Precipitation data from 30 stations in the Huaihe River basin (HRB), a climatic transitional zone in east China, were used to investigate the spatiotemporal variability and trends of extreme precipitation on multitimescales for the period 1961–2010. Results indicated that (1) the spatial pattern of the annual precipitation, rainy days, extreme precipitation, and maximum daily precipitations shows a clear transitional change from the south (high) to the north (low) in the HR; it confirmed the conclusion that the HRB is located in the transitional zone of the 800 mm precipitation contour in China, where the 800 mm precipitation contour is considered as the geographical boundary of the south and the north. (2) Higher value of the extreme precipitation intensity mainly occurs in the middle of the east and the central part of the basin; it reveals a relatively distinct west-east spatial disparity, and this is not in line with the spatial pattern of the extreme precipitation total, the sum of the precipitation in 95th precipitation days. (3) Annual precipitation of 22 stations exhibits increasing trend, and these 22 stations are located from the central to the northern part. There is no significant trend detected for the seasonal precipitation. The summer precipitation exhibits a larger change range; this might cause the variation of the flood and drought in the HBR. However, the increasing trend in winter precipitation may be beneficial to the relief of winter agricultural drought. Rainy days in 12 stations, mostly located in and around the central northeastern part, experienced significant decreasing trend. Extreme precipitation days and precipitation intensity have increasing trends, but no station with significant change trend is detected for the maximum precipitation of the basin. (4) The spatiotemporal variability in the HRB is mainly caused by the geographic differences and is largely influenced by the interdecadal variations of East Asian Summer Monsoon in eastern China. The output of this paper could provide references for the practical decision making and integrated basin management of Huaihe River basin.
Abstract-The comprehensive policy of two children is implemented nationwide. This policy will bring concrete benefits to china's economic development, aging population, and keeping long-haul balanced population. While emphasizing the positive of the two children policy, we should also see the problems caused by the policy, especially the real receiver of the two-child policywomen. One of the most important issues is the plight of women's fertility and employment. This paper analyzes the three core problems of gender discrimination, difficulty of promotion and professional disruption crisis in employment, and puts forward the measures from the system, society to enterprises, and effectively solves the problem of childbearing dilemma of professional women. These measures include perfecting existing system and protecting the rights of women; transferring traditional view; making reasonable allocation of public resources; etc.
The correctness of the business process modelling notation (BPMN) is essential for software success, and the BPMN formalization is the foundation of the correctness verification process. However, dynamically adapting the formalized BPMN model to changes in the BPMN model and protecting tokens from being lost in the remapping formalization are the main limitations of the BPMN formalization under changing business requirements. To overcome these limitations, an approach for evolving a Petri nets model according to the BPMN changes is proposed in this paper. In this approach, a check algorithm is designed to identify the differences between the original BPMN model and the updated BPMN model. Then, the evolution rules of the extended Petri nets (EPN) model are defined according to the results of the checking program. Finally, these evolution rules are described in the query/view/transformation operational mapping (QVTo) language and implemented in the Eclipse platform. We demonstrate the effectiveness of the evolution of the BPMN formalization using a case study of the Web Payment business system. Moreover, the dynamic evolution of the BPMN formalization can maintain the consistency between the original model and the updated model, and this consistency has been successfully verified.
Along with our country's social and economic construction, the new generation of migrant workers has become an indispensable backbone. In order to reduce the risk of old age migrant workers and reduce their worries, we need to implement resolutely the policy of their pension insurance. However, there are still many contradictory issues in China's new generation of migrant workers' pension insurance such as low participation rate, high rate of surrender, contradiction between low-income and high payment of pension insurance, high liquidity and transfer continuity. The contradiction between the neogeneration workers' own rights and company's interests. The reason comes from migrants own, company, and government. The measures to solve the problem of the migrant workers' pension insurance include reducing the insurance base appropriately, promoting the continuity o f pension insurance, increasing the supervision and guidance of employers.
In the article titled "Spatiotemporal Variability and Trends of Extreme Precipitation in the Huaihe River Basin, a Climatic Transitional Zone in East China" [1], the name of the first author was given incorrectly as Zhengwe Ye. The author's name should have been written as Zhengwei Ye. The revised authors' list is shown above.
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