关于中小型水电站实施微机监控问题的探讨

中小型水电站微机监控的功能，包括数据采集和处理、程序操作、闭环控制、事故分析指导及离线计算等。监控的模式以实现ＣＢＳＣ为目标，采用分层式系统结构；主控层用微型机，单元层以单片微机为核心构成。以ＩＢＭ－ｐＣ／ＸＴ微型机为例，叙述其过程通道及其抗干扰问题。常规布线逻辑自动化系统的改造是实施微机监控的基础。     

直接斜率波前复原算法的控制效果分析

建立自适应光学系统功率谱抑制函数的概念，分析了采用直接斜率波前复原算法的自适应当光学系统的控制效果，理论分析与６１单元自适应光学系统上的实验结果表明，直接斜率波前复原算法将导致控制效果下降。     

强激光大气传输热晕方程的积分表示

基于菲涅耳 基尔霍夫近似，运用格林函数方法导出了热晕方程的积分表达式，并以连续波(CW)稳态热晕为例进行了数值计算和讨论，结果表明我们所采用的方法是可行的。众所周知的菲涅耳 基尔霍夫衍射积分则是我们所得积分表达的一个特例。     

Generation of a green fluorescent protein gene chromosomal insertion containing Escherichia coli strain for gene induction-based quantification of bioavailable lysine

The importance of lysine determination in feed materials is crucial for the feed industry because this amino acid can be limiting in many of the cereal materials used for animal feeds. The bacterial gene induction-based assay developed in this study aimed to measure lysine bioavailability in feeds as an alternative analytical method for animal assays. The advantages of a gene induction-based approach include rapid and quantitative estimation of many samples and results that relate a bacterial response to a biological response observed in animals. A whole-cell biosensor strain was constructed using a fluorescent E. coli strain that has an inducible fluorescent phenotype sensitive to extracellular lysine contents. A genetic fusion that links the promoter of cad operon with a green fluorescent protein encoding gene (gfp) was constructed, and a fluorescent assay was developed. A standard lysine curve (R² = 0.95) was generated and used for lysine bioavailability quantification of four feed ingredients (whole egg protein, blood-, soybean-, and meat and bone meal). Quantities as low as 50 μg/ml protein of digested samples were sufficient for analyses using the biosensor, except for meat and bone meal. Because of the low levels of free lysine in non-digested samples, fluorescence of these protein sources containing lower than 500 μg/ml protein was not detected (except for soybean meal). The results using enzymatically digested protein sources showed that the test strain emitted a fluorescent response that was proportional to the level of lysine present in the feed samples.     

Threshold cryptography based on Asmuth-Bloom secret sharing

In this paper, we investigate how threshold cryptography can be conducted with the Asmuth-Bloom secret sharing scheme and present three novel function sharing schemes for RSA, ElGamal and Paillier cryptosystems. To the best of our knowledge, these are the first provably secure threshold cryptosystems realized using the Asmuth-Bloom secret sharing. Proposed schemes are comparable in performance to earlier proposals in threshold cryptography.     

苏州现代物流园综合办公大楼解读

文章通过对澳大利亚的JPW建筑设计公司在苏州工业园区设计并建成的物流园综合办公大楼进行介绍和解读，试图让更多的人了解该建筑，并发现其设计中的趣味。     

SDQ941地化-气测综合录井仪

地化-气测录井仪将地化、气测二种成熟的技术,有机地结合在一起.地化、气测数据在同一软件下运行,可达到技术互补的优势,克服了单一录井方法录取资料单一片面的缺陷,有利于提高油气层的发现率和解释成功率,为实现录井仪器和录井服务向综合型发展的战略创造了条件。该文主要介绍了仪器的构成、功能及计算机软件的特色,并阐述了该仪器的技术装备优势及应用前景。     

用于多峰函数优化的小生境差分演化算法

针对监控视频图像的特点,提出了一种有效的实时视频降噪算法。首先结合多帧图像采用基于Non—localmeans的运动检测方法自适应地区分图像的运动区域和静止区域,对静止区域采用时域加权均值滤波,对运动区域采用空域ANL滤波。充分利用了视频的时域、空域信息,在去除视频序列噪声的同时很好地保护了图像的细节。实验结果表明,提出的算法在不造成运动拖影的前提下,能够显著提高视频的信噪比和图像的主观质量。     

Conceptual digital twin modeling based on an integrated five-dimensional framework and TRIZ function model

Digital twin represents a fusion of the informational and physical domains, to bridge the material and virtual worlds. Existing methods of digital twin modeling are mainly based on modular representation, which limits guidance of the modeling process. Such methods do not consider the components or operational rules of the digital twin in detail, thereby preventing designers from applying these methods in their fields. With the increasing application of digital twin to various engineering fields, an effective method of modeling a multi-dimensional digital twin at the conceptual level is required. To such an end, this paper presents a method for the conceptual modeling of a digital twin based on a five-dimensional digital twin framework to represent the complex relationship between digital twin objects and their attributes. The proposed method was used to model the digital twin of an intelligent vehicle at the concept level.     

Polynomial approximation of functions of matrices and applications

In solving a mathematical problem numerically, we frequently need to operate on a vector by an operator that can be expressed asf(A), whereA is anN ×N matrix [e.g., exp(A), sin(A), A^–-]. Except for very simple matrices, it is impractical to construct the matrixf (A) explicitly. Usually an approximation to it is used. This paper develops an algorithm based upon a polynomial approximation tof (A). First the problem is reduced to a problem of approximatingf (z) by a polynomial in z, where z belongs to a domainD in the complex plane that includes all the eigenvalues ofA. This approximation problem is treated by interpolatingf (z) in a certain set of points that is known to have some maximal properties. The approximation thus achieved is almost best. Implementing the algorithm to some practical problems is described. Since a solution to a linear systemAx=b isx=A ^–1 b, an iterative solution algorithm can be based upon a polynomial approximation tof (A)=A ^–1. We give special attention to this important problem.