Objective: To evaluate the value of epicardial adipose tissue (EAT) thickness combined with serum ischemic modified albumin (IMA) concentration in the diagnosis of coronary heart disease.
Methods: A total of 180 patients with coronary heart disease from May 2017 to December 2018 were selected as the case group. After the examination of Judkins coronary angiography, they were grouped according to the results of angiography, including 60 patients in a single-vessel group, 60 patients in a double-vessel group, and 60 patients in a multi-vessel group. Sixty healthy people with physical examinations at our hospital at the same time were selected as the control group. All selected participants were tested for epicardial adipose tissue thickness by echocardiography and serum IMA concentration by albumin cobalt ion binding test.
Results: The EAT thickness and IMA concentration in the single-vessel disease group, double-vessel disease group, and multi-vessel disease group significantly were higher than those in the control group (P < .01). The ROC curve shows that the sensitivity is 53.33% and the specificity is 87.6%, when the EAT thickness is 6.12 mm. The sensitivity is 76.0% and the specificity is 72.3%, when the serum IMA concentration is 72 U/L. When the two were combined, the sensitivity was 40.15% and the specificity was 96.89%. In the parallel test, the sensitivity was 88.3% and the specificity was 65.44%.
Conclusion: Ultrasound detection of EAT thickness and serum IMA concentration has certain reference value for the diagnosis of coronary heart disease. Combined diagnosis can significantly improve the diagnosis rate and accuracy of coronary heart disease.
With the advanced development of data center and network information technology, digital library has become a user sharing platform with a variety of digital information sources, providing users with flexible and diverse personalized services. However, the existing digital library lacks data analysis information and only publishes book information and related borrowing frequency and other information. As an ideal architecture model for library applications, cloud library can integrate distributed digital information sources, optimize digital libraries, and provide users with flexible, diverse, and personalized services. Therefore, based on the related research on cloud library and neural network algorithm, this paper not only focuses on the artificial network algorithm, but also focuses on the concept, features, and method of building the digital library platform based on the artificial network algorithm. Under the support of related theories and technologies of cloud library service platform, it also builds a cloud library intelligent service platform model based on artificial neural network. The research results showed that the time spent by BPNN in processing borrowed books was generally about 6 minutes, while the time required by RNN was 10 minutes. However, the processing of BPNN is not stable. Therefore, when building an intelligent service platform, different algorithms need to be selected according to individual needs.
Different from alumina, magnesium oxide is seldom used in the synthesis of layered double hydroxide. In this work, Mg Al layered double hydroxide with hierarchical structure was synthesized by using porous MgO as precursor via a facile in situ reaction at room temperature. And no chemical reagents are needed to provide an alkaline environment that allows precipitation to form during the synthesis process.Crystal structure, morphology, functional group, and surface features of the porous MgO precursor, the synthesized layered double hydroxide and its calcined product were characterized by X-ray diffraction, Fourier transform infrared techniques. The results demonstrate that the synthesized layered double hydroxide is a pure phase and composed of nanosheets. Moreover, the synthesized layered double hydroxide inherits the morphology of the porous MgO precursor and forms a hierarchical structure. This structure has a large specific surface area (249 m 2 g À1 ) to increase the adsorption properties. Adsorption experimental results show that the maximum adsorption capacities of Congo red and Cr(VI) ions over the synthesized layered double hydroxide were 847.5 and 103.7 mg g À1 , respectively. The adsorption process follows the Langmuir and pseudo-second equation. Both adsorption processes were found to be spontaneous and endothermic.
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