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膜生物反应器及其在工业废水处理中的应用

化工设计通讯 2024年第8期50卷 134-136页

作者：顾军赵敏燕栾燕张志豪南京宇清环境科技有限公司江苏南京210000 南京沃谱瑞环境研究院有限公司江苏南京210000

膜生物反应器主要是将高效膜分离技术与生物反应器技术有机整合的污水处理技术,采用膜组件替代传统活性污泥法进行沉淀池内污水分离处理,具备固液分离效率高且出水质量好的优势,推广价值明显。基于此,分析膜生物反应器构造和工艺流程、... 详细信息

膜生物反应器主要是将高效膜分离技术与生物反应器技术有机整合的污水处理技术,采用膜组件替代传统活性污泥法进行沉淀池内污水分离处理,具备固液分离效率高且出水质量好的优势,推广价值明显。基于此,分析膜生物反应器构造和工艺流程、应用优势、应用措施,旨在为提高工业废水处理的效率提供助力。

关键词：膜生物反应器工业废水处理应用

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陆上漫反射光通信的安全通信方式

通信技术 2024年第9期57卷 880-885页

作者：焦云燕张智豪陈果周华蒲涛中国人民解放军陆军工程大学通信工程学院江苏南京210007

基于激光的漫反射能提供一种新型的快速便捷的陆上通信手段。针对强对抗环境中可能存在的窃听风险,基于物理层安全的原理建立了存在一个光源、一个合法接收者和一个窃听者的漫反射光通信系统模型。然后,对散射和漫反射两种不同接收方式... 详细信息

基于激光的漫反射能提供一种新型的快速便捷的陆上通信手段。针对强对抗环境中可能存在的窃听风险,基于物理层安全的原理建立了存在一个光源、一个合法接收者和一个窃听者的漫反射光通信系统模型。然后,对散射和漫反射两种不同接收方式的红外波段窃听链路损耗进行了理论分析和仿真比较。结果表明,在通常情况下,漫反射窃听的链路损耗更小、风险更大,应优先使用前向漫反射通信。

关键词：激光漫反射通信物理层安全散射链路损耗

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非线性偏振旋转光纤滤波器模拟

应用技术学报 2024年第3期24卷 321-324,352页

作者：张克赟李文越张志皓李青李威周延上海应用技术大学理学院上海201418

多波长光纤激光器在密集波分复用、非线性频率转换、光纤传感等领域中具有重要应用价值。目前有多种实现多波长光纤激光输出的方式,其中,非线性偏振旋转(NPR)是一种比较常见的方式。理论模拟了NPR光纤滤波器在1550 nm附近的光谱滤波特性... 详细信息

多波长光纤激光器在密集波分复用、非线性频率转换、光纤传感等领域中具有重要应用价值。目前有多种实现多波长光纤激光输出的方式,其中,非线性偏振旋转(NPR)是一种比较常见的方式。理论模拟了NPR光纤滤波器在1550 nm附近的光谱滤波特性,主要包括:在不同的出射角度、光纤双折射和单模光纤长度的条件下,光谱滤波效应的变化情况;自由光谱范围与激光中心波长、正交偏振方向光程差之间的关系。通过对NPR光纤滤波器的光谱滤波效应进行系统地模拟,确立不同参数对滤波效应的作用规律,为相关的多波长光纤激光器的实验研究提供有效指导。

关键词：非线性偏振旋转(NPR) 光纤滤波器双折射多波长光谱

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大渡河流域极端气温时空分布特征研究

水利水电技术（中英文） 2024年第9期55卷 10-25页

作者：张志昊李晓兵张鹏梁瑞峰王庆丰郭为王远铭李克锋四川大学山区河流保护与治理全国重点实验室四川成都610065 中水北方勘测设计研究院有限责任公司天津300222 中国五冶集团有限公司四川成都610063

【目的】全球气候变化下,极端气候事件发生的频率、强度等日益增强,其可对流域环境等产生重大影响。大渡河流域不仅是我国长江上游生态屏障和川滇生态屏障的重要组成部分,也是长江流域干旱半干旱河谷的重点分布区域,流域内保护鱼类分布... 详细信息

【目的】全球气候变化下,极端气候事件发生的频率、强度等日益增强,其可对流域环境等产生重大影响。大渡河流域不仅是我国长江上游生态屏障和川滇生态屏障的重要组成部分,也是长江流域干旱半干旱河谷的重点分布区域,流域内保护鱼类分布较多,对气候变化敏感。为此,探究大渡河流域极端气温指数时空分布特征。【方法】以大渡河流域为研究对象,基于该流域1964—2018年共55年的逐日气象数据,采用线性拟合、Sen′s斜率估计以及Mann-Kendall非参数检验等方法对大渡河流域的极端气温指数进行了分析;利用协同克里金法进行空间插值,分析了极端气温指数的空间分布规律。【结果】大渡河流域极端气温事件存在明显的年际变化,16个极端气温指数中有11个指数呈上升趋势,5个指数呈下降趋势。除气温极值外,上升速率最快的是SU25,上升速率为2.0 d/10 a;下降速率最快的是FD0,下降速率为1.6 d/10 a。除CSDI和WSDI在流域内变化趋势为0外,其余各极端气温指数变化速率在空间分布上有明显的差异性,海拔高度为导致大渡河流域极端气温指数空间分布特征的主要影响因子。【结论】在时间尺度上,大渡河流域极端气温指数中表征暖的指数均呈上升趋势;表征冷的指数(除TNn和TNx外)均呈下降趋势;其他指数中GSL上升速率较快。这表明该流域在近55年内整体呈变暖趋势,冬季变短夏季变长,且适宜植被生长的温度持续时间增长。突变检验表明各极端气温指数突变除TN10外均为显著突变,且突变年份集中在2000年前后。在空间尺度上,冷指数中ID0、FD0上游上升速率高于中下游,暖指数中TR20、SU25中下游上升速率大于上游,GSL上游上升速率明显高于中下游。流域整体呈变暖趋势且中下游更容易发生极端高温事件。研究成果可为大渡河流域极端气候灾害预警和水生态保护提供科学依据。

关键词：极端气温时空分布大渡河流域气候变化长江流域 Mann-Kendall检验克里金法水生态保护

基于仿人发育的混合空域智能无人机防碰撞策略研究

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计算机测量与控制 2024年第2期32卷 206-212页

作者：雷鹏飞魏贤智张启瑞齐铎张志浩空军工程大学空管领航学院西安710051 空军工程大学航空工程学院西安710051 中国人民解放军93525部队西藏日喀则857060

随着低空开放政策的实施,无人机将会脱离隔离空域,进入低空与各式各样飞行器混合进行飞行;而防碰撞能力作为无人机的关键技术,在混合空域中保持无人机安全飞行起到了至关重要的作用;通过对人的发育式学习防碰撞机理进行分析,建立了面向... 详细信息

随着低空开放政策的实施,无人机将会脱离隔离空域,进入低空与各式各样飞行器混合进行飞行;而防碰撞能力作为无人机的关键技术,在混合空域中保持无人机安全飞行起到了至关重要的作用;通过对人的发育式学习防碰撞机理进行分析,建立了面向混合空域中密集障碍的实体模型和发育模型,最终构建了基于仿人发育的无人机防碰撞方法;仿真实验表明,提出的方法不仅使无人机可以通过学习与发育不断提高飞行安全性,而且还可以随着环境熟悉度的提升,加快无人机防碰撞行为,提高了无人机在混合空域密集障碍中的安全性与智能性。

关键词：无人机混合空域防碰撞发育

Study of double-chamber air arc plasma torch and the application in solid-waste disposal

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Plasma Science and Technology 2021年第6期23卷 48-58页

作者： Yawen CAO Bin LI Xianwei HAN Chang TAN zhihao zhang Xizhe zhang Jianguo WEI Shanxi Key Laboratory of Plasma Physics and Applied Technology Xi'an 710100People's Republic of China State Key Laboratory of Liquid Rocket Science and Technology Xi'an 710100People's Republic of China Academy of Aerospace Propulsion Technology Xi'an 710100People's Republic of China

Arc plasma can be applied in hazardous solid waste disposal for higher temperature than common heating methods,but some practical issues exist in practical engineering *** this study,an air arc plasma torch with double chambers and magnetic controlling is designed to realize wide variable power and long electrode *** detailed characteristics and laws of the air arc are *** condition parameters of arc current(I),air flow rate(G)and the structure parameters of inlet area ratios and electrode diameters influence both the arc voltage and arc root *** arc rotating driven by magnetic field effectively lengthens the electrode *** gasification process and product of organic wastes by air plasma are influenced largely by the waste compositions and the air flow rate.A furnace structure with more even atmosphere and longer residence time should be considered for better ***-deficient environment is important to suppress NOxformation during the application of air *** solid wastes can be melt by the air plasma and cooled down to form compact vitreous structures in which heavy metals can be locked and the leaching rates significantly decrease down.

关键词： air arc plasma electrical characteristic electrode life gasification melting

cPCN-Regulated SnO_(2) Composites Enables Perovskite Solar Cell with Efficiency Beyond 23%

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Nano-Micro Letters 2021年第7期13卷 12-27页

作者： Zicheng Li Yifeng Gao zhihao zhang Qiu Xiong Longhui Deng Xiaochun Li Qin Zhou Yuanxing Fang Peng Gao CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002FujianPeople’s Republic of China College of Chemistry Fuzhou UniversityFuzhou 350116People’s Republic of China Laboratory for Advanced Functional Materials Xiamen Institute of Rare Earth MaterialsHaixi InstituteChinese Academy of SciencesXiamen 361021People’s Republic of China

Efficient electron transport layers(ETLs)not only play a crucial role in promoting carrier separation and electron extraction in perovskite solar cells(PSCs)but also significantly affect the process of nucleation and growth of the perovskite ***,crystalline polymeric carbon nitrides(cPCN)are introduced to regulate the electronic properties of SnO_(2) nanocrystals,resulting in cPCN-composited SnO_(2)(SnO_(2)-cPCN)ETLs with enhanced charge transport and perovs-kite layers with decreased grain ***,SnO_(2)-cPCN ETLs show three times higher electron mobility than pristine SnO_(2) while offering better energy level alignment with the perovskite *** SnO_(2)-cPCN ETLs with decreased wettability endow the perovskite films with higher crystallinity by retarding the crystallization *** the end,the power conversion efficiency(PCE)of planar PSCs can be boosted to 23.17%with negligible hysteresis and a steady-state efficiency output of 21.98%,which is one of the highest PCEs for PSCs with modified SnO_(2) ***_(2)-cPCN based devices also showed higher stability than pristine SnO_(2),maintaining 88%of the initial PCE after 2000 h of storage in the ambient environment(with controlled RH of 30%±5%)without encapsulation.

关键词： Electron transport layer Perovskite solar cell Carbon nitride SnO_(2)

One-step assembly of Pd-Keggin-polyoxometalates for catalytic benzothiadiazole generation and derived cell-imaging probe application

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Chinese Chemical Letters 2023年第6期34卷 545-550页

作者： Xianqiang Huang Weilong Cui Sen Liu Gang Liu Yalin zhang zhihao zhang Guodong Shen Zhen Li Jianyong Wang Yifa Chen Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology School of Chemistry&Chemical EngineeringLiaocheng UniversityLiaocheng 252059China Key Laboratory of Biobased Material and Green Papermaking Key Laboratory of Pulp&Paper Science and Technology of Shandong Province/Ministry of EducationQilu University of Technology(Shandong Academy of Sciences)Ji’nan 250353China National and Local Joint Engineering Research Center of MPTES in High Energy and Safety LIBs Engineering Research Center of MTEES(Ministry of Education)Key Lab.of ETESPG(GHEI)South China Normal UniversityGuangzhou 510006China Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials Jiangsu Key Laboratory of New Power BatteriesSchool of Chemistry and Materials ScienceNanjing Normal UniversityNanjing 210023China

One-step assembly of organic-ligand modified Pd-Keggin-POMs has been rarely reported,so as for their applications in catalytic benzothiadiazole generation and derived cell-imaging ***,three PdKeggin-POMs(compounds 1-3)have been successfully synthesized via a one-step assembly ***-obtained Pd-Keggin-POMs with well-defined structures and heterogeneous properties enable highly efficient catalytic benzothiadiazole ***,compound 3 showed outstanding catalytic activities in Suzuki-Miyaura coupling reactions for the generation of benzothiadiazole derivatives(yields,90%-97%)and was represented as one of the best catalysts reported to ***,the obtained benzothiadiazoles were used as the bio-probe for tracking lipid droplets in living-cells and exhibited large Stokes shifts(130 nm),low cytotoxicity and good targeting,which could be also applied to mark the distribution of LDs in living He La *** investigations clearly decipher the functions of PdKeggin-POMs toward finding novel bio-probe materials,highlighting a new insight into the generation of sustainable materials in life-science.

关键词： Metal-organic-pallidum-POMs Crystal structure Suzuki-Miyaura Fluorescent probe LDs

High-fidelity transfer of area-selective atomic layer deposition grown HfO_(2)through DNA origami-assisted nanolithography

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Nano Research 2022年第6期15卷 5687-5694页

作者： Xiaowan Yuan Daiqin Xiao Wei Yao zhihao zhang Lin Yang Liyuan zhang Yibo Zeng Jiaqi Liao Shanxiong Luo Chonghao Li Hong Chen Xiangmeng Qu Key Laboratory of Sensing Technology and Biomedical Instruments of Guangdong Province and School of Biomedical Engineering Sun Yat-sen UniversityShenzhen 518107China Pen-Tung Sah Institute of Micro-Nano Science and Technology School of Electronic Science and Engineering(National Model Microelectronics College)Xiamen UniversityXiamen 361005China Harvard John A.Paulson School of Engineering and Applied Sciences Harvard UniversityCambridgeMA 02138USA Jiujiang Research Institute of Xiamen University Jiujiang 332000China

DNA origami-assisted nanolithography(DOANL)for fabricating custom-designed nanomaterials through pattern transfer from DNA origami to different substrates materials are ***,the pattern's integrity and resolution face considerable challenges due to the uncontrollable growth of the nanomaterials during transformation and the unclear mechanism of ***,we report a DOANL combined with area-selective atomic layer deposition(ALD)strategy for fabricating custom shapes hafnium oxide(HfO2)with the high-fidelity and *** find that the HfO_(2)selectively grows on DNA origami substrates in a hydroxyl-rich area instead of a methyl-rich protective *** with the merit of the area-selective ALD method,theHfO_(2)atom selectively coated on the DNA origami surface,thus,precisely modeling the shapes with high-precision in our study based on the surface groups difference of DNA origami and the naked hexamethyldisilane(HMDS)-treated substrates,which reveal the mechanical of high-fidelity pattern transfer based on *** a result,DNA origami structures can program the shape ofHfO_(2)*** DOANL that is based on the principle of"bottom-up"precision assembly breaks through the shape complexity and high-throughput fabrication limitation of theHfO_(2)nanostructures,including two-and three-dimensional structures,plane and curved structures,monolithic and hollow *** on the"top-down"accurate fabrication principle,the area-selective ALD on methyl-rich protective layer substrates improves the integrity and resolution of the pattern transfer ***,this work provides a general technology for nanofabrication strategy.

关键词： DNA origami masks DNA Origami-assisted nanolithography HfO_(2) area-selective atomic layer deposition