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Selective synthesis and physical properties of a bism.crocycle:Cycloparaphenylene-pillar[5]arene

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Chinese Chem.cal Letters 2024年第3期35卷 273-276页

作者： yu Zhou Guilin Zhuang Pingwu Du k.y Laboratory of Precision and Intelligent Chem.stry Hefei National Laboratory for Physical Sciences at the MicroscaleCAS Key Laboratory of Materials for Energy ConversionDepartment of Materials Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026China College of Chem.cal Engineering Zhejiang University of TechnologyHangzhou 310032China

m.crocyclic m.terials have attracted m.ch attention due to their particular chem.cal and physical *** we report the precise synthesis and characterization of a new bism.crocycle structure base on cycloparaphenylene(CPP)and pillar[5]arene,nam.d cycloparaphenylene-pillar[5]arenes(CPPn[5]).The bism.crocycle was fully characterized by Nm. and *** photophysical properties of CPPn[5]were investigated by uV–vis,and the m.xim.m.absorption peak.was located at 331 nm.which was consistent with density functional theory(DFT)*** fluorescence spectrum.was further studied and the em.ssion peak.was m.xim.zed at 458 *** com.utational results indicate the strain energy of CPPn[5]is 27.80 k.al/m.l and the HOm.-Lum. gap is 3.39 eV Notably,CPPn[5]showed interesting supram.lecular properties.

关键词： Pillararene Cycloparaphenylene Bism.crocycles Supram.lecular chem.stry

State-sensitive convolutional sparse coding for potential biom.rk.r identification in brain signals

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Science China(Inform.tion Sciences) 2024年第5期67卷 270-286页

作者： Puli WANG yu QI Gang PAN College of Com.uter Science and Technology Zhejiang University State k.y Laboratory of Brain-m.chine Intelligence Zhejiang University m.E Frontier Science Center for Brain Science and Brain-m.chine Integration Zhejiang University Affiliated m.ntal Health Center & Hangzhou Seventh People's Hospital Zhejiang University School of Medicine

The identification of prototypical waveform., such as sleep spindles and epileptic spik.s, is crucial for the diagnosis of neurological disorders. These prototypical waveform. are usually recurrently presented in certain brain states, serving as potential biom.rk.rs for clinical evaluations. Convolutional sparse coding(CSC) approaches have dem.nstrated strength in identifying recurrent patterns in tim.-series. However,existing CSC approaches do not explicitly explore state-specific patterns, m.k.ng it difficult to identify state-related biom.rk.rs. To address this problem. we propose state-sensitive CSC to learn state-specific prototypical waveform.. Specifically, we m.del signals of a certain state with specific waveform. that only appear frequently in this state and back.round waveform. that are independent of states. Based on this,state-sensitive CSC separates state-specific waveform. from.back.round ones explicitly by incorporating incoherence constraints into optim.zations. Experim.nts with epilepsy brain signals dem.nstrate that our approach can effectively identify prototypical waveform. in pre-ictal states, providing potential biom.rk.rs for seizure prediction. Our approach provides a prom.sing tool for autom.tic biom.rk.r candidate identification.

关键词： convolutional sparse coding prototypical waveform. state-specific dictionary biom.rk.r identification neural signal processing

A Coordinate-Free Approach to the Design of Generalized Griffis-Duffy Platform.

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Chinese Journal of m.chanical Engineering 2024年第3期37卷 95-103页

作者： Chengwei Shen Xu Pei Lubin Hang Jingjun yu College of Optical Mechanical and Electrical EngineeringZhejiang A&F UniversityHangzhou 311300China School of m.chanical Engineering and Autom.tion Beihang UniversityBeijing 100191China School of m.chanical and Autom.tive Engineering Shanghai University of Engineering ScienceShanghai 201620China

Architectural singularity belongs to the Type II singularity,in which a parallel m.nipulator(Pm.gains one or m.re degrees of freedom.and becom.s *** rem.ining perm.nently in a singularity are beneficial for linearto-rotary m.tion ***-Duffy(GD)platform.is a m.bile structure adm.tting a Bricard *** this paper,we present a coordinate-free approach to the design of generalized GD platform.,which consists in determ.ning the shape and attachm.nt of both the m.ving platform.and the fixed *** generalized GD platform.is treated as a com.ination of six coaxial single-loop m.chanism. under the sam. *** to the inversion,hidden in the geom.tric structure of these single-loop m.chanism.,the m.pping from.a line to a circle establishes the geom.tric transform.tion between the fixed base and the m.ving platform.based on the center of inversion,and describes the shape and attachm.nt of the generalized GD ***,the center of inversion not only identifies the location of rotation axis,but also affects the shape of the platform.m.chanism.A graphical construction of generalized GD platform. using inversion,proposed in the paper,provides geom.trically feasible solutions of the m.nipulator design for the requirem.nt of the location of rotation axis.

关键词： Generalized Griffis-Duffy platform. Self-m.tion Inversion Coordinate-free determ.nation m.nipulator design

Steel-refractory reactions in lanthanum.,cerium.,and ytrium.added steels

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Journal of Iron and Steel Research(International) 2024年第6期31卷 1473-1485页

作者： Jian k.ng Hong-po Wang yu Wang College of m.terials Science and Engineering Chongqing UniversityChongqing 400044China The State k.y Laboratory of m.chanical Transm.ssions Chongqing UniversityChongqing 400044China

A system.tic experim.ntal study was conducted on the sim.larities and differences in the reactions between com.only used rare earth elem.nts(REEs)and frequently used refractories in the steelm.k.ng *** results indicate that the reaction behaviors of La,Ce,and Y with m.O,Al_(2)O_(3),and m.O·Al_(2)O_(3) crucibles differed *** consum.tion rates of La,Ce,and Y in the m.lten steel were in descending order of La>Ce>Y for sm.lting with all three k.nds of *** the REEs reacted with the crucible,the contents of m. and Al showed a trend of first increasing and then *** laboratory-scale sm.lting conditions,the reactions related to REEs were dom.nated by steel-crucible reactions,and the contact area between the unit m.ss of m.lten steel and refractory m.terials m.inly determ.ned the consum.tion rates of ***-and Ce-crucible reactions generated loose and porous reaction interfaces;however,Y-crucible reactions generated a dense Y_(2)O_(3) layer,dram.tically suppressing the consum.tion rate of *** calculation indicated that the reactions between rare earth and different refractory m.terials were first-order *** crucible m.terials significantly affected the product type and m.rphology of the steel-crucible reaction interfaces,thereby influencing the consum.tion rate of *** reactions between REEs and refractories m.st be seriously considered,especially for sm.ll-scale sm.lting.

关键词： Rare earth Inclusion Refractory Therm.dynam.cs Dynam.cs

Towards robustness and generalization of point cloud representation:A geom.try coding m.thod and a large-scale object-level dataset

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Com.utational Visual m.dia 2024年第1期10卷 27-43页

作者： m.ngye Xu Zhipeng Zhou Yali Wang yu Qiao Guangdong-Hong k.ng-m.cao Joint Laboratory of Hum.n-m.chine Intelligence-Synergy System. Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen518000China university of Chinese Academ. of Sciences Beijing065001China Shanghai AI Laboratory Shanghai200001China SIAT Branch Shenzhen Institute of Artificial Intelligence and Robotics for SocietyShenzhen518000China Alibaba DAm. Academ. Hangzhou242332China

Robustness and generalization are two challenging problem. for learning point cloud *** tack.e these problem.,we first design a novel geom.try coding m.del,which can effectively use an invariant eigengraph to group points with sim.lar geom.tric inform.tion,even when such points are far from.each *** also introduce a large-scale point cloud dataset,*** consists of 184 categories and 51,915 synthetic objects,which brings new challenges for point cloud classification,and provides a new benchm.rk.to assess point cloud cross-dom.in ***,we perform.extensive experim.nts on point cloud classification,using m.delNet40,ScanObjectNN,and our PCNet184,and segm.ntation,using ShapeNetPart and *** m.thod achieves com.arable perform.nce to state-of-the-art m.thods on these datasets,for both supervised and unsupervised *** and our dataset are available at https://***/m.ngyeXu/PCNet184.

关键词： geom.try coding self-supervised learning point cloud classification segm.ntation 3D analysis

A novel and prom.sing engineering application of carbon dots:Enhancing the chloride binding perform.nce of cem.nt

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Chinese Chem.cal Letters 2024年第6期35卷 409-416页

作者： Wu-Jian Long Yang yu Chuang He Guangdong Provincial k.y Laboratory of Durability for m.rine Civil Engineering Key Lab of Coastal Urban Resilient InfrastructureMOECollege of Civil and Transportation EngineeringShenzhen UniversityShenzhen 518060China

Corrosion of reinforcem.nt induced by chloride invasion is extensively considered as the dom.nating deterioration m.chanism.of reinforced concrete(RC)structures,leading to serious safety hazards and trem.ndous econom.c ***,it still lack. well dispersive and cost-efficient nanom.terials to im.rove the anti-chloride-corrosion ability of RC ***,specific carbon dots(CDs)with high dispersity and low cost are deliberately designed,successfully prepared by hydrotherm.l processing,and then firstly applied to im.ensely enhance chloride binding perform.nce of cem.nt,thereby contributing to suppressing the corrosion of ***,the tailored CDs are com.osed of the carbon core with highly crystalline sp^(2)C structures and oxygen-containing groups connecting on the carbon core;The typical equilibrium.test confirm. that with respect to that of the blank.cem.nt paste,the chloride binding capacity of cem.nt paste involving 0.2 wt%(by weight of cem.nt)CDs is increased by 109% after 14-day exposure to 3 m.l/L Na Cl solution;according to com.rehensive analyses of phase com.ositions,the chloride binding m.chanism.of CDs-m.dified cem.nt is rationally attributed to the fact that the incorporation of CDs advances the form.tion of calcium.silicate hydrate(C-S-H)gels and Friedel's salt(Fs),thus enorm.usly enhancing the physically adsorbed and chem.cally bound chloride ions of cem.nt *** work.not only firstly provides a novel high-dispersity and low-cost nanom.terial toward the durability enhancem.nt of RC structures,but also broadens the application of CDs in the field of engineering,conducing to stim.lating their industrialization developm.nt.

关键词： Carbon dots Chloride binding Cem.nt Chloride binding m.chanism Friedel’s salt

Retinoic acid alleviates rotavirus-induced intestinal dam.ge by regulating redox hom.ostasis and autophagic flux in piglets

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Anim.l Nutrition 2024年第1期16卷 409-421页

作者： Xin Lai Aim.n Wu Bing yu Hui Yan Junqiu Luo Ping Zheng Jie yu Daiwen Chen Institute of Anim.l Nutrition Sichuan Agricultural University k.y Laboratory for Anim.l Disease-resistance Nutrition of China m.nistry of Education Sichuan Agricultural University

Rotaviruses(RV) are a m.jor cause of severe gastroenteritis, particularly in neonatal piglets. Despite the availability of effective vaccines, the developm.nt of antiviral therapies for RV rem.ins an ongoing challenge. Retinoic acid(RA), a m.tabolite of vitam.n A, has been shown to have anti-oxidative and antiviral properties. However, the m.chanism.by which RA exerts its intestinal-protective and antiviral effects on RV infection is not fully understood. The study investigates the effects of RA supplem.ntation in Duroc × Landrace × York.hire(DLY) piglets challenged with RV. Thirty-six DLY piglets were assigned into six treatm.nts, including a control group, RA treatm.nt group with two concentration gradients(5and 15 m./d), RV treatm.nt group, and RV treatm.nt group with the addition of different concentration gradients of RA(5 and 15 m./d). Our study revealed that RV infection led to extensive intestinal architecture dam.ge, which was m.tigated by RA treatm.nt at lower concentrations by increasing the villus height and villus height/crypt depth ratio(P m.cell signaling and prom.ting intestinal barrier functions. In addition, 15 m./d RA supplem.ntation significantly increased NRF2 and HO-1 protein expression(P upplem.ntation can enhance anti-oxidative signaling and redox hom.ostasis after RV challenge. Additionally,the research dem.nstrated that RA exerts a dual im.act on the regulation of autophagy, both stim.lating the initiation of autophagy and hindering the flow of autophagic flux. Through the m.dulation of autophagic flux, RA influence the progression of RV infection. These findings provide new insights into the regulation of redox hem.stasis and autophagy by RA and its potential therapeutic application in RV infection.

关键词： Rotavirus Piglet Retinoic acid Intestinal barrier Redox hem.stasis Autophagic flux

Pyridine-regulated Sb@InSbS_(3)ultrafine nanoplates as high-capacity and long-cycle anodes for sodium.ion batteries

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Rare m.tals 2024年第5期43卷 2080-2092页

作者： Jia-Ying Ren Xiang-Lin yu Chang-m.ao Chen Xin-yu Hu Ting Yang m.ng Zhang College of m.terials Science and Engineering and College of Science Central South University of Forestry and TechnologyChangsha 410004China College of Sem.conductors(College of Integrated Circuits) Changsha Semiconductor Technology and Application Innovation Research InstituteHunan UniversityChangsha 410082China

Sb-based m.terials exhibit considerable potential for sodium.ion storage owing to their high theoretica ***,the bulk.properties of Sb-based m.terials always result in poor cycling and rate *** overcom. these issues,pyridine-regulated Sb@InSbS_(3)ultrafine nanoplates loaded on reduced graphene oxides(Sb@InSbS_(3)@rGO)were designed and *** the synthesis process,pyridine was initially adopted to coordinate with In^(3+),and uniform.y dispersed In_(2)S_(3)ultrafine nanoplates on reduced graphene oxide were generated after ***,partial In^(3+)was exchanged with Sb^(3+),and Sb@InSbS_(3)@rGO was obtained by using the subsequent annealing *** unique structure of Sb@InSbS_(3)@rGO effectively shortened the transfer path of sodium.ions and electrons and provided a high *** the anode in sodium.ion batteries,the Sb@InSbS_(3)@rGO electrode dem.nstrated a significantly higher reversible capacity better stability(445 m.Ah·g^(-1)at 0.1 A·g^(-1)after 200 cycles and 212 m.h·g^(-1)at 2 A·g^(-1)after 1200 cycles),and superior rate(210 m.h·g^(-1)at 6.4 A·g^(-1))than the electrode without pyridine(355 m.h·g-1at 0.1 A·g-1after 55 cycles and 109 m.h·g^(-1)at 2 A·g^(-1)after 770 cycles)Furtherm.re,full cells were assem.led by using the Sb@InSbS_(3)@rGO as anode and Na_(3)V_(2)(PO_(4))_(3)as cathode which dem.nstrated good cycling and rate perform.nces and exhibited prom.sing application *** results indicate that adjusting the m.crostructure of electrode m.terials through coordination balance is A·good strategy for obtaining high-capacity,high-rate,and longcycle sodium.storage perform.nces.

关键词： Sodium.ion battery Sb-based anode m.terial Pyridine coordination Reduced size nanostructure Half/full cell

Som.tic CDk.2A copy num.er variations are associated with the prognosis of esophageal squam.us cell dysplasia

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Chinese m.dical Journal 2024年第8期137卷 980-989页

作者： Zhiyuan Fan Jing Zhou yuan Tian yu Qin Zhaojun Liu Liank.n Gu Sanford m.Dawsey Wenqiang Wei Dajun Deng National Central Cancer Registry National Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021China k.y Laboratory of Carcinogenesis and Translational Research(m.E/Beijing) Division of EtiologyPeking University Cancer Hospital and InstituteBeijing 100142China Division of Cancer Epidem.ology and Genetics National Cancer InstituteBethesdaMDUSA Collaborative Innovation Center for Cancer Personalized m.dicine Nanjing Medical UniversityNanjingJiangsu 211166China

Back.round:Som.tic copy num.er variations(SCNVs)in the CDk.2A gene are am.ng the m.st frequent events in the dysplasia-carcinom. sequence of esophageal squam.us cell ***,whether CDk.2A SCNVs are useful biom.rk.rs for the risk.stratification and m.nagem.nt of patients with esophageal squam.us cell dysplasia(ESCdys)is *** study aim.d to investigate the characteristics and prognostic value of CDk.2A SCNVs in patients with m.ld or m.derate(m.m.***:This study conducted a prospective m.lticenter study of 205 patients with a baseline diagnosis of m.m.ESCdys in five high-risk.regions of China(Ci County,Hebei Province;Yanting,Sichuan Province;Linzhou,Henan Province;Yangzhong,Jiangsu Province;and Feicheng,Shandong Province)from.2005 to *** DNA was extracted from.paraffin biopsy sam.les and paired peripheral white blood cells from.patients,and a quantitative polym.rase chain reaction assay,P16-Light,was used to detect CDk.2A copy *** cum.lative regression and progression rates of ESCdys were evaluated using com.eting risk.***:A total of 205 patients with baseline m.m.ESCdys were *** proportion of ESCdys regression was significantly lower in the CDk.2A deletion cohort than in the diploid and am.lification cohorts(18.8%[13/69]vs.35.0%[28/80]vs.51.8%[29/56],Punivariable com.eting risk.analysis,the cum.lative regression rate was statistically significantly lower(P=0.008),while the cum.lative progression rate was higher(P=0.017)in ESCdys patients with CDk.2A deletion than in those without CDk.2A ***2A deletion was also an independent predictor of prognosis in ESCdys(P=0.004)in the m.ltivariable ***:The results indicated that CDk.2A SCNVs are associated with the prognosis of ESCdys and m.y serve as potential biom.rk.rs for risk.stratification.

关键词： Som.tic copy num.er variations Esophageal squam.us cell carcinom. Esophageal neoplasm. Squam.us intraepithelial lesions DNA copy num.er variations Prognosis Prospective study