裂解气压缩机运行状况分析

就裂解气压缩机C—300在高负荷下运行存在的问题,如:压缩机各段压力超高、透平轴位移大的原因进行分析,进而提出缓解这些问题的措施,以确保C—300安稳长满优运行。

Effect of nutritional supplement combined with exercise intervention on sarcopenia in the elderly:A meta-analysis

Objectives:This systematic review was conducted to explore whether nutritional supplement can improve the benefits of exercise intervention on sarcopenia in the elderly.Methods:Databases,including PubMed,Embase,Cochrane Library,Web of Science,CINAHL,CBM,CNKI,WANFANG,and VIP,were searched.All related papers with randomized controlled trials(RCT)meth-odology that were included in the databases from inception to 19 July 2016 were selected for the study.The tool"assessing risk of bias"from Cochrane Handbook 5.10 was used to evaluate the quality of included papers.A meta-analysis of eligible studies was performed using Stata12.0.Data that we were unable to convene or merge were subjected to descriptive analysis.Results:Six trials were included in our study,which included 429 elderly patients with sarcopenia.The overall methodological quality of the trials was moderate.Compared with the exercise group,patients who were given nutritional supplements gained a bigger boost in fat-free mass(standard mean differ-ence(SMD)=5.78,95%CI:5.17 to 6.40,P=0.000)and muscle mass(SMD=2.048,95%CI:0.907 to 3.189,P=0.000),as well as showed enhancement of keen extension strength(SMD=1.08,95%CI:0.71 to 1.45,P=0.000)and usual walk speed(SMD=0.570,95%CI:0.19 to 0.95,P=0.003).Conclusion:Nutritional supplementation may magnify the effect of exercise intervention on sarcopenia elderly in terms of muscle mass,muscle strength,and physical performance.Inconsistencies were pre-sent among research studies.More robust studies are needed to determine the most suitable type of nutrient and target population and to explore the actual role of combined intervention in managing sarcopenia in the elderly.

Prevalence and correlates of lifestyle behavior,anxiety and depression in Chinese college freshman:A cross-sectional survey

Objectives:First-year college students had exposure to unhealthy lifestyle behaviors that correlate with a high prevalence of anxiety and depression.Regarding to the modifiable lifestyle behaviors factors,this study investigated the prevalence and correlation of multiple lifestyle behaviors,anxiety and depression in a sample of Chinese first-year college students.Methods:Cross-sectional data were extracted from Residents eHealth app of health lifestyle behaviors survey from September to October 2019.Anxiety,depression,eating regular meals,consumption of snacks in-between meals,consumption of fruit,dessert and sugar-sweetened beverages,smoking and secondhand smoke exposure,consuming alcohol,physical activity,sedentary time were assessed by self-report.Socio-demographic including age,gender,education,family income,religion,and health condition were captured.Logistic regression was used to explore the association of multiple lifestyle behaviors,anxiety and depression.Results:Totally 1,017 participants were included in the study.The prevalence of anxiety and depression(from mild to severe) were 40.3% and 45.3%,respectively.In multivariable analyses,religion (believe in Buddhism,OR =2.438,95%CI:1.097-5.421;believe in Christian,OR =5.886,95%CI:1.604-21.597),gender (Female,OR =1.405,95%CI:1.001-1.971),secondhand smoke exposure (OR =1.089,95%CI:1.001-1.184),and eating regular meals (OR =0.513,95%C1:0.346-0.759) were associated with anxiety.Family income (OR =0.732,95%CI:0.596-0.898),eating regular meals (OR =0.641,95%CI:0.415-0.990),frequency of breakfast (OR =0.813,95%CI:0.690-0.959),with a chronic disease (OR =1.902,95%CI:1.335-2.712),and consumption of nocturnal snack (OR =1.337,95%CI:1.108-1.612) were associated with depression.Conclusions:These results highlighted the need for early lifestyle behavior intervention,especially modifying diet patterns considering the background of religion,health condition,and social-economic status in first-year college students to improve their mental health.

Traffic simulation and forecasting system in Beijing

Transport system is a time-varying, huge and complex system. In order to have the traffic management department make pre-appropriate traffic management measures to adjust the traffic management control program, and release travel information to travelers, to provide optimal path options to ensure that the transport system operates efficiently and safely, we have to monitor the changing of the state of road traffic and to accurately evaluate the state of the traffic, then to predict the future state of traffic. This paper represents the construction of the road traffic flow simulation including the logical structure and the physical structure, and introduces the system functions of forecasting system in Beijing.

Problems ,and improvement strategies in foundation work of college accounting

The current accounting system has no longer suited to the development of colleges and university. On the basis of analyzing the crux of the accounting system, we propose solutions to make college financial work more truly reflect the financial condition and fund utilizing situation. With the development of social economy and changes in the market system, university has entered a period of extraordinary development. According to the needs of universities development, university accounting system has also undergone a series of changes. From the accounting method to account setup and expenditures structure, it has made a series of adjustment, to a certain extent reflecting the funding operations of the university. But because accounting basis, accounting method, setup of accounting statement and other items are not suited to financial management needs of universities, some accounting treatments and statements reflecting can＇ t be a true reflection of the funding operations of universities and financial position.