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Acta Metallurgica Sinica(English Letters) 2024年第6期37卷 1007-1018页

作者： Huanzhi Zhang Tianxin Li Qianqian Wang zhenbo zhu Hefei Huang Yiping Lu Engineering Research Center of High Entropy Alloy Materials(Liaoning Province) School of Materials Science and EngineeringDalian University of TechnologyDalian116024China Shanghai Institute of Applied Physics Chinese Academy of Sciences(CAS)Shanghai201800China

Interstitial strengthening with nitrogen(N)is one of the effective ways to improve the mechanical properties of HEAs,but the effects of N on the microstructures and mechanical properties of the irradiated HEAs have not been studied ***,the microstructures and mechanical properties of N-free and N-doped Ti_(2)ZrNbV_(0.5)Mo_(0.2)HEAs before and after He irradiation were *** results showed that the solid solution strengthening caused by interstitial N improved the yield strength at room temperature and 1023 K without significantly reducing plasticity.N doping significantly promoted the growth,aggregation and wider spatial distribution of He bubbles by enhancing the mobility of He atoms/He-vacancy complexes,with the average size of He bubbles increasing from 10.4 nm in N-free HEA to 31.0 nm in N-doped *** addition,N-doped HEA showed a much higher irradiation hardness increment and hardening fraction than N-free *** to conventional materials doped with N,the introduction of N into Ti_(2)ZrNbV_(0.5)Mo_(0.2)HEA had adverse effects on its resistance to He bubble growth and irradiation *** results of this study indicated that N doping may not improve the irradiation resistance of HEAs.

关键词： High-entropy alloys Nitrogen doping Mechanical properties Helium bubbles Irradiation resistance

In-situ TEM investigation on the evolution of He bubbles and dislocation loops in Ni-based alloy irradiated by H_(2)^(+)&He^(+)dual-beam ions

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Journal of Materials Science & Technology 2023年第7期138卷 36-49页

作者： zhenbo zhu Weichi Ji Hefei Huang Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China

The synergistic evolution mechanisms of He bubbles and dislocation loops under 30 keV H_(2)^(+)&He^(+)dual-beam ions irradiation at 650℃ in the Ni-based alloy GH3535,which is the most promising candidate structure material for molten salt reactors(MSRs),were revealed via in-situ *** nucleation,merg-ing,and change in the size of the dislocation loops and He bubbles were characterized in detail to study the influences of irradiation fluence and pre-existing dislocation loops on their *** number density of both the He bubbles and dislocation loops increases rapidly and subsequently saturates,whereas their size continuously increases with the increasing ion ***-existing dislocation loops with strong absorption characteristics grow preferentially and suppress the nucleation of dislocation loops during the dual-beam ions ***,the bubbles tend to nucleate within the dislocation loops to form bubble-loop complexes,and then decrease in their number *** details of the un-faulting processes of the Frank loops were discussed,where the energy difference between the two types of loops as well as the evolution of the inside Shockley dislocation loops dominates the unfaulting *** several evolution stages of the loop-punching mechanism are revealed,and the emitted loops can directly form perfect loops as well as unfault the neighboring Frank *** He bubbles inside the loops provide corresponding stress for the formation of rhombic loops,which can achieve rapid growth and sweep ability by merging with the neighboring ***,its dissociation to Shockley dis-location can unfault the Frank loops along their slip *** the four Frank loop variations,the edge-on Frank loop variations have the highest growth rate,followed by the perfect *** related mechanisms based on in-situ experimental observation are discussed in depth.

关键词： In-situ TEM observation Ni-based alloy Dislocation loop Punching loop Bubble-loop complex

Method of target tracking with Doppler blind zone constraint

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Journal of Systems Engineering and Electronics 2013年第6期24卷 889-898页

作者： Wei Han Ziyue Tang zhenbo zhu Department of Air/Space based Early-warning Equipment Air Force Early Warning Academy

Doppler blind zone （DBZ） has a bad influence on the airborne early warning radar, although it has good detection performance for low altitude targets with pulse Doppler （PD） technology. In target tracking, the blind zone can cause target tracking breakage easily. In order to solve this problem, a parallel particle filter （PF） algorithm based on multi-hypothesis motion models （MHMMs） is proposed. The algorithm produces multiple possible target motion models according to the DBZ constraint. Particles are updated with the constraint in each motion model. Once the first measurement from the target which reappears from DBZ falls into the particle cloud formed by any model, the measurementtrack association succeeds and track breakage is avoided. The simulation results show that on the condition of different DBZ ranges, a high association ratio can be got for targets with different maneuverability levels, which accordingly improves the tracking quality.

关键词： Doppler blind zone (DBZ) track breakage particle filter (PF) multi-hypothesis motion model (MHMM) measurementtrack association

Effect of beam-pointing errors on bistatic SAR imaging

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Journal of Systems Engineering and Electronics 2008年第1期19卷 88-93页

作者： Zhang Yabiao Yuan Bingcheng Tang Ziyue zhu zhenbo Naval Univ. of Engineering Wuhan 430033 P. R. China Air Force Radar Academy Wuhan 430019 P. R. China

The purpose is to conduct a research in the energy variation of echo wave and the imaging effect caused by the aero bistatic SAR pointing errors. Based on the moving geometry configuration of aero bistatic SAR, a model of beam pointing errors is built. Based on this, the azimuth Doppler frequency center estimation caused by these errors and the limitation to the beam pointing synchronization error are studied, and then the imaging result of different errors are analyzed. The computer＇s simulations are provided to prove the validity of the above analysis.

关键词： bistatic SAR directional diagram of antenna beam pointing error

Effect of Post-irradiation Annealing on Microstructure Evolution and Hardening in GH3535 Alloy Irradiated by Au Ions

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Acta Metallurgica Sinica(English Letters) 2022年第11期35卷 1903-1911页

作者： Cunyun Hu Hefei Huang zhenbo zhu Awen Liu Yan Li School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China Shanghai Instituteof AppliedPhysics ChineseAcademy of SciencesShanghai 201800China School of Nuclear Scienceand Technology University of Chinese Academy of SciencesBeijing 100049China

The Au ion-irradiation experiments of GH3535 alloy,a candidate alloy structural material for molten salt reactor,was carried out in this ***,isochronous annealing experiments were conducted from 200 to 850 ℃ to clarify the evolution behavior of damage defects with increasing *** coarsening of dislocation loops and formation and dissolution of precipitates with increasing annealing temperature were characterized by transmission electron *** was performed to measure the variation of hardness caused by ***,the relationship between irradiation hardening and microstructure evolution was *** study lays a foundation for the evaluation of irradiation damage properties of GH3535 alloy at different annealing temperatures.

关键词： Nickel-based alloy Irradiation Annealing Dislocation loop Precipitate

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对一道计算微波传输功率易错题的反思

电气电子教学学报 2024年第1期46卷 156-158页

作者：贺昌辉朱振波张迪黎静空军预警学院武汉430019

微波传输线的传输功率是微波技术中一个重要的问题,为加强学员对传输功率的认识,以一道易错题为例,剖析了学员错解的原因,指出了入射波电压振幅的正确求解方法,拓展了特殊长度传输线上入射波电压振幅与终端负载的关系,并用所得关系式对... 详细信息

微波传输线的传输功率是微波技术中一个重要的问题,为加强学员对传输功率的认识,以一道易错题为例,剖析了学员错解的原因,指出了入射波电压振幅的正确求解方法,拓展了特殊长度传输线上入射波电压振幅与终端负载的关系,并用所得关系式对该道易错题重新求解,结果表明两个关系式即简单明了,又准确直观,是一种准确计算微波传输功率的有效方法。

关键词：传输功率入射波电压振幅终端负载

Helium bubble formation and evolution in NiMo-Y_(2)O_(3)alloy under He ion irradiation

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Chinese Physics B 2022年第4期31卷 500-505页

作者： Awen Liu Hefei Huang Jizhao Liu zhenbo zhu Yan Li School of Physical Science and Technology Shanghai Tech UniversityShanghai 201210China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China

We report helium ion irradiation experiments for a new type of dispersion-strengthened NiMo-Y_(2)O_(3)alloy with three different irradiation doses and varying irradiation dose rates at 750℃to evaluate its helium-induced damage *** electron microscopy was used to reveal the evolution of helium bubbles after *** experimental results show that with increasing ion dose,the number density of helium bubbles increases ***,the mean size of helium bubbles first increases and then decreases,mainly due to the varied ion dose *** volume fractions of helium bubbles in the three investigated samples after irradiation are 0.15%,0.32%,and 0.27%,which are lower than that of the Hastelloy N alloy(0.58%)after similar irradiation *** indicates that the NiMo-Y_(2)O_(3)alloy exhibits better helium-induced-swelling resistance than the Hastelloy N alloy,highlighting its potential applicability to MSRs,from the perspective of irradiation performance.

关键词： NiMo-Y_(2)O_(3)alloy dose rate helium bubble evolution volume fraction

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环网柜绝缘塞测温技术研究与应用探索

农村电气化 2024年第9期 79-83页

作者：赵国栋祝振波艾文豪姚应龙袁宗凡陆叶飞杭州休普电子技术有限公司浙江杭州311199 国网新疆电力有限公司吐鲁番供电公司新疆吐鲁番838000 常州市长江热能有限公司江苏常州213000

随着电力系统的不断发展,中压设备尤其是环网柜、电缆分支箱和充气式开关柜的使用越来越普遍。这些设备的可靠性对电网的稳定运行至关重要。电缆故障,尤其是由绝缘和接触不良引起的发热问题,已成为供电部门面临的主要挑战。传统的故障... 详细信息

随着电力系统的不断发展,中压设备尤其是环网柜、电缆分支箱和充气式开关柜的使用越来越普遍。这些设备的可靠性对电网的稳定运行至关重要。电缆故障,尤其是由绝缘和接触不良引起的发热问题,已成为供电部门面临的主要挑战。传统的故障检测方法由于受到绝缘材料隔热性的影响,难以准确掌握故障点。文章介绍了一种新型的绝缘塞测温传感器,该传感器采用电场能取电技术,具有无线数据传输、高精度感知、抗干扰能力强等特点,可有效监测中压设备电气节点的温度变化,为电网故障的早期预警提供了新的技术手段。

关键词：环网柜绝缘塞无线测温电场能取电故障预警

基于分数阶傅里叶变换的加速微弱目标检测与估计

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电波科学学报 2013年第2期28卷 296-304页

作者：战立晓汤子跃朱振波空军预警学院研究生管理大队湖北武汉430019 空军预警学院空天基预警装备系湖北武汉430019

加速微弱目标使雷达回波多普勒谱严重扩展,传统动目标检测方法失效.为了实现监视雷达对加速微弱目标的有效检测和参数估计,提出了一种新的雷达信号处理方法.利用分数阶傅里叶变换完成监视雷达接收回波慢时间域线性调频信号的能量集聚,... 详细信息

加速微弱目标使雷达回波多普勒谱严重扩展,传统动目标检测方法失效.为了实现监视雷达对加速微弱目标的有效检测和参数估计,提出了一种新的雷达信号处理方法.利用分数阶傅里叶变换完成监视雷达接收回波慢时间域线性调频信号的能量集聚,提高低信噪比条件下的加速目标检测性能,并通过离散尺度化法对加速目标参数进行估计.理论推导和仿真分析了相参处理间隔长度、分数阶次步长和信噪比等因素对所提方法的统计检测性能和参数估计精度的影响.

关键词：监视雷达加速微弱目标分数阶傅里叶变换目标检测参数估计

基于Keystone变换和MDCFT的高机动弱目标检测与参数估计

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航空学报 2013年第4期34卷 855-863页

作者：战立晓汤子跃朱振波空军预警学院空天预警装备系湖北武汉430019

常规雷达对隐身、超声速和高机动目标存在回波信噪比不足、距离徙动和多普勒谱扩展问题。将Keystone变换和修正离散Chirp-Fourier变换(MDCFT)相结合,提出了一种新的雷达信号处理算法。该算法通过Keystone变换补偿距离徙动问题,利用MDCF... 详细信息

常规雷达对隐身、超声速和高机动目标存在回波信噪比不足、距离徙动和多普勒谱扩展问题。将Keystone变换和修正离散Chirp-Fourier变换(MDCFT)相结合,提出了一种新的雷达信号处理算法。该算法通过Keystone变换补偿距离徙动问题,利用MDCFT对多普勒谱严重扩展的目标回波进行相参积累,提高目标检测性能的同时完成了对目标参数的估计,且该算法在方位向欠采样时仍可适用。最后对算法运算量及性能进行了分析,通过仿真验证了该算法的有效性。

关键词：长时间相参积累目标检测参数估计 Keystone变换修正离散Chirp-Fourier变换