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施肥对我国农田土壤磷素形态影响的Meta分析

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中国土壤与肥料 2024年第8期 43-51页

作者：刘双凤杨德志王凤徐晋玲山东师范大学地理与环境学院山东济南250358

磷素形态影响土壤生产力,施肥可改变磷素形态。基于我国农田施肥对磷素影响的30篇文献808组数据,利用Meta分析方法,探究施肥对我国农田土壤磷素形态及有效性的效应及影响因素,选择合理的施肥方式以提高磷素利用率。结果表明:总体上施肥... 详细信息

磷素形态影响土壤生产力,施肥可改变磷素形态。基于我国农田施肥对磷素影响的30篇文献808组数据,利用Meta分析方法,探究施肥对我国农田土壤磷素形态及有效性的效应及影响因素,选择合理的施肥方式以提高磷素利用率。结果表明:总体上施肥增加所有形态磷素含量[效应值(E)≥0.14],显著提升有效磷含量(E=1.44,95%置信区间:1.13~1.74)。氮磷钾肥有机肥配施(E=2.27,95%置信区间:1.70~2.85)对有效磷含量的提升显著高于单施磷肥和氮磷钾肥配施等施肥方式,施磷量(≥300 kg/hm^(2))越高、施肥年限(≥20年)越长,有效磷增加幅度越大;与数据所涉及的其他土壤类型相比,初育土(E=2.01)有效磷效应值更高,土壤pH 6~8(E=1.63)、初始有机质含量为≥30 g/kg(E=2.00),有效磷效果提升优于土壤其他条件;高温高湿(气温≥10℃,降水≥800 mm)环境更有利于提高磷素利用率。以上结果为因地制宜制定农田磷素管理方案、提高土壤磷素利用率提供科学指导。

关键词：磷素形态有效磷施肥 Meta分析

后续养护方式缓解蒸汽养护混凝土性能缺陷的试验研究

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水电能源科学 2024年第8期42卷 79-82页

作者：贾彦丽杨德志贾博文河南交通职业技术学院河南郑州450006 郑州大学土木工程学院河南郑州450001

为研究后续养护缓解蒸汽养护造成的永久损伤,以蒸汽养护混凝土为例,设计了4种后续养护方式,测试不同后续养护方法对混凝土抗压强度、吸附系数、氯离子扩散系数和透气性等性能参数的影响。结果表明,后续养护方式对混凝土试件28 d强度增... 详细信息

为研究后续养护缓解蒸汽养护造成的永久损伤,以蒸汽养护混凝土为例,设计了4种后续养护方式,测试不同后续养护方法对混凝土抗压强度、吸附系数、氯离子扩散系数和透气性等性能参数的影响。结果表明,后续养护方式对混凝土试件28 d强度增长贡献率由大到小为标准养护、饱和石灰水养护、水养护和空气养护;混凝土毛细吸附性、氯离子扩散性和透气性曲线均呈近似“L”形,即随养护时间增加而降低,且前期(龄期3 d前)下降显著,后期趋于平缓;蒸汽养护混凝土预制构件均应及时进行适当加湿养护,但不建议长时间浸泡于水环境中养护。

关键词：混凝土蒸汽养护毛细吸水率氯离子扩散抗压强度耐久性

Magneto-Conductance in Tri-(8-Hydroxyquinoline)Aluminum-Based Organic Light Emitting Diodes

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Chinese Physics Letters 2013年第8期30卷 140-143页

作者： XU Kai yang de-zhi MA Dong-Ge State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022 Graduate University of the Chinese Academy of Sciences Beijing 100049

The origin of magneto-conductance(MC)in tri-(8-hydroxyquinoline)-aluminum(Alq3)-based organic light emitting diodes is *** results clearly show that the generated MC is related to the singlet polaron pair *** studies on the MC in an electron blocking layer N,N'-bis(lnaphthyl)-N,N'-diphenyl-l,l'-biphentl-4,4'-diamine(NPB)and a hole blocking layer 2,2',2"-(1,3,5-Benzinetriyl)-tris(1-phenyl-1-H-benzimidazole(TPBi)-based devices indicate that the holes reaching the cathode from the dissociation of singlet polaron pairs on Alq3 are the main cause of the MC *** is found that the MC can be significantly reduced by doping a red fluorescence dye DCJTB as a hole trapper in Alq3.

关键词： Alq3 polaron doping

High Current Transfer Ratio Organic Optocoupler Based on Tandem Organic Light-Emitting Diode as the Input Unit

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Chinese Physics Letters 2012年第11期29卷 115-118页

作者： yang de-zhi SUN Heng-Da CHEN Jiang-Shan MA Dong-Ge State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022

An organic optocoupler(OOC)is fabricated with a tandem organic light-emitting diode(OLED)as the light source(input unit)and an organic photodiode(OPD)as the detector(output unit).It is found that using the tandem OLED as the input unit can significantly increase the current transfer ratio of the organic *** the tandem OLED operates under 8 V and the OPD operates under-4 V,the current transfer ratio of the optocoupler reaches 5.4%.Simultaneously,the I_(ON)/I_(OFF) ratio of the optocoupler reaches 10^(5),which can be attributed to the small leakage current of the OPD,and the high efficiency of the OPD and the tandem OLED.

关键词： OLED diode attributed

design and Synthesis of Hydrazine and Oxadiazole-containing derivatives of Sorafenib as Antitumor Agents

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Chemical Research in Chinese Universities 2013年第3期29卷 454-459页

作者： WANG Yuan-you LIU Jian-zhen YU Xiao-yue yang de-zhi ZHANG Lin-na ZHAO Gui-sen Key Laboratory of Chemical Biology Ministry of Education Department of Medicinal Chemistry School of Pharmaceutical Sciences Qilu Hospital Shandong University Jinan 250012 P. R. China

A series of hydrazine and oxadiazole analogs of Sorafenib was designed, synthesized and characterized by proton nuclear magnetic resonance（1H NMR） spectrometry and high resolution mass spectrometry（HRMS）. The anti-proliferative activities of these compounds against human colorectal earcinoma（HCT-116） and human breast cancer （MDA-MB-231） tumor cell lines were evaluated in vitro by MTT method[MTT=3-（4,5-dimethylthiazol-2-yl）-2,5- diphenyltetrazolium bromide]. The bioassay results suggest that most of the synthesized compounds have antitumor potential to HCT-116 cell line compared with MDA-MB-231 cell line. Compounds 8a, 8b, 8d, Be, 9f and 9j competitive with Sorafenib demonstrated antiproliferative activities on HCT-116 cell line.

关键词： Sorafenib analog Antiproliferative activity Antitumor agent

Evolutionary dynamics of tax-based strong altruistic reward andpunishment in a public goods game

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Chinese Physics B 2024年第9期33卷 247-257页

作者： zhi-Hao yang Yan-Long yang Mathematics and Statistics School Guizhou UniversityGuiyang 550025China

In public goods games, punishments and rewards have been shown to be effective mechanisms for maintaining individualcooperation. However, punishments and rewards are costly to incentivize cooperation. Therefore, the generation ofcostly penalties and rewards has been a complex problem in promoting the development of cooperation. In real society,specialized institutions exist to punish evil people or reward good people by collecting taxes. We propose a strong altruisticpunishment or reward strategy in the public goods game through this phenomenon. Through theoretical analysis and numericalcalculation, we can get that tax-based strong altruistic punishment (reward) has more evolutionary advantages thantraditional strong altruistic punishment (reward) in maintaining cooperation and tax-based strong altruistic reward leads toa higher level of cooperation than tax-based strong altruistic punishment.

关键词： evolutionary game theory strong altruism punishment reward

OsPDR20 is an ABCG metal transporter regulating cadmium accumulation in rice

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Journal of Environmental Sciences 2024年第2期136卷 21-34页

作者： He Li Chao Li Di Sun zhi Min yang department of Biochemistry and Molecular Biology College of Life SciencesNanjing Agricultural UniversityNanjing 210095China

Cadmium(Cd)is a non-essential toxic heavy metal,seriously posing high environmental risks to human *** genetic resources relevant to functional genes is important for understanding the metal absorption and accumulation in crops and bioremediation of Cd-polluted *** study investigated a functionally uncharacterized ATP binding cassette transporter G family(ABCG)gene encoding a Pleiotropic Drug Resistance 20(PDR20)type metal transporter which is localized to the plasma membrane of ***20 was transcriptionally expressed in almost all tissues and organs in lifespan and was strongly induced in roots and shoots of young rice under Cd *** expression of OsPDR20 in a yeast mutant ycf1 sensitive to Cd conferred cellular tolerance with less Cd *** of OsPDR20 by RNA interference(RNAi)moderately attenuated root/shoot elongation and biomass,with reduced chlorophylls in rice grown under hydroponic medium with 2 and 10μmol/L Cd,but led to more Cd accumulation.A field trial of rice grown in a realistic Cd-contaminated soil(0.40 mg/kg)showed that RNAi plants growth and development were also compromised compared to wild-type(WT),with smaller panicles and lower spikelet fertility but little effect on yield of ***,OsPDR20 suppression resulted in unexpectedly higher levels of Cd accumulation in rice straw including lower leaves and culm and *** results suggest that OsPDR20 is actively involved in Cd accumulation and homeostasis in rice *** increased Cd accumulation in the RNAi plants has the potential application in phytoremediation of Cd-polluted wetland soils.

关键词： Rice ABCG transporter Cadmium accumulation Phytoremediation

A comprehensive review on microchannel heat sinks for electronics cooling

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International Journal of Extreme Manufacturing 2024年第2期6卷 133-162页

作者： zhi-Qiang Yu Mo-Tong Li Bing-yang Cao Key Laboratory for Thermal Science and Power Engineering of Ministry of Education Department of Engineering MechanicsTsinghua UniversityBeijing 100084People’s Republic of China

The heat generation of electronic devices is increasing dramatically,which causes a serious bottleneck in the thermal management of electronics,and overheating will result in performance deterioration and even device *** the development of micro-machining technologies,the microchannel heat sink(MCHS)has become one of the best ways to remove the considerable amount of heat generated by high-power *** has the advantages of large specific surface area,small size,coolant saving and high heat transfer *** paper comprehensively takes an overview of the research progress in MCHSs and generalizes the hotspots and bottlenecks of this *** heat transfer mechanisms and performances of different channel structures,coolants,channel materials and some other influencing factors are ***,this paper classifies the heat transfer enhancement technology and reviews the related studies on both the single-phase and phase-change flow and heat *** comprehensive review is expected to provide a theoretical reference and technical guidance for further research and application of MCHSs in the future.

关键词： microchannel heat sink thermal management of electronics microscale heat transfer heat transfer enhancement

Adaptive joint configuration optimization for collaborative inference in edge-cloud systems

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Science China(Information Sciences) 2024年第4期67卷 335-336页

作者： Zheming yang Wen JI zhi WANG Institute of Computing Technology Chinese Academy of Sciences University of Chinese Academy of Sciences Peng Cheng Laboratory Tsinghua Shenzhen International Graduate School Tsinghua University

With the rapid development of technologies such as deep learning and the Internet of Things(IoT), the deployment and application of various IoT devices are becoming increasingly widespread, resulting in the inference tasks generated increasing dramatically [1]. Many deep neural network(DNN) models are deployed on servers for performing inference tasks.

关键词： Inference engines