用辛烷基硫醇单层保护Au纳米粒子制备CO氧化催化剂Au/γ-Al_2O_3

采用两相法合成出含活性组分Au的辛烷基硫醇单层保护Au纳米粒子(C8AuNPs)的正己烷溶胶,用"逐次浸润"法将C8AuNPs负载在γ-Al2O3上,经真空干燥及活化处理制得Au/γ-Al2O3催化剂.所制得的Au催化剂前体C8AuNPs/γ-Al2O3表面Au粒子平均粒径可控制在2-3nm范围内,且分布比较单一;催化剂活性评价600h后,其表面Au的粒径仍主要分布在2-4nm范围内;真空干燥温度影响Au催化剂的粒子尺寸和催化活性,随着真空干燥温度的提高,Au纳米粒子的粒径增大.将所制备的催化剂用于低温CO氧化反应,催化活性评价结果表明,经25℃真空干燥制得的2.5%(质量分数,w)Au/γ-Al2O3具有较高的活性和长期稳定性,其催化CO完全转化的最低温度为-19℃,在15℃下CO完全转化时Au/γ-Al2O3的单程寿命至少900h;4.0%(w)Au/γ-Al2O3在15℃和进料中含水条件下对CO完全氧化的单程寿命不低于2000h,可见催化剂具有强的抗潮湿中毒特性.综合上述实验结果,讨论了影响Au/γ-Al2O3催化剂活性的可能因素

Repatriation Adjustment and Intent of Retention

　　隨著台灣企業國際化程度的加深，派外人員的管理已成為國際人力資源管理的重要課題。而與派外相關的主題如：派外人員的遴選標準，派外前訓練課程的設計等，國內外已有諸多研究。因此本研究擬從返任時面對環境轉換所須調整幅度的角度探討我國企業派外人員返國留職意願之關係，期能達成以下研究目的。1.探討影響派外人員返任前心理預期之調整與返任後實際認知之調整的因素。2.了解派外人員返任前心理預期之調整與返任後實際認知之調整對其返任後留職意願之影響如何3.根據1.2.之研究發現建議組織應採何種政策措施以減輕派外人員返國調適上的困擾及問題，以提高返任後之留職意願

Study on the effect of optimized Traditional Chinese Medicine nursing plan on defecation of patients after surgical treatment of mixed hemorrhoids (中医护理方案优化改善混合痔术后患者排便功能的效果研究)

Objective To investigate the effect of optimized Traditional Chinese Medicine(TCM) nursing plan on defecation of postoperative patients with surgical treatment of mixed hemorrhoids. Methods Expert consultation, Delphi method and document retrieval were used to optimize the TCM nursing program. Totally 416 patients with hospital admission date form January and December 2021 were included as control group, receiving standard nursing plan. Another 393 patients with hospital admission date form January and December 2022 were recruited as the study group, received optimized TCM nursing plan. Defecation condition at third day and fifth day after surgery, hospitalization cost of the patient and score of TCM nursing quality assessment were compared between groups. Results The score of Wexner Constipation Scoring System in the study group was lower than that in the control group at third day and fifth day after surgery (P＜0. 01). The hospitalization cost of the patient in the study group were less than that in the control group(P＜0. 01). The score of TCM nursing quality assessment in the study group was higher than that in the control group(P＜0. 05). Conclusion The optimized TCM nursing plan is effective to prevent postoperative constipation in patients with surgical treatment of mixed hemorrhoids. (目的 对混合痔中医护理方案进行优化, 探讨优化后的方案对患者术后排便功能的改善效果。方法 采用专家咨询、德尔菲法、文献查找等方法对混合痔中医护理方案中的护理措施进行优化。通过病例回顾的方法选取2021年1月—12月住院的患者416例为对照组, 按照标准方案进行护理; 将2022年1月—12月收治的患者393例纳入研究组, 按优化后的中医护理方案进行护理。对比两组患者术后第3天、第5天的排便功能, 统计住院费用, 评价护士中医护理工作质量。结果 研究组术后第3天、第5天Wexner便秘评分系统得分低于对照组, 差异有统计学意义(P＜0. 01)。研究组住院费用低于对照组, 差异有统计学意义(P＜0. 01)。研究组护士中医护理工作质量评分高于对照组, 差异有统计学意义(P＜0. 05)。结论 优化后的混合痔中医护理方案有效预防术后便秘的发生。

一种基于MEMS技术的可调谐光滤波器

文章介绍了一种基于微电子机械系统（MEMS）技术的可调谐光滤波器（TOF）,分析了其基本原理和光学结构,给出了合理的设计方案及所进行的实验验证。实验结果表明,该滤波器性能优良,20 dB带宽<0.65 nm,3 dB带宽<0.24 nm,整个光路的插损控制在2 dB以内。根据该方案设计的滤波器具有体积小、成本低和波长调谐范围大等特点,而且能实现窄带滤波,可以广泛用于光通信系统和传感领域