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Viscosity and structure relationship with equimolar substitution of CaO with MgO in the CaO–MgO–Al_(2)O_(3)–SiO_(2)slag melts

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 70-79页

作者： Yong Hou Shuo Zhang Jie dang Jia Guo Hanghang Zhou Xuewei Lü College of Materials Science and Engineering Chongqing UniversityChongqing 400044China Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New Materials Chongqing UniversityChongqing 400044China

Currently,the Al_(2)O_(3)content in the high-alumina slag systems within blast furnaces is generally limited to 16wt%–18.5wt%,making it challenging to overcome this *** most studies that concentrated on managing the MgO/Al_(2)O_(3)ratio or basicity,this paper explored the effect of equimolar substitution of MgO for CaO on the viscosity and structure of a high-alumina CaO-MgO-Al_(2)O_(3)-SiO_(2)slag system,providing theoretical guidance and data to facilitate the application of high-alumina *** results revealed that the viscosity first decreased and then increased with higher MgO substitution,reaching a minimum at 15mol%MgO *** transform infrared spectroscopy(FTIR)results found that the depths of the troughs representing[SiO_(4)]tetrahedra,[AlO_(4)]tetrahedra,and Si-O-Al bending became progressively deeper with increased MgO *** of the Raman spectra showed that the average number of bridging oxygens per Si atom and the X_(Q^(3))/X_(Q^(2))(X_(Q^(i))is the molar fraction of Q^(i) unit,and i is the number of bridging oxygens in a[SiO_(4)]tetrahedral unit)ratio increased from 2.30 and 1.02 to 2.52 and 2.14,respectively,indicating a progressive polymerization of the silicate structure.X-ray photoelectron spectroscopy(XPS)results highlighted that non-bridging oxygen content decreased from 77.97mol% to 63.41mol% with increasing MgO concentration,whereas bridging oxygen and free oxygen contents *** analysis demonstrated a gradual increase in the polymerization degree of the tetrahedral structure with the increase in MgO ***,bond strength is another important factor affecting the slag *** occurrence of a viscosity minimum can be attributed to the complex evolution of bond strengths of non-bridging oxygens generated during depolymerization of the[SiO_(4)]and[AlO_(4)]tetrahedral structures by CaO and MgO.

关键词： aluminosilicate viscosity structure spectroscopy

Spectra of rational orthonormal systems

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Science China Mathematics 2019年第10期62卷 1961-1976页

作者： Qiuhui Chen Pei dang Tao qian Department of Mathematics College of Mathematics and InformaticsSouth China Agricultural UniversityGuangzhou510642China Faculty of Information Technology Macao University of Science and TechnologyMacaoChina Macao Institute of Systems Engineering Macao University of Science and TechnologyMacaoChina

We use the Weyl correspondence approach to investigate the spectral operators of the Laguerre and the Kautz systems. We show that the basic functions in the Laguerre and the Kautz systems are the eigenvectors of modified Sturm-Liouville operators. The results are further generalized to multiple parameters of one complex variable in both the unit disc and the upper half-plane contexts.

关键词： spectral operator Laguerre and Kautz systems TM system Caley transform Heisenberg group Weyl correspondence

Experimental Study on Flow Boiling of Deionized Water in a Horizontal long Small Channel

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Journal of Thermal Science 2018年第2期27卷 157-166页

作者： HUANG qian JIA Li dang Chao YANG Lixin Institute of Thermal Engineering School of Mechanical Electronic and Control Engineering Beijing Jiaotong University Beijing 100044 China Beijing Key Laboratory of Flow and Heat Transfer of Phase Changing in Micro and Small Scale Beijing 100044 China

In this paper,an experimental investigation on the flow boiling heat transfer in a horizontal long mini-channel was carried out. The mini-channel was with 2 mm wide and 1 mm deep and 900 mm long. The material of the mini-channel was stainless. The working fluid was deionized water. The experiments were conducted with the conditions of inlet pressure in the range of 0.2~0.5 MPa, mass flux in the range of 196.57-548.96 kg/m2 s, and the outlet vapor quality in the range of 0.2 to 1. The heat flux was in the range of 292.86 kW/m2 to 788.48 kW/m2,respectively. The influences of mass flux and heat flux were studied. At a certain mass flow rate, the local heat transfer coefficient increased with the increase of the heat flux. If dry-out occurred in the mini-channel, the heat transfer coefficient decreased. At the same heat flux, the local heat transfer coefficient would depend on the mass flux. It would increase with the mass flux in a certain range,and then decrease if the mass flux was beyond this range. Experimental data were compared with the results of previous studies. Flow visualization and measurements were conducted to identify flow regime transitions. Results showed that there were eight different kinds of flow patterns occurring during the flow boiling. It was found that flow pattern had a significant effect on heat transfer.

关键词： Flow boiling long mini-channel Visualization Evaporator Heat transfer coefficient

New hybrid inertial CQ projection algorithms with line-search process for the split feasibility problem

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Applied Mathematics(A Journal of Chinese Universities) 2023年第1期38卷 144-158页

作者： dang Ya-zheng WANG long YANG Yao-heng School of Management University of Shanghai for Science and TechnologyShanghai 200093China

In this paper, we propose two hybrid inertial CQ projection algorithms with linesearch process for the split feasibility problem. Based on the hybrid CQ projection algorithm, we firstly add the inertial term into the iteration to accelerate the convergence of the algorithm, and adopt flexible rules for selecting the stepsize and the shrinking projection region, which makes an optimal stepsize available at each iteration. The shrinking projection region is the intersection of three sets, which are the set C and two hyperplanes. Furthermore, we modify the Armijo-type line-search step in the presented algorithm to get a new *** algorithms are shown to be convergent under certain mild assumptions. Besides, numerical examples are given to show that the proposed algorithms have better performance than the general CQ algorithm.

关键词： split feasible problem inertial Armijo-type line-search technique projection algorithm convergence

The Interacting Boson Model for Anomalous Rotational Bands

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Communications in Theoretical Physics 2002年第5期38卷 591-596页

作者： qian Cheng-De LIU dang-Bo HE Wei Institute of Theoretical Physics Department of Physics Shanghai Jiao Tong University Shanghai 200030 China Institute of Theoretical Physics Department of Physics Shanghai Jiao Tong University Shanghai 200030 China Institute of Theoretical Physics Department of Physics Shanghai Jiao Tong University Shanghai 200030 China

The interacting boson model for anomalous rotational bands is proposed. In the rotational SU(3) limit,an asymptotic limit is discussed. Within the framework of the model several analytic relations for energies and ele... 详细信息

关键词： g-boson-like excitation, anomalous rotational bands, M1 transtion, 176Hf

KNOWLEDGE DISTANCE IN INFORMATION SYSTEMS

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Journal of Systems Science and Systems Engineering 2007年第4期16卷 434-449页

作者： Yuhua qian Jiye LIANG Chuangyin dang Feng WANG Wei XU School of Computer & Information Technology Shanxi University Taiyuan 030006 China Department of Manufacturing Engineering and Engineering Management City University of Hong Kong Hong Kong School of Management Graduate University of Chinese Academy of Sciences Chinese Academy of SciencesBeifing 100080 China

In this paper, we first introduce the concepts of knowledge closeness and knowledge distance for measuring the sameness and the difference among knowledge in an information system, respectively. The relationship between these two concepts is a strictly mutual complement relation. We then investigaie some important properties of knowledge distance and perform experimental analyses on two public data sets, which show the presented measure appears to be well suited to characterize the nature of knowledge in an information system. Finally, we establish the relationship between the knowledge distance and knowledge granulation, which shows that two variants of the knowledge distance can also be used to construct the knowledge granulation. These results will be helpful for studying uncertainty in information systems.

关键词： Information systems knowledge knowledge distance knowledge granulation

Neuroinflammation in mild respiratory COVID‑19:insights into cognitive impairment in milder cases

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Military Medical Research 2023年第4期10卷 556-558页

作者： qian Li Chun dang Li‑Hua Wang Department of Neurology the Second Affiliated Hospital of Harbin Medical UniversityHarbin 150081China Department of Periodical Press National Clinical Research Center for GeriatricsWest China HospitalSichuan UniversityChengdu 610000China

Severe acute respiratory syndrome coronavirus 2(SARSCoV-2)infection has been extensively shown to cause many neurological sequelae,and cognitive deficits(known as“brain fog”)may particularly and widely occur even in individuals with mild symptoms[1].Peripheral hyperinflammation as well as central nervous system(CNS)local immune responses may synergistically contribute to brain autoimmune *** addition to the direct neuroinvasion of SARS-CoV-2 and nonimmune effects such as severe systemic hypoxemia and vascular thrombosis,the central mechanism by which SARSCoV-2 accelerates cognitive-related symptoms may be related to immune effects[2].However,the precise neuroinflammatory mechanisms of SARS-CoV-2 infection have not been fully ***ández-Casta-da et al.[3]provided direct evidence and unique insights into the potential mechanism of cognitive impairment in mild respiratory coronavirus disease 2019(COVID-19)cases.

关键词： Coronavirus disease 2019(COVID-19) Cognitive impairment Neuroinflammation Microglia C-C motif chemokine ligand 11(CCL11)

Synergism and anion-cation dual chemical substitution in heterostructure sprouted on MXene enable high-efficiency and stable overall water splitting

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Journal of Materials Science & Technology 2023年第16期147卷 207-216页

作者： Zepeng Lv Jinshuai Fei Yang You Xuewei Lv qian Li Jie dang College of Materials Science and Engineering Chongqing UniversityChongqing 400044China National Engineering Research Center for Magnesium Alloys Chongqing UniversityChongqing 400044China State Key Laboratory of Advanced Special Steels&Shanghai Key Laboratory of Advanced Ferrometallurgy School of Materials Science and EngineeringShanghai UniversityShanghai 200444China

The exploration of novel,super-potent and low-cost electrocatalysts for water splitting has always been the kernel in the field of renewable ***,exfoliated Ti_(3)C_(2)T_(x) MXenes work as a substrate to vertically grow polypore N,Ni-Co2P nanoarrays(N,Ni-Co2P@TC)through an in situ interface-growth strategy and subsequent phosphorization and *** well-defined heterointerfaces with positive and negative ions co-modulation as coupled hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)catalysts for efficient overall water splitting are investigated,which possesses excellent durability even at a large current density(±500 mA cm^(-2)).For HER,suitable H_(2)O∗and H∗absorption energies and accelerated electronic transmission make N,Ni-Co2P@TC display a low overpotential of 27 mV at-10 mA cm^(-2) and Tafel slope of 38 mV dec^(–1) in 1 mol/L *** OER,the synergy of N,Ni-Co2P@TC with selfreconfiguration can give enhanced activity with a low overpotential of 232 mV at 10 mA cm^(-2) and a Tafel slope of 57 mV dec^(–1).Additionally,the excellent bifunctional activity allows easily combining for efficient overall water splitting with a low driving voltage(1.51 V)at 10 mA cm^(-2),and the electrolyzer can be driven by a 1.5 V AAA battery.

关键词： Synergism Chemical substitution Heterostructure Overall water splitting MXene

Bilateral malignant glaucoma with bullous keratopathy:A case report

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World Journal of Clinical Cases 2023年第13期11卷 3010-3016页

作者： Ya-Bin Ma Ya-long dang Department of Ophthalmology Sanmenxia Central HospitalSanmenxia 472000Henan ProvinceChina

BACKGROUND Malignant glaucoma,caused by aqueous misdirection,is a challenging postsurgical complication presented with normal/high intraocular pressure and shallowing of the central and peripheral anterior *** incidence is about 0.6%-4.0%.It can be secondary to filtering surgeries,laser iridotomy,and cataract *** axial length and a history of angle closure glaucoma are its main risk ***,we report a bilateral malignant glaucoma with bullous keratopathy in the patient’s left *** SUMMARY We present a case of bilateral malignant *** cause of malignant glaucoma for each eye of this patient was ***,the management strategy and selection of surgical methods were also ***,the normal anterior chamber was ultimately maintained,and maximum visual function was *** though the left eye received multiple surgeries and corneal endothelial decompensation occurred,the formation of a retroendothelial fibrous membrane partially compensated for the function of the corneal *** The formation of a retroendothelial fibrous membrane partially compensated for the function of the corneal endothelium.

关键词： Malignant glaucoma Corneal epithelial cell Lens epithelial cell Bullous keratopathy Retroendothelial fibrous membrane Case report