TD-40型低耗高效节能多通道长喉型射水抽气器在娘子关发电厂4号机的应用

该文简要介绍了娘子关发电厂TD 40型多通道长喉型射水抽气器的工作原理及特点,两种射水抽气器的性能试验对比,技术改造方案,投资费用及经济效益。

Research progress on the water vapor channel within the Yarlung Zsangbo Grand Canyon, China

The Second Tibetan Plateau Scientific Expedition and Research Program tasked a research team with the“Investigation of the water vapor channel of the Yarlung Zsangbo Grand Canyon(INVC)”in the southeastern Tibetan Plateau(TP).This paper summarizes the scientific achievements obtained from the data collected by the INVC observation network and highlights the progress in investigating the development of heavy rainfall events associated with water vapor changes.The rain gauge network of the INVC can represent the impacts of the Yarlung Zsangbo Grand Canyon(YGC)topography on precipitation at the hourly scale.The microphysical characteristics of the precipitation in the YGC are different than those in the lowland area.The GPM-IMERG(Integrated MultisatellitE Retrievals for Global Precipitation Measurement)satellite precipitation data for the YGC region should be calibrated before they are used.The meridional water vapor flux through the YGC is more important than the zonal flux for the precipitation over the southeastern TP.The decreased precipitation around the YGC region is partly due to the decreased meridional water vapor flux passing through the YGC.High-resolution numerical models can benefit precipitation forecasting in this region by using a combination of specific schemes that capture the valley wind and water vapor flux along the valley floor.

论伤寒厥证

目的:探讨《内经》经脉理论和"气水通道"理论用于解释《伤寒论》中厥证的可行性。方法:以"凡厥者,阴阳气不相顺接,便为厥。厥者,手足逆冷者是也"为伤寒厥证总纲,试用《内经》中十二经脉的循行分布特点,对厥证条文及方药进行分析,用"气水通道"理论解释部分条文,以揭示厥证的本质特征。结果:根据《内经》中十二经脉的循行分布分析厥证条文,能准确定位厥证条文中所对应的经脉与经脉间不相顺接点,同时,"气水通道"理论能更合理解释部分条文。结论:用《内经》经脉理论和"气水通道"理论能有效分析《伤寒论》中的厥证部分。

论伤寒三阳三阴

目的:探讨《伤寒论》三阳三阴辨证的本质特点。方法:根据相关论文中《伤寒论》母本为张仲景用《内经》论广《汤液》而成的结论,尝试对《汤液》的理论体系进行重构,并对《伤寒论》的三阳三阴内容进行《汤液》与《内经》双理论体系分析。结果:《汤液》三阳三阴有别于《内经》六经,《伤寒论》三阳三阴提纲及部分条文来源于《汤液》理论体系,而其余部分条文来源于《内经》理论体系。把三阳三阴内容划分为来源于《汤液》理论体系的汤液本证、来源于《内经》理论体系的内经经证和内经脏腑证,能有效清晰地对《伤寒论》进行解读与分析。结论:《伤寒论》三阳三阴由《汤液》和《内经》两个不同理论体系有机结合而成,对条文理论体系属性的分辨有助于全面理解三阳三阴的内容。

三焦经络窥探

笔者通过对老子“有之以为利，无之以为用”的思考，认为三焦、经络系统有形、可见，是由人体各部有形物质边界构成空位形成之网状的人体生命活动的气水通道。

Urban Air Quality Plans and Integrated Assessment Methodologies

The air quality directive （2008/50/EC （of the European Parliament and of the Council of 21 May 2008）） requires European Member States to design appropriate AQPs （air quality plans） for zones and agglomerations where the air quality does not comply with the limit values and to assess possible emission reduction measures to decrease concentration levels. The Portuguese agglomeration of Porto Litoral is one of the several European Union urban areas that had to develop and implement AQPs to reduce particulate matter （PM10）. The AQPs were initially designed based on a scenario approach and using an air quality model, which was applied over the study region for the reference situation with the current PM10 emissions, and for a reduction scenario with PM10 emissions re-estimated considering the implementation of abatement measures. Aiming to cost-efficiently optimize Porto Litoral PM10 abatement measures, the assessment procedure was repeated using an optimization approach based on the RIAT ＋ （regional integrated assessment tool ＋）. Porto Litoral urban area＇s technical and non-technical measures were characterized （including associated costs） and, through the application of the air quality model to 20 emissions abatement scenarios, S-R （source-receptor） relationships were created. This paper comparatively describes the air quality plans designed to improve PM10 levels in the Porto Litoral agglomeration based on both the scenario analysis and the optimization approach.

Optimization of Dimples in Microchannel Heat Sink with Impinging Jets-Part B： the Influences of Dimple Height and Arrangement

The combination of a microchannel heat sink with impinging jets and dimples(MHSIJD) can effectively improve the flow and heat transfer performance on the cooling surface of electronic devices with very high heat fluxes. Based on the previous work by analysing the effect of dimple radius on the overall performance of MHSIJD, the effects of dimple height and arrangement were numerically analysed. The velocity distribution, pressure drop, and thermal performance of MHSIJD under various dimple heights and arrangements were presented. The results showed that: MHSIJD with higher dimples had better overall performance with dimple radius being fixed; creating a mismatch between the impinging hole and dimple can solve the issue caused by the drift phenomenon; the mismatch between the impinging hole and dimple did not exhibit better overall performance than a well-matched design.

Optimization of Dimples in Microchannel Heat Sink with Impinging Jets Part A： Mathematical Model and the Influence of Dimple Radius

With increasing heat fluxes caused by electronic components, dimples have attracted wide attention by researchers and have been applied to microchannel heat sink in modem advanced cooling technologies. In this work, the combination of dimples, impinging jets and microchannel heat sink was proposed to improve the heat transfer performance on a cooling surface with a constant heat flux 500 W/cm2. A mathematical model was ad- vanced for numerically analyzing the fluid flow and heat transfer characteristics of a microchannel heat sink with impinging jets and dimples （MHSIJD）, and the velocity distribution, pressure drop, and thermal performance of MI-ISIJD were analyzed by varying the radii of dimples. The results showed that the combination of dimples and MHSIJ can achieve excellent heat transfer performance; for the MHSIJD model in this work, the maximum and average temperatures can be as low as 320 K and 305 K, respectively when mass flow rate is 30 g/s; when dimple radius is larger than 0.195 mm, both the heat transfer coefficient and the overall performance h/AP of MHSIJD are higher than those of MHSIJ.

Performance analysis of quantum key distribution based on air-water channel

Considering the air-water interface and ocean water’s optical attenuation,the performance of quantum key distribution(QKD)based on air-water channel is studied.The effects of photons’various incident angles to air-water interface on quantum bit error rate(QBER)and the maximum secure transmission distance are analyzed.Taking the optical attenuation of ocean water into account,the performance bounds of QKD in different types of ocean water are discussed.The simulation results show that the maximum secure transmission distance of QKD gradually reduces as the incident angle from air to ocean water increases.In the clearest ocean water with the lowest attenuation,the maximum secure transmission distance of photons far exceeds the the working depth of underwater vehicles.In intermediate and murky ocean waters with higher attenuation,the secure transmission distance shortens,but the underwater vehicle can deploy other accessorial methods for QKD with perfect security.So the implementation of OKD between the satellite and the underwater vehicle is feasible.