检索结果-南通市图书馆

Perspectives and Challenges of Family Members in Providing Mental Support to Cancer Patients:A Qualitative Study in Beijing,China

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Psycho-Oncologie 2024年第4期18卷 257-269页

作者： Wei wang lan Li Department of Social Sciences Universiti SelangorBatang Berjuntai45600Selangor Beijing Youth research Association Beijing100044China Sinounited investment Group Corporation Limited Postdoctoral Programme Beijing102611China

This study explores the perspectives and challenges faced by family members providing mental support to cancer patients in Beijing,*** primary objective is to understand the emotional and practical roles family members undertake and the difficulties they *** a qualitative research design,data were collected through semi-structured inter.iews with family caregivers of cancer *** analysis revealed several key themes:the dual burden of emotional support and caregiving responsibilities,the impact on daily life and personal well-being,the role and effectiveness of external support systems,perceptions of medical staff support,and the common challenges and conflicts faced in *** findings highlight the critical need for comprehensive support systems that address both the emotional and practical needs of family *** for enhancing family-centered support programs in oncology settings are discussed.

关键词： Family caregivers mental health support cancer patients qualitative study Beijing caregiving challenges emotional support healthcare systems

Total colorings of planar graphs with maximum degree at least 8

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Mathematics 2009年第8期52卷 1733-1742页

作者： SHEN lan wang YingQian College of Mathematics Physics and Information EngineeringZhejiang Normal UniversityJinhua 321004China

Planar graphs with maximum degree Δ 8 and without 5- or 6-cycles with chords are proved to be (Δ + 1)-totally-colorable.

关键词： planar graph total coloring maximum degree cycle chord 05C15 68r10

Crystal Plasticity-Based Spalling Damage Model for Ductile Metals

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Acta Mechanica Solida Sinica 2023年第1期36卷 76-85页

作者： Chen Li Hai-Ying wang lan-Hong Dai State Key Laboratory of Nonlinear Mechanics Institute of MechanicsChinese Academy of SciencesBeijing 100190China School of Engineering Science University of Chinese Academy of SciencesBeijing 100049China

Spalling is a typical tensile failure that results from the coupling evolution of microstructure and microdamage under high str.in-rate *** understand the spalling damage behavior of polycrystalline materials at mesoscale,this paper develops a spalling model by integrating the crystal plasticity theory and the microvoid growth *** model is implemented in ABAQUS simulation via the VUMAT subroutine to simulate a planar.impact process of copper,and the results are compared with experimental *** to the inhomogeneity of crystal plastic slip,the local stress fluctuates severely near the gr.in ***,without introducing the fluctuation in the threshold stress for microdamage evolution,this model can simulate the heterogeneous feature of microvoid nucleation,growth,and coalescence in *** results show that microvoids tend to nucleate at 25°–50°misorientation angle gr.in boundaries,which undergo a high probability of stress fluctuation.

关键词： Spalling Crystal plasticity Microvoid nucleation and growth Gr.in boundary Finite element method

Evaluation of Slow Light Periodic Signals Considering the Distor.ion in EDF

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 2014年第3期31卷 82-85页

作者： wang WU Chong-Qing wang Zhi LiU Guo-Dong LiU lan-lan SUN Zhen-Chao institute of Optical information and Key Lab of Luminescence and Optical information Technology Beijing Jiaotong University Beijing 100044

Based on the fundamental harmonic phase delay, a new definition of fundamental harmonic fractional delay （FHFD） is proposed to evaluate slow light with the consideration of signal distor.ion, to eliminate the dependence on the choice of the reference point. By solving the rate equation of er.ium-doped fiber （EDF）, it is shown that the slow light always accompanies the signal distor.ion when the periodic signal propagates in EDF, and FHFD depends on the signal distor.ion, as well as the average input power, the modulation depth and the length of EDF. The results of simulations and experiments indicate that the definition of FHFD is reasonable and effective to evaluate the slow light of periodic signals.

关键词： Signal distor.ion

Unique Duplex Microstructure and Porosity Effect on Mechanical Proper.ies of AlCoCrFeNi_(2.1) Eutectic High-Entropy Alloys Processed by Selective Laser Melting

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Metallur.ica Sinica(English Letters) 2023年第9期36卷 1465-1481页

作者： Liwei lan Wenxian wang Zeqin Cui Xiaohu Hao College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan030024China Key Laboratory of interface Science and Engineering in Advanced Materials Taiyuan University of TechnologyMinistry of EducationTaiyuan030024China Shanxi–Zhejiang Univer.ity New Materials and Chemical research institute Taiyuan030032China

Selective laser melting(SLM)was performed on AlCoCrFeNi_(2.1) eutectic high-entropy alloys(EHEAs),and the unique duplex microstructure and porosity were investigated as well as the negative effect on mechanical *** printed AlCoCrFeNi_(2.1) EHEAs is composed of face-centered cubic and BCC/B2 phases,and the surface texture of samples perpendicular to and parallel to the building direction is *** the bottom of the molten pool to the inside,the structure changes from dendrites to columnar crystals and then to cellular crystals,the distribution of elements in and around the molten pool is uniform,and there is no element *** surface hardness of as-printed AlCoCrFeNi_(2.1) EHEAs is higher than that of as-cast ones due to the gr.in refinement strengthening,and there is anisotropy in different surface hardness,the highest hardness is 580 HV(X–Y plane)and 560 HV(X–Z plane).The reduction of bearing area and tip stress concentration caused by pores have adverse effects on the tensile strength and elongation of the alloy,the ultimate tensile strength increased from 1060 to 1289 MPa.

关键词： Selective laser melting Eutectic high-entropy alloys Metallur.ical porosity Microstructure evolution Gr.ins and interfaces

A theoretical model for.investigating shear lag in composite cable-stayed bridges

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Structural and Civil Engineering 2023年第12期17卷 1907-1923页

作者： Wenting ZHANG lan DUAN Chunsheng wang Weihua rEN Department of Bridge Engineering College of HighwaysChang'an UniversityXi'an 710064China

The slab of the composite girder.is usually very wide in composite cable-stayed bridges,and the main girder has an obvious shear *** is an axial force in the main girder due to cable forces,which changes the normal stress distribution of the composite girder and affects the shear *** investigate the shear lag in the twin i-shaped composite girder(TiCG)of cable-stayed bridges,analytical solutions of TiCGs under bending moment and axial force were derived by introducing the additional deflection into the longitudinal displacement function.A shear lag coefficient calculation method of the TiCG based on additional deflection was *** with three load cases were conducted to simulate the main girder.in cable-stayed *** the stress,deflection,and shear lag coefficient obtained from the theoretical method considering additional deflection(TMAD)were verified by the experimental and finite element results.A generalized verification of a composite girder from existing references was made,indicating that the proposed method could provide more accurate results for the shear lag effect.

关键词： cable-stayed bridge composite girder shear lag energy method additional deflection

recurrent achalasia treated with Heller myotomy:A review of the literature

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2008年第46期14卷 7122-7126页

作者： lan wang You-Ming Li Department of Gastroenterology the First Affiliated Hospital Medical College Zhejiang UniversityHangzhou 310003 Zhejiang Province China

AiM： To evaluate the efficacy and safety of Heller myotomy （HM） for recurrent achlasia, performed after different methods of first-line treatment. METHODS： We searched for studies published in PubMed from 1966 to March 2008 on treatment of recurrent achalasia with HM after failure with different methods of first-line treatment. The efficacy of HM was assessed by a pooled estimate of response rate with individual studies weighted propor.ionally to sample size. rESULTS： Sixteen studies were eligible and included in the review, The results showed that HM has a better remission rate for recurrent achalasia after failure of HM [weighted mean （SD）] of 86.9% （21,8%） compared with 81.6% （23.8%） for pneumatic dilatation （PD）. One study evaluated the efficacy of HM after failure of PD combined with botulinum toxin injection （83%）, The most common complications were perforation and gastroesophageal reflux, CONCLUSiON： HM has the best efficacy in patients with recurrent achiasia who were treated with HM as first-line treatment, Future studies should focus on how to increase the success rate and decrease the complications of HM.

关键词： recurrent achalasia Heller myotomy Pneumatic dilatation

Osteoporotic Vertebral Fracture Classification in X-rays Based on a Multi-modal Semantic Consistency Network

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Bionic Engineering 2022年第6期19卷 1816-1829页

作者： Yuzhao wang Tian Bai Tong Li lan Huang College of Computer Science and Technology Jilin UniversityChangchun130012China Key Laboratory of Symbolic Computation and Knowledge Engineering of Ministry of Education Jilin UniversityChangchun130012China Department of Orthopedics The Second Hospital of Jilin UniversityChangchun130012China

Osteoporotic Vertebral Fracture(OVFs)is a common lumbar spine disorder that severely affects the health of *** a clear bone blocks boundary,CT images have gained obvious advantages in OVFs *** with CT images,X-rays are faster and more inexpensive but often leads to misdiagnosis and miss-diagnosis because of the overlapping *** how to transfer CT imaging advantages to achieve OVFs classification in X-rays is *** this purpose,we propose a multi-modal semantic consistency network which could do well X-ray OVFs classification by transfer.ing CT semantic consistency *** from existing methods,we introduce a feature-level mix-up module to get the domain soft labels which helps the network reduce the domain offsets between CT and *** the meanwhile,the network uses a self-rotation pretext task on both CT and X-ray domains to enhance lear.ing the high-level semantic invariant *** employ five evaluation metrics to compare the proposed method with the state-of-the-art *** final results show that our method improves the best value of AUC from 86.32 to 92.16%.The results indicate that multi-modal semantic consistency method could use CT imaging features to improve osteoporotic vertebral fracture classification in X-rays effectively.

关键词： Osteoporotic vertebral fracture classification Cross-modality Unsuper.ised domain adaptation Transfer lear.ing Convolutional neural network Computer-aided diagnosis

recent progress in photocatalytic NAD(P)H regeneration for photocatalytic-enzymatic-coupling system

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Chemical Science and Engineering 2024年第4期18卷 1-24页

作者： Wei lan Maodi wang Huicong Dai Qihua Yang Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Zhejiang Key Laboratory for Reactive Chemistry on Solid SurfacesInstitute of Physical ChemistryZhejiang Normal UniversityJinhua 321004China

The enzymatic redox reactions in natural photosynthesis rely much on the par.icipation of cofactors,with reduced nicotinamide adenine dinucleotide/nicotinamide adenine dinucleotide phosphate(NADH/NADPH)or their oxidized form(NAD+/NADP+)as an important redox *** photocatalytic regeneration of expensive and unstable NADH/NADPH in vitro is an important process in enzymatic reduction and has attracted much research *** different types of photocatalysts have been developed for photocatalytic NADH/NADPH regeneration,the efficiency is still relatively *** elucidate the key factors affecting the performance of photocatalytic NADH/NADPH regeneration is helpful to rationally design the photocatalyst and improve the photocatalytic *** this paper,we over.iew the recent progress in photocatalytic NADH/NADPH regeneration with the focus on the strategies to improve the visible light adsorption,the charge separation and migration efficiency,as well as the surface reaction,which jointly deter.ine the overall photocatalytic regeneration *** potential development of photocatalytic NADH/NADPH regeneration and photocatalyticenzymatic-coupling system is prospected finally.

关键词： photocatalytic-enzymatic coupling NAD(P)H regeneration photocatalysis efficiency