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Effect of relative humidity on the desulfurization performance of calcium-based desulfurizer

Journal of Environmental Sciences 2024年第4期138卷 179-188页

作者： Juan Lǖ yu Fu haiyan yu HuanWang Zhe Wang haiyan Chen School of Environment and Resource Southwest University of Science and TechnologyMianyang 621010China Guangyuan Emergency Management bureau Guangyuan 628000China

Low desulfurization efficiency impedes the wide application of dry desulfurization technology,which is a low-cost and simple process,and one significant solution is the development and manufacture of high-performance *** this study,firstly,a steam jet mill was used to digest quicklime;then,we utilized numerical simulation to study the flow field distribution and analyze the driving factors of quicklime digestion;and lastly,the desulfurization performance of the desulfurizer was evaluated under different relative *** results show that the desulfurizer prepared via the steam jet mill had better apparent activity than traditional ***,the entire jet flow field of the steam jet mill is in a supersonic and highly turbulent flow state,with high crushing intensity and good particle acceleration *** contact with the nascent surface maximizes the formation of slaked *** experiments demonstrated that the operating time with 100%desulfurization efficiency and the“break-through”time for the desulfurizer prepared via the steam jet mill is longer than that of traditional desulfurizers,and has significant advantages,especially at low flue gas relative *** with traditional desulfurizers,the desulfurizer prepared via steam jet mill expands the range of acceptable flue gas temperature,and the failure temperature is 1.625 times that of traditional *** work breaks through the technical bottleneck of low dry desulfurization efficiency,which is an important step in pushing forward the application of dry desulfurization.

关键词： Dry desulfurization Relative humidity Desulfurization efficiency High-efficiency desulfurizer Quicklime digestion

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New Algorithm for CBR-RBR Fusion with Robust Thresholds

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Chinese Journal of Mechanical Engineering 2012年第6期25卷 1255-1263页

作者： XU Mad yu haiyan SHEN Jiang TEDA College Nankai University Tianjin 300457 China College of Management and Economics Tianjin University Tianjin 300072 China

The case-based reasoning（CBR） and rule-based reasoning（RBR） fusion systems include a diverse range of fusion methods and their tasks are characterized by interleaving combination of the reasoning procedures. Existing approaches cannot clarify the complex relationships between data from the knowledge sources nor uniformly represent the heterogeneous case and rule knowledge in one fusion space. As a result, existing approaches fail to solve system fragility due to knowledge uncertainty and reasoning unreliability. For the purpose of addressing the difficulties, a novel algorithm for CBR-RBR fusion with robust thresholds（CRFRT） is proposed. Heterogeneous case and rule knowledge are uniformly represented in one defined fusion unitary space. The robust thresholds have been achieved to distinguish the complex relationships between meta-knowledge in the fusion space and to enhance system capacity of knowledge identification. Furthermore, fusion reasoning strategies are constructed for CRFRT and its procedure based on which robust solution of the fusion reasoning problem is obtained. Finally, CRFRT is validated by benchmark problems in machine learning. Compared with other CBR and RBR approaches, the reasoning efficiency and accuracy are increased by 5% and 2.2% respectively. The variations of system accuracy are decreased by 2% to 3.8%. The above results show that the CRFRT algorithm boosts the system＇s effectiveness and robustness. The proposed CRFRT can solve the fragility of complex intelligence decision system and give quality performance for fault diagnosis.

关键词： case-based reasoning (CBR) rule-based reasoning (RBR) robust thresholds fusion reasoning system (FRS)

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New approach to eliminate structural redundancy in case resource pools using α mutual information

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Journal of Systems Engineering and Electronics 2013年第4期24卷 625-633页

作者： Man Xu haiyan yu Jiang Shen Department of Industrial Engineering Nankai University College of Management and Economics Tianjin University

Structural redundancy elimination in case resource pools （CRP） is critical for avoiding performance bottlenecks and maintaining robust decision capabilities in cloud computing services. For these purposes, this paper proposes a novel approach to ensure redundancy elimination of a reasoning system in CRP. By using α entropy and mutual information, functional measures to eliminate redundancy of a system are developed with respect to a set of outputs. These measures help to distinguish both the optimal feature and the relations among the nodes in reasoning networks from the redundant ones with the elimination criterion. Based on the optimal feature and its harmonic weight, a model for knowledge reasoning in CRP （CRPKR） is built to complete the task of query matching, and the missing values are estimated with Bayesian networks. Moreover, the robustness of decisions is verified through parameter analyses. This approach is validated by the simulation with benchmark data sets using cloud SQL. Compared with several state-of-the-art techniques, the results show that the proposed approach has a good performance and boosts the robustness of decisions.

关键词： case resource pool (CRP) knowledge reasoning redundancy elimination α mutual information robust decision.

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Mineral Transition of Calcium Aluminate Clinker during High-Temperature Sintering with Low-lime Dosage

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Journal of Materials Science & Technology 2015年第12期31卷 1244-1250页

作者： Di Zhang Xiaolin Pan haiyan yu yuchun Zhai School of Materials and Metallurgy Northeastern University

The mineral transition mechanism and physicochemical property of calcium aluminate clinker sintered at 1350 ℃ were systematically studied using analytical reagent α-Al 2O 3,CaCO 3 and SiO 2 when the molar ratio of CaO to Al 2O 3 is *** results show that the formation of Ca 2SiO 4 accelerates the diffusion of CaO and Al 2O 3,which promotes the formation of CaAl 2O 4 determined by dilatometer,X-ray diffraction,Fourier transform infrared spectroscopy and scanning electron microscopy *** 4O 7,Ca 3Al 2O 6,Ca 3SiO 5 and Ca 2Al 2SiO 7 only exist in the initial stage of reactions,the amounts of which decrease with the increase of sintering *** 3Al 2O 6 and Ca 12Al 14O 33 react with Al 2O 3 and CaAl 4O 7 to form CaAl 2O 4,while Ca 2Al 2SiO 7 reacts with CaO and Ca 12Al 14O 33 to form Ca 2SiO 4 and CaAl 2O *** sintered clinker contains CaAl 2O 4 and γ-Ca 2SiO 4 as well as some Ca 12Al 14O 33 when the sintering duration is longer than 1.0 *** differential scanning calorimetry results reveal that Ca 2SiO 4,Ca 2Al 2SiO 7 and CaAl 2O 4 are formed at985 ℃,1045℃ and 1339 ℃,*** the sintering duration contributes to the transition of β-Ca 2SiO 4 to γ-Ca 2SiO 4,which improves the pulverization and alumina leaching property of the sintered clinker.

关键词： Sintering Pulverization Mineral Calcium aluminates Microstructure

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Analytical and Experimental Studies on Critical Blank-holder Forces in Cylindrical cup deep drawing

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上海交通大学学报 2004年第z2期38卷 101-107页

作者： Lin Zhongqin Sun Chengzhi Chen Guanlong yu haiyan School of Mechanical Engineering Shanghai Jiaotong University Shanghai200030 China School of Mechanical Engineering Shanghai Jiaotong University Shanghai200030 China School of Mechanical Engineering Shanghai Jiaotong University Shanghai200030 China School of Mechanical Engineering Shanghai Jiaotong University Shanghai200030 China

Based on the plastic deformation theory and energy method, the critical blank-holder forces (BHF) of wrinkling and fracture in the cylindrical cup deep-drawing are analyzed. The verify experiments were performed and compared with the theory analysis results. The predictions agree well with the experiment results. Thus, the validated presenttheoretical analysis model may be applied to determinate the suitable BHF.

关键词： blank-holder force wrinkle limit fracture limit sheet metal forming formability window

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New Methods of Determining the Mixed Mode Stress Intensity Factors for V-Shaped Notch

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上海交通大学学报 2004年第z2期38卷 188-193页

作者： Lin Zhong-qin yu haiyan Chen Guanlong Li Shu-hui School of Mechanical Engineering Shanghai Jiaotong University Shanghai200030 P.R.China School of Mechanical Engineering Shanghai Jiaotong University Shanghai200030 P.R.China School of Mechanical Engineering Shanghai Jiaotong University Shanghai200030 P.R.China School of Mechanical Engineering Shanghai Jiaotong University Shanghai200030 P.R.China

In this paper, on the basis of the stress field given by ***, three new photoelastic methods are developed for determining the stress intensity factors K1 and K2 of V-shaped notch. Some photoelastic experiments are performed on a skew -symmetric 45° notch. Measurements of the coordinates components of r,θand fringe order N are made for progressively smaller fringes and used in the proposed methods to solve K1 and *** of apparent K vs. r/l are made and extrapolated to the notch tip to yield the true values of K1 and *** results obtained by the three methods are very close to each other. When the notch problem is simplified as a crack problem, the corresponding equation is identical to the one proposed by D.G. Smith, which shows that the proposed methods are applicable for both notch and crack problems.

关键词： photoelastic stress intensity factors isochromatic fringe V-shaped notch

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Study of the minerogenetic mechanism and origin of Qinghai nephrite from Golmud, Qinghai, Northwest China

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Science China Earth Sciences 2016年第8期59卷 1597-1609页

作者： yu haiyan WANG RuCheng GUO JiChun LI JiaGui YANG XiaoWen State Key Laboratory for Mineral Deposits Research School of Earth Sciences and Engineering Nanjing University Nanjing 210023 China College of Materials Engineering Jinling Institute of Technology Nanjing 211169 China Center for Jewelry Research Nanjing University Nanjing 210093 China Jewelry Inspection Station Nanjing University Nanjing 210093 China Station of Precious Metal Gemstone Quality Control and Inspection Qinghai Province Xi'ning 810008 China

Electronic microprobe analysis showed that all QN samples are mainly composed of tremolite and minor accessory minerals, such as diopside, calcite, serpentinite, and magnetite. According to the cation coefficients, the crystallo-chemistrygenesis illustration demonstrates that all QN deposits are contact metasomatic. Depending on the mole percent of Fe^(2+(3+))/(Mg^(2+)+Fe^(2+(3+)) and the content of Cr, Co, and Ni in all QN samples measured by X-ray fluorescence spectroscopy(XRF) and inductively coupled plasma-mass spectrometry(ICP-MS), green and azure-green QNs are characterized as serpentinite-related contact metasomatic deposit(S-type), whereas white, green-white, brown, blue-violet, yellow, and viridis QNs are dolomite-related contact metasomatic deposit(D-type). The assemblages and chemical composition of accessory minerals of the eight-color QN samples show evident characteristics, which reveal four possible ore-forming processes. We also measured trace and rare earth elements(REEs) in these samples through ICP-MS to deduce the origin of and the changes in metallogenic conditions. The chondrite-normalized REE patterns of D-type QN exhibit moderately negative Eu anomalies with moderate light REE enrichment, flat heavy REE(HREE), and low(50)REE concentrations, similar to dolomitic marble. Green QN samples of S-type show enrichment in HREE and moderately negative Eu anomalies, which is consistent with characteristics of dunite. Whereas azure-green QN samples of S-type exhibit a right-dipping V-type curve with severe depletion in Eu(δEu=0.36–0.47), in accordance with the characteristics of gabbro from yushigou ophiolite in North Qilian mountains. Furthermore, this finding is consistent with the content of trace elements and the petrographic analysis results. On the basis of several significant differences in the characteristic elements, which may have been affected by the metallogenic environment, we inferred the differences in oxygen fugacity and basicity of mine

关键词： Qinghai Nephrite Tremolite Type Process Origin Environment

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Three Dimensional Metal-Surface Processing Parameter Generation Through Machine Learning-Based Nonlinear Mapping

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Tsinghua Science and Technology 2023年第4期28卷 754-768页

作者： Min Zhu Yanjun Dong Bingqing Shen haiyan yu Lihong Jiang Hongming Cai School of Software Shanghai Jiao Tong UniversityShanghai 200240China School of Mechanical Engineering Donghua UniversityShanghai 200240China

The accuracy and efficiency of three-dimensional(3D)surface forming,which directly affects the cycle and quality of production,is important in *** practice,given the uncertainty of metal plate springback,an error exists between the actual plate and the target surface,which creates a nonlinear mapping from computer aided design models to bending *** need to reconfigure parameters and process a surface multiple times to delicately control springback,which greatly wastes human and material *** study aims to address the springback control problem to improve the efficiency and accuracy of sheet metal forming.A basic computation approach is proposed based on the DeepFit model to calculate the springback value in 3D surface *** address the sample data shortage problem,we put forward an advanced approach by combining a deep learning model with case-based reasoning(CBR).Next,a multi-model fused bending parameter generation framework is devised to implement the advanced springback computation approach through surface data preprocessing,CBR-based model matching,convolution neural network-based machining surface generation,and bending parameter generation with a series of model ***,the proposed approaches and the framework are verified by considering saddle surface processing as an ***,this study provides a new idea to improve the accuracy and efficiency of surface processing.

关键词： 3D surface point-cloud machine learning case-based reasoning industrial software

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Evolutionary traits and functional roles of chemokines and their receptors in the male pregnancy of the Syngnathidae

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Marine Life Science & Technology 2023年第4期5卷 500-510页

作者： Han Jiang Zhanwei Zhao haiyan yu Qiang Lin Yali Liu CAS Key Laboratory of Tropical Marine Bio-Resources and Ecology South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China Guangdong Provincial Key Laboratory of Applied Marine Biology South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China University of Chinese Academy of Sciences Beijing 101400China

Vertebrates have developed various modes of reproduction,some of which are found in *** 300 species of the Syngnathidae(seahorses,pipefishes and seadragons)exhibit male pregnancies;the males have specialized brood pouches that provide immune protection,nourishment,and oxygen *** play a vital role at the mammalian maternal–fetal interface;however,their functions in fish reproduction are *** study revealed the evolutionary traits and potential functions of chemokine genes in 22 oviparous,ovoviviparous,and viviparous fish species through comparative genomic *** results showed that chemokine gene copy numbers and evolutionary rates vary among species with different modes of *** lost cxcl13 and cxcr5,which are involved in key receptor–ligand pairs for lymphoid organ ***,Syngnathidae have site-specific mutations in cxcl12b and ccl44,suggesting immune function during ***,transcriptome analysis revealed that chemokine gene expression varies among Syngnathidae species with different types of brood pouches,suggesting adaptive variations in chemokine functions among seahorses and their ***,challenge experiments on seahorse brood pouches revealed a joint immune function of chemokine genes during male *** study provides insights into the evolutionary diversity of chemokine genes associated with different reproductive modes in fish.

关键词： Reproductive mode Immune response Seahorse Brood pouch

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Thermal conductivity of micro/nano-porous polymers: Prediction models and applications

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Frontiers of physics 2022年第2期17卷 135-153页

作者： haiyan yu Haochun Zhang Jinchuan Zhao Jing Liu Xinlin Xia Xiaohu Wu School of Energy Science and Engineering Harbin Institute of TechnologyHarbin 150001China Microcellular Plastics Manufacturing Laboratory(MPML) Department of Mechanical&Industrial EngineeringUniversity of Toronto5 King’s College RoadTorontoM5S 3G8OntarioCanada Cellular Polymer Science&Technology Laboratory School of Materials Science&EngineeringShandong UniversityJinan 250061China Shandong Institute of Advanced Technology Jinan 250100China

Micro/nano-porous polymeric material is considered a unique industrial material due to its extremelylow thermal conductivity, low density, and high surface area. Therefore, it is necessary to establishan accurate thermal conductivity prediction model suiting their applicable conditions and provide atheoretical basis for expanding their applications. In this work, the development of the calculationmodel of equivalent thermal conductivity of micro/nano-porous polymeric materials in recent yearsis summarized. Firstly, it reviews the process of establishing the overall equivalent thermal conductivity calculation model for micro/nanoporous polymers. Then, the predicted calculation models ofthermal conductivity are introduced separately according to the conductive and radiative thermalconductivity models. In addition, the thermal conduction part is divided into the gaseous thermalconductivity model, solid thermal conductivity model and gas-solid coupling model. Finally, it isconcluded that, compared with other porous materials, there are few studies on heat transfer of micro/nanoporous polymers, especially on the particular heat transfer mechanisms such as scale effectsat the micro/nanoscale. In particular, the following aspects of porous polymers still need to be furtherstudied: micro scaled thermal radiation, heat transfer characteristics of particular morphologies at thenanoscales, heat transfer mechanism and impact factors of micro/nanoporous polymers. Such studieswould provide a more accurate prediction of thermal conductivity and a broader application in energyconversion and storage systems.

关键词： thermal conductivity micro/nanoscale thermal radiation micro/nanoscale thermal conduction porous polymers heat transfer properties

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