Search

Objective To investigate factors related to hypertension and their importance degrees in Kazakhs,from Altay city, Xinjiang Uygur Autonomous Region, with different occupations (citizen, farmer, and nomad) for target hypertension prevention. Methods According to the proportions of three occupation populations, 1 668 Kazakhs aged 30 years or older were selected by random cluster sampling from 2012 to 2013, in Hongdun Town, Altay City, Xinjiang. Hypertension related factors were investigated. We used random forest model to explore the factors related to hypertension and their importance degrees in different occupational groups. Results 1 646 participants were included in this study. We ranked the importance of hypertension related factors by feature importance scores. The top five hypertension related factors were waist circumference,triglycerides (TG), low-density lipoprotein cholesterol (LDL-C), body mass index (BMI), and age for citizen; age, LDL-C, total cholesterol (TC), TG, and waist circumference for farmer. Age, BMI, waist circumference, TC, and LDL-C for nomad (feature importance scores＞0.06). The prediction accuracy of random forest models of hypertension for citizen, farmer, and nomad were 0.82, 0.69, and 0.76, respectively. Conclusions In different occupational groups, obesity and blood lipids were related to hypertension in different degrees, so the target of hypertension prevention should be carried out for different occupational groups. With the process of urbanization, urban residents should be well informed to controlling central obesity.

The methods of multiple scales and approximate potential are used to study pendulums with linear damping and variable length. According to the order of the coefficient of friction compared with that of the slowly varying parameter of length, three different cases are discussed in details. Asymptotic analytical expressions of amplitude, frequency and solution are obtained. The method of approximate potential makes the results effective for large oscillations. A modified multiple scales method is used to get more accurate leading order approximations when the coefficient friction is not small. Comparisons are also made with numerical results to show the efficiency of the present method. [ABSTRACT FROM AUTHOR]

This paper finds that, value added induced by per unit of final demand has decreased in China from 2002 to 2007, by employing non-competitive input-output model capturing processing trade. To explore the reason why it decreased, the paper proposes a modified structural decomposition analysis (SDA) method, considering the characteristic of multi-regional input-output table. By using this method, one not only can decompose the technology coefficients into substitution effect and fabrication effect, but also can evaluate the contribution of each region to the change of dependent variables. The results show that decreasing value-added ratio and change of final demand structure of domestic enterprises' products are the main causes of the decrease. Meanwhile, substitution of foreign invested enterprises' products to imports has inhibited this decline effectively. [ABSTRACT FROM AUTHOR]

This paper proposes a new input-output model, which is called non-competitive input-output model capturing foreign-funded enterprise and trade pattern. The model divides the economy into six parts in view of the great difference in production technology and structure between domestic enterprises and foreign-funded enterprises, and between processing export and non-processing export. The paper also compiled the corresponding table of 2007 for the new model, and estimated the different contribution of domestic enterprises and foreign-funded enterprises to China and the close relationship between them by using the new model. [ABSTRACT FROM AUTHOR]

Forecasting pork consumption is very important to stabilize the pork market. By using Granger causality test to choose significant factors, we forecasted China's pork consumption with ARIMA, VAR and VEC model respectively. Based on a dynamic integration method, we integrated the forecast results of three models above. Finally, empirical results show that the dynamic integration method is more accurate and stable by forecasting China's pork consumption from 2009 to 2011 with the four methods above. [ABSTRACT FROM AUTHOR]

Using the device for ion velocity imaging, the laser frequency is doubling with the wavelength in the region of 492-523 nm, and the laser after frequency doubling was used as the light source. The ion spectrum of methyl iodide parent molecular (CH3 I+) in the range of 76 500-81 120 cm(-1) was obtained by the way of two-photon ionization, with a very high-resolution. The mechanisms of the methyl iodide molecule two-photon ionization were also described, the CH3 I+ spectrum obtained in the experiment was marked based on Rydberg formula and the quantum defect, the split arising from p series, d series and f series levels was also explained, and the spectral assignment showed that the two-photon ionization of methyl iodide molecule can not only be used to observe the reported characteristics of single photon ionization, but also can find some transitions which is forbidden in the single photon ionization, such as f series transitions.