China Three Gorges University

About: China Three Gorges University is a education organization based out in Yichang, China. It is known for research contribution in the topics: Catalysis & Landslide. The organization has 11161 authors who have published 8011 publications receiving 82224 citations. The organization is also known as: Sanxia Daxue.

Extensions of different type parameterized inequalities for generalized [Formula: see text]-preinvex mappings via k-fractional integrals.

Abstract: The authors discover a general k-fractional integral identity with multi-parameters for twice differentiable functions. By using this integral equation, the authors derive some new bounds on Hermite–Hadamard’s and Simpson’s inequalities for generalized $(m,h)$ -preinvex functions through k-fractional integrals. By taking the special parameter values for various suitable choices of function h, some interesting results are also obtained.

Migratory behavior of adult sea lamprey and cumulative passage performance through four fishways

Abstract: This article describes a study of PIT-tagged sea lamprey (Petromyzon marinus) ascending four fishways comprising three designs at two dams on the Connecticut River, USA. Migration between dams was rapid (median migration rate = 23 km·day−1). Movement through the fishways was much slower, however (median = 0.02–0.33 km·day−1). Overall delay at dams was substantial (median = 13.6–14.6 days); many fish failed to pass (percent passage ranged from 29% to 55%, depending on fishway), and repeated passage attempts compounded delay for both passers and failers. Cox regression revealed that fishway entry rates were influenced by flow, temperature, and diel cycle, with most lampreys entering at night and at elevated flows, but with no apparent effect of sex or length. Overall delay was influenced by slow movement through the fishways, but repeated failures were the primary factor determining delay. These data suggest that although some lamprey were able to pass fishways, they did so with difficulty, and delays incur...

Impacts of water release operations on algal blooms in a tributary bay of Three Gorges Reservoir

Abstract: Water release operation is crucial for water quality in large reservoirs such as Three Gorges Reservoir (TGR), because it determines the hydrodynamics and hence the self-purification capability. As algal blooms were often observed in some tributary bays of TGR during the release periods, high frequency field observations were carried out in a typical eutrophic tributary bay (Xiangxi River) from February 9 to May 10, 2009. In this paper we assess the hydrodynamic behaviour, density stratification, and trophic status in this bay, respectively using a series of observations for flow, physical, chemical and biological parameters. Then, we analyze the effects of reservoir release operations on algal blooms using correlation analysis method. An empirical prognosis is concluded for the likelihood of algal bloom occurrence as a function of daily fluctuation of water level (DFWL) and water temperature. Our results indicate that during the release period, the algal bloom occurrences are closely tied to the DFWL in that if the ratio of DFWL to total water depth ranges from −10×10−4 to 0, the possibility of algal blooms may reach up to 70%, and if the ratio is less than −10×10−4, then that risk can be significantly reduced to less than 10%. This paper finally suggests that a wave-type water release operation should be beneficial in reducing bloom frequencies in the tributary water bodies, which is helpful for TGR water quality management, especially for the water release operation optimization.