乡村振兴视域下温州乡村旅游景点空间结构演化机理研究     

涂倩  苏醒醒 《中阿科技论坛(中英文)》2023,(2):44-48

文章以温州3A级景区村庄为研究对象,选取2017年、2019年、2021年相关数据,分析了温州3A级景区村庄空间分布规律及其影响因素。研究表明：（1）2017—2021年温州3A级景区村庄数量呈逐年增加趋势,但增速变缓,各县（市、区）3A级景区村庄空间分布不均衡。（2）温州3A级景区村庄,由低密度的“面状”向中、高密度的“片状”“团状”演化;“东北多,西南多,中间少”的空间分布初步形成。（3）运用地理联系率分析温州3A级景区村庄空间结构演化的影响因素,总体来看,各因素对3A级景区村庄发展的影响存在波动性,其中,城镇居民人均可支配收入>农村居民人均可支配收入>农林牧渔业总产值>地区生产总值;而政策环境对3A级景区村庄发展的影响有待增强。  相似文献   

Decision boundaries and receiver operating characteristic curves: new methods for determining accelerometer cutpoints   总被引：2，自引：1，他引：1  

Jago R  Zakeri I  Baranowski T  Watson K 《Journal of sports sciences》2007,25(8):937-944

We propose and evaluate the utility of an alternative method (decision boundaries) for establishing physical activity intensity-related accelerometer cutpoints. Accelerometer data collected from seventy-six 11- to 14-year-old boys during controlled bouts of moderate- and vigorous-intensity field physical activities were assessed. Mean values and standard deviations for moderate- and vigorous-intensity activities were obtained and normal equivalents generated. The decision boundary (the point of intersection of overlapping distributions) was used to create a lower-bound vigorous-intensity cutpoint. Receiver operating characteristic (ROC) curves compared the sensitivity and specificity of the new cutpoint and mean values with the actual activity. There was a 96.5% probability that participants performing vigorous-intensity physical activity were accurately classified when using the decision boundary of 6700 counts per minute, in contrast to the 50% accurately classified when the mean value was used. Inspection of the empirical ROC curve indicated that the decision boundary provided the optimal threshold to distinguish between moderate and vigorous physical activity for this dataset. In conclusion, decision boundaries reduced the error associated with determining accelerometer threshold values. Applying these methods to accelerometer data collected in specific populations will improve the precision with which accelerometer thresholds can be identified.  相似文献   

Curmudgeon or golden-ager?: reported exercise participation influences the perception of older adults     

Greenlees I  Webb H  Hall B  Manley A 《运动与训练心理学杂志》2007,29(3):333-347

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Cross-cultural generalizability of the theory of planned behavior among young people in a physical activity context     

Hagger MS  Chatzisarantis NL  Barkoukis V  Wang JC  Hein V  Pihu M  Soós I  Karsai I 《运动与训练心理学杂志》2007,29(1):2-20

The present study tested the cross-cultural generalizability of the measurement and structural parameters of the theory of planned behavior (TPB) among youth in a physical activity context. Pupils from five cultural groups completed measures of attitudes, subjective norms, perceived behavioral control (PBC), and intentions for physical activity. Five weeks later, participants completed self-report measures of physical activity behavior. Confirmatory factor analyses and multisample structural equation models revealed well-fitting models within each sample with minimal variations in the measurement parameters across cultures. There were a few significant cross-cultural differences in the structural relations among the TPB constructs. Attitudes predicted intentions in all samples (beta range = .300 to .550), whereas the effect of the subjective norms on intention was nonsignificant in all but the Hungarian sample (beta = .243). Conversely, the effect of PBC on intentions was significant (beta range = .302 to .573) in all but the Hungarian sample. Findings support the generalizability of the measures and pattern of effects for the TPB among young people in a physical activity context.  相似文献   

Goal orientation profile differences on perceived motivational climate, perceived peer relationships, and motivation-related responses of youth athletes     

Smith AL  Balaguer I  Duda JL 《Journal of sports sciences》2006,24(12):1315-1327

The aims of this study were twofold: (a) to determine if dispositional achievement goal orientation profiles that are reported in the literature would be observed in a sample of youth athletes, and (b) to examine potential achievement goal orientation profile differences on perceptions of the motivational climate, perceptions of peer relationships, and motivation-related responses. Male soccer players (n=223) aged 9-12 years (mean=10.9, s=0.6) completed a multi-section questionnaire containing assessments of dispositional goal (task, ego) orientations, the perceived task- and ego-involving features of the motivational climate, perceived peer acceptance and friendship quality (positive friendship quality, conflict), perceived ability, soccer enjoyment, and satisfaction with one's performance and the team. Four profiles were observed that closely matched those observed by Hodge and Petlichkoff (2000), though in the present study a lower proportion of participants exhibited achievement goal profiles consisting of relatively high ego orientation. Achievement goal profile differences were found for all variables except positive friendship quality, with a general trend for those reporting relatively lower task goal orientation to exhibit less adaptive responses. Overall, the findings support achievement goal frameworks (e.g. Nicholls, 1989) and suggest that further examination of dispositional achievement goals may afford a deeper understanding of social relationships and motivational processes in youth sport.  相似文献   

俄罗斯萨哈(雅库特)共和国中部热喀斯特湖成因及发育规律     

张晓红  Anatoly N.Nikolaev  Alexey I.Kolmogorov  戴长雷 《黑龙江大学工程学报》2021,12(2):1-6

在全球不断变暖的大环境下, 中国冻土区受气候影响而产生的各类结构性变化已经对人类生活产生相应的负面影响, 而位于俄罗斯西伯利亚地区的萨哈(雅库特)共和国面临同样的问题, 热喀斯特湖的发育对研究区内的领土开发、农耕地开垦、畜牧业等均已产生破坏性影响.借鉴俄罗斯对冻土的丰富研究, 为我国相关研究提供思路.通过梳理相关资料,...  相似文献