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合法性与正当性:大综合行政执法中正当程序的实践应用

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昆明理工大学学报（社会科学版） 2024年第2期24卷 1-9页

作者：佴澎杨丰合云南财经大学法政学院云南昆明650221 中南财经政法大学法学院湖北武汉430073

“完善行政执法体制改革,全面推进严格规范公正文明执法”是党在二十大报告中作出的明确指示。随着执法改革的纵深推进,由“综合”到“大综合”的改革思路获得了全新发展。“横向整合”或“纵向整合”的两种模式切实解决了多头执法、多... 详细信息

“完善行政执法体制改革,全面推进严格规范公正文明执法”是党在二十大报告中作出的明确指示。随着执法改革的纵深推进,由“综合”到“大综合”的改革思路获得了全新发展。“横向整合”或“纵向整合”的两种模式切实解决了多头执法、多层执法和重复执法的问题。然而,在行政处罚权不断集中、执法权不断下沉、基层执法力量却相对薄弱的现实情况下,如此批量的权力事项归集,亦不可避免地引发了执法程序不规范、执法方式简单粗暴等问题,带来了单一执法到综合执法的职权整合困境以及部门执法到属地执法的基础保障困境。基于此,将正当程序制度应用到大综合行政执法改革的具体实践中,充分发挥其对效率、公正、秩序的保障作用,将有利于补充法定程序的不足,切实提高综合行政执法的水平,推进基层社会治理向系统性、整体性和协同性发展。

关键词：综合行政执法执法下沉正当程序法定程序基层社会治理

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Proton radiation effects on high-speed silicon Mach-Zehnder modulators for space application

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Science China(Information Sciences) 2022年第12期65卷 301-312页

作者： Changhao HAN Zhaoyi HU Yuansheng TAO Engang FU Yandong HE fenghe yang Jun QIN Xingjun WANG State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Peking University State Key Laboratory of Nuclear Physics and Technology School of Physics Peking University Institute of Microelectronics School of Integrated Circuits Peking University Peking University yangtze Delta Institute of Optoelectronics Frontier Science Center for Nano-optoelectronics Peking University Peng Cheng Laboratory

In this paper, performance degradation effects on high-speed silicon Mach-Zehnder modulators under proton radiation were investigated for future space environment applications. The test devices were exposed to 3-MeV protons of three fluence levels(5×1013, 2×1014, and 5×1015ions/cm2), which is comparable to the radiation amount for operating in a harsh space environment after several decades. The performance of the silicon modulator after radiation was characterized in terms of modulation efficiency and eye *** results illustrate that the modulation efficiency is significantly reduced after proton radiation and shows an obvious decrease with increasing radiation fluence. The extinction ratios of the on-off keying(OOK) eye diagram are obviously dropped with increasing radiation fluence and correspond well to modulation efficiency degradation. Furthermore, three representative states for data transmission are demonstrated under three fluences, from still working to the critical state and eventually complete fail. Displacement damage and ionization damage are the two major mechanisms during proton radiation, which lead to the bulk defects and accumulating defect charges and cause performance degradation of silicon Mach-Zehnder modulators.

关键词： silicon Mach-Zehnder modulator proton radiation space application silicon photonics optical communication

Electrospinning of a sandwich-structured membrane with sustained release capability and long-term anti-inflammatory effects for dental pulp regeneration

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Bio-Design and Manufacturing 2022年第2期5卷 305-317页

作者： fenghe yang Jiangxue Wang Xiaoyu Li Zhenzhen Jia Qiang Wang Dazhi Yu Jinyu Li Xufeng Niu Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education Beijing Advanced Innovation Center for Biomedical EngineeringSchool of Biological Science and Medical EngineeringBeihang UniversityBeijing 100083China Department of Burn Plastic Surgery 80th Army Hospital of PLAWeifang 261021China Department of Hand Surgery 971st Army Hospital of PLAQingdao 266000China Department of Orthopaedics Dongzhimen HospitalBeijing University of Chinese MedicineBeijing 100700China

Current electro spun membranes used for pulp capping still lack the sustained-release capability and long-term anti-inflammatory effects that are favorable for dental pulp *** this work,a single-layered poly(lac tic acid)(PLA)electro spun membrane loaded with amorphous calcium phosphate(ACP)and aspirin(PLA/ACP/Aspirin membrane,i.e.,PA A membrane)is sandwiched between two poly(lactic-co-glycolic acid)(PLGA)electro spun membranes as a novel sandwich-structured PLGA and PA A composite electro spun membrane(PLGA-PAA membrane)to resolve the need for sustained-release design and anti-inflammatory *** angle measurements indicate that the PLGA-PAA membrane is more hydrophilic than the PAA *** in vitro release study reveals that PLGA membranes coated on PAA membrane could slightly slow down ion release,while signiificantly prolonging aspirin *** also co-cultured membranes with dental pulp stem cells(DPSCs)and human monocytic THP-1 cells to evaluate their osteogenic ability and anti-inflammatory effects,*** with the PAA membrane,the PLGA-PAA membrane promotes cell adhesion,proliferation,and osteogenic differentiation.A prolonged anti-inflammatory effect of up to 18 days is also observed in the PLGA-PAA *** results suggest a promising strategy for fabricating an electro spun membrane system with controlled release capabilities and long-term anti-inflammatory effects for use as pulp-capping material for regeneration of the dentin-pulp complex.

关键词： Electrospinning Sandwich-structured Pulp capping Controlled release Anti-inflammatory effects

Demonstration of an on-chip TE-pass polarizer using a silicon hybrid plasmonic grating

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Photonics Research 2019年第3期7卷 289-293页

作者： BOWEN BAI fenghe yang ZHIPING ZHOU State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Engineering and Computer Science Peking University Peking University Shenzhen Research Institute

An on-chip, high extinction ratio transverse electric(TE)-pass polarizer using a silicon hybrid plasmonic grating is proposed and experimentally demonstrated. Utilizing plasmonics to manipulate the effective index and mode distribution, the transverse magnetic mode is reflected and absorbed, while the TE mode passes through with relatively low propagation loss. For a 6-μm-long device, the measurement result shows that the extinction ratio in the wavelength range of 1.52 to 1.58 μm varies from 24 to 33.7 dB and the insertion loss is 2.8–4.9 dB. Moreover,the structure exhibits large alignment tolerance and is compatible with silicon-on-insulator fabrication technology.

关键词： TE-pass polarizer using silicon hybrid plasmonic grating transverse magnetic mode

16-channel photonic–electric co-designed silicon transmitter with ultra-low power consumption

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Photonics Research 2023年第2期11卷 143-149页

作者： JINGBO SHI MING JIN TAO yang HAOWEN SHU fenghe yang HAN LIU YUANSHENG TAO JIANGRUI DENG RUIXUAN CHEN CHANGHAO HAN NAN QI XINGJUN WANG State Key Laboratory of Advanced Optical Communication Systems and Networks School of ElectronicsPeking UniversityBeijing 100871China College of Engineering Peking UniversityBeijing 100871China Peking University yangtze Delta Institute of Optoelectronics Nantong 226010China State Key Laboratory of Superlattices and Microstructures Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Center of Material Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Frontier Science Center for Nano-optoelectronics Peking UniversityBeijing 100871China

A hybrid integrated 16-channel silicon transmitter based on co-designed photonic integrated circuits(PICs) and electrical chiplets is demonstrated. The driver in the 65 nm CMOS process employs the combination of a distributed architecture, two-tap feedforward equalization(FFE), and a push–pull output stage, exhibiting an estimated differential output swing of 4.0V_(pp). The rms jitter of 2.0 ps is achieved at 50 Gb/s under nonreturnto-zero on–off keying(NRZ-OOK) modulation. The PICs are fabricated on a standard silicon-on-insulator platform and consist of 16 parallel silicon dual-drive Mach–Zehnder modulators on a single chip. The chip-on-board co-packaged Si transmitter is constituted by the multichannel chiplets without any off-chip bias control, which significantly simplifies the system complexity. Experimentally, the open and clear optical eye diagrams of selected channels up to 50 Gb/s OOK with extinction ratios exceeding 3 dB are obtained without any digital signal processing. The power consumption of the Si transmitter with a high integration density featuring a throughput up to 800 Gb/s is only 5.35 p J/bit, indicating a great potential for massively parallel terabit-scale optical interconnects for future hyperscale data centers and high-performance computing systems.

关键词： channel power return

Two-dimensional materials in photonic integrated circuits:recent developments and future perspectives[Invited]

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Chinese Optics Letters 2023年第11期21卷 51-75页

作者：谭华杜磊杨丰赫储蔚詹义强 Centre for Micro Nano Systems School of Information Science and Technology(SIST)Fudan UniversityShanghai 200433China Zhangjiang Laboratory Shanghai 201210China

The heterogeneous integration of photonic integrated circuits(PICs)with a diverse range of optoelectronic materials has emerged as a transformative approach,propelling photonic chips toward larger scales,superior performance,and advanced integration ***,two-dimensional(2D)materials,such as graphene,transition metal dichalcogenides(TMDCs),black phosphorus(BP),and hexagonal boron nitride(hBN),exhibit remarkable device performance and integration capabilities,offering promising potential for large-scale implementation in *** this paper,we first present a comprehensive review of recent progress,systematically categorizing the integration of photonic circuits with 2D materials based on their types while also emphasizing their unique ***,we discuss the integration approaches of 2D materials with *** also summarize the technical challenges in the heterogeneous integration of 2D materials in photonics and envision their immense potential for future applications in PICs.

关键词： two-dimensional materials silicon photonics heterogeneous integration photonic integrated circuits

In vitro immunomodulation of magnesium on monocytic cell toward anti-inflammatory macrophages

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Regenerative Biomaterials 2020年第4期7卷 391-401页

作者： Lei Sun Xiaoyu Li Menghan Xu fenghe yang Wei Wang Xufeng Niu Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education School of Biological Science and Medical EngineeringBeihang UniversityNo.37 XueYuan RoadHaidian DistrictBeijing 100083China Beijing Advanced Innovation Center for Biomedical Engineering Beihang UniversityNo.37 XueYuan RoadHaidian DistrictBeijing 100083China Department of Immunology School of Basic Medical SciencesNHC Key Laboratory of Medical ImmunologyPeking UniversityNo.38 XueYuan RoadHaidian DistrictBeijing 100191China

Biodegradable magnesium(Mg)has shown great potential advantages over current bone fixation devices and vascular scaffold technologies;however,there are few reports on the immunomodulation of corrosive Mg products,the micron-sized Mg particles(MgMPs).Human monocytic leukemia cell line THP-1 was set as the in vitro cell model to estimate the immunomodulation of MgMPs on cell proliferation,apoptosis,polarization and inflammatory *** results indicated highconcentration of Mg^2+ demoted the proliferation of the THP-1 cells and,especially,THP-1-derived macrophages,which was a potential factor that could affect cell function,but meanwhile,cell apoptosis was almost not affected by Mg^2+.In particular,the inflammation regulatory effects of MgMPs were *** exposed to Mg^2+ exhibited down-regulated expressions of M1 subtype markers and secretions of pro-inflammatory cytokines,up-regulated expression of M2 subtype marker and secretion of anti-inflammatory *** results indicated Mg^2+ could convert macrophages from M0 to M2 phenotype,and the bioeffects of MgMPs on human inflammatory cells were most likely due to the Mg^2+-induced NF-jB activation ***,our results proved Mg^2+ could be used as a new anti-inflammatory agent to suppress inflammation in clinical applications,which may provide new ideas for studying the immunomodulation of Mg-based implants on human immune system.

关键词： immunomodulation magnesium THP-1 macrophage polarization

Single-drive high-speed lumped depletion-type modulators toward 10 fJ/bit energy consumption

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Photonics Research 2017年第2期5卷 134-142页

作者： XINBAI LI fenghe yang FANG ZHONG QINGZHONG DENG JURGEN MICHEL ZHIPING ZHOU State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Engineering and Computer SciencePeking University MIT Microphotonics Center Massachusetts Institute of Technology

Reduction of modulator energy consumption to 10 fJ∕bit is essential for the sustainable development of communication *** modulators might be a viable solution if instructed by a complete theory ***,we present a complete analytical electro-optic response theory,energy consumption analysis,and eye diagrams on absolute scales for lumped *** the speed limitation is understood and alleviated by single-drive configuration,and comprehensive knowledge into the energy dependence on structural parameters significantly reduces energy *** results show that silicon modulation energy as low as 80.8 and 21.5 fJ∕bit can be achieved at 28 Gbd under 50 and 10 Ω impedance drivers,respectively.A 50 Gbd modulation is also shown to be *** analytical models can be extended to lumped modulators on other material platforms and offer a promising solution to the current challenges of modulation energy reduction.

关键词： length type high

Hybrid-integrated high-performance microwave photonic filter with switchable response

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Photonics Research 2021年第8期9卷 1569-1580页

作者： YUANSHENG TAO HAOWEN SHU XINGJUN WANG MING JIN ZIHAN TAO fenghe yang JINGBO SHI JUN QIN State Key Laboratory of Advanced Optical Communication Systems and Networks Department of ElectronicsSchool of Electronics Engineering and Computer SciencePeking UniversityBeijing 100871China Frontier Science Center for Nano-optoelectronics Peking UniversityBeijing 100871China Peking University yangtze Delta Institute of Optoelectronics Nantong 226010China Peng Cheng Laboratory Shenzhen 518055China

The integrated microwave photonic filter(MPF),as a compelling candidate for next-generation radio-frequency(RF)applications,has been widely investigated for ***,most integrated MPFs reported thus far have merely incorporated passive photonic components onto a chip-scale platform,while all necessary active devices are still bulk and *** few attempts to higher photonic integration of MPFs have been executed,the achieved filtering performances are fairly limited,which impedes the pathway to practical ***,we demonstrate,for the first time to our knowledge,an all-integrated MPF combined with high filtering performances,through hybrid integration of an In P chip-based laser and a monolithic silicon photonic circuit consisting of a dual-drive Mach–Zehnder modulator,a high-Q ring resonator,and a *** integrated MPF exhibits a high spectral resolution as narrow as 360 MHz,a wide-frequency tunable range covering the S-band to K-band(3 to 25 GHz),and a large rejection ratio of>40 d ***,the filtering response can be agilely switched between the bandpass and band-stop function with a transient respond time(48μs).Compared with previous MPFs in a similar integration level,the obtained spectral resolution in this work is dramatically improved by nearly one order of magnitude,while the valid frequency tunable range is broadened more than twice,which can satisfy the essential filtering requirements in actual RF *** a paradigm demonstration oriented to real-world scenarios,high-resolution RF filtering of realistic microwave signals aiming for interference rejection and channel selection is *** work points out a feasible route to a miniaturized,high-performance,and cost-effective MPF leveraging hybrid integration approach,thus enabling a range of RF applications from wireless communication to radar toward the higher-frequency region,more compact size,and lower power consumption.

关键词： filter modulator switched