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| 1 | A new iterative algorithm for geolocating a known altitude target using TDOA and FDOA measurements in the presence of satellite location uncertainty显示文摘This paper considers the problem of geolocating a target on the Earth surface whose altitude is known previously using the target signal time difference of arrival(TDOA) and frequency difference of arrival(FDOA) measurements obtained at satellites. The number of satellites available for the geolocation task is more than sufficient and their locations are subject to random errors. This paper derives the constrained Crame′r-Rao lower bound(CCRLB) of the target position, and on the basis of the CCRLB analysis, an approximately efficient constrained maximum likelihood estimator(CMLE) for geolocating the target is established. A new iterative algorithm for solving the CMLE is then proposed, where the updated target position estimate is shown to be the globally optimal solution to a generalized trust region sub-problem(GTRS) which can be found via a simple bisection search. First-order mean square error(MSE) analysis is conducted to quantify the performance degradation when the known target altitude is assumed to be precise but indeed has an unknown but deterministic error. Computer simulations are used to compare the performance of the proposed iterative geolocation technique with those of two benchmark algorithms. They verify the approximate efficiency of the proposed algorithm and the validity of the MSE analysis. | Cao Yalu Peng Li Li Jinzhou Yang Le Guo Fucheng | 2015 | Chinese Journal of Aeronautics2015，28，5： | 24 |
| 2 | Medusoid Fossils from the Sinian Xingmincun Formation of Southern Liaoning Province显示文摘Abundant medusoid soft-bodied metazoan fossils have been found in the Sinian Xingmincun Formation(with an isotopic age of 650 Ma) at Qipanmo, Qidingshan and Yangtun of the Dalian-Jinzhou area, southern Liaoning Province; in addition, a number of macroscopic algal fossils have been discovered for the first time in the Getun Formation overlying the Xingmincun Formation. Medusoid fossils include 3 genera and 6 species(all of which are new). Judging from their biological characters, these medusoid fossils are considered to have an intimate affinity with the Ediacara fauna in the terminal Precambrian of Australia, as their characters are close to each other. The authors suggest that these medusoids and the Edicara fauna might be the products of the same period. The discovery of the medusoid fauna in the Xingmincun Formation marks an important event in the evolution of the terminal Precambrian organisms in China, and it is of major practical significance in the study of the Sinian System of China and the correlation of the Sinian strata of northern and southern China. | Hong Zuomin, Huang Zhenfu, Yang Xinde, Lan Jing, Xian Bingcai, Yang Yajun, Regional Geological Survey Party, Bureau of Geology and Mineral Resources of Liaoning Province, Jinzhou, Liaoning and Liu Xiaoliang Shenyang Institute of Geology and Resources, Chinese Academy of Geological Sciences, Shenyang, Liaoning Fang Xinzhong | 1989 | Acta Geologica Sinica(English Edition)1989，63，1： | 20 |
| 3 | Robust adaptive fuzzy backstepping output feedback tracking control for nonlinear system with dynamic uncertainties显示文摘In this paper, an adaptive fuzzy output feedback control approach based on backstepping design is proposed for a class of SISO strict feedback nonlinear systems with unmeasured states, nonlinear uncertainties, unmodeled dynamics, and dynamical disturbances. Fuzzy logic systems are employed to approximate the nonlinear uncertainties, and an adaptive fuzzy state observer is designed for the states estimation. By combining backstepping technique with the fuzzy adaptive control approach, a stable adaptive fuzzy output feedback robust control is constructed recursively, in which nonlinear damping terms and a dynamical signal are introduced to counteract the nonlinear uncertainties and dominate the dynamic disturbances, respectively. It is proved that the proposed adaptive fuzzy control approach guarantees that all the signals of the closed-loop system are semi-globally uniformly bounded, and the tracking error converges to a small neighborhood of the origin. Simulation studies are included to illustrate the effectiveness of the proposed approach. | TONG ShaoCheng & LI YongMing Department of Basic Mathematics, Liaoning University of Technology, Jinzhou 121001, China | 2010 | Science China(Information Sciences)2010，53，2： | 13 |
| 4 | Silencing-specific methylation and single nucleotide polymorphism of hMLH1 promoter in gastric carcinomas Silencing-specific methylation and single nucleotide polymorphism of hMLH1 promoter in gastric carcinomas显示文摘AIM: To investigate CpG methylation and single nucleotidepolymorphism (SNP) of a specific promoter region of hMLH11in primary gastric carcinoma.METHODS: Primary gastric carcinomas (7=80), theircorresponding normal mucosal samples, and gastric mucosalbiopsies from normal/gastritis control patients (n=54) wereused. Hypermethylation at -253 nt and -251 nt in relationwith the translational start site and SNP of a silencing specificregion (-339 nt-46 nt) in the hMLH-1 promoter were analyzedby BstUI-combined bisulfite assay (COBRA), denaturing highperformance liquid chromatogram (DHPLC), and sequencing.RESULTS: (A) The specific methylation at -253 nt and -251nt was observed in 2 of 60 primary gastric carcinomas, butneither in all of the corresponding mucosa nor in normal/gastritis samples, by Bst UI-COBRA and DHPLC. (B) ThehMLH1 promoter was methylated homogeneously in thexenograft of the primary gastric carcinoma with themethylated and unmethylated hMLH11. (C) The pattern ofSNP at -93 nt of the hMLH11 promoter in 54 Chinese patientswith gastric carcinoma was the same as that in the controlpatients: 51% was A/G heteroalleles, 34 % and 15 % wereA/A and G/G homoalleles, respectively.CONCLUSION: Biallelic inactivation of hMLH1 by epigeneticsilencing existed in human primary gastric carcinomahomogeneously. Hypermethylation of hMLH11 may play arole in the early stage of development of a few gastriccarcinomas. The SNP at -93 nt is not related to thesusceptibility of gastric carcinomas. | Da-JunDeng JinZhou Bu-DongZhu Jia-FuJi JeffreyC.Harper StevenM.Powell | 2003 | World Journal of Gastroenterology2003，9，1： | 12 |
| 5 | Theoretical calculation of the impact work in the alloying non-quenched and tempered steel显示文摘Coupled with hot-continuous rolling technology and based on the calculation of the finishing rolling impact work in the non-quenched and tempered Si-Mn steel, the calculations of the finishing rolling impact work in the alloying non-quenched and tempered steel with the elements of Cr, Ni, Mo, W, Cu, V, Nb and Ti are studied with the covalent electron number nA of the strongest bond in alloying phases, the smallest electron density difference ?ρ of phase interfaces, and the number of atom states σ (σ′) which keep the interface electron density continuous. The calculated results show that the finishing rolling impact work of the alloying non-quenched and tempered steel intensely depends on strengthening mechanisms. The solution strengthening, interface strengthening, precipita- tion strengthening of pearlite, and dispersion strengthening will result in the decrease of the finishing rolling impact work; the refinement strengthening, the precipitation strength- ening of V, Nb and Ti in α-Fe-C-V(Nb, Ti), and the residual austenite containing Ni on the boundary of α-Fe-C-Ni will increase the impact work; and the increments or decrements can be calculated with nA, ?ρ, σ (σ′) and weights of alloying elements. The calculation formulas of the finishing rolling impact work in this paper are intergraded with the sug- gested ones of the finishing rolling tensile strength, yield strength, and elongation of the non-quenched and tempered steel. The calculated results agree well with the measured ones. | LIU Zhilin1, LIN Cheng1 & GUO Yanchang2 1. Department of Materials and Chemical Engineering, Liaoning Institute of Technology, Jinzhou 121001, China 2. The Technical Center of Benxi Iron and Steel Group Corporation, Benxi 117000, China | 2006 | Science China(Technological Sciences)2006，49，3： | 11 |
| 6 | Gene expression profiles at different stages of human esophageal squamous cell carcinoma显示文摘AIM: To characterize the gene expression profiles in differentstages of carcinogenesis of esophageal epithelium.METHODS: A microarray containing 588 cancer relatedgenes was employed to study the gene expression profileat different stages of esophageal squamous cell carcinomaincluding basal cell hyperplasia, high-grade dysplasia,carcinoma in situ, early and late cancer. Principle componentanalysis was performed to search the genes which wereimportant in carcinogenesis.RESULTS: More than 100 genes were up or down regulatedin esophageal epithelial cells during the stages of basal cellhyperplasia, high-grade dysplasia, carcinoma in situ, earlyand late cancer. Principle component analysis identified aset of genes which may play important roles in the tumordevelopment. Comparison of expression profiles betweenthese stages showed that some genes, such as P160ROCK,JNK2, were activated and may play an important role inearly stages of carcinogenesis. CONCLUSION: These findings provided an esophagealcancer-specific and stage-specific expression profiles,showing that complex alterations of gene expression underliethe development of malignant phenotype of esophagealcancer cells. | JinZhou Li-QunZhao Mo-MiaoXiong Xiu-Qinwang Guan-RuiYang Zong-LiangQiu MinWu Zhi-HuaLiu | 2003 | World Journal of Gastroenterology2003，9，1： | 11 |
| 7 | A Linear-correction Least-squares Approach for Geolocation Using FDOA Measurements Only显示文摘A linear-correction least-squares(LCLS) estimation procedure is proposed for geolocation using frequency difference of arrival (FDOA) measurements only. We first analyze the measurements of FDOA, and further derive the Cramér-Rao lower bound (CRLB) of geolocation using FDOA measurements. For the localization model is a nonlinear least squares(LS) estimator with a nonlinear constrained, a linearizing method is used to convert the model to a linear least squares estimator with a nonlinear constrained. The Gauss-Newton iteration method is developed to conquer the source localization problem. From the analysis of solving Lagrange multiplier, the algorithm is a generalization of linear-correction least squares estimation procedure under the condition of geolocation using FDOA measurements only. The algorithm is compared with common least squares estimation. Comparisons of their estimation accuracy and the CRLB are made, and the proposed method attains the CRLB. Simulation results are included to corroborate the theoretical development. | LI Jinzhou GUO Fucheng JIANG Wenli | 2012 | Chinese Journal of Aeronautics2012，25，5： | 10 |
| 8 | The effective pressure law for permeability of clay-rich sandstones显示文摘To study the relative sensitivity of permeability to pore pressure Pp and confining pressure Pc for clay-rich rocks,permeability measurements were performed on samples of four clay-rich sandstones.A new method(hereafter denoted the 'slide method') was developed and used for analyzing the permeability data obtained.The effective pressure coefficients for permeability nk were calculated.The values of nk were found to be greater than 1.0 and insensitive to changes in pressure.These results confirmed observations previously made on clay-rich rocks.Also,the coefficients nk obtained had different characteristics for different samples because of differences in the types of clay they contained.The effective pressure law(σeff=Pc-nkPp) determined using the slide method gave better results about k(σeff) than classic Terzaghi's law(σeff=Pc-Pp). | Zhao Jinzhou Xiao Wenlian Li Min Xiang Zuping Li Lijun Wang Jun | 2011 | Petroleum Science2011，8，2： | 9 |
| 9 | VALENCE ELECTRON STRUCTURE OF HIGH PROPERTY HIGH SPEED RESISTANCE STEEL AND ITS COMPOSITION DESIGN显示文摘Theempiricalelectrontheory of solidsand molecules( EET) and theimproved TFDtheory wereapplied tocalculatethe phasestructurefactorsand interfaceconjunction factorsofcom mon alloying elementsin high speed impact resistance ( HSIR) steel. According tothese va lenceelectron structure parametersitis deduced thatthe alloying elements of high propertyHSIRsteelshould be Mn, Cr, Ni and Mo. The microscopicstructure ofthesteel with this compositionisthe mixtureof martensite, bainiteand austeniteafter quenching andlow tem peraturetempering.Itspropertiesare:σb = 1750 MPa,σ0 2 = 1460 MPa,δ5 = 12 7 % , AKV(at 40 ℃, cross direction) = 21J, which exceed the requirement of design. For the thick plateof high property HSIRsteel,itissuggestedto add alittleamountof Cu on thebasisofabovecomposition . | Z.L. Li1,2) ,C.X.Ma2) and Z.L.Liu1) 1) Department of Materials Science and Engineering,Liaoning Institute of Technology,Jinzhou 121001 ,China 2) Collage of Science, Northeast University ,Shenyang,110006 , China | 1999 | Acta Metallurgica Sinica(English Letters)1999，12，4： | 8 |
| 10 | Influence of valence electron structures of phase and biphase interfaces of sulfides on hot brittleness in steel显示文摘This paper calculates the electron structures of phase of FeS, MnS and their biphase interface electron structures with austenite in steel. The precipitation and the transformation of FeS and MnS are investigated through studying the valence electron pair numbers on the strongest bond nA with the structure formation factor S. The continuity of electron density and its relation with stress are explored in the biphase interfaces with the electron density difference D. Using nA, S, D? we explain the reason why FeS can bring about hot brittleness in steel and the physical mechanism why MnS may eliminate or inhibit hot brittleness, based on which satisfying results are obtained by calculating several rare-earth sulfides. | LIU Yan1,3, LIU Zhilin1, ZHANG Chengwei1,2 & ZHOU Yingchun1 1. Liaoning Institute of Technology, Jinzhou 121001, China 2. China National Oil and Gas Exploration and Development Corporation, Beijing 100011, China 3. College of Science, Northeastern University, Shengyang 110006, China | 2004 | Science China(Technological Sciences)2004，47，4： | 7 |
| 11 | Impact of serum levels of lipoprotein lipase, hepatic lipase, and endothelial lipase on the progression of coronary artery disease显示文摘Purpose: The purpose of this study was to investigate the relationship between serum levels of lipoprotein lipase(LPL), hepatic lipase(HL), and endothelial lipase(EL) and the progression of coronary artery disease(CAD).Materials and methods: According to the inclusion criteria, exclusion criteria, diagnostic criteria, angiography results, and the random matching scheme, the enrolled patients were divided into the following two groups: the progression-free group(n ? 47) and the progression group(n ? 15). The baseline characteristics and various biochemical parameters were obtained from the medical records and medical history. Serum LPL, HL, and EL levels were detected by ELISA. The correlation between serum LPL, HL, and EL levels and coronary lesions was statistically analyzed with SPSS software.Results: Significant differences were observed in serum levels of HL and EL between the progression-free group and the progression group(HL, 75.5 ? 39.2 ng/mL vs. 125.1 ? 42.1 ng/mL, P < 0.05;EL, 139.2 ? 59.6 pg/mL vs.175.1 ? 40.1 pg/mL, P < 0.05), while the difference in the LPL level was not significant(P > 0.05). Receiver operating characteristic curve(ROC) analysis showed that the area under the curve(AUC) values of LPL, HL, and EL were 0.506(95% CI: 0.369–0.642, P ? 0.9470), 0.792(95% CI: 0.664–0.888, P < 0.0001), and 0.693(95% CI:0.553–0.811, P ? 0.0095), respectively. Additionally, logistic regression analysis showed that the serum level of HL was an independent risk factor for coronary artery lesion progression.Conclusion: Serum levels of EL and HL, but not the serum level of LPL, were positively correlated with the progression of CAD. The serum level of HL was an independent risk factor for the progression of CAD, while the serum level of EL or LPL was not an independent risk factor for the progression of CAD. For the diagnosis of CAD progression, the serum level of HL was better than the serum level of EL or LPL. | Hui Han Daopeng Dai Wencheng Wang Jinzhou Zhu Zhengbin Zhu Lin Lu Ruiyan Zhang | 2019 | Journal of Interventional Medicine2019，2，1： | 6 |
| 12 | A combination extract of Renshen(Panax Ginseng),Yinyanghuo(Herba Epimedii Brevicornus),Yuanzhi(Radix Palygalae) and Jianghuang(Rhizoma Curcumae Longae) decreases glycogen synthase kinase 3β expression in brain cortex of APPV717I transgenic mice显示文摘OBJECTIVE:To investigate the neuroprotective mechanism of combination extract of Renshen(Panax Ginseng),Yinyanghuo(Herba Epimedii Brevicornus),Yuanzhi(Radix Palygalae) and Jianghuang(Rhizoma Curcumae Longae)(GEPT) in treating Alzheimer's disease on the target of glycogen synthase kinase 3β(GSK-3β).METHODS:Three-month-old APPV717I transgenic mice were randomly divided into ten groups(n=12 per group) and intragastrically administrated vehicle or medicines:APP group was given 0.5% CMC,donepezil group was given donepezil(APP + D group)(0.92 mg/kg-1·day-1),and GEPT groups were given small dose of GEPT(APP+Gs group)(0.075 g/kg-1·day-1),medium dose(APP+Gm group)(0.15 g/kg-1·day-1),and large dose(APP+Gl group)(0.30 g/kg-1·day-1) for 4 or 8 months,respectively.Three-month-old C57BL/6J mice as vehicle controls(n=12) were given 0.5% CMC for 4 or 8 months as well.The GSK-3β expression in the cortex of 7-and 11-month-old APPV717I transgenic mice with and without GEPT or donepezil treatment and normal C57BL/6J mice were measured via Western blotting and Immunohistochemistry.RESULTS:Immunohistochemistry analysis showed significant increase of GSK-3β in the cerebral cortex of 7-month-old APP group(compare to control group P=0.003),while the GSK-3β expression of donepezil or GEPT group were all significantly decreased(Donepezil vs APP:P=0.041;Gl vs APP:P= 0.049;Gm vs APP:P=0.029;Gh vs APP:P=0.036).Western blot analysis showed similar results.The densitometric measures of GSK-3β in APP mice increased significantly as compared with the control group(P=0.008).And the GSK-3β expression in donepezil and GEPT groups were all decreased.There was significant difference between Gh group or donepezil group and the control group(P=0.05).Similar findings were shown in the 11-month-old mice in each group,except for greater decrease of GSK-3β in the GEPT group.CONCLUSION:GEPT can effectively decrease the level of GSK-3β expression in the brain cortex of APPV717I transgenic mice,and such effect is more significant in 11-month-old mice.This partially explains the neuroprotecting mechanism of GEPT in preventing and treating of AD. | Jing Shi Jinzhou Tian Xuekai Zhang Chuiyou Zeng Mingqing Wei Pengwen Wang Yongyan Wang | 2013 | Journal of Traditional Chinese Medicine2013，33，2： | 6 |
| 13 | 石家河遗址群调查报告显示文摘一、调查工作的学术基础、目的和经过石家河遗址群位于湖北省天门县石家河镇境内(图一)。其田野考古工作始于50年代。1954年冬,天门、京山两县联合修建石龙水库干渠。在开挖到天门县石家河镇地段时。 | A Joint Archaeology Team of Department of Archaeology,Beijing University, Hubei Institute of Cultural Relics and Archaeology, Jinzhou Museum,Hubei | 1993 | 南方民族考古1993，，1： | 5 |
| 14 | Morphological Engineering of Sensing Materials for Flexible Pressure Sensors and Artificial Intelligence Applications显示文摘As an indispensable branch of wearable electronics,flexible pressure sensors are gaining tremendous attention due to their extensive applications in health monitoring,human-machine interaction,artificial intelligence,the internet of things,and other fields.In recent years,highly flexible and wearable pressure sensors have been developed using various materials/structures and transduction mechanisms.Morphological engineering of sensing materials at the nanometer and micrometer scales is crucial to obtaining superior sensor performance.This review focuses on the rapid development of morphological engineering technologies for flexible pressure sensors.We discuss different architectures and morphological designs of sensing materials to achieve high performance,including high sensitivity,broad working range,stable sensing,low hysteresis,high transparency,and directional or selective sensing.Additionally,the general fabrication techniques are summarized,including self-assembly,patterning,and auxiliary synthesis methods.Furthermore,we present the emerging applications of high-performing microengineered pressure sensors in healthcare,smart homes,digital sports,security monitoring,and machine learning-enabled computational sensing platform.Finally,the potential challenges and prospects for the future developments of pressure sensors are discussed comprehensively. | Zhengya Shi Lingxian Meng Xinlei Shi Hongpeng Li Juzhong Zhang Qingqing Sun Xuying Liu Jinzhou Chen Shuiren Liu | 2022 | Nano-Micro Letters2022，14，9： | 5 |
| 15 | Theoretical calculation of the finishing rolling impact work in non-quenched and tempered Si-Mn steel显示文摘Based on the hot-continuous rolling technology, the finishing rolling impact work α k of the non-quenched and tempered Si-Mn steel is theoretically calculated with the covalent electron number nA of the strongest bond in alloying phases, and the smallest interface electron density difference Δρ of alloying phase interface and the number of atom states σ which keep the interface electron density continuous. Calculations show that the solution strengthening, the precipitation strengthening, and the interface strengthening will result in the decrease of the finishing rolling impact work α k, and the effects of the number of atom states σ which keep the interface electron density continuous on the finishing rolling impact work α k are different. Taking the impact work and the number of atom states σ 0 keeping the electron density continuous of the phase interface α-Fe/α-Fe-C between α-Fe and α-Fe-C as reference values, the impact work of the interface will increase when σ of some interface is larger than σ 0; otherwise, the impact will decrease. Therefore, the finishing rolling impact work α k can be calculated with the impact value of the refined α-Fe matrix and the influence amounts caused by the solution strengthening, the precipitation strengthening, the interface strengthening, and the number of atom states σ which keep the interface electron density continuous. The calculated results agree well with the measured ones. In this paper, the effect of S on the impact work is also discussed. | LIU Zhilin1, LIN Cheng1 & WANG Ping2 1. Department of Materials and Chemical Engineering, Liaoning Institute of Technology, Jinzhou 121001, China 2. Mechanical Department, Armor technique Institute of PLA, Changchun 130117, China | 2006 | Science China(Technological Sciences)2006，49，2： | 5 |
| 16 | A Randomized Trial Comparing Radiofrequency Ablation and Surgical Resection for HCC Conforming to the Milan Criteria显示文摘 | Jiwei Huang Lvnan Yan Zheyu Cheng Hong Wu Liang Du Jinzhou Wang Yinglong Xu Yong Zeng | 2010 | Annals of Surgery2010，，6： | 5 |
| 17 | Source localization and calibration using TDOA and FDOA measurements in the presence of sensor location uncertainty显示文摘Source localization accuracy is very sensitive to sensor location error.This paper performs analysis and develops a solution for locating a moving source using time difference of arrival(TDOA)and frequency difference of arrival(FDOA)measurements with the use of a calibration emitter.Using a Gaussian random signal model,we first derive the Cram′er-Rao lower bound(CRLB)for source location estimate in this scenario.Then we analyze the differential calibration technique which is commonly used in Global Positioning System.It is indicated that the differential calibration cannot attain the CRLB accuracy in most cases.A closed-form solution is then proposed which takes a calibration emitter into account to reduce sensor location error.It is shown analytically that under some mild approximations,our approach is able to reach the CRLB accuracy.Numerical simulations are included to corroborate the theoretical developments. | LI JinZhou GUO FuCheng JIANG WenLi | 2014 | Science China(Information Sciences)2014，57，4： | 4 |
| 18 | Adsorptive desulfurization on a heteroatoms Y zeolite prepared by secondary synthesis显示文摘Gallium atoms have been introduced into the framework of Y zeolite by treating the zeolite with an aqueous solution of ammonium hexafluoro gallate.Desulfurization of various model fuels containing about 500 μg/g sulfur has been studied over the synthesized Y zeolite(GaAlY).The sulfur adsorption capacity is 7.0,17.4,14.5,16.9,6.9 and 5.8 mg(S)/g adsorbent for thiophene,tetrahydrothiophene(THT),4,6-dimethyldibenzothiophene(4,6-DMDBT),dibenzophiophene(DBT),benzothiophene(BT) and 4-methyldibenzothiophene(4-MDBT),respectively.The charges on the S atom in thiophene,THT,4,6DMDBT,DBT,BT and 4-MDBT,calculated using the density functional theory(DFT),are-0.159,-0.298,-0.214,-0.211,-0.193 and-0.188,respectively,implying that the S-M bond between the adsorption sites and thiophene is much weaker than that between the adsorption sites and THT,4,6-DMDBT or DBT.The sulfur removal of FCC gasoline on GaAlY is 68%. | TANG Ke1,HONG Xin1,ZHAO YongHua1,SONG LiJuan2 & SUN ZhaoLin2 1School of Material and Chemical Engineering,Liaoning Institute of Technology,Jinzhou 121001,China 2College of Petrochemical Engineering,Liaoning University of Petroleum & Chemical Technology,Fushun 113001,China | 2010 | Science China Chemistry2010，53，1： | 4 |
| 19 | A New Kind of Linear NTC Sensitive Ceramics显示文摘The preparation method of a new kind of SnO2-CdO-WO3 linear NTC (negative temperature coefficient) thermal sensitive ceramics was related in this paper. The electron transfer formula of this N type semiconducting ceramics was given. Factors which affect temperature- resistance characteristic curve, such as the composition of the material, heat treatment condition, the speed of the temperature rising, heat preservation time and sintering atmosphere were thoroughly studied and analyzed. | Letters Mengkui WANG Department of Physics, Jinzhou Normal College, Jinzhou 121003, China | 2001 | Journal of Materials Science & Technology2001，17，5： | 4 |
| 20 | Interactions between bubble and particles of key minerals of diasporic bauxite through the extended DLVO theory显示文摘The flotation of diasporic bauxite is to separate diaspore(valuable mineral)from aluminosilicate minerals(gangue minerals,mainly including kaolinite,illite and pyrophyllite),and the microscopic interaction force between the two types of minerals and air bubbles determines the separation efficiency.In this paper,based on the extended Derjaguin-Landau-Verwey-Overbeek(DLVO)theory,the van der Waals,electrostatic and hydrophobic interaction between particles of the four minerals mentioned above and air bubbles in collectorless solution were calculated first,and then diaspore and kaolinite were taken as examples to analyze the influence of various factors such as electrolyte concentration,mineral particle size,air bubble size,collector type(dodecylamine hydrochloride(DAH)and sodium oleate(NaOL))and concentration,and pulp pH on the interactions between the particles of valuable mineral and gangue minerals and air bubbles.The results showed that the total extended DLVO interactions between the four minerals and air bubbles were repulsive in most cases in collectorless solution.The increase in electrolyte concentration reduced the interaction force or even changed the direction of the force under certain circumstances.The addition of DAH and NaOL can reduce the adhesion energy barrier of kaolinitebubble and diaspore-bubble respectively.Each type of minerals exhibited a specific interface interaction response with air bubbles in each collector with different pH values.The research results have theoretical guiding significance for the optimization and directional control of diasporic bauxite flotation conditions. | Ningning Zhang Tian Pang Rui Han Songjiang Chen Zhen Li Yuexian Yu Zhongyu Shi Lijun Liu Jinzhou Qu Anning Zhou | 2022 | International Journal of Mining Science and Technology2022，32，1： | 3 |
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