Subjects: Digital Publishing >> New Media submitted time 2023-10-08 Cooperative journals: 《中国传媒科技》
Abstract：广播电视监管工作中的相关数据已经累积到相当多的程度,传统的存储和数据处理技术体系的建设维护越来越不能适应数据量增长速度和业务上的需求,在保证原有系统平稳运行的前提下,非常需要利用新的技术体系对数据进行迁移、扩容和备份,以Hadoop为代表的开源大数据处理和存储软件框架给我们提供了一套可行的方案。本文依据数据资产管理系统的实际建设经验,对其中的关键技术和建设过程进行分析和介绍。
Subjects: Psychology >> Developmental Psychology submitted time 2023-03-28 Cooperative journals: 《心理科学进展》
Abstract： Fairness norm enforcement refers to the willingness to incur personal costs to punish violations of fairness norms, which was thought to be a hallmark of human society and play a key role in cooperative interactions. Group identity refers to some knowledge of one’s group membership together with the value and emotional significance attached to that membership, which directly influences people’s fairness norm enforcement during inter-group context. Using a variety of asset allocation game, researchers found group bias exerted a critical effect on fairness norm enforcement, while existing in two opposite patterns. Sometimes, people were more likely to accept unfair offer from in-groups, reflecting the pattern of in-group favoritism, but sometimes people were also more likely to punish norm violations from in-group members, revealing the form of the so-called black sheep effect. Currently, norms focused theory and mere preferences theory have usually been used to explain the above contradictory phenomena. Based on this review, future research directions should explore the boundary conditions of this bias, compare the difference of this parochial altruism induced by variable group identity, emphasize the integration of different theories, and enhance the exploration of its underlying neural mechanisms.
Subjects: Materials Science >> Materials Science (General) submitted time 2023-03-18 Cooperative journals: 《材料研究学报》
Abstract： As phase change heat storage material (PCM), composites of paraffin/expanded graphite of different particle sizes (DPS-EG) were prepared by melt blending method, which were then characterized by means of XRD, FT- IR, SEM, DSC and LFA. The effect of mass fraction of DPS-EG on performance of the composite PCM was studied. Results show that the thermal diffusivity of the composite PCM increased first and then decreased with the increasing mass fraction of small particle sized EG. When the ratio of mass fraction for large sized ones to the small ones of the DPS-EG was 9:1, paraffin may be allowed to fill fully into the free space of the mosaic structure of DPS-EG. The thermal diffusivity of the composite PCM was up to 1.964�10-6 m2/s, 22 times higher than that of pure paraffin, while its latent heat was 144.2 J/g.
Subjects: Medicine, Pharmacy >> Clinical Medicine submitted time 2022-12-20 Cooperative journals: 《中国全科医学》
Abstract：
Background Small recent subcortical infarction (RSSI) is one of the manifestations of lacunar infarction, a common brain disease that can lead many patients to the clinical outcome of disability or dementia. However, the relationship between infarct burden, cognitive function and blood glucose fluctuation in patients with type 2 diabetes mellitus (T2DM) complicated with RSSI is not very clear. Objective To explore the relationship between blood glucose variability (GV), infarction burden and cognitive function in patients with T2DM complicated with RSSI, and to build a risk prediction model. Methods The basic clinical data of 140 patients with T2DM complicated with RSSI were recorded and 72-hour continuous blood glucose detection was performed. The infarct load was evaluated by magnetic resonance imaging performance; the cognitive function was evaluated by the Montreal Cognitive Assessment Scale. Multivariate logistic regression analysis was used to study the influencing factors of infarction burden and cognitive impairment in patients with T2DM complicated with RSSI, and the receiver operating characteristic curve was drawn according to the results to evaluate the effect of GV on T2DM complicated with RSSI. The predictive value of cognitive impairment in patients with infarction, and the nomogram predictive model was constructed and the predictive value was analyzed. Results There were significant differences in SD, %CV and TIR between low and high load groups (P<0.05). There were significant differences in SD, %CV, and TIR between the groups with and without cognitive impairment (P<0.05). Logistic regression analysis showed that SD [OR=4.201, 95%CI (1.38, 12.788), P=0.011], %CV [OR=1.218, 95%CI (1.096, 1.354), P<0.001] increased were risk factors for increased infarction burden; elevated TIR [OR= 0.866, 95%CI (0.814, 0.921), P<0.001] was a protective factor. SD〔OR=2.947, 95%CI (1.150, 7.548), P=0.024〕, %CV〔OR=1.174, 95%CI (1.072, 1.287), P=0.001〕increased were risk factors for cognitive impairment in T2DM patients with small infarcts; elevated TIR [OR= 0.954, 95%CI (0.917, 0.992), P=0.018] was a protective factor. Based on SD, %CV, and TIR, a nomogram prediction model for the risk of cognitive impairment in patients with T2DM complicated with RSSI was established. Using DCA for internal validation of clinical benefits, the results suggest that the prediction model has greater clinical benefits. And carry out internal correction, suggesting that the actual prediction result is close to the ideal prediction result. The receiver operating curve of SD, %CV, and TIR for predicting cognitive impairment in patients with T2DM combined with RSSI was drawn. The areas under the curve (AUC) of cognitive impairment in patients with RSSI were %CV: AUC was 0.758 [95% CI (0.66, 0.856), P<0.01], TIR: AUC was 0.714 [95% CI (0.624, 0.804), P<0.01]. Conclusion Blood glucose variability is closely related to infarction burden in patients with T2DM complicated with RSSI, and is closely related to cognitive dysfunction in patients with T2DM complicated with RSSI. The occurrence of cognitive impairment in patients with RSSI has a good predictive effect, and it has a certain clinical value in preventing the occurrence of recent small subcortical infarction and cognitive impairment by improving the degree of blood sugar fluctuation.
Subjects: Astronomy >> Astrophysical processes submitted time 2020-05-12 Cooperative journals: 《天文研究与技术》
Abstract：噪声注入定标方法作为厘米波段一种常规强度校准方式而被广泛使用。通过组建K波段常温接收机及其定标平台，在室内20℃下使用传统冷热负载法标定接收机噪声温度及噪声源温度，之后在室外-7℃中使用同样方法再次标定上述参数，并利用室内标定的噪声源去进一步标定室外环境中接收机的噪声温度。测试结果表明，在环境温度变化约27度时，接收机噪声温度定标差异约为50.5%，标准噪声源定标差异约为41%。故此得知，如若将噪声注入法应用于常温接收机定标中，首先需考虑对接收机进行恒温处理，另外可采取对注入的标准噪声源进行温度补偿，使其可以更加精确的应用于二次定标当中，这也是本论文下一步计划开展的工作。
Subjects: Geosciences >> Geography submitted time 2019-11-15 Cooperative journals: 《干旱区地理》
Abstract：针对隆德站地基微波辐射计温度资料，根据数据本身规律及各类疑误数据表现形式，结合历史探空资料，利用垂直变化强度极值检查、标准差检查、极值检查、奇异值检查和僵值检查5种检查方法进行质量控制实验，与同期探空资料比对，分析其应用效果。结果表明：各质量检查结果对数据质量均有一定的区分能力，且对控制参数是敏感的；数据质量以晴空最优、云天次之、降水稍差，各高度层数据质量基本相当。质量控制结果相关性分析表明各高度层上晴空相关性最好，云天次之，降水稍差，相关性都处在较高的水平上；降水情况下质量控制效果最显著。
Subjects: Psychology >> Social Psychology submitted time 2019-09-14
Abstract： Fairness norm enforcement refers to the willingness to incur personal costs to punish violations of fairness norms, which was thought to be a hallmark of human society and play a key role in cooperative interactions. Group identity refers to some knowledge of one’s group membership together with the value and emotional significance attached to that membership, which directly influences people’s fairness norm enforcement during inter-group context. Using a variety of asset allocation game, researchers found group bias exerted a critical effect on fairness norm enforcement, while existing in two opposite patterns. Sometimes, people were more likely to accept unfair offer from in-groups, reflecting the pattern of in-group favoritism, but sometimes people were also more likely to punish norm violations from in-group members, revealing the form of the so-called black sheep effect. Currently, norms focused theory and mere preferences theory have usually been used to explain the above contradictory phenomena. Based on this review, future research directions should explore the boundary conditions of this bias, compare the difference of this parochial altruism induced by variable group identity, emphasize the integration of different theories, and enhance the exploration of its underlying neural mechanisms. "
Subjects: Computer Science >> Integration Theory of Computer Science submitted time 2019-04-01 Cooperative journals: 《计算机应用研究》
Abstract： GIFT is a lightweight block cipher with high efficiency and low power consumption. There are few research results to evaluate its security. This paper presented the balanced Biclique and Star attacks on GIFT-64 based on the Biclique attack method, combined with the information leakage of the key scheduling and the round function structure of GIFT-64. The data complexity and computational complexity required for the balanced Biclique attack of GIFT-64 are 232 and 2127.36 respectively. The data complexity and computational complexity required for the Star attack of GIFT-64 are 2 and 2127.48 respectively. These are the first security analysis for the full-round GIFT-64.
Subjects: Biology >> Zoology submitted time 2018-12-24 Cooperative journals: 《动物营养学报》
Abstract：为探讨鸡血藤醇提物对黄颡鱼抗氧化能力、非特异性免疫力和抗病力的影响，选取健康1龄全雄黄颡鱼720尾，初始体重为(35.25±1.63) g，初始体长为(14.07±0.24) cm，随机分为6组（每组3个重复，每个重复40尾），分别投喂添加0、0.04%、0.08%、0.16%、0.32%和0.64%鸡血藤醇提物的等氮等能饲料，依次标记为T1～T6组，并以T1组为对照组。饲养60 d后测定黄颡鱼各组织（鳃、脑、头肾、中肾、肝胰脏、脾脏）及血清中超氧化物歧化酶（SOD）、过氧化氢酶（CAT）、谷胱甘肽过氧化物酶（GSH-Px）活性与丙二醛（MDA）、谷胱甘肽（GSH）、一氧化氮（NO）含量，以及肝胰脏及血清中谷丙转氨酶（GPT）、谷草转氨酶（GOT）活性与血清中补体3（C3）、免疫球蛋白（IgM）、白蛋白（ALB）含量。饲养试验结束后，通过注射嗜水气单胞菌进行攻毒，计算攻毒7 d后的累积死亡率和免疫保护率。结果显示：添加0.16%～0.32%鸡血藤醇提物能显著提高黄颡鱼各组织及血清中SOD、CAT、GSH-Px活性与GSH含量以及血清中C3和ALB含量（P0.05）；肝胰脏、血清、头肾中NO含量随着鸡血藤醇提物添加量的增加呈先上升后下降的趋势，鳃、脑中NO含量则呈先下降后上升的趋势，脾和中肾中NO含量不随鸡血藤醇提物添加量的变化而显著变化（P>0.05）；攻毒试验中，饲料中添加0.16%～0.32%鸡血藤醇提物能显著降低攻毒7 d后的累积死亡率（P<0.05），并有效提高免疫保护率。由此得出，综合抗氧化能力、非特异性免疫力和抗病力，黄颡鱼饲料中鸡血藤醇提物的适宜添加量为0.16%～0.32%。
Subjects: Medicine, Pharmacy >> Preclinical Medicine submitted time 2017-12-07 Cooperative journals: 《南方医科大学学报》
Abstract： Objective To investigate the effect of nuclear factor I-C (NFI-C) on platelet-derived growth factor (PDGF)-induced up-regulation of TGF-β receptor II (TβRII) in dermal fibroblasts. Methods A lentiviral vector containing NFI-C sequence (Lenti-GFP-NFI-C) was transfected into a human foreskin fibroblast cell line (HFF-1). Cultured HFF-1 cells, cells transfected with Lenti-GFP-NFI-C, and cells transfected with a negative virus were stimulated with PDGF-BB, and Western blotting and RT-qPCR were used to detect the expression levels of TβRII in the treated cells. Results PDGF treatment significantly increased the expression level of TβRII in HFF-1 cells (P<0.05). The cells transfected with Lenti-GFP-NFI-C expressed a significantly lower level of TβRII than non-transfected cells in response to PDGF stimulation (P<0.05), but the negative virus showed no such inhibitory effect (P>0.05). No significant difference was found in the expression level of TβRII protein between cells transfected with Lenti-GFP-NFI-C-transfection before PDGF stimulation and the blank control cells. Conclusion NFI-C can inhibit PDGF-induced up-regulation of TβRII and thus reduce the sensitivity of the dermal fibroblasts to TGF-β.
Subjects: Astronomy >> Astrophysical processes submitted time 2017-10-11 Cooperative journals: 《天文研究与技术》
Abstract：冕环结构的准确识别和跟踪有利于更好地研究和分析冕环特征以及同耀斑爆发和日冕物质抛射之间的关系。提出基于相位一致性和方向滤波的冕环震荡识别和跟踪方法。识别过程如下:首先，使用相位一致性技术对太阳图像中的冕环特征进行识别;其次，对识别后的图像进行二值化处理;接着使用方向滤波去除非冕环的结构特征;然后，对其进行形态学处理;最后，再对识别结果进行二次曲线拟合。运用所提算法对2011年9月6日由太阳动力学观测站(Solar Dynamics Observatory, SDO)在Fe IX 17.1 nm波段观测到的冕环震荡进行了识别和跟踪，结果验证了所提算法的可行性和准确性。证明所提算法能被用于冕环特性以及震荡过程的研究和分析。
Subjects: Computer Science >> Integration Theory of Computer Science submitted time 2016-11-02
Abstract：可扩展计算机系统在各个领域得到了越来越广泛的应用，这些应用往往具有可扩展的需求，而这些可扩展应用的特征却有很大差异。过去20 年间，用于可扩展应用的系统平台层出不穷，这些平台的优势也各不相同，评价一类应用与某种系统平台相适应的程度成为用户关注的一个关键问题。本文对可扩展应用及可扩展系统进行了综述与分析，并提出了一些评价应用与系统平台匹配程度的参考因素；同时，本文还对近来业界提出的一些热点新名词进行了解释与分析，比较了它们之间的异同。本文的目的是帮助人们深入理解可扩展应用与可扩展系统的特征，帮助用户选择合适的平台以提高应用的效率和资源的利用率，同时激发科研人员进一步探索适应应用新需求的系统平台技术。
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