多孔径仿生复眼成像系统技术进展综述

昆虫复眼是一种理想的小型化、多孔径、大视场的视觉系统,具有智能特征,虽然由于每个复眼的孔径尺寸和数值孔径都很小,使昆虫复眼的视力较差,但是其对运动目标却有很高的探测灵敏度,且对光的强度、波长和颜色等都有较强的分辨力。长期以来,人们一直致力于昆虫复眼的特性以及仿生昆虫复眼的研究。对目前常见的复眼类型和现有的各种类型的仿生...     

社会地位、收入税和随机经济增长

在一个具有生产性政府花费的随机增长模型中,把体现社会地位的财富引入消费者效用函数.讨论了社会地位、收入税、随机扰动对经济增长、消费—财富比和消费者福利的影响以及社会地位对税收政策制订的影响;并且确定了最优税率.     

Preparation and Application of an Immunoaffinity Column for Direct Extraction of Morphine and its Analogs from Opium

A rapid, simple and accurate method using an immunoaffinity column (IAC) andcapillary electrophoresis (CE) for the analysis of the major alkaloids in opium is developed. TheIAC was synthesized by coupling specific morphine polyclonal antibodies to CNBr-activedSepharose 4B. The IAC showed high selectivity and obvious enrichment to morphine, codeine,dionin and thebaine. The extraction solution was analyzed by CE with J3-cyclodextrin as anadditive. Recoveries of the four alkaloids from PBS were between 93%-105% with RSD valueless than 5.0%. The result showed that this method was practical for the determination ofmorphine analogs in opium.     

Diels-Alder reactivity of 4-aryl-1-phthalimido-2-siloxy-1,3-butadienes

The reaction of (1Z,3E) and (1E,3E) 4-aryl-1-phthalimido-2-trialkylsiloxy-1,3-butadienes with maleimides and quinones has been studied. The observed exo-stereospecifity can be attributed to the simultaneous presence of the phthalimido and aryl groups, which produce strong hindrance during the endo approach.     

一种合成β,β-二对甲苯基-α-丙氨酸的实用方法

以丝氨酸为原料合成了β，β-二对甲苯基-α-丙氨酸的衍生物，总收率45％。     

多大户期货市场博弈分析

本是对存在多个大户的期货市场的博弈分析，讨论了大户和散户的博弈行为，得出在完全信息和不完全信息条件下的博弈情况及其均衡，为期货市场的大户在复杂情况下选择投资行为提供新的思路。     

一类区间数系数矩阵模糊线性方程组的迭代算法

讨论模糊线性方程组X=A-X+U解的存在条件及其迭代算法(其中,A-是区间数为元素的n阶矩阵,未知量X和常量U都是以模糊数为元素的n维向量,并且其加法和乘法均由Zadeh的扩张原理定义).首先研究解的存在条件,尔后探讨求解的迭代算法及误差估计.     

Gas phase FT-IR absorption spectroscopy as a quantitative diagnostic method for cold plasmas: Application to hollow cathode discharges of acetylene and sulfur reduced compounds (DMS and DMDS)

Gas phase compounds produced in low pressure dc hollow cathode flowing discharges of acetylene, dimethylsulfide (DMS) and dimethyldisulfide (DMDS) have been, by the first time, identified and quantitatively measured through in situ FT-IR absorption spectroscopy. Experimental discharge parameters have been varied in the ranges where stable enough plasmas were produced. A high conversion of precursors to non-volatile compounds is observed. Only diacetylene has been detected in the infrared spectra of acetylene/inert gas discharges, with yields between 3 and 13%. Its appearance indicates that the C₂H radical is the main intermediate species produced in such discharges. CS₂, CH₄ and C₂H₂ have been the most abundant products detected in the infrared spectra of DMS and DMDS plasmas, their maximal yields being in the range 5–20%. The concurrent production of CO, CO₂ and OCS, with yields one to two orders of magnitude lower, must be attributed to oxidation processes of the precursors due to air traces in the discharge cell. No final gaseous compounds, either oxygenated or not, suggesting the production of the CH₃S radical as intermediate species were detected in these plasmas. The results presented clearly prove that hollow cathode discharges (HCD) produce cold plasmas where high temperature chemistry is conducted.     

马尔可夫链在贫困县农村劳动力流动趋势预测中的应用

贫困县农民脱贫致富的有效途径是进行农村劳动力的有序流动。要想科学地引导该区域农村劳动力的有序流动,必须对农村劳动力流动的趋势有一个整体的认识。本文利用马尔可夫链(Markovchain)建立了贫困县农村劳动力流动趋势模型,对贫困县农村劳动力转移达到稳定状态的年限及其极限概率作出定量预测,对政府和有关部门制定贫困县农村劳动力转移的决策具有一定的借鉴意义。     

流域水资源分配纳什均衡实现过程的进化博弈分析

由于有限理性，流域不同地区在水资源数量与质量分配上就不像完全理性情况下分析的那样，一开始就能找到最好的对策来直接实现纳什均衡。本运用进化博弈理论，说明有限理性的流域不同地区能够通过不断地学习、协调，逐步地提高自己的理性程度并相应地调整对策，来达到一个具有一致性的水资源数量与质量分配的纳什均衡。本的结论可为流域管理机构制定相应的水资源管理政策提供理论依据。