准稳态灵敏度方法在节点边际电价计算中的应用

在考虑电力系统动态功率频率特性的基础上,采用整步功率系数,来求得发电机组用于分摊系统功率不平衡量的承担系数αnG,然后将其与准稳态灵敏度方法相结合,计算得到发电机功率转移因子GSDF。用此方法求得的GSDF因子不再依靠平衡节点,这也意味着节点边际电价的阻塞分量与平衡节点的选择无关,从而可以向市场参与者收取合理的阻塞费用。最后对IEEE30节点系统进行了仿真计算,结果说明本方法是可行的。

不同能量等离子消融术治疗慢性肥厚性鼻炎疗效观察

目的 探讨不同能量等离子消融术治疗慢性肥厚性鼻炎患者的临床效果.方法 将80例慢性肥厚性鼻炎患者按随机数字表法分为A组、B组、C组、D组,每组20例,分别给予2档、3档、4档、5档输出能量行等离子消融术治疗,术后随访6个月.治疗前后采用鼻阻塞视觉模拟评分法评定鼻塞症状及临床疗效.结果 术后1个月、6个月4组患者视觉模拟评分法评分均较术前及术后显著下降(P<0.05),且C组、D组评分显著低于A组、B组(P<0.05);C组(90.0％)、D组(95.0％)治疗有效率显著高于A组(65.0％)、B(70.0％)(P<0.05).结论 等离子消融术治疗慢性肥厚性鼻炎时,不同输出能量治疗效果不同,4档、5档能量治疗效果最佳.

Numerical Analysis of a Blocking Mass Attenuating Wave Propagation

Based on wave theory, blocking mass impeding propagation of flexural waves was analyzed with force excitation applied on a ship pedestal. The analysis model of a complex structure was developed by combining statistical energy analysis and the finite element method. Based on the hybrid FE-SEA method, the vibro-acoustic response of a complex structure was solved. Then, the sound radiation of a cylindrical shell model influenced by blocking mass was calculated in mid/high frequency. The result shows that blocking mass has an obvious effect on impeding propagation. The study provides a theoretical and experimental basis for application of the blocking mass to structure-borne sound propagation control.

阻塞性睡眠呼吸暂停综合征患者鼻阻塞及口咽部的调查研究

目的应用鼻阻塞评分（nasal obstruction symptomevaluation，NOSE）及Mallampati评分（MS）评估阻塞性睡眠呼吸暂停综合征（obstructive sleep apnea syndrome，OSAs）患者鼻阻塞及口咽部情况，及相关影响因素，探讨NOSE评分及MS评分能否作为OSAS简单初筛诊断方法及危险度评估的方法。方法应用NOSE评分量表及MS评分对74例OSAS患者进行问卷调查，常规鼻腔检查，多导睡眠仪监测（PSG），记录体质量指数（BMI），所得结果进行统计分析。结果①NOSE评分与夜间睡眠呼吸紊乱指数（AHl）呈正相关（P〈0．01），与夜间平均血氧和最低血氧呈负相关（P〈0．01）；MS评分与BMI、夜间AHI呈正相关（P〈O．01），与夜间平均血氧和最低血氧呈负相关（P〈0．01）。②NOSE评分与MS评分均高者夜间AHI更高。③NOSE评分与鼻中隔偏曲、下鼻甲肥大、过敏性鼻炎有相关性；AHI与鼻中隔偏曲、下鼻甲肥大有相关性，与过敏性鼻炎无相关性。结论在OSAS患者的评估中，既往靠PSG、ESS评分等了解患者的气道阻塞程度，但对具体阻塞部位不能由此做出判断。本文采用NOSE、MS评分，可以弥补相关不足，更好了解其主要阻塞部位，有较重要的临床意义，值得进一步探讨及研究。NOSE评分可作为OSAS患者鼻部情况的初筛方法，MS评分可评估其口咽部情况，NOSE评分与MS评分越高，0sAs患者相对危险率越高；OSAS患者增加了鼻腔结构（鼻中隔偏曲、下鼻甲肥大）改变的比例。临床上应重视评估OSAS患者鼻阻塞症状及口咽部情况，对其进行相关的健康教育及外科手术或呼吸机等治疗，提高患者的生活质量。

Effect of Yiqibushenhuoxue decoction on chronic obstructive pulmonary disease measured by St. George's respiratory disease questionnaire scores and forced expiratory volume

OBJECTIVE: To investigate the effects of Yiqibushenhuoxue decoction on stable chronic obstructive pulmonary disease(COPD) by observing its influences on patients' quality of life and airway inflammation.METHODS: Seventy patients with stable COPD were randomly divided into a treatment group(n=35) treated with Yiqibushenhuoxue decoction plus Seretide and a control group(n=35) treated with Seretide only.The dosage of Yiqibushenhuoxue decoction was 100 mL each time, twice a day, and the dosage of Seretide was salmeterol 50 μg/fluticasone 250 μg twice a day. Both groups were treated for 12 weeks. Before and after the treatment, St George's respiratory disease questionnaire(SGRQ)scores,forced expiratory volume,and forced expiratory volume in 1 second/forced vital capacity(FEV1/FVC)were measured.RESULTS:The SGRQ scores in both groups were significantly lower than those before treatment(P<0.05). After treatment, the total SGRQ scores and each subscore in the treatment group were significantly lower than those in the control group(P<0.05). The percentage of the predicted FEV1% and FEV1/FVC were higher in both groups, but no statistical differences were detected from before to after the treatment or between the two groups(P>0.05).CONCLUSION: Yiqibushenhuoxue decoction could significantly decrease the SGRQ scores in patients with stable COPD, which suggests that it is able to improve patient symptoms.