可重构流程模型驱动和组件化的MES流程进化

为使制造执行系统流程能够始终与用户业务流程保持一致,提出一种基于可重构流程模型和组件技术的流程进化实施方法。对业务流程可变性进行分析,建立了可重构流程模型,并对其可重构性进行了说明。定义了组件模型,使流程模型能以组件的形式封装和部署。给出了流程模型分析算法与流程组件调整算法,通过流程模型在重构前后发生的变化驱动流程组件进行重构,完成对系统流程的进化。结合某航天企业的开发实施验证了该方法的可行性。

支持业务流程进化的工作流技术研究

首先分析了现有信息系统的特点和手工处理工作流程的不足 ,指出现有信息系统的柔性较差 ,阐述了工作流系统实施的必然趋势。然后分析了工作流的研究现状 ,并提出工作流系统所必须具备的基本功能 ,按客户机 /服务器结构对这些功能分类 ,给出了一种按三层客户机 /服务器模式实现工作流的软件框架。最后是结论和进一步工作的展望。

A State-of-the-Art Review of Mixing in Microfluidic Mixers

Microreaction technology is one of the most innovative and rapid developing fields in chemical engineering, synthesis and process technology. Many expectations toward enhanced product selectivity, yield and purity, improved safety, and access to new products and processes are directed to the microreaction technology. Microfluidic mixer is the most important component in microfluidic devices. Based on various principles, active and passive micromixers have been designed and investigated. This review is focused on the recent developments in microfluidic mixers. An overview of the flow phenomena and mixing characteristics in active and passive micromixers is presented, including the types of physical phenomena and their utilization in micromixers. Due to the simple fabrication technology and the easy implementation in a complex microfluidic system, T-micromixer is highlighted as an example to illustrate the effect of design and operating parameters on mixing efficiency and fuid flow inside microfluidic mixers.

Escaping Low-Level Equilibrium of Urbanization——Institutional Promotion,Social Interaction and Labor Migration

The policies resulting in urban-rural segmentation have not only directly impeded the transfer of labor from rural to urban areas,but also trapped the process of urbanization in a low-level equilibrium,as the negative effects are amplified by interdependencies between interpersonal decisions.This paper finds from the CHIPS2002 data that there is interdependence of rural residents' decision-making on labor migration from rural to urban areas,and the interdependence is strengthened by the exchange of information between rural residents.According to the simulation results of the models in this paper,China's rural-urban labor migration is indeed at a low-level equilibrium.To get rid of the low-level equilibrium,in addition to improving the level of education and promotion of information exchange among rural residents,it is more important to implement "big push " policies to eliminate institutional barriers to labor mobility and accelerate urbanization with the social interaction.

Investigation of the problems about Left behind Children in the New Rural Construction —— Henan Province as the example

Henan province is the province that promotes the progress of industrialization and urbanization faster. Along with the flow of rural surplus labor, on the one hand, it formed the large group of migrant children in cities and towns; on the other hand, the ideological and moral problem of the ＂Left-behind children＂ grows increasingly. It not only concerns the happiness of family and the social harmony and stability, but also concerns the quality level of new rural population and labor force in the future.

Present situation and improving measures of Chinese Construction Engineering Management informatization

Building engineering management is a huge and complex work, which the key to ensure the quality ofconstruction projects. With the rapid development of the domestic construction industry, the traditional engineering management model can not meet the needs of a large number of construction project information exchanges. Only realizing informationization of construction engineering management, can reduce the cost of construction projects, improve the efficiency of project management and construction progress. This paper analyzes the current situation of construction management informatization, and puts forward some suggestions to strengthen the construction management information construction.

Internal Structure Visualization of Flow and Flame by Process Tomography and PLIF Data Fusion

To address the increasing demands on pollution control and energy saving, the study of low-emission and high-efficiency burners has been emphasized worldwide. Swirl-induced environmental burners(EV-burners), have notable features aligned with these requirements. In this study, an EV burner is investigated by both an ECT system and an OH-PLIF system. The aim is to detect the structure of a flame and obtain more information about the combustion process in an EV burner. 3D ECT sensitivity maps are generated for the measurement and OH-PLIF images are acquired in the same combustion zone as for the ECT measurements. The experimental images of a flame by ECT are in good agreement with the OH radical distribution pictures captured by OH-PLIF, which provide a mutual verification of the visualization method.

Uniformity in premating reproductive isolation along an intraspecific cline

Premating reproductive isolation （RI） may reduce gene flow across populations that have differentiated in traits important for mate choice. Examining RI across genetic and phenotypic clines can inform the fundamental evolutionary processes that underlie population and lineage differentiation. We conducted female mate-choice studies across an intraspecific red-eyed treefrog cline in Costa Rica and Panama with 2 specific aims： （1） to characterize RI across the cline and examine the relationship between premating RI and genetic and phenotypic distance and （2） to evaluate our results within a broader evolutionary and taxonomic perspective through examination of other RI studies. We found that female red-eyed treefrogs prefer local males relative to non-local males, indicating that some premating RI has evolved in this system, but that preference strength is not associated with phenotypic or geographic distance. Our analysis of 65 other studies revealed no clear pattern between the strength of RI and geographic distribution （allopatry, parapatry, cline） or phenotypic distance, but revealed extreme variation and overlap in levels of intra- and interspecific levels of RI. This work contributes to a growing body of literature that examines intraspecific RI across a cline to understand the selective processes that shape evolutionary patterns at the earliest stages of divergence.