Search results for: Junfeng Li

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class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="Junfeng Li"> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 6</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: Junfeng Li</h1> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6</span> An Electrically Modulatable Silicon Waveguide Grating Using an Implantation Technology</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=Qing%20Fang">Qing Fang</a>, <a href="https://publications.waset.org/search?q=Lianxi%20Jia"> Lianxi Jia</a>, <a href="https://publications.waset.org/search?q=JunFeng%20Song"> JunFeng Song</a>, <a href="https://publications.waset.org/search?q=Xiaoguang%20Tu"> Xiaoguang Tu</a>, <a href="https://publications.waset.org/search?q=Mingbin%20Yu"> Mingbin Yu</a>, <a href="https://publications.waset.org/search?q=Andy%20Eu-jin%20Lim"> Andy Eu-jin Lim</a>, <a href="https://publications.waset.org/search?q=Guo%20Qiang%20Lo"> Guo Qiang Lo</a> </p> <p class="card-text"><strong>Abstract:</strong></p> <p>The first pn-type carrier-induced silicon Bragg-grating filter is demonstrated. The extinction-ratio modulations are 11.5 dB and 10 dB with reverse and forward biases, respectively. 8-Gpbs data rate is achieved with a reverse bias.</p> <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=Silicon%20photonics" title="Silicon photonics">Silicon photonics</a>, <a href="https://publications.waset.org/search?q=Waveguide%20grating" title=" Waveguide grating"> Waveguide grating</a>, <a href="https://publications.waset.org/search?q=Carrier-induced" title=" Carrier-induced"> Carrier-induced</a>, <a href="https://publications.waset.org/search?q=Extinction-ratio%20modulation." title=" Extinction-ratio modulation. "> Extinction-ratio modulation. </a> </p> <a href="https://publications.waset.org/10003843/an-electrically-modulatable-silicon-waveguide-grating-using-an-implantation-technology" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/10003843/apa" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">APA</a> <a href="https://publications.waset.org/10003843/bibtex" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">BibTeX</a> <a href="https://publications.waset.org/10003843/chicago" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Chicago</a> <a href="https://publications.waset.org/10003843/endnote" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">EndNote</a> <a href="https://publications.waset.org/10003843/harvard" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Harvard</a> <a href="https://publications.waset.org/10003843/json" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">JSON</a> <a href="https://publications.waset.org/10003843/mla" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">MLA</a> <a href="https://publications.waset.org/10003843/ris" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">RIS</a> <a href="https://publications.waset.org/10003843/xml" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">XML</a> <a href="https://publications.waset.org/10003843/iso690" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">ISO 690</a> <a href="https://publications.waset.org/10003843.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">1707</span> </span> </div> </div> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5</span> A High-Crosstalk Silicon Photonic Arrayed Waveguide Grating </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=Qing%20Fang">Qing Fang</a>, <a href="https://publications.waset.org/search?q=Lianxi%20Jia"> Lianxi Jia</a>, <a href="https://publications.waset.org/search?q=Junfeng%20Song"> Junfeng Song</a>, <a href="https://publications.waset.org/search?q=Chao%20Li"> Chao Li</a>, <a href="https://publications.waset.org/search?q=Xianshu%20Luo"> Xianshu Luo</a>, <a href="https://publications.waset.org/search?q=Mingbin%20Yu"> Mingbin Yu</a>, <a href="https://publications.waset.org/search?q=Guoqiang%20Lo"> Guoqiang Lo</a> </p> <p class="card-text"><strong>Abstract:</strong></p> <p>In this paper, we demonstrated a 1 × 4 silicon photonic cascaded arrayed waveguide grating, which is fabricated on a SOI wafer with a 220 nm top Si layer and a 2µm buried oxide layer. The measured on-chip transmission loss of this cascaded arrayed waveguide grating is ~ 5.6 dB, including the fiber-to-waveguide coupling loss. The adjacent crosstalk is 33.2 dB. Compared to the normal single silicon photonic arrayed waveguide grating with a crosstalk of ~ 12.5 dB, the crosstalk of this device has been dramatically increased.</p> <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=Silicon%20photonic" title="Silicon photonic">Silicon photonic</a>, <a href="https://publications.waset.org/search?q=arrayed%20waveguide%20grating" title=" arrayed waveguide grating"> arrayed waveguide grating</a>, <a href="https://publications.waset.org/search?q=high-crosstalk" title=" high-crosstalk"> high-crosstalk</a>, <a href="https://publications.waset.org/search?q=cascaded%20structure." title=" cascaded structure."> cascaded structure.</a> </p> <a href="https://publications.waset.org/10003784/a-high-crosstalk-silicon-photonic-arrayed-waveguide-grating" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/10003784/apa" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">APA</a> <a href="https://publications.waset.org/10003784/bibtex" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">BibTeX</a> <a href="https://publications.waset.org/10003784/chicago" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Chicago</a> <a href="https://publications.waset.org/10003784/endnote" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">EndNote</a> <a href="https://publications.waset.org/10003784/harvard" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Harvard</a> <a href="https://publications.waset.org/10003784/json" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">JSON</a> <a href="https://publications.waset.org/10003784/mla" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">MLA</a> <a href="https://publications.waset.org/10003784/ris" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">RIS</a> <a href="https://publications.waset.org/10003784/xml" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">XML</a> <a href="https://publications.waset.org/10003784/iso690" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">ISO 690</a> <a href="https://publications.waset.org/10003784.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">1808</span> </span> </div> </div> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4</span> Design and Development of Automatic Leveling and Equalizing Hoist Device for Spacecraft</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=Fu%20Hao">Fu Hao</a>, <a href="https://publications.waset.org/search?q=Sun%20Gang"> Sun Gang</a>, <a href="https://publications.waset.org/search?q=Tang%20Laiying"> Tang Laiying</a>, <a href="https://publications.waset.org/search?q=Cui%20Junfeng"> Cui Junfeng</a> </p> <p class="card-text"><strong>Abstract:</strong></p> To solve the quick and accurate level-adjusting problem in the process of spacecraft precise mating, automatic leveling and equalizing hoist device for spacecraft is developed. Based on lifting point adjustment by utilizing XY-workbench, the leveling and equalizing controller by a self-adaptive control algorithm is proposed. By simulation analysis and lifting test using engineering prototype, validity and reliability of the hoist device is verified, which can meet the precision mating requirements of practical applications for spacecraft. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=automatic%20leveling%20and%20equalizing" title="automatic leveling and equalizing">automatic leveling and equalizing</a>, <a href="https://publications.waset.org/search?q=hoist%20device" title=" hoist device"> hoist device</a>, <a href="https://publications.waset.org/search?q=lifting%20point%20adjustment" title=" lifting point adjustment"> lifting point adjustment</a>, <a href="https://publications.waset.org/search?q=self-adaptive%20control" title=" self-adaptive control"> self-adaptive control</a> </p> <a href="https://publications.waset.org/2082/design-and-development-of-automatic-leveling-and-equalizing-hoist-device-for-spacecraft" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/2082/apa" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">APA</a> <a href="https://publications.waset.org/2082/bibtex" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">BibTeX</a> <a href="https://publications.waset.org/2082/chicago" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Chicago</a> <a href="https://publications.waset.org/2082/endnote" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">EndNote</a> <a href="https://publications.waset.org/2082/harvard" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Harvard</a> <a href="https://publications.waset.org/2082/json" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">JSON</a> <a href="https://publications.waset.org/2082/mla" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">MLA</a> <a href="https://publications.waset.org/2082/ris" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">RIS</a> <a href="https://publications.waset.org/2082/xml" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">XML</a> <a href="https://publications.waset.org/2082/iso690" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">ISO 690</a> <a href="https://publications.waset.org/2082.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">2020</span> </span> </div> </div> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3</span> Silicon-based Low-Power Reconfigurable Optical Add-Drop Multiplexer (ROADM)</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=Junfeng%20Song">Junfeng Song</a>, <a href="https://publications.waset.org/search?q=Xianshu%20Luo"> Xianshu Luo</a>, <a href="https://publications.waset.org/search?q=Qing%20Fang"> Qing Fang</a>, <a href="https://publications.waset.org/search?q=Lianxi%20Jia"> Lianxi Jia</a>, <a href="https://publications.waset.org/search?q=Xiaoguang%20Tu"> Xiaoguang Tu</a>, <a href="https://publications.waset.org/search?q=Tsung-Yang%20Liow">Tsung-Yang Liow</a>, <a href="https://publications.waset.org/search?q=Mingbin%20Yu"> Mingbin Yu</a>, <a href="https://publications.waset.org/search?q=Guo-Qiang%20Lo"> Guo-Qiang Lo</a> </p> <p class="card-text"><strong>Abstract:</strong></p> We demonstrate a 1脳4 coarse wavelength division-multiplexing (CWDM) planar concave grating multiplexer/demultiplexer and its application in re-configurable optical add/drop multiplexer (ROADM) system in silicon-on-insulator substrate. The wavelengths of the demonstrated concave grating multiplexer align well with the ITU-T standard. We demonstrate a prototype of ROADM comprising two such concave gratings and four wide-band thermo-optical MZI switches. Undercut technology which removes the underneath silicon substrate is adopted in optical switches in order to minimize the operation power. For all the thermal heaters, the operation voltage is smaller than 1.5 V, and the switch power is ~2.4 mW. High throughput pseudorandom binary sequence (PRBS) data transmission with up to 100 Gb/s is demonstrated, showing the high-performance ROADM functionality. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=ROADM" title="ROADM">ROADM</a>, <a href="https://publications.waset.org/search?q=Optical%20switch" title=" Optical switch"> Optical switch</a>, <a href="https://publications.waset.org/search?q=low%20power%20consumption" title=" low power consumption"> low power consumption</a>, <a href="https://publications.waset.org/search?q=Integrated%20devices." title=" Integrated devices."> Integrated devices.</a> </p> <a href="https://publications.waset.org/292/silicon-based-low-power-reconfigurable-optical-add-drop-multiplexer-roadm" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/292/apa" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">APA</a> <a href="https://publications.waset.org/292/bibtex" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">BibTeX</a> <a href="https://publications.waset.org/292/chicago" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Chicago</a> <a href="https://publications.waset.org/292/endnote" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">EndNote</a> <a href="https://publications.waset.org/292/harvard" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Harvard</a> <a href="https://publications.waset.org/292/json" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">JSON</a> <a href="https://publications.waset.org/292/mla" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">MLA</a> <a href="https://publications.waset.org/292/ris" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">RIS</a> <a href="https://publications.waset.org/292/xml" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">XML</a> <a href="https://publications.waset.org/292/iso690" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">ISO 690</a> <a href="https://publications.waset.org/292.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">2227</span> </span> </div> </div> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2</span> Effect of Lactic Acid Bacteria Inoculant on Fermentation Quality of Sweet Sorghum Silage</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=Azizza%20Mala">Azizza Mala</a>, <a href="https://publications.waset.org/search?q=Babo%20Fadlalla"> Babo Fadlalla</a>, <a href="https://publications.waset.org/search?q=Elnour%20Mohamed"> Elnour Mohamed</a>, <a href="https://publications.waset.org/search?q=Siran%20Wang"> Siran Wang</a>, <a href="https://publications.waset.org/search?q=Junfeng%20Li"> Junfeng Li</a>, <a href="https://publications.waset.org/search?q=Tao%20Shao"> Tao Shao</a> </p> <p class="card-text"><strong>Abstract:</strong></p> <p>Sweet sorghum is considered one of the best plants for silage production and is now a more important feed crop in many countries worldwide. It is simple to ensile because of its high water-soluble carbohydrates (WSC) concentration and low buffer capacity. This study investigated the effect of adding Pediococcus acidilactici AZZ5 and Lactobacillus plantarum AZZ4 isolated from elephant grass on the fermentation quality of sweet sorghum silage. One commercial bacteria Lactobacillus Plantarum, Ecosyl MTD/1(CB), and two strains were used as additives Pediococcus acidilactici (AZZ5), Lactobacillus plantarum subsp. Plantarum (AZZ4) at 6 log colony forming units (cfu)/g of fresh sweet sorghum grass in laboratory silos (1000 g). After 15, 30, and 60 days, the silos for each treatment were opened. All of the isolated strains enhanced the silage quality of sweet sorghum silage compared to the control, as evidenced by significantly (P < 0.05) lower ammonia nitrogen (NH3-N) content and undesirable microbial counts, as well as greater lactic acid (LA) contents and lactic acid/acetic acid (LA/AA) ratios. In addition, AZZ4 performed better than all other inoculants during ensiling, as evidenced by a significant (P < 0.05) reduction in pH and ammonia-N contents and a significant increase in LA contents.</p> <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=Fermentation" title="Fermentation">Fermentation</a>, <a href="https://publications.waset.org/search?q=Lactobacillus%20plantarum" title=" Lactobacillus plantarum"> Lactobacillus plantarum</a>, <a href="https://publications.waset.org/search?q=lactic%20acid%20bacteria" title=" lactic acid bacteria"> lactic acid bacteria</a>, <a href="https://publications.waset.org/search?q=Pediococcus%20acidilactic" title=" Pediococcus acidilactic"> Pediococcus acidilactic</a>, <a href="https://publications.waset.org/search?q=sweet%20sorghum." title=" sweet sorghum."> sweet sorghum.</a> </p> <a href="https://publications.waset.org/10013454/effect-of-lactic-acid-bacteria-inoculant-on-fermentation-quality-of-sweet-sorghum-silage" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/10013454/apa" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">APA</a> <a href="https://publications.waset.org/10013454/bibtex" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">BibTeX</a> <a href="https://publications.waset.org/10013454/chicago" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Chicago</a> <a href="https://publications.waset.org/10013454/endnote" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">EndNote</a> <a href="https://publications.waset.org/10013454/harvard" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Harvard</a> <a href="https://publications.waset.org/10013454/json" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">JSON</a> <a href="https://publications.waset.org/10013454/mla" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">MLA</a> <a href="https://publications.waset.org/10013454/ris" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">RIS</a> <a href="https://publications.waset.org/10013454/xml" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">XML</a> <a href="https://publications.waset.org/10013454/iso690" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">ISO 690</a> <a href="https://publications.waset.org/10013454.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">209</span> </span> </div> </div> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1</span> A Static Android Malware Detection Based on Actual Used Permissions Combination and API Calls</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=Xiaoqing%20Wang">Xiaoqing Wang</a>, <a href="https://publications.waset.org/search?q=Junfeng%20Wang"> Junfeng Wang</a>, <a href="https://publications.waset.org/search?q=Xiaolan%20Zhu"> Xiaolan Zhu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Android operating system has been recognized by most application developers because of its good open-source and compatibility, which enriches the categories of applications greatly. However, it has become the target of malware attackers due to the lack of strict security supervision mechanisms, which leads to the rapid growth of malware, thus bringing serious safety hazards to users. Therefore, it is critical to detect Android malware effectively. Generally, the permissions declared in the AndroidManifest.xml can reflect the function and behavior of the application to a large extent. Since current Android system has not any restrictions to the number of permissions that an application can request, developers tend to apply more than actually needed permissions in order to ensure the successful running of the application, which results in the abuse of permissions. However, some traditional detection methods only consider the requested permissions and ignore whether it is actually used, which leads to incorrect identification of some malwares. Therefore, a machine learning detection method based on the actually used permissions combination and API calls was put forward in this paper. Meanwhile, several experiments are conducted to evaluate our methodology. The result shows that it can detect unknown malware effectively with higher true positive rate and accuracy while maintaining a low false positive rate. Consequently, the AdaboostM1 (J48) classification algorithm based on information gain feature selection algorithm has the best detection result, which can achieve an accuracy of 99.8%, a true positive rate of 99.6% and a lowest false positive rate of 0. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=Android" title="Android">Android</a>, <a href="https://publications.waset.org/search?q=permissions%20combination" title=" permissions combination"> permissions combination</a>, <a href="https://publications.waset.org/search?q=API%20calls" title=" API calls"> API calls</a>, <a href="https://publications.waset.org/search?q=machine%20learning." title=" machine learning."> machine learning.</a> </p> <a href="https://publications.waset.org/10005499/a-static-android-malware-detection-based-on-actual-used-permissions-combination-and-api-calls" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/10005499/apa" 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