冠心病常见脉象及其与某些流体力学指标的关系探讨

中医诊察疾病,从桡动脉处索取信息,所得脉象,实际上是心脏舒缩而产生的脉搏波在桡动脉处所呈现的形态、强度、速率、节律等方面的综合反映。桡动脉脉搏波随着人体流体力学一些参数的变化而变化。本文探讨120例冠心病患者的常见脉象及其与桡动脉搏图、血液流变学、甲皱微循环等指标的关系。

大学女教师体力健康指标与代谢综合征的相关性研究分析

目的:通过构建体力健康指标预测大学女教师代谢综合征(MetS)的logistics回归方程,探讨大学女教师体力健康指标与MetS之间的关系,为MetS对大学女教师的诊断因素提供研究价值。方法:通过运动训练干预的方法对MetS组及MetS症状组进行为期12周的训练,训练前后分别采集体力健康指标(肺活量、台阶指数、握力)和身体健康指标(身高、体重),采用One-Way ANOVA检验和Welch检验进行差异性检验及事后比较,采用Spearman进行双尾相关性检验,对具有显著性相关指标进行有序logistics回归分析。结果:年龄、肺活量、台阶指数、握力以及体重均对大学女教师代谢综合征(Mets)具有显著性的影响,其中年龄、体重与MetS呈正相关,表现为年龄越大、体重越重,人们患有MetS的概率增加;肺活量和台阶指数与MetS呈负相关,表现为肺活量、台阶指数越低,人们患有MetS的几率增加。结论:大学女教师的年龄、肺活量、台阶指数、握力以及体重这五项指标是影响MetS症状的主要因素,对上述五项指标建立的logistics方程模型,在大学女教师MetS症状的预测方面具有一定的实际应用价值。

基于改进IDI指标体系的G20成员国信息通信技术发展水平研究

在国际电信联盟曾使用的信息通信技术(ICT)发展指数(IDI)基础上,提出改进的信息通信技术发展指数。通过分析2007—2020年二十国集团(G20)的19个成员国的IDI指数和ICT相关指标揭示了G20成员国在信息通信技术发展方面的特点和差异性。分析发现G20成员国信息通信技术发展水平均有较大幅度的提升,国家之间的信息通信技术发展差距逐渐缩小,但增长速度和发展水平仍存在较大差异;G20成员国中韩国、日本、法国、德国和英国的信息通信技术发展水平最高,美国、加拿大、澳大利亚、沙特阿拉伯和俄罗斯的信息通信技术发展居于G20成员国的中上水平,意大利、阿根廷、中国、巴西、土耳其的发展居于中下水平,墨西哥、南非、印度尼西亚和印度的信息通信技术发展水平较低。

疗养效果评定的现状和未来

我院40余年来,对特勤疗养的效果一直缺乏一个简单易行、行之有效的评价标准,疗养效果如何评价是一个比较复杂的问题.1996年总后勤部卫生部颁发的<军队疗养院疗养质量主要评价指标>中总的疗养效果评定分为六个方面,即主观感觉、疾病矫治效果、体力指标、体格检查、心理治疗指标、学会1～2种防病或养生保健方法,其中对特勤健康人群只涉及到主观感觉、体力指标和养生保健三个方面,而这三项又受主观因素影响过大,致使评定结果不够客观和科学.疗养的目的是消除疲劳、恢复战斗力和延长飞行年限,疗养一个月是否达到目的,关键是能否选择几项客观的、无破坏性的、适合在疗养院中开展的评定指标.特勤疗养的一大特点是集体入院,(在1～2天中可能入100～200人),入院检测工作量大,时间短,项目多(必须在1～3天内完成).经过20多天的疗养后经再一次检测,然后做好疗养效果评定,而这些指标又必须尽可能地排除主观因素的影响,从而达到真实有效和科学的结果,为进一步开展有针对性的专项训练打下了基础,使每个飞行人员针对自己的弱项展开训练,在疗养中真正提高体力消除疲劳,达到了疗养的预期目的.

Application of Participatory Monitoring and Evaluation in Development of Animal Husbandry Technology

[Objective] This study aimed to provide references for the application of participatory monitoring and evaluation in the development of animal husbandry tech- nology. [Method] With the livelihood improvement program for agricultural and pas- toral area in northern Yunnan as the example, the development process of partici- patory animal husbandry was overviewed. And the monitoring and evaluation pro- cesses of participatory animal husbandry were introduced and analyzed. [Result] The monitoring and evaluation indicator system of participatory animal husbandry technol- ogy included 4 layers, namely technology, institutional system, personnel ability con- struction and effectiveness, and 11 third-level indicators, namely, technical characteristics, superiority-inferiority comparison, community and farmers, technical personnel, project personnel, economic indicators and social indicators. [Conclusion] This study provided the references for the application of participatory monitoring and evaluation in the development of animal husbandry technology.

Concept and evaluation method of equipment system of systems contribution rate

To scientifically evaluate the equipment system of systems(SoS)contribution rate,a contribution rate calculation method based on a structural equation model(SEM)is proposed in this paper.The connotation and evaluation process of the equipment SoS contribution rate were redefined and standardized.To solve the existing problems in the application of the original contribution rate formula,a modified contribution rate calculation formula is proposed.Finally,the contribution rate evaluation index was divided into latent and explicit variables.The measurement and structural equations in the SEM were used to calculate and analyze the latent variables.The simulation results show that the number of defense lines of air defense weapon equipment has a greater impact on the linear configuration than the group configuration.When the number of K-type air defense weapons is sufficient,the two-layer linear configuration should be adopted with 20 air defense weapon systems.When the number of K-type air defense weapons is insufficient,the single-layer group configuration should be adopted with 12 air defense weapon systems.

Evaluation of Ecological Environment Competitiveness of Hunan Province Based on Prefecture Level Cities

Based on the data of 13 eco-environmental indicators of 14 prefecture level cities in Hunan Province from 2014 to 2018,this paper quantitatively evaluated the eco-environmental competitiveness and its advantages and disadvantages by principal component analysis(PCA).The results showed that:(1)the overall ecoenvironmental competitiveness of Hunan Province was relatively high,whereas the competitiveness level of each city and prefecture was quite different.The comprehensive score of eco-environmental competitiveness of Changsha City was 2.96,ranking the first,and Zhangjiajie city ranking the last with a score of-1.60,which indicated that there was an obvious difference in the level of eco-environmental competitiveness among different regions.(2)The overall eco-environmental competitiveness of cities and prefectures in Western Hunan Province was weak.Among the 14 prefectures and cities in Hunan Province,the comprehensive scores of eco-environmental competitiveness of 6 prefectures and cities were negative,whereas the scores of Zhangjiajie,Xiangxi and Huaihua in Western Hunan were all lower than the others.In the face of increasingly serious environmental problems,cities and prefectures should adjust measures according to local conditions and put forward specific measures to enhance environmental competitiveness.In particular,cities and prefectures in Western Hunan should give full play to their advantages in ecological resources,take the path of green development,enhance the competitiveness of ecological environment,and provide support for local economic development.

Evaluation and Analysis of Provincial Differences in Resources and Environment Carrying Capacity in China

Resources and environment carrying capacity is central to not only regional sustainable development but also major function-oriented zoning. This paper presents an evaluation index system for resources and environment carrying capacity based on four aspects of carrying capacity(i.e., water resources, land resources, the environment, and ecosystems) by using a square deviation decision-making method, and on the basis of above effort evaluates the resources and environment carrying capacity across 31 provincial regions in China(not including Hong Kong, Macao and Taiwan regions of China). In addition, this paper evaluates the current state of socio-economic development, and analyzes the spatial distribution of resources and environment pressure. The results showed that distinct spatial differences in resources and environment carrying capacity and pressure across provincial regions. Resources and environment pressure is affected by both comprehensive resources and environment carrying capacity and socio-economic development. Regions subjected to lower degrees of resources and environment pressure will be restricted by resources and environmental problems through future courses of development owing to excessively low carrying capacities. By contrast, regions with higher comprehensive resources and environment carrying capacity will be subjected to excessively high levels of resources and environment pressure because of rapid socio-economic development. Both of resources and environment carrying capacity and pressure must therefore be considered in the allocation of country-binding targets to provincial regions.

Technical and Economic Index System for CO_2 Emission Reduction in China's Power Industry

The main technic and economic indices for carbon dioxide emission reduction of Chinese electric power industry are designed systematically in this paper.According to quantitative calculation and influential factor analysis on the carbon dioxide emission reduction of the industry from 1978 to 2009,the author estimates and calculates the relevant indices during the 12 th Five-Year Plan period and in 2020.Finally the author analyzes the relationship and difference between the conventional technical and economic indices for electric power planning and the new index system for the low carbon economy development.

GA-SVC model and application of comprehensive evaluation of coal mine essential safety management

In order to evaluate the level of the coal mine essential safety management, the comprehensive index system was designed base on the connotation principle of the mine essential safety management. Due to the disadvantage of index weight setting by subjective idea in the former method, support vector classification algorithm was used to assess the level of coal mine essential safety management. According to the advantages of the global search capability of the genetic algorithm, support vector classification parameters optimization method was proposed based on genetic algorithm, and genetic algorithm-support vector classification model of coal mine essential safety management assessment was established. Learning samples were constructed on the basis of former data of mine essential safety management evaluation. The test results show that the genetic algorithm-support vector classification model has higher evaluation accuracy and good generalization ability, and the advantage of no need for artificial setting of index weight and absence of the subjective factors influence to evaluation results.

Research Methodology for Tourism Destination Resilience and Analysis of Its Spatiotemporal Dynamics in the Post-epidemic Period

As the COVID-19 pandemic continues to spread, the global tourism industry is facing enormous challenges. There is an urgent need to explore an effective path for tourism to recover and revitalize. With the normalization of the epidemic, tourism destinations will pay more attention to the prevention, warning, and coping strategies of the epidemic, and this focus will also be evident in the study of tourism destination resilience in the post-epidemic period. Some studies on the epidemic and the resilience of tourism are currently underway, but few of them are integrated with research on the resilience of tourism destinations in the post-epidemic period, although no systematic research ideas or methods have been found. Based on resilience theory, this paper summarizes the general research ideas and develops an epidemic resilience model suitable for urban tourism destinations. The present study also proposes a set of research methods based on the index system to analyze the resilience and its spatiotemporal dynamic characteristics of tourism destinations in the post-epidemic period. The methodology can be divided into three stages: Firstly, construct the conceptual model and evaluation system for tourism destination resilience;Secondly, select case sites for empirical analysis, measure the resilience of tourism destinations, and analyze the characteristics of spatiotemporal differences and subsequent factors of influence;And finally, establish an adaptive management mechanism for tourism destinations to use in response to the epidemic and in guiding the formulation of post-epidemic recovery policies.

Thermal performance analysis of non-uniform height rectangular fin based on constructal theory and entransy theory

A model of non-uniform height rectangular fin, in which the variation of base's thickness and width are taken into account, is established in this paper. The dimensionless maximum thermal resistance(DMTR) and the dimensionless equivalent thermal resistance(DETR) defined based on the entransy dissipation rate(EDR) are taken as performance evaluation indexes. According to constructal theory, the variations of the two indexes with the geometric parameters of the fin are analyzed by using a finite-volume computational fluid dynamics code, the effects of the fin-material fraction on the two indexes are analyzed. It is found that the two indexes decrease monotonically as the ratio between the front height and the back height of the fin increases subjected to the non-uniform height rectangular fin. When the model is reduced to the uniform height fin, the two indexes increase first and then decrease with increase in the ratio between the height of the fin and the fin space. The fin-material fraction has no effect on the change rule of the two indexes with the ratio between the height of the fin and the fin space. The sensitivity of the DETR to the geometric parameters of the fin is higher than that of the DMTR to the geometric parameters. The results obtained herein can provide some theoretical support for the thermal design of rectangular fins.