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Soil remediation of degraded coastal saline wetlands by irrigation with paper mill effluent and plowing

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Journal of Forestry Research 2012年第2期23卷 267-274页

作者： XIAMeng-jing liu zhi-mei LU Zhao-hua Institute of Restoration Ecology School of Chemical and Environ-mental Engineering China University of Mining and Technology Bei-jing 100083 China Chongqing Institute of Green and Intelligent Technology ChineseAcademy of Sciences. 85 Jinyu Road Yubei District Chongqing410022 China. Key Lab of Eco-environmental Science for Yel-low River Delta in Shandong Province Binzhou Shandong 256600China. E-mail： luzhaohua@***.

Combined with anti-waterlogging ditches, irrigation with treated paper mill effluent （TPME） and plowing were applied in this study to investigate the effects of remediation of degraded coastal sa- line-alkaline wetlands. Three treatments were employed, viz., control （CK）, irrigated with 10 cm depth of TPME （I）, and plowing to 20 cm deep before irrigating 10 cm depth ofTPME （IP）. Results show that both I-treatment and IP-treatment could improve soil structure by decreasing bulk density by 5% and 8%. Irrigation with TPME containing low salinity stimulated salts leaching instead of accumulating. With anti-waterlogging ditches, salts were drained out of soil. Irrigation with 10 cm depth of TPME lowered total soluble salts in soil and sodium adsorption ration by 33% and 8%, respective!y, but there was no significant difference compared with CK, indicating that this irrigation rate was not heavy enough to remarkably reduce so!l salinity and sodicity, Thus, in-i： gation rate should be enhanced in order to reach better effects of desalinization and desodication. Irrigation with TPME significantly increased soil organic matter, alkali-hydrolyzable nitrogen and available phosphorus due to the abundant organic matter in TPME. Plowing increased soil air circulation, so as to enhance mineralization of organic matter and lead to the loss of organic matter; however, plowing significantly improvedsoil alkali-hydrolyzable nitrogen and available phosphorus. Improvements of physicochemical properties in I-treatment and IP-treatment both boosted soil microbial population and activity. Microbial biomass carbon increased significantly by 327% （I-treatment） and 451% （IP-treatment）, while soil respiration increased significantly by 316% （I-treatment） and 386% （IP-treatment）. Urease and dehydrogenase activities in both I-treatment and IP-treatment were significantly higher than that in CK. Phosphatase in IP-treatment was significantly higher than that in CK. Compared to I-treatment, IP-trea

关键词： anti-waterlogging ditches degraded saline-alkaline wetlands plowing remediation soil property treated paper mill effluent

Numerical Simulation and Experimental Study of Underwater Compound Structures Containing Honeycomb Interlayer

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International Journal of Plant Engineering and Management 2008年第4期13卷 181-190页

作者： liu zhi-hong SHENG mei-ping WANG Min-qing College of Marine Engineering Northwestern Polytechnical University Xi'an Shaanxi 710072 P.R. China

Honeycomb interlayer structure sound wave transferring theory of infinite is introduced into the underwater noise control. Based on the layered elastic or viscoelastic medium, the sound insulation property of a normal incidence plane wave on underwater honeycomb interlayer structure is studied by using the method of the transfer matrix and percentage distribution of sound energy in As a particular kind of complex multilayered rubber compound structures, honeycomb different areas. compound structure has better sound insulation property than rubber interlayer with cylindrical cavities compound structure. Simulation results show that the property of rubber material has great effect on structural sound insulation. Soft and small Poisson＇ s ratio rubber can obviously improve sound insulation performance of the whole structure. Furthermore, the material property of the face layer of the honeycomb interlayer structure has greater effects on the insulation performance. To validate the theoretical analysis, large samples of freedom-field measurement of honeycomb sandwich compound structure is carried out in the anechoic water tank of our university. The measurement result is in good agreement with the theoretical prediction.

关键词： sound insulation honeycomb interlayer underwater compound structure

Evaluation model of the grey fuzzy on eco-environment vulnerability

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Journal of Forestry Research 2007年第3期18卷 187-192页

作者： SHI Qing LU Zhao-hua liu zhi-mei MIAO Ying XIA Meng-jing Institute of Restoration Ecology China University of Mining and Technology （Beijing） Beijing 100083 P. R. China

The basic theory and evaluation index system of eco-environment vulnerability were reviewed. Based on the grey theory and fuzzy mathematics, a new comprehensive evaluation method from qualitative to quantitative, called grey-fuzzy evaluation, was proposed for evaluating eco-environment vulnerability. It was integrated of Association for Healthcare Philanthropy （AHP）, grey correlation analysis, grey statistics and fuzzy judgment. The constitutional principle and method of the new evaluation method were given and its feasibility and effectiveness were proved by the practical example.

关键词： Eco-environmental vulnerability Grey theory Fuzzy mathematics Comprehensive evaluation

藻酸盐敷料和明胶海绵敷料对老年患者PICC置管后渗血及感染的护理效果

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中华医院感染学杂志 2023年第19期33卷 3033-3036页

作者： [] 杭州师范大学附属医院门诊浙江杭州310015

目的探讨藻酸盐敷料和明胶海绵敷料对老年患者外周静脉穿刺中心静脉置管(PICC)后渗血和感染的护理效果.方法选取杭州师范大学附属医院2020年7月-2022年5月收治的214例PICC置管的老年患者,随机分为研究组和对照组,各107例;对照组PICC... 详细信息

目的探讨藻酸盐敷料和明胶海绵敷料对老年患者外周静脉穿刺中心静脉置管(PICC)后渗血和感染的护理效果.方法选取杭州师范大学附属医院2020年7月-2022年5月收治的214例PICC置管的老年患者,随机分为研究组和对照组,各107例;对照组PICC置管后采用明胶海绵护理,研究组采用藻酸盐护理,比较两组置管后不同时间渗血和感染情况;并归纳老年患者外周静脉穿刺PICC渗血的危险因素.结果两组患者在24、48、72、96 h内各时间段渗血的发生率差异无统计学意义;研究组患者渗血的程度较对照组轻(P<0.05);对照组首次换药时间早于研究组(P<0.05),96 h内换药频率高于研究组(P<0.05);年龄、凝血异常、合并糖尿病是老年患者PICC置管后渗血的危险因素(P<0.05);PICC置管后渗血患者发生感染7例,发生率30.43%,均为对照组,病原菌以表皮葡萄球菌为主.结论 PICC置管的老年患者采用明胶海绵和藻酸盐止血均有助于防治穿刺点渗血和感染,藻酸盐敷料更易减轻渗血程度和降低换药频率,降低感染风险;年龄、凝血异常、合并糖尿病是置管后穿刺点渗血的危险因素.

关键词：经外周静脉穿刺中心静脉置管藻酸盐敷料明胶海绵敷料渗血感染危险因素

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我国信用消费发展的瓶颈及对策研究

中国流通经济 2008年第11期22卷 35-38页

作者：刘志梅广东金融学院工商管理系广东广州510521

信用消费在微观上有助于消费者克服流动性约束,自由进行跨时期消费选择,实现家庭效用和福利的最大化;在宏观上是扩大居民有效需求,促进经济增长行之有效的手段。本文认为消费者观念滞后、商业银行对信用消费态度消极、法律与制度环境不... 详细信息

信用消费在微观上有助于消费者克服流动性约束,自由进行跨时期消费选择,实现家庭效用和福利的最大化;在宏观上是扩大居民有效需求,促进经济增长行之有效的手段。本文认为消费者观念滞后、商业银行对信用消费态度消极、法律与制度环境不利以及宏观经济环境具有较大不确定性等四方面因素是制约我国信用消费发展的瓶颈。为了促进信用消费发展,应培育居民合理的信用消费方式,提高其个人消费信贷的积极性,完善个人资信体系和社会信用机制,保持宏观经济快速发展。

关键词：信用消费消费信贷瓶颈路径选择

新型复合沟道Al_(0.3)Ga_(0.7)N/Al_(0.05)Ga_(0.95)N/GaN HEMT低相位噪声微波单片集成压控振荡器(英文)

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红外与毫米波学报 2007年第4期26卷 241-245页

作者：程知群蔡勇刘杰周玉刚刘稚美陈敬杭州电子科技大学微电子CAD研究所浙江杭州310018 香港科技大学电子与计算机工程系

设计并研制了一种新型复合沟道Al0.3Ga0.7N/Al0.05Ga0.95N/GaN HEMT(CC-HEMT)微波单片集成压控振荡器(VCO),且测试了电路的性能。CC-HEMT的栅长为1μm,栅宽为100μm。叉指金属-半导体-金属(MSM)变容二极管被设计用于调谐VCO频率。为提... 详细信息

设计并研制了一种新型复合沟道Al0.3Ga0.7N/Al0.05Ga0.95N/GaN HEMT(CC-HEMT)微波单片集成压控振荡器(VCO),且测试了电路的性能。CC-HEMT的栅长为1μm,栅宽为100μm。叉指金属-半导体-金属(MSM)变容二极管被设计用于调谐VCO频率。为提高螺旋电感的Q值,聚酰亚胺介质被插入在电感金属层与外延在蓝宝石上GaN层之间。当CC-HEMT的直流偏置为Vgs=-3V,Vds=6V,变容二极管的调谐电压从5.5V到8.5V时,VCO的频率变化从7.04GHz到7.29GHz,平均输出功率为10dBm,平均功率附加效率为10.4%。当加在变容二极管上电压为6.7V时,测得的相位噪声为-86.25dBc/Hz(在频偏100KHz时)和-108dB/Hz(在频偏1MHz时),这个结果也是整个调谐范围的平均值。据我们所知,这个相位噪声测试结果是文献报道中基于GaN HEMT单片VCO的最好结果。

关键词： Al0.3Ga0.7N/Al0.05Ga0.95N/GaN高电子迁移率晶体管微波单片集成电路压控振荡器相位噪声

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天然染料高粱红对柞丝绸的媒染性能研究

丝绸 2007年第5期44卷 29-31页

作者：刘治梅林杰辽东学院材料与化工学院辽宁丹东118003

分别以金属盐和有机酸为媒染剂,研究了天然染料高粱红对柞丝绸的预媒、后媒法染色性能。结果表明,金属媒染剂和有机酸媒染剂对高粱红染料的染色性能均有所提高,其中金属媒染剂的效果较好,且后媒法好于预媒法。两种媒染剂对其牢度都有所... 详细信息

分别以金属盐和有机酸为媒染剂,研究了天然染料高粱红对柞丝绸的预媒、后媒法染色性能。结果表明,金属媒染剂和有机酸媒染剂对高粱红染料的染色性能均有所提高,其中金属媒染剂的效果较好,且后媒法好于预媒法。两种媒染剂对其牢度都有所提高。

关键词：高粱红天然染料金属媒染剂有机酸媒染剂柞丝绸

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污染环境中两种群竞争模型的轨线研究

数学的实践与认识 2007年第3期37卷 79-84页

作者：刘宇红刘志美广东海洋大学理学院广东湛江524088

讨论了污染环境中体内毒素浓度不同的两种群竞争模型,通过构造适当的L iapunov函数,研究了模型的轨线并且给出了轨线的位置.

关键词：竞争系统污染环境轨线

机械通气患者人工气道囊内压对呼气末正压的影响分析

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中国危重病急救医学 2009年第4期21卷 243-244页

作者：刘志梅仇成秀罗旭深圳市宝安区龙华人民医院中心ICU 广东518109

正压通气加呼气末正压（PEEP）通气策略是抢救危重患者特别是呼吸功能障碍患者的常用治疗方法，已被广泛应用于临床。气管导管气囊充气不仅保证了正压通气的有效实施，而且阻挡了口鼻咽部分泌物下行产生误吸导致的呼吸机相关性肺炎（VA... 详细信息

正压通气加呼气末正压（PEEP）通气策略是抢救危重患者特别是呼吸功能障碍患者的常用治疗方法，已被广泛应用于临床。气管导管气囊充气不仅保证了正压通气的有效实施，而且阻挡了口鼻咽部分泌物下行产生误吸导致的呼吸机相关性肺炎（VAP）发生^[1]。因此，人工气道管理中适宜的气囊压力在临床工作中具有重要意义。通过观察不同人工气道气囊内压力对PEEP的影响，

关键词：机械通气人工气道囊内压呼气末正压