Subjects: Psychology >> Personality Psychology Subjects: Psychology >> Clinical and Counseling Psychology submitted time 2021-03-30
Abstract: Quiet ego is a kind of identity that neither pays too much attention to self nor others, integrating with others without losing self. It is beneficial to individual’s physical and mental health, especially to improve the individual's subjective well-being, self-rated health, and the reduction of materialism. A quiet ego could be promoted by mindfulness and meditation. By summarizing the concept of quiet ego, the perspective of growth and balance, the measuring method, the influence of quiet ego on mental health and the related research results on how to promote quiet self, this paper holds that quiet ego is essentially the balance and integration of self in space and time dimensions. At present, there have been many researches about quiet ego, but as a relatively new research field, the localization, systematization, development, and promotion of the quiet ego should be discussed in the future "
Peer Review Status:Awaiting Review
Subjects: Astronomy >> Astrophysical processes submitted time 2021-03-30 Cooperative journals: 《天文研究与技术》
Abstract:针对超宽带及多波束接收系统海量天文信号实时高效传输与处理问题,对基于FPGA+GPU的主流终端设备软件系统进行了测试分析,超宽带接收设备要求终端系统软件能够在更宽带宽,更高时间、频率分辨率条件下,实现实时数据流传输与处理。结合大口径射电观测设备未来发展方向提出了利用高速并行环形缓冲区实现数据流缓存、基于GPU集群实现数据流实时处理、基于BeeGFS实现分布式并行数据存储,模块化构建射电天文信号传输管道软件的设计思路。
Subjects: Astronomy >> Astrophysical processes submitted time 2021-03-30 Cooperative journals: 《天文研究与技术》
Abstract:地基雷达天文观测可以提供太阳系天体目标的地形地貌、物理特征、轨道动力等信息。文章聚焦利用地基雷达天文技术开展月球观测的原理方法和科学意义,介绍了基于我国现有深空雷达上行装置、射电望远镜条件、以及非相干散射雷达等系统,初步开展的UHF频段和X频段的地基雷达观测月球试验。通过月球反射回波的信号处理,获得了延迟、多普勒频移等参数,得到了一致的与近表层物质密度相关的月面雷达反射率,并得到了月球的左右旋圆极化率,其反映了与波长同尺度的月球近表层结构。文章积累的数据处理经验将为我国的小行星预警、行星历表等地基雷达天文观测研究提供技术基础。
Subjects: Astronomy >> Astrophysical processes submitted time 2021-03-30 Cooperative journals: 《天文研究与技术》
Abstract:快速傅里叶变换比傅里叶变换有更好的算法性能,是射电干涉成像基础算法,但因为天线阵列的不规则采样,需使用网格化算法将可见度数据重采样到规则的网格上,才能应用快速傅里叶变换。基于卷积的网格化计算具有计算密集型和迭代型的特点,特别是在处理海量可见度数据的情况下,高性能的网格化计算对加速整个成像过程就显得尤为重要。为了缓解数据处理的压力,在现有处理整块数据和支持多核计算的算法基础上,拓展应用Dask并行计算框架,不仅将数据分块并分配到多线程上,提高数值计算效率,而且动态的分布式任务调度策略优化了网格化的实时处理。实验结果表明多核CPU利用率显著提高,即使增加数据量,也能进一步提升网格化算法性能。分布式任务调度能够将(单)多测量集的网格化弹性缩放到(单)多机系统,充分发挥了集群的规模化优势。
Subjects: Astronomy >> Astrophysical processes submitted time 2021-03-30 Cooperative journals: 《天文研究与技术》
Abstract:W波段接收机系统能有效接收多条射电天文观测重要分子谱线信息,对于天文观测和科学研究有重要意义。W波段正交模耦合器(Ortho-mode Transducer)作为接收机系统实现极化分离的关键器件,其性能对接收机整体性能有重要影响。本文介绍了一款基于Boifot结构的W波段宽带正交模耦合器,并介绍了OMT的工作原理和设计流程。仿真结果表明,在70-116GHz频带内,OMT相对带宽达到49.4%,回波损耗优于-18.7dB,交叉极化优于-55.8dB,端口隔离度优于-54dB。
Subjects: Astronomy >> Astrophysical processes submitted time 2021-03-30 Cooperative journals: 《天文研究与技术》
Abstract:脉冲星周期跃变是一种罕见的现象,是研究其内部结构的探针。针对2019年2月至12月,国家授时中心昊平观测站40米射电望远镜在脉冲星计时观测中,监测Crab脉冲星的数据,采用脉冲星计时方法,用TEMPO2拟合程序进行分析。结果表明Crab脉冲星在2019年7月23日(MJD58687)附近发生了一次周期跃变现象,该跃变自转增量为 ∆vg = 5.33(4)×10-7 Hz,自转变化量为 ∆vg /v = 17.9(1)×10-9 ,并伴随着恢复系数Q ~ 0.88的指数恢复过程。此次Crab脉冲星周期跃变的监测及处理,证实了国家授时中心40米射电望远镜对脉冲星的监测性能,同时为研究周期跃变的产生机理积累了样本。
Subjects: Astronomy >> Astrophysical processes submitted time 2021-03-30 Cooperative journals: 《天文研究与技术》
Abstract:毫秒脉冲星对引力波探测、太空导航等方面具有重要意义。本文通过引证ATNF数据库,指出双星系统与毫秒脉冲星存在密切关系。分析了FAST早期科学数据中心脉冲双星搜索能力的现状,目前Ransom版本的accelsearch算法虽在CPU上进行了高度优化,但在FAST庞大数据量下,仍十分耗费算力。罗晋涛GPU版本的加速度搜索带来6-8倍的加速效果,但未能针对GPU内存进行有效优化。本文先概述脉冲双星及其轨道运动对信号处理带来的影响,然后引出相应的搜索技术及原理,为提高脉冲双星的搜索效率,利用并行化技术编写程序对GPU版本的加速度搜索进行优化。结果表明,使用不同zmax参数对不同.dat文件进行处理,速度均有明显提升。
Subjects: Astronomy >> Astrophysical processes submitted time 2021-03-29 Cooperative journals: 《天文研究与技术》
Abstract:天体随时间的光度变化能够反映其物理性质,高精度测光技术的研究帮助我们更好地分析与探究天体的光变情况,对天体的演化研究有重要意义。本文介绍了相关的测光工具与技术,探索了把MaxIm DL软件与photutils测光库相结合的测光技术及其应用,提出了连续图像中各星像测光数据快速匹配的解决方案。通过分析中国科学院云南天文台1m光学望远镜拍摄的M35星团图像,本文发现了相对测光中存在精度回报(precision premium)现象,即相近的两颗星进行相对测光具有更高的测量精度,且该现象的显著程度与大气质量相关。针对于相对测光的精度回报现象,本文提出了高精度相对测光的参考方法。
Subjects: Materials Science >> Nanoscience and Nanotechnology submitted time 2021-03-26
Abstract: Solar stills have attracted increasing attentions in recent years due to its ability of simple construction and eco-friendly. In this study, the weighted values of environment factors on evaporation efficiency are obtained by using a well-established machine learning algorithm, random forest. To test the advancement between random forest and mathematical data analysis, two traditional data science methods, pair wise plots and Pearson correlation analysis, were conducted for comparison. Experimental data used in analysis were collected from around 100 articles since 2014. The results indicated that thermal design was the most significant factor that contributes in high-efficiency solar evaporation. It will promote the studies on evaporation efficiency solar stills. "
Peer Review Status:Awaiting Review
Subjects: Psychology >> Applied Psychology Subjects: Psychology >> Clinical and Counseling Psychology submitted time 2021-03-26
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Peer Review Status:Awaiting Review
Subjects: Psychology >> Applied Psychology submitted time 2021-03-25
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Peer Review Status:Awaiting Review
Subjects: Physics >> Interdisciplinary Physics and Related Areas of Science and Technology submitted time 2021-03-24
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Peer Review Status:Awaiting Review
Subjects: Psychology >> Physiological Psychology submitted time 2021-03-23
Abstract: " Growing studies have reported the alternations of the cortico-basal ganglia-corticothalamic loops and insular networks, which belong to the sensorimotor system, might be responsible for the clinical symptoms and cognitive deficits in schizophrenes. However, the mainstream researches and clinical treatments have focused on the abnormity of high-leveled brain regions and paid little attention to the primary sensorimotor system in schizophrenes. Relevant studies have revealed the dance training could promote the cortico-basal ganglia-corticothalamic loops and insular networks, which would improve the advanced brain functions. It indicates the dance training might be an efficient treatment for the schizophrenia and the related cognitive deficits. Based on multimodal magnetic resonance imaging technology, this study focuses on the sensorimotor network of schizophrenia. It aims to reveal the neuro mechanism of the dance training effects on schizophrenia, in a way of integrative analyzation involving the image/clinical/cognitive data pre-and post- intervention.
Peer Review Status:Awaiting Review
Subjects: Information Science and Systems Science >> Basic Disciplines of Information Science and Systems Science submitted time 2021-03-23
Abstract: " Dempster-Shafer evidence theory, as an extension of Probability theory, is widely used in the field of information fusion due to it satisfies weaker conditions than probability theory in dealing with uncertain information. Nevertheless , the description space of the current evidence theory is only a real space, and it cannot effectively describe and process the uncertain information in the face of multidimensional characteristic data and periodic data with phase angle changes. Based on this gap , in this paper, Dempster-Shafer evidence theory is extended to the complex Dempster-Shafer evidence theory. In complex Dempster-Shafer evidence theory, mass function that used to describe the uncertain information extends from the real space to the complex space, named as complex mass function, and the modulus of the mass function indicates the degree of support for the proposition. On this basis, other basic concepts used to describe uncertainty information are also defined and discussed, such as complex belief function, complex plausibility function, etc. In order to perfect the complex Dempster-Shafer evidence theory, the complex Dempster combination rule (CDCR) is supplemented. CDCR is an extension of Dempster combination rule (CDR), which satisfies the commutative and associative laws just as CDR does, and it can degenerate into CDR under certain condition. In addition, we propose a method to generate complex mass function and apply it to target recognition. The recognized results show that compared with the mass function of the real plane, the target recognition rate can be larger by using complex mass function to describe the uncertain information. "
Peer Review Status:Awaiting Review
Subjects: Physics >> General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. submitted time 2021-03-23
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Peer Review Status:Awaiting Review
Subjects: Psychology >> Social Psychology submitted time 2021-03-21
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Peer Review Status:Awaiting Review
Subjects: Psychology >> Medical Psychology submitted time 2021-03-21
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Peer Review Status:Awaiting Review
Subjects: Psychology >> Experimental Psychology submitted time 2021-03-19
Abstract: Abstract Panum’s limiting case is one of the simplest configurations in monocular regions, which is the breakthrough in the study of the stereopsis mechanism formed by the monocular occlusion region. This study focuses on the controversy of Panum’s limiting case on the origin of depth to carry out further research. The experiment uses a fixation point and quick representation of stimulation to investigate whether the subjects can correctly perceive the depth of fixation features and non-fixation features, and investigate whether the depth perceived by the subjects comes from depth contrast. The results show that the subjects can correctly perceive the depth of fixation features and non-fixation features regardless of Panum’s stimulation conditions or controlled stimulation conditions. Besides, the depth of the two features perceived by the subjects in the binocular fusion does not originate from the depth contrast, but from the double fusion. This experimental result suggests that the depth perception mechanism of Panum's limit case is more likely to be double fusion. "
Peer Review Status:Awaiting Review
Subjects: Agriculture, Forestry,Livestock & Aquatic Products Science >> Soil Science submitted time 2021-03-17
Abstract: Purpose Soil structures are the main course of the formation and development of collapsing gullies, which are the most severe type of erosion in south China. However, few studies have focused on the relationship between soil macropores, soil erosion, and local topography. This study aimed to quantify and compare soil properties and macropore characteristics in the collapsing gully region, and explore their influences on the formation and development of the associated erosion. Materials and methods Soil core columns at different positions of a typical collapsing gully were excavated, and then scanned to analyze soil macropores. Moreover, soil properties and saturated hydraulic conductivity were investigated in the laboratory and in the field, respectively. Results and discussion The results indicated that the sand content increased from the ridge to the slope and the valley, while silt and clay contents decreased for the same catena. The mean weight diameter of aggregates was largest at the ridge and lowest at the valley. The infiltrate rates were highest at the valley and lowest at the slope. The valley had the greatest macroporosity (1.09±0.33%), and the highest number (5919±703), volumes (24.7±7.5 cm3) and surface (10.4±2.6 m2) of macropores, as well as the highest conectivity (42.3), while the slope had the smallest macroporosity (0.15±0.14%), and the smallest number (1189±747), volumes (3.4±3.2 cm3) and surface (1.7±1.4 m2) of macropores. The mean pore volume of macropores larger than 1 mm3 was largest at the ridge (16.8±7.4), and smallest at the slope (10.6±2.9). The number of macropores and their macroporosity mainly decreased with increasing depth, but were influenced by the soil macrofauna as well as the erosion and sediment processes. Macropores were mainly vertical, which is affected by the roots of plants and is conducive to the vertical infiltration of water. But, there wer many horizontal macropores at the valley because of the sediment process. The equivalent pore diameter of macropores was mainly smaller than 2 mm (accouting for more than 76.3%), and the macropores larger than 5 mm were less than 1%. Conclusions The macropore characteristics at different sites of the collapsing gullies affected the soil water infiltration and hydraulic conductivity, and further affected the processes of water erosion and mass ersion. The highest macroposities at the valley would result strong subsurface flow erosion and the loss of the base of collapsing wall. Macropores at the ridge would increase rain infiltration and promote soil collapsing. Few macropores and low infiltration abilities at the slope would strengthen the overland flow erosion. Thus, macropore characteristics had significant effects on both the formation and development of collapsing gullies.
Peer Review Status:Awaiting Review
Subjects: Geosciences >> Hydrology submitted time 2021-03-17
Abstract: The interaction between the surface hydrologic cycle and the shrub-encroached landscape at different slope positions remains poorly investigated. This study aims to explore the interaction between the water infiltration patterns affected by shrub encroachment at different hillslope positions. Soil water content and temperature were continuously measured at 10-min intervals at four or five depths under shrub patches and the grass matrix at four slope positions of a Caragana microphylla encroached hillslope from July 2009 to May 2013. The rainfall and meltwater infiltrations were estimated based on above data. Results showed that the rainfall infiltration ratios (IRs) at the grass matrix were as high as 0.78±0.08, except at the lower site, where it was only 0.47. The IRs of shrub patches increased from 0.38 at the top site to 0.77 at the lower site. The IRs were higher at the grass matrix than that at the shrub downslope edges at the top, upper, and middle sites of the hillslope due to the raised microtopography of the shrub mounds. However, at the lower site, IR was higher at the shrub patch than that at the grass matrix than due to more upper slope runoff input and higher infiltration capacity at the shrub patches. The preferential flow was not an important factor influencing the redistribution of water resources on the slope. Snow and ice were blown up by wind and accumulated in the shrub patches and their lees resulted higher water input to the shrub patches than that in the grass matrix during snowy years. Shrub encroachment changed the microtopography, soil property under different canopy and slope positions, and further affected the surface hydrological processes. The feedbacks between shrub encroachment and water infiltration varied at different sites of the hillslope and affected the development of shrub patches. "
Peer Review Status:Awaiting Review