Experimental Research of Body Functional Training on Promoting Physical Quality of College Students

After being introduced into China, body functional training has been widely applied to the training of high-level athletes (Wang & Liu, 2014; Cui & Qiu, 2013). However, it is still in the exploratory stage in college teaching. In this research, body functional training was designed for the physical characteristics of ordinary college students, and the physical health status of students was monitored in order to understand the promoting effect of body functional training on college students\u27 physical quality. It also provides theoretical and data support for the continuous improvement of body functional training courses. The research process was approved by the institutional review board of Zhengzhou University. Participants were 50 freshmen (non-physical education major, 17-19 years) enrolled into a college in central China. Among them, 25 students (13 female students and 12 male students) were selected as one group. The experimental group and the control group were given body functional training and normal physical exercise for 12 weeks (2 times a week, 1 hour each time), while the other physical activities of each group were the same. Physical fitness test and physical fitness item test were conducted before and after the experiment. SPSS 22.0 statistical software was used to conduct paired T-test on the data before and after the experiment, and independent sample T-test was conducted on the data before and after the experiment. In terms of physical health, there was no significant difference in body weight and forced vital capacity in the control group (P \u3e 0.05), but significant change in body weight (P \u3c 0.05) and significant increase in FVC (P \u3c 0.01) were observed in the experimental group. From the perspective of physical fitness, the results of the control group showed an improvement trend but not reached a statistical significance (P \u3e 0.05), while the flexibility of the experimental group showed a very significant change (P \u3c 0.01), the strength of lower limbs and upper limbs increased significantly (P \u3c 0.05), and the endurance improved significantly (P \u3c 0.05). The differences between the experimental group and the control group were statistically significant. Body functional training can improve the physical fitness of college students and has a positive effect on improving their physical fitness. In addition, body functional training can be used as an effective training method in college physical education. However, due to the limited of time and ability, experiments were conducted for only 12 weeks, future researchers could make more detailed studies on this training method

Analysis of an Imported Subgenotype C2 Strain of Human Enterovirus 71 in Beijing, China, 2015

Background: Subgenotype C4 of enterovirus 71 (EV71) is the predominant agent of Hand Foot and Mouth disease (HFMD) circulating in the mainland of China. For the first time, a subgenotype C2 of EV71 named SY30-2 was isolated from a HFMD case in Beijing, China. Since it is uncertain whether antibodies raised against subgenotype C4 of EV71 can protect C2 EV71, it is important to monitor and check the presence of cross-reactive antibodies against new EV71 subgenotypes. To find out the causes for the different NtAb, this study is to investigate the relationships between amino acid residue variations and cross-reactive antibodies against EV71 subgenotypes C2 and C4.Methods: Nucleotide and amino acid sequences from full-length genome sequence of SY30-2 were compared to EV71 reference strains. A microneutralization test was used to detect neutralizing antibody (NTAb) in the sera of subgenotype C4 of EV71 infected cases against SY30-2 and FY17 (a C4 isolate). The 3D structure of the viral capsid protein of SY30-2 was constructed.Results: Genome sequence and similarity plot analyses showed that SY30-2 shared the highest identity with subgenotype C2 of EV71 strains in every fragment of the genome. While the microneutralization test result showed that children infected with subgenotype C4 of EV71 had higher NTAb titers against FY17 than SY30-2 (p < 0.001). The amino acid sequence comparison revealed that four amino acid residues VP1-22, VP1-31, VP1-249 and VP3-93 were highly conserved in subgenotype C4 of EV71 compared with the corresponding amino acid residues on subgenotype C2 of EV71 (p < 0.05). Furthermore, the 3D-structure of viral capsid protein showed that VP1-22, VP1-31 and VP3-93 were located on the surface of virion.Conclusion: This is the first report of an EV71 subgenotype C2 isolated from HFMD in Beijing, China. Only a few antigenic variations on subgenotype C2 of EV71 could have led to a great decrease in NTAb titer. Thus, imported new genotypes and subgenotypes of EV71 should be closely monitored. The efficacy of available vaccines against new viruses should be evaluated as well

Molecular simulation on mechanism of thiophene hydrodesulfurization on surface of NiP

Hydrodesulfurization reaction, as the last step of hydrothermal cracking reaction, is of great significance for the reduction of viscosity and desulfurization of heavy oil. Based on Density Functional Theory and using Dmol3 module of Materials Studio, this research simulated the adsorption and hydrodesulfurization of thiophene on Ni 2 P (001) surface, and discussed the hydrodesulfurization reaction mechanism of thiophene on Ni 2 P (001) surface. It was found that the direct hydrodesulfurization of thiophene had more advantages than the indirect hydrodesulfurization of thiophene. Finally, the optimal reaction path was determined: C 4 H 4 S+H 2 →C 4 H 6

Point Cloud Semantic Segmentation Network Based on Multi-Scale Feature Fusion

The semantic segmentation of small objects in point clouds is currently one of the most demanding tasks in photogrammetry and remote sensing applications. Multi-resolution feature extraction and fusion can significantly enhance the ability of object classification and segmentation, so it is widely used in the image field. For this motivation, we propose a point cloud semantic segmentation network based on multi-scale feature fusion (MSSCN) to aggregate the feature of a point cloud with different densities and improve the performance of semantic segmentation. In our method, random downsampling is first applied to obtain point clouds of different densities. A Spatial Aggregation Net (SAN) is then employed as the backbone network to extract local features from these point clouds, followed by concatenation of the extracted feature descriptors at different scales. Finally, a loss function is used to combine the different semantic information from point clouds of different densities for network optimization. Experiments were conducted on the S3DIS and ScanNet datasets, and our MSSCN achieved accuracies of 89.80% and 86.3%, respectively, on these datasets. Our method showed better performance than the recent methods PointNet, PointNet++, PointCNN, PointSIFT, and SAN

Late Paleozoic Chingiz and Saur Arc Amalgamation in West Junggar (NW China): Implications for Accretionary Tectonics in the Southern Altaids

International audienceThe Saur-Chingiz Belt (SCB) in northern West Junggar is regarded as the amalgamation zone of the Saur and Chingiz arcs. It contains diagnostic rocks of accretionary origin, providing critical information about the evolution of the southern Paleo-Asian Ocean. We recognize various lithologies in the SCB, including an ophiolitic mélange, turbidites, conglomerates, rhyolites, breccias, and diorites, and investigate the structures of the Hebukesaier ophiolitic mélange. Kinematic analysis indicates top-to-the-N thrusting. A coarse-grained gabbro (ca. 490 Ma) and a fine-grained gabbro (ca. 318 Ma) have normal mid-ocean ridge basalt (N-MORB)-type geochemical signatures, and three groups of pillow basalts exhibit N-MORB, enriched mid-ocean ridge basalt (E-MORB), and ocean island basalts (OIB) fingerprints, respectively. Detrital zircons in tuffs, conglomerates, and turbidites associated with the Hebukesaier mélange display predominant ages of 410-440 Ma, which are consistent with the age of the Chingiz Arc. This suggests that the mafic rocks (ophiolitic components) in the Hebukesaier mélange were generated at a mid-ocean ridge and were later accreted to the Chingiz Arc, which formed above a southward-dipping subduction zone that consumed the Paleo-Asian Ocean. The predominant zircon age peaks of turbidites from the Saur area, north of the Hebukesaier mélange, range from 326 to 360 Ma, which areconsistent with a provenance from the Saur Arc. The distinctive detrital zircons of the Chingiz and Saur arcs indicate that the northern boundary of the Hebukesaier mélange is the tectonic boundary between the Chingiz and Saur arcs. We suggest that Paleo-Asian Ocean closed before Late Triassic as indicated by a diorite vein (ca. 218 Ma) that intruded the Hebukesaier mélange