金堆城露天采场防排水方案设想及实施

凹陷露天采场排水是一个十分重要的生产工艺环节。根据金堆城露天矿采场实际情况，对采场的汇水量、排水方案、设备选型、验证配套设施、工程概述及安全渡汛需采取的措施进行了详细的说明。     

浅谈峪耳崖金矿排水系统改造

介绍了峪耳崖金矿井下排水系统,指出其存在的问题,通过分析研究提出改造方案。改分散排水为集中排水,充分利用井下水资源。     

乐平市排水专项规划设计

介绍了乐平市的城市概况及排水现状,针对其排水现状及地形地势特征,排水专项规划从实际出发,科学合理地提出了用水量指标的取值,专项规划的污水量预测合理,规划方案可行,对乐平市的排水系统建设具有较强的指导意义。     

中国2010上海世博会给水排水新技术解读与展望

借助中国2010上海世博会的契机,对给水排水新技术情况进行了全面调研,总结了世博会上展示和应用给水排水新技术的展馆和地标,解读了各个国家和地区向世界展示的给水排水方面的最新技术和先进理念,展望了城市给水排水技术未来发展的动态及趋势,指出了世博后上海给水排水技术的重点发展方向.     

广西北海市滨海大道排水设计

针对北海市滨海大道排水设计与道路两侧场地未成片开发的矛盾，采用不同种类排水涵洞解决问题，取得了较好效果。     

赞比亚铜带省谦比希铜矿主-西矿体地下水疏干排水方案对比研究

由水文监测数据出发,结合主、西矿体水文地质条件差异,井下涌水量差异比较两个矿区的水文地质情况差异。同时根据现行的疏排水方案及疏干效果的对比提出今后地下水疏干方案的相关优化方案,为同类型矿山的地下水疏干提供相关指示意义。     

塑料带排水固结法在软弱地基中的应用

本文通过工程实践，简要介绍重腐蚀湿法厂房──铜电解厂房软弱地基采用塑料带排水固结法的情况。简述了在该厂房软弱地基上进行高填土的地基处理的重要性及地基处理两种方案的计算和经济比较；并通过地基监测，评价塑料带排水固结法用于软弱地基的效果。     

浅析露天转地下开采的几个问题

针对露天转地下开采中采矿方法、开拓运输及防排水方案选择等问题进行了分析探讨,指出了露天转地下开采中应着重注意的问题。     

城市沿河地带竖向与排水规划设计——以永新县城袍田新区控制性详细规划为例

以永新县城袍田新区控制性详细规划为例,分析了影响城市沿河地带道路竖向与排水规划设计的重要因素,主要包括防洪标准、景观要求、现状高程等。规划实践证明,具体方案的选择还需要结合业主的具体要求进行。     

浅谈天铁高层住宅给排水设计

天津天铁冶金集团有限公司（以下称“天铁”）高层住宅是两栋地下1层,地上19层的高层民用建筑。文章分别从生活给水、消防给水、消防电梯井排水等方面介绍了给排水系统的设计依据和方案的确定。     

交流变频调速装置在脱水系统中的应用

概述脱水系统原设计调速方案的弊端,并具体介绍交流变频调速装置的性能及系统改造方法.     

Dyed Microspheres for Quantification of UV Dose Distributions: Photochemical Reactor Characterization by Lagrangian Actinometry

Lagrangian actinometry represents a new method of photochemical reactor characterization. The method is based on an application of dyed microspheres, which were developed by attachment of (E)-5-[2-(methoxycarbonyl)ethenyl]cytidine (hereafter referred to as S) to polystyrene microspheres. S is a nonfluorescent molecule that when subjected to ultraviolet (UV) irradiation yields a single product, 3-β-D-ribofuranosyl-2,7-dioxopyrido[2,3-d]pyrimidine (hereafter referred to as P), which displays a strong fluorescence signal. Dyed microspheres were subjected to UV irradiation under a collimated beam and using a single-lamp, monochromatic (low pressure Hg), continuous-flow reactor. In parallel with these experiments, a biodosimetry experiment was conducted using Bacillus subtilis spores as the challenge organism. Particle-specific fluorescence intensity measurements were conducted on samples from the collimated-beam experiments and the flow-through reactor experiments by flow cytometry. Estimates of the dose distribution delivered by the flow-through reactor for each operating condition were developed by deconvolution of data resulting from flow cytometry analysis of these samples. In conjunction with these experiments, a numerical model was developed to simulate the behavior of the reactor system. A commercially available computational fluid dynamics package was used to simulate the flow field, while line-source integration was used to simulate the irradiance field. A particle-tracking algorithm was employed to interrogate the flow and irradiance field simulations for purposes of developing particle-specific (Lagrangian) estimates of dose delivery. Dose distribution estimates from the microspheres assays and the numerical simulations were combined with the measured dose–response behavior of B. subtilis spores to yield estimates of spore inactivation in the flow-through experiments. For the range of operating conditions used in these experiments, predictions of spore inactivation based on dose distribution estimates from both methods were in good agreement with each other, and with the measured spore inactivation behavior. Lagrangian actinometry is capable of yielding accurate, detailed measurements of dose delivery by continuous-flow UV systems. This method represents a substantial improvement over existing experiment-based methods of UV reactor characterization (e.g., biodosimetry) in that it yields a measurement of the dose distribution for a given operating condition. This method also represents an improvement over existing methods for validation of numerical simulations. Specifically, because this method yields a measurement of the dose distribution, it is possible to compare these measurements with predicted dose distributions from the numerical simulation. The combined application of biodosimetry, numerical modeling, and Lagrangian actinometry represents an extremely robust approach to reactor characterization and validation.     

Relevance of Expression Phase in Dewatering of Sludge with Chamber Filter Presses

Biological sludge contains a large quantity of water and the decrease of its content constitutes one of the main issues for wastewater treatment plant operation. Laboratory tests to estimate the sludge dewaterability, i.e., its capability of being dehydrated, have been developed in the past, but there is no evidence of the tests’ direct correlation with the behavior of the real-scale dewatering devices. Different methods (specific resistance to filtration at different pressure, capillary suction time, expression tests, and drying test) have been applied on civil sludge conditioned with ferric chloride/lime or polymer/ferric chloride and results have been compared with operational data obtained from a full scale plant. The results presented in this paper highlight the role of the expression phase in the sludge dewatering using frame filter presses. To predict the sludge behavior and then to optimize the conditioning step, the laboratory procedure used for selecting the chemicals and doses has also to consider the effect of the expression of the cake.     

冰铜INBA粒化和脱水法在祥光铜业的应用

介绍了冰铜INBA粒化和脱水法在祥光铜业工程中应用的工艺过程,阐述了该工艺中水的闭路循环设计,并就主要设备进行了说明。     

Conservative Wetting and Drying Methodology for Quadrilateral Grid Finite-Volume Models

Algebraic equations relating fluid volume and the free surface elevation in partially wetted quadrilateral computational cells are derived and incorporated into a Godunov-type, finite-volume, shallow-water model. These equations make it straightforward to reconstruct the free surface elevation based on the volume of fluid in a computational cell, the dependent variable tracked by finite volume models for conservation purposes, regardless of whether the cell is fully or partially wetted. Improvements to the variable reconstruction process streamline the computation of mass and momentum fluxes with approximate Riemann solvers, yielding a model that simulates sub-, super-, and transcritical flows over irregular topography with wetting and drying fronts. Furthermore, the model is free from fluid and scalar mass conservation errors and it eliminates nonphysical distributions of scalars by avoiding artificial concentration and/or dilution at wet/dry interfaces. Use of this wetting and drying methodology adds roughly 10% to the execution time of flow simulations.     

Segregation of the PAH-Contaminated Fraction of Hydraulically Dredged Sediment

Semivolatile hydrophobic organic contaminants (SV-HOCs) in sediments are a growing problem. Previous research in our laboratory has demonstrated that cleanup of the entire sediment may not be necessary due to sequestration of the majority of SV-HOCs like polycyclic aromatic hydrocarbons (PAHs) into the low density fraction that we hypothesize is separable from the bulk sediment hydraulically. In our current study, PAH-contaminated sediments from the Indiana Harbor Canal were hydraulically dredged and impounded in a stilling basin by the U.S. Army Corp of Engineers to evaluate a hydraulic dredge and characterize water treatment needs. This project provided an opportunity to test our hypothesis that a segregation of SV-HOC contaminated sediments would occur via hydraulic settling processes in the stilling basin at field scale. Following decommission of the basin, sediment cores were collected along transects from the basin influent immediately after removal of the overlying water, sectioned and characterized for physical and chemical parameters. As hypothesized, sediments showed large decreases in bulk density with increasing distance from the basin inlet. PAH concentrations increased up to 40-fold (120–4,900?mg?kg?1) and were highly correlated with the fraction of low density material in the sediment. Our results provide evidence that hydraulic dredging can result in a separation of highly contaminated sediment with high amounts of low density material from bulk sediment. This outcome may be either fortuitous or detrimental depending on the ultimate means of disposal. If subsequent dewatering occurs (such as in a confined disposal facility), prediction of PAH volatilization flux needs to be based on the in situ surface concentration which can be very high due to slow settling low density particles. Conversely, if the goal is beneficial reuse, higher density sediment with relatively low PAH levels near the inlet may be readily collected.     

Neuronal pathways for activation of inhibitory interneurons in pyriform cortex of the rabbit

The neuronal pathways responsible for the fast inhibitory postsynaptic potentials (IPSPs) elicited in principal cells in the pyriform cortex (PC) by volleys from the olfactory bulb (OB), the lateral olfactory tract (LOT), the anterior commissure (AC), and the deep-lying structures of the PC (DPC) were studied in the rabbit. The central latencies of the fast IPSPs (measured from the onset of the monosynaptic excitatory postsynaptic potential (EPSP) elicited by volleys through the LOT) ranged between 3.0 and 9.3 ms (5.5 +/- 1.3 (SD) ms; n = 54) in the case of OB shocks and between 4.5 and 6.5 ms (5.1 +/- 0.7 (SD) ms; n = 7) in the case of LOT shocks. The onset latencies of the fast IPSPs were between 2.5 and 11.8 ms (5.1 +/- 1.8 (SD) ms; n = 66) in the case of DPC shocks and between 3.5 and 10.1 ms (5.8 +/- 1.5 (SD) ms; n = 61) in the case of AC shocks. The conditioning OB or LOT shocks almost completely eliminated the LOT-evoked fast IPSP when the testing shock was applied at the peak period of the conditioning slow IPSP. The conditioning OB shocks also eliminated the initial part of the OB-evoked fast IPSP, leaving the later part of the fast IPSP almost unchanged. Thus, the onset latency of the OB-evoked fast IPSP was lengthened by 7.1 +/- 2.9 (SD) ms (n = 35) by the conditioning OB shock. The conditioning OB or DPC shocks left the peak amplitude of the DPC-evoked fast IPSP almost unaffected. Similarly, the conditioning OB or AC shocks left the peak amplitude of the AC-evoked fast IPSP almost unaffected. The conditioning OB, DPC, or AC shocks had only a slight influence on the onset latency of the DPC- or AC-evoked fast IPSPs. Rhythmical steps at intervals of 3-5 ms were observed in the rising phase of the OB-evoked fast IPSP. This was interpreted as a result of a repetitive impingement of interneuronal discharges on the impaled cells. Spatial facilitation was observed among the fast IPSPs evoked by volleys from the OB, DPC, and AC when shocks were applied at suitable intervals. A slight facilitation was also seen between the LOT-evoked fast IPSP and the DPC- or AC-evoked fast IPSP. These results were interpreted as a result of the convergence of excitatory synaptic inputs onto the presumed inhibitory interneurons from the four structures of the brain. A temporal facilitation of the fast IPSPs was observed when the OB, DPC, or AC shocks were applied repetitively at short intervals. This suggests a temporal facilitation of the spike discharges of the presumed inhibitory interneurons under similar conditions. From these results, criteria were determined for identifying the inhibitory interneurons.     

Shear Strength Equations for Unsaturated Soil under Drying and Wetting

Shear strength of unsaturated soil is an important engineering property in various geotechnical designs. In response to varying climatic conditions, unsaturated soil behaves differently under the drying and wetting processes due to hysteresis. Many research works were conducted and numerous equations were proposed for unsaturated shear strength, however, most of them were limited to the soil under the drying process. In this study, shear strength equations were categorized according to the nature of equation, i.e., fitting and prediction type equations. The purpose of this study is to propose prediction type shear strength equations for unsaturated soil under drying and wetting. Twelve published shear strength equations were selected for evaluation. A series of unsaturated consolidated drained triaxial tests were conducted on statically compacted sand-kaolin specimens under drying and wetting to examine the validity of the proposed equations. The experimental results indicated that the specimens on the drying path had a higher shear strength and exhibited more ductility, less stiffness, and contraction during shearing while the specimens on the wetting path had a lower shear strength and exhibited more brittleness, more stiffness, and dilation during shearing. The proposed equations were shown to provide the best predictions on the drying and wetting shear strength results from this study as well as published data in the comparison study.