作者：
Li, Sijia;Pan, Wei;Yip, Paul Siu Fai;Wang, Jing;Zhou, Wenwei;...
期刊：
Computers in Human Behavior,2024年152:108080 ISSN：0747-5632
通讯作者：
Pan, W;Yip, PSF
作者机构：
[Pan, Wei; Zhou, Wenwei; Wang, Jing] Univ Hong Kong, Fac Social Sci, Dept Social Work & Social Adm, Hong Kong, Peoples R China.;[Pan, Wei; Zhou, Wenwei; Wang, Jing] Minist Educ, Key Lab Adolescent Cyberpsychol & Behav CCNU, Wuhan, Peoples R China.;[Pan, Wei; Zhou, Wenwei; Wang, Jing] Cent China Normal Univ, Sch Psychol, Wuhan, Peoples R China.;[Yip, Paul Siu Fai] Key Lab Human Dev & Mental Hlth Hubei Prov, Wuhan, Peoples R China.;[Zhu, Tingshao] Univ Hong Kong, Hong Kong Jockey Club Ctr Suicide Res & Prevent, Hong Kong, Peoples R China.
通讯机构：
[Pan, W ] C;[Yip, PSF ] U;Cent China Normal Univ, Sch Psychol, 152 Luoyu Rd, Wuhan 430079, Hubei, Peoples R China.;Univ Hong Kong, Fac Social Sci, Dept Social Work & Social Adm, Room 511,Jockey Club Tower,Centennial Campus, Pokfulam, Hong Kong, Peoples R China.
摘要：
Depression has been identified as a risk factor for suicide, yet limited evidence has elucidated the underlying pathways linking depression to subsequent suicide risk. Therefore, we aimed to examine the psychological mechanisms that connect depression to suicide risk via linguistic characteristics on Weibo. We sampled 487,251 posts from 3196 users who belong to the depression super-topic community (DSTC) on Sina Weibo as the depression group, and 357,939 posts from 5167 active users as the control group. We employed the double machine learning method (DML) to estimate the impact of depression on suicide risk, and interpreted the pathways from depression to suicide risk using SHapley Additive exPlanations (SHAP) values and tree in-terpreters. The results indicated an 18% higher likelihood of suicide risk in the depression group compared to people without depression. The SHAP values further revealed that Exclusive (M = 0.029) was the most critical linguistic feature. Meanwhile, the three-depth tree interpreter illustrated that the high suicide risk subgroup of the depression group (N = 1196, CATE = 0.32 +/- 0.04, 95%CI [0.20, 0.43]) was predicted by higher usage of Exclusive (>0.59) and Health (>-0.10). DML revealed pathways linking depression to suicide risk. The visualized tree interpreter showed cognitive complexity and physical distress might be positively associated with suicide risk in depressed populations. These findings have invigorated further investigation to elucidate the relationship between depression and suicide risk. Understanding the underlying mechanisms serves as a basis for future research on suicide prevention and treatment for individuals with depression.
作者：
Wenqin Ren;Linggui Wei*;Jinlong Xu;Yun Qin;Xinhai Lu
期刊：
Urban Science,2024年8(2):40- ISSN：2413-8851
通讯作者：
Linggui Wei
作者机构：
School of Politics and Public Administration, Guangxi Min zu University, Nanning 530006, China;Institution for Finance and Economics, Guangxi University of Finance and Economics, Nanning 530003, China;Author to whom correspondence should be addressed.;[Wenqin Ren; Jinlong Xu; Yun Qin; Xinhai Lu] School of Public Administration, Central China Normal University, Wuhan 430079, China;[Linggui Wei] School of Politics and Public Administration, Guangxi Min zu University, Nanning 530006, China<&wdkj&>Institution for Finance and Economics, Guangxi University of Finance and Economics, Nanning 530003, China<&wdkj&>Author to whom correspondence should be addressed.
通讯机构：
[Linggui Wei] S;School of Politics and Public Administration, Guangxi Min zu University, Nanning 530006, China<&wdkj&>Institution for Finance and Economics, Guangxi University of Finance and Economics, Nanning 530003, China<&wdkj&>Author to whom correspondence should be addressed.
摘要：
As a result of rapid urbanization in China, the spatial restructuring of towns and cities has significantly impacted urban compactness. The study of the spatio–temporal characteristics and driving mechanisms of urban compactness in central China is a strategic imperative and conducive to promoting regional sustainable development that is based on easing the contradiction between land resource supply and demand and reducing energy consumption. Therefore, this study focused on 80 prefecture-level cities in central China, utilizing barycenter model and GTWR model, among others, to analyze the spatio–temporal evolution pattern of urban compactness from 2006 to 2020 and its driving factors, with the aim of uncovering the intrinsic mechanisms behind enhancing urban compactness in the area. The results show the follows: (1) The urban compactness in central China has generally shown an upward trend, with a pronounced spatial clustering around provincial capital cities and the spatial changes in compactness predominantly concentrated in the north–south direction. (2) Various factors have influenced urban compactness, where government intervention and population aggregation present as bi-directional driving factors, while the effective use of land resources and high-quality industrial development, among others, present as positive driving factors. The spatio–temporal heterogeneity and agglomeration features of each driving factor are significant. (3) Further analysis indicates that the effective use of land resources is the primary factor in enhancing urban compactness, followed by technology. Therefore, we should adhere to the concept of compact cities and gradually promote the compactness of cities in central China based on the impact of the driving factors.
期刊：
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,2024年146(9):6307-6316 ISSN：0002-7863
通讯作者：
Chen, FE;Zhou, H
作者机构：
[Zhao, Fei; Dong, Jianghu; Wang, Wei; Chen, Fen-Er; Yan, Qiongjiao; Xuan, Liangming; Chen, Qinlin; Fan, Rundong; Wang, Haifeng] Wuhan Inst Technol, Pharmaceut Res Inst, Sch Chem Engn & Pharm, Wuhan 430205, Peoples R China.;[Zhou, Hui] Cent China Normal Univ, Coll Chem, Wuhan 430079, Hubei, Peoples R China.;[Chen, Fen-Er] Fudan Univ, Engn Ctr Catalysis & Synth Chiral Mol, Dept Chem, Shanghai 200433, Peoples R China.;[Chen, Fen-Er] Shanghai Engn Ctr Ind Catalysis Chiral Drugs, Shanghai 200433, Peoples R China.
通讯机构：
[Zhou, H ] C;[Chen, FE ] W;Wuhan Inst Technol, Pharmaceut Res Inst, Sch Chem Engn & Pharm, Wuhan 430205, Peoples R China.;Cent China Normal Univ, Coll Chem, Wuhan 430079, Hubei, Peoples R China.;Fudan Univ, Engn Ctr Catalysis & Synth Chiral Mol, Dept Chem, Shanghai 200433, Peoples R China.
摘要：
Saturated hydrocarbon bonds are ubiquitous in organic molecules; to date, the selective functionalization of C(sp(3))-H bonds continues to pose a notorious difficulty, thereby garnering significant attention from the synthetic chemistry community. During the past several decades, a wide array of powerful new methodologies has been developed to enantioselectively modify C(sp(3))-H bonds that is successfully applied in asymmetric formation of diverse bonds, including C-C, C-N, and C-O bonds; nevertheless, the asymmetric C(sp(3))-H alkylation is elusive and, therefore, far less explored. In this work, we report a direct and robust strategy to construct highly valuable enantioenriched unnatural α-amino acid (α-AA) cognates and peptides by a copper-catalyzed enantioselective remote C(sp(3))-H alkylation of N-fluorocarboxamides and readily accessible glycine esters under ambient conditions. The key to success lies in the optically active Cu catalyst generated through the coordination of glycine derivatives to enantiopure bisphosphine/Cu(I) species, which is beneficial to the single electronic reduction of N-fluorocarboxamides and the subsequent stereodetermining alkylation. More importantly, all types (primary, secondary, tertiary, and even α-oxy) of δ-C(sp(3))-H bonds could be site- and stereospecifically activated by the kinetically favored 1,5-hydrogen atom transfer (1,5-HAT) step.
作者机构：
[Yi, Cong; Yi, C; Pu, Shi] Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Anhui, Peoples R China.;[Wu, Xiang -Yu; Qin, Guang-You] Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Hubei, Peoples R China.;[Wu, Xiang -Yu; Qin, Guang-You] Cent China Normal Univ, Key Lab Quark & Lepton Phys MOE, Wuhan 430079, Hubei, Peoples R China.;[Yang, Di-Lun] Acad Sinica, Inst Phys, Taipei 11529, Taiwan.;[Gao, Jian-Hua] Shandong Univ, Inst Space Sci, Shandong Prov Key Lab Opt Astron & Solar Terr Envi, Weihai 264209, Shandong, Peoples R China.
通讯机构：
[Yi, C ] U;Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Anhui, Peoples R China.
摘要：
We investigate the azimuthal angle dependent local hydrodynamic helicity polarization of Λ hyperons, defined as the projection of the spin polarization vector along the directions of particle momenta, at BNL Relativistic Heavy Ion Collider beam energy scan energies by utilizing the relativistic ( 3+1 )D CLVisc hydrodynamics framework with SMASH initial conditions. As opposed to local spin polarization at high energy collisions, our hydrodynamic simulations demonstrate that the azimuthal angle dependent helicity polarization induced by the kinetic vorticity dominates over other contributions at intermediate and low collision energies. Our findings provide an opportunity to probe the fine structure of local kinetic vorticity as a function of azimuthal angle at intermediate and low collision energies by mapping our predictions to the future measurements in experiments.
作者机构：
Key Laboratory of Adolescent Cyberpsychology and Behavior (CCNU), Ministry of Education, Wuhan, China;School of Psychology, Central China Normal University, Wuhan, China;[Lu Huang] School of Marxism, Wuhan Business University, Wuhan, China;[Youzhi Song; Yuan Tian; Cuiying Fan; Quan Zheng; Zongkui Zhou] Key Laboratory of Adolescent Cyberpsychology and Behavior (CCNU), Ministry of Education, Wuhan, China<&wdkj&>School of Psychology, Central China Normal University, Wuhan, China
通讯机构：
[Zongkui Zhou] K;Key Laboratory of Adolescent Cyberpsychology and Behavior (CCNU), Ministry of Education, Wuhan, China<&wdkj&>School of Psychology, Central China Normal University, Wuhan, China
摘要：
Early research has revealed distinct subgroups of cyberbullying victims. However, due to the limitations of traditional statistical methods, the characterization of features in the subgroups has been relatively limited, making it challenging to gain a relatively comprehensive understanding of different subgroup members. Decision trees and machine learning techniques offer notable advantages in addressing such issues. The primary aim of this study is to develop a high-performing classifier based on self-reported data from 814 middle school students to accurately predict cyberbullying victimization and uncover the most influential factors. On this basis, the study attempts to identify different subgroups of cyberbullying victims and their shared characteristics. The results indicated that the classification tree achieved a prediction accuracy of approximately 80% on the out-of-sample dataset. The results of permutation feature importance highlighted that the most prominent predictors were the victim’s cyberbullying perpetration, followed by traditional relational victimization and depression. Further examination of the visual tree structure revealed subgroups of cyberbullying victims and their shared characteristics. The findings of this study have enriched the characteristics of different subgroups of cyberbullying victims, providing a better elucidation of the pathology of cyberbullying victimization and offering empirical evidence to facilitate the development of more targeted intervention strategies for various subgroups of cyberbullying victims.
作者机构：
[Zhu, Xiaohua; Li, Yurui] Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China;[Zhang, Yan] Key Laboratory of Geographic Process Analysis & Simulation Hubei Province, Central China Normal University, Wuhan 430079, China;[Zhu, Yuanyuan] Key Laboratory of Geographic Process Analysis & Simulation Hubei Province, Central China Normal University, Wuhan 430079, China. Electronic address: zhuyy990@ccnu.edu.cn
通讯机构：
[Yuanyuan Zhu] K;Key Laboratory of Geographic Process Analysis & Simulation Hubei Province, Central China Normal University, Wuhan 430079, China
期刊：
International Journal of Biological Macromolecules,2024年267(Pt 1):131459 ISSN：0141-8130
通讯作者：
Liu, Leilei
作者机构：
[Liu, Leilei] Center of Applied Biotechnology, School of Life Sciences and Technology, Wuhan University of Bioengineering, Wuhan, Hubei, China. Electronic address: liulei@mails.ccnu.edu.cn;[Wang, Jintao; Xu, Peiwen; Wei, Wei; He, Wenfeng] Center of Applied Biotechnology, School of Life Sciences and Technology, Wuhan University of Bioengineering, Wuhan, Hubei, China;[Xu, Peiwen; He, Wenfeng] College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China;[Liu, Kaiyu] School of Life Sciences, Central China Normal University, Wuhan, Hubei, China
通讯机构：
[Liu, Leilei] C;Center of Applied Biotechnology, School of Life Sciences and Technology, Wuhan University of Bioengineering, Wuhan, Hubei, China. Electronic address:
摘要：
Insect resistance evolution poses a significant threat to the advantages of biopesticides and transgenic crops utilizing insecticidal Cry-toxins from Bacillus thuringiensis (Bt). However, there is limited research on the relationship between transcriptional regulation of specific toxin receptors in lepidopteran insects and their resistance to Bt toxins. Here, we report the positive regulatory role of the SfGATAe transcription factor on the expression of the ABCC2 gene in Spodoptera frugiperda. DNA regions in the SfABCC2 promoter that are vital for regulation by SfGATAe, utilizing DAP-seq technology and promoter deletion mapping. Through yeast one-hybrid assays, DNA pull-down experiments, and site-directed mutagenesis, we confirmed that the transcription factor SfGATAe regulates the core control site PBS2 in the ABCC2 target gene. Tissue-specific expression analysis has revealed that SfGATAe is involved in the regulation and expression of midgut cells in the fall armyworm. Silencing SfGATAe in fall armyworm larvae resulted in reduced expression of SfABCC2 and decreased sensitivity to Cry1Ac toxin. Overall, this study elucidated the regulatory mechanism of the transcription factor SfGATAe on the expression of the toxin receptor gene SfABCC2 and this transcriptional control mechanism impacts the resistance of the fall armyworm to Bt toxins.
作者：
Ablikim, M.;Achasov, M. N.;Adlarson, P.;Ai, X. C.;Aliberti, R.;...
期刊：
Journal of High Energy Physics,2024年(1) ISSN：1029-8479
通讯作者：
Ablikim, M
作者机构：
[Li, Xiaoyu; Hu, T.; Chen, T.; Hou, X. T.; Heng, Y. K.; Ji, Q.; Guan, C. Y.; Liao, Y. P.; Ji, X. B.; Dong, M. Y.; Fang, S. S.; Chang, J. F.; Ding, B.; Fu, C. D.; Lin, T.; Cao, G. F.; Fu, Y. W.; Jiang, X. S.; Kiuchi, R.; Gu, M. H.; Dong, L. Y.; Li, L. J.; Fang, Y.; Ji, X. L.; Li, L. K.; Li, H. B.; Liang, H.; Huang, Y. P.; Batozskaya, V.; Chen, X. T.; He, K. L.; Chen, G.; Ablikim, M.; Chang, W. L.; Jing, M. Q.; Chen, Y. B.; Du, M. C.; Ablikim, M; Dong, J.; Chen, M. L.; Hou, G. Y.; Hou, Z. L.; Liu, B. J.; Li, Ke; Chen, H. S.; Cao, N.; Deng, Z. Y.; Cai, X.; Kui, X.; Li, W. G.; Fang, J.; Hu, H. M.; Gong, W. X.; Hu, Y.; Li, F.; Li, G.; Dai, H. L.; Li, W. D.; Fang, W. X.] Inst High Energy Phys, Beijing 100049, Peoples R China.;[Yuan, L.] Beihang Univ, Beijing 100191, Peoples R China.;[Li, Lei] Beijing Inst Petrochem Technol, Beijing 102617, Peoples R China.;[Jaeger, S.; Fritsch, M.; Kuessner, M.; Pelizaeus, M.; Kopf, B.; Wollenberg, L.; Holtmann, T.; de Boer, R. E.; Feldbauer, F.; Wiedner, U.; Heinsius, F. H. H.; Coen, S. C.; Wenzel, C. W.] Bochum Ruhr Univ, D-44780 Bochum, Germany.;[Achasov, M. N.; Nikolaev, I. B.; Muchnoi, N. Yu.] Budker Inst Nucl Phys SB RAS BINP, Novosibirsk 630090, Russia.
通讯机构：
[Ablikim, M ] I;Inst High Energy Phys, Beijing 100049, Peoples R China.
关键词：
e(+)-e(-) Experiments;Particle and Resonance Production;Spectroscopy
摘要：
Based on e(+)e(-) collision data collected at center-of-mass energies from 2.000 to 3.080 GeV by the BESIII detector at the BEPCII collider, a partial wave analysis is performed for the process e(+)e(-) -> (KSKL0)-K-0 pi(0). The results allow the Born cross sections of the process e(+)e(-) -> (KSKL0)-K-0 pi(0), as well as its subprocesses e(+)e(-) -> K*(892)K-0(0) over bar and K-2*(1430)K-0(0) to be measured. The Born cross sections for e(+)e(-) -> (KSKL0)-K-0 pi(0) are consistent with previous measurements by BaBar, but with substantially improved precision. The Born cross section lineshape of the process e(+)e(- )-> K*(892)K-0(0) is consistent with a vector meson state around 2.2 GeV with a significance of 3.2 sigma. A Breit-Wigner fit determines its mass as M-Y = (2164.7 +/- 9.1 +/- 3.1) MeV/c(2) and its width as Gamma(Y) = (32.4 +/- 21.0 +/- 1.8) MeV.
期刊：
Journal of Mathematical Analysis and Applications,2024年529(1):127609 ISSN：0022-247X
通讯作者：
Yang, YQ
作者机构：
[Zhang, Yan-fang] Huzhou Univ, Sch Sci, Huzhou 313000, Peoples R China.;[Yang, Yong-qiang] Cent China Normal Univ, Dept Math & Stat, Wuhan 430079, Peoples R China.
通讯机构：
[Yang, YQ ] C;Cent China Normal Univ, Dept Math & Stat, Wuhan 430079, Peoples R China.
关键词：
Self-affine sponge;Maximal power law;Component-counting measure
摘要：
Let (E, ) be a metric space and let hE (5) be the cardinality of the set of 5-connected components of E. In literature, in case of that E is a self-conformal set satisfying the open set condition or E is a self-affine Sierpinski sponge, necessary and sufficient condition is given for the validity of the relation hE(5) x 5- dimB E, when 5 & RARR; 0. In this paper, we generalize the above result to self-affine sponges of LalleyGatzouras type; actually in this case, we show that there exists a Bernoulli measure & mu; such that for any cylinder W, it holds that hW (5) x & mu;(W )5- dimB E, when 5 & RARR; 0.& COPY; 2023 Elsevier Inc. All rights reserved.
作者：
Ablikim, M.;Achasov, M. N.;Adlarson, P.;Ai, X. C.;Aliberti, R.;...
期刊：
PHYSICAL REVIEW D,2024年109(1) ISSN：2470-0010
通讯作者：
Ablikim, M
作者机构：
[Yu, B. X.; Yu, G.; Li, Xiaoyu; Hu, T.; Ning, Z.; Zhang, P.; Wen, S. P.; Shi, X.; Sun, G. X.; Ma, M. M.; Zhao, Ling; Chen, T.; Zhu, Z. A.; Xu, G. F.; Wang, K.; Zhou, L. P.; Heng, Y. K.; Ji, Q.; Zhang, J. W.; Rong, G.; Guan, C. Y.; Qi, F. Z.; Wang, Y. F.; Ouyang, Q.; Zhang, A. Q.; Ji, X. B.; Qian, S.; Dong, M. Y.; Zhang, Jiawei; Fang, S. S.; Chang, J. F.; Liu, Z. A.; Yan, X. Q.; Wu, J. F.; Wang, Yaqian; Sun, S. S.; Ding, B.; Fu, C. D.; Lou, X. C.; Lin, T.; Zhang, B. X.; Xing, T. Y.; Cao, G. F.; Wu, L. H.; Zhao, Y. B.; Fu, Y. W.; Zheng, J. P.; Jiang, X. S.; Kiuchi, R.; Gu, M. H.; Lu, Y. P.; Dong, L. Y.; Zhang, H. Q.; Zhao, G.; Wu, L. J.; Li, L. J.; Yang, Yifan; Yuan, Y.; Lu, X. L.; Wu, Z.; Fang, Y.; Luo, X. L.; Ji, X. L.; Zhang, X. M.; Li, L. K.; Li, H. B.; Liang, H.; Huang, Y. P.; Zhang, J. Y.; Yin, J. H.; Batozskaya, V.; Liu, Huanhuan; Song, W. M.; Chen, X. T.; Zhang, J. Z.; He, K. L.; Chen, G.; Ablikim, M.; Liu, C. X.; Chang, W. L.; Zhu, K.; Zhao, J. Z.; Yang, Tao; Mao, Z. P.; Xiao, S. Y.; Lu, J. G.; Liu, P. L.; Jing, M. Q.; Sun, H. K.; Chen, Y. B.; Zhang, Shuihan; Wang, Z.; Ablikim, M; Liu, Fang; K, X.; Zhao, J. Y.; Dong, J.; Liu, K.; Shi, J. Y.; Wang, H. P.; Yuan, C. Z.; Tang, G. Y.; Yuan, S. C.; Zhang, H. Y.; Chen, M. L.; Zhang, Z. H.; Hou, G. Y.; Shen, H. F.; Shao, L. G.; Hou, Z. L.; Sun, Y. Z.; Liu, B. J.; Li, Ke; Zhu, K. J.; Liu, H. M.; Xu, C. F.; Ma, H. L.; Sun, T.; Ye, M.; Xie, Y. G.; Chen, H. S.; Cao, N.; Deng, Z. Y.; Ma, Q. M.; Wang, Z. Y.; Cai, X.; Yuan, X. Q.; Zhang, Y. H.; Ma, R. Q.; Shi, R. S.; Zheng, W. J.; Zou, J. H.; Zhang, Yao; Liu, J. Y.; Li, W. G.; Wang, Y. Q.; Mo, X. H.; Fang, J.; Shen, X. Y.; Ma, X. Y.; Hu, H. M.; Gong, W. X.; Xu, W.; Hu, Y.; Wang, B.; Zhang, B. L.; Ma, J. L.; Wang, Meng; Yang, Y. X.; Miao, H.; Li, F.; Lu, Z. H.; H, X. T.; Yang, H. X.; Qin, Z. H.; Li, G.; Ping, R. G.; Qiu, J. F.; Dai, H. L.; Li, W. D.; Fang, W. X.; Zeng, Y. J.] Inst High Energy Phys, Beijing 100049, Peoples R China.;[Yuan, L.] Beihang Univ, Beijing 100191, Peoples R China.;[Li, Lei] Beijing Inst Petrochem Technol, Beijing 102617, Peoples R China.;[Jaeger, S.; Fritsch, M.; Li, M. H.; Wiedner, U. W.; Pelizaeus, M.; Kuessner, M. K.; Kopf, B.; Wollenberg, L.; Holtmann, T.; de Boer, R. E.; Feldbauer, F.; Heinsius, F. H. H.; Maldaner, S.; Coen, S. C.; Wenzel, C. W.] Bochum Ruhr Univ, D-44780 Bochum, Germany.;[Briere, R. A.] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA.
通讯机构：
[Ablikim, M ] I;Inst High Energy Phys, Beijing 100049, Peoples R China.
摘要：
The Born cross sections and effective form factors of the process e(+) e(-) -> Lambda(Sigma) over bar (0) + c:c: are measured at 14 center-of -mass energy points from 2.3094 to 3.0800 GeV, based on data corresponding to an integrated luminosity of (478.5 +/- 4.8) pb(-1) collected with the BESIII detector. A nonzero Born cross section is observed at the center-of-mass energy of 2.3094 GeV with a statistical significance of more than five standard deviations, and the cross sections at other energies are obtained with improved precision compared to earlier measurements from the BABAR Collaboration. The Born cross-section line shape is described better by a shape considering the strong -interaction effects than by a pQCD motivated functional form.
作者机构：
[Chang, CH; Ho, Chia-An; Chang, Chun-Hao; Yeh, Hung-Chih; Chen, Chao-Yuan; Ho, Chin-Shan] Natl Taiwan Sport Univ, Grad Inst Sports Sci, Taoyuan City, Taiwan.;[Li, Fang] Cent China Normal Univ, Sch Phys Educ, Wuhan, Hubei, Peoples R China.;[Chen, Chao-Yuan] Natl Taipei Univ Business, Sport Off, Taipei City, Taiwan.
通讯机构：
[Chang, CH ] N;Natl Taiwan Sport Univ, Grad Inst Sports Sci, Taoyuan City, Taiwan.
关键词：
Mechanical property;Myometer;Rowing;Symmetry index
摘要：
BACKGROUND: The mechanical properties of muscles, such as changes in muscle tone and stiffness, are related to sports performance and injuries. Rowers are at increased risk of muscle fatigue and injury during high-repetition and heavy-load cyclic muscle actions. In view of this, the aim of the present study was to investigate the acute effect on muscle tone and stiffness, as well as bilateral muscle asymmetry, in high school rowers after a 2000-meter rowing ergometer test. METHODS: Twelve young male rowers (age = 17.1 ± 0.9 years, body weight = 73.5 ± 9.7 kg) were included in the study. The data of muscle tone (frequency) and stiffness of the posterior deltoids (PD), latissimus dorsi (LD), and rectus femoris (RF) (dominant and non-dominant side) before and after a 2000-m rowing ergometer test were collected using a handheld MyotonPRO device. RESULTS: After the rowing ergometer test, the muscle tone of dominant side PD, LD, and RF were significantly increased (p < 0.05). On the other hand, the muscle stiffness of the non-dominant side LD and RF, as well as the dominant side PD, LD, and RF were significantly increased after the rowing ergometer test (p < 0.05). The muscle tone and stiffness results showed that the dominant side PD, LD, and RF were all significantly higher than the non-dominant side after the rowing ergometer test (p < 0.05), where bilateral PD and RF exhibits moderate asymmetry (5% < symmetry index < 10%). CONCLUSIONS: After a high-intensity and high-load 2000-m rowing ergometer test, PD, LD, and RF showed increases in muscle tone and stiffness, as well as changes in the symmetry of bilateral muscle mechanical properties.
摘要：
Linear complementary dual (LCD) codes can provide an optimum linear coding solution for the two-user binary adder channel. LCD codes also can be used to against side-channel attacks and fault non-invasive attacks. Let dLCD(n,k) denote the maximum value of d for which a binary [n,k,d] LCD code exists. In \cite{BS21}, Bouyuklieva conjectured that dLCD(n+1,k)=dLCD(n,k) or dLCD(n,k)+1 for any lenth n and dimension k >= 2. In this paper, we first prove Bouyuklieva's conjecture \cite{BS21} by constructing a binary [n,k,d-1] LCD codes from a binary [n+1,k,d] LCDo,e code, when d >= 3 and k >= 2. Then we provide a distance lower bound for binary LCD codes by expanded codes, and use this bound and some methods such as puncturing, shortening, expanding and extension, we construct some new binary LCD codes. Finally, we improve some previously known values of d(LCD)(n,k) of lengths 38 <= n <= 40 and dimensions 9 <= k <= 15. We also obtain some values of d(LCD)(n,k) with 41 <= n <= 50 and 6 <= k <= n-6.
作者机构：
[Lv, Zhiwei] School of Education, Central China Normal University, Wuhan, Hubei, 430079, China;[Lv, Zhiwei] School of Foreign Languages, Shaoxing University, Shaoxing, Zhejiang, 312000, China;[Ying, Changtian] School of Mechanical and Electrical Engineering, Shaoxing University, Shaoxing, Zhejiang, 312000, China;[Chen, Jiayi] Youth League Committee, Shaoxing University, Shaoxing, Zhejiang, 312000, China
摘要：
BACKGROUND: Moral education in colleges and universities is an important part of the talent training system, including moral education curriculum, moral education practice, mental health education. Volunteer service is a public welfare act in which volunteers volunteer their time, knowledge, property, technology, with the ultimate goal of helping others and serving the society without personal compensation. As an innovative form of moral education practice in colleges and universities, college students' voluntary service is of great significance in promoting the reform and innovation of moral education, enhancing the affinity, appeal and influence of moral education, and building a positive psychology for college students. SUBJECTS AND METHODS: As an effective carrier of moral education practice in colleges and universities, voluntary service is helpful to enhance the effectiveness of moral education practice and construct the positive psychology of college students. This project is based on the actual situation of college students participating in volunteer services, and collected the volunteer services of 4545 college students in Zhejiang Province. Through model construction and data modeling, the correlation between college students' participation in volunteer service and their moral education performance and mental health was analyzed, and the basic path and guarantee measures to promote the role of volunteer service in moral education and positive psychological construction were deeply explored. RESULTS: From the correlation analysis of students' voluntary service participation, moral education performance and voluntary service motivation, students' attributes are determined according to their voluntary service participation, so as to predict their moral education performance and mental health level. CONCLUSION: College students' voluntary service is partially positively related to their moral education performance and mental health. In order to improve students' moral education performance and mental health, we can optimize the participation frequency, participation duration, participation ways and type structure of voluntary service, constantly increase the participation frequency of voluntary service, increase the duration of voluntary service, broaden the participation ways of voluntary activities, and enrich the types of voluntary service activities.
