基于背景插值的空空导弹攻击区在线模拟方法

针对空战态势迅速变化对空空导弹攻击区模拟实时性的需求,提出基于背景插值的攻击区在线模拟方法。首先预测下一采样时刻态势,并针对预测态势模拟解算攻击区信息;当下一采样时刻到来时,利用攻击区预测值和先前两次攻击区模拟信息及相应的态势记录插值估计攻击区真实值。背景插值方法将攻击区模拟解算放到先前计算周期中,实时性高。理论分析证明了背景插值误差随着采样时间的减小收敛于零。仿真结果表明,背景插值模拟方法的误差与传统攻击区模拟方法相当,而前者平均可在7.16×10^-6s内给出结果,后者平均计算耗时为0.290 s。     

冰箱回热毛细管计算模型

在分析现有的冰箱毛细管主要计算模型的基础上,针对冰箱毛细管实际应用情况,建立了冰箱回热毛细管六段流阻模型.该模型充分考虑了回气管与毛细管回热长度以及毛细管进出口截面突变的影响,并对冰箱回热毛细管在三种不同工况下的性能进行了模拟,研究了冷凝温度、蒸发温度、以及毛细管相对位置对毛细管工作性能的影响,结果显示冷凝温度对回热毛细管内的制冷剂流动特性影响最大.     

菲涅耳波带片衍射产生的光谱奇异现象

研究高斯型光谱的完全空间相干光经菲涅耳波带片后,远场轴上点的光谱奇异现象.结果表明,在相位奇异点处,高斯型光谱一分为二,出现光谱开关现象.在相位奇异点附近,一些点处的光谱发生蓝移,而另一些点处的光谱发生红移.这些光谱奇异现象与观测点位置有关,光谱开关总是发生在光强为极小值处.分析和比较几种菲涅耳波带片的光谱奇异现象,以及其光强分布情况.     

沿岸回流区污染物对流扩散的数值模拟

为研究回流区污染物堆积的机理及规律,采用高阶三点紧致差分格式对涡量-流函数方程和污染物对流扩散方程进行高精度数值求解,得到了污染物堆积与回流区岸线角度、排放点位置之间的定量关系.该方法有效抑制了通常的数值方法中对流项差分离散造成数值不稳定的现象,且程序编制简洁,运行效率高。数值计算表明该法有效、可靠.研究结果对沿岸排污点布置、减少海域污染具有一定的现实指导意义,并具有重要的理论价值.     

Three noteworthy mirine plant bugs inhabiting subalpine zones of the Nepalese Himalayas (Hemiptera: Heteroptera: Miridae: Mirinae)

Three unique mirine plant bugs inhabiting typical subalpine vegetation in the Nepalese Himalayas are documented, with their confirmed plant associations. A new genus and new species, Khumbumiris schwartzi, is diagnosed and described, based on a male specimen collected from Abies spectabilis; two additional new species, Lygocoris laligurans (associated with Rhododendron shrubs) and Phytocoris sagarmathanus (Abies spectabilis), are also described. Images of the habitats and live individuals are also provided. The tribal placement of Khumbumiris is discussed in detail.

http:/zoobank.org/urn:lsid:zoobank.org:pub:54E31614-3262-4BF8-8BBB-F81893AF41D2     

Redefinition of Nipponbathynella based on the four new species from East Asia (Crustacea: Bathynellacea: Parabathynellidae)

Four new species of the parabathynellid genus Nipponbathynella Schminke, 1973 are described from South Korea (Nipponbathynella leesookyungae sp. nov., Nipponbathynella donggangensis sp. nov. and Nipponbathynella wanjuensis sp. nov.) and Japan (Nipponbathynella shigaensis sp. nov.), raising the number of known species to seven. Nipponbathynella leesookyungae is characterized by the convex ventral surface of the labrum and the rich ornamentation (with three spinules and two teeth) of the exopod of male thoracopod VIII; N. donggangensis by the distal spine on the distal maxillular segment with many dentils; N. wanjuensis by the endopod of the male thoracopod VIII with one seta (instead of two) and the serrated endopodal spur of the uropod; and N. shigaensis by the basipod of thoracopods II–VII carrying strong hairs on their outer margin. The three new and one known (Nipponbathynella pectina) South Korean species share a bur-like inner lobe of the male thoracopod VIII, suggesting their close relationship. Based on the one-segmented exopod on thoracopod I and two-segmented exopod on the thoracopods II–VII, the bell-shaped male thoracopod VIII and the uropod with sympod carrying a large distal spine in addition to several proximal spines of smaller size, with endopod drawn into a spur and with exopod carrying a seta, a close phylogenetic relationship between Nipponbathynella and Arisubathynella Park and Eun, 2012 is proposed.

http://zoobank.org/urn:lsid:zoobank.org:pub:9650379F-C249-473C-AAA4-B3D638B96322     

国际临界带研究发展回顾与美国临界带研究进展介绍

基于对临界带国际发展态势的分析,梳理了临界带的概念;回顾了国际临界带研究的发展历程;并重点对美国在临界带研究方面的进展及其已经部署的6个临界带观测站进行了详细的介绍。     

以信息化带动创新型园区建设

在剖析创新型园区内涵的基础上,指出以信息化带动创新型园区建设是国家高新区发展的必然选择,并提出了园区建设的对策和建议。     

一维水平自发渗吸无因次模型及其数值解

对影响渗吸特征的油藏参数进行归整, 导出考虑毛细管回压的一维自发渗吸问题无因次模型。该模型选取水相归一化饱和度和无量纲压力作为主未知变量, 毛管压力函数只在模型的一个偏微分方程中出现, 便于数值求解。在求解该模型的全隐式守恒型差分格式中, 对两邻点间饱和度函数取平均饱和度下的值, 就可以得到该问题的数值解。通过对幂律型相对渗透率和毛管压力曲线情形下此模型数值解的讨论, 指出前人关于一维不可压自发渗吸问题解析解所用的假设条件只对纯逆向渗吸有一定的适用性。通过多个同逆并发渗吸算例, 得到油藏参数变化对渗吸动态特征影响的初步认识。     

利用SS前驱波研究纳斯卡–南美俯冲带周边上地幔间断面起伏及其动力学意义

利用USArray的远震记录资料, 对1万多条地震记录的SS前驱波进行共反射点叠加分析(叠加范围是半径为5°的球冠), 得到纳斯卡板块南部及南美板块西部(120°W—60°W, 30°S—5°N)上地幔间断面的起伏形态。由于数据很好地覆盖了研究区域, 叠加范围更小, 因此比以往的结果具有更高的空间分辨率。在Galapagos, Easter和 San Felix这3个热点下方观测到的间断面起伏形态符合地幔深部存在高温异常的假设。还观测到: 在东太平洋洋隆南段下方, 410 km间断面深度增加; 在俯冲带下方, 410 km和 660 km间断面深度增加。