鞍钢冷轧厂LZ--CIMS经营决策支持系统的实现

进入90 年代，随着计算机硬件技术和网络技术的巨大进步，数据仓库( DW) ，联机分析处理( OLAP) ，数据挖掘技术应运而生。三者的结合构成了DSS 的新框架，使传统DSS 从根本上摆脱了技术上的困境，为它的发展带来了一线生机。本论文的课题背景是国家863/CIMS 鞍钢冷轧厂示范工程中经营决策子系统，目的建造一个实用的DSS 系统，辅助领导决策。具体内容包括综合信息查询、辅助决策两个部分:.综合信息查询它是辅助决策的信息、基础。我们将DW 与OLAP 的思想运用到此部分的实施中，构造了虚拟数据仓库机制，实现对数据库面向主题的多维、多粒度的查询与分析，此外还提供了一种随意查询方式，作为对虚拟数据仓库机制的补充，以满足决策者对新信息的需求。•辅助决策实现对产品结构的优化和产品质量评估两方面的辅助决策。产品结构优化的实施中，采用线性规划的方法，并将面向对象的思想用于模型的建造和实现中;产品质量评估是构造一个专家系统，找出产生废品的原因.实施中，以产生式规则作为知识的表达方式，采用反向推理作为主要的推理手段。本DSS 的实现利用了DW十OLAP十DM 的新框架的部分思想，为新框架走向实用化、成熟化做了一定的尝试和探索。

CIMS中EIS的应用与研究

CIMS : Commercial Information Management System.

Mode of access: Internet.

Formic acid mixing ratio (CIMS) and 3D wind data, plus SOSAA model runs -- Hyytiälä, Finland, Apr-Jun 2014

These are data of eddy covariance flux measurements of formic acid (HCOOH), performed by a chemical ionization mass spectrometer (CIMS) over a boreal forest canopy in Hyytiälä, Finland, in spring/summer 2014. Results from the 1-D chemical transport model runs using SOSAA (Simulate Organic vapours, Sulphuric Acid and Aerosols) are included as well. The data accompany a submission of a manuscript to Geophysical Research Letters for consideration for publication (Schobesberger et al.).

Automated support for versioning compliance checking between workflow management and product lifecycle management (in Chinese)

With the development of enterprise informatisation, Product Lifecycle Management (PLM) systems have been widely deployed and applied in enterprises. This paper analyzes the requirement that conducting version operations on business objects as specified in process models should be compliant with the versioning policies imposed by product lifecycles. This leads to the introduction of the concept of versioning compliance, and the approach of compliance checking that we proposed in our earlier work, which comprises both syntactical compatibility and behavioural compatibility checking. The paper then focuses on the tool implementation for providing automated support to the versioning compliance checking. An empirical evaluation of the tool was also performed with industrial partners using the well-known questionnaire-based method. The evaluation and feedback from practitioners further evidence the practical significance of this research question in the PLM field and demonstrate that the proposed solution with its automated tool support possesses a high application potential.

集成化柔性激光加工系统的误差检测及其补偿

基于集成化柔性激光加工系统的特殊框架结构和为满足测量及加工精度要求，针对加工系统的整个框架和机器人腕部分别建立了相应的误差补偿几何模型。利用三维激光跟踪干涉仪对激光加工系统进行了检测，并根据检测结果结合相对应的补偿模型对系统进行了实时软件误差补偿。测量和加工试验及干涉仪的检测结果显示所建误差补偿模型合理，系统满足测量和激光加工的精度要求。

Chemistry of secondary organic aerosol

The photooxidation of volatile organic compounds (VOCs) in the atmosphere can lead to the formation of secondary organic aerosol (SOA), a major component of fine particulate matter. Improvements to air quality require insight into the many reactive intermediates that lead to SOA formation, of which only a small fraction have been measured at the molecular level. This thesis describes the chemistry of secondary organic aerosol (SOA) formation from several atmospherically relevant hydrocarbon precursors. Photooxidation experiments of methoxyphenol and phenolic compounds and C₁₂ alkanes were conducted in the Caltech Environmental Chamber. These experiments include the first photooxidation studies of these precursors run under sufficiently low NO_x levels, such that RO₂ + HO₂ chemistry dominates, an important chemical regime in the atmosphere. Using online Chemical Ionization Mass Spectrometery (CIMS), key gas-phase intermediates that lead to SOA formation in these systems were identified. With complementary particle-phase analyses, chemical mechanisms elucidating the SOA formation from these compounds are proposed.

Three methoxyphenol species (phenol, guaiacol, and syringol) were studied to model potential photooxidation schemes of biomass burning intermediates. SOA yields (ratio of mass of SOA formed to mass of primary organic reacted) exceeding 25% are observed. Aerosol growth is rapid and linear with the organic conversion, consistent with the formation of essentially non-volatile products. Gas and aerosol-phase oxidation products from the guaiacol system show that the chemical mechanism consists of highly oxidized aromatic species in the particle phase. Syringol SOA yields are lower than that of phenol and guaiacol, likely due to unique chemistry dependent on methoxy group position.

The photooxidation of several C₁₂ alkanes of varying structure n-dodecane, 2-methylundecane, cyclododecane, and hexylcyclohexane) were run under extended OH exposure to investigate the effect of molecular structure on SOA yields and photochemical aging. Peroxyhemiacetal formation from the reactions of several multifunctional hydroperoxides and aldehyde intermediates was found to be central to organic growth in all systems, and SOA yields increased with cyclic character of the starting hydrocarbon. All of these studies provide direction for future experiments and modeling in order to lessen outstanding discrepancies between predicted and measured SOA.