Gaussian process assisted coevolutionary estimation of distribution algorithm for computationally expensive problems

In order to reduce the computation of complex problems, a new surrogate-assisted estimation of distribution algorithm with Gaussian process was proposed. Coevolution was used in dual populations which evolved in parallel. The search space was projected into multiple subspaces and searched by sub-populations. Also, the whole space was exploited by the other population which exchanges information with the sub-populations. In order to make the evolutionary course efficient, multivariate Gaussian model and Gaussian mixture model were used in both populations separately to estimate the distribution of individuals and reproduce new generations. For the surrogate model, Gaussian process was combined with the algorithm which predicted variance of the predictions. The results on six benchmark functions show that the new algorithm performs better than other surrogate-model based algorithms and the computation complexity is only 10% of the original estimation of distribution algorithm.     

Integrated solid-state nanopore devices for third generation DNA sequencing

Third generation DNA sequencing relies on monitoring the ionic current blockage during the DNA molecule’s threading through a nanoscale pore.It is still really tough to attain the single base discrimination on a DNA strand by merely analyzing the ionic current due to speedy DNA translocation and low spatial resolution.More integrated configurations are pursued to present versatile comparative dissimilarities of the four bases by enhancing the spatial resolution within a DNA molecule translocation event,such as transverse tunneling current,local potential change,and capacitance oriented voltage resonance.In this mini review,the insight is provided into the status quo on several functionalized techniques and methodologies for DNA sequencing and furthermore concluding remark and outlook are presented.     

微机控制流量及热耗量积算仪的研制

本文介绍了一种采用单片微机构成的流量积算仪。该仪表具有两路流量信号及两路温度信号输入，不仅能对流量，还能对热（冷）耗量进行精确的检测及累计。仪表可靠性好，精度高，操作方便，适用于各种需对热（冷）耗量进行计量的场合。     

数值模拟地震形变力场

本文提出用有限元方法和按距离加权平均法数值构造地震形变力场,比较了这两种方法的优点和存在的主要问题,并结合计算机口形学的技术描述组成具体实用的系统．     

表面增强拉曼光谱方法在食品安全检测中的应用研究进展

近年来国内外频发的食品安全事件使得公众对食品安全问题的关注度不断提高,快速、灵敏、可靠的评估食品质量与安全的能力在食品行业中十分重要,因此开发满足食品安全需求的高性能检测技术势在必行。表面增强拉曼光谱（surface-enhanced Raman spectroscopy, SERS）具有高特异性、高灵敏度、无损检测、可实现多重检测等优异性能,在食品安全检测领域得到广泛应用,并取得了令人瞩目的进展。本文介绍了SERS技术的理论基础,总结了增强SERS信号强度的活性基底,综述了基于SERS方法的食品安全检测应用研究进展,讨论了其未来发展趋势与前景,旨在为研究人员根据具体食品安全检测应用需求选择合适的SERS方法提供建议。     

钢包耐材对钢中夹杂物的影响及优化

承钢120 t钢包耐材主要采用铝镁碳质、镁碳质和刚玉质预制块砌筑而成.分析了耐火材料中各组分与钢水的作用及影响机理,研究了钢包耐火材料对钢水中的球状氧化物夹杂、硫化物夹杂、A12 03夹杂等形成的影响.随着钢包使用次数的增加,钢中的夹杂物尺寸、数目均呈上升趋势,提出了减少钢水中夹杂物的具体措施.     

新日铁研发现状分析

介绍了新日铁公司的研发体系、研发方向、研发投入和近20年的重点研发项目,同时着重介绍了重点研发项目中的三项内容：新一代控制冷却工艺“CLC-μ”、47kg级船用中厚板和原油罐用中厚板,指出新日铁的研发关键在于自主创新。     

包钢4150m3高炉炉况分析

包钢7~#高炉2016年11月份整体炉况较差:压差高,炉温波动大,煤气利用率低。通过分析,调整方法是:稳定燃料比,从而稳定炉温;保证中心气流的前提下,减小边缘料层厚度;扩大矿石度差,改善煤气利用;减少落地烧结矿用量,改善料柱透气性,降低压差。     

OLAM网络对环境样品γ能谱核素活度的计算

基于OLAM网络学习机制及解谱原理,构造了能分析γ能谱中核素活度的网络.为获取单质核素能谱用于网络训练,采用解谱软件所提供的刻度方程模拟核素的特征能谱,并用其训练网络.用训练好的网络计算环境土壤样品中238U、226Ra、232Th、40K、137Cs等核素的活度,并将计算结果与SPAS-G解谱软件计算结果相比较.结果显示,两者的平均相对偏差绝对值为2.24%,表明网络的构造及特征能谱的模拟是成功的.     

Pharmacological studies of dopamine transporter imaging agent ~(125/131)I-β-CIT

1 INTRODUCTIONParldnson's diseases axe frequent1y Observed in old people. The postmotem studiesof the patients demonstrated the degeneration of dopndnergic neurons in the substaniaulgra, which leads to a reduction of neuronal projections to the striatum and conse-qUenly a siedcan reduction of the dOPtalne transporters (DAT) which was presy-naPticthe located in st.iatum.[11 In the patients with Alzhefor's diseases, the sndlarphenomenon can also be .b,....d.I1] Thus, the decrease of the…