国产Ru/Al2O3甲烷化催化剂的工业应用与探讨

对国产Ru/Al2O3催化剂研制开发、侧线试验及工业化试用情况进行了探讨,为国产Ru/Al2O3催化剂的推广应用提供了依据.     

机械制造技术实践教学的探索

为提高高职学生的技术应用能力，机械制造技术作为机械制造专业的主干课，应配合不同阶段，形式多样的实践教学。本对机械制造技术实践课程的实施作了一定程度的探索，提出了一些可行性建议。     

大比例配用进口粉矿的烧结试验及生产

安钢烧结厂为应对原料条件的变化，就烧结配加进口粉矿进行了试验。以试验结果指导生产，顺利地实现了原料结构的改变，以及工艺参数的优化和生产指标的改善。     

EXPERIMENTAL RESEARCH ON RADIATION FROM DOUBLE CYLINDRICAL STRUCTURES

1. INTRODUCTION Induced by unbalanced mechanical forces and moments, underwater structures vibrate and radiate The main form of underwater structures, such a submarine, is reinforced double cylindrical structure immersed in water, with fluid media filled between th double cylindrical shells. In essence, this is a coupling problem between fluid and structure. Multipl methods have been used to estimate radiation leve from underwater structures[1-9]. Musha[10] and Chertock[11] estimate the …     

电脑—探针微孔测量方法研究

本文讨论了微孔自动化测量装置的原理与结构。电接触探针在微机控制下,在X方向找中心,在Y方向进行孔径测量。该系统不仅能实现测量过程自动化和测量结果自动显示,而且能自动消除测量工作台丝杠螺母反向间隙对测量精度的影响。     

ANOM在质量控制中的应用

ANOM（均值分析）是一种有效的质量工具，可以用来分析实验因素对输出的影响是否显著。可以应用于单因子，双因子的实验设计，无论是计量值数据，还是计数值数据，ANOM检验异常值的能力都很强，介绍了ANOM的基本分析过程，对ANOM和ANOVA进行了检验异常值灵敏度大小的比较，同时给出了实例。     

大型90°弯头应力测试与爆破试验研究

通过对一大型90°弯头进行应力测试与爆破试验,得到了内压载荷下该厚壁弯头的外壁应力分布情况,确定了弯头的薄弱部位,并将试验结果与理论计算结果进行了比较。试验结果可为大型厚壁弯头的设计,制造及使用提供参考数据。     

水管理策略对土壤水盐动态和区域地下排水影响的模拟评价

以宁夏惠农灌区平罗试验区为对象，基于田间观测与灌溉试验结果，在田间尺度采用SWAP模型开展不同地下水调控深度与灌溉制度相结合的水管理方案下土壤水盐动态的模拟，在区域尺度采用MODFLOW模型进行不同水管理方案对区域地下排水量影响的模拟评价，据此分析土壤水盐动态过程和农田排水系统的作用，对拟定的各种水管理方案进行评价。结果表明，现状灌溉用水量虽有助于减少表土盐分积聚，但地下排水量占灌溉用水量的39．4％；现状灌溉用水量减少50％时，浅埋地下水位会加重表土积盐；现状灌溉用水量减少25％时，作物根区没有产生明显的积盐，地下排水量减少31．4％。因此，较为合理的水管理方案是将现状灌水量减少25％的同时将地下水埋深控制在70cm以下，才能达到节水、增产、改善农田水土环境的目标。     

Synthesis and characterization of poly(N‐vinyl‐2‐pyrrolidone) grafted sodium alginate hydrogel beads for the controlled release of indomethacin

Graft copolymers of sodium alginate (NaAlg) with N‐vinyl‐2‐pyrrolidone were prepared using azobisisobutyronitrile as initiator. The graft copolymers (NaAlg‐g‐PVP) were characterized with Fourier transform infrared spectroscopy, elemental analysis, and differential scanning calorimetry. Polymeric hydrogel beads of NaAlg and NaAlg‐g‐PVP were prepared by crosslinking method using glutaraldehyde (GA) as a crosslinker in the hydrochloric acid catalyst (HCl) and these beads were used to deliver anti‐inflammatory drug, indomethacin (IM). Chemical stability of the IM after encapsulation into beads was confirmed by FTIR. Preparation conditions of the NaAlg‐g‐PVP beads were optimized by considering the percentage entrapment efficiency, particle size, swelling capacity and their release data. In vitro release studies were performed in simulated gastric fluid (pH 1.2) for the initial 2 h, followed by simulated intestinal fluid (pH 7.4) for 4 h. Effects of GA concentration, exposure time to GA, drug/polymer (d/p) ratio, and concentration of HCl on the release of IM were discussed. It was observed that IM release from the beads decreased with increasing GA concentration and exposure time. IM release also decreases with increasing d/p ratio and HCl concentration. The highest IM release was obtained to be 77% for beads crosslinked with 0.027M GA. Swelling experiments were also performed to compute molecular mass between crosslinks of the beads. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008     

Are Samples in Randomized Controlled Trials of Psychotherapy Representative of Community Outpatients? A New Methodology and Initial Findings.

To determine the extent to which published randomized controlled trials (RCTs) of psychotherapy can be generalized to a sample of community outpatients, the authors used a method of matching information obtained from outpatient charts to inclusion and exclusion criteria from published RCT studies. They found that 80% of the patients in their sample who had diagnoses represented in the RCT literature were judged eligible for at least 1 published RCT; however, 58% of the patients had primary diagnoses such as adjustment disorder or dysthymia, which were not represented in the existing psychotherapy outcome literature. The most common reasons that patients in their sample did not match with published RCTs for psychotherapy are listed, and the implications of these findings for research and practice are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)