基于PSD系列芯片的单片机电路设计

简要介绍了如何使用ＰＳＤ芯片来构成单片机系统的硬件电路。     

广西科技馆科普展品设计制作缺陷之探讨

本文对广西科技馆的展品和展示工程设计制作存在的一些问题进行了初步分析,对一些具体展品的缺陷提出了若干改进意见。     

Secure Communications System Through Concurrent AJ and LPD Evaluation

In this paper, a systematic approach and their corresponding metrics for concurrent anti-jamming (AJ) and low probability of detection (LPD) performance evaluations of a secure communications system are investigated. In general, it is necessary to deal simultaneously with adversary threats of both active jamming and passive detection for a secure communications system concern. For independent or concurrent AJ and LPD performance evaluations, a single varying paired and multiple paired fixed collocated jammers/interceptors scenario is explored with real sinc type (sin(x)/x) antenna patterns being considered for the communicators. The error probability with both AJ and LPD being considered simultaneously can be derived as system- and geometry-dependent factors and categorized as system metrics related to jammers, interceptors, and communicators themselves only. Whenever multiple collocated jammers/interceptors are considered, we can observe interesting “smoothed” effects for bit energy to jamming density ratio (E _b /J _o ), when one of these varying jammers/interceptors is approaching or receding. In addition, by means of these system metrics, it is intuitive and straightforward to enhance system performance for the victim or to deteriorate system performance for the adversary, respectively. Moreover, the proposed approach and metrics have also paved one practical way for the developments of the latest emphasized cognitive radio (CR) communications systems, if all the collocated jammers/interceptors on the proposed scenario are replaced with “cooperative” communicators.

海上平台用抽油机设计要求分析

将陆上油田成熟的三抽采油工艺移植到海上,是实现海上稠油和边际油田、老油田高效开发的有效途径。 在对国内海上主要油区油藏条件和采油平台结构进行分析研究的基础上,按照抽油机设计的基本要求,提出了海上平台用抽油机在型号、尺寸方面的基本参数。提出了设计悬点载荷需不小于60 kN,冲程大于5 m,冲次在2～6 min^-1的抽油机,可以满足我国主要海上油田开发的需要,其尺寸高度不大于7 m,长和宽尺寸在1.8 m×2 m内,可满足平台尺寸的要求。为海上平台选用抽油机提供参考。     

仿毛织物设计方法的探讨

从织物的视觉效应、触觉效应和后整理加工 3个方面 ,探讨了仿毛织物在整体设计时如何做到仿毛似毛、仿毛胜毛的设计方法和采取的手段。     

运动饮料配方设计概论

运动中，人体生理发生一系列的变化，包括水分损失、血糖／糖原消耗、电解质损失等，导致运动中／后的疲劳和运动能力下降。以运动中人体生理特点为基础，通过讨论运动前／中／后补充水、碳水化合物及电解质的问题，论证了运动饮料配方设计的原理依据。     

肉制品的调香调味设计

本文说明了肉制品调香调味的一些相关概念 ,着重阐述了调香调味整体设计中应考虑的诸种因素 ,强调了突出企业肉制品调香调味主体风格和特色 ,体现个性化、多样化设计的重要性。     

Suitability of Different Food Grade Materials for the Encapsulation of Some Functional Foods Well Reported for Their Advantages and Susceptibility

Functional foods find a very important place in the modern era, where different types of cancer, diabetes, cardiovascular diseases, etc. are on a high. Irrespective of the abundance of bioactive components in different fruits and vegetables, their low solubility in aqueous solution, vulnerability to destruction in different environmental and gastrointestinal conditions and a low intestinal absorption becomes a concern. Because it is quite difficult to commercialize non food materials for the food encapsulation purposes due to their safety concerns in the human body, scientists in the recent times have come up with the idea of encapsulating the different bioactive components in different food grade materials that are able to safeguard these bioactive components against the different environmental and gastrointestinal conditions and ensure their safe and targeted delivery at their absorption sites. Different food grade encapsulation materials including various oligosaccharides, polysaccharides (starch, cyclodextrins, alginates, chitosan, gum arabic, and carboxymethyl cellulose) and proteins and their suitability for encapsulating various bioactive components like flavonoids (catechins, rutin, curcumin, hesperetin, and vanillin), nonflavonoids (resveratrol), carotenoids (β-carotene, lycopene, and lutein), and fatty acids (fish oil, flaxseed oil, and olive oil) of high medical and nutritional value are reviewed here.     

模拟傅立叶变换技术在伪随机多频观测系统中的应用

2n系列伪随机多频信号是一种较为有效的地球物理激励场源。通过对任意周期信号数学表达式的分析,伪随机多频信号中某一频率信号的幅度与相位可由类似傅立叶变换的表达式求得。在此基础上,设计了相应的硬件电路来实现模拟信号的傅立叶变换,实现对伪随机多频观测系统中的信号幅度和相位观测。硬件电路主要由信号发生器、乘法器和积分器等集成芯片器件组成,简单实用。实验结果表明该技术有良好观测精度,抗干扰能力强,能有效地进行伪随机多频信号观测。