Arrangement of Multirow Solar Collector Array on Limited Roof Width

At the limited roof north-south （N-S） width of a building, for the array with multirow collectors based on no shading at winter solstice noon and sloped at latitude, this paper studied the shading and the radiant energy striking on solar collector array. Based on Kunming solar radiation data, the annual and monthly solar radiant energy striking on multi-array collectors was analyzed and estimated, from no shading to partial shading by adding 1-3 collector row, at the slopes of 10°, 15°, 20°, 25°, 30°, 35° and 40°, respectively. The results showed that properly increasing the row number by reducing the slope of collectors was reasonable in order to get more annual radiant energy. Adding 1 row at 10° of slope was economical for Kunming, based on the 5-row array at 25°. And adding collector row by 20% at 10° of slope could increase the radiant energy striking on the array by 19%.

选择性痔上黏膜环切术对直肠内套叠的临床疗效观察

目的分析选择性痔上黏膜环切术(TST)对直肠内套叠造成的出口梗阻性便秘的临床疗效。方法收集聊城市人民医院肛肠外科于2013年1月至2015年1月期间收治的200例直肠内套叠的临床资料,根据术式分为选择性痔上黏膜环切术(TST)组(n=100)和痔上黏膜环切钉合术(PPH)组(n=100),比较两组患者的临床疗效及住院时间,同时对术后疼痛、尿潴留、出血、肛门坠胀、吻合口狭窄等并发症的发生情况进行比较。结果TST组与PPH组患者有效率分别为81%和79%,差异无统计学意义(χ^2=0.13,P>0.05);TST组患者住院时间明显少于PPH组(χ^2=35.24,P<0.01);除术后6小时以外,TST组术后疼痛(χ^224 h=5.71,χ^248 h=5.38,χ^272 h=7.73;P<0.05)、尿潴留(χ^2=9.28,P<0.05)、出血(χ^2=7.04,P<0.01)、肛门坠胀(χ^2=23.86,P<0.01)、吻合口狭窄(χ^2=23.46,P<0.01)等并发症的发生率均明显低于PPH组,比较差异有统计学意义。结论TST治疗直肠内套叠临床疗效显著,且住院时间短,术后并发症少。