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Additional file 2: Table S1. Enrollment by site.

Additional file 1: File S1. Study protocol.

Background and Objective: Colorectal serrated polyp is considered as histologically heterogeneous lesions with malignant potential. The aim of the study was to evaluate the endoscopic, clinic and pathologic characteristics of colorectal serrated polyps. Methods: The endoscopic, clinic and pathologic characteristics of 52 cases with colorectal serrated polyps between January 2014 and May 2018 in our hospital were analyzed. retrospectively. Results: The prevalence of serrated polyps was 0.39% (52/13,346). The proportions of hyperplastic polyp (HP), sessile serrated adenoma/polyp (SSA/P), and traditional serrated adenoma (TSA) of all serrated polyps were 61.5%, 17.3%, and 21.2%, respectively, which showed a lower proportion of TSA and SSA/P and a higher proportion of HP. Conclusions: The overall detection rate of colorectal serrated polyps was relatively low, and it is necessary to discriminate between SSAPs and HPs during endoscopic examination because of the malignant potential.

Background and Objective: Colorectal serrated polyp is considered as histologically heterogeneous lesions with malignant potential. The aim of the study was to evaluate the endoscopic, clinic and pathologic characteristics of colorectal serrated polyps. Methods: The endoscopic, clinic and pathologic characteristics of 52 cases with colorectal serrated polyps between January 2014 and May 2018 in our hospital were analyzed. retrospectively. Results: The prevalence of serrated polyps was 0.39% (52/13,346). The proportions of hyperplastic polyp (HP), sessile serrated adenoma/polyp (SSA/P), and traditional serrated adenoma (TSA) of all serrated polyps were 61.5%, 17.3%, and 21.2%, respectively, which showed a lower proportion of TSA and SSA/P and a higher proportion of HP. Conclusions: The overall detection rate of colorectal serrated polyps was relatively low, and it is necessary to discriminate between SSAPs and HPs during endoscopic examination because of the malignant potential. How to cite this:Hua XL, Jun LQ, Feng SX, Jing D, Wen ZY. A retrospective study on pathological and clinical characteristics of 52 cases with the colorectal serrated polyp. Pak J Med Sci. 2019;35(1):257-261. doi: https://doi.org/10.12669/pjms.35.1.238 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

With the rapid integration and development of cloud computing, big data and smart grid, not only the type and accuracy requirements of the collected data are increasing, but also the storage depth is getting higher and higher. In hardware, the dual port RAM design is used to improve the real-time performance of reading and writing, digital filter is used for preprocessing in software, and “Equivalent Normalization (EN)” is used to improve storage depth. These schemes save hardware storage space and improve data transmission efficiency in practical application. So the advantages of dual-core intelligent power meter will be further exploited and brought into play.

Radar networking via various technical measures to improve the ability of the radar system of four anti-jam. Repressive noise because the need to launch multi-orient and large scope interference, power limits become a problem. In this paper on the basis of the characteristics of radar networking and interference power problem presents a measure contain distributed repressive interference and False track interference. Compared with the traditional high-power way of interference, distributed interference has big range interference section; close advantage and can change the shape of the exposure when changing the jammers distribution. Adaptive wave form technology can realize the jamming signal of time and space launch asynchronous, making that the jammer can simultaneously implementation to different radars of radar net false track deceptive jamming be possible. Through the simulation analysis, the composite interference of the distributed repressive interference and false track interference for netted radar can effectively reduce the oppressive interference power, and form an effective interference.

Limited to the methods used before in designing logic circuits, not a same tool could be used to design both the combined circuits and the time-sequential circuits. The symmetrical coordinate system stated in this article can be constructed to represent various states of multi-dimensional logical variables. Using the symmetrical coordinate system, it is not only possible to complete the design of combined circuits, but also to carry out all the procedures needed in the design of time-sequence circuits. Thus the combined circuits and the time-sequential circuits can be easily designed with a same design tool. Examples are given in this article to illustrate how to use the system of symmetrical coordinate to design the logic circuits.

Support vector machine (SVM) can overcome the drawbacks of artificial neural network, which has been widely used for pattern recognition in recent years. In the study, a novel method based on support vector machine and genetic algorithm(GA-SVM) model is adopted to fault diagnosis of turbo-generator, in which genetic algorithm (GA) dynamically optimizes the values of SVM's parameters C and o. The real data sets are used to investigate its feasibility in fault diagnosis of turbo-generator. The experimental results show that GA-SVM has higher diagnostic accuracy than BP neural network.

Most of existing array signals processing methods are based on the homogeneous circular or non-circular sources. However, mixed circular and non-circular sources are frequently encountered in increasingly complex situations. Since the useful properties of the mixed source model are not utilized efficiently, there is significant performance space between the methods based on homogeneous source model and the theoretical bound. In this paper, an enhanced direction-of-arrival(DOA) estimation and identification method for mixed circular and non-circular sources is proposed. Simulation results show that it can improve the resolution capability and the number of mixed sources can be larger than the number of array elements.

Imaging approach based on range-Doppler algorithm for monostatic SAR is extended to bistatic case. Because of that the transmitter and receiver are located separately, the range cell migration phenomena of bistatic SAR is more complicated than that of monostatic case. In this paper, a simple method of range cell migration correction is used instead of interpolation operation in traditional range-Doppler algorithm for monostatic SAR. Point scatter response, range and azimuth resolutions are also discussed. The simulation results are presented.