Xuzhou Institute of Technology

About: Xuzhou Institute of Technology is a education organization based out in Xuzhou, China. It is known for research contribution in the topics: Catalysis & Adsorption. The organization has 1696 authors who have published 1521 publications receiving 13541 citations.

Monitoring Soil Microorganisms with Community-Level Physiological Profiles Using Biolog EcoPlates ™ in Chaohu Lakeside Wetland, East China

Abstract: Under the circumstance of wetland degradation, we used Biolog EcoPlatesTM method to investigate the impact of ecological restoration on the function of topsoil microbial communities by monitoring their metabolic diversity around Chaohu lakeside wetland. Four restoration patterns were selected, including reed shoaly land (RL), poplar plantation land (PL), abandoned shoaly grassland (GL) and cultivated flower land (FL). The result showed a rapid growth trend at the initial stage of incubation, following the fastest change rate at 72 h in both dormant and growing seasons. The Average Well Color development (AWCD) values of RL pattern was the highest at the detection points of each culture time, while the GL were the lowest. The calculation of diversity indicators also displayed significant lower McIntosh index in dormant season and Shannon-Wiener index in growing season in GL than in the others (P < 0.05). Carbohydrates and carboxylic acids were found to be the main substrates used in dormant season, whereas amino acids, polymers and phenolic acids were increasingly utilized by the microbial communities in growing season. We observed soil total potassium as the key factor that significantly affected the utilization efficiency of different carbon sources in both seasons (P < 0.05).

Research and Implementation of Fuzzy ISODATA Clustering Algorithm Based on Gene Expression Programming in Human Resource Management

Abstract: Modifications are conducted in response to some disadvantages of ISODATA algorithm. With the combination of gene expression programming (GEP) nesting, an iterative self-organizing fuzzy clustering is constituted to realize calculation optimization. The convergence speed and clustering accuracy are evidently improved. Analysis of human resource management (HRM) is made by employing the modified algorithm, Results indicate that the new algorithm not only increases the convergence speed and the clustering accuracy, but fully uses the capability of global optimization of GEP algorithm and soft classification features of ISODATA, improving the degree of intelligence. In sum, ideal clustering effect is obtained.

Hydroxylated carbon black as improved deposition support for discharge products in lithium air(oxygen)batteries

Abstract: To date, compared with that of lithium oxygen batteries, the operation of lithium air batteries is still a great challenge due to the highly deteriorated cathode performances in air, including worse discharge capacities and OER/ORR dynamics Herein, we propose hydroxylated carbon black as an improved deposition support, which not only functions as a conductive agent, but also improves the morphology of the discharge products These improvements can significantly enhance the discharge properties and chargeability of the gas cathode, particularly in simulated air or ambient air For example, the hydroxylated carbon black doubles the energy output of the air cathode in ambient air It is believed that increased defects and hydroxyls on the hydroxylated carbon surface might play an important role By the first principle calculation, it is revealed that a strong affinity between the hydroxyls and Li2O2 occurs, and this facilitates the nucleation of Li2O2 It is believed that the promoted nucleation can restrain the growth of the discharge products due to the competitive relationship between nucleation and growth of new phase in chemical reactions Finally, smaller Li2O2 nanosheets formed on the hydroxylated carbon cathode instead of the dense discharge product layer, avoid the block of the porous cathode, thus benefiting the electrochemical performances These results show that besides developing better catalysts, hydroxylation of carbon matrix is also an effective strategy to enhance the electrochemical performances of the lithium air battery

Machinability of damage-tolerant titanium alloy in orthogonal turn-milling

Abstract: The damage-tolerant titanium alloy TC21 is used extensively in important parts of advanced aircraft because of its high strength and durability. However, cutting TC21 entails problems, such as high cutting temperature, high tool tip stress, rapid tool wear, and difficulty guaranteeing processing quality. Orthogonal turn-milling can be used to solve these problems. In this study, the machinability of TC21 in orthogonal turn-milling is investigated experimentally to optimize the cutting parameters of orthogonal turn-milling and improve the machining efficiency, tool life, and machining quality of TC21. The mechanism of the effect of turn-milling parameters on tool life is discussed, the relationship between each parameter and tool life is analyzed, and the failure process of a TiAlN-coated tool in turn-milling is explored. Experiments are conducted on the integrity of the machined surface (surface roughness, metallographic structure, and work hardening) by turn-milling, and how the parameters influence such integrity is analyzed. Then, reasonable cutting parameters for TC21 in orthogonal turn-milling are recommended. This study provides strong guidance for exploring the machinability of difficult-to-cut-materials in orthogonal turn-milling and improves the applicability of orthogonal turn-milling for such materials.