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<h1 class="py-4 text-3xl">Hi, I'm Wenyao Liu</h1>
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<span class="ps-4">Assistant Professor</span>
<a href="https://ce.hnu.edu.cn/" class="ps-4">College of Civil Engineering, Hunan University</a>
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<p>As a dedicated researcher, problem solver, data enthusiast, and amateur cook, I am experienced in improving decision making by analyzing data, majoring in but not limited to engineering. Here is my secret about the wisdom of life — <p> </p> <p><center><strong>View the future and get prepared.</strong></center></p></p>
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<p> </p>
<img align="right" src="/images/01-home-skillsets.png" height="280" width = "450"/>
<h2 id="capabilities"><strong>Capabilities</strong></h2>
<details>
<summary><strong>Integrated skillsets in data science and machine learning</strong></summary>
<ul>
<li>Capabilities of data <strong>management</strong>, data <strong>wrangling</strong>, <strong>modeling</strong>, <strong>visualization</strong>, and <strong>communication</strong></li>
<li><em>Programming</em>* in R, Python, SQL, and Scala <strong>for normal and big data processing and analysis</strong></li>
<li><strong>Statistical modeling and interpretations</strong> demonstrated in published journal papers</li>
<li><strong>Machine learning and spatial-temporal analysis</strong> being applied in my Ph.D. thesis.
</details>
</li>
</ul>
<details>
<summary><strong>Professional background in transportation engineering</strong></summary>
<ul>
<li>
<p><strong>A big picture thinking in transportation engineering</strong> built on years of studying in civil engineering</p>
</li>
<li>
<p><strong>In-depth understanding of pavement performance models and specifications</strong> thanks to experience as a teaching assistant</p>
</li>
<li>
<p><strong>Proficiency in the laboratory evaluation of asphalt materials</strong> as proved by peer-reviewed publications</p>
</li>
</ul>
</details>
<details>
<summary><strong>Comprehensive soft skills and a positive personality</strong></summary>
<ul>
<li><strong>Problem-solving</strong> with innovation and skills</li>
<li><strong>Leadership</strong> with adaptability to changing situations</li>
<li><strong>Collaborative working</strong> following time and task management</li>
<li><strong>Enthusiastic communication</strong> in person or public presentation</li>
</ul>
</details>
<p> </p>
<h2 id="selected-achievements"><strong>Selected Achievements</strong></h2>
<details>
<summary><strong>Participated 6 national or state-sponsored <a href="./projects/" target="_blank"><b> projects</b> </a></strong></summary>
<ol>
<li>
<p>Utilizing Pavement Friction and Texture Data for The Reduction of Traffic Crashes and Delays (2018-2021)</p>
<p>PI: <a href="https://experts.okstate.edu/qiang.li" target="_blank">Joshua Q. Li</a></p>
<p>Sponsor: <em>Oklahoma Department of Transportation</em></p>
<p>• Analyzed friction demands, influencing factors, and appropriate models (3 papers published).</p>
<p>• Developed spreadsheet software for integrating safety costs in life cycle cost analysis (LCCA).</p>
<p>• Drafted final report and passed the ADA requirements at first submission.</p>
</li>
<li>
<p>Long Term Performance Monitoring of High Friction Surfacing Treatments (HFST) Sites (2016-2020)</p>
<p>PI: <a href="https://experts.okstate.edu/kelvin.wang" target="_blank">Kelvin C.P. Wang</a></p>
<p>Sponsor: <em>Federal Highway Administration, U.S. Department of Transportation</em></p>
<p>• Collected field performance data on 36 HFST sites over 12 states in the U.S.</p>
<p>• Evaluated the variation of HSFT sites over 3 years of observation</p>
</li>
<li>
<p>Ground Tire Rubber (GTR) Dry Process Experiment Pavement Surface Evaluation (2019-2020)</p>
<p>PI: <a href="https://experts.okstate.edu/kelvin.wang" target="_blank">Kelvin C.P. Wang</a></p>
<p>Sponsor: <em>Oklahoma Department of Transportation</em></p>
<p>• Collected field data on Ground Tire Rubber (GTR) treated pavement in Oklahoma</p>
<p>• Analyzed friction data and field profile</p>
</li>
<li>
<p>Continuous Friction Measurement Equipment (CFME) For Highway Safety Management in Oklahoma (2017-2019)</p>
<p>PI: <a href="https://experts.okstate.edu/qiang.li" target="_blank">Joshua Q. Li</a></p>
<p>Sponsor: <em>Oklahoma Department of Transportation</em></p>
<p>• Applied changepoint methods in dynamic segmentation based on CFME measurements</p>
</li>
<li>
<p>Laboratory Performance of Compound Modified Asphalts Using Waste Tire Rubber (WTR) and Amorphous Poly Alpha Olefin (APAO) (2016-2018)</p>
<p>PI: <a href="https://www.researchgate.net/profile/Kezhen-Yan" target="_blank">Kezhen Yan</a></p>
<p>Sponsor: <em>The Hunan Provincial Department of Education of China</em></p>
<p>• Evaluated the performance of compound modified asphalt with WTR and APAO</p>
</li>
<li>
<p>Anisotropic Mechanical Behavior of the Pavement Structure and Intelligent Retrieval of its Parameters (2014-2016)</p>
<p>PI: Kezhen Yan</p>
<p>Sponsor: <em>The National Natural</em> <em>Science Foundation of China</em></p>
<p>• Conducted experimental tests for providing parameters for mechanical simulation</p>
</li>
</ol>
</details>
<details>
<summary><strong>Published 12 peer-reviewed <a href="./publications/journal-papers/" target="_blank"><b> journal papers </b></a></strong></summary>
<ol>
<li>
<p>Li, J. Q.*, <strong>W. Liu</strong>, X. Yang, P. Lu, and K. C. P. Wang. 2022. “Statistical Safety Performance Models considering Pavement and Roadway Characteristics.” Journal of Advanced Transportation, 2022: e5871601. Hindawi. <a href="https://doi.org/10.1155/2022/5871601">https://doi.org/10.1155/2022/5871601</a>.</p>
</li>
<li>
<p><strong>Liu, W.</strong>, J. Q. Li*, X. Yang, K. Wang, and W. Yu. 2022. “Integrating Skid Resistance and Safety Benefits into Life Cycle Cost Analysis for Pavement Surface Treatment Selection.” Journal of Transportation Engineering, Part B: Pavements, 148 (2): 04022015. American Society of Civil Engineers. <a href="https://doi.org/10/gpqm2m">https://doi.org/10/gpqm2m</a>.</p>
</li>
<li>
<p><strong>Liu, W.</strong>, J. Q. Li*, W. Yu, and G. Yang. 2021. “Change-Point Detection Approaches for Pavement Dynamic Segmentation.” Journal of Transportation Engineering, Part B: Pavements, 147 (2): 06021001. American Society of Civil Engineers. <a href="https://doi.org/10.1061/JPEODX.0000270">https://doi.org/10.1061/JPEODX.0000270</a>.</p>
</li>
<li>
<p><strong>Liu, W.</strong>, K. Yan, J. Q. Li*, and S. Yang. 2021. “Peridynamics-based simulation of semi-circular bending (SCB) testing.” Construction and Building Materials, 268: 121190. <a href="https://doi.org/10/gj74d8">https://doi.org/10/gj74d8</a>.</p>
</li>
<li>
<p>Yan, K., <strong>W. Liu</strong>*, L. You, J. Ou, and M. Zhang. 2021. “Evaluation of waste cooling oil and European Rock Asphalt modified asphalt with laboratory tests and economic cost comparison.” Journal of Cleaner Production, 310: 127364. <a href="https://doi.org/10.1016/j.jclepro.2021.127364">https://doi.org/10.1016/j.jclepro.2021.127364</a>.</p>
</li>
<li>
<p><strong>Liu, W.</strong>, K. Yan*, D. Ge, and M. Chen. 2018. “Effect of APAO on the aging properties of waste tire rubber modified asphalt binder.” Construction and Building Materials, 175: 333–341. <a href="https://doi.org/10/gj74fb">https://doi.org/10/gj74fb</a>.</p>
</li>
<li>
<p>Yang, G., K. Wang, J. Q. Li*, M. Romero, and <strong>W. Liu</strong>. 2022. “Laboratory and Field Performance Evaluation of Warm Mix Asphalt Incorporating RAP and RAS.” KSCE J Civ Eng, 26 (1): 107. <a href="https://doi.org/10/gn34vm">https://doi.org/10/gn34vm</a>.</p>
</li>
<li>
<p>Li, J. Q.*, K. Wang, S. A. Cross, <strong>W. Liu</strong>, and K. Suitor. 2021. “ODOT Involvement with the NCAT Test Track and Task Groups.” International Conference on Transportation and Development 2021 (pp. 215-224). <a href="https://doi.org/10.1061/9780784483541.020">https://doi.org/10.1061/9780784483541.020</a>.</p>
</li>
<li>
<p>Yan, K.*, H. Lan, Z. Duan, <strong>W. Liu</strong>, L. You, S. Wu, and M. Miljković. 2021. “Mechanical performance of asphalt rejuvenated with various vegetable oils.” Construction and Building Materials, 293: 123485. <a href="https://doi.org/10.1016/j.conbuildmat.2021.123485">https://doi.org/10.1016/j.conbuildmat.2021.123485</a>.</p>
</li>
<li>
<p>Liu, J., K. Yan*, <strong>W. Liu</strong>, and X. Zhao. 2020. “Partially replacing Styrene-Butadiene-Styrene (SBS) with other asphalt binder modifier: Feasibility study.” Construction and Building Materials, 249: 118752. <a href="https://doi.org/10.1016/j.conbuildmat.2020.118752">https://doi.org/10.1016/j.conbuildmat.2020.118752</a>.</p>
</li>
<li>
<p>Zhu, W., J. Pan, W. Ma*, S. Deng, W. Zhou, <strong>W. Liu</strong>, S. Long, C. Yang, and L. You. 2021. “Dynamic response of the heterogeneous deep-sea sediment with nonlinear gradient modulus to mining machine loading.” Marine Georesources & Geotechnology, 40 (3): 255–266. Taylor & Francis. <a href="https://doi.org/10/gj8fnc">https://doi.org/10/gj8fnc</a>.</p>
</li>
<li>
<p>Yan, K.*, W. He, M. Chen, and <strong>W. Liu</strong>. 2016. “Laboratory investigation of waste tire rubber and amorphous poly alpha olefin modified asphalt.” Construction and Building Materials, 129: 256–265. <a href="https://doi.org/10.1016/j.conbuildmat.2016.10.090">https://doi.org/10.1016/j.conbuildmat.2016.10.090</a>.</p>
</li>
<li>
<p>Zhang X., K Yan, and <strong>W. Liu*</strong>. 2022. “Partially Replacing Cement with Rice Husk Ash (RHA) in Cement Stabilized Macadam (CSM) containing Reclaimed Asphalt Pavement (RAP) for Qualified Subbase.” (Under Review).</p>
</li>
<li>
<p><strong>Liu, W</strong>, K Yan*, and Hongyan Ji. 2022. “Bonding Performance Evaluation on WTR-APAO Composite Modified Asphalt as Waterproof Adhesive Layer for Concrete Bridge”. (Under Review).</p>
</li>
<li>
<p><strong>Liu, W.</strong>, J. Q. Li, and K. Wang. 2022. “Pavement characteristics prediction by machine learning on vehicular sensor data.” (In Preparation).</p>
</li>
</ol>
</details>
<details>
<summary><strong>Received a number of <a href="./publications/honors/" target="_blank"><b> honors</b></a> and authorized <a href="./publications/patents/" target="_blank"><b>patents</b></a></strong></summary>
<h4 id="selected-honors"><strong>Selected Honors:</strong></h4>
<ol>
<li>
<h6 id="best-poster-award----------------------------------------oklahoma-city-ok-oct-2020"><strong>Best Poster Award</strong> (Oklahoma City, OK. Oct. 2020)</h6>
<h6 id="wenyao-liu-joshua-li-guangwei-yang-xue-yang-and-kelvin-c-p-wang-utilizing-pavement-friction-data-for-the-reduction-of-traffic-crashes-and-delays-2020-oklahoma-transportation-research-day"><strong>Wenyao Liu</strong>, Joshua Li, Guangwei Yang, Xue Yang, and Kelvin C. P. Wang. “Utilizing Pavement Friction Data for the Reduction of Traffic Crashes and Delays.” 2020 Oklahoma Transportation Research Day.</h6>
</li>
<li>
<h6 id="outstanding-graduate-of-hunan-province------------------changsha-china-jun-2018"><strong>Outstanding Graduate of Hunan Province</strong> (Changsha, China. Jun. 2018)</h6>
</li>
<li>
<h6 id="outstanding-graduate-of-hunan-university------------------changsha-china-jun-2018"><strong>Outstanding Graduate of Hunan University</strong> (Changsha, China. Jun. 2018)</h6>
</li>
<li>
<h6 id="national-scholarship-for-graduate-student------------------china-sep-2016"><strong>National Scholarship for Graduate Student</strong> (China. Sep. 2016)</h6>
</li>
</ol>
<h4 id="patents"><strong>Patents:</strong></h4>
<ol>
<li>
<h6 id="wenyao-liu-2018-bike-saddle-capable-of-being-turned-over-for-replacement-china-invention-patent"><strong>Wenyao Liu</strong> (2018). Bike Saddle Capable of Being Turned Over for Replacement. China Invention Patent.</h6>
</li>
<li>
<h6 id="wenyao-liu-2016-a-moving-object-article-management-system-china-unity-model-patent"><strong>Wenyao Liu</strong> (2016). A Moving-object Article Management System. China Unity Model Patent.</h6>
</li>
</ol>
</details>
<details>
<summary><strong>Served as teaching assistant and reviewer in the profession</strong></summary>
<h4 id="teaching-assistant-on"><strong>Teaching assistant on</strong></h4>
<ol>
<li>
<h6 id="cive-3633-20472-transportation-engineering-oklahoma-state-university-spring-2022">CIVE-3633-20472 Transportation Engineering (Oklahoma State University, Spring 2022)</h6>
</li>
<li>
<h6 id="cive-3633-60636-transportation-engineering-oklahoma-state-university-fall-2019">CIVE-3633-60636 Transportation Engineering (Oklahoma State University, Fall 2019)</h6>
</li>
</ol>
<h4 id="reviewed-for"><strong>Reviewed for</strong></h4>
<ol>
<li>
<h6 id="trb-annual-meeting">TRB Annual Meeting</h6>
</li>
<li>
<h6 id="automation-in-construction">Automation in Construction</h6>
</li>
<li>
<h6 id="journal-of-infrastructure-systems">Journal of Infrastructure Systems</h6>
</li>
<li>
<h6 id="advances-in-data-science-and-adaptive-analysis">Advances in Data Science and Adaptive Analysis</h6>
</li>
</ol>
</details>
<p> </p>
<h2 id="education"><strong>Education</strong></h2>
<table>
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<td style="text-align:left"><strong>Oklahoma State University</strong></td>
<td style="text-align:center"><strong>Ph.D. Civil Engineering</strong> <br />(Transportation management and safety)</td>
<td style="text-align:center"><strong>Stillwater, OK</strong></td>
<td style="text-align:right"><strong>2019.01 — 2022.12</strong></td>
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<tr>
<td style="text-align:left"><strong>Hunan University</strong></td>
<td style="text-align:center"><strong>M.S. Civil Engineering</strong> <br />(Pavement materials and mechanics)</td>
<td style="text-align:center"><strong>Changsha, China</strong></td>
<td style="text-align:right"><strong>2015.09 — 2018.06</strong></td>
</tr>
<tr>
<td style="text-align:left"><strong>Hunan University</strong></td>
<td style="text-align:center"><strong>B.A. Civil Engineering</strong> <br />(Bachelor-to-Master Consecutive Class)</td>
<td style="text-align:center"><strong>Changsha, China</strong></td>
<td style="text-align:right"><strong>2011.09 — 2015.06</strong></td>
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<h2 class=" font-bold text-3xl my-4">Selected Projects</h2>
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<h3 class="mt-0">Similarity checking on four speed measurment systems</h3>
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This project utilizes multiple methods to compare the results of 4 speed measurement systems in Oklahoma. The project is undergoing, so some details cannot be provided.
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Peridynamics, a recently developed fracture mechanics methodology that extends classical continuum mechanics to discontinuous material responses, is implemented to simulate crack propagation during the SCB testing process.
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12 peer-reviewed journal papers have been published in total, where I served as key contributor in 6 SCI indexed papers and as paticipator in other 6 papers. 3 more papers were under review or in preparation.
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6 national or state-sponsored projects
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10 posters and presentations
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