The large quantity of sediment produced in the hearth during vanadium titano-magnetite smelting in a blast furnace(BF)affects the stability of the blast furnace operation.Testing and analysis of the sediment in the he...The large quantity of sediment produced in the hearth during vanadium titano-magnetite smelting in a blast furnace(BF)affects the stability of the blast furnace operation.Testing and analysis of the sediment in the hearth of Chengde Iron and Steel Company?s BF No.7 revealed that it was mainly concentrated in the location below the tuyere and above the iron notch.Notably,some of the bonding material(sediment)consisted of greater than 50%pig iron,and the pig iron distributed in the slag was granular.It is proposed that a large quantity of Ti C and Ti(C,N)are deposited on the surface of the pig iron.These high melting point materials mix with iron drops,preventing the slag from flowing freely,thus leading to the formation of bonding materials.In addition,the viscosity and melting temperature of the slag in the tuyere areas fluctuate greatly,and thus the properties of the slag are unstable.Moreover,the slag contains large quantities of carbon,which results in the reduction of Ti O2.The resultant precipitation of Ti is followed by the formation of Ti C in the slag,which also leads to an increase in the viscosity of the slag and difficulty in achieving separation of the slag-iron.In fact,all of these factors interact with each other,and as a result,sediment is formed when the operating conditions in the hearth fluctuate.展开更多
Coat color polymorphism in domestic animals provides a robust framework for elucidating mechanisms of species adaptation,domestication,and genomic diversity.Leiqiong cattle,a representative indicine breed from souther...Coat color polymorphism in domestic animals provides a robust framework for elucidating mechanisms of species adaptation,domestication,and genomic diversity.Leiqiong cattle,a representative indicine breed from southern China,are predominantly yellow-coated,although a subset exhibits a solid black phenotype.To determine the genetic basis of this variation,a genome-wide association study(GWAS)was performed in 212 Leiqiong bulls.A pronounced association signal was detected on chromosome 6 within the fifth intron of the CORIN gene,providing the first evidence of the potential influence of CORIN on bovine coat color variation.Integration of these results with publicly available genomic datasets and haplotype analyses indicated that the yellow coat phenotype is derived from Indian indicine ancestry,whereas the black coat phenotype emerged through introgression from wild bovine lineages and artificial hybridization with Wagyu cattle.Comparative analysis of Indian indicine cattle with divergent coat colors revealed distinct LEF1 haplotypes within a shared CORIN background,suggesting an ancient and complex domestication history underlying coat color variation.These findings provide direct evidence that introgression has shaped phenotypic variation in East Asian cattle and offer novel insights into the genetic architecture of pigmentation,with implications for future breeding strategies.展开更多
The permeability index is one of the important production indicators to monitor the operation of blast furnace.It is crucial to grasp the trends of changes in the new permeability index in time.For the complex vibrati...The permeability index is one of the important production indicators to monitor the operation of blast furnace.It is crucial to grasp the trends of changes in the new permeability index in time.For the complex vibration spectrum of the permeability index,a prediction model of the permeability index based on the VMD-PSO-BP(variational mode decomposition-particle swarm optimization-back propagation)method was proposed.Firstly,the key factors that affect the permeability index of blast furnace were studied from multiple perspectives.Then,the permeability index was divided into multiple sub-modes based on the difference of frequency bands by the VMD algorithm,and a PSO-BP prediction model was established for each sub-mode.Finally,the prediction results of each sub-mode were summed to obtain the final one.The results show that the composite prediction accuracy by using the VMD algorithm is 3%higher than that of the traditional prediction method,which has better applicability.展开更多
The welding characteristics of 5052 aluminum alloy and Q235 low-carbon steel sheet were systematically studied by the refilled friction stir spot welding.The effects of rotation speed and pressure speed on weld formin...The welding characteristics of 5052 aluminum alloy and Q235 low-carbon steel sheet were systematically studied by the refilled friction stir spot welding.The effects of rotation speed and pressure speed on weld forming,tensile strength,and welded joint structure were analyzed in different welding modes.The results indicated two different connection modes:the chimeric mode and the non-chimeric mode.The corresponding depression depth are 2 and 2.4 mm,respectively.In the non-chimeric connection mode,the steel/aluminum metallurgical interface is a smooth transition,the hook structure is obvious,and the welding mechanism mainly depends on the mutual diffusion between atoms.However,in the chimeric mode,a hook structure will be formed at the metallurgical interface of steel and aluminum.The connection mechanism is determined by mechanical interlocking and mutual diffusion.The maximum strength value is 7.48 kN in non-chimeric mode.At this time,the spindle speed is 1300 r/min and the pressure speed is 1 mm/s.There were two types of fractures:the button fracture mode and the peel fracture mode.展开更多
[Objective]To observe the short-term clinical efficacy of ciprofloxacin+oxaliplatin combined with Shengmaiyin onⅡ/Ⅲrectal cancer patients.[Method]120(2011.2-2018.2,Department of Surgical oncology,The Center Hospital...[Objective]To observe the short-term clinical efficacy of ciprofloxacin+oxaliplatin combined with Shengmaiyin onⅡ/Ⅲrectal cancer patients.[Method]120(2011.2-2018.2,Department of Surgical oncology,The Center Hospital Affiliated to Shenyang Medical College)Ⅱ/Ⅲrectal cancer patients,then they were randomly divided into control group and observation group,every group include 60 patients.The control group were given ciprofloxacin+oxaliplatin,and the three-dimensional conformal radiotherapy,observation group were given Shengmaiyin,treatment for 1 month,then assessed the clinical efficacy,the immunidy index(cellular immunity and humoral immunity),and record the adverse reaction.[Results]After treatment,short term clinical efficacy in observation group significantly better than the control group but the difference had no statistical significance(p>0.05).After treatment,the immunidy index(cellular immunity and humoral immunity)in the two groups were better than before treatment,the difference had statistical significance(p<0.05),and the observation group were better than control group,the difference had statistical significance(p<0.05).During the treatment,reducing leucocyte and platelet,nausea,vomit,etc were appearring in both groups,the clinical in the observation group was better than control group(94.00%vs 90.91%),but the difference had no statistical significance(P>0.05).[Conclusions]Using the ciprofloxacin+oxaliplatin combined with Shengmaiyin onⅡ/Ⅲrectal cancer patients treatment can improve the immunidy function and short-term clinical efficacy.展开更多
基金Item Sponsored by National Natural Science Foundation of China(U1360205)
文摘The large quantity of sediment produced in the hearth during vanadium titano-magnetite smelting in a blast furnace(BF)affects the stability of the blast furnace operation.Testing and analysis of the sediment in the hearth of Chengde Iron and Steel Company?s BF No.7 revealed that it was mainly concentrated in the location below the tuyere and above the iron notch.Notably,some of the bonding material(sediment)consisted of greater than 50%pig iron,and the pig iron distributed in the slag was granular.It is proposed that a large quantity of Ti C and Ti(C,N)are deposited on the surface of the pig iron.These high melting point materials mix with iron drops,preventing the slag from flowing freely,thus leading to the formation of bonding materials.In addition,the viscosity and melting temperature of the slag in the tuyere areas fluctuate greatly,and thus the properties of the slag are unstable.Moreover,the slag contains large quantities of carbon,which results in the reduction of Ti O2.The resultant precipitation of Ti is followed by the formation of Ti C in the slag,which also leads to an increase in the viscosity of the slag and difficulty in achieving separation of the slag-iron.In fact,all of these factors interact with each other,and as a result,sediment is formed when the operating conditions in the hearth fluctuate.
基金supported by the National Key R&D Program of China(2022YFF1000100)Shaanxi Innovation Team Project(2022TD-10)+1 种基金Shaanxi Livestock and Poultry Breeding Double-chain Fusion Key Project(2022GD-TSLD-46-0401)Postdoctoral Research Funding of Hainan Province。
文摘Coat color polymorphism in domestic animals provides a robust framework for elucidating mechanisms of species adaptation,domestication,and genomic diversity.Leiqiong cattle,a representative indicine breed from southern China,are predominantly yellow-coated,although a subset exhibits a solid black phenotype.To determine the genetic basis of this variation,a genome-wide association study(GWAS)was performed in 212 Leiqiong bulls.A pronounced association signal was detected on chromosome 6 within the fifth intron of the CORIN gene,providing the first evidence of the potential influence of CORIN on bovine coat color variation.Integration of these results with publicly available genomic datasets and haplotype analyses indicated that the yellow coat phenotype is derived from Indian indicine ancestry,whereas the black coat phenotype emerged through introgression from wild bovine lineages and artificial hybridization with Wagyu cattle.Comparative analysis of Indian indicine cattle with divergent coat colors revealed distinct LEF1 haplotypes within a shared CORIN background,suggesting an ancient and complex domestication history underlying coat color variation.These findings provide direct evidence that introgression has shaped phenotypic variation in East Asian cattle and offer novel insights into the genetic architecture of pigmentation,with implications for future breeding strategies.
基金supports from the National Natural Science Foundation of China Youth Fund Project(52004096).
文摘The permeability index is one of the important production indicators to monitor the operation of blast furnace.It is crucial to grasp the trends of changes in the new permeability index in time.For the complex vibration spectrum of the permeability index,a prediction model of the permeability index based on the VMD-PSO-BP(variational mode decomposition-particle swarm optimization-back propagation)method was proposed.Firstly,the key factors that affect the permeability index of blast furnace were studied from multiple perspectives.Then,the permeability index was divided into multiple sub-modes based on the difference of frequency bands by the VMD algorithm,and a PSO-BP prediction model was established for each sub-mode.Finally,the prediction results of each sub-mode were summed to obtain the final one.The results show that the composite prediction accuracy by using the VMD algorithm is 3%higher than that of the traditional prediction method,which has better applicability.
基金National Natural Science Foundation of China(No.52275306)Beijing Municipal Natural Science Foundation(No.3232021)for their support.
文摘The welding characteristics of 5052 aluminum alloy and Q235 low-carbon steel sheet were systematically studied by the refilled friction stir spot welding.The effects of rotation speed and pressure speed on weld forming,tensile strength,and welded joint structure were analyzed in different welding modes.The results indicated two different connection modes:the chimeric mode and the non-chimeric mode.The corresponding depression depth are 2 and 2.4 mm,respectively.In the non-chimeric connection mode,the steel/aluminum metallurgical interface is a smooth transition,the hook structure is obvious,and the welding mechanism mainly depends on the mutual diffusion between atoms.However,in the chimeric mode,a hook structure will be formed at the metallurgical interface of steel and aluminum.The connection mechanism is determined by mechanical interlocking and mutual diffusion.The maximum strength value is 7.48 kN in non-chimeric mode.At this time,the spindle speed is 1300 r/min and the pressure speed is 1 mm/s.There were two types of fractures:the button fracture mode and the peel fracture mode.
基金Science and technology project of Liaoning province(No.20180551043).
文摘[Objective]To observe the short-term clinical efficacy of ciprofloxacin+oxaliplatin combined with Shengmaiyin onⅡ/Ⅲrectal cancer patients.[Method]120(2011.2-2018.2,Department of Surgical oncology,The Center Hospital Affiliated to Shenyang Medical College)Ⅱ/Ⅲrectal cancer patients,then they were randomly divided into control group and observation group,every group include 60 patients.The control group were given ciprofloxacin+oxaliplatin,and the three-dimensional conformal radiotherapy,observation group were given Shengmaiyin,treatment for 1 month,then assessed the clinical efficacy,the immunidy index(cellular immunity and humoral immunity),and record the adverse reaction.[Results]After treatment,short term clinical efficacy in observation group significantly better than the control group but the difference had no statistical significance(p>0.05).After treatment,the immunidy index(cellular immunity and humoral immunity)in the two groups were better than before treatment,the difference had statistical significance(p<0.05),and the observation group were better than control group,the difference had statistical significance(p<0.05).During the treatment,reducing leucocyte and platelet,nausea,vomit,etc were appearring in both groups,the clinical in the observation group was better than control group(94.00%vs 90.91%),but the difference had no statistical significance(P>0.05).[Conclusions]Using the ciprofloxacin+oxaliplatin combined with Shengmaiyin onⅡ/Ⅲrectal cancer patients treatment can improve the immunidy function and short-term clinical efficacy.
