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Variation Characteristics of Root Traits of Different Alfalfa Cultivars under Saline-Alkaline Stress and their Relationship with Soil Environmental Factors

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Phyton-International Journal of Experimental Botany 2024年第1期93卷 29-43页

作者： Tian-jiao Wei Guang Li Yan-Ru Cui jiao Xie Xing-Ai Gao Xing Teng Xin-Ying Zhao Fa-Chun Guan Zheng-Wei liang Northeast Agricultural Research Center of China Jilin Academy of Agricultural SciencesChangchun130033China Northeast Institute of Geography and Agroecology Chinese Academy of SciencesChangchun130102China

Soil salinization is the main factor that threatens the growth and development of plants and limits the increase of *** is of great significance to study the key soil environmental factors affecting plant root traits to reveal the adaptation strategies of plants to saline-alkaline-stressed soil *** this study,the root biomass,root morphological parameters and root mineral nutrient content of two alfalfa cultivars with different sensitivities to alkaline stress were analyzed with black soil as the control group and the mixed saline-alkaline soil with a ratio of 7:3 between black soil and saline-alkaline soil as the saline-alkaline treatment *** the same time,the correlation analysis of soil salinity indexes,soil nutrient indexes and the activities of key enzymes involved in soil carbon,nitrogen and phosphorus cycles was carried *** results showed that compared with the control group,the pH,EC,and urease(URE)of the soil surrounding the roots of two alfalfa cultivars were significantly increased,while soil total nitrogen(TN),total phosphorus(TP),organic carbon(SOC),andα-glucosidase activity(AGC)were significantly decreased under saline-alkaline *** was no significant difference in root biomass and root morphological parameters of saline-alkaline tolerant cultivar GN under saline-alkaline *** number of root tips(RT),root surface area(RS)and root volume(RV)of AG were reduced by 61.16%,44.54%,and 45.31%,respectively,compared with control *** ratios of K^(+)/Na^(+),Ca^(2+)/Na^(+)and Mg^(2+)/Na^(+)of GN were significantly higher than those of AG(p<0.05).The root fresh weight(RFW)and dry weight(RDW),root length(RL),RV and RT of alfalfa were positively regulated by soil SOC and TN,but negatively regulated by soil pH,EC,and URE(p<0.01).Root Ca^(2+)/Na+ratio was significantly positively correlated with soil TN,TP and SOC(p<0.01).The absorption of Mg and Ca ions in roots is significantly negatively regulated by soilβ-glucosidase ac

关键词： Saline-alkaline stress alfalfa root traits soil environmental factors correlation analysis

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Full T-cell activation and function in teleosts require collaboration of first and co-stimulatory signals

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Zoological Research 2024年第1期45卷 13-24页

作者： Wei liang Kang Li Haiyou Gao Kunming Li Jiansong Zhang Qian Zhang Xinying jiao Jialong Yang Xiumei Wei State Key Laboratory of Estuarine and Coastal Research School of Life SciencesEast China Normal UniversityShanghai 200241China Laboratory for Marine Biology and Biotechnology Qingdao National Laboratory for Marine Science and TechnologyQingdaoShandong 266237China

Mammalian T-cell responses require synergism between the first signal and co-stimulatory ***,whether and how dual signaling regulates the T-cell response in early vertebrates remains *** the present study,we discovered that the Nile tilapia(Oreochromis niloticus)encodes key components of the LAT signalosome,namely,LAT,ITK,GRB2,VAV1,SLP-76,GADS,and PLC-γ*** components are evolutionarily conserved,and CD3εmAb-induced T-cell activation markedly increased their ***,at least ITK,GRB2,and VAV1 were found to interact with LAT for signalosome *** of the first signal,the NF-κB,MAPK/ERK,and PI3K-AKT pathways were activated upon CD3εmAb ***,treatment of lymphocytes with CD28 mAbs triggered the AKT-mTORC1 pathway downstream of the co-stimulatory *** CD3εand CD28 mAb stimulation enhanced ERK1/2 and S6 phosphorylation and elevated NFAT1,c-Fos,IL-2,CD122,and CD44 expression,thereby signifying T-cell ***,rather than relying on the first or co-stimulatory signal alone,both signals were required for T-cell *** T-cell activation was accompanied by marked apoptosis and cytotoxic *** findings suggest that tilapia relies on dual signaling to maintain an optimal T-cell response,providing a novel perspective for understanding the evolution of the adaptive immune system.

关键词： Oreochromis niloticus CD3 CD28 T cells Adaptive immunity Evolution

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基于航天TDICCD相机像移分析的PSF估计及图像复原算法研究

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宇航学报 2010年第3期31卷 936-940页

作者：谢冰焦斌亮燕山大学信息科学与工程学院秦皇岛066004

根据时间延迟积分电荷耦合器件(TDICCD)特殊的工作原理,分析了其产生像移的原因,基于对TDIC-CD像移的分析估计出模糊图像的点扩散函数(PSF)。根据TDICCD像移产生的机理,建立了图像退化的数学模型,并在功率谱均衡复原算法的基础之上提出... 详细信息

根据时间延迟积分电荷耦合器件(TDICCD)特殊的工作原理,分析了其产生像移的原因,基于对TDIC-CD像移的分析估计出模糊图像的点扩散函数(PSF)。根据TDICCD像移产生的机理,建立了图像退化的数学模型,并在功率谱均衡复原算法的基础之上提出了像移复原滤波的数学表达式,对运动模糊图像进行了半盲恢复,通过Matlab仿真证明了图像复原算法的可行性和有效性。

关键词： TDICCD 图像复原像移点扩散函数PSF Matlab

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基于客户需求特征的我国私人银行客户服务体系研究

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上海金融 2011年第12期 109-113页

作者：焦量南京大学工程管理学院

私人银行业务在我国发展的时间不长,对我国私人银行客户的结构及需求特征的研究和分析尚处起步阶段。鉴于此,针对我国快速扩大的高资产净值人群及其日益增长的金融服务需求,应在研究私人银行客户需求的基础上,以私人银行客户服务体系建... 详细信息

私人银行业务在我国发展的时间不长,对我国私人银行客户的结构及需求特征的研究和分析尚处起步阶段。鉴于此,针对我国快速扩大的高资产净值人群及其日益增长的金融服务需求,应在研究私人银行客户需求的基础上,以私人银行客户服务体系建设为核心,推动我国私人银行业务持续、稳健发展。

关键词：客户需求特征私人银行客户服务体系

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用摩擦搅拌加工法制备的细晶铝合金

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轻合金加工技术 2015年第11期43卷 56-59页

作者：焦亮宝鸡职业技术学院陕西宝鸡721001

采用摩擦搅拌加工方法制备了细晶铝合金Al-3.5Mg-1.2Zn-1Ti,通过SEM和XRD分析以及拉伸试验和疲劳试验发现:摩擦搅拌加工制备的该合金平均晶粒尺寸为10.2μm,由α-Al基体和少量的Mg Zn2相、Al3Ti相组成,室温抗拉强度、屈服强度和断后伸... 详细信息

采用摩擦搅拌加工方法制备了细晶铝合金Al-3.5Mg-1.2Zn-1Ti,通过SEM和XRD分析以及拉伸试验和疲劳试验发现:摩擦搅拌加工制备的该合金平均晶粒尺寸为10.2μm,由α-Al基体和少量的Mg Zn2相、Al3Ti相组成,室温抗拉强度、屈服强度和断后伸长率分别为609 N/mm2、478 N/mm2、22.5%;疲劳寿命较传统铸态合金的延长256.2%。

关键词：细晶铝合金摩擦搅拌加工 Al-3.5Mg-1.2Zn-1Ti合金力学性能

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A NEW RANDOM PACKET ACCESS PROTOCOL IN WCDMA

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Journal of Electronics(China) 2002年第3期19卷 233-240页

作者： jiao Wenhua liang Qinglin(Department of Electronics, Peking University, Beijing 100871) Department of Electronics Peking University Beijing 100871

In this paper, a new Random Packet Access Protocol (RPAP) is proposed in WCDMA systems. The new proposed RPAP can efficiently prevent unnecessary interference by stopping a transmission if it is bound to be collided with others. Throughput about the new RPAP is deliberated and analyzed. Computer simulation shows that this protocol has better throughput performance compared with conventional one currently used in WCDMA.

关键词： Random Packet Access Protocol(RPAP) WCDMA Slotted ALOHA/CDMA

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Simultaneous enhancement of strength and ductility via microband formation and nanotwinning in an L1_(2)-strengthened alloy

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Fundamental Research 2024年第1期4卷 147-157页

作者： Lu Yang Dingshan liang Zhuo Cheng Ranxi Duan Chuanxin Zhong Junhua Luan Zengbao jiao Fuzeng Ren Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Department of Materials Science and Engineering City University of Hong KongHong Kong 999077China Department of Mechanical Engineering The Hong Kong Polytechnic UniversityHong Kong 999077China

Metallic alloys with high strength and large ductility are required for extreme structural ***,the achievement of ultrahigh strength often results in a substantially decreased ***,we report a strategy to achieve the strength-ductility synergy by tailoring the alloy composition to control the local stacking fault energy(SFE)of the face-centered-cubic(fcc)matrix in an L1_(2)-strengthened superlattice *** a proof of concept,based on the thermodynamic calculations,we developed a non-equiatomic CoCrNi_(2)(Al_(0.2)Nb_(0.2))alloy using phase separation to create a near-equiatomic low SFE disordered CoCrNi medium-entropy alloy matrix with in situ formed high-content coherent Ni_(3)(Al,Nb)-type ordered nanoprecipitates(∼12 nm).The alloy achieves a high tensile strength up to 1.6 GPa and a uniform ductility of 33%.The low SFE of the fcc matrix promotes the formation of nanotwins and parallel microbands during plastic deformation which could remarkably enhance the strain hardening *** work provides a strategy for developing ultrahigh-strength alloys with large uniform ductility.

关键词： L1_(2)-strengthened superlattice alloy Stacking fault energy Nanotwins Microbands Strain hardening

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Mixed‑Dimensional Assembly Strategy to Construct Reduced Graphene Oxide/Carbon Foams Heterostructures for Microwave Absorption,Anti‑Corrosion and Thermal Insulation

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Nano-Micro Letters 2024年第11期16卷 1-18页

作者： Beibei Zhan Yunpeng Qu Xiaosi Qi Junfei Ding jiao‑jing Shao Xiu Gong Jing‑liang Yang Yanli Chen Qiong Peng Wei Zhong Hualiang Lv College of Physics Guizhou Province Key Laboratory for Photoelectrics Technology and ApplicationGuizhou UniversityGuiyang City 550025People’s Republic of China College of Materials and Metallurgy Guizhou UniversityGuiyang City 550025People’s Republic of China National Laboratory of Solid State Microstructures and Jiangsu Provincial Laboratory for NanoTechnology Nanjing UniversityNanjing 210093People’s Republic of China Department of Materials Science and Laboratory of Advanced Materials Fudan UniversityShanghai 200433People’s Republic of China

Considering the serious electromagnetic wave(EMW)pollution problems and complex application condition,there is a pressing need to amalgamate multiple functionalities within a single ***,the effective integration of diverse functions into designed EMW absorption materials still faces the huge ***,reduced graphene oxide/carbon foams(RGO/CFs)with two-dimensional/three-dimensional(2D/3D)van der Waals(vdWs)heterostructures were meticulously engineered and synthesized utilizing an efficient methodology involving freeze-drying,immersing absorption,secondary freeze-drying,followed by carbonization *** to their excellent linkage effect of amplified dielectric loss and optimized impedance matching,the designed 2D/3D RGO/CFs vdWs heterostructures demonstrated commendable EMW absorption performances,achieving a broad absorption bandwidth of 6.2 GHz and a reflection loss of-50.58 dB with the low matching ***,the obtained 2D/3D RGO/CFs vdWs heterostructures also displayed the significant radar stealth properties,good corrosion resistance performances as well as outstanding thermal insulation capabilities,displaying the great potential in complex and variable ***,this work not only demonstrated a straightforward method for fabricating 2D/3D vdWs heterostructures,but also outlined a powerful mixeddimensional assembly strategy for engineering multifunctional foams for electromagnetic protection,aerospace and other complex conditions.

关键词： Multifunctionality Reduced graphene oxide/carbon foams 2D/3D van der Waals heterostructures Electromagnetic wave absorption Thermal insulation

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Mechanical characteristics and reservoir stimulation mechanisms of the Gulong shale oil reservoirs, the northern Songliao Basin

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Petroleum Science 2024年第3期21卷 2023-2036页

作者： Si-Wei Meng Jia-Ping Tao Tian-jiao Li Dong-Xu Li Su-Ling Wang Liu Yang Xin Liu Li-Hao liang He Liu PetroChina Research Institute of Petroleum Exploration Development Beijing100083China National Key Laboratory of Continental Shale Oil Daqing 163002HeilongjiangChina Dalian University of Technology Dalian116024LiaoningChina PetroChina Daqing Oilfield Co.Ltd. Daqing163002HeilongjiangChina Northeast Petroleum University Daqing163002HeilongjiangChina China University of Mining and Technology(Beijing) Beijing100083China

Shale oil of the Qingshankou Formation of the Gulong Sag,the northern Songliao Basin,represents the first attempt at large-scale development of pure-shale-type shale oil in *** integrating the multiscale refined reservoir characterization with macro-micro-scale mechanical testing,it is clarified that the Gulong shale is characterized by high clay mineral content,high rock plasticity,highly-developed bedding,and prominent mechanical anisotropy.A three-dimensional(3D)fracture propagation model of hydraulic fracturing was built for the Gulong shale,which fully captures the hydraulic fracture distribution pattern affected by the high bedding density,in-situ stress,and fracturing treatment *** research showed that due to influences of bedding,hydraulic fracturing in the Gulong shale forms a complex fracture morphology featuring the main fracture with multiple perpendicular branches that have different lengths(like the outdoor directional TV antenna);however,the vertical propagation of fractures is inhibited,and the fracture height is commonly less than 10 *** limited stimulated reservoir volume(SRV)is the main problem facing the fracturing stimulation of the Gulong shale *** density has vital effects on fracture morphology,so case-specific fracturing designs shall be developed for shale intervals with different bedding development *** reservoirs with welldeveloped bedding,it is suggested to properly increase the perforation cluster spacing and raise the volume and proportions of viscous fluids of the pad,so as to effectively promote vertical fracture propagation and improve reservoir stimulation *** study integrates multi-scale fine reservoir characterization and macro-micro-scale mechanical testing,as well as the construction and numerical simulation of hydraulic fracturing models for high-density layered shale reservoirs,providing a new approach and methodological framework for the fracturing research of high-density layer

关键词： Shale oil Hydraulic fracturing High bedding density Fracture propagation model

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The Game Method of Checkers based on Alpha-Beta Search Strategy with Iterative Deepening

The Game Method of Checkers based on Alpha-Beta Search Strat...

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第26届中国控制与决策会议

作者： ZichengZhao SongzeWu jiao liang Fuyu Lv ChanglongYu Beijing Institute of Technology Department of Computer Science

With the game of checkers board games, this paper proposes an algorithm based on the alpha-beta search and iterative deepening optimization. Through adjusting the search depth dynamically, we have solved the problems caused by changes in chess. Also, this paper designs a kind of zoning evaluation function considering pawn difference, in which the board is divided into six regions and assessed respectively. To quantify the pawn difference, experiments are conducted to get the reasonable scaling factor of the king and ordinary.

关键词： Checkers Alpha-Beta Search Iterative Deepening Regional Assessment

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