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产业转型升级、城乡收入差距与居民消费

工业技术经济 2024年第1期43卷 93-101页

作者：王芳王景东南京财经大学经济学院南京210023 审计署审计干部教育学院南京211815

居民消费是畅通国内大循环的关键环节和重要引擎,产业转型升级优化了消费供给。本文实证分析了产业转型升级对居民消费的直接影响,以及通过城乡收入差距所产生的间接影响。研究发现,经济高质量发展期间,产业转型升级显著促进居民消费;... 详细信息

居民消费是畅通国内大循环的关键环节和重要引擎,产业转型升级优化了消费供给。本文实证分析了产业转型升级对居民消费的直接影响,以及通过城乡收入差距所产生的间接影响。研究发现,经济高质量发展期间,产业转型升级显著促进居民消费;城乡收入差距在产业转型升级和居民消费间的中介效应显著,产业转型升级会通过缩小城乡收入差距间接促进居民消费;产业转型升级对居民消费的影响以及城乡收入差距的中介效应均存在区域异质性,西部地区的直接影响和中介影响均强于中部和东部地区。因此,应该通过供给侧为居民提供丰富、高质量的商品,满足人民日益增长的消费需求;通过产业转型升级带动就业,提高劳动力收入,缩小城乡收入差距,同时积极防范部分地区在实施产业转型升级政策时出现扩大城乡收入差距等问题。

关键词：产业转型产业升级城乡收入差距居民消费中介效应共同富裕

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煤矿粉尘危害及防控治理技术研究进展

煤化工 2024年第4期52卷 53-56,72页

作者：王静东西安航空职业技术学院航空维修工程学院陕西西安710000

煤矿粉尘不仅对煤矿工人身体健康造成影响,还在一定程度上影响煤矿开采安全。介绍了煤矿粉尘的分类;分析了煤矿粉尘的危害;综述了煤层注水、喷雾降尘、化学除尘、泡沫抑尘等几种目前使用最为广泛的除尘、降尘技术的研究进展;基于现有技... 详细信息

煤矿粉尘不仅对煤矿工人身体健康造成影响,还在一定程度上影响煤矿开采安全。介绍了煤矿粉尘的分类;分析了煤矿粉尘的危害;综述了煤层注水、喷雾降尘、化学除尘、泡沫抑尘等几种目前使用最为广泛的除尘、降尘技术的研究进展;基于现有技术的不足,在除尘设备智能化、集成化,粉尘防控技术精准化,智慧除尘体系建设三个方面展望了煤矿粉尘防治技术的发展趋势。

关键词：煤矿粉尘危害煤层注水喷雾降尘化学除尘泡沫抑尘

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基于AISM的建筑产业化制约因素研究

山西建筑 2024年第2期50卷 195-198页

作者：王敬东张茗中铁一局集团市政环保工程有限公司甘肃兰州730050 中国铁路兰州局集团公司甘肃兰州730030

进行建筑产业化,大力发展装配式建筑是我国“十四五”期间建筑发展的基本方向。为了系统分析建筑产业化的制约因素,在大量文献阅读的基础上,筛选出18个制约因素,组建专家小组对因素评价打分,分析出18个因素间的相互制约关系,基于扩充算... 详细信息

进行建筑产业化,大力发展装配式建筑是我国“十四五”期间建筑发展的基本方向。为了系统分析建筑产业化的制约因素,在大量文献阅读的基础上,筛选出18个制约因素,组建专家小组对因素评价打分,分析出18个因素间的相互制约关系,基于扩充算法的对抗解释结构模型进行建模,通过一组对抗性的有向拓扑图对建筑产业化制约因素进行分析,得出因素间的相互关系和层级关系,明晰建筑产业化的直接制约因素、间接制约因素、根源制约因素,为建筑产业化的促进提供参考。

关键词：建筑产业化装配式建筑制约因素对抗解释结构模型

一种基于改进NLMS的多雷达主瓣干扰抑制方法

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现代电子技术 2024年第1期47卷 25-29页

作者：张二伟王久友汪敬东李永飞南京电子技术研究所江苏南京210039

远程探测场景下弹载主瓣干扰因与目标角度间隔小,单站抗干扰方法性能下降严重。多雷达通过合理布站可有效“分辨”目标和干扰,被认为是可有效抑制主瓣干扰的途径。针对当前多雷达抗主瓣干扰方法普遍存在收敛速度慢的问题,提出一种基于... 详细信息

远程探测场景下弹载主瓣干扰因与目标角度间隔小,单站抗干扰方法性能下降严重。多雷达通过合理布站可有效“分辨”目标和干扰,被认为是可有效抑制主瓣干扰的途径。针对当前多雷达抗主瓣干扰方法普遍存在收敛速度慢的问题,提出一种基于改进归一化最小均方(NLMS)的多雷达对消抗主瓣干扰方法,并通过理论推导给出了其应用条件。该方法通过定义消散因子实现对步长的自适应控制从而达到快速收敛的目的,仿真结果表明该方法在收敛速度及收敛后均方误差(MSE)上具有明显优势。最后通过外场试验进一步验证该方法的性能,在满足布站条件且干噪比≥30 dB的前提下,信噪比改善可达19 dB以上,具有较高的应用价值。

关键词：多雷达主瓣干扰干扰对消波达方向改进NLMS算法时延差信噪比

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Determining wind field and electric field by a barium release experiment in the ionosphere

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Science China Earth Sciences 2015年第7期58卷 1210-1215页

作者： XIE LiangHai LI Lei wang jingdong TAO Ran Center for Space Science and Applied Research Chinese Academy of Sciences

Barium release experiment is an effective way to study the near-earth environment, in which artificial plasma cloud is created via ionization of neutral gases released from a rocket or a satellite. The first barium release experiment in China was success- fully carried out by a sounding rocket at a height of about 190 km on April 5, 2013. The observed barium cloud images show that the neutral cloud follows a damping motion, whose velocity decreases exponentially and finally tends towards the wind velocity of the background. But for the ion cloud, the motion is controlled mainly by the Lorentz force and a ExB drift happens This work is devoted to calculating the wind and electric field of the background by analyzing the observed images from dif- ferent stations. It turns out that the wind has a magnitude of 51.28 m/s, which is mainly in the northeast direction but also has an appreciable vertical component; the ion cloud has a drift velocity of 71.38 m/s, with a large vertical velocity component be- sides the horizontal components, then the electric field is obtained from the drift velocity as 2.49 mV/m. It is interesting that the wind field shows a better agreement with GITM model than the other empirical or theoretical models, and the GITM model can also give a good prediction for the ion velocity observed by us, which is consistent with the ISR observation at Jicamarca as well.

关键词： active experiment barium release ionospheric electric field wind field

Joint salient object detection and existence prediction

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Frontiers of Computer Science 2019年第4期13卷 778-788页

作者： Huaizu JIANG Ming-Ming CHENG Shi-Jie LI Ali BORJI jingdong wang College of Information and Computer Sciences University of Massachusetts Amherst Amherst MA 01003 USA CCCE Nankai University Jinnan Campus Tianjin 300353 China Center for Research in Computer Vision University of Central Florida Orlando FL 32816 USA Microsoft Research Beijing 100080 China

Recent advances in supervised salient object detection modeling has resulted in significant performance improvements on benchmark datasets. However, most of the existing salient object detection models assume that at least one salient object exists in the input image. Such an assumption often leads to less appealing saliency maps on the background images with no salient object at all. Therefore, handling those cases can reduce the false positive rate of a model. In this paper, we propose a supervised learning approach for jointly addressing the salient object detection and existence prediction problems. Given a set of background-only images and images with salient objects, as well as their salient object annotations, we adopt the structural SVM framework and formulate the two problems jointly in a single integrated objective function: saliency labels of superpixels are involved in a classification term conditioned on the salient object existence variable, which in turn depends on both global image and regional saliency features and saliency labels assignments. The loss function also considers both image-level and regionlevel mis-classifications. Extensive evaluation on benchmark datasets validate the effectiveness of our proposed joint approach compared to the baseline and state-of-the-art models.

关键词： salient object detection existence prediction joint inference saliency detection

Isotopic characteristics of groundwater in Changzhou, Wuxi and Suzhou area and their implications

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Science China Earth Sciences 2008年第6期51卷 778-787页

作者： JIANG YueHua JIA JunYuan XU NaiZhen wang jingdong KANG XiaoJun Nanjing Institute of Geology and Mineral Resources Nanjing 210016China

Based on the study of groundwater isotope(2H and 18O, 34S, 15N, 3H, 14C) in Changzhou, Wuxi and Suzhou area, it is found that the deep confined groundwater has no pollution on the whole, whereas the shallow groundwater is polluted to a different degree in the area. The deep confined aquifers (main exploitation aquifers) in Changzhou area and in Wuxi and Suzhou area likely belong to two different aquifers. The main exploitation aquifers in Changzhou area are not connected with those in Wuxi and Suzhou area, or they are connected but not expedited. The lateral run-off of groundwater is at present directed to the exploitation center because of overexploitation of the deep groundwater for a long time, but the flowing speed of groundwater is still extremely slow. The deep confined groundwater is in a close to half close state. The 14C age of groundwater varies from 10000 a BP to 38000 a BP, with the oldest groundwater found at the nearest exploitation center (along the line of three cities of Changzhou, Wuxi and Suzhou) and the youngest at the furthest exploitation center.

关键词： Changzhou-Wuxi-Suzhou area groundwater isotope

Role of primary Zr-rich particles on microstructure and magnetic properties of 2:17-type Sm-Co-Fe-Cu-Zr permanent magnets

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Journal of Materials Science & Technology 2020年第18期52卷 73-81页

作者： Tao Yuan Xin Song Xianglong Zhou Wentao Jia Munzali Musa jingdong wang Tianyu Ma Frontier Institute of Science and Technology State Key Laboratory for Mechanical Behavior of Materialsand MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed MatterXi'an Jiaotong UniversityXi'an710049China The Southwest Applied Magnetism Research Institute Mianyang621000China

Trace Zr addition is essential for achieving desired cellular nanostructure and large coercivity in the pinning-controlled 2:17-type Sm-Co-Fe-Cu-Zr magnets that have served as the strongest high temperature permanent magnets for over 40 ***,accompanying this is the formation of Zr-rich particles that may deteriorate the hard magnetic *** the formerly-reported 1:3R Zr-rich platelets,in this work,1–2μm sized Zr6(Co,Fe)23(6:23)particles(Fm 3 m)and 100–200 nm sized 1:3R Zr-rich particles were also found based on combined structural identifications and element mapping *** such particles,the desired 1:5H cell wall precipitates that provide the strongest pinning force of magnetic domain wall motions are rare,forming the precipitate-free-zones(PFZs).The 1:5H-PFZs and the soft magnetism of both 6:23 and 1:3R Zr-rich particles act as local weak pinning points,which are unfavorable to retain the large magnetization in strong opposite fields and lead to poor *** observed in a Sm25Co45.9Fe19.5Cu5.6Zr4.0(wt.%)magnet,the co-existence of such Zr-rich particles and the associated 1:5H-PFZs leads to a pretty low squareness factor of only 52.89%given the large coercivity of 29.04 *** findings suggest that careful controlling the Zr content and avoiding its aggregation to form harmful 6:23 and 1:3R Zr-rich particles are essential for achieving high squareness as well as large energy product in the Sm-Co-Fe-Cu-Zr permanent magnets.

关键词： Permanent magnets Sm-Co alloys Microstructure Precipitates

Microstructure Evolution and Tensile Properties of Pure Ti Subjected to Rapidly Heating and Quenching

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Journal of Materials Science & Technology 2006年第2期22卷 190-194页

作者： Weisong ZHAO Wei ZHANG Jinyu GUO Boquan wang jingdong GUO Ke LU Shenyang National Laboratory for Materials-Science Institute of Metal Research Chinese Academy of SciencesShenyang 110016 China

The pure α-Ti samples were heated at an extremely high rate （～10^6 K/s） to the temperature of β phase zone followed by a rapidly quenching in an electro-pulsing treatment. After the treatment, micrometer-thick lamellar substructures were generated within the original equiaxed α-Ti coarse grains. Misorientations across adjacent lamellae are of a few degrees. The ultrafine lamellar substructures originated from a non-equilibrium α-β-α’ phase transformation during rapidly heating-quenching process with a short exposure time at high temperatures. Tensile strength was increased by about 100 MPa due to the formation of the ultrafine lamellar substructure while the same tensile plasticity （elongation-to-failure） was maintained relative to the original sample. The strengthening effect could be attributed to the effective blockage of dislocation motions by a high density of sub-boundaries.

关键词： Pure Ti Microstructure Properties Rapidly heating