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基于DMD的阿达玛变换型近红外光谱仪快速处理系统设计与实现

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光谱学与光谱分析 2025年第1期45卷 133-138页

作者：王硕谢振坤魏志鹏长春理工大学高功率半导体激光国家重点实验室吉林长春130022 长春理工大学中山研究院广东中山528437

数字微镜器件(DMD)的近红外光谱仪,具有波长重复性好、分辨率高和抗振动性好等优点,广泛应用于食品安全和农业生产等领域的研究。随着DMD的微小型近红外光谱仪发展逐渐趋于成熟,仪器的成本和性能仍然是研发的关键。尽管大部分将重点放... 详细信息

数字微镜器件(DMD)的近红外光谱仪,具有波长重复性好、分辨率高和抗振动性好等优点,广泛应用于食品安全和农业生产等领域的研究。随着DMD的微小型近红外光谱仪发展逐渐趋于成熟,仪器的成本和性能仍然是研发的关键。尽管大部分将重点放在了软件开发和检测方法的研究,而仪器硬件的处理速度至关重要。只有确保光谱仪能够快速准确的采集并传输数据,才能有效实现光谱分析。在多数研究中,阿达玛矩阵的生成和解码工作通常由上位机完成,并通过FLASH存储的方式导入模板。这种方式可能会限制采集一幅完整光谱数据的时间效率。为了提高光谱采集速度和信噪比,提出一种高速驱动DMD和快速数据采集的方法,并基于DMD微小型近红外光谱仪设计一套硬件电路系统。采用现场可编辑门阵列(FPGA)和ARM的架构,创新性地实现了奇偶阿达玛模板的生成与解码过程在嵌入式系统底层执行,加快了光谱分析的速度并提高信噪比。通过与市面上DMD型光谱仪对比,研究结果显示,所研发的光谱仪完成单次光谱的采集时间仅需214 ms,相比商用DMD型光谱仪,采集效率提升了4倍。在同等3 s的采集时间内,所研发光谱仪的信噪比为4600,相比商用DMD型光谱仪,信噪比提升了1.5倍。通过所研发的光谱仪对油菜籽样品进行光谱扫描,分析了油菜籽的脂肪、蛋白质和水分的含量,并采用偏最小二乘回归(PLSR)建立了相应的模型。油菜籽脂肪含量的校正相关系数为0.9865、预测相关系数为0.9672;蛋白质含量的校正相关系数为0.9854、预测相关系数系数为0.9636;水分含量的校正相关系数为0.9875、预测相关系数为0.9614。模型评估的结果表明,该光谱仪能够满足油菜籽成分检测的需求,验证该光谱仪在商业领域具有重要的应用价值。

关键词：数字微镜器件近红外光谱仪阿达玛信噪比嵌入式油菜籽

Evaluation and optimization of a hybrid wave energy converter using excited motion response in two degrees of freedom

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Journal of Hydrodynamics 2023年第1期35卷 145-154页

作者： Bin-zhen Zhou Yu Wang Jian-jian Hu peng Jin lei Wang School of Civil Engineering and Transportation South China University of TechnologyGuangzhou510641China School of Marine Science and Engineering South China University of TechnologyGuangzhou511442China

As waves in China seas are not high,a wave energy converter consisting of a coaxial annular buoy and a cylindrical buoy that extracts wave energy using two generators through the relative heave motion between the buoys and the pitch motion of the cylinder could be a more efficient choice.A dynamic model considering constraints and assuming linear power take-off is established to evaluate the power performance of the *** influences of two key factors,the diameter of the annular buoy and the power take-off stiffness of the pitching generator,and their couplings on the power performance are *** power of the pitching generator accounts for a major proportion of the total *** increase in the annular buoy diameter increases the power of the heaving generator while greatly decreases the power of the pitching *** increase in the power take-off stiffness of the pitching generator greatly decreases its power while has little influence on the power of the heaving *** two factors also influence the peak period of the total *** on the findings and practical limitations,an optimization strategy is ***,the device is optimized based on a real wave environment in Shandong Province,China.

关键词： Wave energy converter(WEC) two degrees of freedom(DOF) parametric study power optimization real wave environment

Real-Time Control Strategy of Exoskeleton Locomotion Trajectory Based on Multi-modal Fusion

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Journal of Bionic Engineering 2023年第6期20卷 2670-2682页

作者： Tao zhen lei Yan College of Engineering Beijing Forestry UniversityNo.35East Qinghua RoadBeijing100083China

The exoskeleton robot is a typical man–machine integration system in the human *** ideal man–machine state is to achieve motion coordination,stable output,strong personalization,and reduce man–machine confrontation during *** order to achieve an ideal man–machine state,a Time-varying Adaptive Gait Trajectory Generator(TAGT)is designed to estimate the motion intention of the wearer and generate a personalized gait *** can enhance the hybrid intelligent decision-making ability under human–machine collaboration,promote good motion coordination between the exoskeleton and the wearer,and reduce metabolic *** important feature of this controller is that it utilizes a multi-layer control strategy to provide locomotion assistance to the wearer,while allowing the user to control the gait trajectory based on human–robot Interaction(HRI)force and locomotion *** this article,a Temporal Convolutional Gait Prediction(TCGP)model is designed to learn the personalized gait trajectory of the wearer,and the control performance of the model is further improved by fusing the predefined gait trajectory method with an adaptive interactive force control model.A human-in-the-loop control strategy is formed with the feedback information to stabilize the motion trajectory of the output joints and update the system state in real time based on the feedback from the inertial and interactive force *** experimental study employs able-bodied subjects wearing the exoskeleton for motion trajectory control to evaluate the performance of the proposed TAGT model in online *** from these evaluations demonstrate that the controller TAGT has good motor coordination and can satisfy the subject to control the motor within a certain range according to the walking habit,guaranteeing the stability of the closed-loop system.

关键词： Exoskeleton Multi-layer control strategy Human–machine collaboration Time-varying adaptive gait Hybrid intelligent

Microstructure and mechanical properties of friction pull plug welding for2219-T87 aluminum alloy with tungsten inert gas weld

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International Journal of Minerals,Metallurgy and Materials 2022年第6期29卷 1216-1224页

作者： zhen Shao lei Cui Lijun Yang peng Lu Huimiao Wang Zhuanping Sun Jianling Song Tianjin Key Laboratory of Advanced Joining Technology School of Materials Science and EngineeringTianjin UniversityTianjin 300350China Tianjin Space Launch Vehicle Manufacturing Co.Ltd Tianjin 300457China

The friction pull plug welding(FPPW)of the 2219-T87 tungsten inert gas(TIG)welded joint was investigated,and the microstructures,precipitate evolution,mechanical properties,and fracture morphologies of this joint were analyzed and *** this study,defectfree joints were obtained using a rotational speed of 7000 r/min,an axial feeding displacement of 12 mm,and an axial force of 20-22 *** results indicated that within these welding parameters,metallurgical bonding between the plug and plate is achieved by the formation of recrystallized *** microstructural features of the FPPW joint can be divided into different regions,including the heat-affected zone(HAZ),thermomechanically affected zone(TMAZ),recrystallization zone(RZ),heat-affected zone in the TIG weld(TIG-HAZ),and the thermomechanically affected zone in the TIG weld(TIG-TMAZ).In the TIG-TMAZ,the grains were highly deformed and elongated due to the shear and the extrusion that produces the plug during the FPPW *** main reason for the softening in the TMAZ is determined to be the dissolution ofθ’and coarsening ofθprecipitate *** a tensile test,the FPPW joint welded with an axial force of 22 kN showed the highest ultimate tensile strength of 237 *** locations of cracks and factures in the TIG-TMAZ were *** fracture morphology of the tensile sample showed good plasticity and toughness of the joints.

关键词： friction pull plug welding tungsten inert gas weld microstructures constituent particles mechanical properties

Gravitational wave echoes from strange quark stars in the equation of state with density-dependent quark masses

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Nuclear Science and Techniques 2023年第11期34卷 112-119页

作者： Jian‑Feng Xu lei Cui zhen‑Yan Lu Cheng‑Jun Xia Guang‑Xiong peng School of arts and sciences Suqian UniversitySuqian 223800China Hunan Provincial Key Laboratory of Intelligent Sensors and Advanced Sensor Materials School of Physics and ElectronicsHunan University of Science and TechnologyXiangtan 411201China Center for Gravitation and Cosmology College of Physical Science and TechnologyYangzhou UniversityYangzhou 225009China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China

According to the recent studies,the gravitational wave(GW)echoes are expected to be generated by quark stars composed of ultrastiff quark *** ultrastiff equations of state(EOS)for quark matter were usually obtained either by a simple bag model with artificially assigned sound velocity or by employing interacting strange quark matter(SQM)depicted by simple reparameterization and *** this study,we investigate GW echoes with EOSs for SQM in the framework of the equivparticle model with density-dependent quark masses and pairing *** conclude that strange quark stars(SQSs)can be sufficiently compact to possess a photon sphere capable of generating GW echoes with frequencies in the range of approximately 20 ***,SQSs cannot account for the observed 72 Hz signal in GW170817 ***,we determined that quark-pairing effects play a crucial role in enabling SQSs to satisfy the necessary conditions for producing these types of echoes.

关键词： Strange quark star Gravitational wave echoes Color-flavour-locked phase Strange quark matter

Wave Extraction and Attenuation Performance of A Hybrid System of An Edinburgh Duck WEC and A Floating Breakwater

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China Ocean Engineering 2022年第2期36卷 167-178页

作者： ZHOU Bin-zhen WANG Yu ZHANG Heng-ming JIN peng WANG lei ZHOU Zhao-min School of Civil Engineering and Transportation South China University of TechnologyGuangzhou 510641China College of Shipbuilding Engineering Harbin Engineering UniversityHarbin 150001China Southern Marine Science and Engineering Guangdong Laboratory(Zhanjiang) Zhanjiang 524013China

Installing the Edinburgh Duck Wave Energy Converter(ED WEC)on a floating breakwater provides a potential solution to reduce costs and improve the reliability of the ED *** investigate the interactions between the ED WEC and the breakwater,a two-dimensional numerical model of a hybrid WEC-breakwater system is established based on Star-CCM+Computational Fluid Dynamics(CFD)*** wave energy extraction performance,wave attenuation performance,and wave forces on the breakwater of the hybrid system are compared with those of the corresponding single *** effects of the initial attack angle,the distance between the WEC and the breakwater,and the incident wave height on the pitch motion,energy conversion efficiency,transmission coefficient,and wave forces on the breakwater of the hybrid system are *** results indicate that combing the ED WEC with a breakwater can improve the energy extraction performance of the ED WEC and reduce the wave forces on the breakwater in shorter-period *** conversion efficiency of the hybrid system with the initial attack angle of 42°is the largest in shorter-period waves,but is reduced with the increase of initial attack angle in longer-period *** wave attenuation performance of the hybrid system is determined by the draft of the *** distance between the WEC and the breakwater has little effect on the hybrid *** energy extraction of the ED WEC of the hybrid system decreases significantly with the increase of the incident wave height.

关键词： Edinburgh Duck wave energy converter floating breakwater wave energy extraction wave attenuation wave nonlinearity

Dynamic and Power Generation Features of A Wind-Wave Hybrid System Consisting of A Spar-Type Wind Turbine and An Annular Wave Energy Converter in Irregular Waves

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China Ocean Engineering 2023年第6期37卷 923-933页

作者： ZHOU Bin-zhen zhenG Zhi HONG Miao-wen JIN peng WANG lei CHEN Fan-ting School of Civil Engineering and Transportation South China University of TechnologyGuangzhou 510641China School of Marine Science and Engineering South China University of TechnologyGuangzhou 511442China State Key Laboratory of Coastal and Offshore Engineering Dalian University of TechnologyDalian 116024China

Combining wave energy converters(WECs)with floating offshore wind turbines proves a potential strategy to achieve better use of marine renewable *** full coupling investigation on the dynamic and power generation features of the hybrid systems under operational sea states is necessary but limited by numerical simulation *** an aero-hydro-servo-elastic coupling numerical tool is developed and applied to investigate the motion,mooring tension,and energy conversion performance of a hybrid system consisting of a spar-type floating wind turbine and an annular wave energy *** show that the addition of the WEC has no significant negative effect on the dynamic performance of the platform and even enhances the rotational stability of the *** surge and pitch motion,the peak of the spectra is originated from the dominating wave component,whereas for the heave motion,the peak of the spectrum is the superposed effect of the dominating wave component and the resonance of the *** addition of the annular WEC can slightly improve the wind power by making the rotor to be in a better position to face the incoming wind and provide considerable wave energy production,which can compensate for the downtime of the offshore wind.

关键词： wind energy wave energy hybrid system motion power generation

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带扇叶形锚固板钢筋机械锚固性能试验研究

Predominance of linear Q and μ systematics in randominteraction ensembles

工程力学 2025年第1期42卷 74-82页

作者：吴琛姚鹏飞陈真锋邓芬福建理工大学福建省土木工程新技术与信息化重点实验室福州350118 锦曦控股集团有限公司福州350017

为避免型钢混凝土节点钢筋锚固时导致的大量型钢穿孔或钢筋焊接，设计一种新型扇叶形锚固板，并通过带扇叶形锚固板钢筋中心拔出试验，分析锚固板形式、钢筋直径、锚固长度对带锚固板钢筋机械锚固性能的影响。试验结果表明：带扇叶型锚... 详细信息

为避免型钢混凝土节点钢筋锚固时导致的大量型钢穿孔或钢筋焊接，设计一种新型扇叶形锚固板，并通过带扇叶形锚固板钢筋中心拔出试验，分析锚固板形式、钢筋直径、锚固长度对带锚固板钢筋机械锚固性能的影响。试验结果表明：带扇叶型锚固板钢筋可避开抗剪栓钉，具有施工方便的优点，同时拥有良好的锚固性能;当钢筋锚固长度为5d~7d时，发生混凝土劈裂破坏，当锚固长度为8d~12d时，发生钢筋拉断破坏，且钢筋的锚固系数大于1.25，具有良好的锚固性能;带扇叶形锚固板钢筋极限粘结强度随钢筋直径、钢筋锚固长度增大而减小，建议钢筋的锚固长度取为8d;提出了适用于带扇叶形锚固板钢筋极限粘结强度的计算公式，能较准确地反映扇叶形锚固板对混凝土产生的挤压和劈裂作用。

关键词：扇叶型锚固板中心拔出试验机械锚固性能极限粘结强度型钢混凝土节点

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Nuclear Science and Techniques 2018年第11期29卷 247-253页

作者： zhen-zhen Qin Yang lei School of Science Southwest University of Science and TechnologyMianyang 621010China School of National Defense Science and Technology Southwest University of Science and TechnologyMianyang 621010China

In random-interaction ensembles, the electric quadrupole moments(Q) and magnetic moments(μ) of the Iπ = 11/2-isomers of the Cd isotopes predominantly exhibit a linear correlation with the neutron numbers,corresponding to the recently emphasized linear Q and μsystematics in realistic nuclear systems. Although the seniority scheme enhances such predominance(more essentially for μ), the configuration mixing due to quadrupole-like and δ-force-like proton-neutron(pn) interactions is responsible for the linear Q and μ systematics,respectively, in realistic nuclear system, as well as randominteraction ensembles.

关键词： Random interaction Electromagnetic moment Linear systematics Proton–neutron interaction