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On Lawson's Area-minimizing Hypercones

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Acta Mathematica Sinica,English Series 2016年第12期32卷 1465-1476页

作者： yong sheng zhang School of Mathematics and Statistics Northeast Normal University

We show the area-minimality property of all homogeneous area-minimizing hypercones in Euclidean spaces （classified by Lawlor） following Lawson＇s original idea in his 72＇ Trans. A.M.S. paper ＂The equivariant Plateau problem and interior regularity＂. Moreover, each of them enjoys （coflat） calibrations singular only at the origin.

关键词： Area-minimizing hypercone coflat calibration comass

Two-Dimensional Quantum Walk with Non-Hermitian Skin Effects

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Chinese Physics Letters 2021年第3期38卷 1-6页

作者： Tianyu Li yong-sheng zhang Wei Yi CAS Key Laboratory of Quantum Information University of Science and Technology of ChinaHefei 230026China CAS Center For Excellence in Quantum Information and Quantum Physics Hefei 230026China

We construct a two-dimensional, discrete-time quantum walk, exhibiting non-Hermitian skin effects under openboundary conditions. As a confirmation of the non-Hermitian bulk-boundary correspondence, we show that the emergence of topological edge states is consistent with the Floquet winding number, calculated using a non-Bloch band theory, invoking time-dependent generalized Brillouin zones. Further, the non-Bloch topological invariants associated with quasienergy bands are captured by a non-Hermitian local Chern marker in real space, defined via the local biorthogonal eigenwave functions of a non-unitary Floquet operator. Our work aims to stimulate further studies of non-Hermitian Floquet topological phases where skin effects play a key role.

关键词： topological boundary unitary

Oncogenic osteomalacia caused by a phosphaturic mesenchymal tumor of the femur: A case report

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World Journal of Clinical Cases 2019年第15期7卷 2081-2086页

作者： Dong Tang Xiao-Man Wang yong-sheng zhang Xiao-Xiao Mi Department of Medical Imaging(Radiology) The Affiliated Hospital of Hangzhou Normal UniversityHangzhou 310015Zhejiang ProvinceChina Department of Ultrasound The Affiliated Hospital of Hangzhou Normal UniversityHangzhou 310015Zhejiang ProvinceChina Department of Radiology Hangzhou Hospital of Traditional MedicineHangzhou 310015Zhejiang ProvinceChina Department of Radiology The Second Affiliated Hospital of Zhejiang Chinese Medical UniversityHangzhou 310015Zhejiang ProvinceChina Institute of Translational Medicine The Affiliated Hospital of Hangzhou Normal UniversityHangzhou 310015Zhejiang ProvinceChina

BACKGROUND Oncogenic osteomalacia caused by phosphaturic mesenchymal tumors is very difficult to *** report a case of tumor-induced osteomalacia caused by a phosphaturic mesenchymal tumor of the left femur in a middle-aged woman after medical imaging and *** SUMMARY A 57-year-old woman presented with progressive bone pain for five *** was diagnosed with hypophosphatemic osteomalacia,as her laboratory data showed low serum phosphorus and low serum *** knee joint radiography revealed an osteolytic lesion of the left femur.A computed tomography scan showed mixed density shadows in the left *** resonance imaging of the left femur showed the presence of an oval area with a hypointense signal in T1-weighted magnetic resonance imaging(MRI)and highlow mixed signal in T2-weighted *** samples revealed the presence of short spindle cells,vascularization,and characteristics of phosphaturic mesenchymal *** resection was performed,and the clinical presentations and laboratory abnormalities were *** Diagnosis of oncogenic osteomalacia is difficult due to the varieties and localization of source tumors and absence of pathognomonic biomedical *** case highlights the importance of a combination of medical imaging and biopsy in the diagnosis of oncogenic osteomalacia caused by a phosphaturic mesenchymal tumor.

关键词： Oncogenic osteomalacia Phosphaturic mesenchymal tumor Hypophosphatemia Hypocalcemia Case report

Expression of Embryonic Stem Cell Marker Oct-4 and Its Prognostic Significance in Rectal Adenocarcinoma

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Chinese Journal of Cancer Research 2010年第2期22卷 106-111页

作者： Chun-gen Xing Xue-guan Lu yong-sheng zhang Fang Zhou Xiao-ping Xu Department of General Surgery Second Affiliated Hospital of Soochow University Suzhou 215004 China Department of Radiation Oncology Second Affiliated Hospital of Soochow University Suzhou 215004 China Department of Pathology Second Affiliated Hospital of Soochow University Suzhou 215004 China

Objective： Recent evidence suggests that Oct-4 is highly expressed in several cancers, and its expression contributes to tumor growth. In this study, we investigated the level of Oct-4 expression in rectal adenocarcinoma, and evaluated the prognostic significance of Oct-4 expression in these cases. Methods： The immunohistochemical expression of Oct-4 was evaluated in 52 formalin-fixed paraffin-embedded postoperative rectal adenocarcinoma tissue samples. The impact of the immunoreactivity of Oct-4 in regard to clinical outcome was determined by Kaplan-Meier and log-rank. Results： The expression level of Oct-4 ranged from 0 to 18.5%. There was no significant association between Oct-4 expression and gender （P=0.772）, age （P=0.123）, clinical stage （P=0.391）, and histological grade （P=0.056）. The 3-year local recurrence-free rates with negative and positive expression of Oct-4 were 83.5% and 75.0%, respectively （P=0.583）. The 3-year metastasis-free rates with negative and positive expression of Oct-4 were 88.6% and 61.9%, respectively （P=0.035）. The 3-year overall survival rates with negative and positive expression of Oct-4 were 77.9% and 49.0%, respectively （P=0.037）. Conclusion： The results suggest that embryonic stem cell marker Oct-4 expression may have prognostic significance in patients with rectal adenocarcinoma. However, to confirm this more and larger studies are required.

关键词： Rectum Adenocarcinoma Oct-4 Stem ceil Prognosis

A new free recoverable and reusable mono-alkaloid-type ligand and its use in preparation of ethyl(2R,3S)-2,3-dihydroxy-3-phenylpropionate

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Chinese Chemical Letters 2009年第7期20卷 763-766页

作者： Qiao Feng Wang Hui Chen Yan Zhao Xiao Ye Li sheng yong zhang Research Center of Chirotechnology Fourth Military Medical University Xi'an 710032 PR China

A new free recoverable and reusable mono-alkaloid-type ligand has been synthesized by a simple method. With highly polar groups, the ligand can be recycled and reused eight times to prepare ethyl （2R,3S）-2,3-dihydroxy-3-phenylpropionate with high yield and ee via asymmetric dihydroxylation （AD） reaction. C 2009 sheng yong zhang. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.

关键词： Cinchona alkaloid Recoverable and reusable ligand Ethyl (2R,3S)-2,3-dihydroxy-3-phenylpropionate

Direct Strong Measurement of a High-Dimensional Quantum State

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Chinese Physics Letters 2020年第8期37卷 7-11页

作者： Chen-Rui zhang Meng-Jun Hu Guo-yong Xiang yong-sheng zhang Chuan-Feng Li and Guang-Can Guo CAS Key Laboratory of Quantum Information University of Science and Technology of ChinaHefei 230026China CAS Center For Excellence in Quantum Information and Quantum Physics Hefei 230026China

It is of great importance to determine an unknown quantum state for fundamental studies of quantum mechanics,yet it is still difficult to characterize systems of large dimensions in *** the scan-free direct measurement approach based on a weak measurement scheme was proposed to measure a high-dimensional photonic state,how weak the interaction should be to give a correct estimation remains *** we propose and experimentally demonstrate a technique that measures a high-dimensional quantum state with the combination of scan-free measurement and direct strong *** procedure involves sequential strong measurement,in which case no approximation is made similarly to the conventional direct weak *** use this method to measure a transverse state of a photon with effective dimensionality of 65000 without the time-consumed scanning ***,the high fidelity of the result and the simplicity of the experimental apparatus show that our approach can be readily used to measure the complex field of a beam in diverse applications such as wavefront sensing and quantitative phase imaging.

关键词： process. quantum simplicity

Digital holographic imaging via direct quantum wavefunction reconstruction

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Chinese Physics B 2023年第10期32卷 50-57页

作者：胡孟军张永生 Beijing Academy of Quantum Information Sciences Beijing 100193China Laboratory of Quantum Information University of Science and Technology of ChinaHefei 230026China Synergetic Innovation Center of Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei 230026China Hefei National Laboratory University of Science and Technology of ChinaHefei 230088China

Wavefunction is a fundamental concept of quantum *** studies have shown surprisingly that wavefunction can be directly reconstructed via the measurement of weak *** weak value based direct wavefunction reconstruction not only gives the operational meaning of wavefunction,but also provides the possibility of realizing holographic imaging with a totally new quantum ***,we review the basic background knowledge of weak value based direct wavefunction reconstruction combined with recent experimental *** main purpose of this work focuses on the idea of holographic imaging via direct wavefunction *** research on this topic is still in its early stage,we hope that this work can attract interest in the field of traditional holographic *** addition,the wavefunction holographic imaging may find important applications in quantum information science.

关键词： wavefunction reconstruction weak value hologram imaging

One-pot-synthesis of novel cinchonine-based phosphites

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Chinese Chemical Letters 2009年第7期20卷 797-799页

作者： Qiao Feng Wang Xue Ying Liu Xiang Yang Qin Xiao Ye Li sheng yong zhang Department of Chemistry Fourth Military Medical University Xi'an 710032 China

Cinchonine was employed as backbone for the synthesis of novel phosphite compounds with diol substituents. These monophosphinites were provided in one pot with the yields ranged from 63% to 75%. Their structures were confirmed by NMR spectroscopy and HRMS. C 2009 sheng yong zhang. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.

关键词： Cinchona alkaloids Diols Chiral phosphite Asymmetric reaction Ligand

Spiramide, a New Diterpene Amide from the Roots of Spiraea japonica var. acuta

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Chinese Chemical Letters 2000年第9期11卷 789-792页

作者： Yue Mao SHEN Hong Ping HE yong sheng zhang Bin Gui WANG Xiao Jiang HAO Laboratory of Phytochemistry Kunming Institute of BotanyChinese Academy of SciencesKunming 650204 Department of Plant Biotechnology Kunming Institute of BotanyChinese Academy of SciencesKunming 650204 Chinese Medical College of Yunnan Province Kunming 650031

Chemical investigation on the neutral fraction of the ethanol extract from the roots of Spiraea japonica var. acuta has resulted in the isolation of one new diterpene amide, spiramide (1). Structure elucidation for 1 ... 详细信息

关键词： Spiraea japonica var. acuta spiramide