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Design,hydrodynamic analysis,and testing of a bioinspired controllable wing mechanism with multi-locomotion modes for hybrid-driven underwater gliders

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Science China(Technological Sciences) 2021年第12期64卷 2688-2708页

作者： SUN TongShuai WANG YanHui YANG ShaoQiong WANG Cheng zhang lianhong Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education Tianjin UniversityTianjin 300072China Qingdao Pilot National Laboratory for Marine Science and Technology(QNLM) Qingdao 266237China

Hybrid-driven technology,which can improve the sailing performance of underwater gliders(UGs),has been successfully used in ocean ***,a hybrid-driven UG(HUG)with an added tail propeller is still unable to achieve backward and turning motion with a body length radius,and the hydrodynamic pitch moment acting on the HUG that is mainly caused by the fixed-wing makes it difficult to achieve high-precision attitude control during fixed-depth *** solve this problem,a two-degree-of-freedom bioinspired controllable wing mechanism(CWM)is proposed to improve the maneuverability and cruising ability of *** CWM can realize five motion modes:modifying the dihedral angle or anhedral angle,changing the frontal area of the wing,switching the wing from horizontal to be a vertical rudder,flapping the wing as propulsion,and rotating the wing as a vector ***,the design process of the CWM is provided,and hydrodynamic forces in each motion mode of three CWMs with different trailing edge sweepback angles(TESA)and attitude angles are analyzed through computational fluid dynamics *** relationship between hydrodynamics and the attitude angles or TESA of the CWM is ***,experiments are conducted to measure the hydrodynamics of the CWM when it is in a flapping wing mode and rotating the wing as a vector propeller,*** hydrodynamic forces obtained from the simulation are consistent with data measured by a force sensor,proving the credibility of the simulated ***,by applying the results of the hydrodynamic force in this study,the flapping trajectory of the wingtip is planned using the cubic spline interpolation ***,two underwater demo vehicles with a pair of CWMs are developed,and experiments are conducted in a water tank,further validating and demonstrating the feasibility of the proposed CWM.

关键词： controllable wing mechanism hybrid-driven underwater glider bioinspired design multi-locomotion modes

A Bionic Flexible-bodied Underwater Glider with Neutral Buoyancy

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Journal of Bionic Engineering 2021年第5期18卷 1073-1085页

作者： Yaqiang Zhu Yuhong Liu Shuxin Wang lianhong zhang Yanhui Wang Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education School of Mechanical EngineeringTianjin UniversityTianjin 300350China The Joint Laboratory of Ocean Observing and Detection Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China

The buoyancy of traditional Underwater Glider(UG)with a rigid hull is aff ected by the changing marine parameters,making it difficult for the vehicle to dive deeper with good motion *** the present work,the development of a novel UG for neutral buoyancy,which is equipped with a Flexible-Liquid-Rigid(FLR)composite hull,is *** innovative hull that imitates the buoyancy regulation mechanism of marine organisms is easily adaptable to the changing marine *** rigid part of the composite hull withstands hydrostatic pressure for inner function modules of the *** liquid of the composite hull mainly serves as a buoyancy compensation to mitigate the eff ect of buoyancy variation caused by the changing marine *** flexible covering provides a good hydrodynamic shape for the vehicle under the internal liquid *** buoyancy variation due to the composite hull compression as well as changes of seawater density and temperature was comprehensively considered in the design process and integrated to the dynamic *** addition,sea trials were performed to verify the motion characteristics of the proposed *** results reveal that the Flexible-bodied Underwater Glider(FUG)has a better gliding performance in practice.

关键词： Bio-inspired buoyancy regulation Flexible-bodied vehicle Composite hull Adaptable buoyancy compensation

Novel approach to and implementation of design and analysis of armored face conveyor power train

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Science China(Technological Sciences) 2015年第12期58卷 2153-2168页

作者： NIE Rui HE BaiYan YUAN PengFei zhang lianhong LI GuoPing Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education Tianjin University China Coal zhangjiakou Coal Mining Machinery Co. Ltd.

An armored face conveyor(AFC) is a key piece of equipment for a fully mechanized long-wall mining system and is currently the only means for transporting bulk material in hard coal mines. To date, the AFC power train design has mainly been based on heuristics obtained via experience, coupled with simple calculations, which cannot take the dynamic behaviors and coupling effects of the components into consideration. Therefore, model-based and simulation-driven design is preferred. In this paper, a new design and analysis methodology for an AFC power train is presented to achieve the optimal dynamic characteristics and transmission performance. A preliminary design procedure for a power train is first introduced. Then, a system-level hydro-mechatronic model of the power train is built to evaluate and optimize the preliminary scheme. Sub-models, including those for the motors, fluid couplers, gearboxes, and chain, are obtained according to their individual disciplines and assembled to form the system-level model. The chain sub-system is discretized into multiple finite elements. Governing equations are established for each element based on the Newton Euler approach and assembled according to the topological structure of the chain system. In order to make the new approach applicable for engineers, a design and analysis software is developed, with a graphical user interface that involves the whole design process. MATLAB/SIMULINK is used as the computational engine, and Visual C++ is adopted to develop the interactive software framework. Simulations for the SGZ1000/2000 type AFC are provided as an illustrative case study to validate the effectiveness and practicality of the model and software package.

关键词： Hydro-mechatronic system systematic modeling simulation-based design armored face conveyor

Dynamic Model and Motion Characteristics of an Underwater Glider with Manta-inspired Wings

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Journal of Bionic Engineering 2022年第1期19卷 1-15页

作者： Yaqiang Zhu Yuhong Liu lianhong zhang Yanhui Wang Wendong Niu Cheng Huang Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education School of Mechanical EngineeringTianjin UniversityTianjin300350China The Joint Laboratory of Ocean Observing and Detection Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao266237China

An underwater glider with bionic wings controlled by two operating modes is proposed to perform a variety of marine exploration *** system composition of the vehicle and the structural design of wings inspired by manta ray are *** bionic wings can keep outstretched or realize oscillating motions according to the operating modes of the vehicle.A universal dynamic model of the vehicle was derived from multibody ***,sailing and steering motions were simulated based on the dynamic model to illustrate the dynamic behaviors of the vehicle under different types of propulsion *** results obtained through simulated calculation are basically consistent with the experimental data,which indicate that the developed dynamic model is applicable to describe the motion characteristics of the *** were conducted in coastal area to analyze the propulsive characteristics of the bionic wings and sea trials involving multifarious motions were carried out,the applicability of the vehicle in marine environment was verified.

关键词： Underwater glider Bionic wing Oscillatory propulsion Dynamic model

基于脂组学方法分析不同危险因素的脑卒中患者预后的研究

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中国当代医药 2024年第13期31卷 29-32页

作者：刘建平高慧张莲红江西省九江市第一人民医院神经内科江西九江332000

目的探讨基于脂组学方法分析不同危险因素的脑卒中患者预后的研究。方法回顾性分析九江市第一人民医院2021年2月至2023年2月收治的120例缺血性脑卒中(AIS)患者的临床资料治疗3个月后将其按预后情况分为良好组(n=82)和不良组(n=38)。分... 详细信息

目的探讨基于脂组学方法分析不同危险因素的脑卒中患者预后的研究。方法回顾性分析九江市第一人民医院2021年2月至2023年2月收治的120例缺血性脑卒中(AIS)患者的临床资料治疗3个月后将其按预后情况分为良好组(n=82)和不良组(n=38)。分析患者年龄、性别、吸烟史、饮酒史、高血压、高脂血症、糖尿病、脑卒中家族遗传史、总胆固醇(TC)、三酰甘油(TG)、糖化血红蛋白(HbA1c)、低密度脂蛋白胆固醇(LDL-C)水平对AIS患者预后的影响。结果全部纳入研究的120例AIS患者中,有38例患者出现预后不良,发生率为31.67%;有82例预后良好,发生率为68.33%。单因素分析结果提示,两组性别、吸烟史、饮酒史、高血压、高脂血症、糖尿病、脑卒中家族遗传史比较,差异无统计学意义(P>0.05);两组患者年龄、TC、TG、HbA1c以及LDL-C比较,差异有统计学意义(P<0.05)。多因素分析结果提示,年龄(β=0.266,OR=1.304,95%CI=1.136~1.498)、HbA1c(β=0.838,OR=2.312,95%CI=1.269~4.212)、LDL-C(β=1.662,OR=5.269,95%CI=2.178~12.745)是AIS患者预后不良的危险因素(P<0.05)。结论年龄、HbA1c、LDL-C是AIS患者预后不良的危险因素。可根据上述因素进行针对性干预,以期减少AIS患者预后不良的发生率。

关键词：脑卒中糖化血红蛋白低密度脂蛋白胆固醇预后脂组学

非瓣膜性房颤患者服用达比加群酯后出血风险预测模型构建

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药品评价 2024年第3期21卷 348-352页

作者：朱子云张莲红刘宇恒九江市第一人民医院江西九江332000

目的分析非瓣膜性房颤患者服用达比加群酯后出血风险的相关因素和构建风险预测模型。方法选取2020年6月至2023年6月九江市第一人民医院收治的187例非瓣膜性房颤患者作为研究对象,根据是否发生出血进行分组,分为出血组(n=50)和非出血组... 详细信息

目的分析非瓣膜性房颤患者服用达比加群酯后出血风险的相关因素和构建风险预测模型。方法选取2020年6月至2023年6月九江市第一人民医院收治的187例非瓣膜性房颤患者作为研究对象,根据是否发生出血进行分组,分为出血组(n=50)和非出血组(n=137)。使用Logistic回归构建预测风险模型,受试者工作曲线(ROC)、Homster-Lemeshow拟合优度检验(H-L)对模型进行性能评价。并另选50例非瓣膜性房颤患者的临床资料进行模型外部验证。结果 187例非瓣膜性房颤患者发生出血的概率为26.74%。根据单因素和Logistic多因素分析,高达比加群酯剂量、出血风险评估(HAS-BLED)评分、活化部分凝血活酶时间(APTT)、D-二聚体(D-D)是非瓣膜性房颤患者是否发生出血的危险因素,高水平肌酐清除率(Ccr)是其保护因素。内部验证H-L检验结果显示,χ^(2)=2.23,P>0.05,模型拟合情况良好;ROC曲线下面积为0.811(P0.05,模型拟合情况良好;ROC曲线下面积为0.888(P<0.001,95%CI 0.797~0.980),灵敏度为76.70%,特异性为95.00%,最大约登指数为0.717。结论高达比加群酯剂量、HAS-BLED评分、APTT、D-D是非瓣膜性房颤患者是否发生出血的危险因素,高水平Ccr是其保护因素。其建立的风险预警模型具有较好的预测效能,可用于非瓣膜性房颤患者服用达比加群酯后发生出血风险的早期预测。

关键词：非瓣膜性房颤达比加群酯出血模型预测

Macroporous 3D carbon-nitrogen(CN)confined MoO_(x) catalyst for enhanced oxidative desulfurization of dibenzothiophene

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Chinese Chemical Letters 2020年第10期31卷 2819-2824页

作者： Jinmei Ye Jie Wen Dongdong Zhao Peilun zhang Airong Li lianhong zhang Hui zhang Mengqi Wu Center for Computational Chemistry and Molecular Simulation College of Chemistry and Chemical EngineeringSouthwest Petroleum UniversityChengdu 610500China Department of Chemical and Biological Engineering Case Western Reserve UniversityClevelandOH 44120United States

Macroporous 3D carbon doped with nitrogen confined Mo catalyst(MoO_(x)@CN)had been prepared by a facile one-step pyrolysis technique using silica as a template and was employed for oxidative desulfurization(ODS)of dibenzothiophene(DBT)in model fuel with H2O_(2) as *** effect of different ope rating conditions(i.e.,reaction te mperature and time,catalyst dosage,H2O_(2)/DBT(O/S)molar ratio)were also systematic *** the optimal reaction condition,MoO_(x)@CN catalyst exhibited highly excellent ODS performance toward DBT,the highest sulfur removal efficiency can be up to 99.9%and sulfur content was wiped out from 800 ppm to 10 *** to the robust 3D structure promoting rapid transfer,in addition to the increased number of active sites induced by the Mo vacancies,the catalyst,prepared using chitosan and ammonium heptamolybdate in a mass ratio of 1:0.5,displayed rapid kinetics and low activation energy in the oxidation of ***,it exhibited excellent recyclability after five cycles without any obvious decrease in catalytic activity for the oxidative desulfurization reaction.

关键词： O_(x)idation desulfurization Carbon-nitrogen confined MoO_(x) Mo vacancies Dibenzothiophene Nanoparticles

Removal of Heteroaromatic Sulfur Compounds by a Non-noble Metal Fe Single-atom Adsorbent

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China Petroleum Processing & Petrochemical Technology 2022年第2期24卷 46-57页

作者： LüYanjun Wen Jie Gong Qinmei zhang lianhong Li Airong Arshid Mahmood Ali zhang Hui College of Chemistry and Chemical Engineering Southwest Petroleum UniversityChengdu 610500

Sulfur-containing compounds(SCCs)must be removed from fuels before *** this study,a novel non-noble metal Fe single-atom adsorbent(SA-Fe/CN)was synthesized using a core-shell strategy and applied for the adsorptive removal of benzothiophene(BT)and dibenzothiophene(DBT).The adsorption isotherms,thermodynamics,kinetics,and adsorption-regeneration cycles of DBT and BT on SA-Fe/CN were ***-Fe/CN exhibited a significant capacity to adsorb DBT,and the isothermal equilibrium was well described by the Langmuir *** Gibbs free energy values were negative(ΔG^(0)<0),indicating that the adsorption of DBT and BT was favored and *** adsorption process conformed to the pseudo-second-order kinetic model with high R^(2) values(0.9994,0.9987).The adsorption capacity of SA-Fe/CN for DBT and BT reached 163.21 mg/g and 90.35 mg/g,respectively,due to the highly active sites of the single atom and electrostatic interaction with the ***,SA-Fe/CN may be a promising adsorbent for SCC removal.

关键词： single-atom adsorbent adsorptive desulfurization thermodynamics and kinetics heteroaromatic sulfur compounds

“戏”说革命: “反历史主义”戏改倾向及其文艺阐释系统再考察

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社会科学 2013年第10期 174-182页

作者：张炼红上海社会科学院文学研究所

"新中国"戏曲改革运动对于重塑民族国家理想、变革政治文化体制、建构人民主体形象等具有标志性和寓言式的历史蕴涵。在有关"反历史主义"的戏改倾向及其大讨论中,国家政治意识形态本身所含的诸多要求之间彼此牵掣而产生的种种张力与制约... 详细信息

"新中国"戏曲改革运动对于重塑民族国家理想、变革政治文化体制、建构人民主体形象等具有标志性和寓言式的历史蕴涵。在有关"反历史主义"的戏改倾向及其大讨论中,国家政治意识形态本身所含的诸多要求之间彼此牵掣而产生的种种张力与制约,即通过政策实践、文艺批评、讨论乃至批判等文化生产机制来发挥其内部新陈代谢的自我调控功能。这也就是主导着旧剧改造及其文艺阐释系统的意识形态威力与限度之所在。

关键词：新中国戏曲改革运动国家政治意识形态文艺阐释系统