Seismic attributes have been widely used in oil and gas exploration and development. However, owing to the complexity of seismic wave propagation in subsurface media, the limitations of the seismic data acquisition sy...Seismic attributes have been widely used in oil and gas exploration and development. However, owing to the complexity of seismic wave propagation in subsurface media, the limitations of the seismic data acquisition system, and noise interference, seismic attributes for seismic data interpretation have uncertainties. Especially, the antinoise ability of seismic attributes directly affects the reliability of seismic interpretations. Gray system theory is used in time series to minimize data randomness and increase data regularity. Detrended fluctuation analysis （DFA） can effectively reduce extrinsic data tendencies. In this study, by combining gray system theory and DFA, we propose a new method called gray detrended fluctuation analysis （GDFA） for calculating the fractal scaling exponent. We consider nonlinear time series generated by the Weierstrass function and add random noise to actual seismic data. Moreover, we discuss the antinoise ability of the fractal scaling exponent based on GDFA. The results suggest that the fractal scaling exponent calculated using the proposed method has good antinoise ability. We apply the proposed method to 3D poststack migration seismic data from southern China and compare fractal scaling exponents calculated using DFA and GDFA. The results suggest that the use of the GDFA-calculated fractal scaling exponent as a seismic attribute can match the known distribution of sedimentary facies.展开更多
Celiac disease is a gluten-related malabsorption in small intestine occurring in genetically susceptible patients. In this disease the risk of many malignancies is increased the most important of which being non-Hodgk...Celiac disease is a gluten-related malabsorption in small intestine occurring in genetically susceptible patients. In this disease the risk of many malignancies is increased the most important of which being non-Hodgkin lymphoma of small intestine. Other malignancies include adenocarcinoma of small intestine and squamous cell carcinoma of esophagus and melanoma. As to our knowledge so far only one case of ceJiac disease associated with hypopharyngeaJ squamous ceil car- cinoma has been reported. In this article we presented a patient suffering from celiac disease with squamous cell carcinoma of hypopharynx. She underwent chemotherapy and radiation therapy, unfortunately however she died because of progress of disease. So, in patients with celiac disease we should pay attention to various malignancies and when cases of cancers are accompanied by malabsorption we must think of celiac disease involvement.展开更多
This paper gives an impetus in quantifying digestible carbohydrates, which are important components of cereals, legumes and vegetables. The HPLC method was applied for the first time in India to estimate the digestibl...This paper gives an impetus in quantifying digestible carbohydrates, which are important components of cereals, legumes and vegetables. The HPLC method was applied for the first time in India to estimate the digestible carbohydrates such as sugars and starches in different branded rice, legumes and vegetable samples which were procured from local market of twin cities of Hyderabad and Secunderabad in Andhra Pradesh State, India. In the present study, we estimated carbohydrates in vitro, mimicking the in vivo condition by incorporating enzymatic digestion. Among the rice varieties the analyzed total soluble sugars were in the range of 5.69% to 9.62%, vegetables 0.0% to 3.72% and legumes 0.04% to 0.98%. Soluble starches in rice samples ranged from 12.51% to 17.64%, in vegetables from 1.73% to 7.28% and in legumes from 23.76% to 38.71%. Insoluble starches in rice samples were observed to be bracketed in between 52.53% to 60.43%, where as in vegetables from 0.58% to 8.83% and in legumes from 16.13% to 29.22%. Concluding our observation, the total amount of starches and total sugars in rice fell in between 74.32% to 80.75%, in vegetables from 1.74% to 16.11%, and in legumes from 39.93% to 68.91%.展开更多
基金supported by the Fundamental Research Funds for the Central Universities(Grant No.2012QNA62)the Natural Science Foundation of Jiangsu Province(Grant No.BK20130201)+1 种基金the Chinese Postdoctoral Science Foundation(Grant No.2014M551703)the National Natural Science Foundation of China(Grant No.41374140)
文摘Seismic attributes have been widely used in oil and gas exploration and development. However, owing to the complexity of seismic wave propagation in subsurface media, the limitations of the seismic data acquisition system, and noise interference, seismic attributes for seismic data interpretation have uncertainties. Especially, the antinoise ability of seismic attributes directly affects the reliability of seismic interpretations. Gray system theory is used in time series to minimize data randomness and increase data regularity. Detrended fluctuation analysis （DFA） can effectively reduce extrinsic data tendencies. In this study, by combining gray system theory and DFA, we propose a new method called gray detrended fluctuation analysis （GDFA） for calculating the fractal scaling exponent. We consider nonlinear time series generated by the Weierstrass function and add random noise to actual seismic data. Moreover, we discuss the antinoise ability of the fractal scaling exponent based on GDFA. The results suggest that the fractal scaling exponent calculated using the proposed method has good antinoise ability. We apply the proposed method to 3D poststack migration seismic data from southern China and compare fractal scaling exponents calculated using DFA and GDFA. The results suggest that the use of the GDFA-calculated fractal scaling exponent as a seismic attribute can match the known distribution of sedimentary facies.
文摘Celiac disease is a gluten-related malabsorption in small intestine occurring in genetically susceptible patients. In this disease the risk of many malignancies is increased the most important of which being non-Hodgkin lymphoma of small intestine. Other malignancies include adenocarcinoma of small intestine and squamous cell carcinoma of esophagus and melanoma. As to our knowledge so far only one case of ceJiac disease associated with hypopharyngeaJ squamous ceil car- cinoma has been reported. In this article we presented a patient suffering from celiac disease with squamous cell carcinoma of hypopharynx. She underwent chemotherapy and radiation therapy, unfortunately however she died because of progress of disease. So, in patients with celiac disease we should pay attention to various malignancies and when cases of cancers are accompanied by malabsorption we must think of celiac disease involvement.
文摘This paper gives an impetus in quantifying digestible carbohydrates, which are important components of cereals, legumes and vegetables. The HPLC method was applied for the first time in India to estimate the digestible carbohydrates such as sugars and starches in different branded rice, legumes and vegetable samples which were procured from local market of twin cities of Hyderabad and Secunderabad in Andhra Pradesh State, India. In the present study, we estimated carbohydrates in vitro, mimicking the in vivo condition by incorporating enzymatic digestion. Among the rice varieties the analyzed total soluble sugars were in the range of 5.69% to 9.62%, vegetables 0.0% to 3.72% and legumes 0.04% to 0.98%. Soluble starches in rice samples ranged from 12.51% to 17.64%, in vegetables from 1.73% to 7.28% and in legumes from 23.76% to 38.71%. Insoluble starches in rice samples were observed to be bracketed in between 52.53% to 60.43%, where as in vegetables from 0.58% to 8.83% and in legumes from 16.13% to 29.22%. Concluding our observation, the total amount of starches and total sugars in rice fell in between 74.32% to 80.75%, in vegetables from 1.74% to 16.11%, and in legumes from 39.93% to 68.91%.
