检索结果-南通市图书馆

Titanium effect on the microstructure and properties of laminated high boron steel plates

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2015年第5期22卷 492-499页

作者： Lin-lin Yuan Jing-tao han Jing Liu Dong-bin Wei Mehari Zelalem Abathun School of Materials Science and Engineering University of Science and Technology Beijing School of Electrical Mechanical and Mechatronic Systems University of TechnologySydney

High-boron steel is an important material used for thermal neutron shielding. The appropriate amount of added boron must be de- termined because excessive boron may deteriorate the steel＇s workability. A uniform microstructure can be formed by adding titanium to boron steel. In this study, casting and hot rolling were used to fabricate laminated high-boron steel plates whose cores contained 2.25wt% boron and 0wt%-7.9wt% titanium. The effects of titanium content and hot-rolling and heat-treatment processes on the microstructure and properties of the laminated plates were studied. The results indicated that the optimum titanium content was 5.7wt% when the boron content was 2.25wt%, and that the best overall properties were obtained after heat treatment at 1100℃ for 4 h. The tensile strength, yield strength, and elongation at the specified temperature and holding time were as high as 526.88 MPa, 219.36 MPa, and 29%, respectively.

关键词： boron steel laminated materials titanium boride hot rolling heat treatment

Theoretical Foundation of Carbonation Pellet Process for Ferrous Sludge Recycling

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2011年第12期18卷 27-31页

作者： HU Chang-qing han tao ZhanG Yu-zhu ZhanG Zhi-xia College of Metallurgy and Energy Hebei United University Tangshan 063009 Hebei China Hebei Key Laboratory of Modern Metallurgy Technology Tangshan 063009 Hebei China

For the recycling of ferrous sludge from steel industry,the carbonation pellet process should be considered as a ＂green＂ process,since no impurities are added as well as CO2 can be sequestrated and *** the thermodynamic calculation,the carbonation reaction can occur spontaneously and is an exothermic *** on the kinetic analysis through unreacted core model,the interfacial chemical reaction was the rate controlling step in the initial fast stage of carbonation,and the CO2 diffusion through the CaCO3 product layer was the rate controlling step in the following extremely slow *** the carbonation bonded mechanism,the pellet strength was gained by the formation and growing of CaCO3 product *** the interfacial chemical reaction was the critical stage of the entire carbonation process,the emphasizes should be focused on the improvement of sorbent activity and the optimization of process parameters,such as pore structure,pore surface area,and total pressure,CO2 partial pressure,reaction temperature,etc to accelerate the reaction rate and to improve the quality of carbonation pellets.

关键词： CO2 sequestration ferrous sludge carbonation pellet thermodynamics kinetics unreacted core model

The Existence and Application of Strongly Idempotent Self-orthogonal Row Latin Magic Arrays

在线全文

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2018年第4期34卷 693-702页

作者： Yu-fang ZhanG Jing-yuan CHEN Dian-hua WU han-tao ZhanG Department of Mathematics Guangxi Normal University Guilin 541004 China School of Mathematics and Statistics Xinyang Normal University Xinyang 464000 China Computer Science Department The University of Iowa Iowa City IA 52242 USA

Let N = {0, 1, ···, n-1}. A strongly idempotent self-orthogonal row Latin magic array of order n（SISORLMA（n） for short） based on N is an n × n array M satisfying the following properties：（1） each row of M is a permutation of N, and at least one column is not a permutation of N;（2） the sums of the n numbers in every row and every column are the same;（3） M is orthogonal to its transpose;（4） the main diagonal and the back diagonal of M are 0, 1, ···, n-1 from left to right. In this paper, it is proved that an SISORLMA（n）exists if and only if n ？ {2, 3}. As an application, it is proved that a nonelementary rational diagonally ordered magic square exists if and only if n ？ {2, 3}, and a rational diagonally ordered magic square exists if and only if n ≠2.

关键词： Diagonally ordered magic square idempotent nonelementary rational self-orthogonal row Latinmagic array self-orthogonal Latin squares with holes

Prospects for weighing neutrinos in interacting dark energy models using joint observations of gravitational waves andγ-ray bursts

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2024年第9期48卷 225-233页

作者： Lu Feng tao han Jing-Fei Zhang Xin Zhang College of Physical Science and Technology Shenyang Normal UniversityShenyang 110034China Key Laboratory of Cosmology and Astrophysics(Liaoning Province)&Department of Physics College of SciencesNortheastern UniversityShenyang 110819China Key Laboratory of Data Analytics and Optimization for Smart Industry(Ministry of Education) Northeastern UniversityShenyang 110819China National Frontiers Science Center for Industrial Intelligence and Systems Optimization Northeastern UniversityShenyang 110819China

Cosmological observations can be used to weigh neutrinos,but this method is model-dependent,with results relying on the cosmological model *** we consider interactions between dark energy and dark matter,the neutrino mass constraints differ from those derived under the standard *** the contrary,gravitational wave(GW)standard siren observations can measure absolute cosmological distances,helping to break parameter degeneracies inherent in traditional cosmological observations,thereby improving constraints on neutrino *** paper examines the constraints on neutrino mass within interacting dark energy(IDE)models and explores how future GW standard siren observations could enhance these *** multi-messenger GW observations,we consider the joint observations of binary neutron star mergers by third-generation ground-based GW detectors and shortγ-ray burst observations by missions similar to the THESEUS satellite *** current cosmological observations(CMB+BAO+SN),we obtain an upper limit on the neutrino mass in the IDE models of 0.15(or 0.16)*** the inclusion of GW data,the upper limit on the neutrino mass improves to 0.14 *** indicates that in the context of IDE models,the improvement in neutrino mass constraints from GW observations is relatively ***,GW observations significantly enhance the constraints on other cosmological parameters,such as matter density parameter,the Hubble constant,and coupling strength between dark energy and dark matter.

关键词： interacting dark energy neutrino mass gravitational wave standard siren cosmology

Primary hepatic angiosarcoma manifesting as hepatic sinusoidal obstruction syndrome:A case report

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Oncology 2022年第5期14卷 1050-1056页

作者： Fu-Shuang Ha Hua Liu tao han De-Zhao Song The Third Central Clinical College of Tianjin Medical University Tianjin 300170China Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases Tianjin 300170China Artificial Cell Engineering Technology Research Center Tianjin 300170China Tianjin Institute of Hepatobiliary Disease Tianjin 300170China Tianjin Union Medical Center Naikai University Affiliated HospitalTianjin 300121China

BACKGROUND Primary hepatic angiosarcoma(PHA)is a rare malignancy with a poor *** is difficult to diagnose PHA because of the lack of specific symptoms or tumour markers,and it rapidly progresses and has a high *** our knowledge,PHA has not been reported to mimic hepatic sinusoidal obstruction ***,we present a case of PHA manifesting as hepatic sinusoidal obstruction syndrome,diagnosed using transjugular liver biopsy,that resulted in the death of the *** SUMMARY A 71-year-old man was admitted with the primary complaint of abdominal distension,decreased appetite,fatigue in the previous month,and loss of 10 kg of weight in the past 2 *** the liver and spleen were enlarged,and the liver had a medium-hard texture on *** examinations were performed,and abdominal plain computed tomography(CT)and contrastenhanced CT showed hepatomegaly and splenomegaly,as well as diffuse lowdensity shadows distributed in the liver and ***-enhanced CT revealed diffuse,hypodense,nodular or flake shadows in the liver and heterogeneous enhancement in the spleen.A transjugular liver biopsy was *** on the pathology results,the patient was diagnosed with hepatic sinusoidal obstruction syndrome secondary to *** patient’s status further deteriorated and he developed serious hepatic *** patient was discharged,and died 3 d *** PHA is rare and has a poor prognosis;however,transjugular liver biopsy can be safely performed to aid in diagnosis.

关键词： Hepatic angiosarcoma Hepatic sinusoidal obstruction syndrome Outcome Primary cancer High mortality Case report

Time-optimal control of multiple unmanned aerial vehicles with human control input

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Intelligent Computing and Cybernetics 2019年第1期12卷 138-152页

作者： tao han Bo Xiao Xi-Sheng Zhan Jie Wu Hongling Gao Hubei Normal University HuangshiChina College of Mechatronics and Control Engineering Hubei Normal UniversityHuangshiChina

Purpose–The purpose of this paper is to investigate time-optimal control problems for multiple unmanned aerial vehicle(UAV)systems to achieve predefined flying ***/methodology/approach–Two time-optimal protocols are proposed for the situations with or without human control input,***,Pontryagin’s minimum principle approach is applied to deal with the time-optimal control problems for UAV systems,where the cost function,the initial and terminal conditions are given in ***,necessary conditions are derived to ensure that the given performance index is ***–The effectiveness of the obtained time-optimal control protocols is verified by two contrastive numerical simulation ***,the proposed protocolscan successfully achieve the prescribed flying ***/value–This paper proposes a solution to solve the time-optimal control problems for multiple UAV systems to achieve predefined flying shape.

关键词： Unmanned aerial vehicle Human control input Time-optimal control,Pontryagin’s minimum principle

High thermally stable deep red-emitting Sb^(3+),Ho^(3+)-codoped Cs_(2)NaScCl_(6) double perovskite for plant lighting

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Rare Earths 2024年第11期42卷 2043-2050,I0002页

作者： Houjiang You Gaoxuanyu Guan Tianchun Lang Mingsheng Cai Peng Su Huichao He Yang Zhong tao han School of Metallurgy and Materials Engineering Chongqing University of Science and TechnologyChongqing401331China School of Material Science and Engineering Chongqing University of TechnologyChongqing400054China Chongqing Key Laboratory of Materials Surface&Interface Science Chongqing University of Arts and SciencesChongqing402160China Offshore Oil Engineering Co. Ltd.Tianjin300461China

Lead-free halide double perovskite has received widespread attention due to its excellent optical ***,the lack of deep red light and poor heat quenching resistance severely limit its application in plant lighting *** this work,Ho^(3+) was introduced into the thermally stable Cs_(2)NaScCl_(6)host,exhibiting a deep red emission of 660 *** constructing an energy transfer channel between Sb^(3+)and Ho^(3+),the photo luminescence quantum yield(PLQY) of Cs_(2)NaScCl_(6):1%Sb^(3+),40%Ho^(3+) rises up to53.8%,that is increased by 17 times,and its emission intensity can still be maintained by 80% at 423 K,exhibiting good heat quenching *** obtained Cs_(2)NaScCl_(6):1%Sb^(3+),40%Ho^(3+) and Cs_(2)NaScCl_(6):1%Sb^(3+) with blue light emission were employed for fabricating a light-emitting diode(LED) device with a340 nm UV chip,and its emission spectrum matches well the absorption spectra of chlorophyll A and chlorophyll B with the high resemblance of 70% and 75%,making it suitable for use as an artificial light source to control the growth process of plants in the field of plant lighting.

关键词： Lead-free halide double perovskite Energy transfer Thermally stable Plant lighting Rare earths

Hemorrhagic shock due to ruptured lower limb vascular malformation in a neurofibromatosis type 1 patient:A case report

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2022年第31期10卷 11597-11606页

作者： Li-Ping Shen Gang Jin Rang-Teng Zhu han-tao Jiang Department of Clinical Laboratory Taizhou Hospital of Zhejiang Province affiliated to Wenzhou Medical UniversityTaizhou 318000Zhejiang ProvinceChina Department of Clinical Laboratory Enze HospitalTaizhou Enze Medical Center(Group)Taizhou 318000Zhejiang ProvinceChina Department of Orthopedics Taizhou Hospital of Zhejiang Province Affiliated to Wenzhou Medical UniversityTaizhou 318000Zhejiang ProvinceChina Department of Orthopedics Enze HospitalTaizhou Enze Medical Center(Group)Taizhou 318000Zhejiang ProvinceChina

BACKGROUND Neurofibromatosis type 1(NF-1)is a common autosomal dominant genetic *** is characterized by café-au-lait spots and cutaneous *** NF-1 typically involves the skin,nerves,bones,and eyes,vascular manifestation in the form of devastating hemorrhage can occur *** SUMMARY We present the case of a 47-year-old female with NF-1 who had a ruptured right lower limb arterial *** presented with sudden right lower limb swelling for two hours and symptoms of hemorrhagic shock on *** physical examination revealed a right lower limb presenting as elephantiasis and visible dark-brown pigmentation over a large *** tomography angiography showed right lower limb arteriovenous ***,the patient underwent emergency right lower limb digital subtraction angiography(DSA)and vascular embolization after blood ***,after DSA,vascular embolization,and repeated blood transfusions,the anemia and right lower limb swelling and tenderness did not *** a result,the patient underwent right lower extremity above-knee *** amputation,the patient's hemoglobin level improved significantly without blood transfusion,and she was discharged from the hospital after the incision *** pathological examination suggested neurogenic *** other complications had occurred 1-year *** Vascular malformation and rupture are fatal complications of *** may not provide complete relief,the patient might need to undergo neurofibroma resection or amputation.

关键词： Neurofibromatosis type 1 Vascular malformation Hemorrhagic shock Vascular embolization Above-knee amputation Case report

Application of EPNSim Graph in Making Simulation Models for an Integrated Steelmaking-Casting-Rolling

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2000年第1期7卷 22-26页

作者： ZhanG Cai-xia HE Cheng-hong han Jing-tao HE Yu-xin University of Science and Technology Beijing

The EPNSim Graph was used to establish simulation models for an integrated steelmaking-casting-rolling production *** simulation software was developed on the basis of the EPNSim Graph models and some production plans... 详细信息

关键词： production plan simulation schedule EPNSim Graph