrac distance analysis, the structure of the intestinal microbiota in HFMD was also significantly changed (P = .002 and P < .001, respectively). Linear discriminant analysis and LEfSe analysis showed that the changes of key bacteria were manifested as a decrease in Prevotella and Clostridium_XIVa (P < .001 and P < .001, respectively), while Escherichia and Bifidobacterium increased (P = .025 and P = .001, respectively). Children with HFMD under 3 years of age have intestinal microbiota disorder and show a decrease in diversity and richness. The decrease in the abundance of Prevotella and Clostridium, which can produce short-chain fatty acids, is also one of the characteristics of the change. These results can offer a theoretical foundation for the pathogenesis and microecological treatment of HFMD in infants.

“CPOE62”platform is a self-elevating workover platform. Under the construction and service process，because of the particularity of work environment，Not only does it bear its own weight and variable load, but also bears the role of environmental load all the time. Sometimes this environment load will have an enormous destruction. Based on the analysis of environmental load, the author checks the bottom stability and verifies it through ANSYS. These will provide some useful information for the deep sea platform research in Bohai Sea deep-water oil and gas development, which achieves higher security and economic efficiency.

Face gear drive, a new type of gear , is meshed by a cylindrical gear and a bevel gear. It has many unique advantages. Especially in high-speed and heavy-load situation, it has obvious advantages and wide application in the aviation field of power transmission. But the surface gear's major object is low productivity, processing and complex machine tools, adjustment difficulties, high processing costs. Based on this, briefly discussed the status of face gear drive and needs further study, the author proposes a butterfly gear grinding wheel becomes the grinding face gear's theory and the processing method, the author elaborated the numerically-controlled machine tool realizes the surface gear grinding processing method, and has carried on the reasonable choice and the examination to the numerical control gear grinding machine's horizontal sliding table major component (ball screw).

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