Zhejiang Gongshang University

About: Zhejiang Gongshang University is a education organization based out in Hangzhou, China. It is known for research contribution in the topics: Adsorption & Supply chain. The organization has 8258 authors who have published 7670 publications receiving 90296 citations. The organization is also known as: Zhèjiāng Gōngshāng Dàxué.

Enhanced Performance of Polyurethane Hybrid Membranes for CO2 Separation by Incorporating Graphene Oxide: The Relationship between Membrane Performance and Morphology of Graphene Oxide.

Abstract: Polyurethane hybrid membranes containing graphene oxide (GO) with different morphologies were prepared by in situ polymerization. The separation of CO2/N2 gas mixtures was studied using these novel membranes. The results from the morphology characterization of GO samples indicated that the oxidation process in the improved Hummers method introduced oxygenated functional groups into graphite, making graphite powder exfoliate into GO nanosheets. The surface defects on the GO sheets increased when oxidation increased due to the introduction of more oxygenated functional groups. Both the increase in oxygenated functional groups on the GO surface and the decrease in the number of GO layers leads to a better distribution of GO in the polymer matrix, increasing thermal stability and gas separation performance of membranes. The addition of excess oxidant destroyed the structure of GO sheets and forms structural defects, which depressed the separation performance of membranes. The hybrid membranes containing well-...

Secure multi-party quantum summation based on quantum Fourier transform

Abstract: In this paper, we propose a novel secure multi-party quantum summation protocol based on quantum Fourier transform, where the traveling particles are transmitted in a tree-type mode. The party who prepares the initial quantum states is assumed to be semi-honest, which means that she may misbehave on her own but will not conspire with anyone. The proposed protocol can resist both the outside attacks and the participant attacks. Especially, one party cannot obtain other parties' private integer strings; and it is secure for the colluding attack performed by at most $$ n - 2 $$n-2 parties, where $$ n $$n is the number of parties. In addition, the proposed protocol calculates the addition of modulo $$ d $$d and implements the calculation of addition in a secret-by-secret way rather than a bit-by-bit way.

Soil Characteristics in Relation to Vegetation Communities in the Wetlands of Poyang Lake, China

Abstract: Poyang Lake is an important wetland with global ecological functions. Impact of plant species composition on soil physicochemical characteristics is potentially critical but is as yet poorly understood in this great, shallow and water passing lake wetland. Five dominant plant communities, Phragmites communis community (Phragmites), Polygonum hydropiper community (P. hydropiper), Artemisia selengensis community (A. selengensis), Carex cinerascens community (C. cinerascens) and Phalaris ayuyldinacea community (Phalaris) were surveyed to identify the influences of plant species composition on soil properties. Results show great heterogeneity in soil characters among studied vegetation communities. The lowest average values of pH and soil bulk density are presented in soil with Phragmites, while the highest ones are determined in C. cinerascens and A. selengensis, respectively. Moreover, C. cinerascens is determined with the highest average contents of total organic carbon (TOC) and total nitrogen (TN), whereas Phalaris community presents the lowest soil carbon and nutrient accumulation in surface soil. Plots of C. cinerascens, Phragmites and Phalaris are identified with obvious convergence patterns, while dispersive patterns are identified in A. selengensis and P. hydropiper, suggesting great heterogeneity in soil properties among typical communities in Poyang Lake.