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Journal of Wuhan University of Technology(Materials Science) 2020年第2期35卷 384-392页

作者： zhu xinhua JIA Xuhong College of Civil Aviation Safety Engineering Civil Aviation Flight University of ChinaGuanghan 618307China

The products of monoammonium phosphate containing Cr^3+resulted in disqualification,and further posed a serious threat to ecological environment and human ***,the porous adsorbent of fluor(calcium silicate)composites(FCSc)was prepared by hydrothermal method using diatomaceous earth,hydrated lime and additive(NaF)as raw materials,which was characterized and used for the removal of Cr^3+from monoammonium phosphate *** effects of different parameters,such as solution pH,initial Cr^3+concentration,temperature and contact time on the adsorption of Cr^3+onto FCSc were investigated in *** results indicated that the adsorption process was in agreement with the pseudo-second-order kinetic model and Freundlich *** spontaneous and endothermic nature of the adsorption process was obtained by analyzing various thermodynamic parameters(△G0,△H0,and△S0).In addition,computational monte carlo simulations between Cr3+ions and FCSc were conducted to elucidate the adsorption *** kind of porous adsorbent provided a potential application in the removal of impurities from monoammonium phosphate industry.

关键词： fluor(calcium silicate)composites monoammonium phosphate solutions chromium(Ⅲ) removal monte carlo simulations

Low-cost portable dielectric spectrometer based on mini-vector network analyzer and open-ended coaxial probe technology

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International Journal of Agricultural and Biological Engineering 2024年第3期17卷 166-172页

作者： zhuozhuo zhu xinhua zhu Wenchuan Guo College of Mechanical and Electronic Engineering Northwest A&F UniversityYangling 712100ShaanxiChina School of Physics and Electronic Information Yan'an UniversityYan'an 716000ShaanxiChina Shaanxi Research Center of Agricultural Equipment Engineering Technology Yangling 712100ShaanxiChina Key Laboratory of Agricultural Internet of Things Ministry of Agriculture and Rural AffairsYangling 712100ShaanxiChina Shaanxi Key Laboratory of Agricultural Information Perception and Intelligent Service Yangling 712100ShaanxiChina

As a simple,fast,and non-destructive measuring technology,dielectric spectroscopy is usually used to analyze the dielectric properties of agricultural products and food,and then to predict the main components of ***,the large and expensive vector network analyzers(VNA)with expensive analysis software applied in measuring dielectric properties make research limited to the *** acquire dielectric spectra in situ,a model for solving relative complex permittivity was derived,and its performance was ***,a low-cost portable dielectric spectrometer with a mini VNA,a Raspberry Pi,and a coaxial probe as core parts was developed over the frequency range of 100-3000 *** stability and accuracy of the developed spectrometer were tested using milk and *** results indicated that the relative errors of the model were within±5%for dielectric constant(ε′)and loss factor(ε″).The coefficients of variation of measuredε′andε″by the developed spectrometer at 100-3000 MHz were less than 1%and 2%,*** with the dielectric properties obtained by using a commercial dielectric measurement system,the relative errors of measuredε′andε″were within±3.4%and±6.0%,*** study makes fast,non-destructive,and on-site food quality detection using dielectric spectra possible.

关键词： coaxial probe mini vector network analyzer low-cost portable dielectric spectrometer

Recent progress in molten salt synthesis of low-dimensional perovskite oxide nanostructures, structural characterization,properties, and functional applications: A review

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Journal of Materials Science & Technology 2018年第6期34卷 914-930页

作者： Piaojie Xue Heng Wu Yao Lu xinhua zhu National Laboratory of Solid State Microstructures School of Physics Nanjing University

Molten salt synthesis （MSS） method has advantages of the simplicity in the process equipment, versatile and large-scale synthesis, and friendly environment, which provides an excellent approach to synthesize high pure oxide powders with controllable compositions and morphologies. Among these oxides, perovskite oxides with a composition of ABO3 exhibit a broad spectrum of physical properties and functions （e.g. ferroelectric, piezoelectric, magnetic, photovoltaic and photocatalytic properties）. The downscaling of the spatial geometry of perovskite oxides into nanometers result in novel properties that are different from the bulk and film counterparts. Recent interest in nanoscience and nanotechnology has led to great efforts focusing on the synthesis of low-dimensional perovskite oxide nanostructures （PONs） to better understand their novel physical properties at nanoscale. Therefore, the low-dimensional PONs such as perovskite nanoparticles, nanowires, nanorods, nanotubes, nanofibers, nanobelts, and two dimensional oxide nanostructures, play an important role in developing the next generation of oxide electronics. In the past few years, much effort has been made on the synthesis of PONs by MSS method and their structural characterizations. The functional applications of PONs are also explored in the fields of storage memory, energy harvesting, and solar energy conversion. This review summarizes the recent progress in the synthesis of low-dimensional PONs by MSS method and its modified ways. Their structural char- acterization and physical properties are also scrutinized. The potential applications of low-dimensional PONs in different fields such as data memory and storage, energy harvesting, solar energy conversion, are highlighted. Perspectives concerning the future research trends and challenges of low-dimensional PONs are also outlined. ~ 2017 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science ＆ Technology.

关键词： Low-dimensional perovskite nanostructures Molten salt synthesis Structural characterization Physical properties Functional applications

Challenges in Atomic-Scale Characterization of High-k Dielectrics and Metal Gate Electrodes for Advanced CMOS Gate Stacks

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Journal of Materials Science & Technology 2009年第3期25卷 289-313页

作者： xinhua zhu Jian-min zhu Aidong Li Zhiguo Liu Naiben Ming National Laboratory of Solid State Microstructures Department of Physics Nanjing University Nanjing 210093 China

The decreasing feature sizes in complementary metal-oxide semiconductor （CMOS） transistor technology will require the replacement of SiO2 with gate dielectrics that have a high dielectric constant （high-k） because as the SiO2 gate thickness is reduced below 1.4 nm, electron tunnelling effects and high leakage currents occur in SiO2, which present serious obstacles to future device reliability. In recent years significant progress has been made on the screening and selection of high-k gate dielectrics, understanding their physical properties, and their integration into CMOS technology. Now the family of hafnium oxide-based materials has emerged as the leading candidate for high-k gate dielectrics due to their excellent physical properties. It is also realized that the high-k oxides must be implemented in conjunction with metal gate electrodes to get sufficient potential for CMOS continue scaling. In the advanced nanoscale Si-based CMOS devices, the composition and thickness of interfacial layers in the gate stacks determine the critical performance of devices. Therefore, detailed atomic- scale understandings of the microstructures and interfacial structures built in the advanced CMOS gate stacks, are highly required. In this paper, several high-resolution electron, ion, and photon-based techniques currently used to characterize the high-k gate dielectrics and interfaces at atomic-scale, are reviewed. Particularly, we critically review the research progress on the characterization of interface behavior and structural evolution in the high-k gate dielectrics by high-resolution transmission electron microscopy （HRTEM） and the related techniques based on scanning transmission electron microscopy （STEM）, including high-angle annular dark- field （HAADF） imaging （also known as Z-contrast imaging）, electron energy-loss spectroscopy （EELS）, and energy dispersive X-ray spectroscopy （EDS）, due to that HRTEM and STEM have become essential metrology tools for characterizing the d

关键词： High-k gate dielectrics Metal gate electrodes, CMOS gate stack HRTEM STEM

Dynamic Analysis and Optimization of a Solar Car Using FE Method

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上海交通大学学报 2004年第Z2期38卷 166-170页

作者： Liang xinhua zhu Ping Lin Zhongqin Zhang Yan School of Mechanical and Power Energy Engineering Shanghai Jiaotong UniversityShanghai200030 China School of Mechanical and Power Energy Engineering Shanghai Jiaotong UniversityShanghai200030 China School of Mechanical and Power Energy Engineering Shanghai Jiaotong UniversityShanghai200030 China School of Mechanical and Power Energy Engineering Shanghai Jiaotong UniversityShanghai200030 China

As we all know, the design of solar car focuses on lightweight in order to reduce the energy expenditure. However, the lightweight can induce large vibration, particularly in lower frequencies. The vibration not only influences the riding comfort but also cause the fatigue breakage. So the dynamic performance of the solar car must also be taken into account. In this paper, the finite element model of a solar car frame is built, and the modal analysis is also performed. Afterwards,the frequency responses of the frame are analyzed under harmonic load. Finally, some modification is performed on this frame by structure optimization procedure.

关键词： solar car FEA modal analysis dynamic response

Influence of submerged entry nozzle clogging on the behavior of molten steel in continuously cast slab molds

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Journal of University of Science and Technology Beijing 2005年第4期12卷 303-307页

作者： Huixiang Yu Guosen zhu xinhua Wang Jiongming Zhang Wanjun Wang Metallurgical and Ecological Engineering School University of Science and Technology Beijing Beijing 100083 China

The influence of submerged entry nozzle clogging on the behavior of molten steel in continuously cast slab molds was studied using commercial code CFX4.3. The results indicate that clogging at the top part of the nozzle port not only increases the velocity of molten steel, but also enhances the wall shear stress, F number and heat flux. This clogging has the greatest effect on the behavior of molten steel. However, clogging at the top 1/3 of the nozzle only increases the velocity of molten steel and has little influence. Clogging at the bottom of the nozzle almost has no influence.

关键词： clogging submerged entry nozzle mold continuously cast slab numerical simulation

Land institution of China:overall framework,structural evolution,and regulation intensity

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Chinese Journal of Population,Resources and Environment 2018年第1期16卷 85-95页

作者： xinhua zhu Sixuan Lu School of Public Administration Hohai University

China's land institution can be defined broadly or narrowly. By examining the broad definition of the land institution, we found that there were prerequisite, complementary, and substitutional relationships among the various systems. These relationships were verified through discussion of the structural evolution of each system. Based on these relationships, three methods for quantification were used to measure the regulation intensity and intra-provincial differences in each system among 31 provinces, municipalities, and autonomous regions in China in 2014. The statistics analysis shows that provinces used to pursue outstanding performances in land institution but few provinces could outperform the other provinces in all types of systems. The statistics results also indicate that the provinces which executed land institution earlier often hold significant advantages in institutional innovations but it is still not clear whether they can maintain the advantages. This study recommends that the Chinese government should improve the overall framework of regional land institution based on land systems' relationships and evolutionary patterns. Furthermore, the government should optimize the spatial distribution of regional land institution based on the intra-provincial differences in land-regulation intensity.

关键词： Land system regulation intensity structural evolution China

Structural,spectroscopic,and dielectric characterizations of Mn-doped 0.67BiFeO_(3)-0.33BaTiO_(3)multiferroic ceramics

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Journal of Advanced Ceramics 2013年第3期2卷 252-259页

作者： Qiming HANG Wenke ZHOU xinhua zhu Jianmin zhu Zhiguo LIU Talaat AL-KASSAB National Laboratory of Solid State Microstructures School of PhysicsNanjing UniversityNanjing 210093China National Laboratory of Solid State Microstructures Department of Materials Science and EngineeringNanjing UniversityNanjing 210093China King Abdullah University of Science&Technology(KAUST) Physical Sci.and Eng.Thuwal 23955-6900Kingdom of Saudi Arabia

0.67BiFeO_(3)-0.33BaTiO_(3)multiferroic ceramics doped with x mol%MnO_(2)(x=2-10)were synthesized by solid-state *** formation of a perovskite phase with rhombohedral symmetry was confirmed by X-ray diffraction(XRD).The average grain sizes were reduced from 0.80mm to 0.50mm as increasing the Mn-doped *** crystalline nature of the grains was revealed by high-resolution transmission electron microscopy(HRTEM)images and electron diffraction *** nano-sized ferroelectric domains with an average size of 9 nm randomly distributed in the ceramic samples were revealed by TEM *** domain lamellae(71°ferroelectric domains)with an average width of 5 nm were also *** modes were examined by Raman spectra,where only four Raman peaks at 272 cm^(-1)(E-4 mode),496 cm^(-1)(A_(1)-4 mode),639 cm^(-1),and 1338 cm^(-1)were *** blue shifts in the E-4 and A_(1)-4 Raman mode frequencies were interpreted by a spring oscillator *** dieletric constants of the present ceramics as a function of the Mn-doped levels exhibited a V-typed *** were in the range of 350-700 measured at 10^(3)Hz,and the corresponding dielectric losses were in range of 0.43-0.96,approaching to 0.09 at 10^(6)Hz.

关键词： multiferroic ceramics dielectric properties Raman spectra microstructure

Design and test of the bilateral throwing soil-covering device for straw mulching machine in orchards

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International Journal of Agricultural and Biological Engineering 2023年第1期16卷 162-171页

作者： xinhua zhu Xiang Gao Xudong Li Shaojie Xu College of Mechanical and Electronic Engineering Northwest A&F UniversityYangling 712100ShaanxiChina Weichai Lovol Heavy Industry Co. Ltd.Weifang 261200ShandongChina

Aiming to lack the function of soil covering in the developed orchard straw mulching machine(OSM),a kind of bilateral counter-throwing soil-covering device was developed to eliminate the orchard fire risk caused by the straw *** soil-covering device was suspended at the rear of the *** core component was a pair of throwing wheels installed on both sides of a *** motors drove the throwing wheels to take soil on-site and cover the straw *** adjustment range of the space between the throwing wheels on both sides was 1.4-2.1 *** on the analysis of soil-covering quantity,soil-covering width,thickness uniformity of soil layer,and power consumption,the key parameters such as the radius,the number of the vane,and the minimum rotation speed of the throwing wheels were *** was proved that the thickness uniformity of the soil layer by bilateral counter-throwing was better than by unilateral,and bottom throwing was better than top *** blade of the soil cutter consisted of a straight blade and a curved blade,and the sliding-cutting angle was 14°-40°.The field test results showed the soil-covering device had good performance with a width of 1.4-2.2 m,a thickness of the soil-covering layer(TSL)of 23.2-40.7 mm,a standard deviation(SD)of 1.4-2.9 mm,width uniformity of 100%,and leakage rate of *** established model,between the thickness of soil-covering layer and trenching depth,throwing angle,and rotation speed of the throwing wheels,has a determination coefficient of 0.9757 and can be used to guide the operating *** soil cutter reduced the power consumption and impact load of the throwing wheels by 64.77%and 60.88%,*** work provides a type of new equipment for the mechanization technology of straw mulching in arid and semi-arid orchards.

关键词： orchard straw mulching mechanization soil-covering device counter-throwing uniformity

Extracting the time delay signature of coupled optical chaotic systems by mutual statistical analysis

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Frontiers of Optoelectronics 2017年第4期10卷 378-387页

作者： xinhua zhu Mengfan CHENG Lei DENG Xingxing JIANG. Deming LIU Next Generation Internet Access National Engineering Laboratory (NGIA) School of Optical and Electronic Information Huazhong University of Science and Technology Wuhan 430074 China

The time delay （TD） signature is a critical parameter in optical chaos-based applications. The feasi- bility of extracting the TD has been a crucial issue that significantly influences the performance of these applica- tions. In this paper, statistical analyses have been conducted to extract the TD signatures from different types of coupled optical chaos systems. More specifically, a mutually coupled semiconductor laser chaotic system, an intensity-coupled electro-optic chaotic system, and a phase-coupled electro-optic chaotic system are studied in detail. These systems are proposed to resist the attack strategies against the TD signature. They are proved to be effective under statistical analyzes, such as the self- correlation fimction （SF） and mutual information （MI）. However, only a single output has been considered for the attack process in the existing research. We demonstrated that the TD signature can still be extracted by analyzing the mutual statistical relationship between the different output signals which are generated simultaneously by the coupled system. Furthermore, we find that the extraction strategy is effective for a wide parameter range in these schemes.

关键词： optical chaotic system chaos electro-opticnonlinear system time delay (TD) concealment