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At present, most of the studies of the stability of the formation-cement sheath-casing combination have been mainly based on the plane, and the three-dimensional model established is only one example. There is no systematic study of the influence of physical parameters and process parameters on the stability of the combined body under the three-dimensional model and the action of triaxial crustal stress. Through the establishment of three-dimensional formation-cement sheath-casing linear elastic combination model, we can study the influence of operational parameters (cement sheath pressure, casing cross section pressure, inner casing pressure, ellipticity of borehole, centrality of casing, thickness of cement sheath) by the two interfaces’ Von Mises stress and the total displacement of the combination body. It is pointed out that the pressure of cement sheath, and casing cross section pressure have no effect on the stability of formation, cement sheath and casing; The higher the ellipticity of the borehole, the eccentricity of the casing (position 1, 2) and the thickness of the cement sheath, the higher the stability of the second interface of the cementing; The higher the inner casing pressure and the eccentricity of the casing(position 3), the lower the stability of the second interface of the cementing; The higher the eccentricity of the casing (position 2,3) and the thickness of the cement sheath, the higher the stability of the first interface of the cementing; The higher the inner casing pressure, the eccentricity of the casing (position 1) and the ellipticity of the borehole, the lower the stability of the first interface of the cementing; The higher the eccentricity of the casing (position 2,3) and thickness of the cement sheath, the higher the stability of the casing; The higher the inner casing pressure, the ellipticity of the borehole and the eccentricity of the casing(position 1), the lower the stability of the casing. Through this study, according to the formation stress, the formation physical parameters (elastic modulus, Poisson's ratio, density), optimize the operational parameters, ensure the long-term integrity of the combination.

Due to the high population density, the environmental accidents would caused the serious social impact and economic loss in China.The chemical parks are the major environmental risk sources. The environmental risk categories are introduced and the corresponding risk prevention measures of chemical industral park to environmental accident are researched in the paper. Moreover, the hazards reduce measures of environmental accidents around the chemical park ,which including the hazardous chemical monitoring, environmental pollution integrated emergency exercise,et al.,are also discussed.

China is suffering from severe environmental accidents that many have catastrophic impacts on public health and the environment. It is urgent to update the standards for environmental accidents prevention in China. This paper analyses the causes of fifty-three major accidents that happened in 2008 to obtain insight to help prevent similar events in the future. The results show that production accidents, which were mainly triggered by process analysis, training and human error, were the dominant causes of environmental accidents in China. In addition, current regulations on the control of environmental accident hazards and their implementation are also presented in this paper, which comprise legal requirements centering on hazardous chemicals, industrial safety evaluation, risk analysis and preparation of emergency plans. Based on our analysis, some key points that should be developed in future environmental accident hazard control measures are put forward with the aim of shedding light on decision making and risk management in China.

Constructing papermaking industry eco-industrial park is a importance way which can solve the dilemma of resource, environment, and economic development from enterprise group hierarchy. By ecological theories of “key specises” and eco-industrial chain, this paper analyses the feasibility of china’s papermaking industry constructing eco-industrial park. By way of case analysis, prove that constructing papermaking industry eco-industrial park is a feasible way of realizing sustainable development of china’s papermaking industry.

Contrasting《Discharge standard of water pollutants for pulp and paper industry》(GB3544-2008) to《Discharge standard of water pollutants for pulp and paper industry》(GB3544-2001), this article educes impact for pulp and paper industry by 《Discharge standard of water pollutants for pulp and paper industry》(GB3544-2008). This article discuss producing technics and dealing with waste water technics of pulp and paper industry, that satisfy GB3544-2008.

1MW variable speed constant frequency wind turbine tower of steel structure is analyzed by using the software ANSYS, the coupling between the wind and the tower is realized through the order coupling method. The maximum Von Mises stress and the deformation of the tower in the case of limit loads are obtained, and then these results are compared with that without wind load. Comparison result shows that the effect of wind load on the tower’s displacement along the wind speed is great, and the maximum Von Mises stress of the tower becomes larger after considering the influence of wind load, the increase extent is determined by wind load case.

BACKGROUND: The safety and health benefits of Tai Chi mind-body exercise has been documented in a large number of clinical studies focused on specific diseases and health conditions. The objective of this systematic review is to more comprehensively summarize the evidence base of clinical studies of Tai Chi for healthcare. METHODS AND FINDINGS: We searched for all types of clinical studies on Tai chi in PubMed, the Cochrane Library and four major Chinese electronic databases from their inception to July 2013. Data were analyzed using SPSS17.0 software. A total of 507 studies published between 1958 and 2013 were identified, including 43 (8.3%) systematic reviews of clinical studies, 255 (50.3%) randomized clinical trials, 90 (17.8%) non-randomized controlled clinical studies, 115 (22.7%) case series and 4 (0.8%) case reports. The top 10 diseases/conditions was hypertension, diabetes, osteoarthritis, osteoporosis or osteopenia, breast cancer, heart failure, chronic obstructive pulmonary disease, coronary heart disease, schizophrenia, and depression. Many healthy participants practiced Tai Chi for the purpose of health promotion or preservation. Yang style Tai Chi was the most popular, and Tai Chi was frequently practiced two to three 1-hour sessions per week for 12 weeks. Tai Chi was used alone in more than half of the studies (58.6%), while in other studies Tai Chi was applied in combination with other therapies including medications, health education and other physical therapies. The majority of studies (94.1%) reported positive effects of Tai Chi, 5.1% studies reported uncertain effects and 0.8% studies reported negative effects. No serious adverse events related to Tai Chi were reported. CONCLUSIONS: The quantity and evidence base of clinical studies on Tai Chi is substantial. However, there is a wide variation in Tai Chi intervention studied and the reporting of Tai Chi intervention needs to be improved. Further well-designed and reported studies are recommended to confirm the effects of Tai Chi for the frequently reported diseases/conditions.

Xa-25 was a bacterial blight resistance gene identified in a somaclonal mutant HX-3. A doubled-haploid (DH) population including 129 stable lines was derived from anther culture of a typical japanica 02428 and a typical indica HX-3 cross. The bacterial blight strain Zhe173, a typical bacterial blight strain in Yangtze River valley, was used to test the resistance or susceptible of the DH population lines, and the results showed that the resistance lines and susceptible lines were 62 and 67, respectively. A total of 300 SSR primer pairs covering 12 rice chromosomes were used for polymorphism survey of 02428 and HX-3. Among these primers, 74 showed polymorphism between the parents. Using these polymorphic SSR markers, bulked segregant analysis was conducted on the DH population. As the result, Xa-25 was located at the terminal region of the long arm of chromosome 4 between the two SSR markers RM6748 and RM1153, the map distance between Xa-25 and the two SSR markers was 9.3 cM and 3.0 cM, respectively.

To study in vitro dissolution rate of geniposide in Huangqin Qingfei dispersible tablet.A reversed-phase HPLC method was developed for determination of geniposide. In vitro dissolution rates were compared between Huangqin Qingfei dispersible tablet and conventional tablet in the dissolution medium of pH 1.0, 2.85, 4.5, 6.8, and 8.0 accordingly. Zero-class model, single-index model, logarithm normal school model, and Weibull distributing model were used to simulate the dissolution curve.The dissolution rate of two tablets is not affected by pH so much, and they can dissolve within 5 to 10 minutes. Weibull distributing model is the best simulation for in vitro dissolution. Comparing with conventional tablet, dispersible tablet dissolve quickly and completely.The in vitro dissolution rate of geniposide in Huangqin Qingfei dispersible tablet conforms to Weibull distributing model. The dispersible tablet is able to release rapidly.