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1. chinaXiv:202107.00032 [pdf]

The Relationships among Structural Social Support, Functional Social Support, and Loneliness in Older Adults: Analysis of Regional Differences based on a Multigroup Structural Equation Model

Haifeng Li; Cong Wang
Subjects: Psychology >> Social Psychology

Objective: This study investigated the relationship between structural social support and loneliness and explored whether functional social support had an intermediate role therein. It also employed a multigroup structural equation model to compare mediation models among older adults living in cities, towns, and rural areas. Methods: Using a self-made demographics questionnaire, the structural-functional social support scale, and the 3-item UCLA loneliness scale, this study collected information from 1,325 older adults identified via convenience sampling. Results: The results showed that: (1) compared with older adults living in towns, older urban and rural adults had higher structural social support and experienced less loneliness, while older adults’ functional social support showed no difference among the three regions (2) An analysis of the models of regional differences indicated that functional social support served as a full mediator in the relationship between structural social support and loneliness in urban older adults, and a partial mediator for older adults living in towns and rural areas. Conclusion: The relationship between structural social support and loneliness is mediated by functional social support, and this mediation model varies between older adults in cities and towns/rural areas. This study helps us understand possible mechanisms through which structural social support impacts loneliness. It suggests that nursing strategies for older adults should be adjusted according to region and direct greater focus on the function (or quality) of the social support network and on older adults living in towns.

submitted time 2021-09-09 Hits3714Downloads361 Comment 0

2. chinaXiv:202104.00128 [pdf]

On the Dynamic Effect of Infinite Redshift Surface: Lorentz Factor Analysis Method

Jiayu NI; Yuan Tu
Subjects: Physics >> Geophysics, Astronomy, and Astrophysics

The generation of infinite redshift surface is due to the singularity of the Lorentz transformation, according to this fact, analyzing the singularity of the parameters in the Lorentz transform factor, which is named the Lorentz factor analysis method in this paper, can be used to research the dynamic effect of the infinite redshift surface. In this paper, the method is applied to the Reissner-Nordstrom and Kerr-Newman black hole spacetime, which finds that the infinite redshift surface will expand and contract with the observer's radial motion, and the corresponding equations are given clearly. A new proof of the inaccessibility of the time-like singularity in a charged black hole is given, and the inaccessibility of the time-like singularity is proved only related to the electrical nature, it has nothing to do with rotation. The study result of space-like quasi-circular motion observer shows that the infinite redshift surface is consistent with that of the static observer at infinity in this case. The minimum blueshift radius which is proposed in the study of the observer who escapes at the speed of light in normal spacetime, it makes a stronger constraint on black hole parameters than traditional condition. This is a possible reason why it is difficult to form an intermediate-mass black hole, discussion about it can be found at the end of the paper.

submitted time 2021-09-07 Hits7923Downloads474 Comment 0

3. chinaXiv:202105.00070 [pdf]

Copula熵:理论和应用

马健
Subjects: Statistics >> Mathematical Statistics
Subjects: Computer Science >> Computer Application Technology
Subjects: Information Science and Systems Science >> Basic Disciplines of Information Science and Systems Science

统计独立性是统计学和机器学习领域的基础性概念,如何表示和度量统计独立性是该领域的基本问题。Copula理论提供了统计相关性表示的理论工具,而Copula熵理论则给出了度量统计独立性的概念工具。本文综述了Copula熵的理论和应用,概述了其基本概念和定理,以及估计方法。介绍了Copula熵研究的最新进展,包括其在统计学四个基本问题(结构学习、关联发现、变量选择和时序因果发现等)上的理论应用。讨论了四个理论应用之间的关系,以及其对应的深层次的相关性和因果性概念之间的联系,并将Copula熵的(条件)独立性度量框架与基于核函数和距离的相关性度量框架进行了对比。简述了Copula熵在水文学、环境气象学、生态学、认知神经学、系统生物学、老年医学、公共卫生学,以及能源工程、制造工程和可靠性工程等领域的实际应用。

submitted time 2021-08-19 Hits7627Downloads932 Comment 0

4. chinaXiv:202107.00026 [pdf]

数理心理学第一公设:事件结构式

高闯; 马安然; 魏薇; 德力达尔
Subjects: Psychology >> Cognitive Psychology
Subjects: Psychology >> Experimental Psychology
Subjects: Psychology >> Other Disciplines of Psychology

“实验实证纲领”与 “理论纲领” 属于科学关键纲领。心理学仍处于“实验实证纲领”主导的实验阶段,追求公理、自洽完备的数理架构是内驱目标,也是 APA 的统一性心理学(Unifying Psychology) 核心诉求。“数理心理学”提出关键数理公设,演绎心理学基础问题,并与经典发现惊奇一致:知觉功能结构、语义编码、学习实验的控制结构、知识的结构体系、信息通道完备性。“事件结构式”由于能够串联起物质信息结构表达、信息认知加工机理的底层逻辑,而成为首要公设。这开辟了利用公理公设演绎心理机制的新途径。基于这一原创性,本文将综述事件结构式的数理成果,并拓展其延伸性推论。

submitted time 2021-08-12 Hits4676Downloads310 Comment 0

5. chinaXiv:202108.00004 [pdf]

语言产生中词频效应老化的神经基础与时间进程

章丽娜; 宣宾
Subjects: Psychology >> Cognitive Psychology

词频效应指语言产生中人们对高频词汇的加工比低频词汇更快更准确的一种现象,它可能发生在语言产生中的不同阶段。对青年人和老年人词频效应上的不同特点和加工机制进行比较,可以考察语言产生中的认知老化机制。通过语言产生理论可对词频效应的老化进行预测,提出词频效应在个体发展和老化阶段的相对稳定性,分析老化导致词频效应相关的神经基础和加工时间进程的改变。未来研究可进一步分离词频效应与习得年龄效应对语言产生老化的影响,并扩展至神经退行性疾病患者中。

submitted time 2021-08-04 Hits1611Downloads114 Comment 0

6. chinaXiv:202107.00011 [pdf]

Properties of several fuzzy set spaces

Huan Huang
Subjects: Mathematics >> Mathematics (General)

This paper discusses the properties the spaces of fuzzy sets in a metric s- pace equipped with the endograph metric and the sendograph metric, re- spectively. We fist discuss the level characterizations of the Γ-convergence and the endograph metric, and point out the elementary relationships among Γ-convergence, endograph metric and the sendograph metric. On the basis of these results, we present the characterizations of total boundedness, rel- ative compactness and compactness in the space of compact positive α-cuts fuzzy sets equipped with the endograph metric, and in the space of com- pact support fuzzy sets equipped with the sendograph metric, respectively. Furthermore, we give completions of these two kinds of spaces, respectively.

submitted time 2021-08-01 Hits3960Downloads245 Comment 0

7. chinaXiv:202006.00039 [pdf]

中文版工作记忆容量测量任务— 自动化运算广度任务”的信效度检验

梅高兴; 肖寻; 陈仕语; 苟丽娜; 李席英
Comment:引用格式: 梅高兴,肖寻,陈仕语,等. 中文版工作记忆容量测量任务—“自动化运算广度任务”的信效度检验[J] . 贵州师范 大学学报( 自然科学版) ,2021,39( 4) : 98-103.[MEI G X,XIAO X,CHEN S Y,et al. Reliability and validity of a Chinese version of the automated version of the operation span task[J] . Journal of Guizhou Normal University ( Natural Sciences) ,2021,39( 4) : 98- 103.]
Subjects: Psychology >> Experimental Psychology

采用基于 MATLAB 软件环境开发的简体中文版的“自动化运算广度任务”和瑞文推理测验对 102 名大学生进行施测,其中 86 名被试平均约 8 d 后进行重测。结果显示: 简体中文版“自动化运算广度任务”的 Cronbach sα 内部一致性信度系数为 0. 670,重测信度为 0.666; 采用瑞文推理测验作为效度效标,将瑞文推理测验得分与总广度得分的皮尔逊相关分析显示,二者在初测( r = 0. 33,P < 0. 01) 和重测( r = 0. 39,P < 0. 001) 均呈显著正相关。结论: 简体中文版的“自动化运算广度任务”具有较好的信效度, 操作简便, 可方便测量个体的工作记忆容量。该任务程序可以在 https: / /www.labxing.com /lab /695 /data 网站免费下载使用。

submitted time 2021-07-28 Hits21037Downloads2738 Comment 0

8. chinaXiv:202107.00034 [pdf]

数字空间联结的动态性及其内在机制

颜丽珠; 陈妍秀; 刘勋; 傅世敏; 南威治
Subjects: Psychology >> Cognitive Psychology

数字空间联结一直是认知心理学领域研究的热点之一。探索数字空间联结的一个重要指标为空间-数字反应联合编码(spatial-numerical association of response codes,SNARC)效应(左/右手对小/大数反应更快更准确)。以往研究已验证SNARC效应的普遍性及其在方向上的灵活性,并提出多种理论解释。此外,SNARC效应在加工阶段上也具有灵活性,其原因可能有:(1)加因素法则的理解偏差、(2)观察的角度单一、(3)观察效标的差异、(4)使用任务的差异。结合以上因素,提出双阶段(数量信息的空间表征、空间表征到反应选择)加工模型,不同的操控因素分别作用于两个阶段可能是引起SNARC效应灵活变化的核心原因。未来研究可从对比任务差异、引入不同干扰因素等方面进一步验证双阶段加工模型,并结合认知神经科学技术揭示数字空间联结灵活性的内在神经机制。

submitted time 2021-07-27 Hits1780Downloads238 Comment 0

9. chinaXiv:202107.00008 [pdf]

GT198蛋白是抗癌化药和抗癌草药的靶点

庞峻峰; 高洁; 张立勇; Nahid F. Mivechi ; 柯蓝
Subjects: Medicine, Pharmacy >> Pharmacology

肿瘤血管生成是癌症的一个特征。一些抗血管生成的抗癌药物已被证明临床有疗效。我们之前的研究显示,在包括口腔癌在内的人类实体瘤中,GT198 蛋白(基因符号PSMC3IP,又称为Hop2)是一个诱导血管生成的癌蛋白。本研究结果表明,十几种临床抗癌化疗药物,和几种临床成功的抗癌草药,都能直接抑制GT198蛋白靶点。GT198是一个能与DNA结合的DNA修复蛋白。利用体外DNA结合法检测GT198活性,我们测试了129个美国NCI收集的临床抗癌化疗药物。发现体外直接抑制GT198的化药包括但不限于米托蒽醌、多柔比星(阿霉素)、紫杉醇、依托泊苷、放线菌素D和伊马替尼(格列卫)。紫杉醇和依托泊苷具有较高的结合亲和力,而多柔比星由于竞争性抑制GT198,具有较高的结合效力。由于GT198与DNA拓扑异构酶有蛋白序列同源性,而DNA拓扑异构酶是过去认为的药物靶点,因此,GT198蛋白很可能是个以前未被认知的药物新靶点。为了寻求更高效的GT198抑制剂,我们进一步测试了几种抗癌草药的提取物。发现具有高亲和力和高效力的阳性抑制草药都是临床上已经有成功历史的抗癌草药,包括牙买加的多香果(Allspice)、中国的皂角刺(Gleditsia sinensis L.),和厄瓜多尔的BIRM。我们使用有机化学方法对多香果进行了部分纯化,证明用GT198为靶标,以体外DNA结合法追踪测活,可以高效快速纯化天然产物。综上表明,此项研究揭示了GT198是多种抗癌化药的新靶点。这项研究还提供了一个鉴定化合物与纯化天然产物的优异药物靶标。特别关键的是,这项研究为快速分离高效低毒的抗癌中草药提供了绝佳机会。

submitted time 2021-07-12 Hits6546Downloads316 Comment 0

10. chinaXiv:202101.00003 [pdf]

On dark matter

Xian-Qiao Yu
Subjects: Physics >> The Physics of Elementary Particles and Fields

In this article, I shall propose a new theory of dark matter, in which I introduce a neutral primordial field, which is a new field beyond the standard model. All the standard model elementary particles are produced spontaneously from this field in the Big Bang epoch of the universe and then these produced elementary particles decayed or annihilated in the well-known standard model interactions. The relic of the primordial field appears in a form of vacuum energy can not only give naturally the correct abundance of dark matter in the present universe, but provide a natural solution to the cosmological constant problem as well. We find that the conventional methods of detecting dark matter either fail or have great difficulties to detect the remaining vacuum energy of the primordial field, and how to confirm the existence of the remaining energy of the universe's original energy in experiment is still an open problem.

submitted time 2021-06-29 Hits10969Downloads905 Comment 0

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