检索结果-南通市图书馆

Journal of Environmental Sciences 2021年第4期33卷 64-73页

作者： Qingxiang zhou Yalin Wu Yi Sun Xueying Sheng Yayan Tong Jinghan Guo boyao zhou Jingyi Zhao State Key Laboratory of Heavy Oil Processing China University of Petroleum-BeijingBeijing 102249China Beijing Municipal Research Institute of Environmental Protection Beijing 100037China

Organochlorine pesticides(OCPs)have received much attention due to their *** methods to monitor their residues in the environment are ***,magnetic polyamidoamine dendrimers were prepared by co-precipitation,Michael addition,and *** magnetic polyamidoamine dendrimers demonstrated good adsorption ability for OCPs—this feature was utilized to construct a sensitive tool for monitoring OCPs in water *** proposed method provided remarkable linearity from 0.1 to 500μg/L and satisfactory limits of detection from 0.012 to 0.029μg/*** spiked recoveries of the four target analytes were 91.8%-103.5%with relative standard deviations less than 4.5%.The magnetic materials had good *** results indicated that the resulting method was an efficient,easy,rapid,economical,and eco-friendly tool for monitoring OCPs in aqueous samples.

关键词： Organochlorine pesticides Magnetic PAMAM dendrimers Fe_(3)O_(4)nanoparticles

基于西门子S7-1200 Modbus通信协议的应用

在线全文

学校读者我要写书评

暂无评论

通信电源技术 2022年第13期39卷 121-123页

作者：周博遥九江赛晶科技股份有限公司江西九江332000

针对西门子公司新推出的S7-1200 PLC,介绍其实现与第三方设备的Modbus通信过程。根据工业自动化现场通信过程中所需满足的实时性、可靠性等要求,提出部分优化方案。方案探讨了基于Modbus协议多站点通信的调度策略、调度优先级、数据访... 详细信息

针对西门子公司新推出的S7-1200 PLC,介绍其实现与第三方设备的Modbus通信过程。根据工业自动化现场通信过程中所需满足的实时性、可靠性等要求,提出部分优化方案。方案探讨了基于Modbus协议多站点通信的调度策略、调度优先级、数据访问读写策略及读写策略的优化方向等问题,并对Modbus协议在工业自动化领域应用的优缺点进行了深入探讨。

关键词： S7-1200 Modbus通信通信调度

Recent advances in nanoporous graphene membrane for gas separation and water purification

维普期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Science Bulletin 2015年第21期60卷 1807-1823页

作者： Chengzhen Sun boyao Wen Bofeng Bai State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong University

Graphene is a one-atom-thick sheet of graphite comprising sp2-hybridized carbon atoms arranged in the hexagonal honeycomb lattices. By removing the honeycomb lattices and forming nanopores with specific geometry and size, nanoporous graphene has been demonstrated as a very high-efficiency separation membrane, due to the ultrafast molecular permeation rate for its one-atom thickness. This review focuses on the recent advances in nanoporous graphene membrane for the applications of gas separation and water purification, with a major emphasis on the molecular permeation mechanisms and the advanced fabrication methods of this state-of-the-art membrane. We highlight the advanced theoretical and experimental works and discuss the gas/water molecular transport mechanisms through the graphene nanopores accompanied with theoretical models. In addition, we summarize some representative membrane fabrication methods, covering the graphene transfer to porous substrates and the pore generation. We anticipate that this review can provide a platform for understanding the current challenges to make the conceptual membrane a reality and attracting more and more attentions from scientists and engineers.

关键词： Nanoporous graphene Gas separationWater purification Molecular permeationmechanism Membrane fabrication

A co-activation strategy for enhancing the performance of hematite in photoelectrochemical water oxidation

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2021年第7期32卷 2279-2282页

作者： boyao Xie Xingming Ning Shuoming Wei Jia Liu Jimei Zhang Xiaoquan Lu Tianjin Key Laboratory of Molecular Optoelectronic Science Department of ChemistrySchool of ScienceTianjin UniversityTianjin 300072China State Key Laboratory of Separation Membranes and Membrane Processes School of Chemistry and Chemical EngineeringTiangong UniversityTianjin 300387China

Hematite(α-Fe_(2)O_(3))is a promising photoanode for photoelectrochemical(PEC)water ***,the severe charge recombination and sluggish water oxidation kinetics extremely limit its use in photohydrogen ***,a co-activation strategy is proposed,namely through phosphorus(P)doping and the loading of CoAl-layered double hydroxides(CoAl-LDHs)***,the integrated system,CoAl-LDHs/P-Fe_(2)O_(3) photoanode,exhibits an outstanding photocurrent density of 1.56 mA/cm^(2) at 1.23 V(*** hydrogen electrode,RHE),under AM 1.5 G,which is 2.6 times of pureα-Fe_(2)O_(3).Systematic studies reveal that the remarkable PEC performance is attributed to accelerated surface OER kinetics and enhanced carrier separation *** work provides a feasible strategy to enhance the PEC performance of hematite photoanodes.

关键词： Photoelectrochemical Phosphorus doping Charge separation CoAl-LDHs Hematite

REGULAR EXPRESSION OF DISCOIDIN DOMAIN RECEPTOR 2 IN THE IMPROVED ADJUVANT-INDUCED ANIMAL MODEL FOR RHEUMATOID ARTHRITIS

在线全文

学校读者我要写书评

暂无评论

Chinese Medical Sciences Journal 2005年第2期20卷 133-137,页

作者： WeiLi Yuan-qiangZhang Xin-pingLiu Li-boyao LanSun DepartmentofHistologyandEmbryology DepartmentofBiochemistryandMolecularBiology theFourthMilitaryUniversityXi＇an710032

Objective To investigate the expression of discoidin domain receptor 2 (DDR2) of fibroblast-like synovial cells in im- proved adjuvant-induced animal (AIA) model for rheumatoid arthritis (RA) and to provide evidence for DDR2’s antagonist use clinically. Methods AIA was modified by administrating 0.1 mL of complete Freund’s adjuvant (CFA, mixed with 5 mg Bacillus Calmette-Guerin vaccine/mL) into rats’ right hind paws and 0.125 mL tumor necrosis factor-α (2 U/mL) into right ankles and subpatellar fatty tissue. The expression of DDR2 in fibroblast-like synovial cells was assessed using immunohistochemistry, immunofluorescence histochemistry, and in situ hybridization methods. Levels of anti-collagen II antibody were measured using enzyme-linked immunosorbent assay. Results Given the terms mentioned above, we found a more practical rat model, apparently decreasing immunization time (average 3-5 days). DDR2 can be detected upon the 15th day of immunization; expression gradually increased with time going on, and reaching a peak 35 days after immunization before gradually decreasing. Serum anti-collagen II antibody showed similar expression patterns as DDR2, but reached peak later than DDR2, about 40 days after immunization. Conclusion Regular expression of DDR2 in animal models infers its important role in the pathological process of RA.

关键词： rheumatoid arthritis adjuvant-induced arthritis discoidin domain receptor 2 synovial tissue anti-collagen Ⅱ antibody

***:A Julia package for micromagnetic and atomistic simulations with GPU support

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2024年第10期33卷 70-79页

作者： Weiwei Wang boyao Lyu Lingyao Kong Hans Fangohr Haifeng Du Institutes of Physical Science and Information Technology Anhui UniversityHefei 230601China Anhui Province Key Laboratory of Low-Energy Quantum Materials and Devices High Magnetic Field LaboratoryHFIPSChinese Academy of SciencesHefei 230031China University of Science and Technology of China Hefei 230031China School of Physics and Optoelectronic Engineering Anhui UniversityHefei 230601China University of Southampton Southampton SO171BJUnited Kingdom

*** is an open-source Julia package for micromagnetic and atomistic *** the features of the Julia programming language,*** supports CPU and various GPU platforms,including NVIDIA,AMD,Intel,and Apple ***,*** supports Monte Carlo simulations for atomistic models and implements the nudged-elastic-band method for energy barrier *** built-in support for double and single precision modes and a design allowing easy extensibility to add new features,*** provides a versatile toolset for researchers in micromagnetics and atomistic simulations.

关键词： micromagnetic simulations atomistic simulations graphics processing units

Tree allometry responses to competition and complementarity in mixed-species plantations of Betula alnoides

在线全文

学校读者我要写书评

暂无评论

Forest Ecosystems 2024年第4期11卷 469-479页

作者： boyao Chen Kaili Liu Chunsheng Wang Junjie Guo Junkun Lu Lin Chen Zhigang Zhao Jie Zeng Research Institute of Tropical Forestry Chinese Academy of ForestryGuangzhou510520China Central South University of Forestry&Technology Changsha410004China Experimental Center of Tropical Forestry Chinese Academy of ForestryPingxiang532600China Nanjing Forestry University Nanjing210037China

Tree allometry plays a crucial role in tree survival,stability,and timber quantity and quality of mixed-species ***,the responses of tree allometry to resource utilisation within the framework of interspecific competition and complementarity remain poorly *** into consideration strong-and weakspace competition(SC and WC),as well as N_(2)-fixing and non-N_(2)-fixing tree species(FN and nFN),a mixedspecies planting trial was conducted for Betula alnoides,a pioneer tree species,which was separately mixed with Acacia melanoxylon(SC+FN),Erythrophleum fordii(WC+FN),Eucalyptus cloeziana(SC+nFN)and Pinus kesiya ***(WC+nFN)in southern *** years after planting,tree growth,total nitrogen(N)and carbon(C)contents,and the natural abundances of^(15)N and^(13)C in the leaves were measured for each species,and the mycorrhizal colonisation rates of *** were investigated under each *** variations and their relationships with space competition and nutrient-related factors were *** results showed a consistent effect of space competition on the height-diameter relationship of *** in mixtures with FN or *** tree height growth of *** was significantly promoted under high space competition,and growth in diameter at breast height(DBH),tree height and crown size were all expedited in mixtures with *** symbiotic relationship between ectomycorrhizal fungi and *** was significantly influenced by both space competition and N_(2) fixation by the accompanying tree species,whereas such significant effects were absent for arbuscular mycorrhizal ***,high space competition significantly decreased the water use efficiency(WUE)of ***,and its N use efficiency(NUE)was much lower in the FN *** equation modeling further demonstrated that the stem allometry of *** was affected by its NUE and WUE via changes in its height growth,and crown allometry was influ

关键词： Allometric relationship Resources competition and complementarity Mixed-species forest Tree-fungal symbiotic relationship N_2-fixing tree species Resource utilisation strategies

Recent advances in two-dimensional layered and non-layered materials hybrid heterostructures

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2022年第10期31卷 231-246页

作者： Haixin Ma Yanhui Xing boyao Cui Jun Han Binghui Wang Zhongming Zeng Key Laboratory of Opto-electronics Technology Ministry of EducationCollege of MicroelectronicsBeijing University of TechnologyBeijing 100124China Key Laboratory of Nanodevices and Applications Suzhou Institute of Nano-tech and Nano-bionicsChinese Academy of SciencesSuzhou 215123China Nanchang Nano-Devices and Technologies Division Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesNanchang 330200China

With the development of Moore's law, the future trend of devices will inevitably be shrinking and integration to further achieve size reduction. The emergence of new two-dimensional non-layered materials(2DNLMs) not only enriches the 2D material family to meet future development, but also stimulates the global enthusiasm for basic research and application technologies in the 2D field. Van der Waals(vd W) heterostructures, in which two-dimensional layered materials(2DLMs)are physically stacked layer by layer, can also occur between 2DLMs and 2DNLMs hybrid heterostructures, providing an alternative platform for nanoelectronics and optoelectronic applications. Here, we outline the recent developments of2DLMs/2DNLMs hybrid heterostructures, with particular emphasis on major advances in synthetic methods and applications. And the categories and crystal structures of 2DLMs and 2DNLMs are also shown. We highlight some promising applications of the heterostructures in electronics, optoelectronics, and catalysis. Finally, we provide conclusions and future prospects in the 2D materials field.

关键词： 2D layered materials 2D non-layered materials van der Waals heterostructure applications

Comparison of the modified Wiltse’s approach with spinal minimally invasive system and traditional approach for the therapy of thoracolumbar fracture

在线全文

学校读者我要写书评

暂无评论

The Journal of Biomedical Research 2020年第5期34卷 379-386页

作者： Jie Chang Jiang Cao Ziyan Huang boyao Wang Tao Sui Xiaojian Cao Department of Orthopedics the First Affiliated Hospital of Nanjing Medical UniversityNanjingJiangsu 210029China

Thoracolumbar fractures are usually treated by open posterior pedicle screw ***,this procedure involves massive paraspinal muscle stripping,inflicting surgical trauma,and prolonged X-ray *** this study,we observed 127 patients with single-segment injury thoracolumbar ***-six patients were treated by the modified Wiltse’s paraspinal approach with minimally invasive channel system,while 91 patients were treated via traditional posterior *** time,intraoperative blood loss,intraoperative fluoroscopy frequency,screw placement accuracy,visual analogue scale score,and Cobb’s angle of two groups were *** X-ray exposure times were notably reduced(4.2±1.6) in the new approach group(P<0.05).The pedicle screw placement accuracy and Cobb’s angle after surgery were similar in the two *** conclude that modified Wiltse’s paraspinal approach w ith spinal minimally invasive channel system surgery can significantly reduce the X-ray exposure times and is an alternative therapy for the thoracolumbar fracture.

关键词： thoracolumbar fracture Wiltse’s paraspinal approach spinal minimally invasive channel system

Three-dimensional magnetization reconstruction from electron optical phase images with physical constraints

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2024年第11期67卷 122-132页

作者： boyao Lyu Shihua Zhao Yibo Zhang Weiwei Wang Fengshan Zheng Rafal E.Dunin-Borkowski Jiadong Zang Haifeng Du Anhui Province Key Laboratory of Low-Energy Quantum Materials and Devices High Magnetic Field LaboratoryHefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China Science Island Branch Graduate School of University of Science and Technology of ChinaHefei 230026China Department of Physics and Astronomy University of New HampshireDurham 03824USA Department of Physics The City College of New YorkNew York 10031USA Physics Program Graduate Center of the City University of New YorkNew York 10016USA Department of Chemistry University of New HampshireDurham 03824USA Institutes of Physical Science and Information Technology Anhui UniversityHefei 230601China Spin-X Institute Center for Electron MicroscopySchool of Physics and OptoelectronicsState Key Laboratory of Luminescent Materials and DevicesGuangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional MaterialsSouth China University of TechnologyGuangzhou 511442China Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons Forschungszentrum JülichJülich 52425Germany

The ability to characterize three-dimensional(3D)magnetization distributions in nanoscale magnetic materials and devices is essential to fully understand their static and dynamic magnetic *** contrast techniques in the transmission electron microscope(TEM),such as electron holography and electron ptychography,can be used to record two-dimensional(2D)projections of the in-plane magnetic induction of 3D nanoscale *** the 3D magnetic induction can in principle be reconstructed from one or more tilt series of such 2D projections,conventional tomographic reconstruction algorithms do not recover the 3D magnetization within a sample ***,we use simulations to describe the basis of an improved model-based algorithm for the tomographic reconstruction of a 3D magnetization distribution from one or more tilt series of electron optical phase images recorded in the *** algorithm allows a wide range of physical constraints,including a priori information about the sample geometry and magnetic parameters,to be *** also makes use of minimization of the micromagnetic energy in the loss *** demonstrate the reconstruction of the 3D magnetization of a localized magnetic soliton—a hopfion ring—and discuss the influence of noise,choice of magnetic constants,maximum tilt angle and number of tilt axes on the *** algorithm can in principle be adapted for other magnetic contrast imaging techniques in the TEM,as well as for other magnetic characterization techniques,such as those based on X-rays or neutrons.

关键词： three-dimensional magnetization vector field tomography differentiable programming electron holography micromagnetism