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The Faber Operator Acting on BMOA,BMO-Teichmüller Space and Chord-arc Curves

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Acta Mathematica Sinica,English Series 2024年第10期40卷 2359-2387页

作者： Tai liang LIU yu liang shen Department of Mathematics Soochow UniversitySuzhou 215006P.R.China

After reviewing Grunsky operator and Faber operator acting on Dirichlet space,we discuss the boundedness of Faber operator on BMOA,a new subject which turns out to be closely related to the BMO theory of the universal Teichmüller *** particular,we show that the Faber operator acts as a bounded operator on BMOA if the symbol conformal map stays nearly to the base point in the BMO-Teichmüller ***,we obtain several results on quasiconformal mappings,BMOTeichm¨uller space and chord-arc curves as *** by-products,this provides a complex analysis approach to the boundedness of the Cauchy integral acting on BMO functions on a chord-arc curve near to the unit circle in the BMO-Teichmüller space.

关键词： Faber operator quasiconformal mapping quasicircle BMO-Teichmüller space chord-arc curve Grunsky operator BMO BMOA Carleson measure Cauchy integral

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On Grunsky operator

Science China Mathematics 2007年第12期50卷 1805-1817页

作者： yu-liang shen Department of Mathematics Suzhou University Suzhou 215006 China

We discuss the holomorphic dependance and the compactness of the Grunsky operator for a univalent function.

关键词： univalent function, quasiconformal mapping, Grunsky operator, compact operator,Hilbert-Schmidt operator

On Holomorphic Sections in Teichmiiller Spaces

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Acta Mathematica Sinica,English Series 2009年第12期25卷 2023-2034页

作者： Ming Feng SUN yu liang shen Department of Mathematics Soochow University Suzhou 215006 P. R. China

It is proved that, for any elementary torsion free Fuchsian group F, the natural projection from the Teichmiiller curve V（F） to the Teichmiiller space T（F） has no holomorphic section.

关键词： Teichmuller space Bers fiber space Teichmiiller curve holomorphic section punctureforgetting mapping

Distortion mapping correction in the AIMS primary mirror testing by a computer-generated hologram

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Research in Astronomy and Astrophysics 2021年第7期21卷 99-106页

作者： Ke-Wei E Jian-Ke Zhao Bo Wang Dong-Guang Wang yu-liang shen Xin Fu Song-Bo Xu Jing Li Xun Xue Ming Chang Yan Zhou Xi’an Institute of Optics and Precision Mechanics Chinese Academy of SciencesXi’an 710119China Nanjing Astronomical Instruments Chinese Academy of SciencesNanjing 210042China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China

The National Solar Observatory is currently developing the Accurate Infrared Magnetic Field Measurements of the Sun(AIMS). The primary mirror of the AIMS solar telescope is an off-axis parabolic with a diameter of 1 m and with a large off-axis amount of 1 m. Due to the surface figure of the primary mirror under the used state is directly related to image quality of the whole system, a computer-generated hologram(CGH) is carried out to test the primary mirror, and the test results are used to polish the mirror to a higher surface accuracy. However, the fact that the distortion exists in the testing results leads to the failure of a further guide to deterministic optical processing. In this paper, a distortion correction method is proposed, which uses an orthogonal set of vector polynomials to mapping the coordinates of the mirror and the pixels of fringes, and then an interpolation method is adopted to obtain the corrected results. The testing accuracy by using CGH is also verified by an auto-collimate test experiment. According to the distorted corrected results, the root-mean-square of the surface figure is about 1/50λ(λ=632.8 nm) after polishing.

关键词： telescopes techniques:interferometric methods:astronomical instrumentation methods and techniques

Notes on Univalent Functions with Quasiconforml Extensions

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Acta Mathematica Sinica,English Series 2001年第3期17卷 397-402页

作者： yu liang shen Department of Mathematics,Suzhou University,Suzhou 215006,P.R.China E-mail:ylshen@***

We make improvements to some of the constants concerned with univalent functions with quasiconformal extensions that have appeared in the literature.

关键词： Univalent function Quasiconformal mapping Quasicircle

Clinicopathological features of giant cell carcinoma of the pancreas

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Hepatobiliary & Pancreatic Diseases International 2004年第2期3卷 300-302页

作者： Xiao-Ping Zou, Zhi-liang yu, Zhao-shen Li and Guo-Zhong Zhou Shanghai, ChinaAuthor Affiliations : Department of Gastroenterology, Changhai Hospital, Second Military Medical University, Shanghai 200433, China Department of Gastroenterology Changhai Hospital Second Military Medical University Shanghai 200433 China. zxpfcp@***

BACKGROUND: Giant cell carcinoma of the pancreas (GCCP) as a tumor of high malignancy, large size, and inflammatory reaction occupies 2.1%-12.8% of all cases of pancreatic malignancies. This study was to analyze cases of GCCP collected in 8 years at our hospital in an attempt to describe some features of GCCP in Chinese people. METHODS: The clinicopathological features of 19 patients who had been pathologically diagnosed as having GCCP from 1021 patients with pancreatic malignancies collected by Pancreatic Disease Research Group (PDRG) of Chang- hai Hospital were retrospectively analyzed compared with those of 96 patients with common pancreatic carcinoma (PC) who were randomly selected from 1002 patients with pancreatic carcinoma. The differences of location, clinical symptoms, imagings, laboratory test, operation and the prognosis of these two groups were defined. RESULTS: Tumors in the head of the pancreas were found in 8 patients (42.1%), and those in the body or tail of the pancreas in 11 (57.9%). The initial symptom was abdomi- nal pain in most patients (57.9%). Abdominal pain (73.7%), dyspepsia (63.2%), weight loss (36.8%) but jaun- dice were common at the time of diagnosis. The abnormal rates of routine laboratory tests in the GCCP group were lower than those in the common PC group. The assay of tumor markers between the groups of GCCP and common PC was approximately the same. The sensitivity and accu- racy of ultrasonography, spiral computed tomography and magnetic resonance imaging were considerably high. Large carcinoma in stage was seen in 9 patients or 47.4% of the GCCP group, a rate higher than that in the common PC group. Osteoid formation was found microscopically in some patients, and poorly differentiated tumor cells were found in most patients. The 1-year survival rate was 17.6%, which was lower than that in the common PC group. CONCLUSION: The clinicopathological features of GCCP are different from those of common PC. Imaging tests can be used tog

关键词： pancreatic neoplasm pathology diagnosis stage classification prognosis

Morphology engineering of ZnO micro/nanostructures under mild conditions for optoelectronic application

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 498-503页

作者： liang Chu Haoyu shen Hudie Wei Hongyu Chen Guoqiang Ma Wensheng Yan Institute of Carbon Neutrality and New Energy&School of Electronics and Information Hangzhou Dianzi UniversityHangzhou 310018China School of Applied Physics and Materials Wuyi UniversityJiangmen 529020China

Zinc oxide(ZnO)serves as a crucial functional semiconductor with a wide direct bandgap of approximately 3.37 *** reaction is commonly used in the synthesis of ZnO micro/nanostructures,given its low cost,simplicity,and easy ***,ZnO morphology engineering has become desirable through the alteration of minor conditions in the reaction process,particularly at room *** this work,ZnO micro/nanostructures were synthesized in a solution by varying the amounts of the ammonia added at low temperatures(including room temperature).The formation of Zn^(2+)complexes by ammonia in the precursor regulated the reaction rate of the morphology engineering of ZnO,which resulted in various structures,such as nanoparticles,nanosheets,microflowers,and single ***,the obtained ZnO was used in the optoelectronic application of ultraviolet detectors.

关键词： morphology engineering low temperature ZnO nanosheets microflowers ultraviolet detector

Proteomic Study on Ectomycorrhizal Fungus Boletus edulis under Salt Stress

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Proteomic Study on Ectomycorrhizal Fungus Boletus edulis und...

Proteomic analysis of rice seedlings under stresses

首届全国蛋白质组学学术研讨会

作者： yu liang, Shi-Hua shen (Key Laboratory of Photosynthesis and Environmental Molecular Physiology, Institute of Botany, CAS, Beijing, P. R. China, 100093)

Mycorrhiza is defined as a mutualistic symbiosis between plants and fungi localized in roots or root-like structures in which energy moves primarily from plants to fungi and inorganic resources move from fungi to plants. Since most land plants in the world belong to families that are commonly mycorrhizal, mycorrhizal fungi may play important roles in terrestrial ecosystems. Ectomycorrhizal fungi, a main kind of mycorrhizal fungi, form symbiotic structures on roots of many trees. ECM fungi could enhance host growth and improve the adaptability of host trees to stressed environments, and the stress resistance of ectomycorrhizal fungi could decide, to some extent, the settlement and survival of their host trees in those areas. Salt stress has become a key limit factor of foresting in some area near seashore or some arid *** edulis is a common ectomycorrhizal fungal species widely distrusted in forests of China. Mycelia of B. edulis were first grown for one week in a potato-dextrose medium, and then treated with 680mM NaCl. After salt treated for two hours, total protein was extract from fungal mycelia, and isolated using 2D-E. Over 500 reproducible protein spots were detected and 47 protein spots were found up- or down- regulated in the salt stressed mycelia. The changed proteins were under identification using MALDI-TOF and Q-TOF. We hope it would be helpful in better understanding the adaptation mechanisms of ectomycorrhizal fungi under stresses.

关键词： Mycorrhiza Boletus edulis Salt stress Proteomics

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Proteomic analysis of rice seedlings under stresses