New data on sponges from Svalbard Archipelago with a description of a new species of Halicnemia

Sponge fauna from the west and south of Svalbard archipelago was studied. A total of 28 species of sponges were identified. Five of them are new records to the study area and one is new to science. New records for Spitsbergen are: Axinella hispida (Koltun 1959), Haliclona rossica (Hentschel 1929), Myxilla (Myxilla) perspinosa (Lundbeck 1905), Sphaerotylus borealis (Swartschewsky 1906) and Suberites carnosus (Johnston 1842). A new species of sponge, Halicnemia wagini sp. nov., collected south-west of Spitsbergen on the continental slope at a depth of 423–425 m, is described. It is similar to Halicnemia patera (Bowerbank 1864) and H. verticillata (Bowerbank 1866) in skeleton architecture, but significantly differs in its spicule complement and external appearance. Primarily, distinct differences concern the morphology of microscleres. In comparison with Halicnemia patera, the new species has an additional category of acanthose microscleres presented by microstrongyles, while microscleres of H. verticillata are only slightly curved and also verticillately spined. The study area, west of Spitsbergen, establishes close relationships with North Atlantic due to warm Atlantic waters of the West Spitsbergen Current. Proximity of the new species to the North Atlantic representatives of Halicnemia genus allowed us to suggest that H. wagini sp. nov., both ecologically and morphologically, has stood apart as a distinct biological species in the conditions of the Arctic.

http://www.zoobank.org/lsid:zoobank.org:pub:2A09537B-63D7-4F07-A2AB-9C707A686333     

典型植被的高效电磁全波分析方法研究

(地物的电磁散射特性一直以来在遥感、探测、反隐身等领域具有重要的应用价值。由于地物类型繁多且分布不均匀, 随着计算场景的扩大, 理论模型变的越来越复杂, 计算量也会直线上升。在这种情况下, 现有计算平台和建模能力不足以模拟并准确地得到场景环境较大时典型地物的电磁散射特性, 导致理论模型的预测值与实验测量数据相差甚远。因此, 急需建立一种高效的全波电磁分析方法, 从而能够精确、高效地分析典型地物的电磁散射特性, 为实际大型地面场景特性仿真提供模型与理论支撑。)本文建立了求解TDS、介质的混合积分方程, 采用周期格林函数技术, 实现大场景下典型植被的雷达散射截面积快速计算。     

局部对称共形平坦Riemann流形中具有平行单位中曲率向量的子流形

运用正交标架法 ,把 S.T.Yau的 Simons型 Pinching定理推广到环绕空间是局部平坦的情形     

利用形成性评价,促进青年教师成长

本文阐述了形成性评价的概念及特征,对青年教师进行形成性评价的基本理念、基本功能、具体方法及应注意的问题,以便合理有效地运用形成性评价促进青年教师健康发展.     

A Theorem on Surface with Parallel Nondegenerate Minimal Section

本文给出了空间形式中具平行极小截面曲面的一个定理,从而将文献中相应结果推广到一般的m维空间形式中。     

变形Mason公式及其在采样系统中的应用

在采样系统的分析中,系统的脉冲 Z 传函 G(Z)或者系统输出的 Z 变换Y(Z)的求取是十分重要的工作。本文提出一种“星”运算法,并在此基础上推导证明了适用于采样系统变形的 Mason 公式,利用此公式,可以方便地求取某些采样系统的 Y(Z)或 GB(Z)。     

Density-functional formula for strongly correlated systems

Up to now, computation method dealing withthe many electron systems has been based on single particle approximation. That is to say, the wavefunctions of a system are composed of single particlewave functions (SPWF’s), and all the physical prop erties are determined by the SPWF’s. There havebeen two sophisticate techniques to solve the SPWF’s.One is the well known Hartree Fock self consistent e quations (HFSCE). The other is the Kohn Sham e quations of density funct…     

(火用)和(火无)

(火用)和(火无)是热力学的两个新概念,它是在研究能源学基础上建立起来的.用了这两个概念就可评价与区分能量的优劣。本文对此作些理论分析。能量的转换在数量和方向上都有着各自的规律,这是早己知道的事实。但是,能量转换方向对能量可用程度的制约     

受迫FET振荡器Volterra理论分析

该文应用Ｖｏｌｔｅｒｒａ级数法分析电容耦合ＦＥＴ振荡系统在外加信号下的注入锁定现象，解析地推导了出输出信号和注入锁定带宽表达式，首先建立系统的频域模型，然后用Ｖｏｌｔｅｒｒａ级数导出系统的各阶传递函数，最后列出基波方程。结果表明。在外加信号的零时，所求了的解是系统的自治振荡输出，在外加信号频率ωｃ与系统频率ω０相差不大时发生注入锁相，其导出的频率锁定带宽同平均法结果是相同的。     

波动方程双程地下方向照明分析

根据地震数据采集系统，对炮点和检波点位置上的波场分别应用波动方程波场传播和波场局部角度域分解方法得到角度域波场，提出一种在角度域进行双程地下方向照明分析的定量方法，并把它应用于SEG（Society of Explomtion Geophysicists）-EAGE（European Association of Geoscientists ＆ Engineers）二维盐丘模型．地下方向照明的定量信息是入射和反射地震波能量在地下各种构造倾角方向上分布的反映．通过这些信息不仅能评价采集系统对地下目标体的效率，而且还能分析地下结构对地震波传播路径的影响，并可对波动方程叠前深度偏移成像效果进行综合评价．