Effects of Online Comments on Smokers' Perception of Antismoking Public Service Announcements

On YouTube antismoking PSAs are widely viewed and uploaded; they also receive extensive commentary by viewers. This study examined whether such evaluative comments with or without uncivil expressions influence evaluations by subsequent viewers. Results showed PSAs with positive (i.e. antismoking) comments were perceived by smokers as more effective than PSAs with negative (prosmoking) comments. Smokers in the no‐comment condition gave the highest perceived effectiveness score to PSAs. Smokers' readiness to quit smoking moderated the effect of comments on PSA evaluation. Smokers reading negative uncivil comments reported more negative attitude toward quitting and a lower level of perceived risk of smoking than those reading negative civil comments but positive civil and positive uncivil comments did not elicit different responses.     

PLC在变压吸附系统中的设计与实现

提出了以FX2N128MR超小型可编程控制器为核心,构建PSA硬件系统的设计方案,实现了制氢生产中变压吸附装置的开关量输入、输出和报警联锁控制。在工艺时序表和硬件系统基础上进行编程,实现了对现场的过程控制。     

H2O2-铁炭法预处理冷轧带钢厂镀锡废水

冷轧厂电镀锡生产过程中产生的废水含有大量的有机物,COD浓度高,pH值在1.1～2.0之间,很难直接进行生化处理.为提高生化处理效果,以H2O2-铁炭柱-pH调节-混凝为处理工艺进行前处理,结果表明,空速为3 h-1、H2O2/COD为1.5(质量比)、pH为8左右、PAM加入量为15 mg/m3时处理效果最好.利用该方法处理冷轧厂镀锡废水,可有效降低COD的浓度, Sn2 被氧化成高价态后沉淀除去,为废水进入后续的生化处理提供了保障.     

概率安全分析的发展及应用展望

对于核动力厂,概率安全分析(PSA)是评价风险、认识风险和管理风险的有效工具.本文介绍了PSA技术在国内及国际上发展和应用情况,并结合我国实际对PSA的发展应用进行了一些展望.     

前列腺特异性抗体电化学免疫传感器的研制

利用自组装的方法在金电极上制得巯基丁二胺铜(Ⅱ)/纳米金胶/前列腺特异性抗体(抗PSA)免疫修饰电极。用该修饰电极对PSA进行检测,发现其循环伏安图的氧化还原峰电流都随PSA浓度的增高而降低,峰电位没有变化。其最佳实验条件包括:pH5.2的0.1mol/L磷酸盐缓冲液作为底液,以及用示差脉冲方式进行定量测定。结果显示:该传感器的氧化峰电流减少值与PSA浓度在0.005-0.48μg/mL范围内成线性关系,检测下限为2ng/mL.在40 ng/mLPSA浓度下八次测量相对标准偏差为2.9%,该免疫传感器的稳定性和抗干扰性都较好。对血清中的PSA进行检测,获得满意的结果。     

Kinetic and characterization of UV-curable silicone urethane methacrylate in semi-IPN-structured acrylic PSAs

To improve the thermal stability of general acrylic pressure-sensitive adhesives (PSAs), polydimethylsiloxane (PDMS) was used and UV curing was employed. Silicone urethane methacrylate (SiUMA) was synthesized and introduced into acrylic PSAs for a semi-interpenetrating polymer network structure. The structure of the SiUMA was investigated through C NMR, H NMR, and FT-IR. The kinetics and behaviors of SiUMA (S1) were found by adding photoinitiators (PI) of 0.5, 1.0, 5.0, and 10?phr in a binder, which were examined using the photo-DSC (pDSC). After setting PI as 5.0?phr in a binder and UV intensity as 1000?mJ/cm², the SiUMA, which was prepared by a radical polymerization, was added to acrylic PSA to 20, 40, 60, and 80% composition, and its kinetics and behaviors were analyzed by pDSC. Finally, the peel strength was checked to evaluate adhesion performance of the acrylic PSAs. The reaction rate was increased with increasing amounts of S1 and PI. Peel strength was dropped sharply with increasing crosslinking density.     

高固含量低粘度丙烯酸乳液压敏胶研制

运用特殊的表面活性剂以及在乳化过程中补加乳化剂的聚合方法 ,制备了固含量 70 %以上 ,粘度3 0 0～ 5 0 0mPa·s,多元粒径分布的丙烯酸乳液压敏胶 ,并对其贮存期、性能和干燥速度进行了考查。     

血清BAP和PSA测定在前列腺癌骨转移诊断中的价值

我们分析、比较了骨源性碱性磷酸酶(BAP)和前列腺特异抗原(PSA)对前列腺癌骨转移的诊断意义,并探讨了二者在前列腺癌骨转移分级中的应用价值。对68例前列腺癌病人进行骨显像,根据骨显像结果及临床表现分为骨转移组与非骨转移组。骨显像依Soloway分级标准分为五级(M0—M4)。对所有病人进行血清BAP与PSA检测,各组之间BAP值及PSA值比较采用t检验。对转移级别的升高与BAP值之间进行相关分析。结果显示骨转移的级别升高与BAP呈正相关。(r=1.1083,P<0.01)。PSA仅在M0与M1—M3之间有显著差异。BAP对前列腺癌骨转移最佳检测范围为25—35u/L,阳性预测率为96.6%,阴性预测率为75%。BAP与PSA值分别为35u/L和20ng/mL时,骨转移阳性预测率为97.5%。BAP与PSA值分别为25u/L和20ng/mL时,阴性预测率达73.9%。由此我们得出:1.BAP预测前列腺癌骨转移比PSA有效,并且BAP对前列腺癌骨转移的分级有诊断价值;2.BAP与PSA联合应用可提高前列腺癌病人骨转移的阳性预测率。     

吸附法产品氢纯度和收率的研究

本文探讨了中国神马集团尼龙66盐公司制氢装置的变压吸附气体分离的机理,通过试验,找出了运行方式与回收率的关系以及吸附压力、真空度、吸附时间对产品氢纯度的影响,确定了对产品氢的纯度和收率起主要作用的工艺参数,并选定了合适的操作条件,使得产品氢纯度达到了99.9%以上,产品氢的收率增至85%以上。     

Integrating Safety Critical Software System in Probabilistic Safety Assessment

In the recent times, computer-based systems are frequently used for protection and control of Nuclear Power Plants (NPPs). In the conventional Probabilistic Safety Assessment (PSA), the contribution from software in these computer-based systems was not given necessary attention. However, from operating experience, it has been found failures in such systems can also result in initiating events that have the potential for leading into Core Damage in the event of unavailability of the respective Engineered Safety Features. The impact of a typical computer-based system on PSA of Indian Nuclear Power Plant is demonstrated.