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Numerical investigation on melting characteristics of scrap with heat and mass transfers in molten steel

Journal of Iron and Steel Research International 2023年第6期30卷 1090-1100页

作者： Cong-lin Yao Hong-chun zhu Zhou-hua Jiang hua-bing Li Hong-bin Lu Shu-cai Zhang hao Feng School of Metallurgy Northeastern UniversityShenyang 110819LiaoningChina Institute for Frontier Technologies of Low-Carbon Steelmaking Northeastern UniversityShenyang 110819LiaoningChina Liaoning Province Engineering Research Center for Technologies of Low-Carbon Steelmaking Northeastern UniversityShenyang 110819LiaoningChina State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819LiaoningChina Key Laboratory for Ecological Metallurgy of Multimetallic Ores(Ministry of Education) Shenyang 110819LiaoningChina

Herein,a numerical simulation with simultaneous heat and mass transfers is carried out to investigate the scrap melting characteristics in molten steel after model verification by published experimental *** numerical results show that the scrap melting stages consist of the frozen shell formation stage,the frozen shell remelting stage and the parent scrap melting *** heat transfer coefficient and the carbon mass transfer coefficient between the scrap and the molten steel are,respectively,in the range of 4209-6249 W m^(-2) K^(-1) and 6.4×10^(-5) m s^(-1).Meanwhile,the effects of process parameters on scrap melting time were *** increase in the scrap preheating temperature(T_(scrap)),the molten steel temperature(T_(steel))and the carbon content of molten steel(C_(steel)),and a decrease in the scrap thickness dscrap,can reduce the frozen shell existence time,as well as the scrap melting *** this basis,a quantitative relationship between the aforementioned process parameters and the scrap melting time is obtained to predict the formation of frozen shell(W),which provides process guidance for shortening the scrap melting *** quantitative relationship is expressed as:lnΨ=311.32-2.34ln(T_(scrap))-39.99ln(T_(steel))-0.08ln(d_(scrap))-0.57ln(C_(steel)).

关键词： Frozen shell Scrap melting Heat transfer Mass transfer Numerical simulation Electric arc furnace

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Wavelet inverse scale space for image restoration

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Journal of Systems Engineering and Electronics 2012年第6期23卷 929-935页

作者： Binbin hao Jianguang zhu School of Science China University of Petroleum Qingdao 266580 E R. China School of Science Shandong University of Science and Technology Qingdao 266590 R R. China

This paper proposes a model for image restoration by combining the wavelet shrinkage and inverse scale space （ISS） method. The ISS is applied to the wavelet representation to modify the retained wavelet coefficients, and the coefficients smaller than the threshold are set to zero. The curvature term of the ISS can remove the edge artifacts and preserve sharp edges. For the multiscale interpretation of the ISS and the multiscale property of the wavelet representation, small details are preserved. This paper illustrates that the wavelet ISS model can be deduced from the wavelet based on a total variation minimization problem. A stopping criterion is obtained from this minimization in the sense of the Bregman distance in the wavelet domain. Numerical examples show the improvement for the image denoising with the proposed method in the sense of the signal to noise ratio and with fewer details remained in the residue.

关键词： wavelet shrinkage inverse scale space (ISS) curva-ture term total variation minimization image restoration.

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Synthesis and biological evaluation of a new series of histone deacetylases inhibitors

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Chinese Chemical Letters 2008年第6期19卷 673-675页

作者： Jie Jiao Qiang Wang hua Wei zhu hao Fang Wen Fang Xu School of Pharmaceutical Science Shandong University Jinan 250012 China

Histone deacetylases （HDACs） play an important role in tumorigenesis. Inhibition of HDACs is considered as a potent strategy for cancer therapy. Two lead compounds （ja and jb） were found to have activities against HDACs with IC50 at about 15 μmol/L. Then a new series of hydroximic acid derivatives were designed and synthesized based on them. The HDACs activity assay in vitro found that compounds J04 and ,109 are nearly as potent as the positive control drug Zolinza.

关键词： HDACs Tumorigenesis Cancer therapy Hydroximic acid

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1-萘酚的太赫兹光谱实验及理论研究

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原子与分子物理学报 2025年第4期42卷 33-39页

作者：王利民朱立江孙延华国家能源集团煤焦化有限责任公司乌海016000

1-萘酚是煤化工产物萘的合成产物,对环境和人体健康有危害.采用太赫兹时域光谱(THz-TDS)技术,获得了1-萘酚在0.5~4.0 THz范围内的实测太赫兹吸收谱,同时运用密度泛函理论(DFT)平面波赝势模型对1-萘酚晶胞模型进行理论光谱计算,探讨了平... 详细信息

1-萘酚是煤化工产物萘的合成产物,对环境和人体健康有危害.采用太赫兹时域光谱(THz-TDS)技术,获得了1-萘酚在0.5~4.0 THz范围内的实测太赫兹吸收谱,同时运用密度泛函理论(DFT)平面波赝势模型对1-萘酚晶胞模型进行理论光谱计算,探讨了平面波截断能在800~1600 eV范围内对理论光谱的影响,并对吸收峰的振动模式进行了理论归属.实验结果表明,1-萘酚在0.5~4.0 THz范围内有1.14 THz、1.60 THz、2.16 THz、2.81 THz、3.56 THz共5个吸收峰,平面波截断能1400 eV下得到的理论吸收谱与实测吸收谱在吸收峰个数、峰位、归一化峰强度上均有较好的一致性,5个吸收峰的振动模式均是以两元环为平面的受氢键束缚的面外摇摆振动或者面内扭转振动引起的.这为太赫兹技术对1-萘酚的识别提供了实验和理论基础,具有一定的理论意义和实际应用价值.

关键词：太赫兹密度泛函理论(DFT) 理论光谱 1-萘酚

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A novel AH-D-A-type phase junction material to improve photovoltaic performance and device stability in fullerene OSCs

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Chinese Chemical Letters 2020年第9期31卷 2452-2458页

作者： Lin Shao Fei Tong Mengbing zhu hao Xia Wenhong Peng hua Tan Bin Zhang Yu Liu Weiguo zhu College of Chemistry Xiangtan UniversityXiangtan 411105China School of Materials Science and Engineering Jiangsu Collaborative Innovation Center of Photovoltaic Science and EngineeringJiangsu Engineering Laboratory of Light-Electricity-Heat Energy-Converting Materials and ApplicationsNational Experimental Demonstration Center for Materials Science and EngineeringChangzhou UniversityChangzhou 213164China

In order to boost power conversion efficiency(PCE) and operation stability of organic solar cells(OSCs),we propose a new idea of phase junction materials(PJMs) used as a photoactive layer component to improve device performance and *** this purpose,a novel PJM of H-TRC8 based on rhodanine unit was designed with a conjugated AH-D-A ***,AH is a hydrogen-donating electron acceptor unit,D-A is an electron donor-acceptor *** is found that H-TRC8 has a good carriertransporting ability,as well as definite hydrogen-bond and D-A interaction with donor/acceptor *** H-TRC8 is added into the PBDB-T/PC60BM blend film with 1.0 vol% DIO(1,8-diiodooctane),the resulting blend film exhibited an enhanced absorption and improved *** intermolecular hydrogen bond between H-TRC8 and PBDB-T plays an important role for them,which is confirmed via FT-IR spectra and 2D 1H *** a result,the PBDB-T/PC60BM-based devices with 1.25 wt%H-TRC8 and 1.0 vol% DIO exhibit a significantly improved PCE of 8.06%,which is increased by 20.6% in comparison to that in the binary devices with 1.0 vol% DIO only(PCE=6.68%).Furthermore,the device stability is significantly enhanced with only 43% PCE roll-off at 150℃ for 120 *** work indicates that AH-D-A-type PJMs are promising photovoltaic materials used as photoactive-layer components to achieve high-performance fullerene OSCs with high device stability.

关键词： Phase junction material A_H-D-A H-bond H-TRC8 Performance and stability

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Fluorescence imaging of drug target proteins using chemical probes

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Journal of Pharmaceutical Analysis 2020年第5期10卷 426-433页

作者： hao zhu Itaru Hamachi Department of Synthetic Chemistry and Biological Chemistry Graduate School of EngineeringKyoto UniversityKatsuraNishikyo-kuKyoto615-8510Japan ERATO Innovative Molecular Technology for Neuroscience Project Japan Science and Technology Agency(JST)Kyoto615-8530Japan

Fluorescence imaging can provide valuable information on the expression,distribution,and activity of drug target *** probes are useful small-molecule tools for fluorescence imaging with high structural flexibility and *** this review,we briefly introduce two classes of fluorescent probes for the visualization of drug target *** activatable probes make use of the specific enzymatic transformations that generally produce a fluorogenic response upon reacting with target ***,specific imaging can be conferred with a ligand that drives the probes to target proteins,where the labeling relies on noncovalent binding,covalent inhibition,or traceless labeling by ligand-directed chemistry.

关键词： Fluorescence imaging Drug target Chemical probe Ligand-directed chemistry

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Mechanical properties and fracture behaviors on 6061 aluminum alloy under shear stress state

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Rare Metals 2011年第5期30卷 550-554页

作者： zhu hao QI Fangjuan College of Materials Science and Engineering Shijiazhuang Tiedao University Shijiazhuang 050043 China

The mechanical properties and fracture behaviors of 6061 aluminum alloy were investigated by the tensile shear tests and in-situ tensile shear tests with tensile shear specimen devised. The results indicate that many slip bands parallel to tensile direction are produced on the surfaces of the specimens. With shear strain rates increasing, the shear yield stress and shear ultimate stress of 6061 aluminum alloy remain constant basically, but the shear fracture strain decreases obviously. The shear strain rates have no influence on the fracture surfaces. The grain boundaries of 6061 aluminum alloy are the weakest area and microcracks initiate at the grain boundaries parallel to tensile direction under shear stress. With the shear stress increasing, the microcracks extend and coalesce. The fracture of specimens is due to coalescence or shearing between the microcracks.

关键词： aluminum alloys tensile shear test mechanical properties fracture

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Polymer light-emitting devices based on europium(Ⅲ) complex with 11-bromo-dipyrido[3,2-a:2′,3′-c]phenazine

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Science China Chemistry 2015年第7期58卷 1152-1158页

作者： Qunping Fan Yu Liu Zhaoran hao Chun Li Yafei Wang hua Tan Weiguo zhu Yong Cao Key Laboratory of Environment-Friendly Chemistry and Application of the Ministry of Education College of Chemistry Xiangtan University Institute of Polymer Optoelectronic Material and Devices South China University of Technology

Polymer light-emitting diodes(PLEDs) containing Eu(DBM)3(Br DPPz)(DBM is dibenzoylmethane, and Br DPPz is 11- bromo-dipyrido[3,2-a:2′,3′-c]phenazine) doped in a blend of poly(9,9-dioctylfluorene)(PFO) and 2-tert-butylphenyl-5- biphenyl-1,3,4-oxadiazole(PBD) as the host matrix were reported. Eu(DBM)3(Br DPPz) exhibited high thermal stability and intense UV-Vis absorption. Narrow-bandwidth red emission at 612 nm with a full width at half-maximum(FWHM) of 14.0 nm was observed from Eu(DBM)3(Br DPPz) in these double-layered PLEDs at dopant concentrations from 1 wt% to 8 wt%. For the PLED containing 1 wt% Eu(DBM)3(Br DPPz), a maximum luminance of 829 cd/m2 at 153.5 m A/cm2, highest external quantum efficiency of 1.70% at 2.1 m A/cm2 and maximum luminance of 0.74 cd/A at 4.31 m A/cm2 were obtained.

关键词： europium(Ⅲ) complexes electroluminescence optophysical properties polymer light-emitting diodes

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Crystal Structure, Energy Band and Optical Properties of Phosphate In(PO_3)_3

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Chinese Journal of Structural Chemistry 2005年第12期24卷 1468-1475页

作者： CHENG Wen-Dan WU Dong-Sheng ZHANG hao GONG Ya-Jing zhu Jing TONG hua-Nan State Key Laboratory of Structural Chemistry Fujian Institute of Research on theStructure of Matter The Chinese Academy of Sciences Fuzhou Fujian 350002 China Graduate School of the Chinese Academy of Sciences Beijing 100039 China

The crystal of the title compound （InP3O9, Mr = 351.73） has been prepared and structurally determined by X-ray single-crystal diffraction. It crystallizes in the monoclinic system, space group Cc with a = 13.545（6）, b = 19.603（7）, c = 9.672（4）A, β= 127.196（4）°, V= 2045.6（14） ,A^3 and Z = 12. The compound, with a three-fold superstructure, has two kinds of infinite chains of PO4 tetrahedra along the c axis. The absorption and luminescence spectra of In（PO3）3 powder have been measured. The calculated results of crystal energy band structure by DFT indicate that the solid state is kind of insulator. What is more, the bonding and optical properties were also investigated with the CASTEP code.

关键词： crystal structure energy band optical properties

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Controlled Freezing and Open-Pulled Straw (OPS) Vitrification of In vitro Produced Bovine Blastocysts FollowingAnalysis of ATP Content and Reactive Oxygen Species (ROS) Level

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Journal of Integrative Agriculture 2012年第3期11卷 446-455页

作者： Zhao Xue-ming DU Wei-hua WANG Dong hao Hai-sheng QIN Tong LIU Yan zhu hua-bin Embryo Biotechnology and Reproduction Laboratory Institute of Animal Science(IAS)Chinese Academy of Agricultural Sciences(CAAS)Beijing 100193P.R.China

To our knowledge,no single study has systemically compared cryopreservation efficiencies of bovine blastocysts derived from in vitro fertilization （IVF）,intracytoplasmic sperm injection （ICSI） and somatic cell nuclear transfer （SCNT） by controlled freezing and *** experiment,therefore,was designed to compare the cryopreservation of these blastocysts with controlled freezing and OPS ***-5’-triphosphate （ATP） content and reactive oxygen species （ROS） level in blastocysts were also ***,for each type of blastocyst （IVF,ICSI or SCNT）,significant differences were observed between the survival rates of the controlled freezing （（81.56±2.33）,（68.18±4.72） or （47.89±5.83）%） and OPS vitrification groups （（92.24±4.54）,（82.40±3.76） or （78.71±5.91）%;P〈0.05）.Secondly,for each type of blastocyst （IVF,ICSI or SCNT）,ATP content was significantly decreased after controlled freezing or vitrification,and the ATP content in the controlled freezing group （0.43±0.06）,（0.35±0.05） or （0.21±0.02） pmol） was significantly lower than that found in the OPS vitrification group （0.62±0.04）,（0.46±0.03） or （0.30±0.01） pmol;P〈0.05）.Thirdly,ROS level in fresh IVF （（47.33±3.56） c.p.s （counted photons per second）,ICSI （（36.51±2.58） c.p.s） or SCNT blastocysts （（26.44±1.49） c.p.s） was significantly lower than that found in the OPS vitrification group （（72.14±4.31）,（58.89±3.89） or （40.11±5.73） c.p.s;P〈0.05）,but higher than that of the controlled freezing group （34.41±3.32）,（23.13±1.26） or （15.46±2.45） c.p.s;P〈0.05）.The present study indicated that vitrification is more efficient in the cryopreservation of bovine blastocysts derived from IVF,ICSI or SCNT than controlled ***,both vitrification and controlled freezing significantly altered the ATP content and ROS level in those blastocysts.

关键词： ATP content controlled freezing in vitro production blastocysts OPS vitrification ROS level

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