填埋场封场土地沉降特性分析与模拟研究

通过对上海老港填埋场49号填埋单元进行的地面沉降监测,分析堆体沉降机理,建立了反映填埋场沉降特性的数学模型,结果表明:垃圾堆体在监测期内平均表面沉降量77.62 mm,沉降速率约为0.174 mm/d,模型预测监测堆体最终沉降量约为122 cm,未来5 a内还将有约7.9 cm沉降。     

数字切片扫描仪产品主要性能指标的检验方法初探

数字切片扫描仪产品按照医疗器械进行管理,管理类别为Ⅱ类。本文依据日常检验工作要求,归纳总结出一套现实可行的,针对数字切片扫描仪产品主要性能指标的检验方法,以期规范和指导该类产品的检验。     

Development of microsatellite markers for the critically endangered frog Telmatobufo bullocki and cross-species amplification in two related species

Fifteen microsatellite markers were developed for Telmatobufo bullocki, a critically endangered frog species from Chile. Genetic diversity that was assessed in 29 individuals from one location showed 3–19 alleles per locus. These markers were then tested for cross-species amplification in two related and similarly threatened species. The markers will be used in genetic studies aiding the management and conservation of T. bullocki.     

Microwave coagulation therapy and drug injection to treat splenic injury

Background

The present study compares the efficacy of 915- and 2450-MHz contrast-enhanced ultrasound (CEUS)–guided percutaneous microwave coagulation with that of CEUS-guided thrombin injection for the treatment of trauma-induced spleen hemorrhage.

Materials and methods

In a canine splenic artery hemorrhage model with two levels of arterial diameter (A, <1 mm and B, between 1 and 2 mm), hemostatic therapy was performed using 915- and 2450-MHz microwaves and drug injection. Therapy efficacy was measured by comparing bleeding rate, hemostatic time, bleeding index, bleeding volume, and pathology.

Results

The most efficient technique was CEUS-guided 915-MHz percutaneous microwave coagulation therapy in terms of action time and total blood loss. The success rate of the 915-MHz microwave group was higher than that of the 2450-MHz microwave and the drug injection groups (except A level, P < 0.05). Hemostatic time, bleeding index, and bleeding volume were significantly less in the 915-MHz microwave group than those in the 2450-MHz microwave and drug injection groups (P < 0.05). Obvious degeneration and necrosis of parenchyma and large intravascular thrombosis were observed in the cavity of larger vessels in the 915-MHz microwave group, but pathologic changes of light injury could be seen in the other groups.

Conclusions

The present study provides evidence that microwave coagulation therapy is more efficient than thrombin injection for the treatment of splenic hemorrhage. Furthermore, treatment with 915-MHz microwaves stops bleeding more rapidly and generates a wider cauterization zone than does treatment with 2450-MHz microwaves.     

风电项目光影影响分析方法

风电作为一种清洁能源,是近年来国家鼓励发展的能源项目,以往主要分布在人烟稀少地区,但随着规模的发展,部分风电场区已经涉及到零星居民居住地,随之而来的光影影响不可忽视。