The eutectic high entropy alloys have attracted extensive attention and are considered one of the most promising new metal materials.The microstructures of large eutectic high entropy alloy ingot with excellent castin...The eutectic high entropy alloys have attracted extensive attention and are considered one of the most promising new metal materials.The microstructures of large eutectic high entropy alloy ingot with excellent casting performance have been rarely reported.In this study,we have prepared a ton class eutectic high entropy alloy ingot via vacuum induction melting for the first time.The evolution of microstructure and macro-segregation from the edge region to the core of the ingot were also revealed.It was found that there was no significant macro-segregation in ton class eutectic high entropy alloy ingot,and chemical elements were distributed uniformly.The coupled growth of the primary phases and eutectic colonies were homogeneously distributed in the ingot,and there is no traditional columnar grain region from the edge region of the ingot to the core.The tensile strength of the sample in the R/2 region of the ton class ingot with elongation greater than 10%is 892.3 MPa,showing an excellent comprehensive mechanical property.This study exhibits an important guidance for the industrial application of large eutectic high entropy alloy casting ingot.展开更多
Zhang Jiebin,also known as Zhang Huiqing and Zhang Jingyue(1563-1640 AD)was from Shanyin(today's Shaoxing,Zhejing Province).People usually call him Zhang Jingyue.He was a famous medical theorist,clinician and the ...Zhang Jiebin,also known as Zhang Huiqing and Zhang Jingyue(1563-1640 AD)was from Shanyin(today's Shaoxing,Zhejing Province).People usually call him Zhang Jingyue.He was a famous medical theorist,clinician and the representative personage of the School of Tonifying with Medicinals Warm in Nature.He is the author of The Classified Classic(Lei Jing),Jingyue's Complete Works(Jing Yue Quan Shu),etc.展开更多
The Hadamengou gold deposit, located 15 km west of Baotou city, Inner Mongolia （Fig. 1）, contains deep-seated faults and a large granite body. The deposit is hosted by the Neoarchean Wulashan Group metamorphic strata.
The electric energy consumed in every ton of acceptable product, namely energy consumption per ton (ECT), is an important overall index for the production process of a fused magnesium furnace. The furnace is the equip...The electric energy consumed in every ton of acceptable product, namely energy consumption per ton (ECT), is an important overall index for the production process of a fused magnesium furnace. The furnace is the equipment for producing the fused magnesia. The ECT value depends on the current in the smelting process. The optimal operation for a fused magnesium furnace is supposed to have the ECT as low as possible, where the key is to predict ECT accurately. By introducing an unknown high-order non linear term, this paper builds a dynamic ECT model for differe nt production batches based on the static ECT model for one batch. The average current is taken as the input of the dynamic ECT model, which is composed of the unknown high-order nonlinear term and a nonlinear model with unknown parameters. The order of the nonlinear term is determined by the distance correlatio n and the nonlinear term is estimated by the stochastic con figuration n etwork, while the parameters of the non linear model is ide ntified by the least square method. The estimation of the nonli near term alter nates with the parameter identification. This paper proposes a prediction method for ECT, which is composed of the order identification of the non linear term, the alternating identification of the model and the ECT prediction model. The simulation experiments are conducted by the on-site data, and the results verify the effectiveness of the proposed prediction method.展开更多
Dear Editor,Tonic immobility(TI),also termed"feigning death," is the ultimate defensive response to in escapable threats.Since some predators do not like to eat dead animals.
On January 19, 2008, the ground breaking ceremony of prebaked anode carbon project with 400 thousand tons annual capacity of Pingguo Haohai Carbon Co. , Ltd was held in Pingguo Industry Zone of Guangxi province. After...On January 19, 2008, the ground breaking ceremony of prebaked anode carbon project with 400 thousand tons annual capacity of Pingguo Haohai Carbon Co. , Ltd was held in Pingguo Industry Zone of Guangxi province. After being put into production, the project with an investment of CNY 0.8 billion, will reach CNY 1.6 billion annual production value.展开更多
In September 2016, the Department of Land and Resources of ttenan Province announced that the First Geological Exploration Institute of Henan Bureau of Geo- Exploration ＆ Mineral Development had recently discovered a...In September 2016, the Department of Land and Resources of ttenan Province announced that the First Geological Exploration Institute of Henan Bureau of Geo- Exploration ＆ Mineral Development had recently discovered a new104.96-ton gold resource, with 122.034 tons of associated silver and also abundant natural soda and lead-zinc mineral resources in the deep and peripheral areas of the Laowan gold deposit in Tongbai County.展开更多
The Wulashan-Hademengou gold ore district in Baotou city, Inner Mongolia, is a further newly discovered super-large gold metallogenic belt in northern China. The accumulated proven gold metal amount is 84.46 t, with a...The Wulashan-Hademengou gold ore district in Baotou city, Inner Mongolia, is a further newly discovered super-large gold metallogenic belt in northern China. The accumulated proven gold metal amount is 84.46 t, with an average grade of 3.53 g/t and a gold metal amount of 63.16 t, with an average grade of 3.30 g/t. The potential reserves are over 100 t.展开更多
基金supported by the Natural Science Basic Research of Shaanxi(No.2022JC-28).
文摘The eutectic high entropy alloys have attracted extensive attention and are considered one of the most promising new metal materials.The microstructures of large eutectic high entropy alloy ingot with excellent casting performance have been rarely reported.In this study,we have prepared a ton class eutectic high entropy alloy ingot via vacuum induction melting for the first time.The evolution of microstructure and macro-segregation from the edge region to the core of the ingot were also revealed.It was found that there was no significant macro-segregation in ton class eutectic high entropy alloy ingot,and chemical elements were distributed uniformly.The coupled growth of the primary phases and eutectic colonies were homogeneously distributed in the ingot,and there is no traditional columnar grain region from the edge region of the ingot to the core.The tensile strength of the sample in the R/2 region of the ton class ingot with elongation greater than 10%is 892.3 MPa,showing an excellent comprehensive mechanical property.This study exhibits an important guidance for the industrial application of large eutectic high entropy alloy casting ingot.
文摘Zhang Jiebin,also known as Zhang Huiqing and Zhang Jingyue(1563-1640 AD)was from Shanyin(today's Shaoxing,Zhejing Province).People usually call him Zhang Jingyue.He was a famous medical theorist,clinician and the representative personage of the School of Tonifying with Medicinals Warm in Nature.He is the author of The Classified Classic(Lei Jing),Jingyue's Complete Works(Jing Yue Quan Shu),etc.
文摘The Hadamengou gold deposit, located 15 km west of Baotou city, Inner Mongolia （Fig. 1）, contains deep-seated faults and a large granite body. The deposit is hosted by the Neoarchean Wulashan Group metamorphic strata.
基金National Natural Science Foundation of China (Nos. 61525302, 61590922, 61503066, 61533007)in part by the Project of Industry and Information Technology Ministry (No. 20171122-6)in part by the Projects of Shenyang (No. Y17-0-004).
文摘The electric energy consumed in every ton of acceptable product, namely energy consumption per ton (ECT), is an important overall index for the production process of a fused magnesium furnace. The furnace is the equipment for producing the fused magnesia. The ECT value depends on the current in the smelting process. The optimal operation for a fused magnesium furnace is supposed to have the ECT as low as possible, where the key is to predict ECT accurately. By introducing an unknown high-order non linear term, this paper builds a dynamic ECT model for differe nt production batches based on the static ECT model for one batch. The average current is taken as the input of the dynamic ECT model, which is composed of the unknown high-order nonlinear term and a nonlinear model with unknown parameters. The order of the nonlinear term is determined by the distance correlatio n and the nonlinear term is estimated by the stochastic con figuration n etwork, while the parameters of the non linear model is ide ntified by the least square method. The estimation of the nonli near term alter nates with the parameter identification. This paper proposes a prediction method for ECT, which is composed of the order identification of the non linear term, the alternating identification of the model and the ECT prediction model. The simulation experiments are conducted by the on-site data, and the results verify the effectiveness of the proposed prediction method.
基金This work was supported in part by the Key-Area Research and Development Program of Guangdong Province(2018B030331001 and 2018B030338001)the National Natural Science Foundation of China(31600860,31630031,31930047,and 91732304)+7 种基金the International Partnership Program of the Chinese Academy of Sciences(172644KYS820170004)the Key Laboratory of the CAS(2019DP173024)the Strategic Priority Research Program of Chinese Academy of Science(XDB32030100)the Guangdong Provincial Key Laboratory of Brain Connectome and Behavior(2017B030301017)the Ten Thousand Talent Program,the Chang Jiang Scholars Program,the Guangdong Special Support Program,the Guangdong Provincial Natural Science Foundation(2018A030313439)the Helmholtz-CAS joint research grant(GJHZ1508)the Shenzhen Government Basic Research Grants(JCYJ20170413164535041)the Shenzhen Key Science and Technology Infrastructure Planning Project(ZDKJ20190204002)。
文摘Dear Editor,Tonic immobility(TI),also termed"feigning death," is the ultimate defensive response to in escapable threats.Since some predators do not like to eat dead animals.
文摘On January 19, 2008, the ground breaking ceremony of prebaked anode carbon project with 400 thousand tons annual capacity of Pingguo Haohai Carbon Co. , Ltd was held in Pingguo Industry Zone of Guangxi province. After being put into production, the project with an investment of CNY 0.8 billion, will reach CNY 1.6 billion annual production value.
文摘In September 2016, the Department of Land and Resources of ttenan Province announced that the First Geological Exploration Institute of Henan Bureau of Geo- Exploration ＆ Mineral Development had recently discovered a new104.96-ton gold resource, with 122.034 tons of associated silver and also abundant natural soda and lead-zinc mineral resources in the deep and peripheral areas of the Laowan gold deposit in Tongbai County.
文摘The Wulashan-Hademengou gold ore district in Baotou city, Inner Mongolia, is a further newly discovered super-large gold metallogenic belt in northern China. The accumulated proven gold metal amount is 84.46 t, with an average grade of 3.53 g/t and a gold metal amount of 63.16 t, with an average grade of 3.30 g/t. The potential reserves are over 100 t.
