海上液压升降平台的缓冲与平衡

介绍了一种FD32型力士乐平衡阀，它已被应用到胜利油田多个海上升降平台，现场应用证明该阀在升降过程中制动平稳，保压时间长，平台无下降现象，安全可靠。     

Use of cascade reduction potential for selective precipitation of Au,Cu, and Pb in hydrochloric acid solution

Optimization of reduction potential for electroseparation was studied for the recovery of gold, copper, and lead from acidic solution. A linear sweep voltammetric method enabled us to determine characteristic reduction potentials for each metal and the kinetics of the metal deposition indicated by current-voltage curves. In order to precipitate the metal species sequentially, reduction potentials were examined for the individual and mixed solutions of Au(III), Cu(II), and Pb(II). The three metals were reasonably well isolated from the mixed solutions such as Cu(II)/ Pb(II) and Au(III)/Cu(II)/Pb(II) in the order of the corresponding reduction potentials, in particular, the mass transfer controlled reduction potentials, obtained from linear sweep voltammetry (LSV) measurement.     

Quantifying Whitewater Recreation Opportunities in Cataract Canyon of the Colorado River,Utah: Aggregating Acceptable Flows and Hydrologic Data to Identify Boatable Days

The structural norm approach was combined with the Potential for Conflict Index to define recreation streamflow needs for the Colorado River in Utah and Colorado. An online survey was completed by 128 commercial and non‐commercial boaters, who evaluated a range of flows for whitewater boating. For the Cataract Canyon reach, respondents rated the quality of their recreation experience of specific flows, describing the quality of boating opportunities across the full range of historical streamflows. Ranges for both acceptable and optimum flows were defined, as well as thresholds for unacceptable flows. These ranges were then evaluated against historical hydrologic records to quantify the timing, frequency, and duration of days when defined whitewater flows exist across different year types (i.e. average boatable days). Results indicated that on average, a total of 257 boatable days existed in dry years, and 353 total boatable days occurred in dry‐typical years. In wet and wet‐typical years, 362 and 365 total boatable days respectively, occurred on average. Results of the boatable days' analysis indicated that over the 23‐year period of record, whitewater boating opportunities occurred nearly every day of the year in all but the driest year types. Results from this study provide resource managers with information which can be used in the development of annual operating plans for the Colorado River Basin and help managers understand how changes in flow impact the quality of recreational opportunities. This application demonstrates the value of analysing boatable days on any river where recreation management is a priority. Copyright © 2016 John Wiley & Sons, Ltd.     

负摩阻力计算及对桩承载力的影响

探讨了负摩阻力的计算方法及考虑负摩阻力时对桩承载力的验算，对软土层超过１５米，上部堆载大或地下水位大幅度下降地区的桩，尤其是端承桩而言，具有较大的工程实际意义。     

管内阴极保护的数值模拟(Ⅱ)——有限差分法计算大口径管内的电位分布

采用有限差分技术对大口径输水管道管内阴极保护电位分布进行计算,理论值与实测值符合得较好。     

抚顺市空气环境可吸入颗粒物来源解析

应用受体模式的化学质量平衡法对抚顺市城区空气环境可吸入颗粒物(PM10)的来源进行解析,得出了各排放源类对PM10的贡献率,揭示了治理PM10污染的重点所在。     

烟气轮机运行中动平衡破坏的原因分析及维护措施

对引发烟气轮机动平衡破坏的原因进行分析 ,并举例加以说明 ,进而提出了烟气轮机平稳运行的维护措施     

以创新的理念搞好热力学第二定律及其工程应用的教学

热力学第二定律是化工热力学核心教学内容之一,是工业装置用能标定和评价的基础,因此如何在本科热力学教学中说清热力学第二定律,掌握其工程应用方法显得尤为重要.作者根据多年的实际教学经验,从熵的基本概念、定性与定量表达方法出发,引申出熵产、理想功、损失功和有效能等基本热力学量,并将其应用于评价实际化工单元过程和装置组合.     

平均吸引势模型状态方程用于固体在超临界流体中溶解度的计算

基于膨胀液体概念，把超临界流体看作是被气体膨胀了的液体，并假设体系的分子吸引势为范德华气体和凝聚液体吸引势的体积平均值、导出了一个平均吸引势模型状态方程。该方程较好地关联了纯溶剂蒸汽压及超临界二氧化碳的Ｐ－Ｖ－Ｔ关系；并关联了１４种固体溶质在超临界二氧化碳中的溶解度数据，结果优于ＲＫ、ＳＲＫ及ＰＲ方程。     

Ozonation of Humic Substances: Effects on Molecular Weight Distributions of Organic Carbon and Trihalomethane Formation Potential

Four different sources of humic substances were studied to determine the effects of ozonation on molecular weight-distributions, based on dissolved organic carbon (DOC) and trihalomethane formation potential (THMFP). Solutions of two soil-derived fulvic acids and a one soil-derived humic acid, as well as dissolved organic matter (DOM) associated with a natural water source were studied. Both gel permeation chromatography (GPC) and ultrafiltration (UF) were employed to define apparent molecular weight (AMW). Applied ozone doses ranged from 2.0 to 2.5 mg O₃/mg DOC. Overall samples of untreated and ozonated waters, as well as individual molecular weight fractions, were characterized according to DOC, UV absorbance, and THMFP. Ozonation resulted in a significant disappearance of higher AMW material with a corresponding increase in lower AMW material. Although little overall reduction in DOC concentration was observed, significant overall reductions in UV absorbance and THMFP levels were observed.