Northwestern Polytechnical University, Northwestern Polytechnical University, Northwestern Polytechnic University (NPU), Northwestern Polytechnical University, Northwestern Polytechnical University, Northwestern Polytechnic University (NPU), Northwestern Polytechnical University, Northwestern Polytechnical University, Northwestern Polytechnical University, affiliation not provided to SSRN, Northwestern Polytechnical University, Northwestern Polytechnic University (NPU) - School of Chemistry and Chemical Engineering and Northwestern Polytechnic University (NPU)