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Reducing Subspaces of Toeplitz Operators Induced by a Class of non-analytic m.nomials over the Unit Ball

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Acta mathematica Sinica,English Series 2024年第7期40卷 1767-1777页

作者： yan Yue SHI bo ZHAnG Xu TAnG Yu Feng LU School of mathematical Sciences Ocean University of ChinaQingdao 266100P.R.China School of mathematics and Information Sciences Yantai UniversityYantai 264005P.R.China School of mathematical Sciences Space Engineering UniversityBeijing 101416P.R.China School of mathematical Sciences Dalian University of TechnologyDalian 116024P.R.China

In this paper,we describe the m.nimal reducing subspaces of Toeplitz operators induced by non-analytic m.nomials on the weighted Bergm.n spaces and Dirichlet spaces over the unit ball B_(2).It is proved that each m.nimal reducing subspace m is finite dim.nsional,and if dim m≥3,then m is induced by a ***,the structure of commutant algebra v(T_(w)n_(z)n):={m^(*)_(w)nm_(z)n,m^(*)_(z)nm_(w)n}′is determ.ned by n and the two dim.nsional m.nimal reducing subspaces of(T_(w)n_(z)*** also give some interesting examples.

关键词： Reducing subspace operator-weighted shifts Toeplitz operator von neum.nn algebra

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A multi-Token Sector Antenna neighbor Discovery Protocol for Directional Ad Hoc networks

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China Comm.nications 2024年第7期21卷 149-168页

作者： Zhang Hang Li bo yan Zhongjiang yang mao Li Xinru School of Electronics and Information Northwestern Polytechnical UniversityXi’an 710072China The 54th Research Institute of CETC Shijiazhuang 050081China

In this paper,we propose a multi-token Sector Antenna neighbor Discovery(m-SAnD)protocol to enhance the efficiency of neighbor discovery in asynchronous directional ad hoc *** central concept of our work involves maintaining multiple tokens across the *** prevent mutual interference am.ng multi-token holders,we introduce the time and space non-interference ***,we propose a master-slave strategy between *** the master token holder(mTH)performs the neighbor discovery,it decides which 1-hop neighbor is the next mTH and which 2-hop neighbors can be the new slave token holders(STHs).Using this approach,the mTH and multiple STHs can simultaneously discover their neighbors without causing interference with each *** on this foundation,we provide a comprehensive procedure for the m-SAnD *** also conduct theoretical analyses on the maximum.number of STHs and the lower bound of multi-token generation ***,simulation results dem.nstrate the time efficiency of the m-SAnD *** compared to the QSAnD protocol,which uses only one token,the total neighbor discovery time is reduced by 28% when 6beams and 112 nodes are employed.

关键词： multi-token neighbor discovery SAnD protocol sector antenna ad hoc network

Processing of a low-costγ-γ'niPtAl coating with improved oxidation resistance

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Rare metals 2024年第6期43卷 2832-2841页

作者： yan Jiang Liang-Liang Wei Jian He Hong-bo Guo School of materials Science and Engineering Beihang UniversityBeijing 100191China Key Laboratory of High-Temperature Structural materials and Protective Coatings Ministry of Industry and Information TechnologyBeihang UniversityBeijing 100191China

A novelγ-γ'(ni solid solution—ni_(3)Al)niPtAl coating was produced on advanced single-crystal(SC)superalloy n5 by electroplating of a thin Pt coating with~3μm in thickness followed by heat treatm.nt at 1000℃in *** comparison,a traditionalγ-γ'niPtAl coating was also produced by electroplating of a thick Pt coating with~6μm in thickness followed by heat treatm.nt at 1100℃in *** novel coating has a mass gain of~0.5 mg·cm^(-2)after 100 h 1-h cyclic oxidation at 1150℃,showing better oxidation resistance than the traditional *** oxide scale mostly consisting ofα-Al_(2)O_(3)grew on the novel coating because the elem.nt Cr from the SC alloy substrate contributes to the formation ofα-Al_(2)O_(3).Pt content in the novel coating has significant effect on the oxidation *** optimized Pt content in the coating is about 16 at%,which is helpful to reduce the diffusion of harmful elem.nts from the substrate into the coating but also to reduce the cost of the coating.

关键词： γ-γ'niPtAl coating Platinum Oxidation Al_(2)O_(3) Superalloy

BaCe_(0.8)Fe_(0.1)ni_(0.1)O_(3−δ)-impregnated ni-GDC by phase-inversion as an anode of solid oxide fuel cells with on-cell dry methane reform.ng

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Journal of Advanced Ceramics 2024年第6期13卷 834-841页

作者： yanya Liu Jun Luo Cheng Li bo Liu Dong yan Jian Li Lichao Jia School of materials Science and Engineering State Key Laboratory of Materials Processing and Die&Mould TechnologyHuazhong University of Science and TechnologyWuhan 430074China

BaCe_(0.8)Fe_(0.1)ni_(0.1)O_(3−δ)(BCFn)in a perovskite structure is impregnated consecutively by BCFn solution and BCFn suspension into a phase-inversion prepared niO–Gd_(0.1)Ce_(0.9)O_(2−δ)(GDC)scaffold as an anode for solid oxide fuel cells(SOFCs)with on-cell dry reform.ng of methane(DRm).The whole pore surface of the scaffold is covered by small BCFn particles formed by BCFn solution impregnation;the large pores near the scaffold surface are filled by BCFn aerogels with a high specific surface area produced by BCFn suspension impregnation,which act as a catalytic layer for on-cell *** reduction,the anode consists of a ni–GDC scaffold and BCFn particles with exsolved Feni3 *** BCFn-impregnated ni–GDC anode has higher electrical conductivity,electrochemical activity,and resistance to carbon deposition,with which the cell shows maximum power densities between 1.44 and 0.92 W·cm^(−2) when using H_(2) and between 1.09 and 0.50 W·cm^(−2) when using CO_(2)–CH_(4) at temperatures ranging from 750 to 600℃.A stable perform.nce at 400 mA·cm^(−2) and 700℃is achieved using 45%CO_(2)–45%CH_(4)–10%n_(2) for more than 400 h without carbon deposition,benefiting from the impregnated BCFn aerogel with a high specific surface area and water adsorbability.

关键词： aerogel solid oxide fuel cells(SOFCs) phase-inversion dry reform.ng of methane(DRm) carbon resistance

Influence of different magnetic forces on the effect of colonic anastomosis in rats

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World Journal of Gastrointestinal Surgery 2024年第3期16卷 860-870页

作者： bo-yan Tian miao-miao Zhang Jia ma Yi Lyu Xiao-Peng yan Departm.nt of Hepatobiliary Surgery The First Affiliated Hospital of Xi'an Jiaotong UniversityXi'an 710061Shaanxi ProvinceChina national Local Joint Engineering Research Center for Precision Surgery&Regenerative medicine The First Affiliated Hospital of Xi'an Jiaotong UniversityXi'an 710061Shaanxi ProvinceChina Departm.nt of Surgical Oncology Shaanxi Provincial People's HospitalXi'an 710068Shaanxi ProvinceChina

BACKGROUnD Despite much work having been conducted on magnetic compression anastomo-sis(mCA)in the digestive tract,there are no reports on the influence of magnetic force on the *** To investigate the effect of different magnetic force magnets on the mCA of the digestive *** Two groups of magnets of the same sizes but different magnetic forces were designed and produced.A total of 24 Sprague-Dawley rats were randomly assigned into two groups(powerful magnet group and comm.n magnet group),with 12 rats in each *** types of magnets were used to complete the colonic side-to-side anastomosis of the *** operation time and magnet discharge time were *** anastomotic specim.ns were obtained 4 wk after the operation and then the burst pressure and diameter of the anastomosis were measured,and the anastomosis was observed via the naked eye and subjected to histological *** The magnetic forces of the powerful and comm.n magnet groups at zero distance were 8.26 n and 4.10 n,*** colonic side-to-side anastomosis was completed in all 24 rats,and the operation success rate and postoperative survival rate were 100%.no significant difference was noted in the operation time between the two *** magnet discharge time of the powerful magnet group was slightly longer than that of the comm.n magnet group,but the difference was not statistically significant(P=0.513).Furthermore,there was no statistical difference in the burst pressure(P=0.266)or diameter of magnetic anastomosis(P=0.095)between the two *** gross specim.ns of the two groups showed good anastomotic healing,and histological observation indicated good mucosal continuity without differences on *** In the rat colonic side-to-side mCA model,both the powerful magnet with 8.26 n and the comm.n magnet with 4.10 n showed no significant impact on the anastomosis establishm.nt process or its effect.

关键词： magnetosurgery magnetic compression anastomosis Colonic anastomosis magnetic force Rats

Complem.nt factor Ⅰ knockdown inhibits colon cancer developm.nt by affecting Wnt/β-catenin/c-myc signaling pathway and glycolysis

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World Journal of Gastrointestinal Oncology 2024年第6期16卷 2646-2662页

作者： Yong-Jun Du Yue Jiang yan-mei Hou Yong-bo Shi Departm.nt of Proctology Hospital of Chengdu University of Traditional Chinese MedicineChengdu 610072Sichuan ProvinceChina School of Clinical medicine Chengdu University of Traditional Chinese MedicineChengdu 610075Sichuan ProvinceChina Departm.nt of Proctology Zigong Hospital of Traditional Chinese MedicineZigong 643000Sichuan ProvinceChina

BACKGROUnD Colon cancer(CC)occurrence and progression are considerably influenced by the tumor ***,the exact underlying regulatory mechanisms remain *** To investigate imm.ne infiltration-related differentially expressed genes(DEGs)in CC and specifically explored the role and potential molecular mechanisms of complem.nt factor I(CFI).mETHODS Imm.ne infiltration-associated DEGs were screened for CC using *** reverse transcription polymerase chain reaction was used to exam.ne hub DEGs expression in the CC cell *** CFI-knockdown HT29 and HCT116 cell lines were constructed,and the diverse roles of CFI in vitro were assessed using CCK-8,5-ethynyl-2’-deoxyuridine,wound healing,and transwell *** and eosin staining and imm.nohistochemistry staining were employed to evaluate the influence of CFI on the tumorigenesis of CC xenograft models constructed using BALB/c male nude *** proteins associated with glycolysis and the Wnt pathway were measured using western *** Six key imm.ne infiltration-related DEGs were screened,am.ng which the expression of CFI,complem.nt factor B,lymphoid enhancer binding factor 1,and SRY-related high-mobility-group box 4 was upregulated,whereas that of fatty acid-binding protein 1,and bone morphogenic protein-2 was ***,CFI could be used as a diagnostic biomarker for ***,CFI silencing inhibited CC cell proliferation,migration,invasion,and tumor ***,CFI knockdown downregulated the expression of key glycolysis-related proteins(glucose transporter type 1,hexokinase 2,lactate dehydrogenase A,and pyruvate kinase m2)and the Wnt pathway-related proteins(β-catenin and c-myc).Further investigation indicated that CFI knockdown inhibited glycolysis in CC by blocking the Wnt/β-catenin/c-myc *** The findings of the present study dem.nstrate that CFI plays a crucial role in CC developm.nt by influencing g

关键词： Colon cancer Imm.ne infiltration Complem.nt factor I Glycolysis Wnt/β-catenin/c-myc pathway

Enhancing blocking temperature using inverse hydrogen bonds for non-radical bridged dimeric Dy(Ⅲ) single-molecule magnets

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Science China Chemistry 2024年第10期67卷 3328-3338页

作者： Peng-bo Jin Qian-Cheng Luo Ye-Ye Liu yan-Zhen Zheng Frontier Institute of Science and Technology State Key Laboratory of Electrical Insulation and Power EquipmentMOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed MatterXi'an Key Laboratory of Electronic Devices and Material Chemistry and School of ChemistryXi'an Jiaotong University

Single-molecule magnets（Smms） are a kind of nanosized magnetic materials that are capable of storing massive bytes of *** coupling the spin centers in a proper m.nner is a usual approach to promote the working temperature（or blocking temperature） for *** delocalized radicals have been widely employed to accomplish this ***,we show a new m.nner by using weak but multiple B–Hδ-···Dy3+inverse hydrogen bonding（IHB） interactions to control the magnetic couplings in a series of dimeric dysprosiacaborane *** approach leads to a record high TB100sof 10 K am.ng non-radical bridged dimeric Smms,which is mainly ascribed to strong ferromagnetic coupling(4.38 cm-1) and the proper alignm.nt of the magnetic principle axes of the adjacent dysprosium（Ⅲ） *** verifying by theoretical calculations,these results dem.nstrate that IHB interactions can be used to construct strong axial ferromagnetic coupling and enhancing magnetic blocking temperature for Smms.

关键词： single-molecule magnets carborane dysprosium ferromagnetic coupling inverse hydrogen bond

Isolation and culture of hum.n primary osteoblasts:Comparing the effects of differences in method details on osteoblast characteristics

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Genes & Diseases 2024年第2期11卷 546-549页

作者： Fei Chen yan Zhang Pai Peng Xiao-Ting Huang Zi-Han Qiu Bao-Cheng Liu Tie-Lin yang bo yang yan Guo Key Laboratory of Biomedical Information Engineering of m.nistry of Education Biomedical Informatics & Genomics CenterSchool of Life Science and TechnologyXi'an Jiaotong UniversityXi'anShaanxi 710049China Departm.nt of Orthopaedics Shannxi Provincial People's Hospital (The Third Affiliated Hospital of Xi'an Jiaotong University)Xi'anShaanxi 710068China

Osteoblasts are essential in the maintenance of hum.n bone homeostasis.1 The abnormal formation and impaired differentiation ability of osteoblasts are pivotal factors leading to bone-related diseases,suggesting that an indepth study of osteoblasts can provide novel treatm.nt strategies for these diseases.2 Hum.n primary osteoblasts are precious experim.ntal models in bone-related research.3 However,the isolation and culture of hum.n primary osteoblasts still have some difficulties and ***,we refined a method to isolate and culture hum.n primary osteoblasts by taking cancellous bone through a bone tissue sampler and pre-digesting it with pancreatin,which makes the process easier,cheaper,and more ***,we compared the effects of the subtle changes in isolation and culture methods on the phenotype of hum.n primary osteoblasts and exam.ned the differences in morphology,proliferation,and differentiation between micro-explants cultured osteoblasts(mECOBs)and explants cultured osteoblasts(EC-OBs).

关键词： impaired culture details

Bipolar hip arthroplasty using conjoined tendon preserving posterior lateral approach in treatm.nt of displaced femoral neck fractures

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World Journal of Clinical Cases 2024年第6期12卷 1076-1083页

作者： Ting-Xin yan Sheng-Jie Dong bo ning Yu-Chi Zhao Departm.nt of Joint Surgery Yantaishan HospitalYantai 264003Shandong ProvinceChina Departm.nt of Joint Surgery Dongying People's HospitalDongying 257091Shandong ProvinceChina

BACKGROUnD Hip fractures account for 23.8%of all fractures in patients over the age of 75 *** than half of these patients are older than 80 *** hemiarthroplasty(BHA)was established as an effective m.nagem.nt option for these *** approaches can be used for the BHA ***,there is a high risk of postoperative *** conjoined tendon-preserving posterior(CPP)lateral approach was introduced to reduce postoperative dislocation *** To evaluate the effectiveness and safety of the CPP lateral approach for BHA in elderly *** We retrospectively analyzed medical data from 80 patients with displaced femoral neck fractures who underwent *** patients were followed up for at least 1 *** the 80 patients,57(71.3%)were *** time to operation averaged 2.3 d(range:1-5 d).The mean age was 80.5 years(range:67-90 years),and the mean body mass index was 24.9 kg/m^(2)(range:17-36 kg/m^(2)).According to the Garden classification,42.5%of patients were typeⅢand 57.5%of patients were typeⅣ.Uncem.nted bipolar hip prostheses were used for all *** conjoined tendons,dislocations,and adverse complications during and after surgery were *** The mean postoperative follow-up time was 15.3 m.nths(range:12-18 m.nths).The average surgery time was 52 m.n(range:40-70 m.n)with an average blood loss of 120 mL(range:80-320 mL).The transfusion rate was 10%(8 of 80 patients).The gemellus inferior was torn in 4 patients(5%),while it was difficult to identify in 2 patients(2.5%)during *** posterior capsule was punctured by the fractured femoral neck in 3 patients,but the conjoined tendon and the piriformis tendon remained *** patients had stem varus greater than 3 degrees or femoral *** were no patients with stem subsidence more than 5 mm at the last *** postoperative dislocations were observed throughout the follow-up *** significance was found between preoperative an

关键词： Conjoined tendon preserving Bipolar hip arthroplasty Femoral neck fractures Postoperative dislocation Posterolateral approach