Velocity与JSP技术在portlet开发中的研究及对比分析

深入研究了基于Jetspeed的两种portlet开发技术——Velocity与JSP技术,它们在portlet开发中各自的基于MVC的开发框架以及工作机制等,并从不同侧面,针对它们自身的优势和不足,通过个别的实例分析进行了较深入的对比研究。     

深部薄油层双阶梯水平井钻井技术

介绍了HDl—27H薄油层双阶梯水平井的设计和施工情况。该井合理地利用水平井钻井配套技术、小角度单弯马达配合MWD导向钻井技术控制井眼轨迹，水平段油层实钻井眼轨迹所有测点与设计井眼轨迹的垂深差都控制在0．5m以内，且测井解释油层穿透率100％，创造了利用常规MWD控制水平井井眼轨迹精度的记录。该井投产后取得了显著的经济和社会效益，为以后深部薄油层开发积累了经验。     

碳酸钾生产中吹脱除氨新工艺实验研究

在离子交换法生产碳酸钾的基础上,将原有蒸发除氨工艺改为真空加热吹脱除氨工艺.进行了常压加热除氨、真空加热除氨、常压加热吹脱除氨和真空加热吹脱除氨4种工艺方法的实验研究和比较.结果表明,在实验条件下离子交换液的温度、蒸氨时间、气相压力和吹脱气量等对铵离子的分解率有很大影响.真空加热吹脱除氨效果显著.     

Three‐dimensional time‐harmonic Green's functions for a triclinic full‐space using a symbolic computation system

Time‐harmonic Green's functions for a triclinic anisotropic full‐space are evaluated through the use of a symbolic computation system.This procedure allows evaluation of the Green's functions for the most general anisotropic materials. The proposed computational algorithms are programmed in a MATLAB environment by incorporating symbolic calculations performed using Maple Computer Algebra System. Extensive testing of the numerical results has been performed for both displacement and stress fields. The tests demonstrate the accuracy of the proposed algorithm in evaluating the Green's functions. Copyright © 2001 John Wiley & Sons, Ltd.     

屯兰矿无纸化办公OA系统的开发和应用

通过屯兰矿无纸化办公OA系统的开发和应用，创造一个集成的办公环境，提高工作效率，使所有的办公人员都在同一个桌面环境下一起工作，摆脱时间和地域的限制，实现协同工作与知识管理。使其有效地为领导决策提供支持、达到信息充分共享、无纸化办公、文档一体化管理、提高工作效率、规范企业管理、降低办公费用等目标。     

地下工程中逆作法的现状及发展趋势

本文根据国内外地下工程中逆作法施工的现状，分析研究了逆作法施工的优缺点，推荐并介绍了几种提高过作法施工质量的关键技术，总结并提出了逆作法发展的趋势。     

Inverse kinematics analysis and numerical control experiment for PRS-XY style hybrid machining tool

This paper analyzed the inverse kinematics for the new Parallel rotate slider-XY axes (PRS-XY) style hybrid machining tool and educed the five axes linkage inverse kinematics transform formula on the basis of the coordinates of the X, Y, Z, A and B virtual axes. The program for the PRS-XY style hybrid machining tool in accordance with the program manner for the common numerical control (NC) machine tool was made. The results of the experiments prove that the inverse kinematics transform formula is correct. Translated from Journal of Modern Manufacturing Engineering, 2006, (4): 33–35, 49 [译自: 现代制造工程]     

光纤式表面粗糙度测量仪的研制

本文论述了光纤表面粗糙度测量仪研制过程中关键问题的解决方法，对非线性特性的参数计算，零点漂移，信号噪声，不同加工表面特性差异的处理都给出了完美的解决方法。该仪器以光散射理论为测量原理，用光纤为传输媒介，并用单片机８０９８进行计算，数据处理和测量智能控制。     

Time-domain leaky modes on layered media: dispersioncharacteristics and synthesis of pulsed radiation

In a companion paper (see ibid., p.747-54, June 1993) studying short-pulse radiation from current elements in the presence of plane layered dielectric media, various alternatives for constructing the transient field in terms of spectral-domain wave functions are explored. Two distinctive synthesis options are structured around conventional time-harmonic and nonconventional time-dependent basis wave functions, respectively. To understand the characteristic properties of each, the frequency-wavenumber dispersion relation for the layered environment is explored here in detail. Especially interesting is the behavior of the nonconventional time-domain leaky modes, which exhibit anomalies not encountered in their conventional time-harmonic counterparts. An example is given of how these time-domain modal basis fields synthesize highly resolved short-pulse radiation from a source in a dielectric layer     

Microsomal epoxide hydrolase polymorphism and risk of spontaneous abortion

Fibrinopeptide B (M(r) 1552.58) was employed as a calibration compound for matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) post-source decay (PSD) fragment ion analysis in the negative mode. Experiments were performed by using both continuous and delayed extraction, with the maximum reflectron voltages being 30 and 21 kV, respectively. For comparison, a common positive ion PSD calibrant, ACTH(18-39) (M(r) 2466.7), was also employed with positive ion calibration constants being applied to negative ion spectra. Using fibrinopeptide B as the calibrant, the negative ion PSD results for angiotensin II (M(r) 1046.2), renin substrate tetradecapeptide (horse) (M(r) 1759.0), and the custom-synthesized peptide (K2G4)2 (M(r) 987.1) showed a factor of 1.5-2 improvement in absolute mass accuracy. Typical absolute mass-to-charge ratio accuracies were within +/- 1 Thompson and were achieved even when the peptide being analyzed was more massive than fibrinopeptide B. In addition, both calibrants showed increased accuracy when experiments were conducted in the delayed extraction mode. Other advantages of using fibrinopeptide B are its moderate cost and the ability to perform calibration and sample analysis for negative ion PSD under the same instrumental conditions.