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Biomechanical properties of ready-to-harvest rapeseed plants:Measurement and analysis

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Information Processing in Agriculture 2023年第3期10卷 391-399页

作者： Guangchao Zhan Wangyuan Zong Lina ma Junyi wei wei Liu College of Engineering Huazhong Agricultural UniversityWuhan 430070PR China Key Laboratory of Agricultural Equipment in Middle-lower Reaches of the Yangtze River Ministry of Agriculture and Rural AffairsWuhan 430070PR China

A large loss occurs in the combine harvesting of rapeseeds due to the fragility of rapeseed pods,and all the more so with the vibration of the combine header and the collision between the header and *** loss is greatly affected by the biomechanical properties of ready-to-harvest rapeseed *** understand the mechanism of pod cracking and seed loss and to propose measures for alleviating them,it is needed to study the biomechanical properties of ready-to-harvest rapeseed *** this end,“Huayouza 62”,a widely planted rapeseed variety in central China,was selected to study the biomechanical properties,including pod-cracking resistance,main stem-shearing resistance and resonant frequencies,of whole *** results showed that the distribution of pod-cracking resistance forces was 1.333–6.100 N in the mature stage,and the pod width and thickness had a significant influence on the cracking *** main influencing factor of the main stem-shearing resistance was the stem diameter.A thicker main stem resulted in a larger shearing resistance force but a smaller shear *** moisture contents of the main stems varied from 47.71%to 76.13%.However,the varying moisture contents did not show a significant impact on the shearing *** resonant frequencies of whole rapeseed plants ready for harvest ranged from 6.5 Hz to 7.5 Hz,which was close to the excitation frequency of the cutter bar on the 4LL-1.5Y *** study lays a foundation for improving the design and construction of harvesting devices for rapeseed plants to reduce seed loss.

关键词： Rapeseed pod Cracking resistance Shearing resistance Resonant frequency Rapeseed harvesting

Leachability and fractionation of heavy metals in stainless steelmaking plant dusts

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Acta Metallurgica Sinica(English Letters) 2010年第4期23卷 267-276页

作者： Guojun ma wei FAN Zhengliang XUE wei WANG Hui TANG Key Laboratory for Ferrous Metallurgy-and Resources Utilization of Ministry of Education Wuhan University of Science and Technology Wuhan 430081 China

The leachability and fractionation of the selected heavy metals （Cr, Cd, Pb and Zn） in the stainless steelmaking plant dusts were studied by the modified HJ/T299-2007 method, the modified TCLP test and a seven-step sequential extraction procedure. The results show that the stainless steelmaking plant dusts are considered as hazardous materials since at least one of the leachable heavy metals exceeds the corresponding limit levels of State Environmental Protection Administration of China. Pb is the most extractable heavy metals by the sequential extraction procedure, while Cr, Cd and Zn mainly presents in the residual fraction bound to spinel phase and silicates. The mobile heavy metals in the dusts, which present as the species of water soluble, exchangeable species and the species bounded to carbonates and hydroxides, can be estimated as 0.08 1.2% of Cr, 7.6% 31.8% of Cd, 34.1% of Pb, 0.052-0.4% of Zn, respectively.

关键词： Dust Heavy metals Chemical speciation Stainless steel Leachability

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反弹胶囊的实验研究和理论分析

新疆师范大学学报（自然科学版） 2025年第2期44卷 36-44页

作者：韩己宁魏蔚马晓栋新疆师范大学物理与电子工程学院新疆发光矿物与光功能材料研究重点实验室新疆乌鲁木齐830054

反弹胶囊(Rebounding Capsule)这一题目源于第34届国际青年物理学家锦标赛(International Young Physicists'Tournament,IYPT),也是2021年中国大学生物理学术竞赛(China Undergraduate Physics Tournament,CUPT)的题目之一。根据能量守恒定律,受到空气阻力的影响,球状物体做自由落体运动时,反弹高度永远无法超过初始高度。而胶囊状物体由于具有旋转初速度,反弹之后有可能超过初始高度。文章针对这一现象展开分析:第一,文章对“反弹胶囊”这一生活问题进行了数学简化和物理建模。第二,根据物理模型进行了多次重复实验并对实验现象进行分析后得出,反弹胶囊反弹之后的最大高度之所以超过初始高度是由于转动能和平动能之间的相互转化。第三,对上述实验现象展开理论分析,对反弹胶囊反弹之后上升的最大高度进行了定量计算。第四,利用计算机编程模拟验证了计算结果。最后对误差进行分析,对本研究进行了总结。

关键词：能量守恒转动动能反弹高度角动量定理

Fabrication and properties of ZAO powder,sputtering target materials and the related films

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Journal of University of Science and Technology Beijing 2006年第4期13卷 346-349页

作者： wei Shao Ruixin ma Bin Liu Metallurgical and Ecological Engineering School University of Science and Technology Beijing Beijing 100083 China

Aluminum-doped zinc oxide （ZnO：Al）, abbreviated as ZAO, is a novel and widely used transparent conductive material. The ZAO powder was synthesized by chemical coprecipitation. The ZAO ceramic sputtering target materials were fabricated by sintering in air, and ZAO transparent conductive films were prepared by RF magnetron sputtering on glass substrates. XRD proved that such films had an orientation of （002） crystal panel paralleled to the surface of the glass substrate. The average transmittance of the films in the visible region exceeded 80%.

关键词： transparent conductive film Al-doped zinc oxide chemical coprecipitation sputtering target materials

Immune checkpoint inhibition mediated with liposomal nanomedicine for cancer therapy

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Military Medical Research 2024年第1期11卷 98-114页

作者： Guang-Long ma wei-Feng Lin Faculty of Medicine Centre for Cancer ImmunologyUniversity of SouthamptonSouthampton SO166YDUK Department of Molecular Chemistry and materials Science Weizmann Institute of Science76100 RehovotIsrael Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education School of ChemistryBeihang UniversityBeijing 100191China

Immune checkpoint blockade(ICB)therapy for cancer has achieved great success both in clinical results and on the *** the same time,success drives more attention from scientists to improve ***,only a small portion of patients are responsive to this therapy,and it comes with a unique spectrum of side effects termed immunerelated adverse events(irAEs).The use of nanotechnology could improve ICBs’delivery to the tumor,assist them in penetrating deeper into tumor tissues and alleviate their *** nanomedicine has been investigated and used for decades,and is well-recognized as the most successful nano-drug delivery *** successful combination of ICB with liposomal nanomedicine could help improve the efficacy of ICB *** this review,we highlighted recent studies using liposomal nanomedicine(including new emerging exosomes and their inspired nanovesicles)in associating ICB therapy.

关键词： Liposome Exosome Immune checkpoint blockade(ICB)

Symmetry and monotonicity of positive solutions to Schr?dinger systems with fractional p-Laplacians

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Applied mathematics(A Journal of Chinese Universities) 2022年第1期37卷 52-72页

作者： ma Ling-wei ZHANG Zhen-qiu School of mathematical Sciences Tianjin Normal UniversityTianjin 300387China School of mathematical Sciences and LPMC Nankai UniversityTianjin 300071China

In this paper,we first establish narrow region principle and decay at infinity theorems to extend the direct method of moving planes for general fractional p-Laplacian *** virtue of this method,we investigate the qualitative properties of positive solutions for the following Schrodinger system with fractional p-Laplacian{(-△)^(s)_(p)u+au^(p-1)=f(u,v),(-△)^(t)_(p)v+bv(p-1)=g(u,v),where 0main and the nonexistence on the half space for positive solutions to the above system under some suitable conditions on f and g,respectively.

关键词： fractional p-Laplacian Schr?dinger systems direct method of moving planes radial symmetry monotonicity nonexistence

Composite filtering with feedback information

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Journal of Systems Engineering and Electronics 2007年第1期18卷 54-56页

作者： He You Xiong wei ma Qiang Dept. of Electronic Engineering Naval Aeronautical Engineering Inst. Yantai 264001 P. R. China

The optimal fusion solution with feedback information for a hybrid multisensor data fusion system is presented. In this system, a part of sensors process their data locally to produce local tracks, and another part of sensors only provide detection reports These tracks and detection reports are communicated to a central site where track fusion and composite filtering are performed. The comparative results on the simulations suggest the feedback information from the center can greatly improve the tracking performance of the local node.

关键词： Data fusion Hybrid system Multisensor tracking Filtering

Responses of Mean and Extreme Precipitation to Different Climate Forcing Under Radiative-Convective Equilibrium

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Advances in Atmospheric Sciences 2020年第4期37卷 377-386,I0007-I0010页

作者： Chenyu ma wei YUAN Ji NIE Department of Atmospheric and Oceanic Sciences School of PhysicsPeking UniversityBeijing 100871China Aviation Meteorological Center Civil Aviation Administration of ChinaBeijing 100122China

Understanding the responses of mean and extreme precipitation to climate change is of great *** studies have mainly focused on the responses to prescribed sea surface warming or warming due to increases of *** study uses a cloud-resolving model under the idealization of radiative-convective equilibrium to examine the responses of mean and extreme precipitation to a variety of climate forcings,including changes in prescribed sea surface temperature,CO2,solar insolation,surface albedo,stratospheric volcanic aerosols,and several tropospheric *** different responses of mean precipitation are understood by examining the changes in the surface energy *** is found that the cancellation between shortwave scattering and longwave radiation leads to a small dependence of the mean precipitation response on *** responses of extreme precipitation are decomposed into three components(thermodynamic,dynamic,and precipitation efficiency).The thermodynamic components for all climate forcings are *** dynamic components and the precipitation-efficiency components,which have large spreads among the cases,are negatively correlated,leading to a small dependence of the extreme precipitation response on the forcings.

关键词： climate forcing mean precipitation extreme precipitation

One-pot Hydrothermal Synthesis of rGO-Fe3O4 Hybrid Nanocomposite for Removal of Pb（II） via magnetic Separation

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Chemical Research in Chinese Universities 2015年第4期31卷 508-513页

作者： CAO wei ma Yiran ZHOU wei GUO Lin School of Chemistry and Environment Beihang University Beijing 100191 P. R. China

The reduced graphene oxide-Fe3O4（rGO-Fe3O4） hybrid nanocomposite was prepared via a one-pot facile hydrothermal method for adsorption of heavy metal ions. The results of compositional and morphological characteri- zations show that the Fe3O4 NPs with an average diameter of 20 nm have been uniformly dispersed in rGO sheets. Due to the higher specific surface area of rGO and the magnetic properties of Fe3O4 nanoparticles, the prepared rGO-Fe3O4 hybrid nanosheets showed good adsorption capacity for the removal of Pb（II） from wastewater by simple magnetic separation. The result of control tests show that the adsorption capacity of rGO-Fe3O4 can be influenced by the ratio of ferric chloride（FeC13） to graphene oxide（GO） during the process of sample preparation and the initial concentration of Pb（II）. A better adsorption capacity was 30.68 mg/g at n（FeCl3）/m（GO） ratio of 1：5（mmol：mg） at pH=7.0 with the initial concentration of Pb（II） ions of 80 mg/L, and the experimental data were well fitted with the Langmuir adsorption model. The composite with absorbed Pb（II） can be easily collected by magnetic separation from wastewater because of the excellent magnetism of Fe3O4 NPs. The rGO-Fe3O4 hybrid nanocomposite provides an ef- fective and environment-friendly absorbent with great application potential in water purification.

关键词： Graphene Nanocomposite Adsorption magnetic separation