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随着深空探测活动的持续推进, 月球探测已成为开展行星际探测的重要部分. 月球原位资源利用是保障载人月球探测及月面长期驻留的关键技术途径, 中国已将月面原位水获取方法列为月球探测的关键技术之一. 月面原位水获取方法主要分为极区水冰勘探开采和月壤氢还原制水两种技术途径. 现有勘探到的水冰资源主要位于月球极区, 分布不均匀, 开采难度大. 目前研究提出了多种不同类型的极区水冰勘探开采方法, 但实际效果有待月面原位试验验证. 月壤加氢还原制水技术方法工作条件不受区域限制, 应用范围较广, 但仍存在反应条件要求高、能耗大等技术限制, 未来需在节能和有效矿物成分富集等方面有所突破.

大气重力波是临近空间中重要的动力学过程之一，并且广泛存在于全球大气层中，研究其全球分布及变化规律，对理解大气动力学具有重要意义。全球卫星导航系统（GNSS）可以通过掩星的方式来获取临近空间大气的温度信息，并且具有全球覆盖、垂直和水平分辨率较高的优点，从而被广泛应用于临近空间大气重力波研究。利用气象卫星风云3号C星（FY-3C）搭载的全球导航卫星掩星接收机（GNOS）的探测数据来反演全球重力波扰动分布，反演得到了2015－2019年这5年间的全球重力波分布，并着重分析了全球重力波的季节变化、年际变化以及长波和短波重力波的全球分布和特征。结果表明，冬夏两季的重力波扰动要强于春秋两季，并且呈现冬季半球强于夏季半球的现象; 同时还发现，重力波扰动的强度随着高度增加而逐渐增强；在20～50 km的高度范围内短波重力波强度大于长波重力波强度。

能源互联网的建设不仅需要技术手段的支撑，更需要以价值为驱动激活各方主体参与，打造互惠共赢的能源生态圈。为此，从能源、信息和制度经济学的视角出发，深入分析能源互联网的价值创造机理、业态创新范式和发展战略选择。首先，剖析了能源互联网的价值创造机理，其本质是以多能融合突破孤立系统的边界，从而显著扩大资源优化配置的空间；通过信息技术使得能源系统更加有序，进而促进能源系统的“熵减”；通过能源互联网平台释放范围经济的巨大红利。其次，设计了基于共享经济机制、降低交易成本、激励共享共赢的能源互联网价值分配机制，谋划了能源互联网支撑智慧城市发展、支撑绿电追踪、支撑能源消费节能降耗、提升工业资产利用率、助力政府治理的新业态。最后，策划了以再电气化为核心目标、基于价值公平分配的数据共享、以数字孪生为平台的人工智能、以负荷调度替代需求侧响应、基于共享经济的能源互联网市场机制的发展战略。

南非是非洲最具影响力的国家之一，也是全球主要温室气体排放国之一。随着全球气候变暖形势越发严峻以及本国优质煤炭资源日趋紧张，南非近年来开始积极推进能源低碳转型并提出2050年实现碳中和的减排目标。首先详细介绍了南非能源结构和碳排放现状，其次概述了南非碳中和目标的实现路径以及涉及电力、工业、交通运输、建筑、农林等领域的减排政策、规划和措施，并指出了所面临的主要困难和挑战。南非的相关实践对其他发展中国家具有重要的参考意义。

Copyright of Research of Soil & Water Conservation is the property of Institute of Soil & Water Conservation, Chinese Academy of Sciences & Ministry of Water Resources and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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Copyright of Chinese Journal of Tissue Engineering Research / Zhongguo Zuzhi Gongcheng Yanjiu is the property of Chinese Journal of Tissue Engineering Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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Objective To investigate the role and mechanism of lysine acetyltransferase 8 (KAT8) on the proliferation of colorectal cancer cells. Methods The expression of KAT8 in cancerous tissues and adjacent tissues of colorectal cancer patients was analyzed by RNA-seq data of TCGA database. Cell proliferation was detected by colony-forming unit assays and CCK8. The GEO database was used to analyze the differential genes of KAT8 knockdown cells and control cells and perform functional pathway enrichment analysis. In the colorectal cancer database hosted on eBioPortal, that conducted an analysis examining the correlation between KAT8 and genes in the regulation of N6-methyladenosine (m6A) modification. Western blot technique was employed to assess the protein expression levels of KAT8 and METTL3. Results Compared to human normal colorectal tissue, KAT8 was highly expressed in colorectal cancer(P<0.05). Knockdown or selective inactivation of KAT8 inhibited colorectal cancer cells proliferation (P<0.05). In colorectal cancer cell lines, knocking down KAT8 reduced m6A modification levels (P<0.05). Knocking down KAT8 inhibited METTL3 expression (P<0.05). Over-expression of METTL3 reversed cell proliferation which was inhibited by knockdown KAT8 (P<0.05). Conclusions KAT8 facilitates the proliferation of colorectal cancer cell lines through regulation of METTL3-mediated m6A modifications. [ABSTRACT FROM AUTHOR]

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In order to ensure accurate spraying of pesticides and reduce the loss of pesticides in fruit trees, a calculation model of precise pesticide spraying quantity in orchards was established. The model included the canopy parameters, interface properties of the fruit tree, and the pesticide destination in the orchard, which could be used to guide the modes of spraying for different plant protection machinery under different planting patterns in the orchard. By selecting 'Fushi' apple leaves of different phenological periods as research objects, the leaf surface free energy and canopy parameters were tested. The relationship between liquid surface tension and maximum liquid holdup was established for apple leaves. The maximum pesticide loading of the whole tree was calculated based on maximum liquid holdup and canopy parameters. The calculation model of precise pesticide spraying quantity was established, combined with the pesticide destination in the orchard. The application of two kinds of spraying machines, stretcher plunger pump sprayer in the low-density planting orchard and selfpropelled axial flow sprayer in the close planting orchard, were taken as examples, and the practicability of the model was verified. The results showed that the use of a stretcher plunger pump sprayer in the early stage in the low-density planting orchard could save 37.40% of liquid compared with the original, and 18.75% of liquid could be saved in the later stage. The use of a self-propelled axial flow sprayer in the late stage of the close planting orchard can save 28% of the liquid. There was no significant difference between the control efficacy and the dosage of conventional liquid medicine. This model combined the interface properties of apple leaves with the application equipment could not only calculate accurately the spraying amount of pesticide according to the actual situation of the orchard， but also evaluate the applicability of pesticide liquid at a certain period. The mode could adjust the parameters of the pesticide liquid and spray machine according to the actual situation, so as to achieve the purpose of precise pesticide application. [ABSTRACT FROM AUTHOR]

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Copyright of Storage & Process is the property of Tianjin Academy of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Ordnance Equipment Engineering is the property of Chongqing University of Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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In the multi-robot patrol task, it is difficult for a single robot to obtain global information due to the limitation of the communication distance. However, most existing multi-robot distributed patrol algorithms require each robot to obtain global information of its patrol area for decision-making. Therefore, this paper addressed on the communication radius constrain and the local information constrain to completes patrol tasks through the interaction between neighbor robots, and proposed two solution algorithms based on discrete-time consensus theory. Algorithm 1 used global information for decision-making. Algorithm 2 used discrete-time consensus theory to predict and make decisions based on local information. Through the simulator Stage, the proposed algorithm and the comparison algorithm were simulated and compared under different robot numbers, communication radii and map environments. The simulation verifies that the proposed fully distributed multi-robot patrol algorithm based on local information has similar characteristics and performance to the original algorithm, enabling robots to judge the global state without global information and complete patrol tasks based on the negotiation between neighbors. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Harbin Institute of Technology. Social Sciences Edition / Haerbin Gongye Daxue Xuebao. Shehui Kexue Ban is the property of Harbin Institute of Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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