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双因子显式二阶积分法

Printing perovskite and graphene parallel structure-based optical-mechanical sensors for human-machine interaction

工程力学 2025年第1期42卷 20-31页

作者：刘慧鹏刘付钧周福霖傅向荣广州大学工程抗震中心广州510006 广州容联建筑科技有限公司广州510180 中国农业大学土木工程系北京100083

研究了一类超收敛的显式二阶积分方法。该方法从哈密顿体系动力相场出发，利用二阶泰勒展开式，构造了动力时程分析迭代算法的基本格式。采用高斯积分处理在迭代步内荷载项的积分，并引入超收敛因子\begin{document}$ \alpha $\end{docu... 详细信息

研究了一类超收敛的显式二阶积分方法。该方法从哈密顿体系动力相场出发，利用二阶泰勒展开式，构造了动力时程分析迭代算法的基本格式。采用高斯积分处理在迭代步内荷载项的积分，并引入超收敛因子\begin{document}$ \alpha $\end{document}和\begin{document}$ \beta $\end{document}来提高算法的收敛步长和计算稳定性。该方法避免了整体刚度矩阵的求逆和相乘，因此不需要进行整体刚度矩阵的组集，是一种快速的新型动力显式积分法。引入超收敛因子后，该算法可大幅提高收敛步长，可在理论时间步长下稳定收敛。数值算例表明：双因子超收敛显式二阶积分法比传统精细积分法具有更高算法稳定性和精度;在合适分析步长下可与常用积分算法保持一致的精度和稳定性，且随着分析步长的增大具有更好的精度稳定性。

关键词：精细积分显式积分超收敛动力时程分析哈密顿体系

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Science China Technological Sciences 2025年

作者： Sisi CHEN Jiemin ZHANG Nan CHENG Wenbo LI jing liu Hongfei XIE Jie ZHANG Yueying CHENG Xiaotong ZHAO Meng SU Yanlin SONG Key Laboratory of Green Printing CAS Research/Education Center for Excellence in Molecular Sciences Institute of ChemistryChinese Academy of Sciences (ICCAS) University of Chinese Academy of Sciences Weiyang College Tsinghua University Department of Cardiovascular Surgery First Medical Center PLA General Hospital AECC Beijing Institute of Aeronautical Materials Beijing Institute of Graphene Technology Beijing Engineering Research Centre of Graphene Application School of Integrated Circuit & Beijing National Research Center for Information Science and Technology (BNRist) Tsinghua University

Surgical robots are designed to provide enhanced precision and dexterity compared to manual surgical procedures,which mainly rely on multimodal sensing technologies for the surgeon to seamlessly operate the robotic arms and *** with single-mode sensors, optical and mechanical bi-modal sensors provide improved precision, enhanced safety,and robustness of human-machine interaction systems. Here, the template-guided and pneumatic printing technologies are combined to construct perovskite and graphene parallel structures with both optical and mechanical sensing capabilities. The printed uniformly crystallized perovskite microstructure exhibits fast and sensitive photoelectric response characteristics,enabling shadow recognition functionality. The combination of graphene and elastic rubber endows the great printability to prepare parallel structures near the perovskite arrays for force sensing capabilities. Thus, the printed perovskite and graphene structures possess non-contact optical sensing capabilities to detect hand position by recognizing shadows between the hand and the sensor, as well as contact mechanical sensing capabilities to detect touch force applied by the hand. It provides a synergistic platform for real-time and multidimensional feedback to improve human-machine interaction.

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Influences of Inflow Condition on Non-Axisymmetric Flows in Turbine Exhaust Hoods

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Journal of Thermal Science 2008年第4期17卷 305-313页

作者： jing-Lun fu Jian-Jun liu Institute of Engineering ThermophysicsChinese Academy of Sciences Beijing 100190 China

The complex 3D flow in a steam turbine exhaust hood model with different inlet swirl and inlet total pressure radial distributions has been simulated by employing CFX-5 and analyzed in this paper. It＇s found that the inlet tangential flow angle at hub has a negative effect on the exhaust hood performance, while a negative gradient of inlet total pressure radial distribution has a positive impact on the hood performances. It＇s also numerically con- firmed that a proper distribution of total pressure at hood inlet can successfully eliminate the negative effects caused by the inappropriate inlet swirl distribution and improve the hood aerodynamic performance.

关键词： turbine exhaust hood inflow conditions non-axisymmetric flow

Investigations on the Improving Aerodynamic Performances of Last Stage Steam Turbine and Exhaust Hood under Design and Off Design Conditions

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Journal of Thermal Science 2015年第5期24卷 468-477页

作者： fu jing-Lun liu Jian-Jun Key Laboratory of Advanced Energy and Power Institute of Engineering Thermophysics

The purpose of this paper is to improve the aerodynamic performances of the last stage turbine and the exhaust hood of a 600MW steam turbine under design and off design conditions. During operation, strong flow interactions between the turbine and the exhaust hood impose influences on the flow behavior in the hood and lead to the unsatisfactory aerodynamic performance of the turbine and exhaust hood. So the exhaust hood has the potential to be improved in terms of aerodynamic efficiency. Considering the flow interactions between the turbine and the exhaust hood, the profiles of the diffuser end-wall were optimized. The coupled model turbine and model exhaust hood calculations and experiments were carried out to validate the effects of the optimization. Model experiments show that the design modifications resulted in a substantial increase in the overall pressure recovery coefficient. The flow and aerodynamic performances of the full-scale last stage turbine and full-scale exhaust hood were simulated to explore the flow physics alterations to the modification of diffuser geometry. The wet steam was selected as the flow medium. The actual flow fields trader different operation conditions were analyzed.

关键词： steam turbine exhaust hood full scale coupling flow

The Influence of Co Addition on Phase Transformation Behavior and Mechanical Properties of TiNi Alloys

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Chinese Journal of Aeronautics 2007年第2期20卷 153-156页

作者： jing Rui-rui liu fu-shun School of Materials Science and Engineering Beijing University of Aeronautics and Astronautics Beijing 100083 China

The influences of Co-addition on phase transformation behavior and mechanical properties of TiN/alloys were investigated. Resuits indicate that, as a substitute for Ni, Co added to TiNi alloys can dramatically decrease the martensite transformation temperature, and R phase transformation and martensite transformation are accordingly separated. When Co-content reach 10 at.%, the martensite transformation temperature is lower than that of liquid nitrogen. During deformation at room temperature, Ti50Ni48Co2 alloy exhibits good ductility with a lower stress plateau caused by stress-induced martensite and martensite reorientation.

关键词： TiNiCo shape memory alloy martensite transformation mechanical property

Comparison of Catalytical and Biological Activities for Substituted Polyoxotungstates Containing Ti and CpTi

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Chemical Research in Chinese Universities 2003年第1期19卷 20-23页

作者： liu jing-fu WANG Xiao-hong 等 InstituteofPolyoxometalateChemistry FacultyofChemistryNortheastNormalUniversityChangchun130024P.R.China InstituteofPolyoxometalateChemistry FacultyofChemistryNortheastNormalUnivers

The effect of the functionallization of POMs on their properties was examined by the comparison between both titanium and its corresponding cyclopentadienyl subsituted polyoxocomplexes. The polarographic half wave potential of the complexes indicated that the effect of the functionallization of POMs increased the oxidizing ability of the polyoxoanions. The inhibitory effects of the CpTi polyoxocomplexes on tumor cells are higher than those of the corresponding titanium polyoxocomplexes, and the toxicity of the former is lower than that of the latter. The oxygenation reactions of cyclohexene, styrene, trans stilbene and maleic acid with PhIO or hydrogen peroxide(30% aqueous solution) catalyzed respectively by Ti and CpTi polyoxocomplexes were compared.

关键词： Polyoxometalate Titanium substituted polyoxotungstate 183 W NMR Antitumor activity

Facile synthesis of the dodecahydridododecaborate (B12H122-) from borane Lewis base adducts

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Science China Chemistry 2025年

作者： Yi jing Xin-Ran liu Xing-Hua Wang Hui Han Sha-Sha Liang Xi-Meng Chen Dong-Hui Wei Lai-Sheng Wang Xue-Nian Chen College of Chemistry Zhengzhou University School of Chemistry and Chemical Engineering Henan Key Laboratory of Boron Chemistry and Advanced MaterialsHenan Normal University Department of Chemistry Brown University

Polyhedral boranes are a class of well-known boron molecular clusters widely used in energy,chemistry,medicine,and materials science because of their unique physical and chemical *** efforts have been made in the past decades to find more effective synthetic methods for this important class of boron ***,existing synthetic methods suffer from low efficiency and low ***,we report a facile one-pot synthesis of[（CH3）3S]2B12H12with moderate yields at mild *** mechanisms for the multi-step chemoselective synthesis of B12H122-without other by-products are elucidated based on theoretical results and our previous *** Lewis base used in B–H bond condensation reaction,which acts as a hydrogen or to balance the newly generated polyhedral borane charges,is proposed and studied in *** current study has led to a more effective and selective synthetic method for B12H122-and has also implicated the syntheses of other new polyhedral boranes.

关键词：

Synthesis,Characterization　and　Catalytic　Activity　of　Polyoxometalates　Derived　from　α-P₂W₁₅O₅6⁽12

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Chemical Research in Chinese Universities 1998年第1期14卷 1-5页

作者： Meng, Lu liu, jing-fu NE Normal Univ Dept Chem Changchun 130024 Peoples R China

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Ｓｙｎｔｈｅｓｉｓ，ＣｈａｒａｃｔｅｒｉｚａｔｉｏｎａｎｄＣａｔａｌｙｔｉｃＡｃｔｉｖｉｔｙｏｆＰｏｌｙｏｘｏｍｅｔａｌａｔｅｓＤｅｒｉｖｅｄｆｒｏｍα－Ｐ;Ｗ;Ｏ;６;ＬｉｇａｎｄＭＥＮＧＬｕ，ａｎｄＬＩＵＪｉｎｇ－ｆｕ(Ｄｅｐａ...

关键词： Activity Polyoxometalates Catalytic

Sine oculis homeobox homolog family function in gastrointestinal cancer:Progression and comprehensive analysis

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World Journal of Clinical Oncology 2025年第1期16卷 10-24页

作者： Yang-Zheng Lan Zheng Wu Wen-Jia Chen Xin-Ning Yu Hua-Tao Wu jing liu Department of The Breast Center Cancer Hospital of Shantou University Medical CollegeShantou 515041Guangdong ProvinceChina Department of General Surgery First Affiliated Hospital of Shantou University Medical CollegeShantou 515041Guangdong ProvinceChina

The sine oculis homeobox homolog(SIX)family,a group of transcription factors characterized by a conserved DNA-binding homology domain,plays a critical role in orchestrating embryonic development and organogenesis across various organisms,including *** six distinct members,from SIX1 to SIX6,each member contributes uniquely to the development and differentiation of diverse tissues and organs,underscoring the versatility of the SIX *** or mutations in SIX genes have been implicated in a spectrum of developmental disorders,as well as in tumor initiation and progression,highlighting their pivotal role in maintaining normal developmental trajectories and cellular *** to target the transcriptional complex of the SIX gene family have emerged as a promising strategy to inhibit tumor *** the development of inhibitors targeting this gene family is still in its early stages,the significant potential of such interventions holds promise for future therapeutic ***,this review aimed to comprehensively explore the advancements in understanding the SIX family within gastrointestinal cancers,focusing on its critical role in normal organ development and its implications in gastrointestinal cancers,including gastric,pancreatic,colorectal cancer,and hepatocellular *** conclusion,this review deepened the understanding of the functional roles of the SIX family and explored the potential of utilizing this gene family for the diagnosis,prognosis,and treatment of gastrointestinal cancers.

关键词： Sine oculis homeobox homolog Gastrointestinal cancer Transcription factor Development Regulation Diagnosis Therapeutics