Gait recognition is a new technology in biometric recognition and medical treatment which has advantages such as long-distance and non-invasiveness. Depending on the differences between different people's walking postures, we can recognize individuals by characteristics extracted from the images of walking movement. A complete gait recognition process usually includes gait sequence acquisition, gait detection, feature extracting and recognition. In this paper, the commonly used methods of these four processes are introduced, and feature extraction methods are classified from different multi-angle views. And then the new algorithm of multi-view emerged in recent years is highlighted. In addition, this paper summarizes the existing difficulties of gait recognition, and looks into the future development trends of it.
The present paper is aimed to explore the origins of Proteus mirabilis (PM) whorl swarming growth phenomenon. The whorl swarming growth phenomenon of PM was observed by changed bacterial culture inoculation time, humidity, vaccination practices, cultured flat placement, magnetic field, pH and other factors. Bacterial ring spiral direction of rotation is counterclockwise and the volatile growth process of PM was whorl swarming growth phenomenon. Spiro fluctuation phenomenon was of high frequency in the sealing tanks by cultured anytime inoculation, wherever inoculation technique applied or not, the presence or absence of the magnetic field, and wherever the dish position was. The experimental results showed that the whorl swarming growth phenomenon of PM requires specific pH environment, in which the facts may be relative to its genetic characteristics and the Earth's rotation.
ObjectiveTo investigate effect of laparoscopic radical gastrectomy on gastrointestinal motility and gastrointestinal hormones in patients with gastric cancer. MethodsTwo hundred and eighty-nine patients who underwent laparoscopic radical gastrectomy from December 2013 to December 2015 were selected as observation group, 325 patients underwent laparotomy radical gastrectomy during the same period were selected as control group. The postoperative bowel sounds recovery time, the first anal exhaust time, and gastrin, motilin and vasoactive intestinal peptide levels in blood at 12 h before operation and at 24 h after operation were compared between these two groups. ResultsThe baselines had no significant differences between these two groups (P > 0.05). The postoperative bowel sounds recovery time and the first anal exhaust time in the observation group were significantly shorter than those in the control group (P < 0.05). Compared with the levels at 12 h before operation, the gastrin and motilin levels were significantly decreased and the vasoactive intestinal peptide level was significantly increased at 24 h after operation in these two groups (P < 0.05); Compared with the control group, the gastrin and motilin levels at 24 h after operation were significantly increased (P < 0.05) and the vasoactive intestinal peptide level was significantly decreased in the observation group (P < 0.05). ConclusionsPostoperative gastrointestinal motility recovery time in patients undergoing laparoscopic radical gastrectomy is significantly faster than that of laparotomy radical gastrectomy. There is a certain relation between gastrin, motilin or vasoactive intestinal peptide change and operation mode, it might be one of mechanisms of faster recovery of gastrointestinal motility after laparoscopic radical gastrectomy for gastric cancer.
ObjectiveTo observe the ultrastructural changes of vasa vasorum endothelial cells in the walls of the great saphenous vein and splenic vein, and to evaluate the effect of high hydrostatic pressure and hypoxia upon vasa vasorum endothelial cells. MethodsThirty-four varicose great saphenous vein samples and splenic vein samples with portal hypertension were obtained, and the same number of normal great saphenous vein and splenic vein were used as the control groups. Semi-thin sections stained with HE staining vasa vasorum of the adventitia in great saphenous vein and splenic vein were observed for light microscopy. Samples were made into ultrathin-slices again. The ultrastructural changes of endothelial cells were observed under transmission electron microscopy. ResultsIn varicose great saphenous veins and diseased splenic veins, the nuclear architecture of endothelial cells in vasa vasorum were integrity and the distribution of chromatin were normal. In some mitochondria, the trachychromatic groundplasm, undefined and ruptured cristae were found. ConclusionUnder high hydrostatic pressure and hypoxia conditions, the ultrastructure of vasa vasorum endothelial cells between the great saphenous vein and the splenic vein may appear remodeling phenomenon, and both changes are similar.
ObjectiveTo investigate the changes of amount of interstitial cells of Cajal (ICC) and expression of stem cell factor (SCF)/c-Kit in the process of cathartic colon induced by emodin in mice. MethodsA modified cathartic colon mouse model was established. Seventy-two healthy male Kunming (KM) mice were randomly divided into the blank control group and sustained drug delivery group.Morphological changes of colon in mice were observed; frozen section immunofluorescence was used to observed changes of amount of ICC; serum concentrations of SCF were examined by ELISA; Western blot was employed for observation of expression of SCF/c-Kit in colon. ResultsAfter the mice model were completed, the weight of mouse, length and diameter of entire colon were all reduced compared with the blank control group. The amount of ICC appeared to decline in the beginning of the first 6 weeks with emodin used, and significant decreased in 10-12 weeks. The serum concentrations of SCF first began to decline in 4 weeks with emodin used, and significantly decreased in 6 weeks, and continued at a low level after 8 weeks. The expression of c-Kit in colon began to decline in 4 weeks with emodin used and significantly reduced after 8 weeks. Conciusions The amount of ICC appear to slowly decline in the beginning of the first 12 weeks with emodin used, and significant decrease after 12 weeks.The serum concentrations of SCF and expression of c-Kit in colon have the dynamic changes in the meanwhile, and the changes of SCF are earlier than that of c-Kit. The trend of amount ofICC may have a certain relationship with changes of SCF and c-Kit.