钼对低合金钢硝酸盐体系应力腐蚀的影响

以高风温热风炉用钢的沿晶应力腐蚀开裂问题为背景,研究了Ｍｏ对低合金钢在硝酸盐溶液中的应力腐蚀行为。结果表明,低合金钢中加入合金元素将使钢中贝氏体和／或珠光体含量增大,从而提高了材料的稳定性和抗ＳＣＣ耐蚀性。提出了低合金钢／硝酸盐溶液体系的“温度－钼含量－ＳＣＣ图”。     

光伏模组积灰与阴影特性分析及识别方法

针对光伏模组积灰与阴影特性识别问题,详细分析了积灰和阴影的光伏特性曲线差异,揭示了阴影光伏曲线的拐点时变特性。提出由特性曲线的拐点数量及电流电压特性条件共同构成训练模型的输入特征量,基于CatBoost算法训练积灰和阴影识别模型。最后,利用光伏模组实测数据对CatBoost算法、ID3和GA-BP算法训练出的识别模型进行性能分析和对比测试,结果表明基于CatBoost训练出的识别模型输入量区分性强、诊断精度高,极具工程应用价值。     

稀土肥料在日光温室栽培草莓上的应用研究

探讨了不同浓度的稀土肥料,分别用于日光温室栽培草莓（Ｆｒａｇａｒｉａａｎａｎａｓｓａ）的浸根及根外追肥,结果表明：定植时用２００－３００ｍｇ／ｋｇ浓度浸根;生长旺盛期、初花期、盛花期用３００－４００ｍｇ／ｋｇ浓度喷施,对草莓具有显著的增产效果。     

基于Access公路工程机械数据库开发

介绍了Ｗｉｎｄｏｗｓ９５／ＮＴ下的数据库管理与开发平台Ａｃｃｅｓｓ的特点,论述了如何利用ＯＬＥ等手段来提高工程数据库的开发效率与质量,并结合公路工程机械数据库的开发实例,完成了各类别公路机械数据库建立、事务关系处理、实时检测数据分析处理、网络管理等工作．     

关于Hadamard矩阵的若干结果

研究了著名的Ｈａｄａｍａｒｄ猜想,对任一正整数Ｋ,给出了４Ｋ×４Ｋ阶Ｈａｄａｍａｒｄ矩阵存在的一些必要条件。     

ze^z＋λ的动力系统

研究整函数族ｆλ（ｚ）＝ｚｅ＾ｚ＋λ（λ∈Ｃ）的动力系统。方法用Ｂａｋｅｒ研究ｅ＾λｚ所采用的方法。结果与结论设Ｄｐ＝｛λ∈｜ ｆλ（ｚ）有一个ｐ阶的吸性周期点｝,Ｄｐ表示Ｄｐ的一个连通分支。     

间接碘量法误差问题讨论

间接碘量法是常用的氧化还原分析方法之一。本文对引起间接碘量法产生误差的各种原因进行了讨论,推导出不对称电对氧化还原反应计量点电位计算的一般表达式,并提出了改进滴定方法的建议。     

Δ—伪度量族与Menger概率度量空间

引进了Δ－伪度量族概念,研究了Ｍｅｎｇｅｒ概率度量空间与Δ－伪度量族生成空间的关系,证明了每个Ｍｅｎｇｅｒ概率度量空间（Ｅ,Ｆ,Δ）都可由Ｅ上的一个Δ－伪度量族｛ｄλ｝λ∈（０,１）所确定．     

Carbazole-type compounds in crude oils

Carbazole-type compounds were analyzed using GC and GC-MS-MS. A relatively high concentration of carbazole-type compounds was detected in crude oils of different types (marine and non-marine) and different maturities (low mature and mature) in Tarinl. Liaohe and Keilu basins. The results suggest the ratios of 1, 8-dimethyl-/2, 7-dimethylcarbazole and benu, [a] carbazole/benzo [e] carbazole might be taken as petroleum migration parameters.     

Observational study of the circulation in the southern South China Sea

CTD data from two oceanographic survey cruises, conducted by “Shiyan No. 3” R/V during two reversing monsoons, were employed to calculate and analyze the distributions of temperature, salinity and geopotential anomaly in the southern South China Sea (SSCS). Based on these distributions, the horizontal structures of the SSCS circulation are described systematically. Study results show that the SSCS circulation structure could be classified as a two-layer (the upper and the lower) pattern, and that the main circulation in the upper layer (0–400 m) is driven by the South China Sea monsoons and is opposite in direction to the reversal of the monsoons. The distributions of principal current systems and their features are presented. Two important local phenomena, local eddy and oceanic front, were observed.