筒子纱及散纤维染色小样机和中样机的选用

小样机是染色中决定放样符合率的关键因素之一。文中分析了各类型小样机的性能特点,讨论了其对不同种类染料的适应性,对纱线、散纤维等染色小样打样的适应性,以及中样机对于筒子染色中的配套性等相关问题。

Research on Mechanism of Diversified Investment and Financing in Building Ecological Cities

Ecological city is the advanced mode of harmonious development of city. Constant improvement is being made in the development of ecological city. However, building ecological city is an enormous project that calls for a huge amount of capital. The government fund is far from adequate. This paper probes into the fund issue and discusses in detail the mechanism of investment and financing in building ecological city from various aspects such as diversification of the investment subjects and the modes of financing.

Characteristics analysis of a novel centralized-driving flip-flow screen

During screening operation, blinding or clogging of screen perforations generally occurs to reduce the sieving capacity and efficiency. Recently, the flip-flow screening has been widely recognized as a feasible method to deal with the problem. In this paper, a novel centralized-driving flip-flow screen(CFS) was developed for the separation of fine and moist coal, and the key structures, namely, a centralized-driving mechanism and a quasi-circle beam mounted with the mat were designed for high reliability and stability. By means of a test on an experimental prototype, the effect of some factors, i.e., initial stretch and hardness of the polyurethane panel, respectively, and the rotation speed of the driving motor on the kinematic characteristic of the screen surface was investigated. Results show that without an initial stretch, the sieve mat generates the largest vibratory amplitude while the slacker the sieve mat initially is, the smaller amplitude it will accomplish. And an increase in the rotation speed could cause a rise in the vibratory amplitude. Unlike the two factors, the hardness does not have a definite effect on the kinematic performance, on which a further study is required. Finally, screening processing on a laboratory prototype was conducted to draw the conclusion that the developed CFS also has a high sieving efficiency for the fine and moist coal.

Subclinical atherosclerosis in northern and southern China： the Chinese paradox

Background The incidence of coronary heart disease （CHD） is higher in Northern than that in Southern China, however differences in traditional CHD risk factors do not fully explain this. No study has examined the differences in subclinical atherosclerosis that may help explain the differences in incidence. This study examined these differences in subclinical atherosclerosis using coronary computed tomography （CT） for calcification between the Northern and Southern China. Methods We selected a random sample of participants in a large multi-center ongoing epidemiologic study for coronary calcium scanning in one northern city （North） （Beijing, n = 49） and in two southern cities （South） （Shanghai, n = 50, and Guangzhou, n = 50）. Participants from the three field centers （mean age 67 years） underwent coronary risk factor evaluation and cardiac CT scanning for coronary calcium measurement using the Multi-Ethnic Study of Atherosclerosis scanning protocol. Results Adjusted log-transformed coronary artery calcium score in North China （Beijing） was 3.1 ±0.4 and in South China （Shanghai and Guangzhou） was 2.2 ＋_ 0.3 （P = 0.04）. Mean calcium score for the northern city of Beijing was three times higher than that of the southern city of Guangzhou （P = 0.01） and 2.5 times higher than for the southern city of Shanghai （P = 0.03）. Conclusions The extent of subclinical atherosclerosis is significantly higher in the northern city of Beijing than that in the two southern cities of Guangzhou and Shanghai, even after adjusting for standard cardiac risk factors. This finding suggests that standard risk factors do not fully explain north south differences in clinical CHD incidence.

Research on the Gender and Age Differences of Middle School Students＇ Shame Sense

In order to ensure the existence of the gender and age differences of middle school students＇ shame, 1258 Shanghai middle school students are surveyed with the help of the Middle school students＇ shame measurement scale with the combination of delaminating and random sampling. The results of questionnaire show that there are significant gender differences in middle school students＇ shame and the average scores of male students＇ shame are higher than those of female students. Besides, there does exist significant age differences in middle school students＇ shame, but it is not simple linear relationship between the feeling of shame and ages. The feeling of shame reaches maximum at the age of 14 and intervention should be given at this age, which young students feel sensitive most. It is suggested that collective remission of the shame should be offered to middle school students with the methods such as physical exercises, persuasion etc.

Study on conditions of internally carried air-launched launch vehicles based on the virtual prototype technology

A method based on the virtual prototype technology simulating the separation of a launch vehicle from its aircraft in the aircraft wake was proposed based on the internally carried air-launched launch vehicle program.In this method,the full-scale model of the aircraft,the vehicle and the parachute are constructed.Then,they are imported into the ADAMS software,constraint solutions and driving forces are then added for visual dynamic simulation.The unsteady aerodynamic forces of the vehicle in the aircraft wake are calculated by CFD and the moving grid technique.The forces generated by the parachute can be derived from the Kirchhoff motion equation.Through comparing and analyzing the simulation results under different launch conditions,it has been proven that this method simulates the separation of a launch vehicle from the aircraft in the aircraft wake accurately.It provides the foundation for the aggregate project of internally carried air-launch vehicles,and offers a new referenced method for multi-body dynamic simulation.

CSNS Magnet System and Prototypes Fabrication

The 1.6GeV synchrotron of China Spallation Neutron Source(CSNS)project is a Rapid Cycling Synchrotron (RCS),which accelerates a high-intensity proton beam from 80MeV to 1.6GeV at a repetition rate of 25Hz.The RCS magnet system consists of 24 dipole magnets(main dipoles),48 quadrupole magnets(main quadrupoles),16 sextupole magnets,some tune shift quadrupoles and corrector magnets.All the magnets are of large aperture for a high beam power of 0.1MW,one design issue is the fringe field at pole end.And the main dipoles and main quadrupoles work at 25Hz repetition rate,the eddy current is an additional issue.In this paper the magnet design of the two kinds of main magnets will be described.

Estimation for Jump-diffusion Term Structure of Interest Rate for China Government Bond Market

This paper examines the term structure of interest rate empirically, and discovers that jump-diffusion process is better than pure diffusion process when describing the stochastic behavior of interest rate, which including jump risk. Using two-stage method to estimate the term structure of China government bond market. Fitting the initial term structure with B-spline approximation method, and then as input to jump-diffusion model parameter estimation. The result accounts for that term structure with jump can explain the actual conditions of China government bond market.

Designing and implementing multicenter clinical randomized controlled trials on moxibustion with large samples

Implementing clinical trials with large multicenter samples is an important way to scientifically evaluate and demonstrate the curative effect of moxibustion.At present,clinical trials on moxibustion with large multicenter samples are prospering in China.It is necessary for research units to have good research professionals and technical platforms as well as a highly standardized and scientifically feasible methodology of research.Taking tasks in the ongoing national 973 project and in the sci-tech support program of the "11th 5-year plan",for example,this research captures the characteristics of moxibustion,carries out deep analysis and introduces specific methods and the important significance of clinical research tasks on moxibustion in designing multicenter plans,implementing experiments,supervising quality and strengthening compliance.