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淮南煤与内蒙古煤配煤煤灰熔融特性及气化反应性研究

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煤炭转化 2024年第4期47卷 68-78页

作者：刘国斌张湘陆启均桂国阳黄杰李寒旭焦发存淮南矿业(集团)有限责任公司煤炭销售分公司安徽淮南232001 安徽理工大学化工与爆破学院安徽淮南232001 安徽理工大学安徽省现代煤炭加工技术研究院安徽淮南232001

淮南煤煤灰熔融温度高导致其无法直接在气流床气化炉上使用,将淮南煤ZA煤分别与低灰熔融温度内蒙古煤ZB煤和ZC煤按照1∶9,2∶8,3∶7,4∶6,5∶5,6∶4,7∶3,8∶2,9∶1的质量比进行配煤,利用智能灰熔点测定仪(封碳法)对单煤及其配煤煤灰熔... 详细信息

淮南煤煤灰熔融温度高导致其无法直接在气流床气化炉上使用,将淮南煤ZA煤分别与低灰熔融温度内蒙古煤ZB煤和ZC煤按照1∶9,2∶8,3∶7,4∶6,5∶5,6∶4,7∶3,8∶2,9∶1的质量比进行配煤,利用智能灰熔点测定仪(封碳法)对单煤及其配煤煤灰熔融温度进行测定,探究配煤比对煤灰熔融温度的影响,基于热力学平衡计算结果(利用FactSage 8.1软件计算)探讨了配煤煤灰熔融温度变化机理;利用热重分析仪(TGA)对单煤煤焦和配煤煤焦的CO_(2)气化反应性进行测定,并对反应动力学进行分析。结果表明:ZA煤灰在高温下生成莫来石是其熔融温度高的主要原因。ZA煤分别与ZB煤和ZC煤相配后,煤灰中莫来石含量降低,低熔点的钙长石、镁堇青石含量增加,使得配煤煤灰熔融温度降低。ZA煤焦、ZB煤焦和ZC煤焦三种煤焦的平均CO_(2)气化反应速率分别为2.54%/min,3.49%/min和4.19%/min,ZA煤焦与CO_(2)的气化反应最难发生,平均气化反应速率最小,ZC煤焦的CO_(2)气化反应最容易,平均反应速率最大。与单煤煤焦相比,配煤煤焦气化反应过程呈现先促进后抑制的作用。三种单煤煤焦CO_(2)气化反应活化能位于336.8 kJ/mol~405.0 kJ/mol之间,AB2(ZA煤与ZB煤的质量比为2∶8)煤焦和AC3(ZA煤与ZC煤的质量比为3∶7)煤焦的CO_(2)气化反应活化能与ZB煤焦的CO_(2)气化反应活化能和ZC煤焦的CO_(2)气化反应活化能基本一致,表明配煤降低了配煤煤焦中ZA煤焦的CO_(2)气化反应活化能。

关键词：淮南煤配煤热力学平衡计算灰熔融温度气化反应性

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Event-Triggered Robust Practical Output Regulation for a Class of Linear Minimum-Phase Systems

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Event-Triggered Robust Practical Output Regulation for a Cla...

济南市女性随迁老人孤独感现状及其影响因素研究

第36届中国控制会议

作者： Wei liu jie Huang Department of Mechanical and Automation Engineering The Chinese University of Hong Kong

ISBN: (纸本)9781538629185

In this paper, we first formulate the event-triggered robust practical output regulation problem for a class of linear minimum-phase systems. The problem formulation requires the solution to the closed-loop system exist for all t ≥ 0, thus ruling out the possibility of the Zeno behavior, and the steady-state tracking error be made arbitrarily small. Then, we present the solvability of the problem by appropriately designing an output-based event-triggered control law and an output-based eventtriggered mechanism.

关键词： Output regulation event-triggered control linear systems

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现代预防医学 2024年第6期51卷 1050-1056页

作者：许静姜晓栩李荷宪周晟宇庞明丽王洁茹孔凡磊山东大学公共卫生学院卫生管理与政策研究中心国家卫生健康委员会卫生经济与政策研究重点实验室(山东大学) 安徽医科大学第一附属医院医务处

目的本研究旨在探究济南市女性随迁老人的孤独感现状及其影响因素，在此基础上提出缓解女性随迁老人孤独感的对策和建议。方法本研究数据来源于2020年在山东省济南市开展的随迁老人调查，采用多阶段整群随机抽样法获得有效女性随迁老... 详细信息

目的本研究旨在探究济南市女性随迁老人的孤独感现状及其影响因素，在此基础上提出缓解女性随迁老人孤独感的对策和建议。方法本研究数据来源于2020年在山东省济南市开展的随迁老人调查，采用多阶段整群随机抽样法获得有效女性随迁老人样本共418个；ULS-8量表用于测量女性随迁老人的孤独感，社会支持评定量表(SSRS)用于测量女性随迁老人的社会支持状况；t检验和单因素方差分析用于检验不同特征女性随迁老人的孤独感得分差异，多元线性回归模型用于探究女性随迁老人孤独感的影响因素。结果有371(88.8%)名女性随迁老人来自农村，有369(88.3%)名女性随迁老人为了照顾孙辈随迁，女性随迁老人的社会支持得分为(39.5±6.0)分，孤独感得分为(12.9±4.0)分，孤独感的影响因素包括：个人月收入(β=-0.17,P<0.001,95%CI:-3.337～-1.007)、随迁户口类型(β=-0.12,P=0.008,95%CI:-2.523～-0.385)、随迁年份(β=-0.09,P=0.042,95%CI:-2.155～-0.038)、对自己成为本地人的看法(β=-0.17,P=0.018,95%CI:0.267～2.840),社区广场舞(β=-0.18,P<0.001,95%CI:-3.614～-1.092)和社区组织的活动的参与频率(β=-0.13,P=0.013,95%CI:-2.636～-0.306)以及社会支持(β=-0.19,P<0.001,95%CI:-0.186～-0.064)。结论女性随迁老人的孤独感水平低于女性空巢老人，但高于普通男性老人，为缓解女性随迁老人的孤独感，需要女性随迁老人所在社区、女性随迁老人的家庭成员以及女性随迁老人自身共同做出努力。

关键词：流动人口女性随迁老人孤独感影响因素

Jointly optimized congestion control, forwarding strategy,and link scheduling in a named-data multihop wireless network

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Frontiers of Information Technology & Electronic Engineering 2017年第10期18卷 1573-1590页

作者： Cheng-cheng LI Ren-chao XIE Tao HUANG Yun-jie liu State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing Advanced Innovation Center for Future Internet Technology Beijing University of Technology

As a promising future network architecture, named data networking(NDN) has been widely considered as a very appropriate network protocol for the multihop wireless network(MWN). In named-data MWNs, congestion control is a critical issue. Independent optimization for congestion control may cause severe performance degradation if it can not cooperate well with protocols in other layers. Cross-layer congestion control is a potential method to enhance performance. There have been many cross-layer congestion control mechanisms for MWN with Internet Protocol(IP). However, these cross-layer mechanisms for MWNs with IP are not applicable to named-data MWNs because the communication characteristics of NDN are different from those of IP. In this paper, we study the joint congestion control, forwarding strategy, and link scheduling problem for named-data MWNs. The problem is modeled as a network utility maximization(NUM) problem. Based on the approximate subgradient algorithm, we propose an algorithm called ‘jointly optimized congestion control, forwarding strategy, and link scheduling(JOCFS)'to solve the NUM problem distributively and iteratively. To the best of our knowledge, our proposal is the first cross-layer congestion control mechanism for named-data MWNs. By comparison with the existing congestion control mechanism, JOCFS can achieve a better performance in terms of network throughput, fairness, and the pending interest table(PIT) size.

关键词： Information-centric networking Congestion control Cross-layer design Multihop wireless network

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基于非靶代谢组学的糙皮侧耳子实体发育的关联物质及主要代谢通路分析

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菌物学报 2024年第2期43卷 56-70页

作者：刘芹师子文吴杰黄保梁雪迪崔筱胡素娟牛森园孔维丽河南省农业科学院食用菌研究所农业农村部黄淮海地区食用菌种质资源鉴定和利用重点实验室河南郑州450002 河南农业大学生命科学学院河南郑州450002 河南科技学院生命科学学院河南新乡453003

本研究采用代谢组学方法鉴定并分析了糙皮侧耳原基和刚分化的子实体中的小分子代谢物质,以期解析糙皮侧耳子实体形成和发育的潜在机制。糙皮侧耳原基和子实体中共鉴定出545种代谢物,包含酚酸、脂类、氨基酸及其衍生物、核苷酸及其衍生... 详细信息

本研究采用代谢组学方法鉴定并分析了糙皮侧耳原基和刚分化的子实体中的小分子代谢物质,以期解析糙皮侧耳子实体形成和发育的潜在机制。糙皮侧耳原基和子实体中共鉴定出545种代谢物,包含酚酸、脂类、氨基酸及其衍生物、核苷酸及其衍生物、有机酸、生物碱、单宁、木脂素和香豆素以及其他代谢物共9类。主成分分析(PCA)和正交偏最小二乘判别分析(OPLS-DA)表明糙皮侧耳原基和子实体中的代谢物质具有显著差异。以VIP≥1、fold change≥2或≤0.5为条件,共筛选到253种差异代谢物。调控通路分析结果显示差异物质涉及76条代谢途径,推测该菌通过色氨酸代谢,苯丙氨酸、酪氨酸和色氨酸的生物合成,赖氨酸降解,D-精氨酸和D-鸟氨酸代谢,生物素代谢,莨菪烷、哌啶和吡啶生物碱的生物合成,酪氨酸代谢,嘌呤代谢,丙酸代谢和异喹啉生物碱的生物合成等主要代谢通路完成物质的深度转化及调控。本研究为糙皮侧耳子实体发育机制的研究提供了一定的理论依据。

关键词：糙皮侧耳子实体发育代谢组学差异代谢物代谢通路

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Synchronization of Directed Complex Dynamical Networks based on Distributed Event-triggered Communications

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Enhanced thermal- and impact-initiated reactions of PTFE/Al energetic materials through ultrasonic-assisted core-shell construction

第26届中国控制与决策会议

作者： liu jie FAN ChunXia Academy of Automation Nanjing University of Posts and Telecommunications

ISBN: (纸本)9781479937066

This paper studies the problem of synchronization on a complex dynamical network where the nodes’ dynamics are nonlinear time-invariant systems and share a directed communication network. Firstly, we study the problem of synchronization on a directed network with physical links. An explicit Lyapunov function is constructed by using an appropriate matrix to derive the threshold of event generator. Then, the centralized event-triggered rule is achieved by using the set stability theory. Based on the centralized event-triggered rule, the distributed one is proposed to synchronize the directed complex network. The threshold of each event generator is composed of each node’s states rather than neighboring node’s. Finally, a numerical example is given to validate the correctness of the proposed synchronization criteria based on distributed event-triggered communication.

关键词： synchronization distributed directed topology Lyapunov function event-triggered

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Defence Technology（防务技术） 2022年第8期18卷 1362-1368页

作者： Zhou-yang Wu Jin-xu liu Song Zhang xian-qing liu Xiao Xu Wei-zhe Ma Shu-kui Li Chuan He School of Materials Science and Engineering Beijing Institute of TechnologyBeijing100081China Science and Technology on Transient Impact Laboratory No.208 Research Institute of China Ordnance Industries102202China Department of Materials Science and Engineering Shenzhen MSU-BIT UniversityShenzhen518172China

A facile and economical approach was developed for the large-scale production of powdered core-shell structured PTFE/Al (CS-PA) energetic materials through ultrasonic-assisted mixing. The low-cost micrometer-sized PTFE and Al particles were used as starting materials. Under high-power ultrasonic waves, the PTFE powder was dispersed into nano-to sub-micrometer-sized particles and then encapsulated the Al microparticles to form the core-shell structure. The heat of combustion, burning rate, and pressurization rate of the powdered CS-PA were measured. The thermal-initiated reaction behavior was further evaluated using thermogravimetry-differential scanning calorimetry. Subsequently, the bulk CS-PA with a uniform microstructure was obtained via cold isostatic pressing of the powdered CS-PA followed by vacuum sintering. For the bulk CS-PA, the quasi-static compression behavior was characterized, and the impact-initiated reaction processes were conducted using the Split Hopkinson Pressure Bar (SHPB) and evaluated by a high-speed camera. Compared to physically mixed PTFE/Al materials, the powdered and bulk CS-PA demonstrated enhanced thermal- and impact-initiated reaction characteristics respectively, proving the effectiveness of our approach for constructing core-shell structures.

关键词： PTFE/Al Core-shell structure Energetic materials Ultrasonic-assisted mixing

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Leader-following Consensus for Linear Discrete-Time Multi-agent Systems Subject to Static Networks

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Direct impacts and spatial spillovers:How does the multilateral resistance affect China-Africa agricultural trade?

第36届中国控制会议

作者： Junwei liu jie Huang Department of Mechanical and Automation Engineering The Chinese University of Hong Kong

ISBN: (纸本)9781538629185

The leader-following consensus problem for linear discrete-time multi-agent systems subject to static networks has been studied in the literature using H Riccati inequality design and H Riccati equation design,***,these methods involve some less tractable conditions and need to solve some type of Riccati equation or *** this paper,we further study the leader-following consensus problem for linear discrete-time multi-agent systems subject to static networks for the case where the leader system is marginally *** showing the Schur stability of some graph matrix,which can be viewed as the discrete-time counterpart of H matrix encountered in continuous-time leader-following consensus problem,we solve our problem with a straightforward method,which is the reminiscent of the same problem for continuous-time multi-agent systems.

关键词： Multi-agent systems discrete-time systems leader-following consensus cooperative control

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China Finance and Economic Review 2017年第1期6卷 95-114页

作者： Xie jie liu Xuezhi School of Economics Zhejiang Gongshang UniversityChina Department of Development Bank of Communications Headquarters School of Finance and Statistics East China Normal University

The changes of one region’s trade barriers will affect other regions’trade *** spatial correlations caused by explanatory variables also constitute another part of“the multilateral resistance”,which tend to be ignored in traditional gravity *** paper takes this inconsistency between theoretical basis and empirical analysis as the breakthrough point of research.A multilateral gravity model is built,which has the feature of generalized spatial ***,frontier techniques of spatial econometrics are used to construct an empirical equation,and to conduct an empirical analysis,which scientifically estimate the magnitudes of bilateral direct impacts and the magnitudes of spatial spillovers on multilateral *** decomposition of the effects that provides reference for the directional operations of trade policy shows as follows:The negative factors that have significant spatial spillover effects would bring about multilateral resistance on China-Africa agricultural trade,which are caused by relatively poor social and economic conditions,corruption,and ethnic conflicts in some African *** production may cause crowding-out effects on agriculture of neighboring *** addition,the conflicts between African countries would hinder the development of agricultural trade between China and African countries not only because they have negative direct impacts on China-African agricultural trade but also because they have significant spatial spillover *** China promotes China-Africa agricultural trade by means of investment or aid,China should pay close attention to some direct or indirect impacts on the stable development of the China-African agricultural trade,which are caused by factors such as the developments of non-agricultural industries,peace,cultural consensus and efficient government.

关键词： direct impacts spatial spillovers multilateral resistance China-Africa agricultural trade generalized spatial multilateral gravity model