点火提前角对混合动力发动机起动工况HC排放的影响

分析了点火提前角的控制原理,通过试验研究了起动过程中不同冷却水温度下混合动力发动机点火提前角的修正对HC排放、催化剂起燃特性以及转化效率的影响规律,并对基于催化剂起燃特性的点火提前角修正值进行了重新标定。为混合动力发动机的控制和整车控制策略的制定奠定了基础。     

目标管理在军工科研单位的应用探讨

介绍了在国内外应用较为成熟和成功的目标管理方法,并简要介绍了我国军工科研单位的一些特点和特性.通过目标管理方法与军工科研单位的特殊性相结合,探讨目标管理方法在军工科研单位中的应用方法.     

A predictive dynamic traffic assignment model in congested capacity-constrained road networks

In this paper, a predictive dynamic traffic assignment model in congested capacity-constrained road networks is formulated. A traffic simulator is developed to incrementally load the traffic demand onto the network, and updates the traffic conditions dynamically. A time-dependent shortest path algorithm is also given to determine the paths with minimum actual travel time from an origin to all the destinations. The traffic simulator and time-dependent shortest path algorithm are employed in a method of successive averages to solve the dynamic equilibrium solution of the problem. A numerical example is given to illustrate the effectiveness of the proposed method.     

浅谈风沙地区路基

介绍了风沙运动的基本规律和风沙对路基的危害。     

新型机舱环氧漆在船舶涂装方面的应用

从船舶涂装入手，为选用新型机舱环氧漆替代传统的醇酸漆，开展相关技术工艺参数对比、配套方案对比、施工周期对比和成本对比，以达到提高涂装效率、降低油漆消耗、减少挥发性有机物（Volatile Organic Compounds，VOCs）排放的目的。     

Remotely-sensed chlorophyll a observations of the northern Red Sea indicate seasonal variability and influence of coastal reefs

The biological dynamics of the open northern Red Sea (21.5°–27.5° N, 33.5°–40° E) have not been studied extensively, due in part to both the inaccessibility of this desert region and political considerations. Remotely-sensed chlorophyll a data therefore provide a framework to investigate the primary patterns of biological activity in this oceanic basin. Monthly chlorophyll a data from the 8-year Sea-viewing Wide Field-of-View sensor (SeaWiFS) mission, and data from the Moderate Resolution Imaging Spectroradiometer (MODIS), were analyzed with the Goddard Earth Sciences Data and Information Services Center (GES DISC) online data analysis system “Giovanni”. The data indicate that despite the normal low chlorophyll a concentrations (0.1–0.2 mg m^− 3) in these oligotrophic waters, there is a characteristic seasonal bloom in March–April in the northernmost open Red Sea (24° to 27.5° N) concurrent with minimum sea surface temperature. The location of the highest chlorophyll concentrations is consistent with a linear box model [Eshel, G., and Naik, N.H., 1997. Climatological coastal jet collision, intermediate water formation, and the general circulation of the Red Sea. J. Phys. Oceanogr. 27(7), 1233–1257.] of Red Sea circulation. Two years in the data set exhibited a different seasonal cycle consisting of a relatively weak northern spring bloom and elevated chlorophyll concentrations to the south (21.5° to 24° N).The data also indicate that large coral reef complexes may be sources of either nutrients or chlorophyll-rich detritus and sediment, enhancing chlorophyll a concentration in waters adjacent to the reefs.     

集装箱码头智能化管理的实际应用

现代化的集装箱码头要在日趋激烈的市场竞争中立于不败之地，必须全方位地应用现代化管理手段，提高管理水平。通过实施智能化管理，缩短船舶在港停泊时间，提高码头堆场周转能力，加快船舶装卸速度，进而改善码头作业效率。     

七里坪隧道浅埋偏压段支护措施优化研究

文章以改建铁路湘桂线永州至柳州段扩能改造工程七里坪隧道工程实例为依托,考虑了浅埋偏压隧道的地质特性以及围岩受力特征,结合七里坪隧道的支护措施,运用三维离散元软件3DEC对七里坪隧道的锚杆支护方案进行了优化.