Limin Ren

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OBJECTIVE To investigate the association of retinal vascular calibers with hyperuricemia in a middle-aged and elderly population. METHODS A cross-sectional design was applied in this study and 869 participants aged =40 years from a high-risk group for diabetes were recruited. All participants received the anthropometrical measurements and laboratory(More)
The concentrations of Cu, Pb, Zn and Cd were measured in water and sediment to determine their distribution characteristics and potential ecological risks of the Lake Dalinouer. The results revealed that the dominate form of Cu, Pb, Cd and Zn in surface sediments respectively were organic sulfides, Fe-Mn oxides, carbonates and Fe-Mn oxides, with a mean(More)
Systemic lupus erythematosus (SLE) is a potentially life-threatening autoimmune disease characterized by altered balance of activity between effector and regulatory CD4(+) T cells. The homeostasis of CD4(+) T cell subsets is regulated by interleukin (IL)-2, and reduced production of IL-2 by T cells is observed in individuals with SLE. Here we report that(More)
Zeolites play numerous important roles in modern petroleum refineries and have the potential to advance the production of fuels and chemical feedstocks from renewable resources. The performance of a zeolite as separation medium and catalyst depends on its framework structure. To date, 213 framework types have been synthesized and >330,000 thermodynamically(More)
Aimed to coating cables for cable-stayed bridges, a continuous climbing pneumatic cable maintenance robot is developed. Climbing mechanism driven by pneumatic system is devised and design scheme of pneumatic system which take the synchronized proportional speed distribute loop as core is presented. These make the robot move continuously and stably. The(More)
Obstacle avoidance is the basic requirement for any autonomous mobile robot. Fuzzy intelligent obstacle avoidance strategy is proposed in this paper for the wheeled mobile robot tracking a target in the environment with obstacles, which is composed of two fuzzy logic controllers and an intelligent coordinator. Run-to-goal fuzzy controller makes the robot(More)
Low-cost copper-amine complex was rationally designed to be a novel template for one-pot synthesis of Cu-SSZ-13 zeolites. Proper confirmation and appropriate size make this complex fit well with CHA cages as an efficient template. The products exhibit superior catalytic performance on NH(3)-SCR reaction.
Mesoporous silica and carbon materials have been successfully synthesized via a novel calcination induced phase separation of organic/inorganic hybrids prepared from solvothermal polymerization of polyvinyl alcohol (PVA) and tetraethyl orthosilicate (TEOS) in dimethyl sulfoxide (DMSO). Combined characterizations of XRD, nitrogen isotherms, and TEM(More)