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International Journal of Minerals,Metallurgy and Materials 2023年第3期30卷 525-535页

作者： Yi Liu jingnan qin Linlin Lu Jie Xu Xiaolei Su Xi’an Polytechnic University Xi’an 710048China

Porous carbon(PC)is a promising electromagnetic(EM)wave absorbing material thanks to its light weight,large specific surface area as well as good dissipating *** further improve its microwave absorbing performance,silver coated porous carbon(Ag@PC)is synthesized by one-step hydro-thermal synthesis process making use of fir as a biomass *** compositions,morphological structure,and microwave absorption capability of the Ag@PC has been *** results show that the metallic Ag was successfully reduced and the particles are evenly distributed inward the pores of the carbon formwork,which accelerates graphitization process of the amorphous *** Ag@PC composite without adding polyvinyl pyrrolidone(PVP)exhibits higher dielectric constant and better EM wave dissipating *** is because the larger particles of Ag give rise to higher electric *** combing with frequency selective surface(FSS),the EM wave absorbing performance is further improved and the frequency region below-10 d B is located in8.20-11.75 GHz,and the minimal reflection loss value is-22.5 *** work indicates that incorporating metallic Ag particles and FSS provides a valid way to strengthen EM wave absorbing capacity of PC material.

关键词： biomass carbon Ag@PC composite material frequency selective surface electromagnetic wave absorbing property

The underlying mechanism of variety–water–nitrogen–stubble damage interactions on yield formation in ratoon rice with low stubble height under mechanized harvesting

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Journal of Integrative Agriculture 2024年第3期23卷 806-823页

作者： jingnan Zou Ziqin Pang Zhou Li Chunlin Guo Hongmei Lin Zheng Li Hongfei Chen Jinwen Huang Ting Chen Hailong Xu Bin qin Puleng Letuma Weiwei Lin Wenxiong Lin College of Life Sciences Fujian Agriculture and Forestry University(FAFU)/Fujian Key Laboratory for Agroecological Processes and Safety MonitoringFuzhou 350002China College of Agriculture FAFU/Fujian Key Laboratory for Crop Physiology and Molecular EcologyFuzhou 350002China Institute of Oceanography College of Geography and OceanographyMinjiang UniversityFuzhou 350108China Crop Science Department The National University of LesothoRoma 00100Lesotho The Agricultural Extension Station of Pucheng County Nanping 353400China

Agronomic measures are the key to promote the sustainable development of ratoon rice by reducing the damage from mechanical crushing to the residual stubble of the main crop, thereby mitigating the impact on axillary bud sprouting and yield formation in ratoon rice. This study used widely recommended conventional rice Jiafuzhan and hybrid rice Yongyou 2640 as the test materials to conduct a four-factor block design field experiment in a greenhouse of the experimental farm of Fujian Agricultural and Forestry University, China from 2018 to *** treatments included fertilization and no fertilization, alternate wetting and drying irrigation and continuous water flooding irrigation, and plots with and without artificial crushing damage on the rice stubble. At the same time, a 13C stable isotope in-situ detection technology was used to fertilize the pot experiment. The results showed significant interactions among varieties, water management, nitrogen application and stubble *** to the long-term water flooding treatment, the treatment with sequential application of nitrogen fertilizer coupled with moderate field drought for root-vigor and tiller promotion before and after harvesting of the main crop, significantly improved the effective tillers from low position nodes. This in turn increased the effective panicles per plant and grains per panicle by reducing the influence of artificial crushing damage on rice stubble and achieving a high yield of the regenerated rice. Furthermore, the partitioning of 13C assimilates to the residual stubble and its axillary buds were significantly improved at the mature stage of the main crop, while the translocation rate to roots and rhizosphere soil was reduced at the later growth stage of ratooning season rice. This was triggered by the metabolism of hormones and polyamines at the stem base regulated by the interaction of water and fertilizer at this time. We therefore suggest that to achieve a high yield of ratoon rice

关键词： mechanized harvesting ratoon rice rice stubble yield attributes

基于高性能黑硅MEMS热电堆的激光功率测试方法

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激光与光电子学进展 2016年第11期53卷 280-285页

作者：李竞男鲍爱达秦丽中北大学仪器与电子学院山西太原030051 中北大学电子测试技术国防科技重点实验室山西太原030051

针对传统激光功率计体积庞大、响应速度慢且检测精度难以保证的缺陷,提出了一种基于高性能黑硅MEMS热电堆的激光功率测试方法。该测试方法利用激光的热效应,以CO2激光器为被测激光光源,黑硅MEMS热电堆探测器为激光探测传感器。根据能量... 详细信息

针对传统激光功率计体积庞大、响应速度慢且检测精度难以保证的缺陷,提出了一种基于高性能黑硅MEMS热电堆的激光功率测试方法。该测试方法利用激光的热效应,以CO2激光器为被测激光光源,黑硅MEMS热电堆探测器为激光探测传感器。根据能量转换原理,热电堆吸收激光辐射的能量转换为自身热力学能,热力学能以电压的形式输入CMOS接口电路。通过TopView2000通用虚拟仪器应用软件采集和处理数据,获得激光功率相关数据。在室温条件下,对MEMS热电堆激光功率检测系统在不同占空比和不同出光时间的CO2激光照射下,进行重复实验。结果表明,在激光输出占空比为30%、总出光时间为150 ms条件下,系统热响应时间为14.92ms,计算出激光功率值为23.01 W,测量相对偏差为0.55%,满足了实际应用中对激光功率高精度、低成本、低功耗、强便携性等的需求。

关键词：光电子学光电检测激光功率测量 CMOS接口电路黑硅MEMS热电堆探测器

微型四旋翼无人机磁测系统误差的两步校准法研究

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电子器件 2017年第5期40卷 1173-1177页

作者：李竞男鲍爱达秦丽中北大学电子测试国家重点实验室仪器科学与动态测试教育部重点实验室太原030051

用于地磁测量的MEMS三轴磁阻传感器越来越普遍的应用到无人机上进行姿态测量,为提高磁测系统的测量精度需要对传感器误差进行分析和补偿。现采用了一种两步校准法,即首先利用基于最小二乘的椭球假设拟合法对三轴矢量磁传感器的零偏、灵... 详细信息

用于地磁测量的MEMS三轴磁阻传感器越来越普遍的应用到无人机上进行姿态测量,为提高磁测系统的测量精度需要对传感器误差进行分析和补偿。现采用了一种两步校准法,即首先利用基于最小二乘的椭球假设拟合法对三轴矢量磁传感器的零偏、灵敏度与不正交误差进行标定补偿,目的是得到准确正交的传感器坐标系;利用四位置法对标定后传感器坐标系与测量系统坐标系之间的安装误差进行校准,从而得到磁测系统坐标系下的准确测量数据。无磁转台实验表明:经两步法后测量的磁场模值误差均值由校准前的2 900 n T降低为900 n T,校准效果明显;测量系统单轴(Z轴)的误差均值由2 736 n T降低为49 n T,有效的验证了安装误差校准的正确性。通过实验数据比较得出此方法优于传统的摇摆法,实际操作简单,不需要高精度辅助设备,能够有效的应用于无人机姿态测量系统校准,提高姿态角解算精度。

关键词：磁传感器测试误差补偿误差解算椭球拟合四位置法

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航空制造业税收政策研究演进可视化分析

国际税收 2024年第6期 72-81页

作者：韩霞臧静楠秦征北京航空航天大学公共管理学院中国民航大学安全科学与工程学院北京市财政局

航空制造业的发展水平直接关系国民经济发展与国防安全,是一国工业发展水平与国际竞争力的重要体现。税收政策作为有效的政策工具,在支持航空制造业发展中发挥着重要作用。本文利用可视化文献计量分析法,运用Citespace软件对中国知网和W... 详细信息

航空制造业的发展水平直接关系国民经济发展与国防安全,是一国工业发展水平与国际竞争力的重要体现。税收政策作为有效的政策工具,在支持航空制造业发展中发挥着重要作用。本文利用可视化文献计量分析法,运用Citespace软件对中国知网和Webof Science数据库中收录的国内外航空制造业税收政策研究相关文献进行计量分析和综合评价,把握国内外航空制造业税收政策研究发展趋势,挖掘航空制造业领域税收政策研究热点问题。研究表明,未来针对航空制造业税收政策的研究应重点关注税收优惠政策体系构建、航空制造与绿色技术融合发展,以及税收政策研究的跨部门合作,为航空制造业高水平发展提供更有效的税收政策支持和保障。

关键词：航空制造业税收政策可视化分析

Application of a novel inhibitor of human CD59 for the enhancement of complement-dependent cytolysis on cancer cells

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Cellular & Molecular Immunology 2011年第2期8卷 157-163页

作者： Tao You Weiguo Hu Xiaowen Ge jingnan Shen Xuebin qin Department of Musculoskeletal Oncology First Affiliated HospitalSun Yat-Sen UniversityGuangzhouChina Laboratory for Translational Research Harvard Medical SchoolCambridgeMAUSA Department of Medicine Brigham and Women’s HospitalHarvard Medical SchoolBostonMAUSA

Many monoclonal antibodies(mAbs)have been extensively used in the clinic,such as rituximab to treat ***,resistance and non-responsiveness to mAb treatment have been challenging for this line of *** is one of the main mediators of antibody-based cancer therapy via the complement-dependent cytolysis(CDC)***59 plays a critical role in resistance to mAbs through the CDC *** this paper,we attempted to investigate whether the novel CD59 inhibitor,recombinant ILYd4,was effective in enhancing the rituximab-mediated CDC effect on rituximab-sensitive RL-7 lymphoma cells and rituximab-induced resistant RR51.2 ***,the CDC effects,which were mediated by rituximab and anti-CD24 mAb,on the refractory multiple myeloma(MM)cell line ARH-77 and the solid tumor osteosarcoma cell line Saos-2,were respectively *** found that rILYd4 rendered the refractory cells sensitive to the mAb-mediated CDC effect and that rILYd4 exhibited a synergistic effect with the mAb that resulted in tumor cells *** effect on tumor cell lysis was apparent on both hematological tumors and solid ***,rILYd4 may serve as an adjuvant for mAb mediated-tumor immunotherapy.

关键词： CD59 complement lymphoma multiple myeloma rituximab

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薹草属植物的生物学研究进展

中国草地学报 2024年第4期46卷 120-131页

作者：王竞红张靖楠覃崇源谭卓然罗语菲蔺吉祥王非东北林业大学园林学院黑龙江哈尔滨150040

薹草属(Carex)隶属于莎草科,是被子植物中最大的属之一。该属植物种类繁多,可见于林下、林缘、湿地、草甸等多种生境,分布较为广泛。该属内许多薹草种株型优美,抗性较强,在园林植物造景、盐碱地绿化和湿地植被修复等方面起着重要的作用... 详细信息

薹草属(Carex)隶属于莎草科,是被子植物中最大的属之一。该属植物种类繁多,可见于林下、林缘、湿地、草甸等多种生境,分布较为广泛。该属内许多薹草种株型优美,抗性较强,在园林植物造景、盐碱地绿化和湿地植被修复等方面起着重要的作用,因而近年来逐渐受到人们的关注。基于此,本文从薹草属植物的系统分类、抗逆性与栽培繁殖3个方面对其分类依据、新种发现情况、不同非生物因子的影响以及不同繁殖方式和养护特点进行了总结,并提出了研究展望。以期为薹草属植物应用于园林绿化与生态修复提供理论依据,也为薹草属植物后续在抗逆机理、种子萌发和快速繁殖等方面深入研究提供思路。

关键词：薹草属形态特征系统分类抗逆性繁殖

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不同解冻方法对3种速冻柑橘果肉品质特性的影响

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华中农业大学学报 2024年第2期43卷 154-163页

作者：王留言任婧楠秦雨晴范刚潘思轶李正伦胡兆兴何祥华中农业大学食品科学技术学院/环境食品学教育部重点实验室/果蔬加工与品质调控湖北省重点实验室武汉430070 秭归县屈姑食品有限公司秭归443600

为探究解冻方法对秭归脐橙、宜昌蜜桔、椪柑3个品种速冻柑橘果肉品质的影响,采用冰箱解冻、自然解冻、流水解冻、水浴解冻、超声波解冻和微波解冻6种方法对柑橘果肉进行处理,测定了速冻柑橘果肉的解冻时间、汁液流失率、常规品质指标、... 详细信息

为探究解冻方法对秭归脐橙、宜昌蜜桔、椪柑3个品种速冻柑橘果肉品质的影响,采用冰箱解冻、自然解冻、流水解冻、水浴解冻、超声波解冻和微波解冻6种方法对柑橘果肉进行处理,测定了速冻柑橘果肉的解冻时间、汁液流失率、常规品质指标、色泽、硬度、总酚含量、抗氧化活性的变化,并进行感官评价。结果表明,不同解冻处理对秭归脐橙、宜昌蜜桔和椪柑果肉品质的影响呈现显著差异(P<0.05)。秭归脐橙、宜昌蜜桔、椪柑3个品种微波解冻的时间最短,分别是0.82、0.89、0.81 min;汁液流失率最低,分别是0.25%、0.16%、0.15%;微波和超声波解冻的常规品质指标保存的较好;微波解冻的色泽影响最小,ΔE分别为8.48、7.52、4.71,且硬度损失率最小,分别降低了36.10%、52.03%和36.48%;总酚含量、抗氧化活性较高,感官方面与新鲜果肉样品最接近。以上结果表明,相比于其他5种解冻方式,微波解冻可以在1 min内完成果肉的解冻,有效减缓果肉颜色变化和硬度损失,较好地保留速冻柑橘果肉的食用品质和营养品质。

关键词：柑橘解冻方法速冻品质风味

Topological superconductor candidates PdBi_(2)Te_(4) and PdBi_(2)Te_(5) from a generic ab initio strategy

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npj Computational Materials 2023年第1期9卷 400-406页

作者： Aiyun Luo Ying Li Yi qin jingnan Hu Xiaoxu Wang Jinyu Zou Biao Lian Gang Xu Wuhan National High Magnetic Field Center&School of Physics Huazhong University of Science and TechnologyWuhanChina Department of Physics Princeton UniversityPrincetonNJUSA Institute for Quantum Science and Engineering Huazhong University of Science and TechnologyWuhanChina Wuhan Institute of Quantum Technology WuhanChina

Superconducting topological metals(SCTMs)have recently emerged as a promising platform of topological superconductivity(TSC)and Majorana zero modes for quantum *** their importance in both fundamental research and applications,SCTMs are very rare in ***,we propose a strategy to design SCTMs by intercalating the superconducting units into the topological insulators.A program that characterizes the superconducting BdG Chern number of 2D BdG Hamiltonian from ab initio calculations is also *** this strategy,PdBi_(2)Te_(5) and PdBi_(2)Te_(4) are found to be experimentally synthesizable and ideal *** TSC could be realized in such SCTMs by incorporating topological surface states with Zeeman effect,which can be realized by an external magnetic field or in proximity to ferromagnetic *** strategy provides a new method for identifying the SCTMs and TSC candidates,and the program makes it possible to design and modulate the TSC candidates from ab initio calculations.

关键词： topological superconductor generic

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蓝靛果活性成分及应用的研究进展

现代食品科技 2024年第7期40卷 324-333页

作者：谭卓然覃崇源张靖楠潘于乔蔺吉祥王竞红东北林业大学园林学院黑龙江哈尔滨150040

蓝靛果(Lonicera caerulea L.)是一种营养物质丰富的寒地特色小浆果,广泛应用于食品及健康医疗领域。但一直以来,人们对蓝靛果的认知还很有限,缺乏对其营养特征与应用的深入了解。基于此,该文从蓝靛果活性成分、健康与食品应用等方面对... 详细信息

蓝靛果(Lonicera caerulea L.)是一种营养物质丰富的寒地特色小浆果,广泛应用于食品及健康医疗领域。但一直以来,人们对蓝靛果的认知还很有限,缺乏对其营养特征与应用的深入了解。基于此,该文从蓝靛果活性成分、健康与食品应用等方面对国内外现有研究进行了归纳与总结。从现有研究来看,蓝靛果富含花色苷、黄酮类化合物、酚酸、有机酸、萜类化合物、氨基酸、维生素、矿质元素等活性成分,具有抗氧化、降血脂、抗菌抗炎、抗癌、防辐射、护甲状腺等健康特性,并发现矢车菊素-3-O-葡萄糖苷是其中主要的活性成分。此外,该文对蓝靛果在果汁、果酒、冻干粉、酸奶等食品领域的应用也进行了归纳与总结,最后提出了研究展望,重视市场应用的需要,在培育、种植、加工、生理研究等方面提出建议,旨在为蓝靛果功能机理研究、食品及功能性产品开发等提供一定的科学依据。

关键词：蓝靛果成分食品健康药用研究进展

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