浅谈建筑太阳能一体化的技术与应用

目前,我国太阳能技术与应用日趋成熟,建筑太阳能一体化这项新的课题引起了社会各界的广泛关注和重视。本文通过对工程中实施建筑太阳能一体化的具体问题进行分析,从工程系统设计、组织施工、质量控制等方面进行了研究,将太阳能的产品及构件与建筑同步设计,同步施工,同步验收：并做到与建筑进行有机的结合。     

沥青同步碎石封层工艺在道路工程中的应用

在社会发展新时期,我国交通需求日增多,道路工程建设越来越多。随着我国科学技术的进步,越来越多的先进施工工艺在道路工程建设中得到推广和应用,其中,同步碎石封层工艺就是一个典型。同步碎石封层工艺具有很好的防渗水性能和抗滑性能,在道路工程建设和道路养护中发挥着重要作用。本文介绍了同步碎石封层工艺的特点,并在此基础上对沥青同步碎石封层工艺在道路工程中的具体应用进行了分析,希望能够为我国道路工程建设提供一些帮助。     

佛山市重大工程廉洁风险同步预防标准化建设及探索

本文通过佛山市重大工程廉洁风险同步预防标准化建设及实施进行研究,总结了目前的佛山市重大工程廉洁风险同步预防的现状。在标准化建设过程中,编制出台了《重大工程廉洁风险同步预防工作指引(试行)》,为推进党风廉洁建设和反腐倡廉工作提供了一定的策略参考意见。     

浅淡在三、四级公路改建和新建时安保工程应同步实施

在原建好的三、四级公路上实施安全保障工程,由于受弯道半径、路面宽度、路线纵坡等技术指标的限制,在实施安全保障工程时,存在诸多不便因素,严重影响安全保障工程实施。因此,在新建和改建三、四级公路时,安全保障工程应同步实施。     

注塑工程训练教学的研究与实践

对注塑工程训练进行了规划与设计,介绍了工程训练的目的、内容、要求、方法和实施效果。通过注塑工程训练,加深了学生对注塑模具结构、注塑设备、注塑工艺理论和技术的理解,提高了学生综合运用所学知识解决工程实际问题的能力、现代设计制造的能力以及创新能力。     

DDS73F20B四十臂井径测井工艺改进的研究

文章介绍DDS73F-20B四十臂的工作原理,以及技术人员对在使用过程中发现的校深问题和射孔孔眼漏测现象进行分析和研究,并提出新的测试工艺并实施。改进的仪器和工艺降低了该仪器对井况的要求,从而提高其服务范围。同时,测试资料质量也有了同步提高。     

同步工程之总装工艺应用

汽车行业竞争激烈,怎样才能快速推出新的车型占领市场成为厂商需要解决的重要问题。同步工程技术的运用使得开发周期可以大幅缩短,总装工艺的设计中同步工程的应用往往占据比较重要的地位。     

随焊同步碾压焊缝改善Ly12cz焊接接头机械性能的研究

利用所研制的 HNJ—1型焊接同步碾压机探讨了随焊同步碾压焊缝改善焊接接头机械性能的新工艺。试验结果表明,随焊同步碾压相对于焊后室温碾压具有更好的强化效果,并对改善接头塑性也有一定的作用。随焊同步碾压焊缝具有破碎枝晶、细化晶粒的作用,改善了焊缝显微组织。该法实现了焊接和强化一次完成,简化了焊接接头强化工艺。     

增加项目的透明度

同步工程和连续规划设计，这是用户合同在项目规划设计和实施中对流程设备生产制造商的要求。Visual PlantEngineer是一种基于微软产品的软件系统，它能够很好地满足这些要求。     

工程招投标价格控制研究

由于我国的工程招标投标的实施是同步于经济体制的改革，因此我国的招标投标方式不同于国际通行的方法本文主要通过对建设工程招投标的分析，提出了风险控制的六项对策。     

Photostimulated emission of GaN layers and devices

Photostimulated emission (PSE) of epitaxial GaN layers is readily obtained at photoexcitation densities of order MW cm⁻² at temperatures up to room temperature. We report surprising spectral differences between PSE obtained using surface and edge emission geometries for a particular sample. While the peak energy of PSE from the surface of this sample is downshifted from the GaN band edge by only a small amount, the photon energy of the edge-emitted light is reduced by 100 meV. Exactly the same downshift is observed in the edge emission spectrum of a commercial Nichia light emitting diode. The origin of the anomalous PSE peaks revealed in these measurements is discussed with reference to recent literature.     

瓦斯爆炸抑制材料特性及其作用研究述评

介绍了近年来国内外瓦斯爆炸抑制材料的研究现状及其研究成果,重点分析了冷气溶胶、粉末喷雾抑爆剂对煤矿瓦斯爆炸的抑制效果,认为采用冷气溶胶、粉末喷雾抑爆剂等方法抑制瓦斯爆炸有可能为瓦斯防治领域开辟新的途径。     

中国工程爆破协会简介(2010年12月)

<正>中国工程爆破协会是由国务院国有资产监督管理委员会主管,由民政部、公安部、国家安全生产监督管理总局、中国有色金属工业协会等领导部门指导下的全国从事工程爆破的22个部门系统的企事业单位组成的行业性社会团体。     

Probabilistic analysis of multi-site damage in aircraft fuselages

 Most aircraft fleets nowadays are operating under the concept of damage tolerance, which requires an aircraft to have sufficient residual strength in the presence of damage in one of its principal structural elements (PSE) during the interval of service inspections. The residual strength however is significantly reduced due to multi site damage (MSD). In the present paper, a probabilistic framework for the computation of the failure probability is developed. The MSD problem of a PSE is considered, where the uncertainties in crack initiation and crack growth as well as yield stress and fracture toughness are described by random variables. For the crack growth calculations the finite element alternating method [1], which avoids a remeshing of the finite element problem, is used. After specifying link up and failure criteria, importance sampling is employed to obtain the probability of failure of the PSE due to MSD. Received: 29 July 2002 / Accepted: 18 December 2002     

Smart production systems: automating decision-making in manufacturing environment

Smart production systems (SPS) are manufacturing systems capable of autonomously diagnosing their health and autonomously designing continuous improvement projects, leading to the desired productivity improvement. The main component of SPS, developed in this paper, is the Programmable Manufacturing Advisor (PMA), which evaluates the system's health and calculates optimal steps for continuous improvement. The analytics of PMA are based on the theory of Production Systems Engineering (PSE); the numerics of PMA are based on PSE Toolbox, which implements the PSE methods. In this paper, the PMA-based SPS architecture with manager-in-the-loop is described, theoretical/analytical foundations of PMA are outlined, its software/hardware implementations are commented upon, and demonstrations of PMA-based SPS operation are provided using two production systems: automotive underbody assembly (large volume manufacturing) and hot-dip galvanisation plant (small manufacturing organisation).     

Comparative study on a 0.2C steel treated by Q&P and A&T treatments

The effect of various versions of quenching and partitioning (Q&P) and austempering plus tempering (A&T) processes on the combined properties and microstructure of a 0.2C–0.8Si–2.2Mn bainitic steel has been investigated. Results show that the steel exhibits a higher value of product of strength and elongation (PSE) than that reported before with similar compositions. The one-step Q&P process at 230°C and A&T process at 450°C can result in a toughness higher than 80?J?cm^?2 and a relatively high PSE (above 29.8?GPa%). The alloy design of this steel is suggested to be beneficial for industrial production because there is a big window for similar PSE. The long-partitioning time (1?h) has good effect on combined properties.     

Highly selective fluorometric determination of polyamines based on intramolecular excimer-forming derivatization with a pyrene-labeling reagent

We introduce a novel approach in highly selective and sensitive fluorescence derivatization of polyamines. This method is based on an intramolecular excimer-forming fluorescence derivatization with a pyrene reagent, 4-(1-pyrene)butyric acid N-hydroxysuccinimide ester (PSE), followed by reversed-phase high-performance liquid chromatography (HPLC). Polyamines, having two to four amino moieties in a molecule, were converted to the corresponding dipyrene- to tetrapyrene-labeled derivatives by reaction (100 degrees C, 20 min) with PSE. The derivatives afforded intramolecular excimer fluorescence (450-520 nm), which can clearly be discriminated from the monomer (normal) fluorescence (360-420 nm) emitted from PSE, its hydrolysate and monopyrene-labeled derivatives of monoamines. The structures of the derivatives were confirmed by HPLC with mass spectrometry, and the emission of excimer fluorescence could be proved by spectrofluorometry and time-resolved fluorometry. The PSE derivatives of four polyamines [putrescine (Put), cadaverine (Cad), spermidine (Spd), and spermine (Spm)] could be separated by reversed-phase HPLC on a C8 column with linear gradient elution. The detection limits (signal-to-noise ratio of 3) for the polyamines were 1 (Put), 1 (Cad), 5 (Spd), and 8 (Spm) fmol on the column. Furthermore, the present method was so selective that biogenic monoamines gave no peak in the chromatogram.     

The Social Impact of Pharmaceutical Innovation

Abstract

A new simple, precise, rapid, and selective reversed-phase ion pair high-performance liquid chromatography (RP-HPLC) method has been developed for the simultaneous determination of pseudoephidrine (PSE) and terfanidine (TER) from tablets using 60:15:25 acetontrile:methanol:water (v/v) containing 2.9 g sodium lauryl sulfate/liter, pH adjusted to 3.1 using phosphoric acid as a mobile phase and C₁₈ Spherisorb ODS 2 (3 µm, 5 cm × 4.6 mm i.d.) as stationary phase. Detection was carried out using a UV detector at 254 nm. A constant flow of 1.0 ml/min was maintained throughout the analysis. Retention times for PSE and TER were 1.90 and 7.35 min, respectively. Linearity range and percentage recoveries for PSE and TER were 24–1200 and 12–600 µg/ml, and 100.01 and 100.4%, respectively.     

Development of a new formulation combining calcipotriol and betamethasone dipropionate in an ointment vehicle

Calcipotriol and betamethasone dipropionate are widely used effective treatments for psoriasis. Combined therapy is known to be superior to monotherapy, but current formulations do not permit simultaneous application as the drug substances will degrade when mixed. The purpose of the study was to develop a formulation which combines calcipotriol and betamethasone dipropionate in a single vehicle hereby achieving optimal delivery of both substances into the skin. As the two substances are incompatible in aqueous and alcoholic medias, different non-aqueous formulations were prepared. Skin permeation studies were investigated using Franz-type diffusion cells. Formulations based on isopropyl myristate were found to decrease the permeation rate (25-35%) as compared with marketed monotherapy products (set to 100%). Lanolin had no overall effect on skin permeability. However, polyoxypropylene-15 stearyl ether (PSE) had a marked effect. A 5% PSE formulation resulted in a permeation rate comparable to the marketed products. Thus, by using PSE as solvent, it was possible to combine calcipotriol and betamethasone dipropionate in a single formulation while optimal skin permeability was attained. Recently, the efficiency of this formulation (Daivobet®) has been verified in clinical studies showing an improved efficacy in the treatment of psoriatic patients.     

基于颜色属性的光谱重建训练样本正交优化

选择具有代表性的颜色作为光谱重建的训练样本可以有效减少样本冗余,提高光谱重建精度。采用正交试验方法,基于色相、明度和饱和度在Munsell颜色集中选择具有代表性的颜色样本,并分析颜色三属性对光谱重建精度的影响。结果表明,采用主成分分析(PCA)法重建得到的反射率与原反射率的平均均方差(RMS)最大可达0.120 4,而采用违逆(PSE)法和R矩阵(R-matrix)法重建得到的平均RMS相对较小。三属性的优先级别R极差分析中,明度明显大于色相和饱和度。颜色三属性对P C A法的影响大于对PSE法和R-matrix法。明度对光谱重建精度的影响较大,而色相和饱和度对光谱重建精度的影响相对较小。