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World Journal of Pediatrics 2022年第3期18卷 230-233页

作者： Rui-Mu Zhang kun Tan Shu Fu Ji-Kui deng Department of Infectious Diseases Shenzhen Children’s HospitalShenzhen 518038China

Procalcitonin(PCT),C-reactive protein(CRP),and white blood cell(WBC)have been used as markers of bacterial infection in children for *** studies have suggested PCT,CRP,WBC,and percentage of neutrophils(%N)may be useful in detecting bacterial infection in children[1-4].However,elevated levels of these biomarkers have also been noted in children with enterovirus infection[5-7].In a study involving 5692 hospitalized children with herpangina or hand,foot,and mouth disease(HFMD)in two periods of years,the medians of CRP were 50.1 and 42.5 mg/L,respectively.

关键词： enterovirus infection elevated

Estimates for Correlations in Billiards with Large Arcs

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Acta Mathematicae Applicatae Sinica 2011年第3期27卷 381-392页

作者： Hong-kun Zhang Department of Mathematics & Statistics University of Massachusetts Amherst MA 01003 USA

Bunimovich billiards are ergodic and mixing. However, if the billiard table contains very large arcs on its boundary then if there exist trajectories experience infinitely many collisions in the vicinity of periodic trajectories on the large arc. The hyperbolicity is nonuniform and the mixing rate is very slow. The corresponding dynamics are intermittent between regular and chaotic, which makes them particularly interesting in physical studies. The study of mixing rates in intermittent chaotic systems is more difficult than that of truly chaotic ones, and the resulting estimates may depend on delicate details of the dynamics in the traps. We present a rigorous analysis of the corresponding singularities and correlations to certain class of billiards and show the mixing rate is of order 1/n.

关键词： billiards decay of correlations mixing rates

Area-preserving mean curvature flow of rotationally symmetric hypersurfaces with free boundaries

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Science China Mathematics 2016年第3期59卷 493-502页

作者： WANG kun Bo Department of Mathematics Zhejiang University

We consider the area-preserving mean curvature flow with free Neumann boundaries. We show that a rotationally symmetric n-dimensional hypersurface in R^(n+1)between two parallel hyperplanes will converge to a cylinder with the same area under this flow. We use the geometric properties and the maximal principle to obtain gradient and curvature estimates, leading to long-time existence of the flow and convergence to a constant mean curvature surface.

关键词： area-preserving mean curvature flow symmetric hypersurfaces free boundary

New ommatids of Ommatinae(Coleoptera:Archostemata:Ommatidae)from the Yixian Formation of western Liaoning,China

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Progress in Natural Science:Materials International 2007年第7期17卷 803-811页

作者： Shih Chung kun Beijing 100037 Capital Normal University China Key Laboratory of Insect Evolution & Environment Change College of Life Science

Four new fossil species of the family Ommatidae from the Yixian Formation of western Liaoning,China are described. Two of them belong to tribe Brochocoleini:Brochocoleus sulcatus *** Brochocoleus angustus *** other two refer to tribe Ommatini:Cionocoleus planiusculus *** Cionocoleus cervicalis *** diagnosis of Brochocoleus and Cionocoleus, respectively,are revised.A preliminary analysis of geographical distribution suggests a possible migration pathway of the genus Bro- *** relationship between the genus Cionocoleus and the extant family Crowsoniellidae is briefly discussed.

关键词： Ommatidae Brochocoleus Cionocoleus new species Yixian Formation

A survey of heavy–heavy hadronic molecules

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Communications in Theoretical Physics 2021年第12期73卷 86-104页

作者： Xiang-kun Dong Feng-kun Guo Bing-Song Zou CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China School of Physics Central South UniversityChangsha 410083China

The spectrum of hadronic molecules composed of heavy-antiheavy charmed hadrons has been obtained in our previous *** potentials are constants at the leading order,which are estimated from resonance *** experimental candidates of hadronic molecules,say X(3872),Y(4260),three P_(c)states and P_(cs)(4459),fit the spectrum *** success in describing the pattern of heavy-antiheavy hadronic molecules stimulates us to give more predictions for the heavy-heavy cases,which are less discussed in literature than the heavy-antiheavy *** that the heavy-antiheavy hadronic molecules,several of which have strong experimental evidence,emerge from the dominant constant interaction from resonance saturation,we find that the existence of many heavy-heavy hadronic molecules is *** these predicted heavy-heavy states we highlight the DD;molecule and the D^(*)∑_(c)^(*)molecules,which are the partners of the famous X(3872)and Pc *** recently,LHCb collaboration reported a doubly charmed tetraquark state,T_(cc),which is in line with our results for the DD^(*)*** the first experimental signal of this new kind of exotic states,the upcoming update of the LHCb experiment as well as other experiments will provide more chances of observing the heavy-heavy hadronic molecules.

关键词： hadronic molecules heavy-heavy systems Bethe-Salpeter equation constant interaction resonance saturation

Spatial variability of soil chemical properties of Moso bamboo forests of China

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Journal of Forestry Research 2021年第6期32卷 2599-2608页

作者： Regassa Terefe kun-yong Yu Yangbo deng Xiong Yao Fan Wang Jian Liu University Key Laboratory of Technology and Optimize Resource Utilization in Fujian Province Fuzhou350002FujianPeople’s Republic of China College of Forestry Fujian Agriculture and Forestry UniversityFuzhou350002People’s Republic of China Bako Agriculture Research Center Oromia Agriculture Research InstitutesP.O.Box03BakoOromiaEthiopia

This study investigates the spatial variability of soil organic matter(SOM),soil organic carbon(SOC)and pH in the upper 20-cm layer and 20-40 cm layer in Moso bamboo(Phyllostachys pubescens Pradelle)forests using a geostatistics *** maps of SOM,SOC,and pH were developed using ordinary kriging(OK)and inverse distance weighted(IDW)*** pH,SOC,and SOM of the two soil layers ranged from 4.6 to 4.7,from 1.5 to 2.7 g kg^(-1)and from 20.3 to 22.4 g kg^(-1),*** coefficient of variation for SOM and SOC was 29.9-43.3%while a weak variability was found for *** and exponential models performed well in describing the spatial variability of SOC contents with R^(2)varying from 0.95 to *** nugget/sill values of pH are less than 25%,which indicates a strong spatial correlation,while the nugget/sill values of SOC and SOM fall under moderate spatial *** using ordinary kriging and inverse distance weighted methods revealed that the spatial distribution of SOM,SOC,and pH was inconsistent due to external and internal factors across the *** the cross-validation results,the ordinary kriging method performed better than inverse distance weighted method for selected soil *** study suggests that the spatial variability of soil chemical properties revealed by geostatistics modeling will help decision-makers improve the management of soil properties.

关键词： Cross-validation Geostatistics Inverse distance weighted Ordinary kriging Semi-variance

A Pull Back Theorem in the Adams Spectral Sequence

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Acta Mathematica Sinica,English Series 2008年第3期24卷 471-490页

作者： Jin kun LIN School of Mathematical Science and LPMC Nankai University Tianjin 300071 P. R. China

This paper proves that, for any generator x∈ExtA^s,tq（Zp,Zp）, if （1L ∧i）＊Ф＊（x）∈ExtA^s＋1,tq＋2q（H＊L∧M, Zp） is a permanent cycle in the Adams spectral sequence （ASS）, then b0x ∈ExtA^s＋1,tq＋q（Zp, Zp） also is a permenent cycle in the ASS. As an application, the paper obtains that h0hnhm∈ExtA^3,pnq＋p^mq＋q（Zp, Zp） is a permanent cycle in the ASS and it converges to elements of order p in the stable homotopy groups of spheres πp^nq＋p^mq＋q-3S, where p ≥5 is a prime, s ≤ 4, n ≥m＋2≥4 and M is the Moore spectrum.

关键词： Adams spectral sequence Toda spectrum stable homotopy groups of spheres

Influence of Sox protein SUMOylation on neural development and regeneration

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Neural Regeneration Research 2022年第3期17卷 477-481页

作者： kun-Che Chang Department of Ophthalmology Louis J.Fox Center for Vision RestorationUniversity of Pittsburgh School of MedicinePittsburghPAUSA

SRY-related HMG-box(Sox) transcription factors are known to regulate central nervous system development and are involved in several neurological ***-translational modification of Sox proteins is known to alter their functions in the central nervous *** the different types of post-translational modification,small ubiquitin-like modifier(SUMO) modification of Sox proteins has been shown to modify their transcriptional ***,we review the mechanisms of three Sox proteins in neuronal development and disease,along with their transcriptional changes under *** three species,lysine is the conserved residue for *** Drosophila,SUMOylation of Sox N plays a repressive role in transcriptional activity,which impairs central nervous system ***,de SUMOylation of Sox E and Sox11 plays neuroprotective roles,which promote neural crest precursor formation in Xenopus and retinal ganglion cell differentiation as well as axon regeneration in the *** further discuss a potential translational therapy by SUMO site modification using AAV gene transduction and Clustered regularly interspaced short palindromic repeats-Cas9 *** the underlying mechanisms of Sox SUMOylation,especially in the rodent system,may provide a therapeutic strategy to address issues associated with neuronal development and neurodegeneration.

关键词： axon regeneration neural development neurological disorder neuroprotection post-translational modification small ubiquitin-like modifier Sox transcription factor SUMOylation

Generalized Derivations with Periodic Values

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Algebra Colloquium 2015年第1期22卷 163-168页

作者： kun-Shan Liu Department of Mathematics National Taiwan University Taipei 106 Taiwan

Let R be a prime ring and n 〉 1 be a fixed positive integer. If g is a nonzero generalized derivation of R such that g（x）n = g（x） for all x ∈ R, then R is commutative except when R is a subring of the 2 × 2 matrix ring over a field. Moreover, we generalize the result to the case g（f（xi））n = g（f（xi）） for all xl,x2,...,xt ∈ R, where f（Xi） is a multilinear polynomial.

关键词： prime ring PI GPI (generalized) derivation

Enhanced separation of Pd(Ⅱ)and Pt(Ⅳ)from hydrochloric acid aqueous solution using 2-((2-methoxyethyl)thio)-1H-benzimidazole

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Rare Metals 2020年第12期39卷 1473-1482页

作者： Shao-Ping Feng kun Huang School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China Department of Chemistry College of ScienceHonghe UniversityMengzi 661199China

Separation of palladium(Pd)and platinum(Pt)by solvent extraction is difficult because of their extremely similar physicochemical *** of new extractants with a high extraction efficiency and excellent separation selectivity is the primary focus for enhancing the separation of Pd and Pt by solvent *** this study,a new extractant,2-((2-methoxyethyl)thio)-1 H-benzimidazole(MOBI),which contains N,S,and O atoms,was synthesized and used to separate Pd(Ⅱ)and Pt(Ⅳ)from a hydrochloric acid aqueous *** experimental results revealed that Pd(Ⅱ)and Pt(Ⅳ)were effectively separated under the optimal conditions:MOB I concentration of 0.005 mol·L^(-1),HCl concentration of0.2 mol·L^(-1),organic/aqueous(O/A)phase ratio of 1.0,and contact time of 15 *** separation coefficient between Pd(Ⅱ)and Pt(Ⅳ)was 1246.40,which indicates that MOBI has a higher selectivity for Pd(Ⅱ)than Pt(Ⅳ).In addition,the mechanism of coordination between Pd(Ⅱ)and MOBI was demonstrated through the slope method,Fourier transform infrared spectroscopy(FTIR),hydrogen-1 nuclear magnetic resonance spectroscopy(^(1)H NMR),and carbon-13 nuclear magnetic resonance spectroscopy(^(13)C NMR).The results revealed that MOBI could coordinate with Pd(Ⅱ)via the N atom in the benzimidazole ring of MOBI molecules to form[Pd(MOBI)_(2)Cl_(2)](O).

关键词： 2-((2-methoxyethyl)thio)-1H-benzimidazole Palladium Platinum Extraction Separation