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World Journal of Gastrointestinal Oncology 2025年第1期17卷 226-232页

作者： Kai Chen xu feng Yuan Shi Xin-Lin Li Zheng-Rong Shi Xiang Lan Department of Hepatobiliary Surgery The First Affiliated Hospital of Chongqing Medical UniversityChongqing 400016China

BACKGROUND Gallbladder cancer(GBC)is the most common and aggressive subtype of biliary tract cancer(BTC)and has a poor prognosis.A newly developed regimen of gemcitabine,cisplatin,and durvalumab shows promise for the treatment of advanced ***,the efficacy of this treatment for GBC remains *** SUMMARY In this report,we present a case in which the triple-drug regimen exhibited marked effectiveness in treating locally advanced GBC,thus leading to a long-term survival benefit.A 68-year-old man was diagnosed with locally advanced GBC,which rendered him ineligible for curative *** three cycles of therapy,a partial response was *** one year of combined therapy,a clinical complete response was successfully *** maintenance therapy with durvalumab monotherapy resulted in a disease-free survival of 9 months for the *** patient experienced tolerable toxicities of reversible grade 2 nausea and *** adverse events were observed in the patient throughout the entirety of the *** The combination of gemcitabine and cisplatin chemotherapy with durvalumab was proven to be an effective treatment approach for advanced GBC,with manageable adverse *** research is warranted to substantiate the effectiveness of the combined regimen in the context of GBC.

关键词： Gallbladder cancer Chemotherapy Immunotherapy Durvalumab Complete response Case report

Intersection of two rare conditions:Clinical reflection on tuberous sclerosis combined with primary lymphedema

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World Journal of Clinical Cases 2025年第7期13卷 13-16页

作者： Xiao Wu Xiao-Hui Min Hai-feng xu M Jalal Ud Din Gang Zhang Department of Neurology Children's Hospital of Nanjing Medical UniversityNanjing 210008Jiangsu ProvinceChina Department of Pediatrics Peking University Shenzhen HospitalShenzhen 518036Guangdong ProvinceChina Nanjing Medical University Nanjing 210000Jiangsu ProvinceChina

This editorial discusses a case report recently published in the World Journal of Clinical *** report describes the clinical presentation,imaging,diagnosis,and treatment of a patient with tuberous sclerosis complex(TSC)combined with primary lymphedema(PLE).Additionally,it retrospectively analyzes the data of 16 previously reported cases of children with TSC combined with PLE to summarize the epidemiology,genetic diagnosis,and current main treatments of these *** report also speculates on the pathological and physiological mechanisms underlying TSC combined with *** combined with PLE is rare;therefore,the report provides a theoretical basis for understanding the pathophysiological mechanisms and treatment options for patients with TSC and *** clinical management of TSC is essential due to the diverse and multiorgan nature of its manifestations,often requiring a multidisciplinary approach for newly diagnosed cases.

关键词： Tuberous sclerosis complex Lymphedema Examination Diagnosis Treatment

Permutation orbifolds of vertex operator superalgebras and associative algebras

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Science China Mathematics 2025年第01期 19-38页

作者： Chongying Dong feng xu Nina Yu Department of Mathematics University of California at Santa Cruz Department of Mathematics Huzhou University Department of Mathematics University of California at Riverside School of Mathematical Sciences Xiamen University

Let V be a vertex operator superalgebra and g =（1 2 ···k） be a k-cycle which is viewed as an automorphism of the tensor product vertex operator superalgebra V■*** this paper,we construct an explicit isomorphism from Ag(V■k) to A（V） if k is odd and to Aσ（V） if k is even where σ is the canonical automorphism of V of order 2 determined by the superspace structure of *** recover previous results by Barron（2016）and Barron and Vander Werf（2014） that there is a one-to-one correspondence between irreducible g-twisted V■k-modules and irreducible V-modules（*** σ-twisted V-modules） when k is odd（***）.This explicit isomorphism is expected to be useful in our further study on the Zhu algebra of the fixed point subalgebra.

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Bulk viscosity of interacting magnetized strange quark matter

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Nuclear Science and Techniques 2021年第10期32卷 101-109页

作者： Jian-feng xu School of Physics and Electrical Engineering AnYang Normal UniversityAnyang 455000China

The bulk viscosity of interacting strange quark matter in a strong external magnetic field B m with a real equation of state is *** is found that interquark interactions can significantly increase the bulk viscosity,and the magnetic field B_(m) can cause irregular oscillations in both components of the bulk viscosity,ξ||(parallel to B_(m))and ξ⊥(perpendicular to B_(m)).A comparison with non-interacting strange quark matter reveals that when B_(m) is sufficiently large,ξ⊥is more affected by interactions than ξ||.Additionally,the quasi-oscillation of the bulk viscosity with changes in density may facilitate the for-mation of magnetic ***,the resulting r-mode instability windows are in good agreement with observational data for compact stars in low-mass X-ray ***,the r-mode instability window for interacting strange quark matter in high magnetic fields has a minimum rotation frequency exceeding 1050 Hz,which may explain the observed very high spin frequency of a pulsar with V=1122 Hz.

关键词： Strange quark matter Bulk viscosity Strong magnetic field Strange star R-mode instability window

A modular multilevel power flow controller for meshed HVDC grids

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Science China(Technological Sciences) 2014年第9期57卷 1773-1784页

作者： xu feng xu Zheng Department of Electrical Engineering Zhejiang University

Based on the comparison of existing power flow controllers(PFC)in meshed HVDC grids,the full-bridge modular multilevel converter based PFC(MMPFC)is *** first,the general branch current calculation method of meshed HVDC grids with the PFC is presented,and then,the issue of over-voltage on the thyristor based PFC is described and *** the analysis of different operating modes of the full-bridge sub-module,the mechanism of over-voltage ride through of the MMPFC is *** control strategy of the MMPFC,which is used to control branch current and keep capacitor voltage balancing,is ***,the performance on current regulation,bidirectional operation and over-voltage ride through is simulated and verified in a built model with PSCAD/EMTDC.

关键词： meshed HVDC grids multi-terminal HVDC modular multilevel power flow controller (MMPFC) bidirectional operation over-voltage ride through full-bridge sub-module

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Cu-Fe合金凝固过程中结构变化研究

原子与分子物理学报 2025年第6期42卷 183-192页

作者：王旭锋张真豪高绪锋金雅璇张寒雨李运刚华北理工大学冶金与能源学院唐山063210

采用分子动力学模拟方法研究了Cu_(100-X)Fe_(X)(X=1%、3%、5%)合金在冷却速率为2×10^(10)K/s条件下合金凝固过程.研究表明,Fe含量为1%时,随着合金温度的降低Fe原子始终保持均匀分布的状态,未出现Fe原子聚集现象,晶体结构是以FCC为主... 详细信息

采用分子动力学模拟方法研究了Cu_(100-X)Fe_(X)(X=1%、3%、5%)合金在冷却速率为2×10^(10)K/s条件下合金凝固过程.研究表明,Fe含量为1%时,随着合金温度的降低Fe原子始终保持均匀分布的状态,未出现Fe原子聚集现象,晶体结构是以FCC为主的Cu基体,Fe原子以固溶形式存在于基体中.Fe含量为3%时,随着合金温度的降低Fe原子有聚集趋势,但BCC晶体结构占比较小,晶体结构仍是以FCC为主的Cu基体.Fe含量为5%,随着合金温度的降低Fe原子发生明显聚集,最终形成以FCC、HCP晶体类型为主镶嵌Fe原子的Cu基体.研究了Fe团簇的形成过程,结果表明,Fe团簇的形成、长大是一个连续的过程,该过程受形核生长机制控制,不同阶段形成Fe团簇的大小和数量受Fe-Fe原子相互作用力、Fe原子的扩散能力以及Fe团簇与Cu基体间的界面能三个因素共同影响.

关键词： Cu-Fe合金快速凝固晶体结构 Fe团簇

A Mean Value of Cochrane Sum

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Acta Mathematica Sinica,English Series 2009年第2期25卷 223-234页

作者： Zhe feng xu College of Science Xi'an Jiaotong University Xi'an 710049 P. R. China Department of Mathematics Northwest University Xi'an 710069 P. R. China

Let q 〉 4 be an integer. The main purpose of this paper is to study the mean value of Cochrane sum C（a, q） in quarter intervals, and obtain a sharp asymptotic formula for it.

关键词： Dedekind sum Cochrane sums mean value asymptotic formula

Unconventional chiral d-wave superconducting state in strained graphene

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Chinese Physics B 2019年第11期28卷 326-332页

作者： feng xu Lei Zhang Department of Physics Jiangxi Normal UniversityNanchang 330022China Department of Physics Shaanxi University of TechnologyHanzhong 723001China

We consider a highly unconventional superconducting state with chiral d-wave symmetry in doped graphene under strain with the Gutzwiller–RVB method in the momentum space. It is shown that flat bands emerge in the normal state for reasonable strain. As a result, the superconducting critical temperature is found to be linearly proportional to the strength of the electron–electron interaction. Furthermore, the chiral d-wave superconducting state is shown with coexistence of the charge density wave and the pair density wave. There are different coexisting states with those orders under different doping levels.

关键词： chiral d-wave superconducting state pair density wave flat band doped graphene

Experimental research on grouser traction of deep-sea mining machine

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Applied Mathematics and Mechanics(English Edition) 2015年第9期36卷 1243-1252页

作者： Wenbo MA Qiuhua RAO Kang feng feng xu School of Civil Engineering Central South University

The traction characteristics of the grouser, cutting the simulative soil of deepsea sediment, with different tooth widths, tooth heights, and ground pressures are studied with traction characteristic test apparatus. A traction-displacement model is obtained by combining the analysis of the cutting mechanism. The results show that the tractiondisplacement curves of grousers with different tooth widths, tooth heights, and ground pressures have the same changing trend, which matches the Wong traction model. Their sensitivity coefficient and shear modulus are slightly fluctuated. Therefore, the average values can be used as the traction model parameters. The maximum traction of the grouser with a two-side edge and a 10 mm tooth width increment changing with the tooth height and ground pressure can be determined according to the grousers with different tooth widths. By combining the traction model parameters, the traction-displacement curve of the grouser with a certain group values of tooth width, tooth height, and ground pressure can be predicted. Therefore, the slip of the mining machine can be prevented to improve the mining efficiency.

关键词： deep-sea sediment simulative soil traction test deep-sea mining machine,grouser traction model

Refined empirical line method to calibrate IKONOS imagery

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第4期7卷 641-646页

作者： xu Jun-feng HUANG Jing-feng Institute of Agricultural Remote Sensing and lnformation Technology Zhejiang University Hangzhou 310029. China

To extract quantitative biophysical parameters such as leaf biomass and leaf chlorophyll concentration from the remotely sensed imagery, the effect of atmospheric attenuation must be removed. The refined empirical line （REL） method was used to calibrate the IKONOS multispectral imagery. The IKONOS digital numbers （DN） were converted to the at-satellite reflectance, then the linear relation between at-satellite reflectance and surface spectral reflectance （ρA） was derived from six bright targets of known reflectance in the image, and modelled estimates of the image reflectance at ρA=0. Validation targets were used to test the feasibility of REL method. The mean relative errors between ρA retrieved from IKONOS image using REL method and ground-measured ρA were 11%, 13%, 3% and 5% in the IKONOS blue, green, red and near-infrared （NIR） respectively. When dark targets are unavailable or measurement of dark target is inconvenient, the REL method was most crucial for retrieving surface spectral reflectance. The REL offers a simple approach for quantitative retrieval of biophysical parameters from IKONOS imagery.

关键词： Calibration Refined empirical line (REL) method IKONOS