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Navigating the Challenges of Emerging Contaminants to Protect Human and Ecological Health

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Engineering 2024年第6期37卷 1-2页

作者： Jiuhui Qu Michael R.Hoffmann Gang Yu School of Environment Tsinghua UniversityBeijing 100084China linde-robinson laboratories California Institute of TechnologyPasadenaCA 91125USA Advanced Interdisciplinary Institute of Environmental and Ecology Beijing Normal UniversityZhuhai 519000China

Emerging contaminants are defined as chemicals that are not currently(or have only recently been)regulated and about which there are concerns regarding their impact on human or ecological *** contaminants are widely detected in air,water,soil,sediment,and biotic *** is against this backdrop of urgency that we have curated this special issue titled“Emerging Contaminants Control:Science and Technology,”with the goal of uniting the latest scientific insights and pioneering strategies to address this global *** special issue embarks on a comprehensive examination of the emerging contaminants dilemma,covering aspects such as risk assessment,remediation technologies,environmental surveying,and the broader implications for *** a collection of articles,we probe deep into the core of this issue,showcasing studies that range from appraising environmental risks to forging new methods for treatment and scrutinizing the occurrence of contaminants across different environmental settings.

关键词： Ecological surveying environmental

Iron-handling solute carrier SLC22A17 as a blood-brain barrier target after stroke

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Neural Regeneration Research 2025年第11期20卷 3207-3208页

作者： Xueqi Ren Wenlu Li Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province School of Pharmaceutical SciencesZhejiang Chinese Medical UniversityHangzhouZhejiang ProvinceChina Neuroprotection Research laboratories Departments of Radiology and NeurologyMassachusetts General HospitalHarvard Medical SchoolBostonMAUSA

The pathophysiology of ischemic stroke is complex and multifactorial,involving various forms of cell death such as apoptosis,autophagy,and necrosis.A recent study suggests that oxidative and inflammatory stress can induce ferroptosis,a specialized form of cell death characterized by the accumulation of lipid peroxides dependent on intracellular iron overload(Li and Jia,2023).

关键词： death specialized barrier

应对新污染物挑战，保护人类和生态健康（英文）

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Engineering 2024年第6期 1-2页

作者：曲久辉 Michael R.Hoffmann 余刚 School of Environment Tsinghua University linde-robinson laboratories California Institute of Technology Advanced Interdisciplinary Institute of Environmental and Ecology Beijing Normal University

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Development of high damage threshold laser-machined apodizers and gain filters for laser applications

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High Power Laser Science and Engineering 2016年第3期4卷 113-119页

作者： Patrick Rambo Jens Schwarz Mark Kimmel John L.Porter Sandia National laboratories

We have developed high damage threshold filters to modify the spatial profile of a high energy laser beam. The filters are formed by laser ablation of a transmissive window. The ablation sites constitute scattering centers which can be filtered in a subsequent spatial filter. By creating the filters in dielectric materials, we see an increased laser-induced damage threshold from previous filters created using ‘metal on glass' lithography.

关键词： apodization laser beam shaping laser micro-machining spatial filtering

An efficient method for unfolding kinetic pressure driven VISAR data

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High Power Laser Science and Engineering 2015年第3期3卷 50-58页

作者： M.Hess K.Peterson A.Harvey-Thompson Sandia National laboratories

Velocity Interferometer System for Any Reflector(VISAR) [Barker and Hollenbach, J. Appl. Phys. 43, 4669(1972)]is a well-known diagnostic that is employed on many shock physics and pulsed-power experiments. With the VISAR diagnostic, the velocity on the surface of any metal flyer can be found. For most experiments employing VISAR, either a kinetic pressure [Grady, Mech. Mater. 29, 181(1998)] or a magnetic pressure [Lemke et al., Intl J. Impact Eng. 38,480(2011)] drives the motion of the flyer. Moreover, reliable prediction of the time-dependent pressure is often a critical component to understanding the physics of these experiments. Although VISAR can provide a precise measurement of a flyer's surface velocity, the real challenge of this diagnostic implementation is using this velocity to unfold the timedependent pressure. The purpose of this paper is to elucidate a new method for quickly and reliably unfolding VISAR data.

关键词： laser driven blast wave pulsed-power VISAR

Recent laser upgrades at Sandia's Z-backlighter facility in order to accommodate new requirements for magnetized liner inertial fusion on the Z-machine

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High Power Laser Science and Engineering 2016年第4期4卷 1-12页

作者： Jens Schwarz Patrick Rambo Darrell Armstrong Marius Schollmeier Ian Smith Jonathan Shores Matthias Geissel Mark Kimmel John Porter Sandia National laboratories

The Z-backlighter laser facility primarily consists of two high energy, high-power laser systems. Z-Beamlet laser(ZBL)(Rambo et al., Appl. Opt. 44, 2421(2005)) is a multi-kJ-class, nanosecond laser operating at 1054 nm which is frequency doubled to 527 nm in order to provide x-ray backlighting of high energy density events on the Z-machine. Z-Petawatt(ZPW)(Schwarz et al., J. Phys.: Conf. Ser. 112, 032020(2008)) is a petawatt-class system operating at 1054 nm delivering up to 500 J in 500 fs for backlighting and various short-pulse laser experiments(see also Figure 10 for a facility overview). With the development of the magnetized liner inertial fusion(MagLIF) concept on the Z-machine, the primary backlighting missions of ZBL and ZPW have been adjusted accordingly. As a result, we have focused our recent efforts on increasing the output energy of ZBL from 2 to 4 kJ at 527 nm by modifying the fiber front end to now include extra bandwidth(for stimulated Brillouin scattering suppression). The MagLIF concept requires a well-defined/behaved beam for interaction with the pressurized fuel. Hence we have made great efforts to implement an adaptive optics system on ZBL and have explored the use of phase plates. We are also exploring concepts to use ZPW as a backlighter for ZBL driven MagLIF experiments. Alternatively, ZPW could be used as an additional fusion fuel pre-heater or as a temporally flexible high energy pre-pulse. All of these concepts require the ability to operate the ZPW in a nanosecond long-pulse mode, in which the beam can co-propagate with ZBL. Some of the proposed modifications are complete and most of them are well on their way.

关键词： adaptive optics high energy lasers MagLIF OPCPA petawatt lasers SBS suppression

CORRUGATED CIRCULAR WAVEGUIDE WITH DUAL-DEPTH CORRUGATIONS

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Science China Mathematics 1985年第10期28卷 1098-1114页

作者：杨可忠章日荣王汉礼 Shijiazhuang Communications laboratories

The propagation equation for corrugated circular waveguides with dual-depth corrugations derived by using space harmonics technique involves as many slot modes as possible. An analysis has also made for the influence of space harmonies and slot modes on the propagation constant, the hybrid factor and the radiation characteristics. Furthermore, an investigation has been presented for the effect on the propagation and radiation properties of the slot-depth ratio and other geometric parameters. The curves and conclusions made in this paper may be helpful for designing this kind of feed.

关键词： mode HE CORRUGATED CIRCULAR WAVEGUIDE WITH DUAL-DEPTH CORRUGATIONS

DUAL-SHAPED OFFSET REFLECTOR ANTENNAS WITH CIRCULAR APERTURE FOR REALIZING LOW CROSSPOLARIZATION

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Science in China,Ser.A 1986年第6期29卷 662-672页

作者：章日荣王汉礼杨可忠 Shijiazhuang Communication laboratories

An expression of aperture field crosspolarization has been derived in this paper for dual shaped offset reflector antennas, the first-order partial differential equation has also been presented for mapping function. The problem of making a search for the mapping function can be simplified as to solve a constant differential equation in terms of an iterative process. The geometric parameters meeting the given requirements and the mapping function can be determined rapidly by making use of these equations without repeatedly solving the second-order partial differential equation or a set of the first-order differential equations and doing complicated calculations for reconstructing the main reflector.

关键词： Th DUAL-SHAPED OFFSET REFLECTOR ANTENNAS WITH CIRCULAR APERTURE FOR REALIZING LOW CROSSPOLARIZATION

ANALYSIS AND COMPUTATION OF CORRUGATED HORNS WITH VARIABLE PARAMETERS

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Science China Mathematics 1988年第8期31卷 1011-1024页

作者：刘刚章日荣王汉礼陈木华 Shijiazhuang Communication laboratories

The corrugated horns, whose parameters change continuously or in a broken-line manner, have been analyzed by a new method and their computation formulas derived from the matrix and coupled wave theories. In these formulas, the electromagnetic waves incident upon discontinuous section from its left-hand and right-hand sides have been taken into consideration. As a practical example, the mode conversion characteristics and the radiation performances of a corrugated horn with ring-load slots are computed with the formulas and the results are discussed. Comparison of theory and experiment shows good agreement.

关键词： corrugated horns antenna feeds mode conversion theory waveguide theory.