Excel在评标中的应用

用Excel建立评标记分系统,实现自动判断有效报价、自动计算投标报价分、自动进行评委评分的小计(合计或总计)、自动计算去掉一个最高分及一个最低分后的投标文件最终得分、自动确定评标委员会推荐的中标候选人,解决了人工计算评标数据既耗时又容易出错的弊端。     

谈水利工程投标报价分值通用计算表格的设计

水利工程施工招标评标中对投标报价分值计算的内容相似,但计算的方法不尽完全相同.文章从水利工程投标报价设计计算通用表格出发,提出了自己报价得分计算的基本思路.     

基于综合评分法的采购项目投标报价价格系数取值影响分析

综合评分法中,价格得分是评标的关键,价格系数决定价格得分。本文基于实际采购项目报价数据,按照规定的价格得分计算规则,计算不同价格系数取值时各组投标报价价格得分和排序,按照项目类型分析了价格系数取值对价格得分影响,针对不同性质的项目得出了具体结论,并提出取值建议。     

某排水隧洞设计招标评标办法分析与探讨

摘要：在水利工程设计招标中,需要针对设计的特点制定相应的评标办法,以便更好地选择设计单位并指导投标单位合理报价。本文结合某排水隧洞设计项目的特点,从评标因素选择及量化、投标人资格设定、报价得分计算等方面对评标办法进行了分析总结,为进一步提高招标效果,提出了建议。     

山西近期河道治理工程投标报价与招标控制价的关系研究

通过大量参与山西省水利行业近期河道治理工程的投标工作,根据招标采用的评标基准价计算办法,研究分析了评标基准价与招标控制价的线性关系,以及投标人最高报价、最低报价与招标控制价的关系.从而可以预测所投标段的评标基准价、最高报价、最低报价,为投标报价提供参考,使报价尽量接近评标基准价,以减少商务部分扣分,为整个投标获得高分打下基础,进而帮助投标单位入围。     

微软Excel办公软件在水利水电工程评标中的应用

随着水利水电工程项目的增加及招投标工作的普及,在水利水电工程的开标、评标工作中,各种数据的计算与取舍是一项非常烦琐的工作,为了能在评标工作中快速、准确地计算出投标报价与标底的差额与比值、复合标底、报价得分等各种数据,可通过利用Excel软件中的强大计算功能,实现上述各种计算和取舍工作,使水利水电工程的开标、评标工作从烦琐的造价得分计算工作中摆脱出来,使有关人员能够集中精力对各投标单位的施工能力、施工组织设计、质量保证措施、业绩和信誉等进行更深入的研究和评判,为业主推选出最好的施工队伍.     

完善土建工程招标文件编制方法浅见

从招标文件编制上分析了如何导向投标单位进行理性竞争。通过设置最高限价,把投标报价控制在招标人的期望值范围之内;通过把鼓励低价同限制恶性竞争相结合的办法,鼓励良性竞争;在招标文件的导向上,使大多数投标人的投标报价在合理最低价左右浮动。同时,施工组织设计评分与投标报价相结合,量化技术标评分值,使评标专家在评标时的操作性更强,尽可能减少评标过程中的主观打分值。最后,通过量化技术标评分值,对投标报价的评分进行了补充和完善。     

工程项目招标中评标标底若干问题研究

根据《中华人民共和国招标投标法》及有关规定,分析标底与评标方法之间的关系;探讨评标标底的作用,指出评标标底只能起到衡量投标报价合理程度的作用,不是决定投标人中标的决定性因素.研究了评标标底的类型、确定方法及这些方法的优缺点,提出现阶段应采用复合标底进行评标,即以招标人编制的标底与投标报价的加权平均值计算得到的评标标底作为复合标底.     

工程投标竞争性判定及影响因素分析

本文阐述了投标竞争和竞争力的相关概念以及竞争性有无与强弱的区别和判断办法;从投标人、招标控制价、投标报价、评标办法和评标专家的角度,分析了投标竞争性的影响因素,以及评标专家在评标过程中对投标竞争性的判定原则。     

基于百分制评标办法运用概率分析的报价方法探讨

在激烈的建筑市场竞争体制下，水电施工企业要想中标必须编制合理报价，不同的评标办法，其编制报价的方法与策略是不相同的，通过对历史投标统计资料的分析，文章提出了一种基于百分制评标办法运用概率分析的报价方法，该方法将量化分析运用于投标决策，为投标报价提供一个科学的，定量的决策依据，运用此方法能确保投标报价不失误，且能得到一个较高的报价评分。     

地下厂房施工过程的三维非线性数值模拟分析

根据冗各电站地下厂房开挖支护的施工顺序,以隐式杆单元模拟锚杆,以壳单元模拟混凝土喷层,采用三维非线性有限元技术,对洞室群的开挖支护动态过程进行了模拟计算。通过三维非线性有限元计算分析得到:洞室群动态开挖过程中围岩应力变形的分布规律,围岩塑性区的发展规律,锚杆受力变化情况。计算结果表明:整个开挖过程中,洞周围岩位移变化规律正常,量值较小,塑性区主要分布在洞室周边,围岩稳定性较好;但在洞室交叉口处围岩的变形较大,出现较大范围的塑性区,在此基础上提出了支护措施优化方案,并对优化方案的效果进行了评价。     

Evaluation of freshwater mussel relocation as a conservation and management strategy

The relocation of unionacean mussels is commonly used as a conservation and management tool in large rivers and streams. Relocation has been used to recolonize areas where mussel populations have been eliminated by prior pollution events, to remove mussels from construction zones and to re-establish populations of endangered species. More recently, relocation has been used to protect native freshwater mussels from colonization by the exotic zebra mussel Dreissena polymorpha. We conducted a literature review of mussel relocations and evaluated their relative success as a conservation and management strategy. We found that 43% of all relocations were conducted because of construction projects that were forced to comply with the Endangered Species Act 1973 and that only 16% were monitored for five or more consecutive years. Most (43%) relocation projects were conducted from July to September, presumably a period when reproductive stress is relatively low for most species and the metabolic rate is sufficient for reburrowing in the substrate. The mortality of relocated mussels was unreported in 27% of projects; reported mortality varied widely among projects and species and was difficult to assess. The mean mortality of relocated mussels was 49% based on an average recovery rate of 43%. There is little guidance on the methods for relocation or for monitoring the subsequent long-term status of relocated mussels. Based on this evaluation, research is needed to develop criteria for selecting a suitable relocation site and to establish appropriate methods and guidelines for conducting relocation projects.     

基于模型试验的河床砂砾石层基本特性研究

为了经济可靠地确定深厚覆盖层的基本特性参数,以大渡河双江口水电站坝基河床砂砾石层基本特性研究为工程背景,进行大尺寸模型试验,研究河床砂砾石层的旁压模量和动探击数随密度、级配以及上覆压力的变化规律。根据室内模型试验结果,结合现场旁压试验及钻孔试验成果,推断出坝址区河床砂砾石相关层位的密度,并依此进行砂砾石室内力学试验,获得设计所需力学参数。研究成果可为深厚覆盖层基本特性测试提供新的方法。     

基于BP神经网络-马尔科夫链模型的隧道围岩位移预测

在隧道工程施工中,围岩位移预测起着很重要的作用。将BP神经网络-马尔科夫链模型引入到隧道围岩位移预测中来,通过对训练样本的学习,利用BP神经网络实现了对位移时间序列的滚动预测,同时得到了实测值与预测值的相对误差;在此基础上利用马尔科夫链对相对误差进行修正,有效地提高了预测结果的精度。并将该模型应用于某公路隧道拱顶下沉位移时序预测中,结果表明该模型具有精度高、科学可靠的特点,为隧道围岩变形的预测提供了新的途径。     

Short communication. Pipelines as a refuge for freshwater snails

In the lower River Murray, Australia, populations of gastropods have declined markedly over the past 40 years. Of the native fauna of about 18 species, only the ancylid Ferrissia petterdi remains common (but in patches), and another five species feature in sporadic local resurgences. Until recently the viviparid Notopala was thought to be extinct. The introduced physid Physa acuta is widespread, but in low numbers. The decline probably is associated with flow regulation, high turbidity and the introduction of common carp. Snail populations have persisted, however, in irrigation pipelines fed from the river, where they periodically cause blockages. This paper reports the discovery of the only known populaion of Notopala hanleyi in a pipeline where the inner wall accumulates microbial and other organic matter, providing high quality food for snails. In the Murray before regulation most of the periphytic biomass was probably microbial, as fluctuating water levels would have maintained littoral communities in a highly productive, early state of succession his postulated that, by stabilizing seasonal water levels, regulation has promoted the production of filamentous green algae, an inferior food source, and so displaced snail populations from the open aquatic environment.     

浙江省水域调查录入系统的设计和应用

浙江省水域调查录入系统将调查数据与电子地图相整合,对分类水域数据进行统计计算,并对输入数据进行合理性和完整性检查,得到调查范围内现有水域的详细数据,实现了水域调查数据输入、计算、统计和查询的数字化管理,提高了工作效率和工作质量,为各地下阶段水域保护规划编制和水域管理工作提供了数据支持。对该系统的设计原则、功能和技术设计等作了介绍。     

基于CT-连续加荷水泥乳化沥青混凝土细观损伤规律研究

利用CT技术对水泥乳化沥青混凝土的细观损伤过程进行实时扫描观测,获得了混凝土试件在连续加荷下的CT图像。通过采用直观分析法、CT数分析法、CT数与损伤变量关系3种方法分析表明,水泥乳化沥青混凝土的破坏过程可分为压密、扩容、裂纹扩展、破坏4个阶段,同时混凝土在受压过程中具有韧性,在极限荷载之前各断面处于压密和微扩容的强化阶段,极限荷载之后混凝土从损伤到破坏发展比较平稳。     

浅谈天湖水电站水轮机运行故障及处理措施

简述天湖水电站投运以来各种故障的表现形式，分析其原因，提出了相应的处理方法及措施，并对合理利用国内外设备提出建议。     

Fish assemblage response to recent mitigation of a channelized warmwater stream

Various designs of low‐head dams are used to rehabilitate streams or forestall upstream channel incision after channelization. We report on the efficacy of using notched sills and grade control structures (GCS) to restore the fish assemblage in Luxapallila Creek, Mississippi. We tested the null hypotheses that habitat variables and species richness, evenness, and assemblage structure would not differ among: (1) a channelized segment with no modifications; (2) a channelized segment mitigated by the installation of sills and GCS; (3) a segment upstream of the installations and undergoing channel incision; and (4) an unaltered segment. Although habitat variables changed, neither species richness, evenness, nor fish assemblage structure differed between mitigated and channelized segments with both exhibiting less richness and different assemblage structures than the unaltered segment. Lack of differences in species richness between the incised and unaltered segments suggest that the GCS may have halted the negative effects of upstream channel incision before species were extirpated. Conspicuous habitat differences between the altered (channelized and mitigated) and unaltered segments were lack of backwaters and canopy coverage and finer substrates in the altered segments. Our results suggest a more comprehensive rehabilitation strategy is required in Luxapallila Creek. Published in 2003 by John Wiley & Sons, Ltd.     

NUMERICAL STUDY OF WAVE EFFECTS ON SURFACE WIND STRESS AND SURFACE MIXING LENGTH BY THREE-DIMENSIONAL CIRCULATION MODELING

1. INTRODUCTION Coastal and continental shelf regions are characterized by intensive interaction between wave and current. These regions are of great economic significance to mankind. Therefore, the modeling of wave and current as well as their mutual int…