寄生虚反射对外差干涉椭偏测量的影响

研究了一种采用横向塞曼激光器并且没有任何运动部件的外差干涉椭偏测量系统。由非理想的激光源、偏振分光镜等器件所产生的非线性误差,是影响纳米测量精度的主要因素。采用琼斯矢量法,分析并建立了光学系统寄生虚反射所引入的误差模型,讨论了虚反射对误差漂移的影响。在不考虑其它误差因素的前提下,同一光路内部产生的同频率虚反射波对测量结果没有影响;而不同频率的参考光束与测量光束之间的交叉虚反射所产生的膜厚测量误差为亚纳米量级。讨论了消除和抑制虚反射误差的方法。     

An approach to control the spurious currents in a multiphase lattice Boltzmann method and to improve the implementation of initial condition

Multiphase lattice Boltzmann methods are known to generate spurious or parasitic currents at the fluid–fluid interfaces. This nonphysical phenomenon has to be avoided, or at least controlled, in order to achieve reliable solutions. In this article, a method to control these fictitious velocities via lattice refinement is proposed, which is based on interface thickness control for which both the spurious currents and the physical fluid–fluid interface thickness vanishes as the spatial resolution increases. It has been found that a proper interface thickness adjustment is required as the lattice refinement is applied, or an increase in spurious currents, instead of a reduction, can occur. By combining the new method with an appropriate multiphase flow initialization, the overall stability for high density O(1000) and viscosity O(100) ratios is greatly improved. Although this research has been conducted with a Rothman and Keller type lattice Boltzmann model, it is believed that other types of multiphase lattice Boltzmann models could benefit from the basic ideas underlying this research. Copyright © 2015 John Wiley & Sons, Ltd.     

用STATESPACE 过程研究寄生蚤与其宿主关系

基于调查自内蒙古土默特平原的原始数据 ,编写SAS语言程序 ,建立了多元时间序列模型 .结果得到模型值与实测值拟合较好、模型平衡状态稳定且蚤指数与其宿主密度的关系存在时滞现象的结论     

陕西药用植物寄生真菌的研究

本文报导了从陕西省中药材产区调查采集、分离培养、鉴定整理出的34属80种寄生真菌,大多为陕西省首次报道,它们分别寄生在25科59种的药用植物体上。     

川西北草地牛皮蝇蛆病的研究

对川西北草地牛皮蝇蛆病的流行情况、季节动态及防治技术的研究表明：（１）临床检查牦牛１１４９头、黄牛５９９头，皮蝇蛆寄生率分别为８４．２５％和７０．２８％，寄生强度为１８．３２个和２．１７个；剖杀检查牦牛１１４头，皮蝇蛆寄生率为１００％，寄生强度为７１．６６个．（２）川西北草地皮蝇的种类，经形态学和生化特性鉴定定为牛皮蝇Ｈ．ｂｏｖｉｓ、纹皮蝇Ｈ．ｌｉｎｅａｔｕｍ和中华皮蝇Ｈ．ｓｉｎｒｎｓｅ等三种．（３）弄清了皮蝇各期幼虫在牛体内的寄生季节、寄生部位、移行动态、三期幼虫寄生方位、入土化蛹羽化规律、成虫活动规律等．（４）害获灭（Ｉｖｏｍｅｃ）是防治牛皮蝇蛆病的首选药物，具有效果好、广谱、剂量小、安全、使用方便、易于推广等优点，防治后可获显著经济效益和明显社会效益     

河池学院校园寄生植物的危害及其防治

通过对河池学院校园寄生植物的深入调查，共发现了广寄生（Taxillus chinensis（DC．）Danser）等六种常见的寄生植物，归纳了寄生植物分布的七个主要特点，并说明其危害。用数理统计方法对调查数据进行整理分析，得出寄生植物侵害率较高的园林植物种类，提出生态校园建设及寄生植物防治的六点措施。     

免疫逃避型粒子群优化算法

针对基本粒子群优化算法容易陷入局部极值的缺陷,提出了一种免疫逃避型粒子群优化算法.其基本思想是将初始粒子群划分为寄生与宿主两个种群以模拟生物寄生行为,对寄生种群的粒子采用精英学习策略,对宿主群的粒子采用探索策略,再引入免疫系统的高频变异对寄生群采用相应的免疫逃避机制,以增强群体逃离局部极值、提高算法的全局寻优能力.采用标准测试函数的实验结果表明,该算法在收敛速度和求解精度方面均有显著改进.     

大规模集成电路多层布线结构对信号延时的影响

通过集成电路各器件间的布线传递信号的过程，是将信号电荷向布线间形成的寄生电容充放电的过程。本文研究了集成电路多层连线的寄生电容模型、互连线RC树模型的延时估算等电路模拟技术，同时提出了今后该领域的研究方向。     

广西白蜡生产失败原因剖析

广西白蜡生产失败的主要原因是，首先，年降雨量超过１５５２ｍｍ，间接或直接地引起大批白蜡虫死亡；其次，对白蜡虫具有毁灭性的白蜡虫寄生蜂不采取任何防治措施，致使种虫寄生率高达９２．９％。因此，白蜡生产遭受失败。广西气候多种多样，年降雨量、在１５５２ｍｍ以下有２２个县，发展白蜡生产是有潜力的，可逐步恢复和发展白蜡生产。     

Singlet Oxygen during Cycling of the Aprotic Sodium–O2 Battery

Aprotic sodium–O₂ batteries require the reversible formation/dissolution of sodium superoxide (NaO₂) on cycling. Poor cycle life has been associated with parasitic chemistry caused by the reactivity of electrolyte and electrode with NaO₂, a strong nucleophile and base. Its reactivity can, however, not consistently explain the side reactions and irreversibility. Herein we show that singlet oxygen (¹O₂) forms at all stages of cycling and that it is a main driver for parasitic chemistry. It was detected in‐ and ex‐situ via a ¹O₂ trap that selectively and rapidly forms a stable adduct with ¹O₂. The ¹O₂ formation mechanism involves proton‐mediated superoxide disproportionation on discharge, rest, and charge below ca. 3.3 V, and direct electrochemical ¹O₂ evolution above ca. 3.3 V. Trace water, which is needed for high capacities also drives parasitic chemistry. Controlling the highly reactive singlet oxygen is thus crucial for achieving highly reversible cell operation.