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Effects of operating conditions on iron(hydr)oxides evolution and ciprofloxacin degradation in potassium ferrate-ozone stepwise oxidation system

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Journal of Environmental Sciences 2024年第1期135卷 367-378页

作者： Xiaochen Li Yifan Wang Ning Wang Mei Li Maomao bai Jingtao Xu hongbo Wang School of Municipal and Environmental Engineering Shandong Jianzhu UniversityJinan 250101China Resources and Environment Innovation Institute Shandong Jianzhu UniversityJinan 250101China

In this study,a stepwise oxidation system of potassium ferrate(K_(2)FeO_(4))combined with ozone(O+3)was used to degrade ciprofloxacin(CIP).The effects of pH and pre-oxidation time of K_(2)FeO_(4) on the evolution of K_(2)FeO_(4) reduction products(iron(hydr)oxides)and CIP degradation were *** was found that in addition to its own oxidation capacity,K_(2)FeO_(4) can also influence the treatment effect of CIP by changing the catalyst *** presence of iron(hydr)oxides effectively enhanced the mineralization rate of CIP by catalyzing *** pH value can influence the content and types of the components with catalytic ozonation effect in iron(hydr)*** K_(2)FeO_(4) pre-oxidation stage can produce more iron(hydr)oxides with catalytic components for subsequent ozonation,but the evolution of iron(hydr)oxides components was influenced by O_(3) *** can also avoid the waste of oxidation capacity owing to the oxidation of iron(hydr)oxides by O_(3) and free *** intermediate degradation products were identified by Fourier transform ion cyclotron resonance mass spectrometry(FT-ICR-MS).Besides,the degradation pathways were *** the degradation products of CIP,the product with broken quinolone ring structure only appeared in the stepwise oxidation system.

关键词： Potassium ferrate reduction products Catalytic ozonation Ciprofloxacin Potassium ferrate pre-oxidation time

Some observables as an indication of atomic nuclear shape phase transition

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Chinese Science Bulletin 2007年第2期52卷 165-170页

作者： ZHANG JinFu bai hongbo Department of Physics Chifeng College Chifeng 024001 China

Using interacting boson model, shape phase transitions from U(5) to O(6) and from U(5) to SU(3) are studied in the space of two control parameters. Some simple shape phase diagrams in terms of the order parameter and one of the control parameters are presented. Spectra and E2 transition rates are used to construct observables. It is shown that these observables exhibit the behavior of the shape phase transition, namely a peak structure at and after the critical point.

关键词：原子核结构玻色子控制参数命令参数

Isospin and symmetry structure in ^(34)S

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Science China(Physics,Mechanics & Astronomy) 2013年第6期56卷 1111-1115页

作者： bai hongbo LI XiaoWei ZHANG JinFu College of Physics and Electronic Information Engineering Chifeng University College of Physics Jilin University

The interacting boson model-3(IBM-3) has been used to study the energy levels and electromagnetic transitions for the nucleus 34 *** main components of the wave function,isoscalar and isovector parts in the M1 and E2 transitions for low-lying states have been *** to this study,the theoretical calculations are in agreement with experimental data,and the nucleus 34 S is in transition from U(5) to S U(3).

关键词：同位旋对称性相互作用玻色子模型结构 SU(3) 电磁跃迁 E2跃迁数据一致

Bang-bang control suppression of amplitude damping in a three-level atom

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Science China(Physics,Mechanics & Astronomy) 2008年第1期51卷 29-37页

作者： CAO WanCang LIU XiaoShu bai hongbo LONG GuiLu Department of Physics Chifeng CollegeChifeng 024001China Key Laboratory for Atomic and Molecular Nanosciences and Department of Physics Tsinghua UniversityBeijing 100084China Tsinghua National Laboratory for Information Science and Technology Beijing 100084China

By using quantum bang-bang control technique,we studied the suppression of amplitude damping,or energy dissipation,in a three-level atom in various *** have explicitly given the bang-bang control groups in three diffe... 详细信息

关键词： dynamical control decoherence bang-bang control group amplitude damping

Mixed symmetry states and isospin excitation in N = Z nucleus ^(52)Fe

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Science China(Physics,Mechanics & Astronomy) 2008年第12期51卷 1845-1852页

作者： ZHANG JinFu↑, Lü LiJun, bai hongbo & LIANG MingZhi Department of Physics, Chifeng University, Chifeng 024001, China Department of Physics Chifeng University Chifeng China

The interacting boson model with isospin (IBM-3) was applied to study the band structure and electromagnetic transition properties of the low-lying states in the even-even N = Z nucleus 52Fe. The isospin excitation states with T = 0, 1 and 2 were identified, and compared with the available data. The study shows that the 2+3 state is the lowest mixed symmetry state in 52Fe. The excitation energy of the second 0+2 state with T = 0 in nucleus 52Fe was identified. The model calculations with the data show a reasonably good agreement.

关键词： energy level isospin mixed symmetry states electromagnetic transitions

240 nm AlGaN-based deep ultraviolet micro-LEDs:size effect versus edge effect

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Journal of Semiconductors 2024年第1期45卷 55-62页

作者： Shunpeng Lu Jiangxiao bai hongbo Li Ke Jiang Jianwei Ben Shanli Zhang Zi-Hui Zhang Xiaojuan Sun Dabing Li State Key Laboratory of Luminescence and Applications Changchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of SciencesChangchun 130033China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Key Laboratory of Electronic Materials and Devices of Tianjin School of Electronics and Information EngineeringHebei University of TechnologyTianjin 300401China

240 nm AlGaN-based micro-LEDs with different sizes are designed and ***,the external quantum efficiency(EQE)and light extraction efficiency(LEE)are systematically investigated by comparing size and edge ***,it is revealed that the peak optical output power increases by 81.83%with the size shrinking from 50.0 to 25.0μ***,the LEE increases by 26.21%and the LEE enhancement mainly comes from the sidewall light *** notably,transversemagnetic(TM)mode light intensifies faster as the size shrinks due to the tilted mesa side-wall and Al reflector ***,when it turns to 12.5μm sized micro-LEDs,the output power is lower than 25.0μm sized *** underlying mechanism is that even though protected by SiO2 passivation,the edge effect which leads to current leakage and Shockley-Read-Hall(SRH)recombination deteriorates rapidly with the size further ***,the ratio of the p-contact area to mesa area is much lower,which deteriorates the p-type current spreading at the mesa *** findings show a role of thumb for the design of high efficiency micro-LEDs with wavelength below 250 nm,which will pave the way for wide applications of deep ultraviolet(DUV)micro-LEDs.

关键词： AlGaN deep ultraviolet micro-LEDs light extraction efficiency size effect edge effect

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冲击加速度国际关键比对与参考值确定

计量学报 2024年第1期45卷 57-63页

作者：胡红波白杰孙桥中国计量科学研究院北京100029

介绍了中国计量科学研究院主导的冲击加速度国际关键比对(CCAUV.V-K4)。分析了比对样品冲击测量链各部分动态特性,并与实验室实际校准的冲击加速度激励信号相结合,说明了作为测量结果的冲击灵敏度与冲击激励的关系。针对比对参考值及其... 详细信息

介绍了中国计量科学研究院主导的冲击加速度国际关键比对(CCAUV.V-K4)。分析了比对样品冲击测量链各部分动态特性,并与实验室实际校准的冲击加速度激励信号相结合,说明了作为测量结果的冲击灵敏度与冲击激励的关系。针对比对参考值及其相应不确定度计算的问题,详细说明了3种方法的计算过程,包括国际比对推荐的计算方法和2种基于贝叶斯推断的计算方法。特别对基于贝叶斯统计的方法,结合实际校准过程的信息,采用了不同的统计模型和先验分布,利用马尔科夫链-蒙特卡洛(MCMC)数值计算方法得到了比对参考值的后验分布。对3种方法计算结果的进行了比较,并说明了3种方法的统一性及优缺点。

关键词：计量学冲击加速度关键比对CCAUV.V-K4 比对参考值贝叶斯推断

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深松整地作业深度检测系统的设计

南方农机 2022年第21期53卷 46-48页

作者：白洪波胡军黑龙江八一农垦大学工程学院黑龙江大庆163319 延军农场有限公司延兴管理区黑龙江鹤岗156109

针对传统深松作业质量检测方法耗时长、精度低的问题,本研究基于传感器技术设计了一种高精度、低成本的深松整地作业深度检测系统,该检测系统可依据深松机具悬挂系统的结构,结合倾角传感器、超声波传感器和深松机具运动过程中产生的几... 详细信息

针对传统深松作业质量检测方法耗时长、精度低的问题,本研究基于传感器技术设计了一种高精度、低成本的深松整地作业深度检测系统,该检测系统可依据深松机具悬挂系统的结构,结合倾角传感器、超声波传感器和深松机具运动过程中产生的几何位移变化规律测量耕深距离。研究结果表明:深松机悬挂结构在作业过程中的角度及高度变化规律符合实际作业情况,基于姿态解算与卡尔曼滤波推导出的耕深测量计算公式可用于深松作业中的耕深距离测量。

关键词：深松整地传感器耕深检测姿态解算

四旋翼飞行器的RBF神经网络鲁棒自适应控制

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北京航空航天大学学报 2024年第5期50卷 1620-1628页

作者：马振伟白浩陈洪波王劲博中山大学系统科学与工程学院广州510006

针对具有模型不确定性和有界外部扰动的四旋翼飞行器,提出了一种基于径向基函数神经网络的鲁棒自适应全局控制方法(RRAC)。所提方法结合了神经网络控制对未知非线性的强拟合能力和鲁棒控制的全局稳定性,解决了神经网络控制仅能实现半全... 详细信息

针对具有模型不确定性和有界外部扰动的四旋翼飞行器,提出了一种基于径向基函数神经网络的鲁棒自适应全局控制方法(RRAC)。所提方法结合了神经网络控制对未知非线性的强拟合能力和鲁棒控制的全局稳定性,解决了神经网络控制仅能实现半全局一致最终有界的问题,实现了控制精度和鲁棒性的双重提升。所设计的控制器由在近似域内工作的神经网络控制器和在近似域外工作的鲁棒控制器组成。引入一种新型切换函数来实现两者之间的平滑切换,以保证闭环系统的所有信号是全局一致最终有界的。利用Lyapunov函数和Barbalat引理严格证明了非线性四旋翼飞行器系统的稳定性。仿真表明,所设计的控制器在模型不确定性和有界外部扰动下对参考轨迹依旧保持良好的跟踪性能,且跟踪误差趋近于零。

关键词：四旋翼飞行器 RBF神经网络鲁棒自适应控制平滑切换函数全局一致最终有界