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介绍了滨海路下立交桥空心极梁施工中的模板工艺和预应力张拉工艺,总结了本工程的施工经验、体会和特殊情况下的处理措施,可为同类工程施工所借鉴。 相似文献
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目的:采用现代制剂工艺技术与科学评价方法,将补肝健腰方由传统汤剂开发为颗粒剂,优化制备工艺并建立制剂的专属质量标准。方法:通过多因素试验优选最佳工艺条件,确定制剂的提取、成型工艺;采用TLC鉴别方法对方中代表性药味进行定性鉴别。结果:优选了剂型及制剂工艺,建立了产品质量标准,按确定的工艺参数进行验证试验,各项指标均符合要求,表明该工艺及质量标准稳定可行。结论:新制剂较原方汤剂而言,具有储存运输与服用方便、稳定性好、质量可控、有效期长且药效显著等特点,为制剂的产业化提供了科学依据。 相似文献
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Steady-state heat conduction problems arisen in connection with various physical and engineering problems where the functions satisfy a given partial differential equation and particular boundary conditions, have attracted much attention and research recently. These problems are independent of time and involve only space coordinates, as in Poisson's equation or the Laplace equation with Dirichlet, Neuman, or mixed conditions. When the problems are too complex, it is difficult to find an analytical solution, the only choice left is an approximate numerical solution. This paper deals with the numerical solution of three-dimensional steady-state heat conduction problems using the meshless reproducing kernel particle method (RKPM). A variational method is used to obtain the discrete equations. The essential boundary conditions are enforced by the penalty method. The effectiveness of RKPM for three-dimensional steady-state heat conduction problems is investigated by two numerical examples. 相似文献
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从环境岩土工程学的角度出发,对由于大量开采地下水造成的环境工程地质问题和环境水文地质问题而造成的地面沉降和塌陷、水资源短缺、水质污染及海水入侵等不良后果进行了较为全面的论述,并就各种问题的防治提出了综合措施。 相似文献
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滨海旅游发展现状及对策思索 总被引:14,自引:0,他引:14
滨海地区是全球主要的旅游地,滨海旅游是一种非常受欢迎的旅游方式.在滨海旅游的蓬勃发展中,也存在不少问题.就全球滨海旅游的布局、滨海旅游发展中存在的问题进行了分析,并提出了相应的解决措施. 相似文献
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Inspired by Rittel and Webber [Dilemmas in a general theory of planning. Policy Sciences 1973;4:155–69], it is argued that fisheries and coastal governance is confronted with problems that are inherently “wicked.” Problems are wicked (as opposed to “tame”) when they are difficult to define and delineate from other and bigger problems and when they are not solved once and for all but tend to reappear. Wicked problems have no technical solution, it is not clear when they are solved, and they have no right or wrong solution that can be determined scientifically. Instead, for wicked problems governance must rely on the collective judgment of stakeholders involved in a process that is experiential, interactive and deliberative. In this paper, the wicked problem is identified as a governability issue, recognizing that there are limitations to how rational and effective fisheries and coastal governance can possibly be. The paper offers a framework which could help us locate the wicked problems within the fisheries and coastal governance system, as well as examine their governability. 相似文献
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Ocean current forecasting is still in explorative stage of study. In the study, we face some problems that have not been met before. The solving of these problems has become fundamental premise for realizing the ocean current forecasting. In the present paper are discussed in depth the physical essence for such basic problems as the predictability of ocean current, the predictable currents, the dynamical basis for studying respectively the tidal current and circulation, the necessity of boundary model, the models on regions with different scales and their link. The foundations and plans to solve the problems are demonstrated. Finally a set of operational numerical forecasting system for ocean current is proposed. 相似文献
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简要分析、总结了我国近 1 0 a来的主要海水鱼、虾、贝、藻等的增养殖现状和存在的问题 ,并对今后可持续发展问题进行了探讨 相似文献
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青岛地区的环境水文地质问题及其防治对策 总被引:2,自引:0,他引:2
随着工农业的发展,围绕水资源的开发利用而产生的环境水文地质问题,日益向广度和深度发展。青岛地区近年来产生的环境水文地质问题主要有:地下水超采造成的区域性水位下降、海水入侵及地下水污染。另外,部分地区存在原生环境水文地质问题之一——地方性氟病。本文试就这些问题出现的原因、发展程度、防治措施及进一步的研究方向,作了一些有益的探讨。 相似文献
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滨海旅游发展中的环境问题及对策 总被引:4,自引:0,他引:4
滨海旅游在迅猛发展的同时了也带来了许多环境问题。本文总结了滨海旅游发展过程中产生的主要环境问题,并提出相应的治理措施。通过采取经济、科技、法律、宣传教育等手段,达到治理环境的 目的,促进滨海旅游的可持续发展。 相似文献