The rankings of second-tier universities in Gansu, China, are typically determined by various factors such as academic performance, research output, and reputation. Some of the notable second-tier universities in Gansu include Lanzhou University of Technology, Gansu University of Technology, and Gansu Agricultural University. These institutions are recognized for their strong academic programs and contributions to research and development in their respective fields.

The rankings of these universities are influenced by several factors. Firstly, Lanzhou University of Technology is often ranked highly due to its strong engineering programs and research output in areas such as energy and environmental engineering. According to the 2021 China University Evaluation, Lanzhou University of Technology is ranked 51st among all universities in China, placing it among the top second-tier institutions.

Gansu University of Technology, another prominent second-tier university in Gansu, is known for its excellent programs in materials science and engineering. It is consistently ranked among the top 100 universities in China, as indicated by the 2020 Academic Ranking of World Universities (ARWU). The university's research output and academic performance contribute significantly to its ranking.

Gansu Agricultural University, while not as highly ranked as the previous two institutions, is recognized for its contributions to agricultural research and education. It is ranked 237th among all universities in China, according to the 2021 China University Evaluation. The university's focus on agricultural sciences and its commitment to rural development are key factors in its ranking.

The rankings of these universities are also influenced by the quality of faculty, student-to-faculty ratio, and infrastructure. For instance, Lanzhou University of Technology has a strong faculty with numerous professors holding doctorates, which enhances the quality of education and research. Similarly, Gansu University of Technology has a low student-to-faculty ratio, ensuring that students receive personalized attention and support.

In conclusion, the rankings of second-tier universities in Gansu are determined by a combination of academic performance, research output, and reputation. Lanzhou University of Technology, Gansu University of Technology, and Gansu Agricultural University are among the top institutions in the province, known for their strong programs in engineering, materials science, and agriculture, respectively. These rankings are reflective of the universities' commitment to excellence in education and research.