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Enabling the transfer matrix method to model serial-parallel compliant mechanisms including curved flexure beams

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International Journal of Mechanical System Dynamics 2024年第1期4卷 48-62页

作者： Mingxiang ling Lei yuan Tingjun Zeng Xianmin Zhang Robotics and Microsystems Center Soochow UniversitySoochowChina Guangdong Key Laboratory of Precision Equipment and Manufacturing Technology School of Mechanical and Automotive EngineeringSouth China University of TechnologyGuangzhouChina

Compliant mechanisms with curved flexure hinges/beams have potential advantages of small spaces,low stress levels,and flexible design parameters,which have attracted considerable attention in precision engineering,metamaterials,robotics,and so ***,serial-parallel configurations with curved flexure hinges/beams often lead to a complicated parametric ***,the transfer matrix method is enabled for analysis of both the kinetostatics and dynamics of general serial-parallel compliant mechanisms without deriving laborious formulas or combining other modeling ***,serial-parallel compliant mechanisms with curved flexure hinges/beams can be modeled in a straightforward manner based on a single transfer matrix of Timoshenko straight beams using a step-by-step *** and numerical validations on two customized XY nanopositioners comprised of straight and corrugated flexure units confirm the concise modeling process and high prediction accuracy of the presented *** conclusion,the present study provides an enhanced transfer matrix modeling approach to streamline the kinetostatic and dynamic analyses of general serial-parallel compliant mechanisms and beam structures,including curved flexure hinges and irregular-shaped rigid bodies.

关键词： compliant mechanisms curved flexure beams transfer matrix method nanopositioner rigid-body dynamics

Melting mechanisms of Pt-based multimetallic spherical nanoparticles by molecular dynamics simulation

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Rare Metals 2023年第2期42卷 406-417页

作者： Chun-Yu Cheng yuan-yuan Guo Yi-Ming Zou Amanda Jiamin Ong Alfred ling Yoong Tok Shuzhou Li School of Materials Science and Engineering Nanyang Technological UniversitySingapore639798Singapore

The melting mechanisms of Pt-based multimetallic nanoparticles(NPs)are important to help determine their optimal melting *** understand the melting and coalescence behaviors of heterogeneous NPs(Pd-Pt NPs)with various sizes and compositions,molecular dynamics(MD)simulation was *** MD results for larger Pd-Pt NPs with an effective diameter of4.6-7.8 nm show that PtPd alloy can form at Pd/Pt interface before Pd NP melted completely,while for Pt-core/Pdshell NP and Pd-core/Pt-shell NP,PtPd alloy formed only after Pd portion melted *** smaller Pd-Pt NPs with an effective diameter of 2.5-4.0 nm,PdPt alloy is not formed until both Pd and Pt NPs melted ***,the coalescence process of Pd-Pt NPs depends on the melting temperature of Pt NP when Pt composition is higher than 20 at%.Furthermore,the melting mechanisms of Pd/Pt/Ir trimetallic NPs are investigated.A two-step melting process occurs in Pd-Pt-Ir NPs and Ir-core/Ptshell/Pd-shell NP,and the melting sequence of Pd-core/Ptshell/Ir-shell NP and Pt-core/Pd-shell/Ir-shell NP is different from Pd/Pt bimetallic NPs.

关键词： Molecular dynamics(MD) Melting mechanism Pt-based Multimetallic Heterogeneous structure

On a general class of quadratic hopping sequences

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Science in China(Series F) 2008年第12期51卷 2101-2114页

作者： JIA HuaDing yuan Ding PENG Daiyuan GUO ling School of Economics Information Engineering Southwestern University of Finance and Economics Chengdu 610074 China College of Computer Science Sichuan University Chengdu 610064 China School of Computer Science Sichuan Normal University Chengdu 610068 China School of Information Science and Technology Southwest Jiaotong University Chengdu 610031 China

Based upon quadratic polynomials over the finite field, a new class of frequency hopping sequences with large family size suitable for applications in time/frequency hopping CDMA systems, multi-user radar and sonar systems is proposed and investigated. It is shown that the new time/frequency hopping sequences have at most one hit in their autocorrelation functions and at most two hits in their crosscorrelation functions except for a special case, and their family size is much larger than the conventional quadratic hopping sequences. The percentage of full collisions for the new quadratic hopping sequences is discussed. In addition, the average number of hits for the new quadratic hopping sequences, quadratic congruence sequences, extended quadratic congruence sequences and the general linear hopping sequences are also derived.

关键词： code division multiple access design of sequences frequency hopping sequences time hopping se-quences

Analysis of the Influence of the Blade Deformation on Wind Turbine Output Power in the Framework of a Bidirectional Fluid-Structure Interaction Model

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Fluid Dynamics & Materials Processing 2023年第5期19卷 1129-1141页

作者： ling yuan Zhenggang Liu Li Li Ming Lin CHN Energy United Power Technology Co. Ltd.Beijing100036China School of Energy and Power Engineering Shandong UniversityJinan250061China School of Renewable Energy North China Electric Power UniversityBeijing102206China

The blades of large-scale wind turbines can obviously deform during operation,and such a deformation can affect the wind turbine’s output power to a certain *** order to shed some light on this phenomenon,for which limited information is available in the literature,a bidirectional fluid-structure interaction(FSI)numerical model is employed in this *** particular,a 5 MW large-scale wind turbine designed by the National Renewable Energy Laboratory(NREL)of the United States is considered as a *** research results show that blades’deformation can increase the wind turbine’s output power by 135 kW at rated working *** with the outcomes of the simulations conducted using the model with no blade deformation,the results obtained with the FSI model are closer to the experimental *** is concluded that the bidirectional FSI model can replicate the working conditions of wind turbines with great fidelity,thereby providing an effective method for wind turbine design and optimization.

关键词： Wind turbine fluid-structure interaction numerical simulation blade

Challenges and exploration for immunotherapies targeting cold colorectal cancer

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World Journal of Gastrointestinal Oncology 2023年第1期15卷 55-68页

作者： Dan-Dan Li yuan-ling Tang Xin Wang Department of Abdominal Oncology/Radiation Oncology Cancer CenterWest China HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina

In recent years,immune checkpoint inhibitors(ICIs)have made significant breakthroughs in the treatment of various tumors,greatly improving clinical *** the fifth most common antitumor treatment strategy for patients with solid tumors after surgery,chemotherapy,radiotherapy and targeted therapy,the therapeutic response to ICIs largely depends on the number and spatial distribution of effector T cells that can effectively identify and kill tumor cells,features that are also important when distinguishing malignant tumors from“cold tumors”or“hot tumors”.At present,only a small proportion of colorectal cancer(CRC)patients with deficient mismatch repair(dMMR)or who are microsatellite instability-high(MSI-H)can benefit from ICI treatments because these patients have the characteristics of a“hot tumor”,with a high tumor mutational burden(TMB)and massive immune cell infiltration,making the tumor more easily recognized by the immune *** contrast,a majority of CRC patients with proficient MMR(pMMR)or who are microsatellite stable(MSS)have a low TMB,lack immune cell infiltration,and have almost no response to immune monotherapy;thus,these tumors are“cold”.The greatest challenge today is how to improve the immunotherapy response of“cold tumor”*** the development of clinical research,immunotherapies combined with other treatment strategies(such as targeted therapy,chemotherapy,and radiotherapy)have now become potentially effective clinical strategies and research ***,the question of how to promote the transformation of“cold tumors”to“hot tumors”and break through the bottleneck of immunotherapy for cold tumors in CRC patients urgently requires *** by developing an in-depth understanding of the immunotherapy mechanisms of cold CRCs can we screen out the immunotherapy-dominant groups and explore the most suitable treatment options for individuals to improve therapeutic efficacy.

关键词： Colorectal cancer Immune checkpoint inhibitors Cold tumors Immunotherapy mechanism Combination therapy Effector T cells

Nursing outcomes of traditional Chinese medicine adjunctive therapy on osteofascial compartment syndrome:a review

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Frontiers of Nursing 2023年第2期10卷 163-173页

作者： Ya-Ping Su Rui-ling Li yuan-yuan Wang ling-Yu Han School of Nursing and Health Henan UniversityKaifengHenan 450046China Department of Continuous Education The First Affiliated Hospital of Henan UniversityKaifengHenan 450046China

The rate of disability due to acute osteofascial compartment syndrome(OCS)is high,and the therapeutic effect of decompressive fasciotomy is not *** paper retrospectively reviews the modern treatment of OCS,including Western medicine and Traditional Chinese medicine(TCM),mainly in the context of the advantages of TCM in the treatment process of decompressive fasciotomy or conservative treatment to the patients who are suffering from *** was found that TCM treatment reduced the levels of serum creatine kinase(CK),lactate dehydrogenase(LDH),and aspartate aminotransferase(AST);it is beneficial to the elimination of swelling and *** adjunctive therapy promotes patients’postoperative functional recovery and decreases the occurrence of fasciotomy in patients;TCM can relieve tissue hypoxia of compartments and prevent necrosis of muscle and nerve *** treatment improves the quality of medical service and ensures the safety of OCS *** paper aims to summarize the function of TCM in the treatment of OCS,provide reference for the clinical treatment of OCS,and improve the nursing/medical outcomes of OCS.

关键词： decompressive fasciotomy nursing outcomes osteofascial compartment syndrome traditional Chinese medicine treatment quality of care

Quasi-cyclic LDPC codes with high-rate and low error floor based on Euclidean geometries

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The Journal of China Universities of Posts and Telecommunications 2012年第2期19卷 96-99页

作者： LIU yuan-hua ZHANG Mei-ling FAN Jiu-lun School of Communication and Information Engmeering Xi’an University of Posts and TelecommunicationsXi’an 710121China

An improved Euclidean geometry approach to design quasi-cyclic （QC） Low-density parity-check （LDPC） codes with high-rate and low error floor is presented. The constructed QC-LDPC codes with high-rate have lower error floor than the original codes. The distribution of the minimum weight codeword is analyzed, and a sufficient existence condition of the minimum weight codeword is found. Simulations show that a lot of QC-LDPC codes with lower error floor can be designed by reducing the number of the minimum weight codewords satisfying this sufficient condition.

关键词： low-density parity-check codes quasi-cyclic Euclidean geometry

Thiacrown Molecular Basket with High Extracting Selectivity towards Ag^+

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Chinese Chemical Letters 2006年第2期17卷 228-230页

作者： Qing Sheng LIU Shu ling GONG yuan Yin CHEN Department of Chemistry Wuhan University Wuhan 430072

By bridging 1,3：4,6-bis（3,6-dihydroxy-1,2-xylylene）tetrahydro-3a,6a-diphenyl imidazo- [4,5]-imidazole-2,5（IH,3H）-dione I with S（CH2CH2OCOCHECl）2, thiacrown molecular basket 2c was prepared for the first time. It was found that the compound exhibited very poor affinity towards alkali metal ions but high extracting selectivity towards silver ion.

关键词： Molecular basket molecular clip bridging thiacrown.

An Interesting Approach to Bis-calix[5]arene Analogue from Calix[6]arene

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Chinese Chemical Letters 2002年第3期13卷 205-206页

作者： Hai Bing LI yuan Yin CHEN Shu ling GONG Department of Chemistry Wuhan UniversityWuhan 430072

By 1,4-bridging of p-tert-butylcalix [6] arene with 2,6-bis (bromomethyl)-4-methyl- anisole, a new type of bis-calix [5] arene analogue was obtained in high yield..

关键词： Bis-calix arene calyx arene bridging.