排序方式: 共有28条查询结果,搜索用时 968 毫秒
1.
Safa Ali Ahmed Amar Recep Eryilmaz Halit Demir Serdar Aykan Canan Demir 《The aging male》2019,22(3):198-206
In this study, the antioxidant enzyme activities such as (SOD, GSH, and CAT) and malondialdehyde (MDA) level which is the end product of lipid peroxidation, were determined from the serum samples taken from patients diagnosed with prostate cancer Van Yuzuncu Y?l University Medical Faculty of Educational Research and Training Hospital and ?stanbul Bagcilar Education Research Hospital. The SOD, GSH, and CAT activity of patient groups was found significantly lower than the healthy control group in patients with prostate cancer (p?.05). Serum MDA level is found significantly high when compared to control groups. MDA levels increased in patients that suffer prostate cancer disorder. Whereas, firstly antioxidant enzymes activity of SOD, GSH and CAT have been decreased in control groups. Thus, we concluded that the cause of development of prostate cancer may be the result of an imbalance between the antioxidants and oxidative stress. As a result, SOD, CAT, GSH, and MDA may play an important role in the etiopathogenesis of prostate cancer. 相似文献
2.
Deniz Inan Erol Egrioglu Busenur Sarica Oykum Esra Askin Mujgan Tez 《统计学通讯:理论与方法》2017,46(22):11358-11369
In this study, a new method for the estimation of the shrinkage and biasing parameters of Liu-type estimator is proposed. Because k is kept constant and d is optimized in Liu’s method, a (k, d) pair is not guaranteed to be the optimal point in terms of the mean square error of the parameters. The optimum (k, d) pair that minimizes the mean square error, which is a function of the parameters k and d, should be estimated through a simultaneous optimization process rather than through a two-stage process. In this study, by utilizing a different objective function, the parameters k and d are optimized simultaneously with the particle swarm optimization technique. 相似文献
3.
Past empirical research relying on self-determination theory (SDT) has consistently shown that parental support of basic psychological needs (BPN) is associated with adolescent happiness. Yet, the specific mechanisms accounting for this link are still undetermined. The present study aimed to address this gap in the literature by testing a theoretical model proposing that adolescents’ satisfaction of BPN in life and sense of uniqueness mediate the association of parental support for BPN and happiness. The analyses relied on structural equation modeling and bootstrapping procedures and found support for the model. The theoretical implications of the model for SDT and applied considerations to improve the well-being of adolescents are discussed. Also, suggestions for future research that could further improve our understanding of the dynamic interplay between BPN, sense of uniqueness and happiness are presented. 相似文献
4.
Let {Z
i
}
i≥1 be an arbitrary sequence of trials with two possible outcomes either success (1) or failure (0). General expressions for
the exact distributions of runs, both success and failure, in Z
1, . . . , Z
n
are presented. Our method is based on the use of joint distribution of success and failure run lengths and unifies the results
on distribution of runs. As a special case of our results we obtain the distributions of runs for various binary sequences.
As illustrated in the paper the results enable us to derive the distribution of runs for binary trials arising in urn models. 相似文献
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In this study, a new per-field classification method is proposed for supervised classification of remotely sensed multispectral image data of an agricultural area using Gaussian mixture discriminant analysis (MDA). For the proposed per-field classification method, multivariate Gaussian mixture models constructed for control and test fields can have fixed or different number of components and each component can have different or common covariance matrix structure. The discrimination function and the decision rule of this method are established according to the average Bhattacharyya distance and the minimum values of the average Bhattacharyya distances, respectively. The proposed per-field classification method is analyzed for different structures of a covariance matrix with fixed and different number of components. Also, we classify the remotely sensed multispectral image data using the per-pixel classification method based on Gaussian MDA. 相似文献
8.
Ufuk Yolcu Erol Egrioglu Vedide R. Uslu 《Journal of Statistical Computation and Simulation》2013,83(4):599-612
Artificial intelligence procedures such as artificial neural networks (ANNs), genetic algorithms and particle swarm optimization and other procedures such as fuzzy clustering have been successfully used in the various stages of different fuzzy time-series forecasting approaches. Fuzzy clustering, genetic algorithm and particle swarm optimization are generally used in the fuzzification stage, and this simplifies the applicability of this stage and makes the fuzzy time-series approach more systematic. ANNs have also been applied successfully in the fuzzy relationship determination stage. In this study, we propose a new hybrid fuzzy time-series approach in which fuzzy c-means clustering procedure is employed in the fuzzification stage and feed-forward neural networks are used in the fuzzy relationship determination stage. This study also includes an empirical analysis pertaining to the forecasting of Index 100 for the stocks and bonds exchange market of Istanbul. 相似文献
9.
This paper examines whether progress in transition has a significant effect on the economic efficiency for 24 transition countries from 1990 to 2006. It uses nine progress factors to analyze the role of the progress factors to explain inefficiencies. It also questions the effect of the transition countries that recently joined the European Union on efficiency. The results suggest that the average efficiency scores for EU-N10 are much higher than the average efficiency scores for SEE/CIS. The scores increase over time for both groups of transition countries. Reforms also contribute to efficiency in general. 相似文献
10.
Ipek Demir 《Journal of historical sociology》2014,27(3):381-401
Kurds make up about a fifth of Turkey's population. Turkey has taken steps – albeit slowly and reluctantly – towards increased recognition of Kurdish cultural and linguistic rights. However, within Turkey there is also a steeply rising tide of Turkish nationalism, prejudice and intolerance towards Kurds, and increasing anti-Kurdish sentiment. This article brings studies of Kurdishness and Turkishness into a single conversation and traces the relationship between Turkish modernity, Orientalized Kurdishness and the construction of Turkishness as the efendi (master) identity. It does this by drawing attention to “strategies of exclusion and inclusion” in the construction of official Turkish history, and relates these to the way in which the tense borders between Kurds and Turks are maintained and currently reproduced. It also presents a normative argument in favour of “humbling Turkishness” and “solidarity trading zones”. 相似文献