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Preparation of hollow-fiber nanofiltration membranes of high performance for effective removal of PFOA and high resistance to BSA fouling

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Journal of Environmental Sciences 2022年第12期34卷 14-24页

作者： Wenjing Tang Yunyi Meng Bin yang Dongyu he yan Li Bojun Li Zheming Shi Changwei zhao College of Resources and Environmental Sciences China Agricultural UniversityBeijing 100193China Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China The Fourth Construction CO.LTD of China Electronics System Engineering Tianjin 300130China State Key Laboratory of Water Environment Simulation School of EnvironmentBeijing Normal UniversityBeijing 100875China

Nanofiltration(NF)process has become one of the most promising technologies to remove micro-organic combined water *** a NF membrane material with efficient separation for perfluorooctanoic acid(PFOA)combined pollution is highly desired,this manuscript targets this unmet need *** this work,hydrophilic SiO_(2)nanoparticles with various contents blended with carboxylic multiwalled carbon nanotube were used to modify poly(m-phenylene isophthal amide)(SiO_(2)/CMWCNT/PMIA)hollow fiber NF *** modified membrane with 0.1 wt%SiO_(2)doping exhibits way better fouling resistance with irreversible fouling ratio decreased dramatically from 18.7%to 2.3%,and the recovery rate of water flux increases significantly from 81.2%to 97.7%.The separation experiment results had confirmed that the modified membrane could improve the rejection from 97.2%to 98.6%for perfluorooctanoic acid(PFOA)and its combined pollution with bovine serum albumin(BSA).It is clear that this reported SiO_(2)/CMWCNT/PMIA hollow fiber NF membrane potentially could be applied in water *** research also provides a theoretical basis for efficiently removal of PFOA and its combined pollution by NF membrane.

关键词： Nanofiltration SiO_(2)nanoparticles Perfluorooctanoic acid Combined pollution Water treatment

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Effect of sodium salicylate on oxidative stress and insulin resistance induced by free fatty acids

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hepatobiliary & Pancreatic Diseases International 2010年第1期9卷 49-53页

作者： he, Bing zhao, Sheng Zhang, Wei Li, yan Han, Ping China Med Univ Shengjing Affiliated Hosp Dept Endocrinol Shenyang 110004 Peoples R China China Med Univ Affiliated Hosp 4 Dept Internal Med Shenyang 110032 Peoples R China

BACKGROUND: It has been reported that high-dose salicylates improve free fatty acids (FFAs)-induced insulin resistance and beta-cell dysfunction in vitro, but the mechanism remains uncertain. In insulin-resistant rats, we found that the supplementation of sodium salicylate is associated with a reduction of plasma malondialdehyde (MDA), a marker of oxidative stress. Few studies have investigated the effects of salicylates on oxidative stress levels in insulin-resistant animal models. This study aimed to assess the effect of sodium salicylate on insulin sensitivity and to explore the potential mechanism by which it improves hepatic and peripheral insulin resistance. METHODS: Intralipid+heparin (IH), saline (SAL), or intralipid+heparin+sodium salicylate (IHS) were separately infused for 7 hours in normal Wistar rats. During the last 2 hours of the infusion, hyperinsulinemic-euglycemic clamping was 3 performed with [6-(3)H] glucose tracer. Plasma glucose was measured using the glucose oxygenase method. Plasma insulin and C-peptide were determined by radioimmunoassay. MDA levels and glutathione peroxidase (GSH-PX) activity in the liver and skeletal muscle were measured with colorimetric kits. RESULTS: Compared with infusion of SAL, IH infusion increased hepatic glucose production (HGP), and decreased glucose utilization (GU) (Phe elevation of plasma free fatty acids increased the MDA levels and decreased the GSH-PX activity in the liver and muscle (Phe GSH-PX activity by 35% (Phe liver and muscle. The administration of the anti-inflammatory drug sodium salicylate reduces the degree of oxidative stress, therefore improving hepatic and peripheral insulin resistance. IKK-beta and NF-kappa B provide potential pathogenic

关键词： free fatty acids sodium salicylate oxidative stress insulin resistance hepatic glucose production

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New rapid transfer alignment method for SINS of airborne weapon systems

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Journal of Systems Engineering and Electronics 2014年第2期25卷 281-287页

作者： Yu Chen yan zhao School of Instrumentation Science and Opto-electronics Engineering Beihang University

Transfer alignment is an effective alignment method for the strapdown inertial navigation system （SINS） of airborne weapon systems. The traditional transfer alignment methods for large misalignment angles alignment use nonlinear transfer align- ment models and incorporate nonlinear filtering. A rapid transfer alignment method with linear models and linear filtering for ar- bitrary misalignment angles is presented. Through the attitude quaternion decomposition, the purpose of transfer alignment is converted to estimate a constant quaternion. Employing special manipulations on measurement equation, velocity and attitude linear measurement equations are derived. Then the linear trans- fer alignment model for arbitrary misalignment angles is built. An adaptive Kalman filter is developed to handle modeling errors of the measurement noise statistics. Simulation results show feasibili- ty and effectiveness of the proposed method, which provides an alternative rapid transfer alignment method for airborne weapons.

关键词： strapdown inertial navigation system (SINS) transferalignment Kalman filter quaternion.

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Deep learning enables nanoscale X-ray 3D imaging with limited data

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Light(Science & Applications) 2023年第7期12卷 1184-1186页

作者： Chonghang zhao Hanfei yan National Synchrotron Light Source l Brookhaven National LaboratoryUptonNY11973USA

Deep neural network can greatly improve tomography reconstruction with limited data.A recent effort of combining ptycho-tomography model with the 3D U-net demonstrated a significant reduction in both the number of projections and computation time,and showed its potential for integrated circuit imaging that requires high-resolution and fast measurement speed.

关键词： Deep neural enable

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The influence mechanism of the strain rate on the tensile behavior of copper nanowire

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Science China(Technological Sciences) 2019年第11期62卷 2014-2020页

作者： zhao Leiyang LIU yan School of Aerospace Engineering Tsinghua University

The influence mechanism of the strain rate on the tensile behavior of the copper nanowires is investigated with molecular dynamics(MD)*** failure modes are observed at the loading strain rates from 5×10^6 to 1×10^9s^-*** three modes are named slipping mode,mixed mode and necking mode,*** evolution of atomic configurations show that the competition of the lattice recovery and the dislocation multiplication determines the fracture mode,and the importance of lattice recovery decreases with the increase of strain *** input and the reflection of the tensile wave,which is induced by tensile loading,also plays an important role in the failure *** location of necking tends to approach the two ends of nanowire at higher strain rates.

关键词： strain rate effect copper nanowire molecular dynamics dislocation failure mode lattice recovery

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Experimental studies on behavior of fully grouted reinforced-concrete masonry shear walls

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Earthquake Engineering and Engineering Vibration 2015年第4期14卷 743-757页

作者： zhao yan Wang Fenglai Key Lab of Structures Dynamic Behavior and Control (Harbin Institute of Technology) Ministry of Education School of Civil Engineering Harbin Institute of Technology

An experimental study is conducted on fully grouted reinforced masonry shear walls (RMSWs) made from concrete blocks with a new configuration. Ten RMSWs are tested under reversed cyclic lateral load to investigate the influence of different reinforcements and applied axial stress values on their seismic behavior. The results show that flexural strength increases with the applied axial stress, and shear strength dominated by diagonal cracking increases with both the amount of horizontal reinforcement and applied axial stress. Yield displacement, ductility, and energy dissipation capability can be improved substantially by increasing the amount of horizontal reinforcement. The critical parameters for the walls are derived from the experiment: displacement ductility values corresponding to 15% strength degradation of the walls reach up to 2.6 and 4.5 in the shear and flexure failure modes, respectively; stiffness values of flexure- and shear-dominated walls rapidly degrade to 17%–19% and 48%–57% of initial stiffness at 0.50 Dmax (displacement at peak load). The experiment suggests that RMSWs could be assigned a higher damping ratio (～14%) for collapse prevention design and a lower damping value (～7%) for a fully operational limit state or serviceability limit state.

关键词： reinforced-concrete masonry shear wall shear strength ductility stiffness degradation energy dissipation equivalent viscous damping ratio

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Genome-Wide Characterization of the Hyaluronidase Gene Family and Their Potential Roles in Viviparous Black Rockfish(Sebastes schlegeli)

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Journal of Ocean University of China 2024年第2期23卷 487-498页

作者： LIU Zhiying NIU Jingning zhao Xi LIU Huaxiang LI Zibin he yan QI Jie MOE Key Laboratory of Marine Genetics and Breeding College of Marine Life SciencesOcean University of ChinaQingdao 266003China Key Laboratory of Tropical Aquatic Germplasm of Hainan Province Sanya Oceanographic InstituteOcean University of ChinaSanya 572025China

Black rockfish(Sebastes schlegelii)has evolved viviparous reproduction *** from the oviparous fishes,the spermatozoa of black rockfish are stored on the surface of ovarian follicle for over four months until the egg mature in ovary,while the adaptive evolution of fertilization-related genes remains to be *** the present study,based on the genome and transcriptome information of black rockfish,a total of 10 hyaluronidase genes were identified by phylogenetic and sequence analyses,including hyal1,hyal2,hyal3,hyal4,hyal6 and spam1a,spam1b,spam1c and *** spam1 subfamilies,including spam1a,spam1b,spam1c and spam1d,were significantly expanded compared to other *** adaptive evolution of hyaluronidase was further investigated by selection pressure analysis of branch model and branch site *** results showed that only spam1 subfamily was positively selected with a large number of positive selection sites,and the evolution rate was significantly higher thanthose of other *** positively selected sites,LYS-171 and GLY-164,were located in the neutral hyaluronidase activity domain,which was pivotal for SPAM1 to participate in enzymatic hydrolysis of the extracellular hyaluronic acid matrix and mediate acrosome reaction in ***,spam1 was mainly expressed in spermatocytes,secondary spermatocytes,and spermatids of testis,whereas it was not found in metamorphic sperm and mature sperm based on the spatiotemporal expression *** results indicated that spam1 might originate from the testis and might be an adaptation of viviparous trait in black rockfish.

关键词： adaptation of viviparous black rockfish(Sebastes schlegelii) hyaluronidase selective pressure analysis

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Development of a DFN-based probabilistic block theory approach for bench face angle design in open pit mining

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第8期16卷 3047-3062页

作者： Jianhua yan Xiansen Xing Zhihai Li Weida Ni Liuyuan zhao Chun Zhu Yuanyuan he School of Earth Sciences and Engineering Hohai UniversityNanjing210098China POWERCHINA Huadong Engineering Corporation Limited Hangzhou311122China Zhejiang Huadong Construction Corporation Limited Hangzhou310004China The Seventh Geological Brigade of Hubei Geological Bureau Yichang443000China

In open pit mining,uncontrolled block instabilities have serious social,economic and regulatory consequences,such as casualties,disruption of operation and increased regulation *** this reason,bench face angle,as one of the controlling parameters associated with block instabilities,should be carefully designed for sustainable *** study introduces a discrete fracture network(DFN)-based probabilistic block theory approach for the fast design of the bench face angle.A major advantage is the explicit incorporation of discontinuity size and spatial distribution in the procedure of key blocks *** proposed approach was applied to a granite mine in ***,DFN models were generated from a multi-step modeling procedure to simulate the complex structural characteristics of pit ***,a modified key blocks searching method was applied to the slope faces modeled,and a cumulative probability of failure was obtained for each ***,a bench face angle was determined commensurate with an acceptable risk level of *** simulation results have shown that the number of hazardous traces exposed on the slope face can be significantly reduced when the suggested bench face angle is adopted,indicating an extremely low risk of uncontrolled block instabilities.

关键词： Open pit mine Bench face angle Block theory Probabilistic approach Discrete fracture network modeling Fractured rock slope

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Dalian Institute of Chemical Physics, Chinese Academy of Sciences

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National Science Review 2019年第4期6卷 843-853页

作者： Zhang, yan zhao, Weijie

Dalian Institute of Chemical Physics(DICP) is a comprehensive chemical-engineering research institute with a strong international reputation, which has made significant contributions to national economic construction, national security and the progress of science and technology(S&T). With the name of the Scientific Research Institute of Dalian University, the history of DICP began on 19 March 1949. Since then,

关键词： Chinese Academy of Sciences Dalian Institute of Chemical Physics

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Teleportation of Unknown Atomic Entangled States Using GHZ Class States

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Communications in Theoretical Physics 2008年第3期49卷 639-642页

作者： zhao yan Department of Physics Anhui Medical University Hefei 230032 China

We propose two physical schemes, which can teleport unknown atomic entangled states from user A （Alice） to user B （Bob） via GHZ class states as quantum channel The two schemes are both based on cavity QED techniques. In the two schemes, teleportation and distillation procedures can be realized simultaneously. The second teleportation scheme is more advantageous than the first one.

关键词： teleportation unknown atomic entangled states cavity QED technique GHZ class state detuned interaction strong classical driving field

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