检索结果-南通市图书馆

Morphology of metal nanoparticles photodeposited on TiO_2/silical gel and photothermal activity for destruction of ethylene

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2006年第1期18卷 76-82页

作者： hu Chun LIN Lan-yu hu Xue-xiang Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beij ing 100085 China

The morphology of supported metal nanoparticles on TiO2/silical gel （TSO） and photothermal synergism were investigated for destruction of ethylene. During photocatalytic deposition of metal nanopartilces, the effects of pH and light intensity on the morphology of coated platinum, palladium, gold on TiO2/silical gel were studied. Moreover, these catalysts were characterized by TEM, UV-Vis DRS. The pH of preparing solution have strong influence on dispersion, size and sites of Pt, Pd and Au on TSO, which were controlled by the electrostatic binding of HPtCl5^- AuCl4^- and TiOH2^＋, Pd^2＋ and TiO^- respectively. Platinum, gold and palladium nanoparticles were uniformly highly dispersed on the titanol sites not silanol of TiO2/silical gel under pH=2, pH =9.9 respectively. For the photodegradation of ethylene, they show higher photothermal efficiency than those prepared with other pH conditions under UV illumination in a non-circulating photoreactor. The optimum weight loadings of Pt, Au, and Pd were 0.25 wt%, 0.5 wt%, 1 wt%, respectively. The synergistic effect enhanced ethylene removal and CO2 production. Thcse results verify that the best photothermal synergistic effect depends on the dispersion, size of noble metal nano-particles. FTIR analyses of the used Pt-, Pd-TSO catalysts indicated that no significant by-products were accumulated on the surface of the catalysts, leading to them longer lifetime.

关键词： photodeposition TiO2/silical gel noble metal dispersion photothermal synergism

Efficient removal of algae and turbidity from water by a composite coagulant composed of a cationic starch and attapulgite

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2022年第12期65卷 2979-2989页

作者： JIN JiaSheng XIA Wei hu Pan YANG hu State Key Laboratory of Pollution Control and Resource Reuse School of EnvironmentNanjing UniversityNanjing 210023China Quanzhou Institute for Environmental Protection Industry Nanjing UniversityQuanzhou 362000China

Algae and suspended colloidal particles produced high turbidity in water,weakened water purification,and threatened the safety of the water *** this study,a series of composite coagulants(atp-st-CTA)composed of a cationic starch(st-CTA)and attapulgite(ATP)with different fed mass ratios were fabricated by a simple method to coagulate kaolin suspension with initial turbidity of 80.0 NTU and Chlorella suspension with 0.25 mg/L of chlorophyll a(chla),*** transform infrared spectroscopy and scanning electron microscopy investigated the structural characteristics of *** maximum turbidity and chla removal rates of atp-st-CTA were 92.2%and 100.0%,respectively,at natural pH *** effects of the fed mass ratio of st-CTA to ATP in the composites,dose,pH,and coexisting humic acid on the coagulation performance of atp-st-CTA were comprehensively *** on the apparent coagulation behaviors,the zeta potentials of the supernatants after coagulation,and the flocs properties,the coagulation mechanisms of atp-st-CTA were discussed in *** complete charge neutralization due to st-CTA and the enhanced sedimentation by ATP synergistically removed turbidity and algae from the water *** short,atp-st-CTA as a talented material has a notable prospect in applications of water treatment owing to its advantages of environmental friendliness,low cost,and high efficiency.

关键词： composite coagulant cationic starch attapulgite turbidity removal algae removal coagulation mechanism

Agricultural production structure,market conditions and farmers’nutritional intake in rural China

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2022年第6期21卷 1812-1824页

作者： WAN Yue hu Hao Wuyang hu College of Economics and Management Nanjing Agricultural UniversityNanjing 210095P.R.China Department of Agricultural Environmentaland Development EconomicsThe Ohio State UniversityColumbus 43210USA

Nutrition poverty alleviation is an effective measure to improve the nutritional status of economically disadvantaged individuals,fundamentally improving their health and reducing *** on the Entitlement Theory and using the China Health and Nutrition Survey(CHNS)data,this paper examines the relationship between farmers’nutritional intake,production structure and regional market *** show that farmers with diversified production have better nutritional intake than those who ***,the correlation between regional market conditions and nutritional intake varies between economically disadvantaged and non-economically disadvantaged *** conditions significantly influence the carbohydrate and fat intake of economically disadvantaged households and are positively associated with the dietary structure and nutritional intake of non-economically disadvantaged ***,income is positively correlated with the nutritional intake of non-economically disadvantaged households but not with economically disadvantaged ones.

关键词： Chinese farmer nutrition economically disadvantaged households diversity of agricultural production regional market conditions

Surgical Technique for Reconstruction of Diaphyseal Defect with Endoprosthesis following Intercalary Resection in Femoral Shaft

在线全文

学校读者我要写书评

暂无评论

中华骨科杂志 2015年第3期35卷 I0010-I0012页

作者： Yong-cheng hu Department of Bone Oncology Tianfin Hospital Tianfin China

IntroductionThe options for reconstruction of diaphyseal skeletal defects after excision of bone tumors in the shaft of long bones include the use of autogenous vascularized fibular grafts1,autogenous extracorporeally inactivated bone2,massive allografts3,a combination of autogenous fibular grafts and allografts4,5 and intercalary endoprostheses6-8.

关键词：摘要编辑部编辑工作读者作者

Sequential use of ultraviolet light and chlorine for reclaimed water disinfection

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2011年第10期23卷 1605-1610页

作者： Xiujuan Wang Xuexiang hu Chun hu Dongbin Wei State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China

Several disinfection processes of ultraviolet （UV）, chlorine or UV followed by chlorine were investigated in municipal wastewater according to the inactivation of Escherichia coli, Shigella dysenteriae and toxicity formation. The UV inactivation of the tested pathogenic bacteria was not affected by the quality of water. It was found that the inactivated bacteria were obviously reactivated after one day in dark. Fluorescent light irradiation increased the bacteria repair. The increase of UV dosage could cause more damage to bacteria to inhibit bacteria self-repair. No photoreactivation was detected when the UV dose was up to 80 mJ/cm2 for E. coli DH5ct, and 23 mJ/cm2 for S. dysenteriae. Nevertheless, sequential use of 8 mJ/cm2 of UV and low concentration of chlorine （1.5 mg/L） could effectively inhibit the photoreactivation and inactivate E. coli below the detection limits within seven days. Compared to chlorination alone, the sequential disinfection decreased the genotoxicity of treated wastewater, especially for the sample with high NH3-N concentration.

关键词： chlorine disinfection sequential disinfection UV disinfection photoreactivation genotoxicity wastewater reclamation

Two-Type Information Fusion Based IP-to-AS Mapping Table Refining

在线全文

学校读者我要写书评

暂无评论

Journal of Computer Science & Technology 2017年第3期32卷 571-584页

作者： Qing Jiang Hang-Yu hu Guang-Min hu School of Communication and Information Engineering University of Electronic Science and Technology of China Chengdu 611731 China

The Internet topology at the autonomous system （AS） level is of great importance, and traceroute has been known to be a potential tool to obtain a complete AS topology. The original IP-to-AS mapping table maps the IP addresses in traceroute paths to their origin ASes, which may cause false AS links. The existing methods refine the original mapping table based on traceroute-BGP path pairs or alias resolution data. However, the information extracted from either of them is inaccurate and incomplete. In this paper, we present a two-type information fusion based method to refine the original mapping table. We extract four kinds of information from path pair and alias resolution data. Based on these information, we build a candidate AS set for each router. Then we choose the AS that is consistent with the existing information to be the owner AS of each router and map all of the IP addresses on the router to it. We validate the result with the ground truth from PeeringDB and Looking Glass severs. Compared with the existing methods, our method produces a more accurate mapping table. In addition, we discuss the coverage of our method and show that our method is convergent and more robust against the reduction of information or the increase of incorrect information.

关键词： network topology Internet routers BGP traceroute

A complete coalition logic of temporal knowledge for multi-agent systems

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Computer Science 2015年第1期9卷 75-86页

作者： Qingliang CHEN Kaile SU Yong hu Guiwu hu Department of Computer Science Jinan University Guangzhou 510632 China Institute for Integrated and Intelligent Systems Griffith University Brisbane Qld 4111 Australia 3 Institute of Business Intelligence and Knowledge Discovery Guangdong University of Foreign Studies Guangzhou 510006 China School of Mathematics and Statistics Guangdong University of Finance and Economics Guangzhou 510320 China

Coalition logic （CL） is one of the most influential logical formalisms for strategic abilities of multi-agent systems. CL can specify what a group of agents can achieve through choices of their actions, denoted by [C]φ to state that a group of agents C can have a strategy to bring about φ by collective actions, no matter what the other agents do. However, CL lacks the temporal dimension and thus can not capture the dynamic aspects of a system. Therefore, CL can not formalize the evolvement of rational mental attitudes of the agents such as knowledge, which has been shown to be very useful in specifications and verifications of distributed systems, and has received substantial amount of studies. In this paper, we introduce coalition logic of temporal knowledge （CLTK）, by incorporating a temporal logic of knowledge （Halpern and Vardi＇s logic of CKLn） into CL to equip CL with the power to formalize how agents＇ knowledge （individual or group knowledge） evolves over the time by coalitional forces and the temporal properties of strategic abilities as well. Furthermore, we provide an axiomatic system for CLTK and prove that it is sound and complete, along with the complexity of the satisfiability problem which is shown to be EXPTIME-complete.

关键词： coalition logic temporal logic of knowledge complete axiomatization multi-agent systems

Rheological Behavior of Polymer Melts and Concentrated SolutionsPart V: A New Molecular Theory of Non-linear Viscoelasticity for Polymeric Suspensions

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 1999年第2期15卷 169-177页

作者： Song, MS Zhou, W hu, GX hu, LJ Beijing Univ Chem Technol Inst Polymer Mat Beijing 100029 Peoples R China Harbin Inst Technol Dept Appl Chem Harbin 150001 Peoples R China

A double-network model is established, which consists of the segments, E and A-constituent chains, the polymeric chains entangled with other ones by multi-entanglement and polymeric chains connected to a great number of destructible particles by multi-adsorption, based on which the E and A-constituent chains can be recreated and released dynamically. The distribution function of the end-to-end vector, the statistical distribution function of conformation for two kinds of chains in the multi-entanglement and multi-adsorption states and their number of polymeric chains are calculated by the combination of statistical mechanics and kinetics. Then the viscoelastic free energies of deformation for two kinds of the networks and suspensions are calculated by Boltzmann's statistical theory. Also, elastic modulus and memory function for two kinds of the network and suspensions are derived. Consequently, a new molecular theory df the non-linear viscoelasticity for polymeric suspensions is proposed, and the constitutive equation and material function with yielding and thinning for the polymeric suspensions in different flow fields are derived from this theory.

关键词： Polymers

Superconducting gap opens fully in the newly found topological kagome metal CsV_(3)Sb_(5)

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2021年第10期64卷 21-22页

作者： Hai-hu Wen National Laboratory of Solid State Microstructures and Department of Physics Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China

Compounds with kagome lattices can accommodate several kinds of novel quantum states, such as the quantum spin liquid, non-trivial topological Dirac bands, and strongly renormalized flat bands, which may lead to vario... 详细信息

关键词： properties. topological bands