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Uniqueness on Difference Operators of Meromorphic Functions of Infinite Order

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Acta Mathematica Sinica,English Series 2024年第2期40卷 511-527页

作者： Hui LI Ming liang FANG Xiao YAO School of Science China University of Mining and TechnologyBeijing 100083P.R.China Institute of Mathematics Academy of Mathematics and System SciencesChinese Academy of SciencesBeijing 100190P.R.China School of Sciences Hangzhou Dianzi UniversityHangzhou 310012P.R.China School of Mathematical sciences and LPMc Nankai UniversityTianjin 300071P.R.China

We investigate the uniqueness problems of meromorphic functions and their difference operators by using a new *** is proved that if a non-constant meromorphic function f shares a non-zero constant and ∞ counting multiplicities with its difference operators Δcf(z) and Δ_(c)^(2)f(z), thenΔcf(z)≡Δ_(c)^(2)f(z).In particular,we give a difference analogue of a result of *** method has two distinct features:(ⅰ) It converts the relations between functions into the corresponding *** makes it possible to deal with the uniqueness problem by linear algebra and combinatorics.(ⅱ) It circumvents the obstacle of the difference logarithmic derivative lemma for meromorphic functions of infinite order,since this method does not depend on the growth of the ***,the idea in this paper can also be applied to the case for several variables.

关键词： Uniqueness meromorphic functions difference operators infinite order

A low-melting-point metal doping strategy for the synthesis of small-sized intermetallic Pt_(5)ce fuel cell catalysts

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Nano Research 2024年第9期17卷 8112-8118页

作者： Zi-Jun Zou Shi-Yi Yin Yao Tang Sheng-liang Zhong Lei Wang Shi-Long Xu Hai-Wei liang college of chemistry and chemical Engineering Jiangxi Normal UniversityNanchang 330022China Department of chemistry University of Science and Technology of ChinaHefei 230026China School of Materials and chemical Engineering Anhui Jianzhu UniversityHefei 230601China

carbon-supported platinum-lanthanum(Pt-Ln)intermetallic compound(IMc)nanoparticles with high activity and robust stability have been demonstrated as promising cathode catalysts for proton-exchange membrane fuel ***,the preparation of Pt-Ln IMc catalysts needs high-temperature annealing treatment that inevitably causes nanoparticle sintering,resulting in significant reduction of the electrochemical surface area and mass-based ***,we prepare small-sized M-doped Pt_(5)ce(M=Ga,cd,and Sb)IMcs catalysts via a low-melting-point metal doping *** speculate that the doping of low-melting-point metals can facilitate the generation of vacancies in the crystal lattice through thermal activation and thus reduce the kinetic barriers for the formation of intermetallic Pt_(5)ce *** prepared Ga-doped Pt_(5)ce catalyst exhibits a higher electrochemical active surface area(81 m^(2)·gPt^(-1))and a larger mass activity(0.45 A·mgPt^(-1)at 0.9 V)over the undoped Pt_(5)ce and commercial Pt/c *** the membrane electrode assembly test,the Ga-doped Pt_(5)ce cathode delivers a power density of 0.98 W·cm^(-2)at 0.67 V,along with a voltage loss of only 27 mV at 0.8 A·cm^(-2)at the end of accelerated stability test.

关键词： P5ce low-melting-point metal small-sized intermetallic compound catalysis fuel cells

Rainbow Pancyclicity in a collection of Graphs Under the Dirac-type condition

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Acta Mathematicae Applicatae Sinica 2024年第2期40卷 269-274页

作者： Lu-yi LI Ping LI Xue-liang LI center for combinatorics and LPMc Nankai UniversityTianjin 300071China School of Mathematics and Statistics Shaanxi Normal UniversityXi’an 710062China

Let G={Gi:i∈[n]} be a collection of not necessarily distinct n-vertex graphs with the same vertex set V,where G can be seen as an edge-colored(multi)graph and each Gi is the set of edges with color i.A graph F on V is called rainbow if any two edges of F come from different Gis’.We say that G is rainbow pancyclic if there is a rainbow cycle cℓof lengthℓin G for each integerℓ2[3,n].In 2020,Joos and Kim proved a rainbow version of Dirac’s theorem:Ifδ(Gi)≥2/n for each i∈[n],then there is a rainbow Hamiltonian cycle in *** this paper,under the same condition,we show that G is rainbow pancyclic except that n is even and G consists of n copies of Kn/2,n/*** result supports the famous meta-conjecture posed by Bondy.

关键词： rainbow Hamiltonian cycle rainbow pancyclic meta-conjecture

Interpolated Bumpless Transfer control for Asynchronously Switched Linear Systems

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IEEE/cAA Journal of Automatica Sinica 2024年第7期11卷 1579-1590页

作者： Shengao Lu Tong Wu Lixian Zhang Jianan Yang Ye liang the School of Astronautics Harbin Institute of TechnologyHarbin 150080China the Department of Electrical and computer Engineering National University of SingaporeSingapore 117583Singapore IEEE

This paper revisits the problem of bumpless transfer control(BTc) for discrete-time nondeterministic switched linear systems. The general case of asynchronous switching is considered for the first time in the field of BTc for switched systems. A new approach called interpolated bumpless transfer control(IBTc) is proposed, where the bumpless transfer controllers are formulated with the combination of the two adjacent modedependent controller gains, and are interpolated for finite steps once the switching is detected. In contrast with the existing approaches, IBTc does not necessarily run through the full interval of subsystems, as well as possesses the time-varying controller gains(with more flexibility and less conservatism) achieved from a control synthesis allowing for the stability and other performance of the whole switched system. Sufficient conditions ensuring stability and H_(∞) performance of the underlying system by IBTc are developed, and numerical examples verify the theoretical findings.

关键词： Asynchronous switching bumpless transfer H_∞control switched systems

Optimization on crystallization process of the magnetic core lysozyme

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Particuology 2024年第4期87卷 106-113页

作者： Lixia Hou chunxiao Qu Min Su Zhihan liang Qi Hao School of chemical Engineering Hebei University of TechnologyTianjin300130China

The continuous growth of the biomedical market highlights the significance of improvement in the ef-ficiency of batch production for protein drug ***,we investigated the effect of polymer-modified Fe_(3)O_(4) nanoparticles on lysozyme(Lys)crystallization at different conditions,using function-alized Fe_(3)O_(4) magnetic nanoparticles(Polymer c@Fe_(3)O_(4))as nucleation *** study revealed that the surface charge density of Polymer c@Fe_(3)O_(4) was highest at a modification mass ratio of Fe_(3)O_(4) to Polymer c is 8∶*** ratio facilitates the augmentation of electrostatic interaction and the promotion of *** adding 15%of the Polymerc@Fe_(3)O_(4) prepared from Fe_(3)O_(4) with an average particle size of 150 nm,the magnetic core lysozyme(M-Lys)crystals with an average particle size of 11.08μm,narrow size distribution,and regular morphology were obtained in a yield of 82.42%within 60 min.

关键词： Protein crystallization Magnetic particle Lysozyme

Therapeutic potential of targeting protein tyrosine phosphatases in liver diseases

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Acta Pharmaceutica Sinica B 2024年第8期14卷 3295-3311页

作者： Ao Wang Yi Zhang Xinting Lv Guang liang Department of Pharmacy and Institute of Inflammation Zhejiang Provincial Affiliated People’s HospitalHangzhou Medical CollegeHangzhou 310014China Key Laboratory of Natural Medicines of the changbai Mountain Ministry of EducationYanbian UniversityYanji 133002China chemical Biology Research center School of Pharmaceutical SciencesWenzhou Medical UniversityWenzhou 325035China

Protein tyrosine phosphorylation is a post-translational modification that regulates protein structure to modulate demic organisms’homeostasis and *** physiological process is regulated by two enzyme families,protein tyrosine kinases(PTKs)and protein tyrosine phosphatases(PTPs).As an important regulator of protein function,PTPs are indispensable for maintaining cell intrinsic physiology in different systems,as well as liver physiological and pathological *** of PTPs has been implicated in multiple liver-related diseases,including chronic liver diseases(cLDs),hepatocellular carcinoma(Hcc),and liver injury,and several PTPs are being studied as drug therapeutic ***,given the regulatory role of PTPs in diverse liver diseases,a collated review of their function and mechanism is ***,based on the current research status of targeted therapy,we emphasize the inclusion of several PTP members that are clinically significant in the development and progression of liver *** an emerging breakthrough direction in the treatment of liver diseases,this review summarizes the research status of PTP-targeting compounds in liver diseases to illustrate their potential in clinical ***,this review aims to support the development of novel PTP-based treatment pathways for liver diseases.

关键词： Tyrosine phosphorylation PTPs Signal transduction cLDs Hcc Allosteric inhibitor PROTAcs Drug development

NAP-seq: unveiling the hidden world of noncapped RNAs

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Science china Life Sciences 2024年

作者： liang liang Yuanchao Xue Key Laboratory of Epigenetic Regulation and Intervention Institute of Biophysics Chinese Academy of Sciences University of chinese Academy of Sciences

The human genome sequencing reveals that non-coding sequences can account for about 98% of the genome(Lander et al., 2001; Venter et al., 2001). comparative genomics studies indicate that the proportion of the non-coding sequence in a species is tightly correlated with the complexity of the species during evolution(Taft et al., 2007), highlighting the functionality of those non-coding sequences.

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Investigating the elliptic anisotropy of identified particles in p-Pb collisions with a multi-phase transport model

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Nuclear Science and Techniques 2024年第2期35卷 160-169页

作者： Si-Yu Tang liang Zheng Xiao-Ming Zhang Ren-Zhuo Wan School of Mathematical and Physical Sciences Wuhan Textile UniversityWuhan 430200China School of Mathematics and Physics China University of Geosciences(Wuhan)Wuhan 430074China Key Laboratory of Quark and Lepton Physics(MOE)and Institute of Particle Physics Central China Normal UniversityWuhan 430079China Hubei Key Laboratory of Digital Textile Equipment Wuhan Textile UniversityWuhan 430200China School of Electronic and Electrical Engineering Wuhan Textile UniversityWuhan 430200China

The elliptic azimuthal anisotropy coefficient(v_(2))of the identified particles at midrapidity(|η|<0.8)was investigated in p-Pb collisions at√s_(NN)=5.02 TeV using a multi-phase transport model(AMPT).The calculatio... 详细信息

The elliptic azimuthal anisotropy coefficient(v_(2))of the identified particles at midrapidity(|η|collisions at√s_(NN)=5.02 TeV using a multi-phase transport model(AMPT).The calculations of differential v_(2)based on the advanced flow extraction method of light flavor hadrons(pions,kaons,protons,andΛ)in small collision systems were extended to a wider transverse momentum(p_(T))range of up to 8 GeV/c for the first *** string-melting version of the AMPT model provides a good description of the measured p_(T)-differential v_(2)of the mesons but exhibits a slight deviation from the baryon v_(2).In addition,we observed the features of mass ordering at low p_(T)and the approximate number-of-constituentquark(NcQ)scaling at intermediate p_(T).Moreover,we demonstrate that hadronic rescattering does not have a significant impact on v_(2)in p-Pb collisions for different centrality selections,whereas partonic scattering dominates in generating the elliptic anisotropy of the final *** study provides further insight into the origin of collective-like behavior in small collision systems and has referential value for future measurements of azimuthal anisotropy.

关键词： Azimuthal anisotropy Small collision systems Transport model

Towards fast focal mechanism inversion of shallow crustal earthquakes in the chinese mainland

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Earthquake Research Advances 2024年第2期4卷 36-44页

作者： Zhigao Yang Tairan Xu Jianhong liang china Earthquake Networks center Beijing100045China

We have developed an automatic regional focal mechanism inversion system based on the Earthquake Rapid Report(ERR) system and the real-time three-component seismic waveform stream of 1 000 broadband seismic stations provided by the china Earthquake Networks center(cENc). The system can rapidly provide a double couple solution and centroid depth within 5–15 min after receiving earthquake information from the ERR *** data processing is triggered by earthquake information obtained from the ERR system. The system is capable of determining the focal mechanism of all shallow-depth earthquakes in the chinese mainland with a magnitude of 5.5–6.5. It utilizes waveform data recorded by seismic stations located within 500 km from the epicenter,enabling the reporting of a focal mechanism solution within 5–15 min of an earthquake occurrence. Additionally,the system can assign a corresponding grade(A B c) to the focal mechanism solution. We processed a total of 301earthquakes that occurred from 2021 to June 2022, and after the quality control, 166 of them were *** selected solutions were manually checked, and 160 of them were compiled in a focal mechanism *** catalog can be conveniently downloaded online via the Internet. The automatic focal mechanism solution of earthquakes in eastern china exhibits a good agreement with that provided by the Global centroid Moment Tensor(GcMT), when available. The average Kagan angle between this catalog and GcMT is 22°, and the average difference in MWis 0.17. Furthermore, compared with GcMT, the minimum magnitude of our catalog has been reduced from approximately 5.0 to 4.0. The correlation between the centroid depth and crustal thickness in the chinese mainland confirms the distribution of the centroid depth.

关键词： Automatic focal mechanism solution chinese mainland Moment magnitude centroid depth