HP6890色谱柱用于环境空气中微量恶臭硫化物的检测

利用HP6890型气相色谱仪进行环境空气中微量恶臭硫化物分析,实验结果表明:分离效果、峰形都很好,实验采用4种柱箱初始温度及升温程序,分别由初始温度70℃升温至90℃、120℃、130℃及由初始温度150℃,最后升温至190℃,相应分析一个样品的时间依次为:130.515min、63.419min、56.359min及11.116min,样品分析时间大大缩短,可提高分析效率。     

东北地区玉米低温冷害综合指标研究

在以往对低温冷害指标研究的基础上，将低温冷害成分不同的发育阶段进行分析，结合发育期日数和初霜日研究等，讨论分析了东北地区玉米的低温冷害问题，提出一个玉米低温冷害综合指标。该指标生物学和农学意义明确，计算较为方便，便于在预报上的应用。     

黑龙江省暴雪天气分析和预报技术

分析表明，造成黑龙江省暴雪的低压天气系统不仅来自西北、偏西和偏南方向，而且还有在东北和日本海新生成的，其中又以西南和南来的居多；高空影响系统主要是低槽，其次是低涡，但降暴雪时多数是低涡；造成暴雪的锋面系统以暖锋和锢囚锋为最多。另外，从造成降水的成因和水平锋生这两个角度出发，给出了7个暴雪落区的温压场模型。850hPa温度、850hPa温度平流和拔海高度决定了降水（雨、雪）的性质。     

Specificity of Life Conditions for Commercial Invertebrates on Artificial Substrates in the Eutrophicated Amur Bay,the Sea of Japan

The consequences of anthropogenic impact on the water area of Amur Bay (the Sea of Japan) near Vladivostok include the eutrophication of coastal waters and littering with various objects used as artificial substrates, which protect sedentary animals from predators and contribute to the survival of their larvae. An indicator of eutrophication, the diatom Skeletonema costatum accounting for 81–96% of the total abundance of phytoplankton (Stonik and Selina, 1995), is consumed mainly by barnacles and the Pacific oyster. Thus, these animals gain an advantage in the colonization of artificial substrates. The results of the study suggest that eutrophication will lead to changes in the structure of the marine community.     

钢网壳抗火非线性有限元分析

通过两种方式研究钢网壳的抗火性能,其一是对火的分析及单个构件的抗火力学性能分析;其二是对钢网壳结构进行抗火分析,以结构具有一定的抗火时间为标准,通过模拟预测实际火灾特性和结构的非线性有限元分析,求得直到倒塌时的结构抗火全过程响应,从而确定结构的抗火性能及临界温度。并通过一个实际的算例进行了结构的倒塌分析,得到了一些结论,从而对其实际抗火能力有一个理性的了解和认识,为经济、科学的结构综合防火设计提供理论依据。     

围岩散热计算及壁面水分蒸发的处理

笔者采用湿度系数法对壁面水分蒸发进行了处理,对计算壁面处饱和空气含湿量的方法进行了改进,将饱和空气含湿量与温度的关系拟合为二次曲线;建立了在考虑壁面水分蒸发情况下解算巷道围岩温度场分布及围岩向风流的散热量的数学方程,并采用异步长有限差分法对其进行了数值模拟求解;解算出巷道壁面水分蒸发情况下围岩温度分布、壁面温度和围岩散热量的变化规律;并与将饱和空气含湿量与温度的关系拟合为线型关系曲线时的解算结果进行了对比,将饱和空气含湿量和温度之间的关系拟合为线性的计算结果存在一定的误差,通风时间越长,湿度系数越大,风流相对湿度越小,拟合为线性时计算出来的壁面温度和围岩散热量的误差越大。     

Micro calorimeter study on the thermal stability of lithium-ion battery electrolytes

With the extensive applications of lithium-ion batteries, many batteries explosion accidents were reported. The thermal stability of lithium-ion battery electrolyte could substantially affect the safety of lithium-ion battery. The C80 micro calorimeter was used to study the thermal stability of several commonly used organic solvents and electrolytes. The samples were heated in argon atmosphere and air atmosphere, respectively. The chemical reaction kinetics was supposed to fit by an Arrhenius law, then the self-accelerating decomposition temperature was calculated. It is found that most of the samples are stable in argon atmosphere while decomposing in air atmosphere, and the single organic solvent is more stable than the electrolyte generally.     

哈尔滨市短临天气预报研究

从短临预报的定义和内容出发，就短临预报业务系统流程、地面要素加密信息收集显示、多普勒雷达预警信息和预报指标、重大灾害性短临预报的气象要素信息／预警信息／预报指标及物理量、不稳定指数预警信息／预报指标及合并显示、卫星云图降水／冰雹估计、3h降水／温度预报方法、预报编辑系统设计等方面，阐述了哈尔滨市短临预报业务的建设过程及其开展的方式、方法。     

SIMULATED EFFECTS OF ALTERED SPILLWAY RELEASES ON THERMAL STRUCTURE AND KOKANEE GROWTH IN A COLORADO RESERVOIR1

ABSTRACT: In‐reservoir thermal and ecological effects of releasing some flows over the surface spillway at Blue Mesa Reservoir, Colorado, rather than routing all releases through the hypolimnetic outlet were evaluated using a calibrated and validated one‐dimensional thermal model (CE‐THERM) with a set of ecological models. Thermal model output indicated that surface water temperatures were influenced primarily by atmospheric conditions, but the release of warmer water over the spillway resulted in a thinner epilimnion and cooler metalimnetic water temperatures. Ecological model predictions indicated that spillway releases and associated temperatures resulted in lower growth rates for young‐of‐year (YOY) kokanee salmon (Oncorhynchus nerka) in the reservoir by up to 9 percent when compared with growth rates under baseline operations with no releases over the spillway. Kokanee growth rates were reduced under spillway release scenarios because lower temperatures not only affected metabolic rates, but limited the productivity of the zooplankton as well. Thus, altering the release regime with spillway discharges could have deleterious effects on Blue Mesa's YOY kokanee. However, in other reservoirs, distributing discharges among different elevations may provide managers with a mechanism to regulate temperatures to benefit species of concern that are facing challenges imposed by environmental conditions such as global warming.