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Phase-Dislocation-Mediated High-Dimensional Fractional Acoustic-Vortex Communication

Research 2024年第3期2023卷 575-584页

作者： Ruijie Cao Gepu Guo Wei Yue Yang Huang Xinpeng Li chengzhi kai Yuzhi Li Juan Tu Dong Zhang Peng Xi Qingyu Ma School of Computer and Electronic Information Nanjing Normal UniversityNanjing 210023China Department of Biomedical Engineering College of Future TechnologyPeking UniversityBeijing 100871China nstitute of Acoustics Nanjing UniversityNanjng 210093China National Biomedical Imaging Center Peking UniversityBeijing 100871China

With unlimited topological modes in mathematics,the fractional orbital angular momentum(FOAM)demonstrates the potential to infinitely increase the channel capacity in acoustic-vortex(AV)***,the accuracy and stability of FOAM recognition are still limited by the nonorthogonality and poor anti-interference of fractional AV *** popular machine learning,widely used in optics based on large datasets of images,does not work in acoustics because of the huge engineering of the 2-dimensional point-by-point ***,we report a strategy of phase-dislocation-mediated high-dimensional fractional AV communication based on pair-FOAM multiplexing,circular sparse sampling,and machine *** unique phase dislocation corresponding to the topological charge provides important physical guidance to recognize FOAMs and reduce sampling points from theory to practice.A straightforward convolutional neural network considering turbulence and misalignment is further constructed to achieve the stable and accurate communication without involving experimental *** experimentally present that the 32-point dual-ring sampling can realize the 10-bit information transmission in a limited topological charge scope from±0.6 to±2.4 with the FOAM resolution of 0.2,which greatly reduce the divergence in AV *** infinitely expanded channel capacity is further verified by the improved FOAM resolution of *** with other milestone works,our strategy reaches 3-fold OAM utilization,4-fold information level,and 5-fold OAM *** of the extra advantages of high dimension,high speed,and low divergence,this technology may shed light on the next-generation AV communication.

关键词： infinitely topological fractional

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基于轨道角动量谱分解的多通道水声通信及系统实现

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南京师大学报（自然科学版） 2024年第1期47卷 103-110页

作者：开诚治刘天颀王青东李禹志郭各朴马青玉南京师范大学计算机与电子信息学院/人工智能学院江苏南京210023 山东科技大学海洋工程学院山东青岛266590

水声通信能够实现信息的长距离传输,在深海探索和军事领域发挥重要作用.然而,由于换能器带宽和声波波长的影响,水声通信的发展与应用受到传输衰减大和信道容量低以及频谱利用率不足的限制.本文结合复用涡旋声束(AV)和轨道角动量(OAM)谱... 详细信息

水声通信能够实现信息的长距离传输,在深海探索和军事领域发挥重要作用.然而,由于换能器带宽和声波波长的影响,水声通信的发展与应用受到传输衰减大和信道容量低以及频谱利用率不足的限制.本文结合复用涡旋声束(AV)和轨道角动量(OAM)谱分解技术,研究了基于环形收发阵列的多通道水声通信方法,并系统实现.基于发送数据的ASCII编码,利用全息信号的幅度和相位调制,驱动环形换能器阵列发射沿轴传输的多通道OAM复用涡旋声束,并通过环形换能器阵列的信号采样和OAM谱分解完成复用涡旋声束的OAM模态解码,实现了高效的并行数据传输.构建了8声源环形收发阵列和全息相控系统,开展了6通道水声通信研究,成功实现了复用涡旋声场的实验测量和OAM解码,并与传统单通道二进制串行数据通信进行性能比较.理论和实验结果证明,基于OAM谱分解的通信通道数由发射阵列的阵元数N决定,其解码精度由发射信号的相位精度和接收阵列的阵元数决定;阵元数N≥1的大阵列系统在满OAM模式复用条件下的传输速率约为传统水声通信的N倍.本研究表明基于OAM谱分解的多通道通信可大幅提高信道容量和频谱利用率,为其在水声通信中的实际应用提供了一种实用方案.

关键词：多通道水声通信轨道角动量复用环形收发阵列全息信号谱分解

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澜沧江下游补远江大型底栖动物群落结构的时空分布及其影响因素

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湖泊科学 2024年第2期36卷 536-547页

作者：鲍思敏张凯丁城志陶捐王军华中农业大学水产学院武汉430070 云南大学国际河流与生态安全研究院昆明650091

自然流淌的支流在维持建坝河流水生生物多样性中起着重要作用。补远江是澜沧江下游的重要一级支流,保持了较为天然的河流状态,人类活动干扰相对较少,是流域土著鱼类保护区和水生生物重要栖息地。在澜沧江流域水电开发的背景下,掌握补远... 详细信息

自然流淌的支流在维持建坝河流水生生物多样性中起着重要作用。补远江是澜沧江下游的重要一级支流,保持了较为天然的河流状态,人类活动干扰相对较少,是流域土著鱼类保护区和水生生物重要栖息地。在澜沧江流域水电开发的背景下,掌握补远江大型底栖动物群落结构的时空分布及其影响因素,对澜沧江乃至西南河流的水生生物多样性保护和恢复具有重要参考意义。于2019年4月(旱季)和2019年10月(雨季)对补远江的大型底栖动物进行了详细调查,共检出大型底栖动物150个分类单元,隶属于5门7纲68科,其中水生昆虫121种,软体动物20种,蛭类3种,寡毛类2种,甲壳类2种,涡虫、线虫各1种。毛翅目和蜉蝣目为全流域优势类群。补远江底栖动物密度和生物量在旱季和雨季均表现为上游大于中下游,物种丰富度和Shannon-Wiener多样性指数在雨季显著高于旱季。功能摄食类群中,滤食者(41.09%)和收集者(31.81%)占绝对优势,其次为刮食者(11.00%)、捕食者(11.21%),撕食者(4.89%)较少。Mantel检验分析表明,河宽(RW)、硝态氮(NO_(3)^(-)-N)、化学需氧量(COD Mn)是影响补远江大型底栖动物群落结构的主要环境因子;不同功能摄食类群所受到的环境影响因素不同。生物指数(BI)和生物监测工作组记分(BMWP)系统评价显示,补远江大部分样点处于良好及以上水平,少数样点处于中等及以下水平,总体水生态状况良好。

关键词：补远江澜沧江湄公河大型底栖动物群落结构功能摄食类群

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Membrane fouling reduction through electrochemically regulating flocs aggregation in an electro-coagulation membrane reactor

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Journal of Environmental Sciences 2019年第9期31卷 144-151页

作者： kai Zhao Jingqiu Sun chengzhi Hu Jiuhui Qu State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China University of Chinese Academy of Sciences Beijing 100049 China

Coupling coagulation and applied electric field is an efficient method to regulate cake layer porosity and hydrophilicity for alleviating ultrafiltration membrane(UF) fouling. However,the Al/Fe flocs aggregation behavior are induced from electric field and determine the cake layer structure, which has not been studied comparatively yet. Herein, the anti-fouling performance in an efficient electro-coagulation membrane reactor(ECMR, in which UF membrane modules are placed between electrodes) was investigated with Al/Fe anode and various electrochemical parameters from the viewpoint of regulating flocs *** the cake layers formed from Al and Fe flocs under an electric field were more porous and hydrophilic in comparison with that formed without electric fields, resulting in an enhanced water flux under higher electric field strength. Comparing with Fe flocs, Al flocs had a faster growth rate and larger size, facilitating membrane pore block resistant, which was more pronounced in a higher current density. Furthermore, the cake layer formed from Al flocs was more porous than that formed from Fe flocs. Therefore, the anti-fouling performance of ECMR with Al anode was superior to that of ECMR with Fe anode. When the electric field strength increased from 0 to 10 V/cm, the normalized specific flux was improved from 71.2% to 89.4% for ECMR(Al) and from 48.1% to 70.1% for ECMR(Fe) at 30 min.

关键词： Electrocoagulation Ultrafiltration Membrane fouling Electric field Cake layer

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AAR与锈蚀对钢筋-混凝土黏结性能的耦合劣化试验研究

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水利水电快报 2024年第2期45卷 80-87页

作者：李鹏飞张媛王凯弓扶元汪承志重庆交通大学河海学院重庆400047 中交公路规划设计院有限公司北京100010 浙江大学建筑工程学院浙江杭州310058

为研究碱骨料反应(Alkali-Aggregate Reaction,AAR)和锈蚀对钢筋-混凝土黏结性能影响的损伤机理,试验制备了一系列不同钢筋直径的混凝土拉拔试件,通过测量混凝土的膨胀量、钢筋锈蚀质量损失以及相应的拉拔试验,评估不同程度损伤对黏结... 详细信息

为研究碱骨料反应(Alkali-Aggregate Reaction,AAR)和锈蚀对钢筋-混凝土黏结性能影响的损伤机理,试验制备了一系列不同钢筋直径的混凝土拉拔试件,通过测量混凝土的膨胀量、钢筋锈蚀质量损失以及相应的拉拔试验,评估不同程度损伤对黏结性能的影响。得到了耦合损伤下碱骨料膨胀和钢筋锈蚀对黏结性能影响的量化结果,并阐明了黏结性能的劣化规律。结果表明:短期耦合损伤下,AAR凝胶和锈蚀产物填充混凝土孔隙以提高黏结强度;随着损伤程度加剧,反应产物膨胀应力释放,黏结强度开始下降。长期耦合损伤作用会严重劣化混凝土性能,造成混凝土黏结性能严重劣化。研究结果可为钢筋混凝土工程设计与维护提供参考。

关键词：碱骨料膨胀钢筋锈蚀钢筋混凝土结构耦合损伤黏结性能

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A Novel Molecular Imprinted Polymers-Based Lateral Flow Strip for Sensitive Detection of Thiodiglycol

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Journal of Analysis and Testing 2023年第2期7卷 110-117页

作者： Yujie Luo Qichao Ye Tianjin Xie Jiali Xie kai Mao Hongyan Zou Yuanfang Li chengzhi Huang Shujun Zhen Key Laboratory of Luminescence Analysis and Molecular Sensing(Southwest University) Ministry of Education College of Chemistry and Chemical EngineeringSouthwest UniversityChongqing 400715China Key Laboratory of Luminescent and Real-Time Analytical System(Southwest University) Chongqing Science and Technology BureauCollege of Pharmaceutical SciencesSouthwest UniversityChongqing 400715China

Traditional detection of thiodiglycol(TDG),a metabolic marker for sulfur mustard poisoning,requires not only professional operators,but also expensive reagents and large ***,we developed a novel molecular imprinted polymers(MIPs)-based lateral flow assay(LFA)strategy for the quick,sensitive,and selective detection of *** nanoparticles(Au NPs),MIPs,and metallothioneins(MTs)were respectively loaded on the conjugate pad,test line(T line)and control line(C line).After adding TDG,Au NPs on the conjugate pad reacted with TDG through the Au-S bond ***,under the action of capillary force,the conjugates of TDG and Au NPs were trapped by the MIPs as they traveled to the T line,and the residual Au NPs bound with the MTs on the C line,exhibiting two obvious red bands on T line and C line,*** contrast,a single red band could be observed on C line without *** method exhibited a wide linear range from 10.0 pg/m L to 10,000.0 ng/m L and its limit of detection(LOD)was as low as 0.41 pg/m *** method was successfully utilized to detect TDG in human urine,presenting significant potential in the point-of-care testing of TDG in clinical samples of the sulfur mustard poisoning patients.

关键词： Molecular imprinted polymers Lateral flow assay Thiodiglycol

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基于C30加速器的^(89)Zr制备工艺研究

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原子能科学技术 2024年第5期58卷 1145-1151页

作者：温凯段菲李光马承伟王晓明赵紫宇褚浩淼李超王成志王春林原子高科股份有限公司北京102413 国家原子能机构核技术(放射性药物工程转化)研发中心北京102413 中国核工业集团有限公司放射性药物工程技术研究中心北京102413

^(89)Zr具有良好的衰变特性和适宜的半衰期,在PET免疫显像领域具有广阔的应用前景。本文基于C30加速器固体靶系统设计开发了新型硬币靶,同时对^(89)Zr核素制备工艺进行了研究。将钇箔装配于硬币靶后转移至C30加速器固体靶系统辐照2~4 h... 详细信息

^(89)Zr具有良好的衰变特性和适宜的半衰期,在PET免疫显像领域具有广阔的应用前景。本文基于C30加速器固体靶系统设计开发了新型硬币靶,同时对^(89)Zr核素制备工艺进行了研究。将钇箔装配于硬币靶后转移至C30加速器固体靶系统辐照2~4 h,初始质子能量为16.5 MeV,采用质子束流降能器装载0.4 mm厚碳膜进行衰变处理,获得约13.8 MeV的次级束流辐照在靶片上。将辐照后的靶片装入溶靶槽,采用自主开发的自动化分离装置装载羟肟酸树脂进行靶片溶解和分离纯化,最终获得^(89)Zr核素。分析测定了^(89)Zr的放射性核纯度、放射化学纯度及元素杂质含量等质量指标。检验结果显示,^(89)Zr核素批产能可达到5 GBq,放射性核纯度大于99.9%,放射化学纯度大于97%,主要元素杂质含量均低于2.5μg/GBq。通过自主设计的直冷型硬币靶系统成功制备了质量可控的^(89)Zr核素,实现了^(89)Zr核素的规模化国内供应。

关键词： ^(89)Zr ^(89)Y固体靶质子回旋加速器核素制备

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Real-time observation of frequency Bloch oscillations with fibre loop modulation

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Light(Science & Applications) 2021年第3期10卷 434-442页

作者： Hao Chen NingNing Yang chengzhi Qin Wenwan Li Bing Wang Tianwen Han Chi Zhang Weiwei Liu kai Wang Hua Long Xinliang Zhang Peixiang Lu School of Physics and Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China

Bloch oscillations(BOs)were initially predicted for electrons in a solid lattice to which a static electric field is *** observation of BOs in solids remains challenging due to the collision scattering and barrier tunnelling of ***,analogies of electron BOs for photons,acoustic phonons and cold atoms have been experimentally demonstrated in various lattice ***,BOs in the frequency dimension have been proposed and studied by using an optical micro-resonator,which provides a unique approach to controlling the light ***,the finite resonator lifetime and intrinsic loss hinder the effect from being observed ***,we experimentally demonstrate BOs in a synthetic frequency lattice by employing a fibre-loop circuit with detuned phase *** show that a detuning between the modulation period and the fibre-loop roundtrip time acts as an effective vector potential and hence a constant effective force that can yield BOs in the modulation-induced frequency *** a dispersive Fourier transformation,the pulse spectrum can be mapped into the time dimension,and its transient evolution can be precisely *** study offers a promising approach to realising BOs in synthetic dimensions and may find applications in frequency manipulations in optical fibre communication systems.

关键词： fibre Bloch dimension

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加速器生产^(103)Pd的厚铑靶制备工艺研究

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同位素 2024年第1期37卷 55-63页

作者：马承伟段菲褚浩淼李光王晓明赵紫宇李超王成志温凯原子高科股份有限公司北京102413 国家原子能机构核技术(放射性药物工程转化)研发中心北京102413 中核集团放射性药物工程技术研究中心北京102413

铑靶的制备是加速器生产核素^(103)Pd的关键技术。为制得致密、稳定、厚度高的铑靶,采用改性工艺对硫酸铑溶液进行预处理,并加入一定量电镀添加剂A,得到低应力镀铑液。实验靶片选择金属铜材质,靶片面积约100 mm×10 mm。分别针对电镀过... 详细信息

铑靶的制备是加速器生产核素^(103)Pd的关键技术。为制得致密、稳定、厚度高的铑靶,采用改性工艺对硫酸铑溶液进行预处理,并加入一定量电镀添加剂A,得到低应力镀铑液。实验靶片选择金属铜材质,靶片面积约100 mm×10 mm。分别针对电镀过程中的电源电流密度、电镀温度、H_(2)SO_(4)浓度、电镀添加剂A浓度等进行条件实验,获得最佳电镀条件。结果表明,选用最佳电镀条件下,连续四个批次制备的铑镀层质量厚度均大于150 mg/cm^(2),在热冲击实验和坠落实验中,镀层未出现起皮、脱落等问题,镀层致密、平整、与基底结合牢固。在C30回旋加速器内辐照5~51.5 h,可以获得产额5.18~6.04 MBq/(μA·h)、核纯度大于99.9%的^(103)Pd核素。本研究解决了脉冲电镀法制备铑靶工艺稳定性差的问题,制备的厚铑靶可满足^(103)Pd批量化生产要求。

关键词： ^(103)Pd 核素制备回旋加速器脉冲电镀近距离治疗

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Olfactory schwannoma:a case report

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Oncology and Translational Medicine 2018年第6期4卷 259-262页

作者： Weidong Wu Xiaozhen Zhan Kezhen Wang chengzhi Cui kai Xu Peiyu Cong Department of Neurosurgery Dalian Municipal Central HospitalDalian 116033China Dalian Medical University Dalian 116044China

Objective Intracranial schwannomas are frequently located in the VIII cranial nerve, followed by the V and VII cranial nerves, but are quite rare in the olfactory cranial nerves. Here, we report a case of an olfactory schwannoma and review the literature to improve the diagnosis and treatment of olfactory schwannoma. Methods We report a case of olfactory schwannoma in a 51-year-old Chinese man who experienced dizziness and no other *** Magnetic resonance imaging(MRI) showed a neoplastic mass located on the anterior cranial base to the right of the midline and near the cribriform plate and sphenoidal plane. The lesion travelled through the cribriform plate into the nasal cavity. This mass was initially thought to be an olfactory groove meningioma. We performed a craniotomy for surgical excision, and the tumor was completely resected, and the skull base was reconstructed at the same time. There were no complications during surgery, and the patient recovered well. The histopathological diagnosis was a *** Olfactory schwannomas are extremely rare and similar to olfactory ensheating cell tumors, and the immunohistochemical staining of leukocyte antigen 7(Leu7/CD57) can be used to identify them. Although the standard treatment of olfactory schwannoma remains unclear, in all reports, most patients can have excellent prognosis after an effective surgical resection.

关键词： olfactory schwannoma anterior skull base schwannoma schwannoma diagnosis treatment

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