Subjects: Other Disciplines >> Synthetic discipline submitted time 2023-03-28 Cooperative journals: 《中国科学院院刊》
Abstract： Numerous great discoveries have been made in the field of deep space exploration over the past 50 years, and they deepen our knowledge and synergetic comprehension greatly about the Earth, Planets, and the Solar system. The deep space exploration not only acts as impetus to drive the development of modern science and technology, but also fosters the planetary physics as a new interdiscipline. This study analyzes the background and current status for the discipline of planetary physics, and compares the progress made on the planetary physics of China with that of the other well-developed countries. The relationship of the Chinese planetary physics with the other traditional disciplines, like geophysics, space physics etc., as well as with the projects of deep space missions is elaborated. Based on the current status and developing trend of planetary study, this paper presents possible directions as well as instructive suggestions for the development of Chinese planetary physics in the near future.
Subjects: Biology >> Zoology submitted time 2018-12-20 Cooperative journals: 《动物营养学报》
Abstract：本试验旨在研究黑水虻幼虫粉替代鱼粉对鲈鱼幼鱼生长性能、体组成、血浆生化指标和组织结构的影响。选用初始均重为5.2 g的鲈鱼幼鱼540尾，随机分为6组，每组3个重复，每个重复30尾。6组试验鱼分别投喂以黑水虻幼虫粉替代基础饲料（含28.00%的鱼粉，鱼粉中粗蛋白质含量为67.50%）中0（G0，作为对照）、10%（G10）、20%（G20）、30%（G30）、40%（G40）、50%（G50）鱼粉的6种等氮（粗蛋白质含量为39.9%）等能（总能为17.9 MJ/kg）的试验饲料，试验期为56 d。结果表明：黑水虻幼虫粉替代不同比例的鱼粉对鲈鱼幼鱼的终末体重、增重率、特定生长率、摄食量、蛋白质效率、饲料系数以及存活率均未产生显著影响（P>0.05）。各组鲈鱼幼鱼肥满度无显著差异（P>0.05），但G50组的脏体比和肝体比显著高于G0组（P0.05），但G20～G50组全鱼粗脂肪含量显著高于G0组（P0.05）。随着替代比例的增加，肝脏组织出现胞浆疏松、溶解或空泡状，部分或较多胞核消失；各替代组的肠道绒毛长度均低于G0组，且G0组与G10和G40组的差异达到显著水平（P<0.05）；除G20组外，其他替代组的肌层厚度与G0组相比均出现显著降低（P<0.05）。综上所述，黑水虻幼虫粉替代基础饲料中50%的鱼粉（黑水虻幼虫粉在基础饲料中的添加量为27.8%，占饲料蛋白质的23.7%）对鲈鱼幼鱼的生长性能无显著影响，但高替代比例会使鱼体脂肪沉积增加，肝脏组织出现病变，肠道结构发育受损。
Subjects: Psychology >> Psychological Measurement submitted time 2018-04-18 Cooperative journals: 《心理学报》
Abstract： In rural areas of China, more than 50 million elderly people are left-behind, and they have a strong sense of loneliness. The relationship between husband and wife plays an important role in alleviating the loneliness feeling of the elderly, therefore, it is crucial to understand the association between marital attachment and loneliness of left-behind elderly. Previous study showed that Chinese elderly’s marital attachment was composed in three dimensions: security, avoidance and anxiety. However, the three-dimensional structure of Chinese elderly’s marital attachment has not been tested in the rural elderly population. In addition, the association between Chinese elderly’s loneliness and their three-dimensional marital attachment is also not clear. Therefore, further studies are needed. The current study, firstly, tested the three-dimensional structure of the Chinese elderly’s marital attachment, and secondly, investigated the relationship between marital attachment and loneliness of left-behind elderly. The Older Adults’ Marital Attachment Scale, Scale of Perceived Social Support, Core Self-Evaluations Scale, and ULS-8 Loneliness Scale were administered to 510 left-behind elderly from rural areas in China. All cases were randomly assigned to two subsets: one set was for exploratory factor analysis, and the other was for confirmatory factor analysis. The SPSS 20.0 and AMOS 20.0 were used for this analysis, and the structural equation model and the bootstrapping analysis were employed to examine the hypothesized mediating model. The key findings were as follows: (1) the 14-item revised OAMAS showed a three-dimensional construct of attachment, namely security, avoidance, and anxiety; (2) the marital attachment of left-behind elderly could be clustered into three types, including secure marital attachment (37.84%), refusal marital attachment (31.18%), and anxious marital attachment (30.98%). The proportion of secure marital attachment in left-behind elderly was significantly lower than that in community elderly (Z = −5.63, p < 0.001), and the proportion of refusal marital attachment in left-behind elderly was significantly higher than that in community elderly (Z = 7.01, p < 0.001) ; (3) perceived social support fully mediated the association among security attachment, avoidance attachment and loneliness. Perceived social support and core self-evaluations had multiple mediation effects on the association among security attachment, avoidance attachment and loneliness. While the association between anxiety attachment and loneliness was partially mediated by core self-evaluations. The results indicated that three-dimensional structure of Older Adults’ Marital Attachment Scale was an effective measurement of marital attachment in left-behind elderly group. There was a close relationship between the marital attachment and loneliness of the left-behind elderly, safe marital attachment could effectively relieve the loneliness of left-behind elderly. The results may help to expand the study range of elderly’s marital attachment, and provide a reference for reducing the loneliness of the left-behind elderly. implications and limitations are discussed.
Subjects: Geosciences >> Space Physics submitted time 2016-05-13
Abstract： After lots of experiments by using 19~27MeV differential energetic proton data based on the observation of SAMPEX from July of 1992 to June of 2004, it is found that the change of F_(10.7) and altitude have a great influence on the distribution of differential energetic proton flux in South Atlantic Anomaly. During the geomagnetic quiet time at 54025km altitude, the energetic proton flux in South Atlantic Anomaly decreased with the increasing of F_(10.7), and the variation trend was flat when F10.7 ≥ 115 sfu. It is found that there was obviously an anti-correlation between the absolute value of SYM-H and the differential energetic proton flux in South Atlantic Anomaly for storms with SYM-H ? -50, and also there was a lasting effect on differential energetic proton flux in South Atlantic Anomaly. In addition, the proton flux could be significantly reduced in South Atlantic Anomaly during the main phase, while the proton flux showed a substantial resuming trend in the recovery phase of geomagnetic storms.
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