Genomic Characteristics and Evolutionary Analysis of a Rare GI.1 Norovirus Isolate From Beijing, China

Zhang, Weishan; Zhang, Wei; Hu, Xinling; Zhou, Xin-Tong; Tian, Guo-Bao; Xu, YingHua; Mi, Kaixia

doi:10.21203/rs.3.rs-888489/v1

Cited by 2 publications

(2 citation statements)

References 34 publications

(40 reference statements)

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“…The solution idea of finite element method is to discretize a global solution domain into multiple small subdomains and connect them into a whole through adjacent nodes [25,26]. Xiaodong Guan et al [23] investigated collisions of ears at different angles using ANSYS.…”

Section: Finite Element Analysis Of Fruit Stem Bending Fracturementioning

confidence: 99%

Design and Testing of a Directional Clamping and Reverse Breaking Device for Corn Straw

Fan

Wei

et al. 2023

Agriculture

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Realizing high-quality and increased production of fresh corn and promoting diversified development of the corn industry structure not only can effectively promote the development of agricultural economy, but also can enrich people’s dietary culture. However, existing fresh corn machinery has a high rate of ear damage during the harvesting process, and the overall harvesting efficiency is not ideal. To reduce damage during the harvesting of fresh corn, a device for breaking ears of fresh corn was designed based on the directional clamping of corn straw reverse breaking method. Based on the physico-mechanical characteristics parameters of fresh corn ears, the main structural parameters of the directional clamping and conveying mechanism and the ear-breaking mechanism were determined. The overall inclination angle of the device is 15°, and the effective conveying length of the directional clamping mechanism is 550 mm; the ear-snapping mechanism comprises a snapping roll composed of a pair of six radial distribution function fingers, with an effective operating radius of 320 mm. By simulating and analyzing the reverse breaking movement of directional clamping corn straw, the key motion parameter ranges of the directional clamping conveying mechanism and breaking mechanism were obtained. The results of the bench test showed that under the optimal conditions of a directional clamping feeding speed of 1.67 m/s, a breaking wheel speed of 80 rpm, and a travel speed of 1.06 m/s, the lowest ear damage rate was 0.57%, and the lowest impurity rate was 1.87%. In addition, it was observed that flexible harvesting can improve harvest efficiency and quality. The study also found that actively applying force to the device can effectively avoid the problem of machine blockage and reduce the damage rate of ears (the following text uses ears instead of fresh corn ears).

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Section: Finite Element Analysis Of Fruit Stem Bending Fracturementioning

confidence: 99%

Design and Testing of a Directional Clamping and Reverse Breaking Device for Corn Straw

Fan

Wei

et al. 2023

Agriculture

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“…Therefore, the indepth study of the mechanics of the freestanding stone cave-dwelling structures, especially the mechanical calculation model of the arch ring in the stone cave-dwelling, is a crucial step to ensure the safety and scientific design of the stone cave-dwelling structure. This has important scientific value and practical significance for the future inheritance, development, and conservation of these sustainable greenhouses [3]. The stone cave-dwelling is classified as an earth-sheltered building according to its construction characteristics.…”

Section: Introductionmentioning

confidence: 99%

Study on Mechanical Calculation Model of Arch Ring in Freestanding Stone Cave-Dwelling

Hao

Lan

2023

Sustainability

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The freestanding stone cave-dwelling is a kind of arched and sheltered house built with stones in the Loess Plateau region of northwest China. Amazingly, before construction, this kind of cave-dwelling was not formally calculated and designed in theory, but only built on the experience passed down by predecessors. The arch ring is the main load-bearing component of the freestanding stone cave-dwelling, through which the upper loads are transmitted to the legs on the left and right sides of the cave-dwelling and then to the foundations. Therefore, it is a prerequisite to ensure the safety of cave dwellings by adopting a reasonable and accurate mechanical calculation model for the arch ring of a stone cave-dwelling to reveal the distribution of internal forces in the arch ring and scientifically design the arch ring accordingly. Three mechanical calculation models (structural calculation diagrams) are adopted for the arch ring of stone cave-dwelling, namely, hingeless arch, two-hinged arch, and three-hinged arch. Based on the force equilibrium and the force method from the structure mechanics, the formulae for calculating the internal force of the stone arch ring under these three different mechanical calculation models are derived respectively. The mechanical calculation results of three calculation models are compared and analyzed to clarify the difference and rationality of the stress results of the arch ring under the three mechanical calculation models and the degree of influence on the force of the lower cave-dwelling leg members. Lastly, in accordance with the internal force calculation results, the calculation formulae for the design of the arch ring thickness are proposed. The study shows that the hingeless arch and two-hinged arch models are more consistent with the actual failure characteristics, two-hinged arch calculation model is safer, more accu-rate, and more reliable than the hingeless arch calculation model when it is used in the mechanical analysis of circular arc arch ring. The findings are intended to serve as theoretical references for the design and construction, protection and reinforcement, and sustainable development and inheritance of cave dwellings in the future.

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Genomic Characteristics and Evolutionary Analysis of a Rare GI.1 Norovirus Isolate From Beijing, China

Cited by 2 publications

References 34 publications

Design and Testing of a Directional Clamping and Reverse Breaking Device for Corn Straw

Design and Testing of a Directional Clamping and Reverse Breaking Device for Corn Straw

Study on Mechanical Calculation Model of Arch Ring in Freestanding Stone Cave-Dwelling

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