Review of Scientific Instruments最新文献_第9页

A 62 Hz high-Q 4-spiral mechanical resonator fabricated of a silicon wafer. 在硅晶片上制作的 62 Hz 高 Q 值 4 螺旋机械谐振器。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-12-01 DOI: 10.1063/5.0224255

Y Yu Klochkov, V P Mitrofanov

{"title":"A 62 Hz high-Q 4-spiral mechanical resonator fabricated of a silicon wafer.","authors":"Y Yu Klochkov, V P Mitrofanov","doi":"10.1063/5.0224255","DOIUrl":"https://doi.org/10.1063/5.0224255","url":null,"abstract":"High purity silicon is considered as the test mass material for future cryogenic gravitational-wave detectors, in particular Einstein Telescope-low frequency and LIGO Voyager [(LIGO) Laser Interferometer Gravitational-Wave Observatory]. To reduce the thermal noise of the test masses, it is necessary to study the sources of corresponding losses. Mechanical resonators with frequencies 300 Hz-6 kHz are successfully used for studying, for example, losses in optical coatings of the test mass. However, the frequency range of the interferometric gravitational-wave detectors starts at 10 Hz, and the investigation of different dissipation mechanisms for the test masses in the low-frequency region is relevant. We developed a design of a four-spiral mechanical resonator for studying dissipation and noise in the low frequency range. The resonator was fabricated of a 3-in. silicon wafer using an anisotropic wet etching technique. It consists of four spiral cantilevers on a common base, linked together with additional coupling beams for increasing the frequency difference between the resonator normal modes corresponding to the fundamental flexural off-plane mode of a single spiral cantilever. The measured Q-factor of the 62 Hz out-of-phase mode of the four-spiral silicon resonator at room temperature is limited mainly by the thermoelastic loss. At 123 K, the measured Q = (1.5 ± 0.3) × 107. The main contribution to the total loss comes from clamping and surface losses.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"95 12","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142802180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A coaxial solid state nonlinear pulse forming line with an exponentially tapered ferrite composite core.

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-12-01 DOI: 10.1063/5.0230724

Travis D Crawford, Sophia I Evers, Bradley H Sapoff, Allen L Garner

{"title":"A coaxial solid state nonlinear pulse forming line with an exponentially tapered ferrite composite core.","authors":"Travis D Crawford, Sophia I Evers, Bradley H Sapoff, Allen L Garner","doi":"10.1063/5.0230724","DOIUrl":"https://doi.org/10.1063/5.0230724","url":null,"abstract":"The need to optimize size, weight, and power of high-power microwave (HPM) systems has motivated the development of solid-state HPM sources, such as nonlinear transmission lines (NLTLs), which utilize gyromagnetic precession or dispersion to generate RF. One recent development implemented the NLTL as a pulse forming line (PFL) to form a nonlinear pulse forming line (NPFL) system that substantially reduced the system's size by eliminating the need for a separate PFL; however, matching standard loads can be challenging. This paper describes the development of a tapered NPFL using an exponentially tapered composite based ferrite core containing 60% nickel zinc ferrite (by volume) encased in polydimethylsiloxane (PDMS) and encapsulated in a 5% barium strontium titanate shell. The tapers exponentially change the line's impedance from a 50 Ω standard HN connection to 25 Ω before tapering back to 50 Ω. We characterized the core behavior by obtaining magnetization curves and ferromagnetic resonance measurements. The rise time (10%-90%) of the pulse decreased from ∼6 ns for 5 kV charging voltage to 1.8 ns for 15 kV charging voltage. Under unbiased conditions, the system generated HPM with a center frequency of ∼850 MHz with a 3 dB bandwidth of 125 MHz. Magnetic biases of 15 and 25 kA/m increased the modulation depth and decreased the center frequency to ∼500 MHz for 15 kV charging voltage.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"95 12","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142828931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design and performance of a magnetic bottle electron spectrometer for high-energy photoelectron spectroscopy.

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-12-01 DOI: 10.1063/5.0223334

Kurtis Borne, Jordan T O'Neal, Jun Wang, Erik Isele, Razib Obaid, Nora Berrah, Xinxin Cheng, Philip H Bucksbaum, Justin James, Andrei Kamalov, Kirk A Larsen, Xiang Li, Ming-Fu Lin, Yusong Liu, Agostino Marinelli, Adam M Summers, Emily Thierstein, Thomas J A Wolf, Daniel Rolles, Peter Walter, James P Cryan, Taran Driver

{"title":"Design and performance of a magnetic bottle electron spectrometer for high-energy photoelectron spectroscopy.","authors":"Kurtis Borne, Jordan T O'Neal, Jun Wang, Erik Isele, Razib Obaid, Nora Berrah, Xinxin Cheng, Philip H Bucksbaum, Justin James, Andrei Kamalov, Kirk A Larsen, Xiang Li, Ming-Fu Lin, Yusong Liu, Agostino Marinelli, Adam M Summers, Emily Thierstein, Thomas J A Wolf, Daniel Rolles, Peter Walter, James P Cryan, Taran Driver","doi":"10.1063/5.0223334","DOIUrl":"https://doi.org/10.1063/5.0223334","url":null,"abstract":"We describe the design and performance of a magnetic bottle electron spectrometer (MBES) for high-energy electron spectroscopy. Our design features a 2 m long electron drift tube and electrostatic retardation lens, achieving sub-electronvolt (eV) electron kinetic energy resolution for high energy (several hundred eV) electrons with a close to 4π collection solid angle. A segmented anode electron detector enables the simultaneous collection of photoelectron spectra in high resolution and high collection efficiency modes. This versatile instrument is installed at the time-resolved molecular and optical sciences instrument at the Linac Coherent Light Source x-ray free-electron laser (XFEL). In this paper, we demonstrate its high resolution, collection efficiency, and spatial selectivity in measurements where it is coupled to an XFEL source. These combined characteristics are designed to enable high-resolution time-resolved measurements using x-ray photoelectron, absorption, and Auger-Meitner spectroscopy. We also describe the pervasive artifact in MBES time-of-flight spectra that arises from a periodic modulation in electron collection efficiency and present a robust analysis procedure for its removal.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"95 12","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142865518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design of soft x-ray high diffraction efficiency and spectral flux Au/Ni bilayer coated laminar-type diffraction grating for objective soft x-ray flat-field spectrograph in a region of 250-550 eV.

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-12-01 DOI: 10.1063/5.0232922

M Koike, T Hatano, A S Pirozhkov, T Murano, Y Oue, S Koshiya, T Kakio, K Kondo, M Terauchi

{"title":"Design of soft x-ray high diffraction efficiency and spectral flux Au/Ni bilayer coated laminar-type diffraction grating for objective soft x-ray flat-field spectrograph in a region of 250-550 eV.","authors":"M Koike, T Hatano, A S Pirozhkov, T Murano, Y Oue, S Koshiya, T Kakio, K Kondo, M Terauchi","doi":"10.1063/5.0232922","DOIUrl":"https://doi.org/10.1063/5.0232922","url":null,"abstract":"An objective soft x-ray flat-field spectrograph employing a laminar-type bilayer coated, varied-line-spacing, spherical grating was designed to improve the detection limit and sensitivity of soft x-ray flat-field spectrographs in a region of 250-550 eV. As a design criterion, spectral flux, SF, [Hatano et al., Appl. Opt. 60, 4993-4999 (2021)], which is proportional to the amount of optical flux incident onto a detector and correlated with detection sensitivity, was used to be maximized. To enhance reflectivity with the coating design, Au/Ni bilayer coating was investigated to optimize the incidence angle and thickness of the Ni layer. This is based on the consideration that, in an energy region of over 400 eV, refractive indices of Au (bottom layer), Ni (top layer), and vacuum are increased from the bottom to the top of the layers, and a supplemental enhancement of reflectivity can be expected by optimizing the thickness of the top layer. Thus, the thickness of Ni and the incidence angle were chosen to be 8.0 nm and 86.00°, respectively. To maintain dispersion and spectral resolution of the grating used at an incidence angle of 87.07° as previously designed, groove density was increased to 1500 lines/mm from 1200 lines/mm of our previous design. Finally, a holographic, varied-line-spacing, spherical grating was designed assuming an aspherical-wavefront-recording configuration. The numerical simulation results showed that the spectrograph employing newly designed grating with laminar-type grooves and Au/Ni bilayer coating exhibited 2-18 times higher spectral flux as well as an improved spectral resolution compared with those obtained with the previously designed gratings and spectrographs.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"95 12","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142882775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Commissioning and first result of undulator based atomic, molecular, and optical sciences (AMOS) beamline at Indus-2 synchrotron radiation source.

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-12-01 DOI: 10.1063/5.0238362

Param Jeet Singh, Tamaghna Maitra, A K Das, A K Yadav, Ravi Kumar, Ankur Agarwal, Ashutosh Dvivedi, K K Gorai, A Shastri, D Bhattacharyya, D V Udupa

{"title":"Commissioning and first result of undulator based atomic, molecular, and optical sciences (AMOS) beamline at Indus-2 synchrotron radiation source.","authors":"Param Jeet Singh, Tamaghna Maitra, A K Das, A K Yadav, Ravi Kumar, Ankur Agarwal, Ashutosh Dvivedi, K K Gorai, A Shastri, D Bhattacharyya, D V Udupa","doi":"10.1063/5.0238362","DOIUrl":"https://doi.org/10.1063/5.0238362","url":null,"abstract":"We present a comprehensive overview of the commissioning process and initial results of a synchrotron beamline dedicated to atomic, molecular, and optical sciences at the BL-5 undulator port of the Indus-2 synchrotron facility, Raja Ramanna Center for Advanced Technology, Indore, India. The beamline delivers a photon flux of ∼1012 photons/s with high resolving power (∼10 000) over an energy range of 6-800 eV, making it suitable for high-resolution spectroscopy in atomic, molecular, and optical science. The energy tunability from vacuum ultraviolet to soft x-ray (6-800 eV) is achieved through a varied line spacing plane grating monochromator with four gratings: very low energy (VLEG), low energy (LEG), medium energy (MEG), and high energy (HEG). These gratings cover ranges of 6-18, 15-45, 42-126, and 90-800 eV, respectively. A differential pumping system allows windowless transmission of VUV and soft x-ray photons for gas-phase spectroscopic experiments. The beamline also includes an x-ray absorption spectroscopy (XAS) station for solid samples. To demonstrate efficiency, a spectrum was recorded using all four gratings in the 6-300 eV energy range. Standard spectra of Xe and O2 verified the resolution, achieving a resolving power of 7740 with the VLEG, consistent with design specifications. XAS spectra of Cu M, C, and O K-edges were also obtained using MEG and HEG. Details on vacuum level, grating operation, and the first commissioning experiments are presented.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"95 12","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142897259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comprehensive modeling of a deflector jet pressure servo valve and analysis of key influences on the front stage.

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-12-01 DOI: 10.1063/5.0225071

Na Liang, Zhaohui Yuan, Ruosong Jiang, Jian Kang, Jianrui Zhang

{"title":"Comprehensive modeling of a deflector jet pressure servo valve and analysis of key influences on the front stage.","authors":"Na Liang, Zhaohui Yuan, Ruosong Jiang, Jian Kang, Jianrui Zhang","doi":"10.1063/5.0225071","DOIUrl":"https://doi.org/10.1063/5.0225071","url":null,"abstract":"The deflector jet pressure servo valve (DJPSV), a critical component of the aircraft brake servo system, requires a precise foundational model for performance analysis, optimization, and enhancement. However, the complexity of the jet process within the V-groove of the deflector plate presents challenges for accurate mathematical modeling. To address this issue, the paper takes the DJPSV as the research object, carries out detailed mathematical modeling of its components, analyzes the influencing factors of the performance of the key component-the front stage-and optimizes the design of the key factors. First, integrating FLUENT velocity field analysis, this study proposes a novel perspective to rationally simplify and parametrically model the injection process in 3D space. Subsequently, a systematic deduction of the mathematical model for DJPSV is undertaken. Employing the AMESim platform and the secondary development module AMESet, a comprehensive simulation model is constructed, facilitating the study of static-dynamic valve characteristics. Additionally, utilizing the Morris theory and an intelligent algorithm, sensitivity analysis, and structural optimization on the critical component, the pre-stage. The results reveal that the width of the receiving diverter wedge (M), the width of the V-groove outlet (b1), and the distance from the V-groove outlet to the receiving diverter wedge (h) exert the most significant influence on the differential pressure of the pre-stage, which are the key parameters affecting the output differential pressure of the pre-stage. The experiment verifies the accuracy of the simulation model, offering a vital theoretical foundation for valve development and related areas.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"95 12","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142897261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of a fast gate driver based on a half-turn planar transformer.

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-12-01 DOI: 10.1063/5.0214911

Diangeng Li, Zicheng Zhang, Jingming Gao, Lei Wang, Yijie Sun, Juntao He

引用次数: 0

Laser-driven betatron x rays for high-throughput imaging of additively manufactured materials.

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-12-01 DOI: 10.1063/5.0221606

V Senthilkumaran, N F Beier, S Fourmaux, P Shabaninezhad, J Stinehart, L Zhou, J A Moore, A E Hussein

{"title":"Laser-driven betatron x rays for high-throughput imaging of additively manufactured materials.","authors":"V Senthilkumaran, N F Beier, S Fourmaux, P Shabaninezhad, J Stinehart, L Zhou, J A Moore, A E Hussein","doi":"10.1063/5.0221606","DOIUrl":"https://doi.org/10.1063/5.0221606","url":null,"abstract":"Betatron x rays from a laser wakefield accelerator provide a new avenue for high-resolution, high-throughput radiography of solid materials. Here, we demonstrate the optimization of betatron x rays for three-dimensional tomography of defects in additively manufactured (AM) alloys at a repetition rate of 2.5 Hz. Using the Advanced Laser Light Source in Varennes, Qc, we characterized the x-ray energy spectrum, spatial resolution, beam stability, and emission length from three different gas targets {He, N2, and He-N2 [He (99.5%) + N2 (0.5%)] mixture} to determine the conditions for optimized imaging resolution with minimized acquisition time. Mixed He-N2 produced the highest x-ray critical energy (19 ± 5) keV and average brightness (∼3.3×1010 photons/s/mm2/mrad2/0.1% BW) vs pure N2 gas (12 ± 4 keV and ∼1.6×1010 photons/s/mm2/mrad2/0.1% BW). The mixed gas demonstrated the best beam stability and pointing compared to pure He gas. The optimization of betatron sources at 2.5 Hz for high-resolution imaging of micrometer-scale defects in AM alloys will enable high-throughput data collection, accelerating the characterization of complex mechanical deformation processes in these materials.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"95 12","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142807590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Machine learning-driven image synthesis and analysis applications for inertial confinement fusion (invited). 惯性约束融合的机器学习驱动图像合成和分析应用（特邀）。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-12-01 DOI: 10.1063/5.0219412

Bradley T Wolfe, Pinghan Chu, Nga T T Nguyen-Fotiadis, Xinhua Zhang, Mariana Alvarado Alvarez, Zhehui Wang

{"title":"Machine learning-driven image synthesis and analysis applications for inertial confinement fusion (invited).","authors":"Bradley T Wolfe, Pinghan Chu, Nga T T Nguyen-Fotiadis, Xinhua Zhang, Mariana Alvarado Alvarez, Zhehui Wang","doi":"10.1063/5.0219412","DOIUrl":"https://doi.org/10.1063/5.0219412","url":null,"abstract":"Recent fusion breakeven [Abu-Shawareb et al., Phys. Rev. Lett. 132, 065102 (2024)] in the National Ignition Facility (NIF) motivates an integrated approach to data analysis from multiple diagnostics. Deep neural networks provide a seamless framework for multi-modal data fusion, automated data analysis, optimization, and uncertainty quantification [Wang et al., arXiv:2401.08390 (2024)]. Here, we summarize different neural network methods for x-ray and neutron imaging data from NIF. To compensate for the small experimental datasets, both model based physics-informed synthetic data generation and deep neural network methods, such as generative adversarial networks, have been successfully implemented to allow a variety of automated workflows in x-ray and neutron image processing. We highlight results in noise emulation, contour analysis for low-mode analysis and asymmetry, denoising, and super-resolution. Further advances in the integrated multi-modal imaging, in sync with experimental validation and uncertainty quantification, will help with the ongoing experimental optimization in NIF, as well as the maturation of alternate inertial confinement fusion (ICF) platforms such as double-shells.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"95 12","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142839138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Platform development toward ultra-intense laser-based simultaneous hard x-ray and MeV neutron multimodal radiography.

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-12-01 DOI: 10.1063/5.0219342

F Treffert, M Aufderheide, J Bendahan, M P Hill, T Ma, D R Rusby, M P Selwood, G J Williams

{"title":"Platform development toward ultra-intense laser-based simultaneous hard x-ray and MeV neutron multimodal radiography.","authors":"F Treffert, M Aufderheide, J Bendahan, M P Hill, T Ma, D R Rusby, M P Selwood, G J Williams","doi":"10.1063/5.0219342","DOIUrl":"https://doi.org/10.1063/5.0219342","url":null,"abstract":"Ultra-intense short-pulse lasers interacting with matter are capable of generating exceptionally bright secondary radiation sources. The short pulse duration (picoseconds to nanoseconds), small source size (sub-mm), and comparable high peak flux to conventional single particle sources make them an attractive source for radiography using a combination of particle species, known as multimodal imaging. Simultaneous x-ray and MeV neutron imaging of multi-material objects can yield unique advantages for material segmentation and identification within the full sample. Here, we present a concept for simultaneous single line-of-sight multimodal imaging using laser-driven simultaneous MeV neutrons and x rays. Radiography is performed using two simple optically coupled scintillators. Different shielding thicknesses are explored to demonstrate contrasting images that enable multi-material segmentation. Synthetic combined x-ray and neutron radiographs demonstrate the ability to resolve both the high-Z and low-Z material features within a test object for realistic x-ray and neutron spectra and flux ratios at existing and near-term laser facilities.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"95 12","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142882784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0