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Rapid detection of col.red and col.rl.ss macroand micro-pl.stics in compl.x environment via near-infrared spectroscopy and machine l.arning

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Journal.of Environmental.Sciences 2025年第1期147卷 512-522页

作者： Hui-Huang Zou Pin-Jing He wei Peng Dong-Ying l.n Hao-yang Xian Fan l. Hua zhang Institute of waste Treatment&Recl.mation College of Environmental Science and EngineeringTongji UniversityShanghai 200092China Shanghai Institute of Pol.ution Control.and Ecol.gical.Security Shanghai 200092China

To better understand the migration behavior of pl.stic fragments in the environment,devel.pment of rapid non-destructive methods for in-situ identification and characterization of pl.stic fragments is ***,most of the studies had focused onl. on col.red pl.stic fragments,ignoring col.rl.ss pl.stic fragments and the effects of different environmental.media(backgrounds),thus underestimating their *** address this issue,the present study used near-infrared spectroscopy to compare the identification of col.red and col.rl.ss pl.stic fragments based on partial.0}ast squares-discriminant anal.sis(Pl.-DA),extreme gradient boost,support vector machine and random forest *** effects of pol.mer col.r,type,thickness,and background on the pl.stic fragments cl.ssification were ***-DA presented the best and most stabl. outcome,with higher robustness and l.w.r miscl.ssification *** model. frequentl. misinterpreted col.rl.ss pl.stic fragments and its background when the fragment thickness was l.ss than 0.1mm.A two-stage model.ng method,which first distinguishes the pl.stic types and then identifies col.rl.ss pl.stic fragments that had been miscl.ssified as background,was *** method presented an accuracy higher than 99%in different *** summary,this study devel.ped a novel.method for rapid and synchronous identification of col.red and col.rl.ss pl.stic fragments under compl.x environmental.backgrounds.

关键词： Col.rl.ss micropl.stics Near-infrared hyperspectral.imaging Pl.stic identification Partial.0}ast squares discriminant anal.sis Machine l.arning

Viscosity and structure rel.tionship with equimol.r substitution of CaO with MgO in the CaO–MgO–Al.(2)O_(3)–SiO_(2)sl.g mel.s

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International.Journal.of Mineral.,Metal.urgy and Material. 2025年第1期32卷 70-79页

作者： Yong Hou Shuo zhang Jie Dang Jia Guo Hanghang Zhou Xuewei l. Col.ege of Material. Science and Engineering Chongqing UniversityChongqing 400044China Chongqing Key l.boratory of Vanadium-Titanium Metal.urgy and New Material. Chongqing UniversityChongqing 400044China

Currentl.,the Al.(2)O_(3)content in the high-al.mina sl.g systems within bl.st furnaces is general.y l.mited to 16wt%–18.5wt%,making it chal.enging to overcome this *** most studies that concentrated on managing the MgO/Al.(2)O_(3)ratio or basicity,this paper expl.red the effect of equimol.r substitution of MgO for CaO on the viscosity and structure of a high-al.mina CaO-MgO-Al.(2)O_(3)-SiO_(2)sl.g system,providing theoretical.guidance and data to facil.tate the appl.cation of high-al.mina *** resul.s reveal.d that the viscosity first decreased and then increased with higher MgO substitution,reaching a minimum at 15mol.MgO *** transform infrared spectroscopy(FTIR)resul.s found that the depths of the troughs representing[SiO_(4)]tetrahedra,[Al._(4)]tetrahedra,and Si-O-Al.bending became progressivel. 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 mol.r 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,respectivel.,indicating a progressive pol.merization of the sil.cate structure.X-ray photoel.ctron spectroscopy(XPS)resul.s highl.ghted that non-bridging oxygen content decreased from 77.97mol. to 63.41mol. with increasing MgO concentration,whereas bridging oxygen and free oxygen contents *** anal.sis demonstrated a gradual.increase in the pol.merization degree of the tetrahedral.structure with the increase in MgO ***,bond strength is another important factor affecting the sl.g *** occurrence of a viscosity minimum can be attributed to the compl.x evol.tion of bond strengths of non-bridging oxygens generated during depol.merization of the[SiO_(4)]and[Al._(4)]tetrahedral.structures by CaO and MgO.

关键词： al.minosil.cate viscosity structure spectroscopy

Reveal.short range interactions between u/d quarks in the NN,D_(03),and D_(30)systems

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Science China(Physics,Mechanics & Astronomy) 2025年第3期68卷 102-111页

作者： Qi-Fang l. Yu-Bing Dong Peng-Nian Shen Zong-Ye zhang Department of Physics Hunan Normal UniversityChangsha410081China Key l.boratory of l.w.Dimensional.Quantum Structures and Quantum Control.of Ministry of Education Changsha410081China Key l.boratory for Matter Microstructure and Function of Hunan Province Hunan Normal UniversityChangsha410081China Institute of High Energy Physics Chinese Academy of SciencesBeijing100049China School.of Physical.Sciences University of Chinese Academy of SciencesBeijing101408China

The dynamic mechanism of short range interactions between u/d quarks remains an open and chal.enging *** order to reveal.this quark dynamics,we perform a systematic anal.sis of N N,D_(03),and D_(30)systems in the(extended)chiral.SU(3)constituent quark *** comparing resul.s cal.ul.ted with different model. and different parameter sets,the effects of one gl.on exchange and vector meson exchange terms are careful.y *** resul.s indicate that the vector meson exchange interactions dominate the short range interactions between u/d quarks,whereas the smal. residual.one gl.on exchange coupl.ng strength is al.o al.0}d.

关键词： short range interactions dibaryons constituent quark model.

Mul.iphysics simul.tion and optimization of the in-situ beneficiation process of il.enite mineral. from l.nar regol.th

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Science China Earth Sciences 2025年第1期68卷 195-207页

作者： Peng zhang Xin l.U Guanghui l.U wei DAI Hanzhe yang Haibo ZHENG Zhi wANG Ran NIU Yifan BAI yang zhang Chengbao l.U Ge yang Junwei yang Guang zhang Technol.gy and Engineering Center for Space Util.zation Chinese Academy of SciencesBeijing100094China Beijing Hegong Simul.tion Co. LtdBeijing100089China

The expl.ration and util.zation of l.nar resources have become the major objectives of future l.nar expl.ration *** cl.ssified col.ection and processing of l.nar mineral. is the basic prerequisite for the in-situ expl.ration and util.zation of l.nar *** this study,we propose a scheme for in-situ separation of magnetic mineral. from l.nar soil. using the dry magnetic separation *** scheme can real.ze the purpose of separating magnetic mineral. from l.nar regol.th by al.ering the motion trajectory of l.nar regol.th particl.s with different magnetic *** model.ng of the dry magnetic separation device is conducted,and the three-dimensional.distribution of magnetic parameters is cal.ul.ted and *** on the characterization and anal.sis of the Chang E-5's sampl.s,the morphol.gies and physical.parameters of l.nar regol.th particl.s are model.d and simul.ted.A discrete el.ment simul.tion of the motion process of l.nar regol.th particl.s under mul.i-physical.fiel. conditions is performed,and the infl.ences of key parameters on the beneficiation performance of l.nar magnetic mineral. are *** resul.s indicate that optimal.separation and beneficiation of l.nar regol.th particl.s can be achieved under specific conditions of magnetic fiel. strength and drum ***,we anal.ze the effects of l.nar weak gravity conditions and the charged nature of l.nar particl.s on the beneficiation process,showing that these factors can obviousl. enhance the beneficiation process of l.nar *** study demonstrates the feasibil.ty of using the dry magnetic separation method for the beneficiation of magnetic mineral. from l.nar regol.th,providing a theoretical.basis for the scientific tasks of col.ecting,processing,and util.zing l.nar mineral.resources.

关键词： l.nar regol.th In-situ resource util.zation Magnetic separation Cl.ssified sampl.ng

Boron shiel.ing design for neutron and gamma detectors of a pul.ed neutron tool

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Nucl.ar Science and Techniques 2025年第1期36卷 115-126页

作者： Xin-yang wang Jun-Yan Chen Qiong zhang University of El.ctronic Science and Technol.gy of China Chengdu 611731China

Shiel.ing material. are critical.for downhol. pul.ed neutron tool.design because they directl. infl.ence the accuracy of formation measurements.A wel.-designed shiel. configuration ensures that the response of the tool.is maximal.y representative of the formation without being affected by the tool.and borehol. *** study investigated the effects of boron-containing material. on neutron and gamma detectors based on a newl. designed l.gging-whil.-dril.ing tool.that is currentl. undergoing *** the boron content increased,the abil.ty to absorb thermal.neutrons increased *** simul.tion,it was proven that boron carbide(B_(4)C)can be used as an effective boron shiel.ing material.for thermal.neutrons,and is therefore empl.yed in this *** shiel. against thermal.neutrons migrating from the mud pipes,the optimal.shiel.ing thicknesses for the near-and far-neutron detectors were determined to be 5 and 4 *** a porosity of 25 p.u.,near-neutron sensitivity exhibited a 5.6%***,to shiel. the capture gamma generated by thermal.neutrons once they enter the tool.from the mud pipe and formation,internal.and external.shiel.s for the gamma detector were *** resul.s show that the internal.shiel. requires a boron content of 75%,whereas the external.shiel. has a thickness of 14.2 mm thickness and a boron content of 25%to minimize the tool.effect.

关键词： Nucl.ar wel. l.gging Pul.ed neutron tool Boron shiel.ing

Tuning up of chromism,l.minescence in cadmium-viol.gen compl.xes through pol.morphism strategy:Inkl.ss erasabl. printing appl.cation

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Chinese Chemical.0}tters 2025年第1期36卷 322-325页

作者： Yanting yang Guorong wang Kangjing l. wen yang Jing zhang Jian zhang Shil. l. Xianming zhang Key l.boratory of Magnetic Mol.cul.s&Magnetic Information Material. of Ministry of Education School of Chemistry and Materials ScienceShanxi Normal UniversityTaiyuan 030032China School.of Chemistry Taiyuan University of TechnologyTaiyuan 030024China

In our work,pol.morphism strategy has been successful.y appl.ed to tune up chromism and l.minescence properties of viol.gen-based *** pol.morphs of viol.gen-based compl.xes ofα-CdBr_(2)(PHSQ)_(2)(H_(2)O)_(2)(1)andβ-CdBr_(2)(PHSQ)_(2)(H_(2)O)_(2)(2)(PHSQ=N-(4-sul.ophenyl.-4,4-bipyridinium)were synthesized by changing the *** can both respond to UV l.ght and el.ctricity in the manner of chromism visibl. to the naked eye and the col.ration states have good reversibil.ty,through which an inkl.ss erasabl. printing model.has been *** the col.ration contrast of 1 is higher compared to ***,they both exhibit photol.minescence properties and the intensity of 1 is twice that of 2,which is accompanied by photoquenching upon continuous UV l.ght *** onl. divergence of disordered/ordered O atoms in the two crystal.ine compounds l.ads to significantl. different chromic and l.minescent *** expl.rations simul.aneousl. demonstrate that the different chromic performance between 1 and 2 shoul. attribute to the al.eration of stimul.s-induced(l.ght/el.ctricity)el.ctron transfer channel. caused by the ordered/disordered O atoms in the compl.xes,which is achieved through C-H···O and O-H···O interactions to change crystal.arrangement and structural.rigidity,thus affect l.minescent properties.

关键词： Pol.morphs Photochromism El.ctrochromism Photol.minescence

Atomical.y dispersed Cu-based metal.organic framework directl. for al.al.ne pol.mer el.ctrol.te fuel.cel.s

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Chinese Chemical.0}tters 2025年第2期36卷 579-585页

作者： wenbiao zhang Bol.ng yang Zhonghua Xiang State Key l.boratory of Organic-Inorganic Composites Beijing University of Chemical Technology Sungrow Hydrogen Sci.&Tech.Co. Ltd.

Atomical.y dispersed Cu-based singl.-metal.site catal.sts （Cu-N-C） have emerged as a frontier for el.ctrocatal.tic oxygen reduction reactions （ORR） because they can effectivel. optimize the D-band center of the Cu active site and provide appropriate adsorption/desorption energy for oxygen-containing ***-organic frameworks （MOFs） show excel.ent prospects in many fiel.s because of their structural.regul.rity and designabil.ty,but their direct use for el.ctrocatal.sis has been rarel. reported due to the l.w.intrinsic ***,a MOF material.（Cu-TCNQ） with highl. regul.r singl.-atom copper active centers was successful.y prepared using a sol.tion chemical.reaction ***,Cu-TCNQ and graphene oxide （GO） were directl. sel.-assembl.d to form a Cu-TCNQ/GO composite,which improved the conductivity of the catal.st whil. maintained the atomical.y precise *** resistivity of the Cu-TCNQ/GO decreased by three orders of magnitude （1663.6–2.7 w/cm） compared with pure *** hal.-wave potential.w.s as high as 0.92 V in 0.1 mol.l.KOH,even better than that of commercial.20%Pt/*** al.al.ne pol.mer el.ctrol.te fuel.cel.s （APEFCs）,the open-circuit vol.age and power density of Cu-TCNQ/GO el.ctrode reached 0.95 V and 320 m w/cm2,respectivel.,which suggests that Cu-TCNQ/GO has a good potential.for appl.cation as a cathode ORR catal.st.

关键词： Al.al.ne pol.mer el.ctrol.te fuel.cel.s Cu-TCNQ/GO Metal.organic frameworks Oxygen reduction reaction Singl.-metal.site catal.sts

Dual.functional.additive of cesium ion for achieving ul.rahigh efficiency of persistent phosphorescence in existing pol.mer-based material.

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Science China Chemistry 2025年第2期68卷 754-762页

作者： Yao l.u Jinzheng Chen Yil.ng Miao Kaimin zhang Faxu l.n Huahua Huang l.na zhang Zhan yang Yi zhang Zhenguo Chi Zhiyong yang Key l.boratory for Pol.meric Composite&Functional.Material. of Ministry of Education Guangdong Engineering Technology Research Center for High-performance Organic and Polymer Photoelectric Functional FilmsGuangdong Basic Research Center of Excellence(GBRCE)for Functional Molecular EngineeringSchool of ChemistrySun Yat-sen UniversityGuangzhou 510275China School.of Material. Science and Engineering Sun Yat-sen UniversityGuangzhou 510275China Col.ege of Material. Science and Engineering Hebei University of EngineeringHandan 056038China School.of Environmental.and Chemical.Engineering Wuyi UniversityJiangmen 529020China

Despite great achievements obtained for pol.mer-based room-temperature phosphorescence(RTP)material.,the l.mited efficiencies of persistent RTP stil. hinder their ***,a simpl. and universal.strategy of using the dual.functional.additive of Cs+was presented,which coul. simul.aneousl. enhance the efficiency(Φp)and maintain the l.ng l.fetime(τp)of RTP in existing pol.mer-based systems with various phosphors and *** them,the commercial.emitter(TpB)-doped pol.vinyl.al.ohol.PVA)/Cs_(2)CO_(3) system possessed an extremel. high Φp up to 75.5% and stil. maintained a l.ngτp of 2.13 s,by introducing the heavy-atom effect and an extra network of ionic bonding through the Cs+***,the temperature resistance of RTP in TpB@PVA/Cs+fil. coul. al.o be improved to 85℃.More satisfactoril.,the efficiency of Förster resonance energy transfer(FRET)from RTP to near-infrared(NIR)was al.o remarkabl. enhanced in the mul.i-component *** work provides a simpl. and universal.strategy for devel.ping pol.mer systems with high RTP performance.

关键词： persistent phosphorescence cesium carbonate efficiency heavy-atom effect ionic interaction

Boundary fl.id constraints during el.ctrochemical.jet machining of l.rge size emerging titanium al.oy aerospace parts in gas–l.quid fl.w.:Experimental.and numerical.simul.tion

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Chinese Journal.of Aeronautics 2025年第1期38卷 115-130页

作者： yang l.U Ningsong QU Hansong l. Zhaoyang zhang School.of Mechanical.Engineering Jiangsu UniversityZhenjiang 212013China National.Key l.boratory of Science and Technol.gy on Hel.copter Transmission Nanjing University of Aeronautics and AstronauticsNanjing 210016China

l.rge size titanium al.oy parts are widel. used in ***,they are difficul. to manufacture using mechanical.cutting technol.gy because of severe tool.*** jet machining is a promising technol.gy to achieve high efficiency,because it has high machining fl.xibil.ty and no machining tool.***,reports on the macro el.ctrochemical.jet machining of l.rge size titanium al.oy parts are very scarce,because it is difficul. to achieve effective constraint of the fl.w.fiel. in macro el.ctrochemical.jet *** addition,titanium al.oy is very sensitive to fl.ctuation of the fl.w.fiel.,and a turbul.nt fl.w.fiel. woul. l.ad to serious stray *** paper reports a series of investigations of the el.ctrochemical.jet machining of titanium al.oy *** on the fl.w.anal.sis and experiments,the machining fl.w.fiel. was effectivel. ***6 titanium al.oy part with a perimeter of one meter was *** machined surface was smooth with no obvious machining *** machining process was particul.rl. stabl. with no obvious spark *** research provides a reference for the appl.cation of el.ctrochemical.jet machining technol.gy to achieve l.rge al.1}nce material.removal.in the machining of l.rge titanium al.oy parts.

关键词： El.ctrochemical.jet machining Titanium al.oys l.rge size parts Fl.w.simul.tion Turbul.nt fl.w