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大兴纱厂股票及商标式样
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作者 严雯 《档案天地》 2019年第6期2-2,共1页
大兴纱厂,即大兴纺织股份有限公司,1921年由武汉楚兴公司投资二百一十万两白银创建。厂址在原直隶省获鹿县京汉铁路东侧的休门村南,占地百亩。1922年10月投产,所产的'双福'棉纱和'山鹿'牌细布曾畅销华北、东北,属河北... 大兴纱厂,即大兴纺织股份有限公司,1921年由武汉楚兴公司投资二百一十万两白银创建。厂址在原直隶省获鹿县京汉铁路东侧的休门村南,占地百亩。1922年10月投产,所产的'双福'棉纱和'山鹿'牌细布曾畅销华北、东北,属河北第一家大型纺纱工业企业,也是近代河北民族工业大规模崛起的主要标志。从1923年到1931年八年中,大兴纱厂共获利四百六十五万余两。 展开更多
关键词 纺织 获鹿县 直隶省 山鹿 工业 式样 纱厂 河北
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Feedback Control for Ecosystem Management:The Case of Wolf-Elk-Hunting Dynamics in the US Mountain West 被引量:1
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作者 Kevin MACKSAMIE Jeffrey WAGNER Juan C.COCKBURN 《Journal of Mountain Science》 SCIE CSCD 2014年第4期850-865,共16页
The purpose of this paper is to explore the promise of utilizing some relatively new feedback control techniques in ecosystem management. First, we set forth a basic ecological-economic model of a predator-prey-huntin... The purpose of this paper is to explore the promise of utilizing some relatively new feedback control techniques in ecosystem management. First, we set forth a basic ecological-economic model of a predator-prey-hunting system in which both the predator and prey have use(flow) and non-use(stock) value and when the predator can inflict transboundary damages. We then use new data from the US Mountain West to show how a particular feedback approach—linear parameter-varying(LPV) control—can be utilized in this context. Our LPV model is able to quantify the cost of managing disturbances that inevitably arise as a manager tries to keep the actual path of the system "close" to its optimum. The results suggest management strategies in mountain ecosystems that feature large, mammalian carnivores. 展开更多
关键词 Feedback control Linear parameter Optimal vontrol Robust control PREDATOR-PREY Recreational hunting
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