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Study on Thermomagnetic Treatment Fe-25.5Cr-12Co Permanent Magnetic Alloy

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材料热处理学报 2004年第5期25卷 561-563页

作者： GAORun-sheng ZHENLiang shaowen-zhu SUNXue-yin zhuDan-yang XURen-gen DepartmentofMaterialsScience HarbinInstituteofTechnologyHarbinChina TechnologyandDevelopmentCentre HangzhouPermanentMagnetGroupCo.Ltd.HangzhouChina

The magnetic properties and microstructure in a low cobalt Fe-25.5Cr-12Co alloy by different process of thermomagnetic treatment were investigated. It is found that magnetic properties are sensitive to parameters of thermo- magnetic treatment process in magnetic field, including temperature, time and applied magnetic field. There are optimized isothermal aging temperature and time in different magnetic heat treatment conditions. High magnetic field strength could improve magnetic properties. Applied magnetic field has a great effect on microstructure of the Fe-25.5Cr-12Co alloy. The finer ferromagnetic d] particles with suitable c/a ratio by high magnetic field magnetic heat treatment are attributed to improvement the magnetic properties.

关键词： Fe-25.5Cr-12Co合金热磁处理磁性显微结构永久磁铁

Exploring HONO formation and its role in driving secondary pollutants formation during winter in the North China Plain

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环境科学学报:英文版 2023年第10期132卷 83-97页

作者： Shaobin Zhang Guo Li Nan Ma Yao He shaowen zhu Xihao Pan Wenlin Dong Yanyan Zhang Qingwei Luo Jeannine Ditas Uwe Kuhn Yuxuan Zhang Bin Yuan Zelong Wang Peng Cheng Juan Hong Jiangchuan Tao Wanyun Xu Ye Kuang Qiaoqiao Wang Yele Sun Guangsheng Zhou Yafang Cheng Hang Su Institute for Environmental and Climate Research Jinan UniversityGuangzhou 511443China Guangdong-Hongkong-Macao Joint Laboratory of Collaborative Innovation for Environmental Quality Guangzhou 511443China Max Planck Institute for Chemistry Mainz 55128Germany School of Atmospheric Sciences Nanjing UniversityNanjing 210023China Institute of Mass Spectrometry and Atmospheric Environment Jinan UniversityGuangzhou 510632China State Key Laboratory of Severe Weather&Key Laboratory for Atmospheric Chemistry Institute of Atmospheric CompositionChinese Academy of Meteorological SciencesBeijing 100081China State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Gucheng Experimental Station of Ecological and Agricultural Meteorology Chinese Academy of Meteorological SciencesBeijing 100081China

Daytime HONO photolysis is an important source of atmospheric hydroxyl radicals(OH).Knowledge of HONO formation chemistry under typical haze conditions,however,is still limited.In the Multiphase chemistry experiment in Fogs and Aerosols in the North China Plain in 2018,we investigated the wintertime HONO formation and its atmospheric implications at a rural site Gucheng.Three different episodes based on atmospheric aerosol loading levels were classified:clean periods(CPs),moderately polluted periods(MPPs)and severely polluted periods(SPPs).Correlation analysis revealed that HONO formation via heteroge.neous conversion of NO_(2)was more efficient on aerosol surfaces than on ground,highlighting the important role of aerosols in promoting HONO formation.Daytime HONO budget analysis indicated a large missing source(with an average production rate of 0.66±0.26,0.97±0.47 and 1.45±0.55 ppbV/hr for CPs,MPPs and SPPs,respectively),which strongly correlated with photo-enhanced reactions(NO_(2)heterogeneous reaction and particulate nitrate photolysis).Average OH formation derived from HONO photolysis reached up to(0.92±0.71),(1.75±1.26)and(1.82±1.47)ppbV/hr in CPs,MPPs and SPPs respectively,much higher than that from O3 photolysis(i.e.,(0.004±0.004),(0.006±0.007)and(0.0035±0.0034)ppbV/hr).Such high OH production rates could markedly regulate the atmospheric oxidation capacity and hence promote the formation of secondary aerosols and pollutants.

关键词： HONO North China Plain Budget analysis OH radicals

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OOK与BPSK兼容激光通信性能分析

激光与光电子学进展 2024年第7期61卷 191-201页

作者：朱福南李佳蔚鲁绍文陈卫标中国科学院上海光学精密机械研究所空间激光信息传输与探测技术重点实验室上海201800 中国科学院大学材料与光电研究中心北京100049 中国科学院上海光学精密机械研究所航天工程部上海201800

为适应空间激光通信组网技术,多体制复用的通信方式应运而生。发送端采用强度调制器兼容实现了开/关键控(OOK)和二进制相移键控(BPSK)调制,接收端通过内差探测方式兼容实现了这两种调制信号的解调。在实际工程应用中,激光通信系统中散... 详细信息

为适应空间激光通信组网技术,多体制复用的通信方式应运而生。发送端采用强度调制器兼容实现了开/关键控(OOK)和二进制相移键控(BPSK)调制,接收端通过内差探测方式兼容实现了这两种调制信号的解调。在实际工程应用中,激光通信系统中散粒噪声、电子器件热噪声不可避免地会影响通信性能,在此基础上,进一步分析了强度调制器偏压点误差量与光学滤波器带宽大小对于非相干OOK和相干BPSK通信信噪比的影响。仿真结果表明:光学滤波器带宽对非相干OOK通信性能影响较大,接收光功率−46 dBm时,1 nm滤波带宽的非相干OOK信噪比开销约1.26;接收光功率−50 dBm以下时,20 nm滤波带宽的相干BPSK信噪比开销小于0.02。非相干OOK无编码通信灵敏度在1.25 Gbit/s速率时需满足−46 dBm@10^(−6),光滤波带宽应不大于0.8 nm,强度调制器偏压误差应控制在半波电压的1%以内。在消共模噪声和优化光滤波带宽条件下,1.25 Gbit/s速率的BPSK无编码通信灵敏度满足−55 dBm@10−6。

关键词：激光通信多体制复用强度调制器内差解调光滤波带宽

烟草BTB/POZ蛋白家族的鉴定及其在抗马铃薯Y病毒中的作用

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浙江大学学报（农业与生命科学版） 2024年第2期50卷 295-307页

作者：张劭文赵天伦肖钦之祝水金陈进红浙江大学农业与生物技术学院浙江杭州310058 浙江大学海南研究院海南三亚572025 浙江省作物种质资源重点实验室浙江杭州310058 湖南省烟草公司永州市公司湖南永州425000

马铃薯Y病毒(potato virus Y,PVY)侵染烟草(Nicotiana tabacum)会引起烟草脉带病,造成烟叶品质下降。broad complex,tramtrack,and bric-à-brac/pox virus and zinc finger(BTB/POZ)是动植物体内广泛存在的蛋白质家族,在植物生长和发育的各个环节都起着非常重要的作用。本研究鉴定到90个烟草BTB/POZ家族蛋白,对应71个基因。在这些蛋白质的序列中,识别到9种保守基序(motif),并根据其出现顺序将BTB/POZ家族成员划分至6个亚家族。结构域分析表明,BTB/POZ同一亚家族成员的结构域具有一致性。对BTB/POZ蛋白的三维构象进行预测发现,所有亚家族成员结构都以α螺旋为主,同一亚家族成员的三维构象相似。烟草品种K326和突变体M867(抗PVY)的BTB/POZ家族基因表达模式分析显示,叶片接种PVY后,NtBTB2M、NtBTB2K、NtBTB2L、NtBTB6E基因的表达丰度显著增加,这可能与烟草M867对PVY的抗性较强有关。顺式作用元件分析显示,NtBTB2K、NtBTB2L、NtBTB2M和NtBTB6E基因的上游2000 bp区域内含有若干逆境响应相关元件,包括水杨酸响应元件、MYB结合位点等,可能和这些基因的上调表达有关。本研究为BTB/POZ蛋白的功能研究提供了理论依据,为烟草抗病育种提供了一定参考。

关键词：烟草 BTB/POZ家族保守基序顺式作用元件

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Fast electrothermal coupling calculation method for supporting digital twin construction of electrical equipment

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High Voltage 2023年第2期8卷 390-400页

作者： Xiaosong zhu Youyuan Wang Ruixiao Meng Shi Long shaowen Wu State Key Laboratory of Power Transmission Equipment and System Security and New Technology(Chongqing University) ChongqingChina

The failure of electrical equipment directly or indirectly caused by overheating has become one of the main reasons for equipment accidents.The real-time condition monitoring method of electrical equipment based on digital twin(DT)has received extensive attention and is considered as a technology with great engineering values and excellent application prospects.However,the current calculation of DT mostly relies on the traditional finite element method(CFEM).This method becomes less computationally efficient as the size of the DT increases,especially for electrical equipment with high complexity.It is difficult to meet the requirements real-time calculation in DT.Therefore,starting from the algorithm optimization and parallel architecture,based on the weighted residual method and stabilised conforming nodal integration,a novel discrete method of electrothermal coupling equation is proposed and the data storage structure of the algorithm from the bottom layer is redesigned,and the corresponding GPU and multi-core CPU parallel framework are proposed.Finally,taking the high voltage bushing as an example,the correctness of the method in this paper is verified by the CFEM code and commercial software ABAQUS.Under the same grid and accuracy requirement,the calculation time is shortened by at least five times than ABAQUS.And the method is easy to extend to other types of multi-physics calculations.

关键词： electrical coupling method

高灵敏度光束位置信号提取的激光通信跟瞄一体化(特邀)

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激光与光电子学进展 2024年第7期61卷 160-165页

作者：陈欣予鲁绍文朱福南樊永波胡琼夏浩伟孙建锋朱韧侯霞陈卫标中国科学院上海光学精密机械研究所航天激光工程部上海201800 中国科学院大学材料与光电研究中心北京100049

提出一种基于四象限探测器跟瞄和通信复用的强度调制直接探测的空间光通信系统,以超声波电机驱动的双光楔为光束偏转执行单元形成光束位置跟踪的闭环系统。驱动电机转动周期为15 ms,位置分辨率为0.83μrad。经理论分析和实验验证,该系... 详细信息

提出一种基于四象限探测器跟瞄和通信复用的强度调制直接探测的空间光通信系统,以超声波电机驱动的双光楔为光束偏转执行单元形成光束位置跟踪的闭环系统。驱动电机转动周期为15 ms,位置分辨率为0.83μrad。经理论分析和实验验证,该系统的位置闭环跟踪−3 dB带宽约为4 Hz。当位置探测误差小于10%时,即光束探测精度小于12μrad,对应的探测灵敏度为−45.2 dBm。在10 Mbit/s的通信速率和无信号编码下,误码率为1×10^(−3)时对应的通信灵敏度为−44 dBm。验证了利用四象限探测器作为跟踪与通信复用探测器的可行性,可应用于小型化、轻量化的星间激光通信终端。

关键词：自由空间光通信四象限探测器位置分辨率跟踪带宽通信灵敏度

Single-atom Cu anchored on N-doped graphene/carbon nitride heterojunction for enhanced photocatalytic H_(2)O_(2) production

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Journal of Materials Science & Technology 2023年第30期161卷 192-200页

作者： Han Li Bicheng zhu Bei Cheng Guoqiang Luo Jingsan Xu shaowen Cao State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Laboratory of Solar Fuel Faculty of Materials Science and ChemistryChina University of GeosciencesWuhan 430078China School of Chemistry and Physics Queensland University of TechnologyBrisbaneQLD 4000Australia

Photocatalytic production of H_(2)O_(2) by polymeric carbon nitride has been regarded as a promising ap-proach for the conversion of solar energy into valuable chemicals.However,the efficiency of pristine car-bon nitride is limited by the rapid charge recombination and the lack of suitable active sites.Herein,we introduce single-atom Cu anchored on N-doped graphene(Cu-NG)as a cocatalyst coupled with carbon nitride via covalent bonding to enhance photocatalytic H_(2)O_(2) production.The Cu-NG/carbon nitride could broaden the light absorption from UV to near-infrared region,contributing to the photocatalytic process.Moreover,NG containing electron-rich N atoms could serve as anchoring sites for stabilizing single-atom Cu.Importantly,the single-atom Cu acts not only as an electron sink to steer the interfacial charge sep-aration but also as an active site for molecular oxygen adsorption and activation.With the synergistic effect of the enhanced interfacial charge separation and suitable active sites,Cu-NG/carbon nitride ex-hibits improved photocatalytic performance with an H_(2)O_(2) generation rate of 2856μmol g^(−1)h^(−1),which is 2.6 times that of pristine carbon nitride.This work provides a protocol for high-performance photocat-alytic H_(2)O_(2) production using a single-atom cocatalyst.

关键词： Single-atom catalysis Interfacial charge separation Photocatalytic H_(2)O_(2)production

基于等离激元超表面的径向和角向偏振矢量光束的产生

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曲阜师范大学学报（自然科学版） 2024年第2期50卷 115-119页

作者：朱邵文杨璐瑶崔国森刘春香山东师范大学物理与电子科学学院山东省济南市250014

为满足信息大容量和快速传输处理的需求,小型平面化集成光学器件正逐渐代替传统的大体积折射器件,可在亚波长尺度进行光波操控的超表面结构为微纳光子学器件设计和相关物理现象的研究提供了全新途径.该文设计了一种由正交纳米缝对组成... 详细信息

为满足信息大容量和快速传输处理的需求,小型平面化集成光学器件正逐渐代替传统的大体积折射器件,可在亚波长尺度进行光波操控的超表面结构为微纳光子学器件设计和相关物理现象的研究提供了全新途径.该文设计了一种由正交纳米缝对组成的表面等离激元(surface plasmon polariton, SPP)超表面,实现了径向和角向偏振矢量涡旋光束的产生.利用惠更斯-菲涅尔原理从理论上推导出螺旋超表面中心区域的表面等离激元光场表达式,并利用时域有限差分法(FDTD)进行了模拟计算.实验搭建显微成像系统采集的SPP光强分布图样与FDTD模拟和理论计算结果吻合得很好,验证了利用该超表面获得径向和角向矢量涡旋光束的可行性.

关键词：超表面矢量光束表面等离激元光场调控

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饲料桑对蛋鸡生产性能、蛋品质及肠道组织形态的影响

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中国畜牧兽医 2024年第2期51卷 540-548页

作者：黄静赵娜郭万正金枫陈芳朱伟樊启文杜恩存陶文静黄少文魏金涛湖北省农业科学院畜牧兽医研究所动物胚胎工程及分子育种湖北省重点实验室武汉430064 咸宁市农业科学院咸宁437000

[目的]探讨饲料桑在蛋鸡养殖上的适宜使用量及其应用效果。[方法]试验选用36周龄京红一号蛋鸡270只,随机分为3组,每组6个重复,每个重复15只鸡。对照组饲喂玉米-豆粕型基础饲粮,2个试验组分别在基础饲料中使用1%、3%饲料桑粉。预饲期2周... 详细信息

[目的]探讨饲料桑在蛋鸡养殖上的适宜使用量及其应用效果。[方法]试验选用36周龄京红一号蛋鸡270只,随机分为3组,每组6个重复,每个重复15只鸡。对照组饲喂玉米-豆粕型基础饲粮,2个试验组分别在基础饲料中使用1%、3%饲料桑粉。预饲期2周,正试期12周。正试期内,按重复记录每日投料量、产蛋数、不合格蛋数、总蛋重和蛋鸡死淘情况,每周记录1次余料量;于试验第4、8、12周末,每个重复随机选取5枚蛋进行蛋品质测定;于试验第12周末,每个重复随机选取1只蛋鸡屠宰后分离十二指肠、空肠、回肠样品,测定肠道组织形态。[结果]与对照组相比,(1)正试期1~4周,1%、3%桑粉组蛋鸡产蛋率均显著降低(P<0.05),1%桑粉组平均蛋重显著降低(P<0.05);9~12周,1%、3%桑粉组蛋鸡产蛋率均显著降低(P<0.05);1~12周全期,1%、3%桑粉组蛋鸡产蛋率、平均蛋重均显著降低(P<0.05),1%桑粉组蛋鸡死淘率显著降低(P<0.05)。(2)正试期第4周末,1%桑粉组蛋壳强度显著提高(P<0.05),蛋黄亮度(L*)显著降低(P<0.05),蛋黄红度(a*)显著提高(P<0.05);第8周末,1%桑粉组蛋黄胆固醇含量显著降低(P<0.05);第12周末,1%桑粉组蛋型指数显著降低(P<0.05),蛋壳强度显著提高(P<0.05),1%、3%桑粉组蛋黄胆固醇含量均显著降低(P<0.05)。(3)第12周末,3%桑粉组蛋鸡回肠肌层厚度显著增加(P<0.05);1%桑粉组回肠绒毛高度、绒隐比显著提高(P<0.05)。[结论]饲粮中使用饲料桑粉可降低蛋鸡死淘率,提升蛋品质,对产蛋性能和蛋鸡肠道形态结构均有一定影响。本试验条件下,在蛋鸡饲粮中使用1%饲料桑粉较为适宜。

关键词：饲料桑蛋鸡生产性能蛋品质肠道组织形态