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Synthetical Efficiency-based Optimization for the Power Distribution of Power-split Hybrid Electric Vehicles

Chinese Journal of Mechanical Engineering 2014年第1期27卷 58-68页

作者： WANG Weida han lijin XIANG Changle MA Yue LIU Hui National Key Laboratory of Vehicle Transmission Beijing Institute of Technology

Now the optimization strategies for power distribution are researched widely, and most of them are aiming to the optimal fuel economy and the driving cycle must be preknown. Thus if the actual driving condition deviates from the scheduled driving cycle, the effect of optimal results will be declined greatly. Therefore, the instantaneous optimization strategy carried out on-line is studied in this paper. The power split path and the transmission efficiency are analyzed based on a special power-split scheme and the efficiency models of the power transmitting components are established. The synthetical efficiency optimization model is established for enhancing the transmission efficiency and the fuel economy. The identification of the synthetical efficiency as the optimization objective and the constrain group are discussed emphatically. The optimization is calculated by the adaptive simulated annealing （ASA） algorithm and realized on-line by the radial basis function （RBF）-based similar models. The optimization for power distribution of the hybrid vehicle in an actual driving condition is carried out and the road test results are presented. The test results indicate that the synthetical efficiency optimization method can enhance the transmission efficiency and the fuel economy of the power-split hybrid electric vehicle （HEV） observably. Compared to the rules-based strategy the optimization strategy is optimal and achieves the approximate global optimization solution for the power distribution. The synthetical efficiency optimization solved by ASA algorithm can give attentions to both optimization quality and calculation efficiency, thus it has good application foreground for the power distribution of power-split HEV.

关键词： hybrid electric vehicles power-split synthetical efficiency-based optimization power distribution road test

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水下搅拌摩擦加工Ti-15-3合金的组织及超塑性变形

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兵器材料科学与工程 2024年第4期47卷 59-63页

作者：倪立锦王文韩鹏乔柯强凤鸣王快社西安建筑科技大学冶金工程学院陕西西安710055

采用水下搅拌摩擦加工技术制备细晶Ti-15V-3Al-3Cr-3Sn(Ti-15-3)合金。通过电子背散射衍射对搅拌区(stirring zone,SZ)晶粒细化机制进行分析。用电子万能试验机对SZ试样进行超塑性拉伸。结果表明:SZ高角度晶界比例为74.5%,平均晶粒尺寸... 详细信息

采用水下搅拌摩擦加工技术制备细晶Ti-15V-3Al-3Cr-3Sn(Ti-15-3)合金。通过电子背散射衍射对搅拌区(stirring zone,SZ)晶粒细化机制进行分析。用电子万能试验机对SZ试样进行超塑性拉伸。结果表明:SZ高角度晶界比例为74.5%,平均晶粒尺寸为1.8μm,主要的晶粒细化机制为连续动态再结晶;在变形温度为675℃,应变率为3×10^(-4)s^(-1)时,SZ试样的伸长率达到了465%,为超塑性,主要变形机制为晶界滑移,同时伴随连续动态再结晶和β→α相变。

关键词：水下搅拌摩擦加工 Ti-15-3合金显微组织超塑性晶界滑移

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Using Natural Radionuclides to Trace Sources of Suspended Particles in the Lower Reaches of the Yellow River

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Journal of Ocean University of China 2024年第1期23卷 99-108页

作者： ZhanG han BURNETT CWilliam ZhanG Xiaojie ZHAO Shibin YANG Disong NAN Haiming YU Zhigang XU Bochao Frontiers Science Center for Deep Ocean Multispheres and Earth System and Key Laboratory of Marine Chemistry Theory and TechnologyMinistry of EducationOcean University of ChinaQingdao 266100China Laboratory for Marine Ecology and Environmental Science Qingdao National Laboratory for Marine Science and TechnologyQingdao 266071China College of Chemistry and Chemical Engineering Ocean University of ChinaQingdao 266100China Department of Earth Ocean and Atmospheric ScienceFlorida State UniversityTallahasseeFL 32306USA North China Sea Environmental Monitoring Center State Oceanic AdministrationKey Laboratory of Ecological Prewarning and Protection of Bohai SeaMNRQingdao 266033China Shandong Provincial Key Laboratory of Marine Ecological Environment and Disaster Prevention and Mitigation Qingdao 266033China

Natural radionuclides are powerful tools for understanding the sources and fate of suspended particulate matter(SPM).Particulate matter with different particle sizes behaves differently with respect to adsorption and desorption.We analyzed the activi-ties and distribution characteristics of multiple natural radionuclides(238U,226Ra,40K,228Ra,7Be and 210Pbex)on size-fractionated SPM at the lijin Hydrographic Station(Huanghe or Yellow River)every month over a one-year period.Results showed that medium silt(16–32µm)was the main component.As expected,the activity of each radionuclide decreased with an increase of particle size.We examined the sources of SPM with different particle sizes using activity ratios of 226Ra/238U,228Ra/226Ra,40K/238U and 7Be/210Pbex,and concluded that SPM with different particle sizes originated from different sources.Our results indicate that fine SPM(32µm)was mainly derived from resuspension of riverbed sediment.During high runoff periods,the concentration of SPM increased significantly,and the pro-portion of fine particles originating upstream increased.Naturally occurring radioactive isotopes,especially on size-fractionated par-ticles,are therefore seen as useful tracers to understand the sources and behaviors of riverine particles transported from land to sea.

关键词： the Yellow River suspended particulate matter size-fractions radionuclides sediment sources water elutriator

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大庆外围采油厂油气和新能源融合转型发展潜力分析

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石油石化节能与计量 2024年第3期14卷 63-69页

作者：仇立锦韩祥慧彭启忠大庆油田有限责任公司第八采油厂 163814 大庆油田有限责任公司新能源事业部 163814

为实现可持续发展和低碳转型,根据外围“三低”油田的开发特点,分析当前面临的形势、用能和碳排放构成以及油区内新能源发展优势,明确外围采油厂电力为第一减碳目标,其次是天然气。在此基础上,提出外围某采油厂油气和新能源融合低碳转... 详细信息

为实现可持续发展和低碳转型,根据外围“三低”油田的开发特点,分析当前面临的形势、用能和碳排放构成以及油区内新能源发展优势,明确外围采油厂电力为第一减碳目标,其次是天然气。在此基础上,提出外围某采油厂油气和新能源融合低碳转型发展思路,并从技术融合、建设融合、开发融合、管理融合四方面论述了节能、清洁替代、增储、低碳生产的可行性及发展潜力。通过潜力分析,“十五五”末新增储量9011×10^(4)t,吨液生产综合能耗降幅、碳排放降幅分别为28.7%、52.6%,清洁能源利用率61.7%,可实现外围某采油厂可持续、低碳转型发展,也为外围其他采油厂绿色低碳发展提供技术理论支撑。

关键词：外围油田低碳转型融合发展风力发电光伏发电

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Skid Steering Control Strategy of Distributed Drive Unmanned Platform

Skid Steering Control Strategy of Distributed Drive Unmanned...

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2022中国汽车工程学会年会暨展览会

作者： Xie Jingshuo han lijin Ren Xiaolei Liu Hui National Key Lab of Vehicular Transmission Beijing Institute of Technology Advanced Technology Research Institute(Jinan) Beijing Institute of Technology

This paper proposes a control strategy aiming at the lateral and longitudinal motion performance for the skid steering distributed drive unmanned platform.Firstly,through the mechanic' s theory,a seven-degree-of-freedom model of the skid steering vehicle is established,including the body dynamics model,the wheel dynamics model,and the tire model.Secondly,a hierarchical control strategy is designed.The upper layer calculates the expected path as the expected value of wheel speed and yaw rate based on pre-targeting theory and vehicle kinematics reference model;the lower layer control structure is based on model predictive control,the control problem under the platform's lateral and longitudinal composite motion conditions is transformed into the tracking problem of the target wheel speed and the target yaw rate.The torque of the wheel is the output,which realizes the lateral and longitudinal synthetic control of the unmanned platform,and takes into account the optimal control of the wheel slip rate.A simulation model is built in Simulink software,and the corresponding simulation conditions are verified.The results show that the proposed lateral and longitudinal motion control strategy for skid steering unmanned platform is stable and accurate.

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刺梨果多糖对肺腺癌A549细胞增殖、凋亡的作用及机制研究

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中药新药与临床药理 2024年第4期35卷 484-492页

作者：李倩倩李自霖刘涵黄丽金王涵杨紫焰陈贵元张翠香大理大学基础医学院云南大理671000 云南省昆虫生物医药研发重点实验室云南大理671000

目的探讨刺梨果多糖对肺腺癌A549细胞增殖、凋亡的作用及机制。方法在0、2、4、6、8、10 g·L^(-1)刺梨果多糖干预A549细胞24、48、72 h后,采用CCK-8法检测A549细胞增殖情况。在0、2、6、10 g·L^(-1)刺梨果多糖干预A549细胞24、48 h后... 详细信息

目的探讨刺梨果多糖对肺腺癌A549细胞增殖、凋亡的作用及机制。方法在0、2、4、6、8、10 g·L^(-1)刺梨果多糖干预A549细胞24、48、72 h后,采用CCK-8法检测A549细胞增殖情况。在0、2、6、10 g·L^(-1)刺梨果多糖干预A549细胞24、48 h后,采用细胞划痕实验测定A549细胞的迁移情况;Transwell实验测定A549细胞侵袭情况。在0、2、6、10 g·L^(-1)刺梨果多糖干预A549细胞48 h后,采用流式细胞术(PI单染法)测定A549细胞周期;流式细胞术(Annexin V-FITC/PI双染法)测定A549细胞的凋亡情况;Real-Time PCR法测定A549细胞的周期、凋亡相关基因表达水平;Western Blot法测定A549细胞的周期、凋亡相关蛋白表达水平。结果(1)干预24、48、72 h后,与对照组(0 g·L^(-1))比较,刺梨果多糖2、4、6、8、10 g·L^(-1)组的A549细胞生长受到显著抑制,细胞的存活率显著降低(P<0.05,P<0.01),刺梨果多糖干预48 h的IC50值为6.109 g·L^(-1),后续实验采用2、6、10 g·L^(-1)浓度作为刺梨果多糖低、中、高剂量。(2)干预48 h后,与对照组比较,刺梨果多糖2、6、10 g·L^(-1)组的A549细胞迁移距离显著增加(P<0.05,P<0.01),细胞侵袭数量显著减少(P<0.05,P<0.01);刺梨果多糖6、10 g·L^(-1)组的G0/G1期、G2/M期细胞比例均显著升高(P<0.05,P<0.01),S期的细胞比例显著降低(P<0.01);刺梨果多糖2、6、10 g·L^(-1)组A549细胞的G0/G1、G2/M期相关调控因子CDK-4、CDK-6、CyclinD1、CDK-1、CyclinB1 mRNA及蛋白表达水平均显著下调(P<0.05,P<0.01);A549细胞的凋亡率均显著升高(P<0.01);凋亡相关基因Caspase-3、Caspase-8、Caspase-9 mRNA表达显著上调(P<0.05,P<0.01);促凋亡Bax、Caspase-3、Caspase-8、Caspase-9蛋白表达显著上调(P<0.05,P<0.01),抗凋亡Bcl-2蛋白表达显著下调(P<0.05,P<0.01)。结论刺梨果多糖能够抑制A549细胞的增殖、迁移和侵袭,阻滞细胞周期于G0/G1和G2/M期,并通过线粒体通路和死亡受体通路诱导A549细胞凋亡。

关键词：刺梨果多糖肺腺癌A549细胞细胞增殖迁移侵袭细胞周期细胞凋亡

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Motion Control Strategy of Wheel-Legged Compound Unmanned Vehicle

Motion Control Strategy of Wheel-Legged Compound Unmanned Ve...

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2022中国汽车工程学会年会暨展览会

作者： Ren Xiaolei Liu Hui Xie Jingshuo Qin Yechen han lijin Liu Baoshuai National Key Lab of Vehicular Transmission Beijing Institute of Technology Advanced Technology Research Institute (Jinan) Beijing Institute of Technology

This paper proposes a motion control strategy for the wheel-legged compound unmanned vehicle,including attitude control and driving control.Firstly,based on tire mechanics,Lagrangian method and D'Alembert's principle,the dynamic modeling of the driving system,wheel-legged system and vehicle body is carried out respectively.On this basis,a layered parallel control architecture is proposed.The upper-level controller consists of a driving system controller and a wheel-legged system controller.The former is used to control the longitudinal,lateral and yaw motions of the vehicle based on the model predictive control method,and the latter is used to adjust the longitudinal,pitch and roll motions of the vehicle based on PD control.The lower-level controller is used to control the output torque of the vehicle motor based on the PI control method.Finally,three typical working conditions are designed to verify the attitude control and driving control of the vehicle.The simulation results show the accuracy and stability of the designed controller to track the target command.

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Halogen chlorine triggered oxygen vacancy-rich Ni(OH)_(2) with enhanced reaction kinetics for pseudocapacitive energy storage

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Journal of Energy Chemistry 2023年第7期82卷 296-306,I0007页

作者： Jiangyu Hao lijin Yan Liang Luo Qiaohui Liu Youcun Bai Yuying han Yang Zhou Xuefeng Zou Bin Xiang School of Chemistry and Chemical Engineering Chongqing UniversityChongqing 400044China Analytical and Testing Center Chongqing UniversityChongqing 400044China Guizhou Provincial Key Laboratory of Computational Nano-Material Science Guizhou Education UniversityGuiyang 550018GuizhouChina School of Materials Science and Engineering Institute of Materials Science and DeviceSuzhou University of Science and TechnologySuzhou 215009JiangsuChina

Two-dimensional (2D)Ni(OH)_(2) nanosheets can theoretically expose their active sites of 100%.Whereas,their intrinsic easy accumulation and low conductivity lead to weak and unsustainable reaction kinetics.Herein,we propose a novel halogen chlorine-triggered electrochemical etching strategy to controllably manage the reaction kinetics of 2D Ni(OH)_(2) nanosheets(EE/Cl-Ni(OH)_(2)).It is found that halogen chlorine doping can adjust the interlamellar spacing flexibly and promote the lattice oxygen activation to achieve controlled construction of superficial oxygen defects at the adjustable voltage.The optimal EE/Cl-Ni(OH)_(2) electrode exhibits a high rate capability and excellent specific capacity of 206.9 mA h g^(-1) at 1 A g^(-1) in a three-electrode system,which is more than twice as high as the pristine Ni(OH)_(2).Furthermore,EE/Cl-Ni(OH)_(2) cathode and FeOOH@rGO anode are employed for developing an aqueous Ni-Fe battery with an excellent energy density of 83 W h kg^(-1),a high power density of 17051 W kg^(-1),and robust durability over 20,000 cycles.This strategy exploits a fresh channel for the ingenious fabrication of highefficiency and stable nickel-based deficiency materials for energy storage.

关键词： Ni(OH)_(2) Electrochemical etching Lattice defects High energy density Ni-Fe battery

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In-situ cation-inserted MnO_(2) with selective accelerated intercalation of individual H^(+) or Zn^(2+) ions in aqueous zinc ion batteries

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Journal of Energy Chemistry 2023年第7期82卷 88-102,I0003页

作者： lijin Yan Baibai Liu Jiangyu Hao Yuying han Chong Zhu Fuliang Liu Xuefeng Zou Yang Zhou Bin Xiang College of Chemistry and Chemical Engineering Chongqing UniversityChongqing 401331China College of Optoelectronic Engineering Chongqing UniversityChongqing 400044China Guizhou Meiling Power Co. Zunyi 563099GuizhouChina Nanjing University of Aeronautics and Astronautics Nanjing 210016JiangsuChina Guizhou Provincial Key Laboratory of Computational Nano-Material Science Guizhou Normal UniversityGuiyang 550018GuizhouChina Analytical and Testing Center of Chongqing University Chongqing UniversityChongqing 401331China

The recognized energy storage mechanism of neutral aqueous zinc-manganese batteries is the co-insertion/extrusion of H^(+) and Zn^(2+) ions.However,modulating the kinetics of a single H^(+) or Zn^(2+) ion is scarce,which can provide meaningful insights into the energy storage mechanism of Zn ion batteries.Herein,a distinctive doubly electric field in-situ induced cationic anchoring of two-dimensional layered MnO_(2) is successfully constructed to modulate the insertion/extrusion of a single H^(+) or Zn^(2+) ion.As a result,regulating the intercalation of different metal ions can precisely achieve the accelerated induction for the individual H^(+) or Zn^(2+) ions intercalation/deintercalation.Moreover,the introduction of metal ions stabilizes the lattice distortion and alleviates the irreparable structural collapse,leading to an increase in the H^(+)/Zn^(2+) storage sites,efficiently diminishing the stagnation of the ordered structure and creating the more open channels,which is conducive to facilitating the diffusion of ions.This work delivers some innovative insights into pre-embedding strategies,and also serves as a precious reference for the cathode development of advanced aqueous batteries.

关键词： In-situ inductions Manganese dioxide Insertion mechanisms Zinc-ion batteries

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北京房山区心房颤动脑卒中高危老年人群抗凝治疗调查

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脑与神经疾病杂志 2024年第5期32卷 297-301页

作者：马云峰孟庆伟韩文芹伊丽瑾王朝斌北京市房山区良乡医院神经内科北京102401

目的通过调查北京市房山区心房颤动(AF)脑卒中高危老年人群的抗凝治疗现状及原因分析,为AF脑卒中高危老年人群规范化的抗凝治疗提供临床依据。方法通过社区体检筛选AF脑卒中65岁及以上高危人群,调查问卷发现AF脑卒中高危人群的抗凝治疗... 详细信息

目的通过调查北京市房山区心房颤动(AF)脑卒中高危老年人群的抗凝治疗现状及原因分析,为AF脑卒中高危老年人群规范化的抗凝治疗提供临床依据。方法通过社区体检筛选AF脑卒中65岁及以上高危人群,调查问卷发现AF脑卒中高危人群的抗凝治疗现状:结果(1)筛选出符合纳入标准且不存在排除标准AF患者共703例,其中299例(42.5%)患者接受了抗凝治疗,华法林145例,利伐沙班86例,达比加群68例。65~74岁、75~90岁、>90岁3个不同年龄段年龄越大抗凝比例越低,差异有统计学意义(P<0.05);(2)在703例AF患者中267例患脑梗死,其中抗凝109例(40.8%)。无脑梗死患者436例,抗凝为191例(43.8%)。脑梗死组与无脑梗死组抗凝比例差异无统计学意义,P=0.48;(3)AF脑卒中高危人群未抗凝原因有:医生未明确告知需要抗凝(48.5%);患者不知道抗凝的重要性(30.9%);医生明确告知需要抗凝,但患者担心出血(24.8%);虽医生告知需要抗凝,因华法林需要定期检测凝血,医疗条件不允许(21.3%);口服新型抗凝药价格昂贵,负担不起费用(7.9%);(4)年龄、脑梗死、高血压、糖尿病及冠心病作为AF脑卒中高危人群抗凝治疗的影响因素比较差异有统计学意义(P<0.05):结论(1)年龄、脑梗死、高血压、糖尿病及冠心病是AF脑卒中高危人群抗凝治疗的影响因素,年龄越大抗凝比例越低,已经发生脑梗死的患者在诊治过程中并未因心源性脑栓塞抗凝比例增加;(2)AF脑卒中高危人群未抗凝原因中医生未明确告知需要抗凝占比最大,所以需要临床一线医生提高规范诊疗意识,应抗凝则抗,降低AF心源性脑卒中的发生风险。

关键词：心房颤动脑卒中抗凝治疗

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