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基于物联网的±800kV电网建设在线监测技术研究

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电网与清洁能源 2024年第2期40卷 127-134页

作者：雷磊王良赵颖博师一卿王焕郎姚金雄李志凡国网陕西省电力有限公司电力科学研究院陕西西安710100 国网(西安)环保技术中心有限公司陕西西安710100 国网陕西省电力有限公司陕西西安710048 西安理工大学电气工程学院陕西西安710048

针对在输变电工程环境监管的新形势下,以往的水土保持监测技术存在效率低、误差大等缺点,该文研究了一种输变电工程水土保持在线监测技术,通过数据的无线传输和软、硬件设备的协调配合,实现了土壤侵蚀模量、气象等数据的在线实时获取,... 详细信息

针对在输变电工程环境监管的新形势下,以往的水土保持监测技术存在效率低、误差大等缺点,该文研究了一种输变电工程水土保持在线监测技术,通过数据的无线传输和软、硬件设备的协调配合,实现了土壤侵蚀模量、气象等数据的在线实时获取,以及监测数据的集中分析处理,并成功应用于±800kV特高压输电工程。应用结果表明,该技术的数据采集传输迅速、监测精度高、数据处理分析功能简明实用,可以实现输变电工程环境数据实时监测管理,对输变电工程建设具有一定指导意义。

关键词：水土保持数据监测侵蚀模量

榛子捡拾收获机分选装置拓扑优化设计与模态分析

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农机化研究 2024年第5期46卷 19-25页

作者：任德志于浩林张任李佳奇赵英博刘凤波张金辉王伟沈阳农业大学工程学院沈阳110161 辽宁锦州庞河经济开发区管理委员会辽宁锦州121400 辽宁农业职业技术学院辽宁营口115009 朝阳市农机技术推广站辽宁朝阳122000

榛子收获机分选装置是榛子捡拾收获机的重要组成部分,直接决定了榛子分选效果和机体的使用寿命。为提高榛子捡拾分选结构稳定性,对装置整机结构进行拓扑优化设计及模态分析。首先,阐述了榛子收获机结构设计及工作原理,并建立榛子捡拾收... 详细信息

榛子收获机分选装置是榛子捡拾收获机的重要组成部分,直接决定了榛子分选效果和机体的使用寿命。为提高榛子捡拾分选结构稳定性,对装置整机结构进行拓扑优化设计及模态分析。首先,阐述了榛子收获机结构设计及工作原理,并建立榛子捡拾收获机的三维实体模型;然后,通过有限单元法对榛子捡拾收获机进行静力学分析,并通过变密度法对底部车架结构进行拓扑设计,建立优化后的分选装置模型,底部车架在满足使用性能的前提下质量降低了49.9%;最后,对优化后的整机模型进行了模态和谐响应分析。模态结果显示优化后前6阶固有频率分别为11.18、17.34、22.04、23.85、36.68、39.61Hz,谐响应结果显示分选装置在11.0Hz和17.5 Hz频率时易产生共振现象。其中,最大谐峰值出现在第1阶、2阶处。对成型装置进行试验,结果表明:分选装置能满足各项作业要求,且工作稳定,可为榛子捡拾收获机进一步优化设计提供理论参考。

关键词：捡拾收获机拓扑优化模态分析谐响应榛子

Melatonin improves synapse development by PI3K/Akt signaling in a mouse model of autism spectrum disorder

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Neural Regeneration Research 2024年第7期19卷 1618-1624页

作者： Luyi Wang Man Xu Yan Wang Feifei Wang Jing Deng Xiaoya Wang Yu zhao Ailing Liao Feng Yang Shali Wang yingbo Li Institute of Neuroscience Department of PhysiologySchool of Basic Medical ScienceChongqing Medical UniversityChongqingChina Department of Pediatric Chongqing University Fuling HospitalChongqingChina Department of Neurosurgery Xinqiao HospitalArmy Medical UniversityChongqingChina Department of Pathology Affiliated Hospital of North Sichuan Medical CollegeNanchongSichuan ProvinceChina NHC Key Laboratory of Birth Defects and Reproductive Health Chongqing Population and Family Planning Science and Technology Research InstituteChongqingChina China National Clinical Research Center for Neurological Diseases Beijing Tiantan HospitalCapital Medical UniversityBeijingChina Advanced Innovation Center for Human Brain Protection Capital Medical UniversityBeijingChina

Autism spectrum disorders are a group of neurodevelopmental disorders involving more than 1100 genes,including Ctnnd2 as a candidate gene.Ctnnd2knockout mice,serving as an animal model of autis m,have been demonstrated to exhibit decreased density of dendritic spines.The role of melatonin,as a neuro hormone capable of effectively alleviating social interaction deficits and regulating the development of dendritic spines,in Ctnnd2 deletion-induced nerve injury remains unclea r.In the present study,we discove red that the deletion of exon 2 of the Ctnnd2 gene was linked to social interaction deficits,spine loss,impaired inhibitory neurons,and suppressed phosphatidylinositol-3-kinase(PI3K)/protein kinase B(Akt) signal pathway in the prefrontal cortex.Our findings demonstrated that the long-term oral administration of melatonin for 28 days effectively alleviated the aforementioned abnormalities in Ctnnd2 gene-knockout mice.Furthermore,the administration of melatonin in the prefro ntal cortex was found to improve synaptic function and activate the PI3K/Akt signal pathway in this region.The pharmacological blockade of the PI3K/Akt signal pathway with a PI3K/Akt inhibitor,wo rtmannin,and melatonin receptor antagonists,luzindole and 4-phenyl-2-propionamidotetralin,prevented the melatonin-induced enhancement of GABAergic synaptic function.These findings suggest that melatonin treatment can ameliorate GABAe rgic synaptic function by activating the PI3K/Akt signal pathway,which may contribute to the improvement of dendritic spine abnormalities in autism spectrum disorders.

关键词： autism Ctnnd2 deletion GABAergic neurons melatonin PI3K/Akt signal pathway prefrontal cortex social behavior spine density synaptic-associated proteins

Cooperative effects at the interface of nanocrystalline metal-organic frameworks

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Nano Research 2016年第1期9卷 47-58页

作者： Bunyarat Rungtaweevoranit yingbo zhao Kyung Min Choi Omar M. Yaghi Department of Chemistry University of California-BerkeleyMaterials Sciences DivisionLawrence Berkeley National LaboratoryKavli Energy NanoSciences Institute at BerkeleyBerkeleyCalifornia 94720USA

Controlling the chemistry at the interface of nanocrystalline solids has been a challenge and an important goal to realize desired properties. Integrating two different types of materials has the potential to yield new functions resulting from cooperative effects between the two constituents. Metal-organic frameworks （MOFs） are unique in that they are constructed by linking inorganic units with organic linkers where the building units can be varied nearly at will. This flexibility has made MOFs ideal materials for the design of functional entities at interfaces and hence allowing control of properties. This review highlights the strategies employed to access synergistic functionality at the interface of nanocrystalline MOFs （nMOFs） and inorganic nanocrystals （NCs）.

关键词： metal--organic framework,inorganic nanocrystal,cooperative effects,interface design

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增温和施氮肥对荒漠草原植物群落的影响

草原与草业 2017年第2期29卷 17-23页

作者：韩敏张富贵红梅王忠武屈志强胡林曦 zhao yingbo 内蒙古农业大学草原与资源环境学院内蒙古呼和浩特010019

本研究以内蒙古短花针茅(Stipa breviflora)荒漠草原为研究对象,于2015年8月,对设置在自然条件下进行增温和氮素添加交互控制模拟试验,研究了增温与氮素添加对荒漠草原植物群落结构,包括植物群落和物种盖度、高度、密度、频度和多样性... 详细信息

本研究以内蒙古短花针茅(Stipa breviflora)荒漠草原为研究对象,于2015年8月,对设置在自然条件下进行增温和氮素添加交互控制模拟试验,研究了增温与氮素添加对荒漠草原植物群落结构,包括植物群落和物种盖度、高度、密度、频度和多样性。旨在为内蒙古荒漠草原植被对气候变化提供基础数据支持。主要研究结果表明:不同物种间的盖度,仅冷蒿物种的盖度在施氮肥和增温间有显著性差异;增温施氮肥交互作用显著降低短花针茅的盖度。施氮肥显著降低无芒隐子草物种平均高度,而增温和增温施氮肥交互作用对蒙古葱物种的平均高度有显著性差异。增温和施氮肥的交互作用显著降低短花针茅物种的密度。施氮肥显著降低冷蒿频度(P<0.05);增温和施氮肥的交互作用显著降低短花针茅频度(P<0.05)。

关键词：荒漠草原增温施氮肥植物群落

Advance in yellowing mechanism and the regulation technology of post-harvested broccoli

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Food Quality and Safety 2020年第3期4卷 107-113页

作者： Feng Luo Huixin Fang Baodong Wei Shunchang Cheng Qian Zhou Xin Zhou Xuan Zhang yingbo zhao Shujuan Ji Department of Food Science Shenyang Agricultural UniversityShenyangChina Department of Food Science and Engineering Jinzhou Medical UniversityJinzhouChina

Yellowing is one of the main problems of quality deterioration in the storage,transportation,and sales of post-harvested broccoli,which seriously affects the commodity value of broccoli.Therefore,it is of significance to understand the mechanism of the process and develop effective regulation technology.In this review,we expounded the changes in the appearance of the flower ball,bud morphology,and calyx cell structure,as well as endogenous pigment metabolism,accompanying the yellowing process of broccoli.In addition,recent research on the molecular mechanism of yellowing was summarized from the aspects of transcriptome analysis and transcription regulation.Finally,the progress on the control technology of broccoli yellowing was reviewed.

关键词： broccoli yellowing pigment metabolism transcriptome transcription factor

Meeting the challenges of invasive alien species

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National Science Review 2024年第3期11卷 296-298页

作者： Weijie zhao NSR news

The Xinjiang Uygur Autonomous Region of China is famous for its tomato production. Abundant sunshine, large day–night temperature difference and the abundant irrigation by snowmelt from the Tianshan Mountains produce...

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Ling-Ling Chen: RNA has its own features;don't study it as a protein

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National Science Review 2024年第2期11卷 301-305页

作者： Weijie zhao NSR

Non-coding RNA(ncRNA) has been a very active research area over the past 30 years. From small nc RNA – the discovery of RNA interference won the lead researchers the Nobel Prize, to long ncRNA(lncRNA), which has attracted much attention in recent years, various nc RNAs participate in all kinds of biological processes and show a variety of biomedical application prospects.

关键词： RNA

Formation mechanism and geochemical characteristics of shallow natural gas in heavy oil province,China

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Science China Earth Sciences 2008年第S1期51卷 96-106页

作者： ZHU GuangYou,ZHANG ShuiChang,zhao WenZhi,WANG ZhengJun,LIANG yingbo, zhao XueFeng&ZHANG JingYan PetroChina Oil Geologic Lab Center,Research Institutes of PetroChina Exploration and Development,Beijing 100083,China Research Institutes of PetroChina Exploration and Development PetroChina Oil Geologic Lab Center Beijing China

Shallow gas reservoirs are distributed widely in Chinese heavy oil-bearing basins.At present,shallow gas resources have opened up giant potentials.The previous researches indicate the intimate genetic relationship between shallow gas and heavy oil.Shallow gas resources are generated from crude oil degraded by anaerobic microscopic organism,it belongs to biogenic gas family of secondary genesis, namely heavy oil degraded gas.Shallow gas resources are usually distributed in the upward position or the vicinity of heavy oil reservoirs.They are mainly of dry gas,which are composed of methane and only tiny C2 + heavy hydrocarbon and relatively higher contents of nitrogen gas.Generally,methane isotopes are light,whose values are between biogenic gas and thermal cracking gas.Ethane isotopes are heavy,which mixed possibly with thermogenic gas.Carbon dioxide bear the characteristics of very heavy carbon isotope,so carbon isotopic fractionation effects are very obvious on the process of microscopic organism degradation crude oil.The heavy oil degraded gas formation,a very complex geological,geochemical and microbiological geochemical process,is the result of a series of reactions of organic matter-microbes and water-hydrocarbon,which is controlled by many factors.

关键词： heavy oil degraded gas shallow gas heavy oil biogenic gas anaerobic degradation