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Dual Toeplitz Operators on the Orthogonal Complement of the Harmonic Bergman Space

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Acta Mathematica Sinica,English Series 2021年第7期37卷 1143-1155页

作者： Yang peng xian Feng ZHAO Cancer Center Daping HospitalArmy Medical University(Third Military Medical University)Chongqing 400038P.R.China College of Mathematics and Statistics Chongqing UniversityChongqing 401331P.R.China

In this paper,we characterize that the boundedness,compactness and spectral structure of dual Toeplitz operators acting on the orthogonal complement of the harmonic Bergman *** generalizes the corresponding results for dual Toeplitz operators on the orthogonal complement of the Bergman space due to Stroethoff and Zheng’s paper[***.,354,2495–2520(2002)].

关键词： Dual Toeplitz operator harmonic Bergman space

Dynamic Recrystallization Behavior and Processing Map Development of 25CrMo4 Mirror Plate Steel During Hot Deformation

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Acta Metallurgica Sinica(English Letters) 2017年第9期30卷 907-920页

作者： peng Zhou Qing.xian Ma Department of Mechanical Engineering TsinghuaUniversityBeijing 100084China Key Laboratory for Advanced Materials ProcessingTechnology of Ministry of Education Tsinghua University Beijing 100084China

The dynamic recrystallization behavior of 25CrMo4 steel was systematically investigated by compression deformation at different temperatures and strain rates on a Gleeble 1500 thermal mechanical simulation tester. The flow curves under different deformation conditions were obtained, and the effects of deformation temperature and strain rate on the appearance of the flow curves were discussed. Based on the experimental flow curves, the activation energy determined by regression analysis was Q = 337 kJ/mol, and the constitutive model was constructed. All the characteristic points of the flow curves were identified from the work hardening rate curves （θ= dσ/dε vs σ）, which were derived from the flow curves. Then, the kinetics model of dynamic recrystallization was determined by combining the Avrami equation with the stress loss resulted from the dynamic recrystallization. With the aid of the kinetics model, the effect of strain on the efficiency of power dissipation was discussed. Furthermore, the optimum parameters for the forging process were determined based on the processing maps.

关键词： 25CrMo4 steel Dynamic recrystallization Kinetics model Processing map

;unctional metabolomics： from biomarker ：liscovery to metabolome reprogramming

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Protein & Cell 2015年第9期6卷 628-637页

作者： Bo peng Hui Li Xuan-xian peng Center for Proteomics and Metabolomics State Key Laboratory of Biocontrol School of Life Sciences MOE Key Lab Aquat Food Safety School of Life Sciences Sun Yat-sen University Guangzhou 510275 China Molecular Foundry Lawrence Berkeley National Laboratory Berkeley CA 94720 USA

Metabolomics is emerging as a powerful tool for studying metabolic processes, identifying crucial biomarkers responsible for metabolic characteristics and revealing metabolic mechanisms, which construct the content of discovery metabolomics. The crucial biomarkers can be used to reprogram a metabolome, leading to an aimed metabolic strategy to cope with alteration of internal and external environments, naming reprogramming metabo- Iomics here. The striking feature on the similarity of the basic metabolic pathways and components among vastly different species makes the reprogramming metabolomics possible when the engineered metabolites play biological roles in cellular activity as a substrate of enzymes and a regulator to other molecules including proteins. The reprogramming metabolomics approach can be used to clarify metabolic mechanisms of responding to changed internal and external environmental factors and to estab- lish a framework to develop targeted tools for dealing with the changes such as controlling and/or preventing infec- tion with pathogens and enhancing host immunity against pathogens. This review introduces the current state and trends of discovery metabolomics and reprogramming metabolomics and highlights the importance of repro- gramming metabolomics.

关键词： reprogrammingregulationmetabolomics discovery metabolomicsmetabolomics metabolic strategy metabolic

Structure Effect of Squarylium Cyanine Dyes on Third-Order Optical Nonlinearities in Ground and Excited States

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Chinese Physics Letters 1999年第8期16卷 571-573页

作者： IU Xu-chun XU Gang SI jin-hai YE Pei-xian LIN Tong peng Bi-xian Institute of Physics and Center for Condensed Matter Physics Chinese Academy of SciencesBeijing 100080 Institute of Photographic Chemistry Chinese Academy of SciencesBeijing 100101

A series of squarylium cyanine dyes with different substituents were synthesized and the third-order optical nonlinearities of their ground and excited states were investigated by backward degenerate *** the ground state,the molecular hyperpolarizabilityγg increases with the red-shift of the absorption peakλabmax,of the squaraine with different substituents,whereas for the excited-state molecular hyperpolarizabilityγe,the nonlinear enhancementγe/γg decreases,which may indicate that in the excited state the electron accepting-donating ability of different substituents changes in the reverse order compared with the order in the ground state.

关键词： state excited substituent

An important step towards commercialization of quantum-dot light-emitting diode displays

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Science China Chemistry 2017年第10期60卷 1324-1325页

作者： Yizheng jin Xiaogang peng Center for Chemistry of Novel and High-Performance Materials. Department of Chemistry Zhejiang University flangzhou 310027 China

Colloidal quantum dots(QDs)are a unique class of emissive materials with size-tunable emission wavelengths,saturated emission colors,near-unity luminance efficiency,inherent photo-and thermal-stability,and excellent solution *** based on quantum-dot light-emitting diodes(QLED)may combine the superior properties of QDs,the benefits of solution-based fabrication techniques,and the advantages of self-emission devices,which promises an unprecedented generation of cost-effective,large-area,energysaving,wide-color-gamut,ultra-thin and flexible displays.

关键词： tunable unprecedented fabrication saturated colors inherent combine benefits dissolution attractive

The intra-neuroendoscopic technique: a new method for rapid removal of acute severe intraventricular hematoma

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Neural Regeneration Research 2018年第6期13卷 999-1006页

作者： Bo Du Ai-Jun Shan Yu-Juan Zhang jin Wang Kai-Wen peng xian-Liang Zhong Yu-Ping peng Department of Neurosurgery Nanfang Hospital Southern Medical University Department of Emergency Medicine Shenzhen People's Hospital The Second Affiliated Hospital of Jinan University

The mortality rate of acute severe intraventricular hematoma is extremely high, and the rate of disability in survivors is high. Intraventricular hematoma has always been a difficult problem for clinical treatment. Although minimally invasive endoscopic hematoma evacuation is widely used to treat this disease, the technique still has room for improvement. Equipment for the intra-neuroendoscopic technique（INET） consists of two of our patented inventions： a transparent sheath（Patent No. ZL 200820046232.0） and a hematoma aspirator（Patent No. ZL 201520248717.8）. This study explored the safety and efficacy of INET by comparing it with extraventricular drainage in combination with urokinase thrombolytic therapy. This trial recruited 65 patients with severe intraventricular hemorrhage, including 35（19 men and 16 women, aged 53.2 ± 8.7 years） in the INET group and 30（17 men and 13 women, aged 51.5 ± 7.9 years） in the control group（extraventricular drainage plus urokinase thrombolytic therapy）. Our results showed that compared with the control group, the INET group exhibited lower intraventricular hemorrhage volumes, shorter intensive care-unit monitoring and ventricular drainage-tube placement times, and fewer incidences of intracranial infection, secondary bleeding, and mortality. Thus, the prognosis of survivors had improved remarkably. These findings indicate that INET is a safe and efficient new method for treating severe intraventricular hematoma. This trial was registered with Clinical ***（NCT02515903）.

关键词： nerve regeneration ventricular hemorrhage transparent sheath extraventricular drainage minimally invasive surgery intra-neuroendoscopic technique urokinase thrombolysis prognosis neural regeneration

Constructing p, n-forms from p-forms via the Hodge star operator and the exterior derivative

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Communications in Theoretical Physics 2020年第6期72卷 97-105页

作者： Jun-jin peng School of Physics and Electronic Science Guizhou Normal UniversityGuiyangGuizhou 550001China Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing Guizhou Normal UniversityGuiyangGuizhou 550001China

In this paper,we aim to explore the properties and applications on the operators consisting of the Hodge star operator together with the exterior derivative,whose action on an arbitrary p-form field in n-dimensional spacetimes makes its form degree remain *** operations are able to generate a variety of p-forms with the even-order derivatives of the *** do this,we first investigate the properties of the operators,such as the Laplace–de Rham operator,the codifferential and their combinations,as well as the applications of the operators in the construction of conserved *** the basis of two general p-forms,then we construct a general n-form with higher-order ***,we propose that such an n-form could be applied to define a generalized Lagrangian with respect to a p-form field according to the fact that it includes the ordinary Lagrangians for the p-form and scalar fields as special cases.

关键词： p-form Hodge star Laplace–Beltrami operator Lagrangian for p-form

Two Labdane Diterpenes from Leonurus heterophyllus

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Chinese Chemical Letters 2006年第10期17卷 1321-1324页

作者： xian ZHANG Guo Ping peng School of Pharmacy Shanghai University of Traditional Chinese Medicine Shanghai 201203 Botanical Refinement Engineering Research Center Nanjing University-of Traditional Chinese Medicine Nanjing 210029

Two new labdane diterpenoids named heteronone A （1） and heteronone B （2） were isolated from the aerial parts of Leonurus heterophyllus Sweet. Their structures were established by various spectroscopic means, and t... 详细信息

关键词： Labdane diterpenes leonurus heterophyllus Sweet. X-ray diffraction analysis

On Strong Embeddability and Finite Decomposition Complexity

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Acta Mathematica Sinica,English Series 2017年第3期33卷 403-418页

作者： Jun XIA xian jin WANG College of Mathematics and Statistics Chongqing University Chongqing 401331 P. R. China

The strong embeddability is a notion of metric geometry, which is an intermediate property lying between coarse embeddability and property A. In this paper, we study the permanence properties of strong embeddability for metric spaces. We show that strong embeddability is coarsely invariant and it is closed under taking subspaces, direct products, direct limits and finite unions. Furthermore, we show that a metric space is strongly embeddable if and only if it has weak finite decomposition complexity with respect to strong embeddability.

关键词： Metric geometry strong embeddability coarse invariance permanence properties finitedecomposition complexity