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A Primary Study on Mechanical Properties of Heat-Treated Wood via in-situ Synthesis of Calcium Carbonate

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Journal of Renewable Materials 2023年第1期11卷 435-451页

作者： Dianen Liang Zhenhao Ding Qilin Yan Redžo Hasanagić Leila Fathi Zi Yang Longhao Li jianbo wang Houhua Luo Qian wang Demiao Chu Key Lab of State Forest and Grassland Administration on“Wood Quality Improvement&High Efficient Utilization” School of Forestry&Landscape ArchitectureAnhui Agricultural UniversityHefeiChina Department of Wood Science and Technology Faculty of Technical EngineeringUniversity of BihaćBihaćBosnia and Herzegovina Department of Natural Resources and Earth Science Shahrekord UniversityShahrekordIran

This study aims to improve the value of fast-growing wood and extend the heat-treated wood utilization using inorganic calcium carbonate(CaCO_(3))crystals via an in-situ synthesis ***_(2)and Na 2CO_(3)solutions with a concentration ratio of 1:1 were successively introduced into the thermally modified poplar wood obtained by steam heat treatment(HT)at 200℃for 1.5 and 3 h,resulting in the in-situ synthesis of CaCO_(3)crystals inside the heat-treated *** filling effect was best at the concentration of 1.2 mol/***_(3)was uniformly distributed in the cell cavities of the heat-treated wood,and some of the crystals were embedded in the fissures of the wood cell *** morphology of CaCO_(3)crystals was mainly spherical and rhombic *** main types of CaCO_(3)crystals were calcite,vaterite,and *** HT of poplar wood at 200℃resulted in degrading the chemical components of the wood cell *** degradation led to reduced wood mechanical properties,including the surface hardness(HD),modulus of rupture(MOR),and modulus of elasticity(MOE).After CaCO_(3)was in-situ synthesized in the heat-treated wood,the HD increased by 18.36%and 16.35%,and MOR increased by 14.64%and 8.89%,*** of the CaCO_(3)synthesization,the char residue of the 200℃heat-treated wood samples increased by 9.31%and the maximum weight loss rate decreased by 19.80%,indicating that the filling with CaCO_(3)cannot only improve the mechanical properties of the heat-treated wood but also effectively enhance its thermal stability.

关键词： Heat treatment poplar wood calcium carbonate in-situ synthesis reinforcement

Atomic-scale observation of a two-stage oxidation process in Cu2O

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Nano Research 2017年第7期10卷 2344-2350页

作者： Huihui Liu He Zheng Lei Li Huaping Sheng Shuangfeng Jia Fan Cao Xi Liu Boyun Chen Ru Xing Dongshan Zhao jianbo wang School of Physics and Technology Center for Electron Microscopy and MOE Key Laboratory of Artificial Micro- and Nano-structures and Institute for Advanced Studies Wuhan University Wuhan 430072 China Middle School Attached to Huazhong University of Science and Technology Wuhan 430074 China Shuiguohu Senior Middle School Wuhan 430071 China The Department of Physics Science and Technology Baotou Normal College Baotou 014030 China Science and Technology on High Strength Structural Materials Laboratory Central South University Changsha 410083 China

Atomic-scale oxidation dynamics of Cu2O nanocrystallines （NCs） are directly observed by in situ high-resolution transmission electron microscopy. A two-stage oxidation process is observed：（1）The initial oxidation stage is dominated by the dislocation-mediated oxidation behavior of Cu2O NCs via solid-solid transformations, leading to the formation of a new intermediate CuOx phase. The possible crystal structure of the CuOx phase is discussed. （2） Subsequently, CuOx is transformed into CuO by layer-by-layer oxidation. These results will help in understanding the oxidation mechanisms of copper oxides and pave the way for improving their structural diversity and exploiting their potential industrial applications.

关键词： oxidation in situ electron microscopy Cu2O intermediated phases

中药提取物对海兰褐蛋鸡生产性能、免疫功能和抗氧化性能的影响

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中国农学通报 2024年第14期40卷 127-133页

作者：张红艳张强韩姗姗殷红王建波秦涛陕西省秦岭生态安全重点实验室/陕西省生物农业研究所西安710043 武功县华圣禽业有限公司陕西武功712200

旨在研究中药提取物对海兰褐蛋鸡的生产性能、血液免疫功能以及抗氧化性能的影响。选择健康42周龄的海兰褐壳蛋鸡360羽,随机分为4组,每组3个重复,每个重复30羽蛋鸡。样品A、B、C组在市售普通全价饲料的基础上分别添加0.4%中药提取物复... 详细信息

旨在研究中药提取物对海兰褐蛋鸡的生产性能、血液免疫功能以及抗氧化性能的影响。选择健康42周龄的海兰褐壳蛋鸡360羽,随机分为4组,每组3个重复,每个重复30羽蛋鸡。样品A、B、C组在市售普通全价饲料的基础上分别添加0.4%中药提取物复方黄连解毒散HLJDS、白头翁散BTWS、清瘟汤QWT饲喂,对照D组饲喂市售普通全价饲料。预试期7 d,试验期28 d。结果显示:生产性能上,C组蛋鸡的产蛋率极显著高于对照D组(P0.05);A组、C组蛋鸡的次蛋率极显著低于对照D组(P0.05),但对照D组出现粪蛋、血斑蛋、畸形蛋、软皮蛋的次品蛋数量要明显高于其他3组,且存在蛋品颜色不均匀的现象。免疫功能上,A组、C组蛋鸡血液中溶菌酶活性极显著高于对照D组(P<0.01);C组蛋鸡血清的球蛋白极显著高于对照D组(P<0.01),A组蛋鸡血清的球蛋白显著高于对照D组(P<0.05)。抗氧化性能上,A组、C组蛋鸡血液中T-SOD活性极显著高于对照D组(P<0.01);A组、C组蛋鸡血液中MDA含量极显著低于对照D组(P<0.01)。故在日粮中添加一定比例的HLJDS和QWT,能在一定程度上提高蛋鸡生产性能、减少次蛋率和死淘鸡只,并能提升蛋鸡免疫功能和抗氧化性能,有利于提升蛋鸡养殖经济效益。

关键词：中药提取物海兰褐蛋鸡生产性能免疫功能抗氧化性能

Life History Traits and Mechanisms of Endangerment in Ranalisma rostratum

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Wuhan University Journal of Natural Sciences 1998年第2期3卷 231-234页

作者： wang jianbo,Chen Jiakuan, Li Rongqian(College of Life Sciences,Wuhan University,Wuhan 430072, China)

Ranalisma rostratum (Alismataceae) is an endangered aquatic plant, and now there is only one population existing in China. In its natural habitat, Huli marsh in Chaling, Hunan province, the best growing plants have been observed at microsites where the water depth is 5～10cm, and the plants grow in emergent form.R. rostratum reproduces asexually or sexually. The recruitment of asexual propagules into population is a very important way to maintain the natural population size. Although seed production does not appear to limitR. rostratum, restricted dispersal of propagules and seeds, low seed viability, low germinability, slow growth of seedlings under all conditions, and habitat loss due to agriculture appear to be more important reasons for the endangerment of this plant.

关键词： Key words Ranalism rostratum life history mechanism of endangerment

某海上平台新增低压开关柜安装与调试技术分析

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设备监理 2024年第4期 61-64页

作者：梁源中全庆科黄永溪汪建波黄强云中海石油(中国)有限公司湛江分公司湛江524057

随着海洋石油平台的高速发展,电潜泵被广泛应用到采油平台上,其中电气设备安装与调试直接影响设备的工作性能,因此,电气设备安装人员需要明确影响电气设备安装与调试的内外因素。本文从新增配电柜现场施工技术要点把控、质量控制措施、... 详细信息

随着海洋石油平台的高速发展,电潜泵被广泛应用到采油平台上,其中电气设备安装与调试直接影响设备的工作性能,因此,电气设备安装人员需要明确影响电气设备安装与调试的内外因素。本文从新增配电柜现场施工技术要点把控、质量控制措施、施工安全、设备安装调试等方面进行分析,结合现场低压开关柜安装与调试出现的问题提出相应的对策,为保证电力系统正常运行提供可借鉴的经验。

关键词：海上平台开关柜安装调试

Angle-dependent spin wave spectra of permalloy ring arrays

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Chinese Physics B 2022年第11期31卷 149-154页

作者： Shuxuan Wu Zengtai Zhu Yunxu Ma Jinwu Wei Senfu Zhang jianbo wang Qingfang Liu Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education Lanzhou UniversityLanzhou 730000China Songshan Lake Materials Laboratory Dongguan 523808China Key Laboratory for Special Function Materials and Structural Design of the Ministry of the Education Lanzhou UniversityLanzhou 730000China

We investigated the angle-dependent spin wave spectra of permalloy ring arrays with the fixed outer diameter and various inner diameters by ferromagnetic resonance spectroscopy and micromagnetic *** the field is obliquely applied to the ring,local resonance mode can be observed in different parts of the *** the resonance mode will change to perpendicular spin standing waves if the magnetic field is applied along the perpendicular *** simulation results demonstrated this evolution and implied more resonance modes that maybe *** the mathematical fitting results based on the Kittel equation further proved the existence of local resonance mode.

关键词： spin waves magnetic resonance spectra spintronic devices

Coherence phase spectrum analyzer for a randomly fluctuated fractional vortex beam

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Photonics Research 2024年第1期12卷 33-39页

作者： ZHUOYI wang XINGYUAN LU jianbo GAO XUECHUN ZHAO QIWEN ZHAN YANGJIAN CAI CHENGLIANG ZHAO School of Physical Science and Technology Soochow UniversitySuzhou 215006China School of Optical-Electrical and Computer Engineering University of Shanghai for Science and TechnologyShanghai 200093China Shandong Provincial Engineering and Technical Center of Light Manipulations&Shandong Provincial Key Laboratory of Optics and Photonic Device School of Physics and ElectronicsShandong Normal UniversityJinan 250358China Shandong Joint Research Center of Light Manipulation Science and Photonics Integrated Chip of East China Normal University and Shandong Normal University East China Normal UniversityShanghai 200241China

Fractional vortex beams exhibit a higher degree of modulation dimensions than conventional vortices,thus inheriting superior anti-turbulent transmission properties through the incorporation of additional coherence ***,aliasing the mixed modes induced by coherence degradation makes the quantitative measurement of the topological charge in fractional vortex beams *** this study,a coherence phase spectrum was introduced,and experimental demonstrations to quantitatively determine the fractional topological charge of partially coherent fractional vortex beams were *** leveraging the four-dimensional measurement of a partially coherent light field,the source coherence function was inversely reconstructed,and fractional topological charges were determined with high precision by extracting the phase spectrum of the coherence ***–Gaussian,elliptical Gaussian,and plane-wave-fraction vortex beams with various degrees of coherence were used to demonstrate measurement *** proposed method is applicable to X-rays and electron *** has potential applications in optical encryption,high-capacity optical communication,and quantum entanglement.

关键词： function fractional vortex

Experimental Study of the Main Influencing Factors in Mechanical Properties of Conglomerate

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Earthquake Research in China 2020年第3期34卷 430-451页

作者： ZHOU Bo GE Hongkui ZHOU Wei wang jianbo HAO Hongyong wang Xiaoqiong LIU Pengyu Research Institute of Experiment and Detection of Xinjiang Oilfield Company Karamay 834000China Xinjiang Laboratory of Petroleum Reserve in Conglomerate Karamay 834000China Unconventional Oil and Gas Technology Research Institute China University of PetroleumBeijing 102249China China University of Petroleum-Beijing At Karamay Karamay 834000China

In recent years,with the success of exploration and development of conglomerate reservoirs in Mahu Depression,Junggar Basin,China,it is urgent to study the mechanical properties and its influencing factors of conglomerate which is considered as a new oil and gas *** on the investigations of petrologic characteristics,heterogeneity and mechanical properties of conglomerate in Baikouquan formation,the content and geometric characteristics of gravel in conglomerate,the main factors in heterogeneity and the mechanical behavior in the triaxial compression experiment of conglomerate are analyzed in this *** results show that the size and content of gravel in conglomerate varies greatly,and conglomerate has strong heterogeneity under the influence of gravel content and *** analysis of mechanical properties of conglomerate shows that conglomerate is characterized by ***,the sphericity is negatively correlated to the gravel content,while the heterogeneity increases with the increase of conglomerate *** to the existence of heterogeneous gravel,local stress may concentrate in conglomerate when the stress is ***,a large number of micro-cracks appear at the edge of gravel,demonstrating the strong plasticity of *** paper is of referential significance to the study of rock mechanical properties and the evaluation of engineering properties in conglomerate development.

关键词： Conglomerate Petrological characteristics Heterogeneity Mechanical properties Plasticity

Strong size effect on deformation twin-me diate d plasticity in body-centered-cubic iron

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Journal of Materials Science & Technology 2023年第13期144卷 235-242页

作者： Ligong Zhao Guoxujia Chen He Zheng Shuangfeng Jia Kaixuan Li Renhui Jiang Lei Li Ying Zhang Huayu Peng Peili Zhao Ziyang Huang jianbo wang School of Physics and Technology Center for Electron MicroscopyMOE Key Laboratory of Artificial Micro-and Nano-structuresand Institute for Advanced StudiesWuhan UniversityWuhan 430072China Suzhou Institute of Wuhan University SuzhouJiangsu 215123China Wuhan University Shenzhen Research Institute ShenzhenGuangdong 518057China

Deformation twinning serves as an important mode of plastic dissipation processes in nanoscale body-centered cubic(BCC)metals,but its origin and spatio-temporal features are ***,applying in situ tensile experiments,we report a strong size effect on mediating the twinning behaviors and twin boundary(TB)-dislocation interaction mechanisms in BCC iron(Fe)nanowires(NWs).There exists a critical diameter(d)of∼2.5 nm,above which the deformation twinning rather than dislocation slip dominates the *** the traditional reflection TBs,the intermediate isosceles TBs are consis-tently observed as mediated by the 1/12partial ***,we uncover two distinct TB-related deformation mechanisms,including twin variant re-orientation and TB cracking for NWs with d17 nm,*** molecular dynamics and statics simulations provide the basic underlying mechanisms for size-dependent plasticity,which have been largely overlooked in previous experimental *** findings highlight the importance of grain size in mediating the deformation behaviors in Fe,serving as possible guidance for exploring single-crystalline and poly-crystalline Fe-based materials(***)with optimized mechanical performance.

关键词： Size effect Full dislocation,Isosceles twin boundary Twin variant rotation TB cracking