小型水库溃坝洪水演算探讨

本文简要介绍了现有溃坝洪水的计算方法,根据新疆奎屯河"87"溃坝性洪水演算实例.推荐了一种简单可靠的适合小型水库溃坝洪水计算的方法.     

Assessing the performance of intumescent coatings using bench‐scaled cone calorimeter and finite difference simulations

A method was developed to assess the heat insulation performance of intumescent coatings. The method consists of temperature measurements using the bench‐scaled experimental set‐up of a cone calorimeter and finite difference simulation to calculate the effective thermal conductivity dependent on time/temperature. This simulation procedure was also adapted to the small scale test furnace, in which the standard time–temperature curve is applied to a larger sample and thus which provides results relevant for approval. Investigations on temperature and calculated effective thermal conduction were performed on intumescent coatings in both experimental set‐ups using various coating thicknesses. The results correspond to each other as well as showing the limits of transferability between both fire tests. It is shown that bench‐scaled cone calorimeter tests are a valuable tool for assessing and predicting the performance of intumescent coatings in larger tests relevant for approval. The correlation fails for processes at surface temperatures above 750°C, which are not reached in the cone calorimeter, but are attained in the small scale furnace set‐up. Copyright © 2006 John Wiley & Sons, Ltd.     

塑料排水板的等效直径

首先，通过室内模型试验认为，一字形塑料排水板在换算成等效直径的砂井时换算系数宜为0.85-0.9。然后，对等效直径的各种研究方法进行了讨论，并给出了排水板等效直径的定义。     

Ionoluminescence decay measured with single ions

A new ion beam analysis-based, single ion technique called the time to first photon has been developed to measure the decay of the luminescence signal of phosphors. Such measurements are currently needed to study luminescence decay mechanisms following high-density excitations and to identify strongly luminescent phosphor coatings with short lifetimes for ion photon emission microscopy (IPEM). The samples for this technique consist of thin phosphor layers placed or coated on the surface of PIN diodes. Single ions from an accelerator strike this sample and simultaneously create ion beam induced luminescence (IBIL) from the phosphor that is measured by a single-photon-detector, and an ion beam induced charge collection (IBICC) signal in the PIN diode. In this case, the IBICC signal provides the start pulse and the IBIL signal the stop pulse to a time to amplitude converter. It is straightforward to show that this approach also measures a signal proportional to activity versus time with an accuracy of 5% as long as the number of detected photons per ion is less than 0.1, which usually requires the use of absorbers for the IBIL detector or electronic discrimination for the IBIL signals. Details of the new analysis are given together with examples of luminescence decay measurements of several ceramic phosphors being considered to coat IPEM samples. IPEM is currently being developed at Sandia National Laboratory (SNL), the University of North Texas in Denton, and the Universities and INFN of Padova and Torino.     

工程监理取费偏低,阻碍监理行业发展

工程监理制在我国建筑市场中，对提高工程质量、控制投资效益起着极其重要的作用，目前我国工程监理行业在低取费的条件下，困难重重，只能维持低水平运行。我们应找出存在的差距，采取相应的措施，适当提高监理取费，使监理行业迅速发展壮大。     

成藏流体历史分析——以黄骅坳陷三马地区为例

应用储集层岩石烃类流体包裹体研究方法，对黄骅坳陷三马地区沙一段油藏进行了重建成藏流体历史的尝试。对包体流体状态的分析表明，成藏流体具有高密度，高矿化度的性质，被捕获时的温度约为110－140℃，成藏流体的主要充注时期在明化镇组沉积期，距今为10－4Ma之前，充注成藏后的小幅度构造抬升中可能使原称油水界面以下的地层水矿化度发生变化，导致现今储集层流体矿化矿比包裹体流体矿化度明显下降。图5表2参6（钟宁宁摘）。     

热释电系数的测量方法

描述热释电系数的两种测量方法。其一为电荷积分法，测试系统简单，测量数据准确，且能满足零电场条件下的测量。其二为动态电流法，采用调制热源技术，研究在特定温度条件下热释电材料的动态热释电响应。     

Halogen-induced charge transfer polymerization of pyrrole in aqueous media

Simultaneous polymerization and doping of pyrrole have been carried out in the presence of a halogenic electron acceptor, bromine (Br₂) or iodine (I₂), in aqueous dispersion or in a two-phase solvent system. The morphology of the polypyrrole (PPY) so produced is granular and porous. The electrical conductivity of the PPY-I₂ charge transfer (CT) complex is of the order of 10¹ ohm⁻¹ cm⁻¹ while that of the PPY-Br₂ complex is about one order of magnitude less. Both complexes are stable in the atmosphere. The physicochemical properties of the PPY-I₂ and PPY-Br₂ CT complexes prepared under various experimental conditions are examined in detail.     

回转体拉深件毛坯直径的简捷计算及误差分析

通用的回转体拉深件毛坯直径的计算公式繁琐，不蝗记忆，特别是利用中线尺寸常出现小数点使计算复杂，本文针对此问题分别推导出了利用中线尺寸和不用中线尺寸时，毛坯直径的简捷计算公式。并进行了误差分析，最后用实例对简捷计算方法的正确性给予了验证。     

Chemistry and Physics of Alkali Metals on MoS2 Surfaces

The interaction of alkali metal with surfaces has been of great interest to the community of catalysis since alkali metal can play an important role as a promoter. On alkali-doped MoS₂, such a promotion effect of alkali metal has been exemplified in the direct synthesis of linear alcohols from CO and H₂, where the alkali-doping switches the catalyst selectivity from methanation to alcohol synthesis. This paper reviews recent high-resolution X-ray photoelectron spectroscopy experiments that have provided direct observation of electron transfer from alkali metals to a model single crystal MoS₂ and the capture of the supra-valence electrons in the subsequent oxidation reactions.