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Big Data Application Simulation Platform Design for Onboard Distributed Processing of LEO Mega-Constellation Networks

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China Communications 2024年第7期21卷 334-345页

作者： zhang Zhikai Gu Shushi zhang qinyu Xue Jiayin School of Electronics and Information Engineering Harbin Institute of Technology(Shenzhen)Shenzhen 518055China Guangdong Provincial Key Laboratory of Aerospace Communication and Networking Technology Shenzhen 518055China Broadband Communications Research Department Peng Cheng LaboratoryShenzhen 518000China

Due to the restricted satellite payloads in LEO mega-constellation networks(LMCNs),remote sensing image analysis,online learning and other big data services desirably need onboard distributed processing(OBDP).In existing technologies,the efficiency of big data applications(BDAs)in distributed systems hinges on the stable-state and low-latency links between worker ***,LMCNs with high-dynamic nodes and long-distance links can not provide the above conditions,which makes the performance of OBDP hard to be intuitively *** bridge this gap,a multidimensional simulation platform is indispensable that can simulate the network environment of LMCNs and put BDAs in it for performance *** STK's APIs and parallel computing framework,we achieve real-time simulation for thousands of satellite nodes,which are mapped as application nodes through software defined network(SDN)and container *** elaborate the architecture and mechanism of the simulation platform,and take the Starlink and Hadoop as realistic examples for *** results indicate that LMCNs have dynamic end-to-end latency which fluctuates periodically with the constellation *** to ground data center networks(GDCNs),LMCNs deteriorate the computing and storage job throughput,which can be alleviated by the utilization of erasure codes and data flow scheduling of worker nodes.

关键词： big data application Hadoop LEO mega-constellation multidimensional simulation onboard distributed processing

Layered Coded Cache Placement and Cooperative Delivery with Sharing Links in Satellite-Terrestrial Integrated Networks

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China Communications 2024年第3期21卷 217-229页

作者： Gu Shushi Chen Zihan Wu Yaonan zhang qinyu Wang Ye School of Electronic and Information Engineering Harbin Institute of Technology(Shenzhen)Shenzhen 518055China Guangdong Provincial Key Laboratory of Aerospace Communication and Networking Technology Shenzhen 518055China Broadband Communications Research Department Pengcheng LaboratoryShenzhen 518052China

Cooperative utilization of multidimensional resources including cache, power and spectrum in satellite-terrestrial integrated networks(STINs) can provide a feasible approach for massive streaming media content delivery over the seamless global coverage area. However, the on-board supportable resources of a single satellite are extremely limited and lack of interaction with others. In this paper, we design a network model with two-layered cache deployment, i.e., satellite layer and ground base station layer, and two types of sharing links, i.e., terrestrial-satellite sharing(TSS) links and inter-satellite sharing(ISS) links, to enhance the capability of cooperative delivery over STINs. Thus, we use rateless codes for the content divided-packet transmission, and derive the total energy efficiency(EE) in the whole transmission procedure, which is defined as the ratio of traffic offloading and energy consumption. We formulate two optimization problems about maximizing EE in different sharing scenarios(only TSS and TSS-ISS),and propose two optimized algorithms to obtain the optimal content placement matrixes, *** results demonstrate that, enabling sharing links with optimized cache placement have more than 2 times improvement of EE performance than other traditional placement schemes. Particularly, TSS-ISS schemes have the higher EE performance than only TSS schemes under the conditions of enough number of satellites and smaller inter-satellite distances.

关键词： coded content placement cooperative delivery energy efficiency sharing links STINs

Abelmoschus manihot polysaccharide fortifies intestinal mucus barrier to alleviate intestinal inflammation by modulating Akkermansia muciniphila abundance

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Acta Pharmaceutica Sinica B 2024年第9期14卷 3901-3915页

作者： Yumeng Wang Chengxi Li Jianping Li Shu zhang qinyu zhang Jinao Duan Jianming Guo Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization Nanjing University of Chinese MedicineNanjing 210023China Jiangsu Key Laboratory for High Technology Research of TCM Formulae Nanjing University of Chinese MedicineNanjing 210023China

The intestinal mucus barrier is an important line of defense against gut *** to this barrier brings bacteria into close contact with the epithelium,leading to intestinal ***,its restoration is a promising strategy for alleviating intestinal *** study showed that Abelmoschus manihot polysaccharide(AMP)fortifies the intestinal mucus barrier by increasing mucus production,which plays a crucial role in the AMP-mediated amelioration of ***-10-deficient mouse models demonstrated that the effect of AMP on mucus production is dependent on ***,bacterial depletion and replenishment confirmed that the effects of AMP on IL-10 secretion and mucus production were mediated by Akkermansia *** findings suggest that plant polysaccharides fortify the intestinal mucus barrier by maintaining homeostasis in the gut *** demonstrates that targeting mucus barrier is a promising strategy for treating intestinal inflammation.

关键词： Plant polysaccharide Abelmoschus manihot Intestinal inflammation Mucus barrier Interleukin 10 Gut microbiota A.muciniphila Mucin 2

Semantic-aware coordinated transmission in cohesive clustered satellites: utility of information perspective

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Science China(Information Sciences) 2024年第9期67卷 338-339页

作者： Liang XU Jian JIAO Shiyao JIANG Ye WANG qinyu zhang Guangdong Provincial Key Laboratory of Aerospace Communication and Networking Technology Harbin Institute of Technology (Shenzhen) Pengcheng Laboratory

The cohesive clustered satellite(CCS) concept integrates diverse satellite payloads from different orbits, such as communication, remote sensing, and navigation satellites, into mobile, geometrically stable clusters for efficient collaborative networking [1]. By aggregating, reconstructing, and orchestrating heterogeneous satellite resources, such as computation, communication, and storage [2], the CCS enables resource ultra-sharing and provides information-centric and goal-oriented intelligent on-demand services [3] for a range of emerging Earth observation and deep space exploration missions [4].

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论新质生产力的法治保障

行政管理改革 2024年第6期6卷 32-41页

作者：张钦昱中国政法大学民商经济法学院

新质生产力的蓬勃发展在提升经济效益的同时,也对传统的治理机制提出了挑战。法治作为平衡创新与风险的制度天平,以特殊规则规范和引领创新事业。法治涵摄新质生产力的发展进程,能有效推动共同富裕、鼓励开拓创新、矫正不公平的竞争格... 详细信息

新质生产力的蓬勃发展在提升经济效益的同时,也对传统的治理机制提出了挑战。法治作为平衡创新与风险的制度天平,以特殊规则规范和引领创新事业。法治涵摄新质生产力的发展进程,能有效推动共同富裕、鼓励开拓创新、矫正不公平的竞争格局。法治坚守新质生产力发展权这一底层逻辑,实现对企业、研发人员和国家自主创新的正向激励。明确的规则清单、向善的价值理念和社会本位价值立场,为防范化解发展新质生产力可能引发的系统性风险提供了可行方案。

关键词：新质生产力法治保障创新

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面向月表多设施通信网络的通信塔部署方案

系统工程与电子技术 2024年第2期46卷 729-739页

作者：覃凯顾术实张智凯王玉刘倩赵晨张钦宇哈尔滨工业大学(深圳)电子与信息工程学院广东深圳518055 广东省空天通信与网络技术重点实验室广东深圳518055 上海宇航系统工程研究所上海201109

为在月球建立长期驻留的月面科研基地,实现局部网络的通信覆盖,提出了月球通信塔(lunar communication tower,LCT)的模型设计方法和多基站的部署方案。通过对月面探测任务与月表多设施通信网络的需求分析,设计了LCT的功能模块和模型结... 详细信息

为在月球建立长期驻留的月面科研基地,实现局部网络的通信覆盖,提出了月球通信塔(lunar communication tower,LCT)的模型设计方法和多基站的部署方案。通过对月面探测任务与月表多设施通信网络的需求分析,设计了LCT的功能模块和模型结构。引入基于地理信息的覆盖场强预测模型,结合月表地形对通信链路的损耗影响,评估了多基站通信塔的有效覆盖与传输速率指标。在部署方案上,首先,在月球南极光照区范围内采用遍历法得到覆盖平均场强最大的主基站部署位置;随后,采用遗传算法最大化主基站半径10 km范围内的覆盖场强,对月球表面特定区域进行搜索,获取多个副基站的最佳部署位置;最后,针对集中式和分布式通信塔主、副基站的部署方案,进行了对应于CCSDS Proximity-1协议、长期演进(long term evolution,LTE)、Wi-Fi制式下覆盖性和传输速率的仿真分析,充分验证了月表多设施通信网络建设的可行性。

关键词：月球通信塔月表地理信息 ITU-RP.526模型场强预测遗传算法

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业务驱动的空天地海一体化网络技术研究

电信科学 2024年第6期40卷 25-37页

作者：范珂欣安丽荣张钦宇哈尔滨工业大学(深圳) 广东深圳518055

面向不断涌现的新型应用和业务需求,空天地海一体化网络具有全域覆盖、高效灵活、弹性可靠等优势,为众多领域的多样化业务场景提供智能、协同、高效的泛在信息服务,是未来移动通信系统的重要组成部分。首先,分析了空天地海一体化的国内... 详细信息

面向不断涌现的新型应用和业务需求,空天地海一体化网络具有全域覆盖、高效灵活、弹性可靠等优势,为众多领域的多样化业务场景提供智能、协同、高效的泛在信息服务,是未来移动通信系统的重要组成部分。首先,分析了空天地海一体化的国内外发展现状、网络架构及其面临的需求挑战;然后,以海量差异化业务的承载需求为驱动力,研究了网络切片、移动边缘计算、通感算一体化关键网络技术;最后,从智能化、融合化、安全化角度探讨了未来空天地海一体化发展方向。

关键词：空天地海一体化 6G 网络技术人工智能

上海市某锂离子电池相关企业男性工人的肾功能现状分析

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环境与职业医学 2024年第4期41卷 390-396页

作者：张沁雨段志萍侯强张济明周志俊复旦大学公共卫生学院/教育部公共卫生安全重点实验室上海200032 上海市化工职业病防治院上海200041

[背景]在“双碳”目标的指导下,锂离子电池的需求大幅增长。然而,在锂离子电池生产、使用、维修的过程中,工人不可避免地会接触到各种职业危害因素,其中一些化学物具有肾毒性。[目的]评估上海市某锂离子电池相关企业男性工人肾功能状况... 详细信息

[背景]在“双碳”目标的指导下,锂离子电池的需求大幅增长。然而,在锂离子电池生产、使用、维修的过程中,工人不可避免地会接触到各种职业危害因素,其中一些化学物具有肾毒性。[目的]评估上海市某锂离子电池相关企业男性工人肾功能状况并探究肾功能状况的可能影响因素。[方法]收集在上海市某职业病防治机构开展的某锂离子电池相关企业工人职业健康检查资料,一批为上岗前体检,一批为在岗体检。使用血清肌酐、尿素氮、尿酸和肾脏B超结果评估工人的肾功能状况,根据《诊断学》第九版肾功能指标参考范围对肾功能状况进行分类,并以上岗前工人的肾功能状况作为对照进行分析比较。使用二元logistic回归模型和广义线性回归模型探究工人肾功能指标异常的影响因素。[结果]对照组工人共6 184人,平均年龄为(27.40±4.50)岁;在岗工人共3 526人,平均年龄为(29.40±4.99)岁,中位工龄为2.00(1.00,3.42)年。对照组工人血清肌酐偏高率、尿素氮偏高率、尿酸偏高率和肾脏B超异常率分别为0.66%、2.47%、30.32%和10.12%,在岗工人分别为0.96%、3.35%、38.25%和12.68%,在岗工人各项肾功能指标异常率均高于对照组工人(P 1~3年,OR=1.747,95%CI:1.494~2.042;> 3年,OR=1.866,95%CI:1.511~2.304)、高血压患病(OR=1.400,95%CI:1.055~1.859)和高血糖患病(OR=1.565,95%CI:1.221~2.006)的工人尿酸偏高风险更高。年龄较大(OR=1.038,95%CI:1.022~1.054)、工龄较长(> 1~3年,OR=1.518,95%CI:1.201~1.920)、偶尔吸烟(OR=1.239,95%CI:1.039~1.478)、经常饮酒(OR=1.875,95%CI:1.139~3.087)和高血压患病(OR=1.465,95%CI:1.075~1.998)的工人肾脏B超异常风险更高。广义线性回归分析显示,工龄(> 1~3年,β=1.120,95%CI:0.360~1.880;> 3年,β=1.451,95%CI:0.543~2.358)、吸烟状况(偶尔吸,β=0.818,95%CI:0.156~1.479;经常吸,β=0.841,95%CI:0.066~1.616)和高血压(β=2.742,95%CI:1.390~4.094)是工人血清肌酐浓度的影响因素。年龄(β=0.014,95%CI:0.009~0.019)和工龄(> 1~3年,β=0.079,95%CI:0.012~0.146)是尿素氮的影响因素。年龄(β=–1.759,95%CI:–2.288~–1.231)、工龄(≤1年,β=10.676,95%CI:4.035~17.316;> 1~3年,β=26.117,95%CI:19.962~32.272;> 3年,β=34.558,95%CI:26.116~43.001)、高血压(β=23.162,95%CI:11.617~34.707)和高血糖(β=15.017,95%CI:4.853~25.180)是尿酸的影响因素。[结论]锂离子电池工厂工人的肾功能异常情况受年龄、工龄、吸烟、饮酒、高血压和高血糖的影响。随着在锂电池工厂工作年限的增加,工人的肾功能状况可能会变差。这需要引起企业重视,分析其改变的原因,并采取针对性干预措施。

关键词：锂电池职业健康检查肾功能血清肌酐尿素氮尿酸

Network protocol architectures for future deep-space internetworking

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Science China(Information Sciences) 2018年第4期61卷 45-60页

作者： Kanglian ZHAO qinyu zhang School of Electronic Science and Engineering Nanjing University Harbin Institute of Technology Shenzhen Graduate School

In the next two decades, humans are going to experience a grand age of deep-space exploration,especially in Mars and Lunar spaces. These relatively frequent and long-term activities provide the opportunity, and at the same time, demands the necessity for a true interplanetary network as an essential infrastructure for future deep-space exploration. In this study, we try to provide a picture and a perspective in the current network protocol architectures for future deep-space internetworking. We first investigate the recent technical advances for deep-space internetworking and the challenges to their network protocol architecture. Detailed technical characteristics of three effective network protocol architectures are presented. A special focus is casted on delay tolerant networking(DTN), which is a dedicated network protocol architecture for deep-space internetworking. Finally, several open questions in DTN for future deep-space internetworking are proposed for further study.

关键词： network protocol architecture deep-space internetworking deep-space communications space internetworking delay-tolerant networking