Microwave and Optical Technology Letters最新文献

{"title":"Quad-Band Bandpass Filter Using Asymmetric Short Stub Loaded E-Type Resonators","authors":"Meng Liu,&nbsp;Lei Chen,&nbsp;Jin Yi Liu,&nbsp;Tian Tian Zhang","doi":"10.1002/mop.70334","DOIUrl":"https://doi.org/10.1002/mop.70334","url":null,"abstract":"<div>\u0000 \u0000 <p>In this study, a quad-band bandpass filter (BPF) with high selectivity and independently controllable passbands is proposed. The proposed BPF is achieved by employing two pairs of asymmetric short stub loaded E-type resonators. Each pair of E-type resonators achieves a dual-frequency filtering characteristic. One pair of E-type resonators operates at 1.57 and 3.0 GHz, and the other pair operates at 2.4 and 3.5 GHz, respectively. The three lines parallel coupling (TLPC) structure is employed between the source and load to generate eight transmission zeros (TZs), which greatly improves the selectivity of the filter. To verify the feasibility of the proposed model, a prototype was designed and fabricated, whose simulations and measurements are in good agreement.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"67 8","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144832741","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}

{"title":"Design of Broadband High-Efficiency Power Amplifier Based on Low-Pass Filter Network","authors":"Bingxin Li,&nbsp;Minshi Jia,&nbsp;Zhiqun Cheng,&nbsp;Baoquan Zhong,&nbsp;Zheming Zhu,&nbsp;Zhenghao Yang,&nbsp;Kun Wang","doi":"10.1002/mop.70335","DOIUrl":"https://doi.org/10.1002/mop.70335","url":null,"abstract":"<div>\u0000 \u0000 <p>This letter proposes an improved power amplifier (PA) design method based on a filter network. A high-order Butterworth low-pass filter is used as a prototype of the output matching network of the PA, and the proposed matching method reorganizes the matching network to take in transistor parasitic and packaging parameters. In this method, the high-order filter with large circuit area is converted into a compact microstrip matching network containing transistor package and parasitic parameters, and the circuit size is reduced. The Butterworth filter has good frequency selectivity and stability in the wideband range, the reconfigured microstrip matching network takes the transistor packaging and parasitic parameters into account, which provides theoretical support for the design of wideband high-efficiency PAs. To verify the proposed method, a wideband PA module is designed and fabricated with a 10-W gallium nitride (GaN) high electron mobility transistor (HEMT) device. Measurement results show that, over the frequency band between 2.1 GHz and 3.4 GHz, 9.5–11.8 dB gain, a drain efficiency (DE) of 61.7%–75.7%, and 39.5–41.5 dBm output power have been achieved.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"67 8","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144832742","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}

{"title":"Measurement and Analysis of Reflection Attenuation of Change Signals Traversing Concrete Barriers Within the 400–1400 MHz Range","authors":"Şevket Demirci,&nbsp;Hakan Işıker,&nbsp;Betül Yılmaz,&nbsp;Caner Özdemir","doi":"10.1002/mop.70353","DOIUrl":"https://doi.org/10.1002/mop.70353","url":null,"abstract":"<div>\u0000 \u0000 <p>The electromagnetic wave attenuation characteristics of two common construction materials, specifically C30/37 concrete and aerated-concrete, namely C30/37 concrete and aerated concrete, have been investigated due to their importance in rubble-penetrating radar-based life-sign detection. This paper presents the results from radar experiments using free-space vector network analyzer measurements within the <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 \u0000 <mrow>\u0000 <mn>400</mn>\u0000 \u0000 <mo>−</mo>\u0000 \u0000 <mn>1400</mn>\u0000 </mrow>\u0000 </mrow>\u0000 <annotation> ${bf{400}}-{bf{1400}}$</annotation>\u0000 </semantics></math> MHz frequency range, aimed at monitoring periodic arm movements behind wall blockages made of these materials. To ensure data validity, tests were carried out with two different antenna types: the Vivaldi tapered slot antenna and the double-ridged horn antenna. The reflection data collected at a fixed sensor position were processed by eliminating the static background and averaging the results. The received power levels and frequency variations of the resultant change data were evaluated and compared in relation to the electromagnetic absorption characteristics of the examined concrete samples.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"67 8","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144832737","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}

{"title":"Highly-Selective C-Band Rectangular SIW-Based Bandpass Absorptive Filter","authors":"Amir Hossein Mehramiz,&nbsp;Morteza Rezaee,&nbsp;Ali Mehrdadian,&nbsp;Keyhan Hosseini","doi":"10.1002/mop.70359","DOIUrl":"https://doi.org/10.1002/mop.70359","url":null,"abstract":"<div>\u0000 \u0000 <p>A high-selectivity second-order bandpass absorptive filter is designed based on the rectangular substrate-integrated waveguide (SIW) technology. The proposed C-band filter is inspired by the complementary duplexer architecture and is designed at the central frequency of 5.8 GHz. The absorptive filter consists of a T-junction, and reflective bandpass and bandstop filters. The T-junction is exploited to divide the input path into two main and auxiliary channels to mimic the complementary duplexer architecture. The bandpass filter guides the signal within the passband spectrum of the filter to the output. Furthermore, the bandstop filter, with a carefully designed matching section, guides the wave reflected in the stopband of the bandpass filter to be dissipated in a matched load. The filter substrate is RO4003c with a dielectric constant of 3.55 and a thickness of 0.813 mm. The simulation and measurement results show that the 10-dB fractional absorption bandwidth is 14%, the passband insertion loss is 1.39 dB, and the return loss at 5.8 GHz is more than 30 dB. In addition, the 3-dB passband bandwidth is 3.6%, which denotes the superiority of the proposed absorptive filter in terms of selectivity compared to the similar reported results, while maintaining an acceptable insertion loss. The filter design is simple and systematic, and thus it is straightforward to increase its order and selectivity without increasing the number of resistors.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"67 8","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144832739","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}

{"title":"A Compact Broadband Circularly Polarized Metasurface Antenna","authors":"Liping Han,&nbsp;Xiaofang Chen,&nbsp;Guorui Han,&nbsp;Yufeng Liu,&nbsp;Yajuan Zhao,&nbsp;Wenmei Zhang,&nbsp;Member, IEEE","doi":"10.1002/mop.70347","DOIUrl":"https://doi.org/10.1002/mop.70347","url":null,"abstract":"<div>\u0000 \u0000 <p>This letter demonstrates a design method of wide circularly polarized (CP) antennas by combining two separated characteristic modes of metasurface and the resonant mode of the feeding structure. The modal bandwidth of the metasurface is extended through separating a pair of degenerate modes of a metasurface, and two separated characteristic modes are selected as the candidate modes. A slot-coupled feeding structure with a 90° phase difference is employed to excite the metasurface, and then a wider axial ratio bandwidth (ARBW) can be attained by assembling the resonant modes of the metasurface and the feeding structure. The dimension of the proposed antenna is 0.93<i>λ</i>₀ × 0.93<i>λ</i>₀ × 0.067<i>λ</i>₀. The measurements indicate that the antenna achieves a −10-dB impedance bandwidth of 3.98–6.36 GHz (46%), a 3-dB ARBW of 4.3–6.3 GHz (37.7%), and a maximum realized gain of 6.24 dBi.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"67 8","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144832736","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}

{"title":"Noncontact Young's Modulus Measurement Using a Laser Interferometry–Digital Microscopy System: From Manganese Steel to Polylactic Acid Composites","authors":"Chunyan Sun,&nbsp;Bowen Zhang,&nbsp;Zhipeng Wang,&nbsp;Yunxuan Zou,&nbsp;Yuanchun Ma,&nbsp;Jin Bai","doi":"10.1002/mop.70356","DOIUrl":"https://doi.org/10.1002/mop.70356","url":null,"abstract":"<div>\u0000 \u0000 <p>High-precision measurement of Young's modulus is essential for evaluating the mechanical properties of materials, yet traditional methods often exhibit high error rates and system complexity. This study presents a noncontact, fully digital sensor system that integrates Lloyd's mirror interferometry with digital microscopy imaging. The system employs a uniaxial stretching device and a Lloyd's mirror optical path to capture real-time interference fringe images, and utilizes a multi-algorithm fusion framework for accurate fringe centerline positioning. A MATLAB-based GUI enables one-click automated data processing. Experimental results show that the system measures the Young's modulus of manganese steel wire as 2.004 × 100 GPa with a relative uncertainty of 1.36%, outperforming CCD-based methods (relative error &gt; 4%). The Young's modulus measurements for pure aluminum wire, polylactic acid (PLA) composites, and aluminum alloy sheets are 0.776 × 100 GPa (relative uncertainty 2.63%), 3.016 × 100 GPa (relative uncertainty 1.19%), and 0.729 × 100 GPa (relative uncertainty 4.21%), respectively. Overall, the proposed system is a promising solution with broad engineering applicability for high-precision elastic property measurements under complex conditions owing to its applicability to both metallic and non-metallic materials.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"67 8","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144832738","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}

{"title":"CMA-Driven Polarization Purity Enhancement in Triangular Patch Antennas With Resonance Stability","authors":"Susamay Samanta,&nbsp;P Soni Reddy,&nbsp;Kaushik Mandal","doi":"10.1002/mop.70351","DOIUrl":"https://doi.org/10.1002/mop.70351","url":null,"abstract":"<div>\u0000 \u0000 <p>This letter presents an innovative strategy to improve polarization purity in space-constrained microstrip patch antennas using a low-profile metal-pin-based superstructure. The triangular patch, an inherently compact antenna shape, suffers from high cross-polarized field components, an issue that has been largely overlooked. Using characteristic mode analysis (CMA), the near-field E-field distribution of the <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 \u0000 <mrow>\u0000 <mi>T</mi>\u0000 \u0000 <msub>\u0000 <mi>M</mi>\u0000 \u0000 <mn>10</mn>\u0000 </msub>\u0000 </mrow>\u0000 </mrow>\u0000 <annotation> $T{M}_{10}$</annotation>\u0000 </semantics></math> mode reveals that the <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 \u0000 <mrow>\u0000 <msub>\u0000 <mi>E</mi>\u0000 \u0000 <mi>x</mi>\u0000 </msub>\u0000 </mrow>\u0000 </mrow>\u0000 <annotation> ${E}_{x}$</annotation>\u0000 </semantics></math> and <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 \u0000 <mrow>\u0000 <msub>\u0000 <mi>E</mi>\u0000 \u0000 <mi>y</mi>\u0000 </msub>\u0000 </mrow>\u0000 </mrow>\u0000 <annotation> ${E}_{y}$</annotation>\u0000 </semantics></math> components overlap near the apex, leading to increased cross-polarization (XP). While latest minimally invasive method using partially shorting pins causes a 2.2% upward frequency shift, this noninvasive approach results in a 0.3% downward frequency shift, maintaining compactness and scalability. Experimental results demonstrate normalized peak XP levels of −38 dB in the E-plane, −28 dB in the H-plane, and −18 dB in the diagonal plane, with a peak gain of 7.2 dBi, confirming the effectiveness of the design.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"67 8","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144832740","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}

{"title":"Real-Time Monitoring System for Stator and Rotor Temperature of Hydroelectric Generator Based on Fluorescent Optical Fiber Sensing","authors":"Shuo Yang,&nbsp;Shuo Yang,&nbsp;Junhu Qiu,&nbsp;Xiwang Sun,&nbsp;Zhaoyan Zhang,&nbsp;Cunguang Lou,&nbsp;Zhaopeng Li","doi":"10.1002/mop.70357","DOIUrl":"https://doi.org/10.1002/mop.70357","url":null,"abstract":"<div>\u0000 \u0000 <p>Overheating of the stator and rotor in hydroelectric generators poses significant safety risks. Conventional temperature monitoring methods are unable to directly measure temperature and can be compromised by electromagnetic interference in dynamic environments, reducing measurement accuracy. To address these challenges, this paper introduces a fluorescence-lifetime-based optical fiber sensing system for distributed temperature monitoring of stator and rotor components under power generation conditions. The system simultaneously measures both components, exhibits strong electromagnetic interference resistance, and supports real-time temperature visualization via a customized custom graphical user interface (GUI) platform for data storage and analysis. Installed in a hydropower station in Sichuan province, during summer operation, the system successfully collected real-time stator and rotor temperature data at rotational speeds of 500 rpm, achieving measurement accuracy of ±0.3°C. This approach demonstrates significant potential for industrial deployment in advanced condition monitoring of hydroelectric generator.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"67 8","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144814648","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}

{"title":"High-Q High-Isolation Resistor-Less Filtering Power Dividing SIW-Cavity for High-Power Applications","authors":"Kareem H. El-Gendy,&nbsp;Mohamed F. Hagag,&nbsp;Mahmoud A. Abdalla","doi":"10.1002/mop.70343","DOIUrl":"https://doi.org/10.1002/mop.70343","url":null,"abstract":"&lt;div&gt;\u0000 \u0000 &lt;p&gt;A high-power resistor-less filtering power divider is proposed in this paper. It consists of a substrate-integrated-waveguide (SIW) cavity resonator, with two centered posts in it. Two high unloaded quality factor (&lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 \u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;Q&lt;/mi&gt;\u0000 \u0000 &lt;mi&gt;u&lt;/mi&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt; ${Q}_{u}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;) evanescent-modes, mode 1 and mode 2, are excited at different resonant frequencies. The posts are loaded with two capacitive loads, (&lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 \u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;C&lt;/mi&gt;\u0000 \u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;r&lt;/mi&gt;\u0000 \u0000 &lt;mi&gt;e&lt;/mi&gt;\u0000 \u0000 &lt;mi&gt;s&lt;/mi&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt; ${C}_{res}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;) and (&lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 \u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;C&lt;/mi&gt;\u0000 \u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;s&lt;/mi&gt;\u0000 \u0000 &lt;mi&gt;h&lt;/mi&gt;\u0000 \u0000 &lt;mi&gt;i&lt;/mi&gt;\u0000 \u0000 &lt;mi&gt;f&lt;/mi&gt;\u0000 \u0000 &lt;mi&gt;t&lt;/mi&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt; ${C}_{shift}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;), embedded in the structure. Controlling these capacitances, the resonant frequency of the proposed power divider is tuned. Moreover, the resonant frequency of mode 2 is shifted to its equivalent of mode 1, obtaining an isolation between the output ports. The proposed power divider is designed to operate at 4.5 GHz. A good agreement is obtained between the simulated and the measured results. The proposed SIW-cavity has a size of (&lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 \u0000 &lt;mrow&gt;\u0000 &lt;mn&gt;0.55&lt;/mn&gt;\u0000 \u0000 &lt;msub&gt;\u0000 &lt;mi&gt;λ&lt;/mi&gt;\u0000 \u0000 &lt;mi&gt;g&lt;/mi&gt;\u0000 &lt;/msub&gt;\u0000 \u0000 &lt;mo&gt;×&lt;/mo&gt;\u0000 \u0000 &lt;mn&gt;0.55&lt;/mn&gt;\u0000 \u0000 ","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"67 8","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144814701","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}

{"title":"Circularly Polarized Implantable Antenna in Hemisphere Cap for Deeply Embedded Blood Glucose Monitoring Applications","authors":"Li-Jie Xu,&nbsp;Zhibo Zhou,&nbsp;Mingyu Liang,&nbsp;Mengyao Huang,&nbsp;Qiang Liu","doi":"10.1002/mop.70338","DOIUrl":"https://doi.org/10.1002/mop.70338","url":null,"abstract":"<div>\u0000 \u0000 <p>In this paper, a novel design of a conformal circularly polarized (CP) antenna tailored for blood glucose monitoring within the 2.45 GHz ISM (Industrial, Scientific, and Medical) frequency band is presented, with particular emphasis on scenarios involving deep implantation. The antenna is integrated with the exterior surface of a 3D-printed hemispherical cap, configuring a conformal helical antenna structure. An extension line incorporated at the helix's base facilitates the attainment of an impressively broad and stable CP bandwidth of 46.75%. Measurements conclusively affirm the performance metrics of the proposed antenna, underscoring its potential for reliable communication in challenging biomedical implant contexts.</p>\u0000 </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"67 8","pages":""},"PeriodicalIF":1.2,"publicationDate":"2025-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144814647","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}