涡扇机船用化改装性能的分析研究

本文从试验方案的设计、试验数据的拟合整理、试验结果的分析研究等方面探讨了涡扇机改装工作问题。文中提出设计方案的试验结果可通过本文提供的非线性最小二乘拟合程序得出总体性能参数间的解析关系式。文中还建议通过拟合方程式求出的数据可整理成地毯形图,它是预估和探索最佳改装性能的有效途径,具有一定的实用参考价值。本文最后以某型涡扇机改装为实例,通过地毯图的分析得出该机在大气温度300K 下发出功率为11032. 5kW 时的最佳改装方案。     

Demonstration of vitamin D3 metabolism inmytilus edulis

Summary Radiolabeled vitamin D₃ was converted into several polar metabolites upon incubation with tissue homogenates from the common musselMytilus edulis. Chromatographic analysis indicated that the metabolites have chromatographic mobilities different from those of known standards. The results suggest that vitamin D₃ is metabolized in mussels via pathways that differ from the vertebrate systems.Acknowledgments. The authors thank Dr Pirjo Rantamäki for the mussels and F. Hoffmann-La Roche & Co. for supplying the vitamin D₃ metabolite standards. This work was supported by a grant from the Magnus Ehrnrooth Foundation to T. K.     

海底沉积物剪切强度的试验研究

通过在船上现场测试,对勘探海域沉积物剪切强度进行了测试和分析.并从力学特征等方面对海底沉积物进行了综合工程地质特性研究,发现测试区域剪切强度特征随含水量的变化而变化.当含水量较高时,具有抗剪切强度小的力学特性.同时结果也表明沉积物剪切强度随深度加大而增大,到一定深度后强度趋于平稳.不同站位的沉积物由于其类型不同其剪切强度随深度的变化也不一样,有的甚至还有较大的差别.图2,表1,参9.     

Two accumulation modes of marine-origin natural gas in the Tarim Basin

HeUanhe gas field, Lungudong gas field and Tazhong gas field are marine marine-origin natural gas reservoirs in the craton area in the Tarim Basin. The natural gas is generated from Cambrian source rocks. The simulation experiment indicated that the cracking of the dispersedly dissoluble organic matter remaining in the source rocks is the main origin of marine natural gas. There are two modes to form gas reservoirs, one is the dry gas reservoir such as HeUanhe gas field, in which gas accumulated on the fault belt with violent tectonic movement, the other is condensate gas reservoir formed on the inheriting uplift such as Lunnan and Tazhong gas fields. The hybrid simulation experiment of cracking gas and crude oil indicated that crude oil accumulated on a large scale in those uplift belts at the early stage, and natural gas filled the ancient oil reservoir at the late stage, and the gas reservoirs were formed after the gas mixed with the crude oil.     

Main controlling factors of distribution and genetics of marine reservoirs in China

Marine reservoirs are mainly made up of clastics and carbonate reservoirs, which are distributed widely in central Tarim, Sichuan, Ordos basins from the Pre-Cambrian to Cenozoic, mainly in Palaeozoic. Marine clastic reservoirs are developed in foreshore and nearshore, tidal flat and delta environment. The sedimentary facies are important controlling factors for reservoir quality. Compaction, pressolution and cementation are factors of decreasing porosity, and low palaeo-temperature gradient, early emplacement of oil and gas and dissolution are favorable for preservation of pore. Carbonate reservoirs are divided into reef and bank, karst, dolomite and fracture reservoirs. Dolomitization, dissolution, TSR and fracture are important factors of controlling carbonate reservoirs＇ quality.     

Isometachromin,a new cytotoxic sesquiterpenoid from a deep water sponge of the family Spongiidae

Isometachromin (1), a new sesquiterpene-quinone that is related structurally to metachromin C (2), and the known compounds ilimaquinone (3) and and 5-epi-ilimaquinone (4), were isolated from a deep water sponge in the family Spongiidae; the structure of isometachromin was elucidated by spectral methods. Isometachromin exhibits in vitro cytotoxicity against the human lung cancer cell line A 549 (IC₅₀=2.6 g/ml), but not against P 388 murine leukemia (IC₅₀10 g/ml) and also exhibits antimicrobial activity.This research is Harbor Branch Oceanographic Institution (HBOI) contribution number 911. We thank Drs S. A. Pomponi and M. Kelly-Borges (HBOI) for sponge taxonomy, and Dr P. McCarthy and T. Peterson (HBOI) for antimicrobial data.     

植物生长调节剂对几种海洋单细胞藻类增殖的影响

在室内温度16—26℃、光强4800—6500lux培养条件下,研究了3种植物生长调节剂分别对3种海洋单细胞藻类生长的影响。结果表明,在0.005×10_(-6)-1.0×10_(-6)浓度范围内,植物生长调节剂均能促进藻类细胞增殖。其中三十烷醇促进盐沼杜氏藻细胞增殖的最佳浓度为0.1×10_(-6),对巴夫藻的最佳浓度为0.01×10_(-6);生长素2,4-D促进巴夫藻增殖的最佳浓度为0.5×10_(-6);细胞分裂素6-BA促进球等鞭金藻增殖的最佳浓度为1.0×10_(-6)。在接种后第二和第三天植物生长调节剂对藻细胞的促进作用就明显地表现出来,大大缩短了延缓期而使指数生长期提前。     

Marine eicosanoids: Occurrence of 8,11,12-trihydroxylated eicosanoic acids in starfishes

The occurrence of 8,11,12-trihydroxyeicosa-5,14,17(Z),9(E)-tetraenoic acid and 8,11,12-trihydroxyeicosa-5,14(Z),9E-trienoic acid in starfish species, i.e.Patiria miniata, Dermasterias imbricata, Pycnopodia helianthoides, Culcita novaeguinea andNardoa tubercolata is reported.     

基于AIS的船舶驾驶实时增强仿真系统

目前航海模拟器主要用于航海教学与技术培训,而现场使用真实的航行水域中气象环境及目标船信息进行船舶指挥决策仿真的很少.研究系统构成要素,基于AIS的实时真实信息与虚拟环境融合,经验性船舶流体动力模型,运用统一数据源进行电子海图、雷达和三维视景数据精确匹配可视化方法,采用人在回路中的半实物仿真方式,建立船舶驾驶实时增强仿真系统,形成更加逼真的航行区域环境,能够更真实地反映舰船航行时的人机互动,有助于辅助决策结果的实时性、可信性与有效性,实现了船舶航行指挥决策论证和特殊操纵方案评估,实验结果表明了系统的可行性.