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排序方式: 共有114条查询结果,搜索用时 15 毫秒
81.
通过检测血浆纤维蛋白原(FIB)水平及血清肿瘤相关物质(TAM)水平,探讨血浆FIB在胃癌患者中的水平及临床意义.结果显示:胃癌患者较胃良性肿瘤、健康体检者的FIB、TAM水平高(P<0.05),后二者比较差异无统计学意义(P>0.05);FIB和TAM在胃癌中的水平与临床分期、淋巴结转移、远处转移有关,其差异均有统计学意义(P<0.05),而与年龄、性别、分化程度无关(P>0.05);FIB与TAM水平具有相关性(r=0.65,P<0.05).因此,血浆FIB水平有望成为胃癌患者有临床价值的标志物. 相似文献
82.
I. Toqeer M. Y. Naz M. Azam M. A. S. Alkanhal R. M. M. Meer 《Philosophical Magazine Letters》2019,99(2):67-76
Ferrite nanoparticles are interesting materials owing to their unique physical and chemical properties. The metal-doped ferrites have well-defined structures and magnetic response, such as high permeability for a specific frequency range. In this study, copper-substituted nickel ferrite (Ni1?xCuxFe2O4) nanoparticles with a compositional range of 0?≤?x?≤?0.3 were synthesised through a co-precipitation technique. Metal chlorides were used as precursors and NaOH as a precipitating agent for the growth of ferrite nanoparticles. To minimise the internal stresses and maximise the magnetic response, ferrite nanoparticles were annealed in a furnace at 700°C for 6 h. The structural and magnetic response of Ni1?xCuxFe2O4 ferrite with different values of x were investigated using Scanning Electron Microscopy (SEM), Fourier Transform Infrared spectroscopy (FT-IR), Vibrating Sample Magnetometer (VSM) and X-ray Diffraction (XRD) techniques. XRD analysis confirmed the formation of cubic spinel structure of single phase for all the compositions. The lattice constant decreased with increase in the value of x. FT-IR study showed two main metal oxygen bonds in the range 500–700 cm?1 confirming the formation of a single-phase cubic inverse structure of Cu-substituted Ni ferrite. VSM results revealed the formation of ferrimagnetic nanoparticles. The optical and magnetic response of the ferrite nanoparticles changed with Cu content. 相似文献
83.
心理学实验首先必须保证结果的有效性和可靠性。实验素材容量是影响实验结果的关键因素之一。本文的目的是通过运用多元概化理论分析几个典型认知行为实验的素材容量对实验结果精度的影响, 从而探讨最佳的实验素材容量的确定问题。研究结果发现, 在IAT测验上, 相容与不相容任务的素材容量为50时最佳, 可靠性指数为0.92; 在图-词干扰范式中, 素材容量以48时为最佳, 可靠性指数为0.95; 对线索提示范式, 50%有效提示中, 有效与无效提示最佳素材容量为35, 可靠性指数是0.97。研究表明, 多元概化理论可以很好地用于确定认知行为实验中素材的最佳容量。 相似文献
84.
语音在汉字语义通达中的作用是二十多年来心理语言学研究的热点之一。直通假设和形音交互假设是学者们主张的理论观点,它们在语音和语义的相互关系上存在分歧,并分别有各自的实验证据。从比较语音语义激活时间进程、同音字效应、神经心理学与脑成像、语音作用的发展转换这四个方面对过去的研究进行回顾,指出了实验范式和实验材料中存在的问题,并提出结合汉字特点进行研究的思路。 相似文献
85.
Filip Mattens 《Australasian journal of philosophy》2017,95(4):688-701
Because philosophical reflections on touch usually start from our ability to perceive properties of objects, they tend to overlook features of touch that are crucial to correct understanding of tactual perception. This paper brings out these features and uses them to develop a general reconception of the sense of touch. I start by taking a fresh look at our ability to feel, in order to reveal its vital role. This sheds a different light on the skin's perceptual potential. While it is commonly observed that tactile experiences have two intentional objects, an external object and one's own body, I will advance a more accurate alternative: in tactile experiences, one becomes aware of what one's body undergoes. This alternative not only fits better with tactility's vital role; it is also key to explaining how active touching provides for a unique contribution to our perceptual relation to material objects. By thus connecting tactility's vital role to the way we rely on touch while manipulating objects, this essay offers a cross-sectional survey of our tactile powers that reveals the interplay between sensing and touching. 相似文献
86.
The Heart and the Head: On Choosing Experiences Intuitively and Possessions Deliberatively
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An enduring question in the field of judgment and decision making is when people are likely to choose on the basis of intuition and when they are likely to pursue a more deliberative decision strategy. Here, we attempt to shed light on that question by examining whether people tend to weight intuition more heavily when making experiential purchases, and to weight deliberation more heavily when making material purchases. Results from seven studies indicate that they do. In Study 1 (and a replication), participants expressed an explicit preference for choosing experiential purchases intuitively and material purchases analytically. In Study 2 (and a replication), participants anticipated experiencing more regret after going against reason for material purchases and going against intuition for experiential purchases. Participants in Study 3 who were asked to think about an experiential purchase wanted to see the relevant information presented by alternative, which facilitates intuitive/holistic processing, more than did those who were asked to consider a material purchase. In two additional studies, participants who were induced to think intuitively chose experiential purchases more often (Study 4) and reported a higher willingness to pay for them (Study 5) compared with participants induced to think analytically. Copyright © 2016 John Wiley & Sons, Ltd. 相似文献
87.
In this study, we examined the unique contribution of pornography consumption to the longitudinal prediction of criminal recidivism in a sample of 341 child molesters. We specifically tested the hypothesis, based on predictions informed by the confluence model of sexual aggression that pornography will be a risk factor for recidivism only for those individuals classified as relatively high risk for re-offending. Pornography use (frequency and type) was assessed through self-report and recidivism was measured using data from a national database from the Royal Canadian Mounted Police. Indices of recidivism, which were assessed up to 15 years after release, included an overall criminal recidivism index, as well as subcategories focusing on violent (including sexual) recidivism and sexual recidivism alone. Results for both frequency and type of pornography use were generally consistent with our predictions. Most importantly, after controlling for general and specific risk factors for sexual aggression, pornography added significantly to the prediction of recidivism. Statistical interactions indicated that frequency of pornography use was primarily a risk factor for higher-risk offenders, when compared with lower-risk offenders, and that content of pornography (i.e., pornography containing deviant content) was a risk factor for all groups. The importance of conceptualizing particular risk factors (e.g., pornography), within the context of other individual characteristics is discussed. 相似文献
88.
89.
Elana Jefferson-Tatum Ph.D. 《Dialog》2020,59(4):277-285
Revisiting Charles H. Long's 1991 proclamation of a modern crisis of materiality, this essay examines Long's theorization of the fetish-commodity legacies, that recreated African persons into objects and commodities, as a means of understanding our present tripartite pandemic of systemic racism, environmental destruction, and COVID-19. Examining the period of, what Long elsewhere terms, the “second creation,” I interrogate what this crisis means for the study of religion and for our society today. Building on Long's conception of “soul stuff” and yet moving beyond notions of human exceptionalism, I argue that to move beyond fetish and colonial legacies and realize a “third creation” (or, in other words, a (re-)re-creation), both scholars and the public must craft a new materialism that honors the ontological reality and value of all existence. 相似文献
90.
阅读知觉广度通常指阅读者在阅读文本过程中每次注视能获取有用视觉信息的范围。既往的汉语知觉广度的研究一般把单字作为基本的知觉呈现单元,但在某些呈现条件下,此类呈现方式会导致阅读过程中的语义加工的完整性被破坏。本研究采用眼动追踪技术,使用移动窗口范式和中央凹掩蔽范式,使用双字词句作为阅读材料,双字词作为基本的知觉呈现单元,探讨在保证知觉呈现单元语义完整性的基础上大学生的汉语阅读知觉广度。实验一采用移动窗口范式,结果发现,知觉广度范围为注视词左侧1个双字词及右侧1-2个双字词的空间。实验二采用中央凹掩蔽范式,结果验证了实验一的研究结果。该结果表明,在汉语阅读过程中,以双字词为基本的视觉呈现单元,较既往研究中单字为基本呈现单元的情况,更好地保证了阅读中语义的完整性,从而获得了更大的知觉范围。该结果建立于视觉呈现单元的语义完整性的基础上,是对现有的汉语阅读知觉广度理论的完善和扩展。 相似文献