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Journal of Rare Earths 2004年第Z1期22卷 84-86页

作者： jiang liping Sch. of Mat. and Metall. Northeast Univ. Shenyang 110004 China Baotou Res. Inst. of Rare Earth Baotou 014010 China

The effect of addition of Al on crystal structure microtexture and magnetostriction coefficient in Tb0.3Dy0.7Fe1.95 alloy were studied. The results show that addition of Al does not change crystal structure of alloy and the precipitates increase in the microtexture as addition of Al increases. At a certain magnetic field, magnetostriction coefficient changed with addition of Al. when magnetic field was smaller than 40 kA·m-1, there was a peak in magnetostriction coefficient as addition of Al increased. When magnetic fields was higher than 40 kA·m-1, magnetostriction coefficient decreased as addition of Al increased.

关键词： Magnetostriction Microtexture Rare earths Tb-Dy-Fe alloy

Effects of Magnetic Heat Treatment on Magnetostiction Properties of Tb0.3 Dy0.7 Fe1.95 Alloy

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Journal of Rare Earths 2004年第Z1期22卷 87-89页

作者： jiang liping Sch. of Mat. and Metall. Northeast Univ. Shenyang 110004 China Baotou Res. Inst. of Rare Earths Baotou 014010 China

The effects of magnetic heat treatment on magnetostriction properties of Tb0.3Dy0.7Fe1.95 alloy were investigated. The directionally solidified alloy was heated to various temperatures near Curie temperature TC in vacuum, kept for a certain time under the application of magnetic field and then cooled to room temperature. The magnetostriction coefficient was measured by a resistance strain gage. The crystal structure was analyzed by X-ray diffraction (XRD). The experimental results show that the magnetostriction coefficient obviously increases and the grains orientations along the axis changed somewhat as the field of 1 T vertical to axis of the rod-shaped specimen is applied for 5 min at the heating temperature slightly lower than TC.

关键词： Magnetic heat treatment Magnetic material Magnetostriction Rare earths Tb-Dy-Fe alloy

Bio-inspired smart gating nanochannels based on polymer films

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Science China Chemistry 2011年第10期54卷 1537-1546页

作者： WEN liping jiang Lei Center for Molecular Science Institute of Chemistry Chinese Academy of Sciences Beo'ing 100190 China

In this review we have summarized some recent results mainly reported by our group that focused on the development of smart gating nanochannels based on polymer films. These nanochannels were prepared using a track-etch process. The responsive materials/molecules and modification methods/techniques have also been demonstrated, from which we have obtained a series of smart gating nanochannels that can respond to single/dual external stimuli, e.g., pH, ion, temperature, light, and so on. These studies utilize responsive behaviors to regulate ionic transport properties inside a single nanochannel and demonstrate the fea-sibility of designing other smart nanodevices in the future.

关键词： bio-inspired smart gating stimuli-responsive nanochannel polymer films

Best linear unbiased estimation algorithm with Doppler measurements in spherical coordinates

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Journal of Systems Engineering and Electronics 2016年第1期27卷 128-139页

作者： Wei Wang Dan Li liping jiang School of Science Naval University of Engineering School of Science Wuhan University of Technology

In an active radar-tracking system,the target-motion model is usually modeled in the Cartesian coordinates,while the radar measurement usually is obtained in polar/spherical *** the target-tracking problem in the Cartesian coordinates becomes a nonlinear state estimation problem.A number of measurement-conversion techniques,which are based on position measurements,are widely used such that the Kalman filter can be used in the Cartesian ***,they have fundamental limitations to result in filtering performance *** fact,in addition to position measurements,the Doppler measurement or range rate,containing information of target velocity,has the potential capability to improve the tracking performance.A filter is proposed that can use converted Doppler measurements（*** product of the range measurements and Doppler measurements） in the Cartesian *** novel filter is theoretically optimal in the rule of the best linear unbiased estimation among all linear unbiased filters in the Cartesian coordinates,and is free of the fundamental limitations of the measurement-conversion *** on simulation experiments,an approximate,recursive implementation of the novel filter is compared with those obtained by four state-of-the-art conversion techniques *** results demonstrate the effectiveness of the proposed filter.

关键词： target tracking radar tracking state estimation converted measurement.

Crystal formation and growth mechanism of inorganic nanomaterials in sonochemical syntheses

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Science China Chemistry 2012年第11期55卷 2292-2310页

作者： GENG Jun jiang liping ZHU JunJie State Key Laboratory of Analytical Chemistry for Life Science School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210093China Department of Chemtstry Jiangsu Institute of EducationNanjing 210013China

A clear understanding of the nucleation, growth, coarsening, the preparation of highly controlled nanostructures. Among and aggregation processes of nanomaterials is necessary to enable wet chemical synthetic methods, ultrasound-assisted preparation has become an important tool in material science. The formation and crystal growth mechanism under ultrasound is special compared with other wet chemical synthetic routes. In this review, we discussed the chemical and physical effect of ultrasound and summarized the ultrasonic effect on crystallization. The sonolysis of water and the cavitation-induced microjet impact and shockwave are the two key factors in the sonochemieal formation of inorganic nanomaterials. The ultrasonic-assisted Ostwald ripening and oriented attachment processes have been reviewed for the possible crystal growth mechanisms in the fabrication of inorganic nanostructures.

关键词： nanoparticles nanocrystalline synthesis sonochemistry crystal growth formation mechanism

Energy Efficient Forwarding Algorithm in Opportunistic Networks

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Chinese Journal of Electronics 2016年第5期25卷 957-964页

作者： ZHANG Feng WANG Xiaoming jiang liping ZHANG Lichen Ministry of Education Key Laboratory for Modern Teaching Technology Shaanxi Normal University School of Computer Science Shaanxi Normal University

In opportunistic networks, a successful message transmission between node pairs depends on the message size, the transmission speed and the connection duration time. This paper proposes a new message forwarding algorithm to improve the message delivery ratio and reduce the energy consumption. Previous encounter characteristics between nodes are used to estimate future connection duration time using a three point estimation method. Furthermore, the buffer utilization of nodes is used as a weight for the likelihoods to meet destinations according to the hop count of messages stored in the *** simulation results show that the proposed forwarding algorithm achieves higher delivery ratio and less overhead ratio than the other four popular routing *** addition, the proposed algorithm gains a better average residual energy performance among all the compared protocols.

关键词： Opportunistic networks Forwarding algorithm Connection duration time Hop count Buffer management

Sonochemical Synthesis of Two Dimensional C3N4 Nanosheets Supported Palladium Composites and Their Electrocatalytic Activity for Oxygen Reduction and Methanol Oxidation Reaction

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Chinese Journal of Chemistry 2017年第6期35卷 969-976页

作者： Lingxia Zuo liping jiang Jun-Jie Zhu State Key Laboratory of Analytical Chemistry for Life Science School of Chemistry and Chemical Engineering Nanjing University Nanjing Jiangsu 210093 China

The preparation of highly active electrocatalysts with good durability and low cost for fuel cells is highly desir- able but still remains a significant challenge. Here we synthesized two dimensional （2D） C3N4 nanosheets supported palladium composites （C3N4/Pd） via a simple and convenient sonochemical approach. We have systematically stud- ied the electrocatalytic performance of as-prepared catalysts. We found that the prepared C3N4/Pd composites pos- sessed excellent catalytic activity and stability for oxygen reduction reaction （ORR） in alkaline media. Encourag- ingly, the C3N4/Pd catalysts exhibit the excellent electrocatalytic activity for methanol oxidation reaction （MOR） in alkaline media, even better than that of the commercial Pt/C catalyst, The excellent electrocatalytic performance of the 2D C3N4 nanosheets supported palladium composites catalysts results from their synergy effect between the ul- trathin substrate material with large surface area and excellent dispersion of palladium nanoparticles. This study demonstrates that sonochemical method opens up a new avenue for the preparation of electrocatalysts for fuel cells. We expect these materials are likely to find uses in a broad range of applications, for example, fuel cells, solar cells, batteries and other electrochemical analysis.

关键词： sonochemical method C3N4/Pd oxygen reduction reaction methanol oxidation reaction

Effect of tillage state of paddy soils with heavy metal pollution on the nosZ gene of N_(2)O reductase

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Journal of Environmental Sciences 2024年第3期137卷 469-477页

作者： liping jiang Shiguang Liu Shanyun Wang Libo Sun Guibing Zhu Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China School of Environmental and Civil Engineering Jiangnan UniversityWuxi 214122China

Paddy soils are an important source of atmospheric nitrous oxide(N_(2)O).However,numerous studies have focused on N_(2)O production during the soil tillage period,neglecting the N_(2)O production during the dry fallow *** this study,we conducted an incubation experiment using the acetylene inhibition technique to investigate N_(2)O emission and reduction rates of paddy soil profiles(0-1 m)from Guangdong Province and Jinlin Province in China,with different heavy-metal pollution *** abundance and community structures of denitrifying bacteria were determined via quantitative-PCR and Illumina MiSeq sequencing of nosZ,nirK,and nirS *** results showed that the potential N_(2)O emission rate,N_(2)O production rate,and denitrification rate have decreased with increasing soil vertical depth and heavy-metal *** importantly,we found that the functional gene type of N_(2)O reductase switched with the tillage state of paddy soils,which cladeⅡnos Z genes were the dominant gene during the tillage period,while cladeⅠnos Z genes were the dominant gene during the dry fallow *** heavy-metal pollution has less effect on the niche differentiation of the nos Z *** N_(2)O emission rate was significantly regulated by the genus Bradyhizobium,which contains both N_(2)O reductase and nitrite reductase *** findings suggests that the nos Z gene of N_(2)O reductase can significantly impact the N_(2)O emission from paddy soils.

关键词： Pappy soils N_(2)O reductase nosZ gene Heavy-metal pollution

Preparation of the glucose sensor based on three-dimensional ordered macroporous gold film and room temperature ionic liquid

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Science China Chemistry 2009年第11期52卷 1999-2005页

作者： CHEN XiaoJun XUAN Jie jiang liping ZHU JunJie Key Lab of Analytical Chemistry for Life Science(MOE) School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210093China College of Sciences Nanjing University of TechnologyNanjing 210009China

A novel type of glucose sensor was fabricated based on a glucose oxidase(GOD)-N,N-dimethtylformamide(DMF)-[BMIm][BF4] composites modified three-dimensional ordered macroporous(3DOM) gold film *** immobilized GOD exhibits a pair of well-defined reversible peaks in 50 mM pH 7.0 phosphate buffer solutions(PBS),which could be attributed to the redox of flavin adenine dinucleotide(FAD) in *** research results show that ionic liquid([BMIm][BF4]),DMF and 3DOM gold film are crucial for GOD to exhibit a pair of stable and reversible *** is believed that the large active area of 3DOM gold film can increase the amount of immobilized ***,the application of IL enhances the stability of GOD and facilitates the electron transfer between GOD and the *** synergetic effect of DMF can help the GOD to maintain its bioactivity *** immobilized on the electrode exhibits the favorable electrocatalytic property to glucose,and the prepared sensor has a linear range from 10 to 125 nM with a detection limit of 3.3 nM at a signal-to-noise ratio of 3σ.The apparent Km(Michaelis-Menten constant) for the enzymatic reaction is 0.018 mM.

关键词： ionic liquid glucose oxidase three-dimensional ordered macroporous gold film direct electrochemistry electrochemical catalysis

Fiber orientation effects on grinding characteristics and removal mechanism of 2.5D C_(f)/SiC composites

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Chinese Journal of Aeronautics 2023年第12期36卷 425-441页

作者： Cheng CAO Qinghua SONG Hui FU Hansong JI Zhanqiang LIU liping jiang Key Laboratory of High Efficiency and Clean Mechanical Manufacture Ministry of EducationSchool of Mechanical EngineeringShandong UniversityJinan 250061China National Demonstration Center for Experimental Mechanical Engineering Education Shandong UniversityJinan 250061China Shandong Industrial Ceramic Research&Design Institute Zibo 255020China

Carbon fiber reinforced silicon carbide(C_(f)/SiC)composites are widely used in aerospace for their excellent mechanical ***,the quality of the machined surface is poor and unpredictable due to the material heterogeneity induced by complex removal *** clarify the effects of fiber orientation on the grinding characteristics and removal mechanism,single grit scratch experiments under different fiber orientations are conducted and a three-phase numerical modelling method for 2.5D C_(f)/SiC composites is *** fiber cutting modes i.e.,transverse,normal and longitudinal,are defined by fiber orientation and three machining directions i.e.,MA(longitudinal and normal),MB(longitudinal and transverse)and MC(normal and transverse),are selected to investigate the effect of fiber orientation on grinding force and ***,a three-phase cutting model of 2.5D C_(f)/SiC composites considering the mechanical properties of the matrix,fiber and interface is *** simulations are performed to reveal the micro-mechanism of crack initiation and extension as well as the material removal mechanism under different fiber *** results indicate that the scratching forces fluctuate periodically,and the order of mean forces is MA>MC>*** tend to grow along the fiber axis,which results in the largest damage layer for transverse fibers and the smallest for longitudinal *** removal modes of transverse fibers are worn,fracture and peel-off,in which normal fibers are pullout and outcrop and the longitudinal fibers are worn and *** the stable cutting condition,the change of contact area between fiber and grit leads to different removal modes of fiber in the same cutting mode,and the increase of contact area results in the aggravation of fiber fracture.

关键词： 2.5D C_(f)/SiC composites Material removal mechanism Numerical modelling Single grit scratch experiments Surface morphology