丙烯酸酯复合防水卷材的开发和应用

介绍了丙烯酸酯复合防水卷材的组成、特点、生产工艺、技术指标、工程配套材料及施工要点。     

SBR改性沥青的低温性能评价

主要对三种国产基质沥青和六种丁苯橡胶(SBR)改性沥青进行了测力延度试验(FDT)、常规技术指标试验以及SHRP的动态剪切仪(DSR)和弯曲梁流变仪(BBR)试验，并且将FDT中采用的粘弹比、拉伸柔度、应变能等指标与沥青的当量脆点(T1．2)、以及损失模量、弯曲劲度模量(S)、斜率(m)相比较，结果显示FDT所选的三个评价指标与SHRP的评价指标有良好的相关性，从而说明了采用FDT对沥青结合料在老化、疲劳综合作用下的低温性能进行评价的经济合理性以及选择三个评价指标的可靠性。     

时域有限差分法分析数字信号传输线的耦合

超大规模数字电路的信号开关速度和集成度的提高，导致了信号波形变异和信号耦合问题，并要求用全波分析法才能给出准确结果。文中用时域有限差分法（FD－TD）分析了高速数字信号传输线的耦合特性，给出了经介质补偿后的结果。FD－TD方法中采用了完全匹配层（PML）吸收边界和电流源激励等最新研究结果。研究表明FD－TD方法是计算高速数字电路的有力工具。     

Angiotensin I-converting enzyme inhibitory activity of Acetes chinensis peptic hydrolysate and its antihypertensive effect in spontaneously hypertensive rats

Peptic hydrolysate with angiotensin I-converting enzyme (ACE) inhibitory activity was prepared from Acetes chinensis . The 3 kDa ultrafiltration filtrates (UF-IV) of the desalted hydrolysate exerted a potent ACE inhibitory activity with IC50 being 0.67 mg mL⁻¹. The fractions with molecular weight located between 611 and 240 Da achieved a total percentage of 63.6% in the UF-IV, with a mean peptide length of about 5.6–2.1. Gastrointestinal digestions were simulated on the hydrolysate and UF-IV and addressed their effect on the ACE inhibitory activity. The ACE inhibitory activity of the UF-IV could survive or be maintained in active form by simulated gastrointestinal digestion. Furthermore, the UF-IV exerted potent antihypertensive effect after oral administrations were given to spontaneously hypertensive rats (SHR) at a dose of 900 mg kg⁻¹ body weight. In conclusion, the UF-IV could serve as useful antihypertensive peptides in the prevention and treatment of hypertension and other associated disorders.     

乐滩水电站船闸设计

较全面介绍了乐滩水电站船闸的主要技术特征，船闸建筑物总体布置、输水系统、水工结构、金属结构、机电设备及附属设施、原型观测等方面的设计。特别对乐滩船闸的主要技术特点进行了概括和总结，为高水头船闸的设计提供参考和借鉴。     

周期性粘弹性复合圆柱壳的功率流

在振动和噪声控制工程中,人们广泛使用各种粘弹性阻尼材料,并将它们粘贴在结构上减少结构振动和噪声.本文研究在圆柱壳上周期性粘贴阻尼材料后,该复合圆柱壳中的波传播和功率流.分析结果表明阻尼层的刚度和损耗因子极大地影响圆柱壳中的波传播和功率流.对相同体积的阻尼材料,增加阻尼层的厚度可比增加阻尼层的长度更有利于减少功率流.     

类金刚石碳膜的结构特性与耐磨性能

采用双离子束增强沉积（IBED）和离子束直接沉积（IBD）技术，在CHn 能量为200~550eV和3～25keV范围内沉积的类金刚石薄膜具有光滑平坦的表面和非晶结构。X光电子谱和Raman光谱分析、以及显微硬度测量的结果表明，随着轰击离子能量的降低，薄膜的金刚石特性增强；在200～550eV能量范围内制备的DLC膜具有明显的sp3键特征和很高的显微硬度。沉积在GCr15钢上的DLC膜与GCr15钢的摩擦学对比实验表明，DLC膜具有很低的摩擦系数、比磨损率和高的抗磨损指数，这证明采用上述两种方法制备的DLC膜具有优良的抗摩擦磨损性能。     

基于模型的水下目标三维视觉信息复原

水下目标三维视觉信息复原是水下智能机器人（ＡＵＶ）感知环境信息、进行自主作业的关键技术。本文介绍了一种基于模型的复原方法，即通过检测目标边缘拟合轮廓，根据模型知识复原三维信息。该方法已经成功地导引ＡＵＶ进行了水下自主避障、自主剪缆、自主投掷等智能作业。     

热透镜显像现象研究

本文报导了弱探测光在热透镜介质中传播时出现的一种光感应现象。实验研究了探测光出射光斑中的暗斑与介质中热透镜的对应关系，并分析了该现象产生的机理。     

On the performance of tubular surface coils in nuclear magneticresonance imaging and spectroscopy

Surface coils are important devices in the clinical application of nuclear magnetic resonance imaging and spectroscopy (NMRIS) because they have higher signal-to-noise ratios than body or head coils in superficial regions. This paper describes our theoretical and experimental study of the performances of tubular surface coils, aiding the effective application of such coils to NMRIS. We present formulas for the RF magnetic (H₁) fields produced by tabular surface coils placed over layered media, and for the self- and loaded-impedances of these coils. The calculated results show the dependence of the coil performances on the coil design parameters and the characteristics of the sample under test. We include the calculated results for the H₁ field phase shifts in conductive samples