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老年性上睑皮肤松弛矫正术后早期眼球散光的变化 被引量:3
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作者 窦仁慧 温淑梅 +2 位作者 俞晓宇 郭昊晨 廉恒丽 《中华眼视光学与视觉科学杂志》 CAS CSCD 2019年第7期549-552,共4页
目的:探讨老年性上睑皮肤松弛矫正术后早期患者眼球屈光状态的变化规律。方法:前瞻性队列研究。收集2016年7月至2017年12月就诊于温州医科大学附属眼视光医院杭州院区的老年性上睑皮肤松弛患者62例(124眼),其中40例(80眼)接受手术治疗... 目的:探讨老年性上睑皮肤松弛矫正术后早期患者眼球屈光状态的变化规律。方法:前瞻性队列研究。收集2016年7月至2017年12月就诊于温州医科大学附属眼视光医院杭州院区的老年性上睑皮肤松弛患者62例(124眼),其中40例(80眼)接受手术治疗为治疗组,22例(44眼)暂未接受手术治疗为对照组,治疗组于术前及术后3个月检查,对照组初查及3个月后复查,均进行最佳矫正视力、屈光度数、角膜曲率和中央角膜厚度的测量。组内比较采用配对t检验或秩和检验;组间比较采用协方差分析。结果:治疗组上睑皮肤松弛矫正术后,患眼散光量下降0.17D,与术前比较差异有统计学意义(t=-3.31,P<0.001);矫正视力、球镜度数、角膜曲率和角膜厚度在手术前后比较差异均无统计学意义。对照组初查及3个月后复查各指标之间差异均无统计学意义。以术前散光度数作为协变量,术后散光度数作为评价指标,2组组间均值比较差异有统计学意义(F=13.672,P<0.001),2组间视力、球镜度数、角膜曲率、角膜厚度比较差异均无统计学意义。结论:上睑皮肤松弛矫正术后早期眼球散光度数降低,散光性质无明显变化。 展开更多
关键词 上睑皮肤松弛 屈光 手术
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A two-layer low-carbon economic planning method for park-level integrated energy systems with carbon-energy synergistic hub
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作者 Yunfei Mu haochen guo +3 位作者 Zhijun Wu Hongjie Jia Xiaolong Jin Yan Qi 《Energy and AI》 2024年第4期291-308,共18页
Building a low-carbon park is crucial for achieving the carbon neutrality goals.However,most research on low-carbon economic planning methods for park-level integrated energy systems(PIES)has focused on multi-energy f... Building a low-carbon park is crucial for achieving the carbon neutrality goals.However,most research on low-carbon economic planning methods for park-level integrated energy systems(PIES)has focused on multi-energy flow interactions,neglecting the“carbon perspective”and the impact of the dynamic coupling characteristics between multi-energy flows and carbon emission flow(CEF)on carbon reduction and planning schemes.Therefore,this paper proposes a two-layer low-carbon economic planning method for park-level integrated energy systems with carbon-energy synergistic hub(CESH).Firstly,this paper establishes a CESH model for PIES to describe the synergistic relationship between CEF and multi-energy flows from input,conversion,storage,to output.Secondly,a PIES two-layer low-carbon economic planning model with CESH is proposed.The upper model determines the optimal device types and capacities during the planning cycle.The lower model employs the CESH model to promote carbon energy friendly interactions,optimize the daily operation scheme of PIES.The iterative process between the two layers,initiated by a genetic algorithm(GA),ensures the speed and ac-curacy.Finally,case studies show that,compared to planning methods without the CESH model,the proposed method is effective in reducing carbon emissions and total costs during the planning cycle.From a dual“carbon-energy”perspective,it enhances investment effectiveness and carbon reduction sensitivity by deeply exploring the energy conservation and carbon reduction potential of PIES. 展开更多
关键词 Park-level integrated energy system(PIES) Low-carbon economic planning Carbon-energy synergistic hub(CESH) Carbon energy friendly interactions Carbon trading market
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