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扩大中等收入群体路径探析——基于随机森林模型画像

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统计研究 2024年第6期41卷 3-17页

作者：李金昌潘美莹任志远浙江财经大学中国统计学会中国统计教育学会浙江财经大学数据科学学院浙江财经大学-中国社会科学院大学浙江研究院

本文将扩大中等收入群体对象细分为“提低、入中、稳中”三个层级,运用随机森林模型对不同收入群体的特征进行画像,基于特征指标重要度排序确定影响各收入群体的主要因素,进而设计差异化扩中路径。研究发现,年龄、工资性收入、经营性收... 详细信息

本文将扩大中等收入群体对象细分为“提低、入中、稳中”三个层级,运用随机森林模型对不同收入群体的特征进行画像,基于特征指标重要度排序确定影响各收入群体的主要因素,进而设计差异化扩中路径。研究发现,年龄、工资性收入、经营性收入和转移性收入在偏低收入群体与潜在中等收入群体之间呈现较大的分布差异,是“提低”环节需要重点关注的特征;食品支出、居住支出、交通通讯支出、教育文化娱乐支出和其他支出对推动潜在中等收入群体越级、实现低收入者“入中”有显著影响;受教育程度、社会参与和家庭规模与新增中等收入群体脆弱性程度紧密相关,是巩固扩中成果必须考虑的因素;医疗保健支出、衣着支出、社会公平、社会信任、职业类型、家庭劳动力占比和生活困难则在低收入群体向中等收入行列迈进的全过程均有重要作用。应该建立科学的政策扶持机制,分类制定差异化政策,打造以保障劳动报酬和转移收入为基石、以激活经营和财产收入与社会参与为支撑、以优化教育水平与家庭劳动结构为牵引、以提升消费层次与生活质量为导向的多层次、立体化扩中平台。

关键词：共同富裕扩大中等收入群体随机森林特征画像

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面向韧性拓扑构造的无人机集群功率分配策略

西安电子科技大学学报 2024年第2期51卷 28-45页

作者：胡嘉琳任智源刘安妮程文驰梁晓东李少波西安电子科技大学空天地一体化综合业务网全国重点实验室陕西西安710071 中国电子科技集团公司第五十四研究所河北石家庄050081 河北省光子信息技术与应用重点实验室河北石家庄050081

针对无人机作战网络因自身内部故障或受到敌方攻击干扰而造成的网络性能下降及网络瘫痪问题,提出了一种基于功率分配的强韧性无人机作战网络拓扑构造方法。该方法首先以边连通度作为网络的韧性指标;其次,基于最大流最小割定理将最小割... 详细信息

针对无人机作战网络因自身内部故障或受到敌方攻击干扰而造成的网络性能下降及网络瘫痪问题,提出了一种基于功率分配的强韧性无人机作战网络拓扑构造方法。该方法首先以边连通度作为网络的韧性指标;其次,基于最大流最小割定理将最小割作为韧性指标的测度;在此基础上,考虑到单架无人机及系统整体功率有限,从物理层角度出发,通过调节无人机节点的发射功率以构造拓扑,从而提高网络韧性,提出了功率约束下的无人机作战网络功率分配策略;最后,采用粒子群优化算法解决功率约束下的拓扑结构韧性优化问题。仿真结果表明,在相同的调制方式及功率约束下,面对链路失效模式和节点失效模式,对比其它功率分配算法,基于粒子群优化算法得到的功率分配方案能有效提高无人机作战网络韧性,其所构建的网络在约66.7%的链路失效情况下,平均业务成功到达率仍保持在95%以上,满足实际作战需求。

关键词：无人机韧性最小割约束优化

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Path Computing Scheme with Low-Latency and Low-Power in Hybrid Cloud-Fog Network for IIoT

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China Communications 2023年第8期20卷 1-16页

作者： Jijun ren Peng Zhu zhiyuan ren School of Communications and Information Engineering Xi’an University of Posts&TelecommunicationsShaanxi 710061China State Key Laboratory of Integrated Services Networks Xidian UniversityShaanxi 710071China

With the rapid development of the Industrial Internet of Things(IIoT),the traditional centralized cloud processing model has encountered the challenges of high communication latency and high energy consumption in handling industrial big data *** paper aims to propose a low-latency and lowenergy path computing scheme for the above *** scheme is based on the cloud-fog network *** computing resources of fog network devices in the fog computing layer are used to complete task processing step by step during the data interaction from industrial field devices to the cloud center.A collaborative scheduling strategy based on the particle diversity discrete binary particle swarm optimization(PDBPSO)algorithm is proposed to deploy manufacturing tasks to the fog computing layer *** task in the form of a directed acyclic graph(DAG)is mapped to a factory fog network in the form of an undirected graph(UG)to find the appropriate computing path for the task,significantly reducing the task processing latency under energy consumption *** experiments show that this scheme’s latency performance outperforms the strategy that tasks are wholly offloaded to the cloud and the strategy that tasks are entirely offloaded to the edge equipment.

关键词： collaborative offloading strategy cloudfog network architecture industrial internet of things path computing PDBPSO

Evolution of convex structure during counter-rotating electrochemical machining based on kinematic modeling

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Chinese Journal of Aeronautics 2021年第3期34卷 39-49页

作者： Wenjian CAO Dengyong WANG zhiyuan ren Di ZHU College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China Jiangsu Key Laboratory of Precision and Micro-Manufacturing Technology Nanjing 210016China

Counter-rotating electrochemical machining(CRECM)is a novel electrochemical machining(ECM)method,which can be used to machine convex structures with complex shapes on the outer surface of *** this study,the evolution of the convex structure during CRECM is *** complex motion form of CRECM is replaced by an equivalent kinematic model,in which the movement of the cathode tool is realized by matrix *** trajectory of the cathode tool center satisfies the Archimedes spiral equation,and the feed depth in adjacent cycles is a *** simulation results show that the variations of five quality indexes for the convex structure:as machining time increases,the height increases linearly,and the width reduces linearly,the fillets at the top and root fit the rational function,and the inclination angle of the convex satisfies the exponential *** current density distributions with different rotation angles is *** to the differential distribution of current density on workpiece surface,the convex is manufactured with the cathode window transferring into and out of the processing *** results agree very well with the simulation,which indicates that the proposed model is effective for prediction the evolution of the convex structure in CRECM.

关键词： Convex structure Counter-rotating electrochemical machining Current density Equivalent kinematic model Material removal

Optimizing the cleanliness in multi-segment disk amplifiers based on vector flow schemes

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High Power Laser Science and Engineering 2018年第1期6卷 1-6页

作者： zhiyuan ren Jianqiang Zhu Zhigang Liu Xiaowei Yang Key Laboratory on High Power Laser and Physics Shanghai Institute of Optics and Fine Mechanics Chinese Academy of SciencesShanghai 201800 China

The objective of maintaining the cleanliness of the multi-segment disk amplifier in Shenguang-II(SG-II) is to reduce laser-induced damage for optics. The flow field of clean gas, which is used for the transportation of contaminant particles,is a key factor affecting the cleanliness level in the multi-segment disk amplifier. We developed a gas–solid coupling and three-dimensional flow numerical simulation model. The three-dimensional and two-phase flow model is verified by the flow-field smog experiment and the particle concentration measurement experiment with the 130-disk amplifier in SG-II. By optimizing the boundary conditions with the same flow rate, the multi-inlet vector flow scheme can not only effectively reduce the purging time, but also prevent the reverse diffusion of contaminant particles in the multi-segment disk amplifier and the deposition of contaminant particles on the surface of the Nd:glass.

关键词： cleanliness computational fluid dynamics flow field multi-segment disk amplifier vector flow

Electrochemical behavior of Ti-6.5Al-2Zr-1Mo-1V alloy under rotating condition with periodically fluctuating current density

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Chinese Journal of Aeronautics 2022年第5期35卷 484-496页

作者： zhiyuan ren Dengyong WANG Juchen ZHANG Huayong LE Di ZHU College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China Jiangsu Key Laboratory of Precision and Micro-Manufacturing Technology Nanjing 210016China School of Mechanical Engineering Hefei University of TechnologyHefei 230009China

Titanium alloy plays a crucial role in the electrochemical field due to its excellent corrosion *** passivation and dissolution behaviors of Ti-6.5Al-2Zr-1Mo-1V(TA15)alloy in Na Cl solution were studied by simulating the electrochemical machining process in a rotating condition,which made the anode in a state with alternating high and low current *** probe micro analysis,ultra-depth microscope,scanning electron microscope,and X-ray photoelectron spectrometer were used to reveal the evolution of TA15 under fluctuating current *** existence state of the passivation film on TA15 surface was closely related to the pulse frequency of the periodically fluctuating current *** higher pulse frequency of 0.20 Hz,the material was hardly dissolved because passivation dominated the electrolysis behavior,while at lower pulse frequency of 0.01 Hz,the passivation and dissolution behaviors occurred alternately with the variation of the current ***,the thickness of the passivation film was inversely proportional to the applied current *** to the different electrochemical characteristics of a phase andβphase,the surface of the TA15 changed from being smooth to porous after a *** addition,the change of microstructure affected the content of O^(2–)and exposed the suboxides of *** a word,the change of pulse frequency and current density affected the electrochemical behavior of TA15,which was different from the conventional steady condition.

关键词： Dissolution Electrochemical behavior Passivation Rotating condition Ti-6.5Al-2Zr-1Mo-1V alloy

A high power efficiency method using orthogonal signal decomposition in high PAPR system

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Science China(Information Sciences) 2013年第4期56卷 173-179页

作者： ren zhiyuan LI YongZhao ZHANG HaiLin HAN Kun State Key Laboratory of Integrated Services Network Xidian University Xi'an Communication Institute

To solve the low-power-efficiency problem for high peak to average power ratio systems,such as OFDM,an orthogonal inhomogeneous signal decomposition approach is proposed in this *** novel method decomposes the signal into branch signals orthogonally,which can adapt to the change of saturate power of each branch power ***,the novel method has the advantages of both high power efficiency of power amplifier and low PAPR of branch ***,this is more suitable for practical *** simulation results indicate that the proposed method can increase the power efficiency remarkably without reducing the BER performance in the receiver.

关键词： green radio power amplifier orthogonal inhomogeneous signal decomposed power efficiency energy conservation

A Novel Load Balancing Strategy of Software-Defined Cloud/Fog Networking in the Internet of Vehicles

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China Communications 2016年第S2期13卷 140-149页

作者： Xiuli He zhiyuan ren Chenhua Shi Jian Fang The State Key Laboratory of ISN in School of Telecommunications Engineering No.2 South Taibai Road Yan Ta DistrictXidian University The State Radio Monitoring Center and Testing Center

The Internet of Vehicles(IoV)has been widely researched in recent years,and cloud computing has been one of the key technologies in the *** cloud computing provides high performance compute,storage and networking services,the IoV still suffers with high processing latency,less mobility support and location *** this paper,we integrate fog computing and software defined networking(SDN) to address those *** computing extends computing and storing to the edge of the network,which could decrease latency remarkably in addition to enable mobility support and location ***,SDN provides flexible centralized control and global knowledge to the *** order to apply the software defined cloud/fog networking(SDCFN) architecture in the IoV effectively,we propose a novel SDN-based modified constrained optimization particle swarm optimization(MPSO-CO) algorithm which uses the reverse of the flight of mutation particles and linear decrease inertia weight to enhance the performance of constrained optimization particle swarm optimization(PSO-CO).The simulation results indicate that the SDN-based MPSO-CO algorithm could effectively decrease the latency and improve the quality of service(QoS) in the SDCFN architecture.

关键词： internet of vehicles cloud computing cloud/fog network software defined networking load balancing

Hazard analysis of tsunami disaster on the Maritime Silk Road

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Acta Oceanologica Sinica 2020年第1期39卷 74-82页

作者： Jingming Hou Xiaojuan Li Peitao Wang Juncheng Wang zhiyuan ren National Marine Environmental Forecasting Center Beijing 100081China College of Resource Environment and Tourism Capital Normal UniversityBeijing 100048China Key Laboratory of Research on Marine Hazards Forecasting State Oceanic AdministrationBeijing 100081China

The Maritime Silk Road is not only a passageway for business and trade, but also the road of friendship between eastern and western civilizations. The Indian Ocean tsunami in 2004 caused major damage to several coastal countries. Tsunami occurrence regularity and hazard analysis are needed to ensure economic and cultural exchange on the Maritime Silk Road. To explore and identify tsunami hazard on the Maritime Silk Road, the spatial and temporal characteristics of historical tsunami events were given out. Some useful information hidden in historical tsunamis was searched from source parameters, such as seismic magnitude, focal depth and water depth. The tsunami possibility in the case of earthquake occurrence was also studied, exploring the probability of tsunami caused by different magnitudes. The analysis result shows that tsunamis on the Maritime Silk Road mainly occurred in 8 major tectonic faults, each of which has different tsunami occurrence regularity. On the basis of statistical analysis, a numerical model was used to simulate the potential tsunamis and show the tsunami hazard levels along the coast of Maritime Silk Road. The research results of this paper can help the tsunami early warning and ensure the safety of economic and cultural exchanges on the Maritime Silk Road.

关键词： tsunami occurrence regularity hazard Maritime Silk Road