Results 1 to 10 of about 189,105 (268)

Analysis of critical safety distance between tunnel and concealing filled karst cave in the karst area

open access: yesCarsologica Sinica, 2023
If the tunnel construction work is done in the karst area, the tunnel shall keep a certain distance from the karst cave to ensure the stability of the surrounding rock and support.
Wanfeng WANG   +5 more
doaj   +1 more source

Experiment on Production of Silicon Fertilizer from Polyaluminum Chloride Industrial Waste Residue

open access: yesKuangchan zonghe liyong, 2022
Using polyaluminum chloride residue as raw material, the effects of roasting temperature, roasting time, additive ratio and other factors on the activation effect of silicon dioxide in polyaluminum chloride residue were studied by single factor ...
Hongli Gao   +5 more
doaj   +1 more source

Effects of Silkworm Pupae Powder on Carotenoid Fermentation by Rhodotorula sp.

open access: yesLiang you shipin ke-ji, 2022
Effects of silkworm pupae powder concentration, glucose concentration, cultural time and initial pH of culture medium on the fermentation of carotenoid were investigated.
CHEN Xin   +5 more
doaj   +1 more source

Design and Study of a Spindle-Shaped Fry Head-to-Tail Orientation Device

open access: yesFishes, 2023
The head-to-tail orientation of spindle-shaped fry is an important part of automated vaccine injection. The fry’s automatic orientation helps reduce labor and improve efficiency during the automated injection.
Jianping Li   +6 more
doaj   +1 more source

Local Structural Optimization Method Based on Orthogonal Analysis for a Resistant Muffler

open access: yesIEEE Access, 2021
A resistant muffler is the most direct and effective means of reducing exhaust noise from earthmoving equipment. Different types of construction machinery require different mufflers.
Rui Li, Yiqi Zhou, Yuan Xue, Su Han
doaj   +1 more source

Permeability test and fuzzy orthogonal analysis of hydrogenated nitrile O-ring

open access: yesPetroleum, 2015
In the high temperature, high pressure and high corrosive environment of the oil and gas drilling downhole, the weatherability of rubber sealing material has a great influence on the production safety.
Qin Hu, Changcheng Wan, Changxin Wang
doaj   +1 more source

Tribological properties of serpentine lubricant additives evaluated by orthogonal tests method

open access: yesCailiao gongcheng, 2020
Tribological properties of oleic acid modified natural serpentine ultrafine mineral powders as lubricating oil additive were investigated by a reciprocating sliding wear tester.
YIN Yan-li   +7 more
doaj   +1 more source

Sensitivity Analysis of Influencing Factors of Fire Smoke Transport on Subway Station Platforms

open access: yesFire, 2023
This paper investigates the sensitivity of factors influencing the transport of smoke in subway station fires by developing a three-dimensional physical model of a subway station using Building Information Modeling (BIM) technology and importing it into ...
Huaitao Song   +7 more
doaj   +1 more source

Optimization design of scraper angle based on orthogonal test

open access: yesMATEC Web of Conferences, 2018
The scraper angle of milling machine has a direct effect on the milling efficiency. This research establishes the finite element model of scraper, and designs the cutting front angle and the cutting back angle as factor, impact force and the average ...
Wang Can   +5 more
doaj   +1 more source

Optimization of Cooking Technology and Analysis of Quality of Flowering Vicia faba L.

open access: yesShipin gongye ke-ji, 2023
In order to optimize the cooking technology of flowering broad beans, four processing parameters including soaking temperature, soaking time, frying temperature and frying time were selected for single factor and orthogonal optimization experiments, and ...
Yatian CHEN   +5 more
doaj   +1 more source

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