Problems of Production Management in Agile Manufacturing Environment and their Countermeasures

Agile manufacturing is a new production mode. This pa per discusses the four problems of production management in the environment of a gile manufacturing, and some countermeasures are advanced: (1) Organization of production. Traditional MTO production or MTS production ca n not meet the requirement of agile manufacturing which request both high produc tivity and the manufacturing flexibility. For this, the paper advances best way is to use the production organization mode of MCP (Mass Customization Pro...     

Occupational Health and Safety Systems,Corporate Governance and Viable Systems Diagnosis: An Action Research Approach

This paper establishes a theoretical basis for the implementation of governance systems in Occupational Health and Safety (OHS). This arose when a complex government organization reviewed the usage of its OHS computer system. This review precipitated several cycles of Action Research (AR). The AR allowed the recognition that the organization needed to define its OHS strategy, clarify its commitment to OHS, and examine its OHS systems in order to provide an effective OHS management and corporate governance system. As part of the review, a Viable Systems Diagnosis was done on the OHS function. It was recognized that Stafford Beer provided valuable insights into the information needs and communication flows of OHS information throughout this complex organization. Action research appears to be a particularly useful method for examining and implementing OHS management systems.     

频率的测量在单片机设计中的应用

用单片机设计系统时,常常涉及到对频率进行测量,当被测频率较低时我们采用计数法,被测频率较高时我们采用周期法。     

白玉菇液体培养状况的测定

为了对白玉菇液体培养终点进行测定,本论文主要采用培养过程中的菌丝球数量、p H、还原糖和菌丝干重等指标,对白玉菇液体培养的终点进行测定。结果表明,当培养液的p H为5.38,还原糖含量是3.87时,菌丝球的数量与活性最高,并且菌丝得率最高,此时也是白玉菇液体培养的终点,相比较于固体原种的培养周期缩短了5~10 d。     

非晶快离子导体AgI-Ag_4P_2O_7中银沉积的电子探针研究

用电子探针显微分析法,研究了AgI-Ag_4P_2O_7非晶态快离子导体中的银沉积问题。给出了在电子束轰击下银计数率随时间变化曲线。开始时银沉积率随时间而增加较快,然后变得缓慢,最后趋于一个极限值。对于晶化后的样品,由于晶界的阻碍作用,向轰击区迁移的Ag~ 离子减少,离子源枯竭快,银计数率达到极限值比未晶化前快。文中同时给出了电子束轰击区的二次电子像、背射电子像。AgLαX-射线扫描像。在银沉积过程中,发现在电子束轰击区周围伴生有枝叶状的脉纹似的析出物,是由于电子束轰击样品产生温升而导致玻璃中银和银的化合物析晶所致。     

基于融合技术的棒材定支数图像识别

棒材成捆时的定支数包装是个一直没有得到很好解决的问题,为此文章提出了一种基于融合技术的图像识别方案。该方案首先用CCD采集棒材定支包装时的端面图像,然后用阈值化和基于边界的方法对图像进行初始分割,最后进行融合、去粘连及计数。实验结果表明该方案有利于计数准确性的提高。     

苎麻纱的毛羽分析

本文作者对苎麻细纱的毛羽特性进行了研究。对纤维细度,纺纱支数、细纱捻度、变性苎麻纤维与细纱毛羽的关系亦进行了分析,得出如下结论: 1.纤维细度对细纱毛羽有明显影响。纤维支数愈高,毛羽愈少。 2.纺纱支数对毛羽的数量有一定影响。支数愈高,毛羽量愈少。 3.提出了细纱捻度与毛羽的回归方程。 4.变性苎麻纤维对细纱毛羽有明显影响。 5.提出了S_0=KN_1L_1d_0是衡量苎麻纱毛羽的一个重要指标。     

Population biology of figs: Applications for conservation

Summary The flowering phenology typical of at least monoecious figs-intra-tree synchrony and inter-tree asynchrony-poses problems for persistence of the pollinator population, and hence of the fig population itself, when fig population size is small. Establishment and maintenance of a population of the short-lived, species-specific wasp pollinator require that the fig population include a critical minimum number of trees (critical population size: CPS). Below CPS, temporal gaps between flowering trees occur that are unbridgeable by the pollinator, leading to its local extinction. This has implications for conservation in two contexts: human-aided invasions of introduced fig/wasp pairs, in which initial populations of figs and/or wasps may be small, and the persistence of figs and wasps in fragmented forest, in which initially large populations may be drastically reduced. Long-distance range extension by fig/wasp pairs is problematical for two reasons: 1) the fig species must first attain CPS, most likely through repeated seed dispersal events, before the wasp can establish; and 2) long-distance transit should be difficult for the tiny, short-lived wasp pollinators. I review the biology of natural and human-aided range extension by figs and fig wasps, and show that in human-aided range extensions these two difficult steps are circumvented. Once introduced into an area where hosts are abundant, fig wasps should readily establish from a small number of initial colonists, since they mate before dispersal and are highly tolerant of inbreeding. They are thus less subject than many insects to the genetic and demographic hazards of small population size. Of 5–6 fig/wasp pairs that have performed human-aided long-distance range extensions, one Asian pair,Ficus microcarpa and its pollinatorParapristina verticillata, is established in numerous areas in the northern neotropics, and the plant may become a serious weed. In tropical forests, figs may provide keystone resources for frugivores, providing fruit during seasons when other resources are scarce. Figs pose difficult problems for conservation biology, since minimum viable populations appear to be large, and since many species of tropical rainforests occur at low densities. This means that minimum areas required for persistence of a fig population- and for those of other species that would be affected were figs to be removed from the system-may often be large.     

基于改进的可行系统模型的特殊环境下隧道修复施工过程的安全管理研究

本研究分析了我国在役运营隧道病害突显、维修不断的现状,为解决复杂环境下隧道修复施工的安全管理,运用改进的可行系统模型(VSM),针对重庆市某高速公路某隧道的修复施工建立了考虑环境风险的动态安全管理优化模型.结论表明:通过增强环境的调控功能,实现实时动态的施工安全管理模式,可以有效避免因环境变化导致的安全事故,所建模型为复杂环境下的隧道修复施工提供了一种新的管理模式.     

风险矩阵法在校园网络系统风险评估中的应用

针对日益严重的校园网络系统安全问题,基于对某高校校园网络系统风险及其影响因素的分析,提出了运用风险矩阵法对校园网络系统七大风险要素进行评价,并构建了应用于校园网络系统风险评估的风险矩阵,设计了利用风险矩阵进行风险评估的基本流程.结果表明,该评估方法的决策过程规范可行,能较好地综合了群体的意见,增加了评估结果的客观性.