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Margolus-Levitin speed limit across quantum to classical regimes based on trace distance

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Chinese Physics B 2020年第5期29卷 80-84页

作者： shao-Xiong Wu chang-Shui Yu School of Science North University of ChinaTaiyuan 030051China School of Physics Dalian University of TechnologyDalian 116024China

The classical version of Mandelstam-Tamm speed limit based on theWigner function in phase space was reported by Shanahan et al.[***.120070401(2018)].We present the Margolus-Levitin speed limit across the quantumto-classical transition in phase space based on the trace *** Margolus-Levitin speed limit is set by the Schatten L1 norm of the generator of time-dependent evolution for both the quantum and classical *** an example,the time-dependent harmonic oscillator is considered to illustrate the result.

关键词： quantum speed limit Wigner function phase space Margolus-Levitin bound

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滚动勘探开发目标区的优选

新疆石油天然气 2006年第3期2卷 59-61,50页

作者：李少华郭永康张昌民姚凤英张尚锋长江大学地球科学学院湖北荆州434023 长庆石油基地第四采油厂地质所陕西靖边718500 江汉油田勘探开发研究院湖北潜江433100

潜北东区内有多个老油田,针对研究区井多、井距较小以及微相类型多的特点,首先根据微相的物性特征及其形态相似性进行了组合,然后采用基于象元的顺序指示模拟方法针对微相组合建立储层骨架模型。在砂体骨架模型的控制下采用顺序高斯模... 详细信息

潜北东区内有多个老油田,针对研究区井多、井距较小以及微相类型多的特点,首先根据微相的物性特征及其形态相似性进行了组合,然后采用基于象元的顺序指示模拟方法针对微相组合建立储层骨架模型。在砂体骨架模型的控制下采用顺序高斯模拟方法建立储层物性(孔隙度、渗透率)参数模型。利用随机建模得到的多个等概率骨架模型,对骨架模型中某网格存在砂体的概率进行统计分析,建立砂体分布大于某一概率的砂体分布概率模型,结合生产井的动态情况,综合分析预测滚动勘探开发的有利目标区3个,提高了滚动勘探开发的成功率。

关键词：目标区优选相控建模砂体分布概率模型滚动勘探开发

Energy efficiency optimization of cognitive relay network based on cooperative spectrum sensing

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The Journal of China Universities of Posts and Telecommunications 2015年第3期22卷 26-34页

作者： Song Yaolian Zhang Fan shao Yubin Long hua Faculty of Information Engineering and Automation Kunming University of Science and Technology

This paper focuses on the energy efficiency of cognitive relay （CR） networks with cooperative sensing, joint optimization of the sensing time and the signal-to-noise ratio （SNR） is studied to maximize the energy efficiency of CR network. Theoretical analysis shows that there exists an optimal sensing time and optimal SNR to make the energy efficiency maximized under a constraint of detection probability. Simulation results illustrate that the optimal fusion rule performs better than the OR rule and the AND rule in terms of the energy efficiency. By properly designing the fusion rule threshold as well as the number of cooperative sensing users, the energy efficiency of CR networks can be further improved.

关键词： cognitive radio network cognitive relay network energy efficiency sensing time fusion rule threshold number of cooperative sensingusers

Differential Polymorphic Transformation Behavior of Polybutene-1 with Multiple Isotactic Sequences

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Chinese Journal of Polymer Science 2020年第2期38卷 164-173,I0007页

作者： Ya-Ping Ma Wei-Ping Zheng Chen-Guang Liu hua-Feng shao hua-Rong Nie Ai-hua He Shandong Provincial Key Laboratory of Olefin Catalysis and Polymerization Key Laboratory of Rubber-Plastics (Ministry of Education) Qingdao University of Science and Technology

For the solid-solid transformation from form Ⅱ to form Ⅰ of isotactic polybutene-1(iPB),the temperature dependence of form Ⅰ nucleation and growth was deemed to control the transformation ***,the relationship between formⅠ formation and form Ⅱ disappearance in the transformation process is not *** this work,the spontaneous crystal transformation from form Ⅱ to Ⅰ of iPB with 81 mol%mmmm sequence concentration is studied firstly by tracking the two processes,the decay of form Ⅱ and the yielding of form Ⅰ in a wide range of temperature spanning from 0℃ to 50℃ and in a long transformation time ranging from 5 min to 65 days with in situ FTIR and *** the literature reports,the decay rate of form Ⅱ is firstly found to be lower than the yielding rate of form Ⅰ at all studied temperatures,especially at low transition *** is attributed to the amorphous chains which locate near crystal lamella participating into the nucleation of form Ⅱ.The regular chain folding and growth of i PB form Ⅰ from amorphous chains containing short isotactic sequences also lead to an increase in crystallinity of form Ⅰ compared with that of initial form Ⅱ crystallized at 60℃.An increase in the annealing temperature results in decrease in crystallinity and increase in lamellae thickness of i PB formⅠ.

关键词： Polybutene-1 Polymorphic transformation Isotactic sequence Crystallinity Lamellae thickness

Optimization of formation for multi-agent systems based on LQR

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Frontiers of Information Technology & Electronic Engineering 2016年第2期17卷 96-109页

作者： chang-bin YU Yin-qiu WANG Jin-liang shao School of Automation Hangzhou Dianzi University Hangzhou 310018 China Research School of Engineering The Australian National University Canberra ACT 0200 Australia School of Mathematics Science University of Electronic Science and Technology of China Chengdu 611731 China

In this paper,three optimal linear formation control algorithms are proposed for first-order linear multiagent systems from a linear quadratic regulator(LQR) perspective with cost functions consisting of both interaction energy cost and individual energy cost,because both the collective ob ject(such as formation or consensus) and the individual goal of each agent are very important for the overall ***,we propose the optimal formation algorithm for first-order multi-agent systems without initial physical *** optimal control parameter matrix of the algorithm is the solution to an algebraic Riccati equation(ARE).It is shown that the matrix is the sum of a Laplacian matrix and a positive definite diagonal ***,for physically interconnected multi-agent systems,the optimal formation algorithm is presented,and the corresponding parameter matrix is given from the solution to a group of quadratic equations with one ***,if the communication topology between agents is fixed,the local feedback gain is obtained from the solution to a quadratic equation with one *** equation is derived from the derivative of the cost function with respect to the local feedback *** examples are provided to validate the effectiveness of the proposed approaches and to illustrate the geometrical performances of multi-agent systems.

关键词： Linear quadratic regulator (LQR) Formation control Algebraic Riccati equation (ARE) Optimalcontrol Multi-agent systems

Linear Viscoelastic Behaviors of Polybutene-1 Melts with Various Structure Parameters

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Chinese Journal of Polymer Science 2016年第2期34卷 174-184页

作者： hua-feng shao Shu-lei Wang Xia Dong 贺爱华 Shandong Provincial Key Laboratory of Olefin Catalysis and Polymerization Key Laboratory of Rubber-Plastics(Ministry of Education)Qingdao University of Science and TechnologyQingdao 266042China Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Engineering PlasticsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China

The effects of weight-average molecular （Mw）, molecular weight distribution （MWD）, and isotacticity on the linear viscoelastic behavior of polybutene-1 melts are studied. It is observed that the linear viscoelastic region becomes slightly narrower with increasing frequency. In frequency sweeps, the transition of the polymer melts flow from Newtonian flow to power-law flow can be observed. The melts with higher Mw and：or broader MWD, as well as higher isotacficity exhibit higher complex viscosity, zero shear viscosity, viscoelasticity moduli, relaxation modulus, broader transition zone, while lower critical shear rate, non-Newtonian index, and the frequency at which elasticity begins to play an important role. The relationship of zero shear viscosity on Mw has been established, which agrees with the classical power law. Furthermore, it is found that the cross-over frequency decreases with increasing Mw and the cross-over modulus increases with narrowing MWD.

关键词： Polybutene-1 Molecular weight Molecular weight distribution Isotacticity Linear viscoelastic behaviors.

Cloning and Characterization of a Salt Tolerance-Associated Gene Encoding Trehalose-6-Phosphate Synthase in Sweetpotato

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Journal of Integrative Agriculture 2014年第8期13卷 1651-1661页

作者： JIANG Tao ZHAI Hong WANG Fei-bing ZHOU hua-nan SI Zeng-zhi HE shao-zhen LIU Qing-chang Beijing Key Laboratory of Crop Genetic Improvement/Laboratory of Crop Heterosis and Utilization Ministry of Education/College of Agriculture and Biotechnology China Agricultural University

Trehalose plays an important role in metabolic regulation and abiotic stress tolerance in a variety of organisms. In plants, its biosynthesis is catalyzed by two key enzymes： trehalose-6-phosphate synthase（TPS） and trehalose-6-phosphate phosphatase（TPP）. In the present study, a TPS gene, named IbTPS, was first isolated from sweetpotato（Ipomoea batatas（L.） Lam.） cv. Lushu 3 by rapid amplification of cDNA ends（RACE）. The open reading frame（ORF） contained 2 580 nucleotides encoding 859 amino acids with a molecular weight of 97.433 kDa and an isoelectric point（pI） of 5.7. The deduced amino acid sequence showed high identities with TPS of other plants. Real-time quantitative PCR analysis revealed that the expression level of IbTPS gene was significantly higher in stems of Lushu 3 than in its leaves and roots. Subcellular localization analysis in onion epidermal cells indicated that IbTPS gene was located in the nucleus. Transgenic tobacco（cv. Wisconsin 38） plants over-expressing IbTPS gene exhibited significantly higher salt tolerance compared with the control plant. Trehalose and proline content was found to be significantly more accumulated in transgenic tobacco plants than in the wild-type and several stress tolerance related genes were up-regulated. These results suggest that IbTPS gene may enhance salt tolerance of plants by increasing the amount of treahalose and proline and regulating the expression of stress tolerance related genes.

关键词： cloning IbTPS gene Ipomoea batatas(L.) Lam. salt tolerance

Treatment and resource recovery from inorganic fluoride-containing waste produced by the pesticide industry

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Journal of Environmental Sciences 2015年第5期27卷 21-29页

作者： Yang Li hua Zhang Zhiqi Zhang Liming shao Pinjing He State Key Laboratory of Pollution Control and Resources Reuse Tongji University Institute of Waste Treatment and Reclamation Tongji University Research and Training Center on Rural Waste Management Ministry of Housing and Urban–Rural Development of P.R.China

The rapid development of the fluorinated pesticide industry has produced a large amount of fluorine-containing hazardous waste, especially inorganic fluoride-containing waste（IFCW）. A two-step process, including extraction and recovery, was developed to recover fluorine as synthetic cryolite from IFCW produced by the pesticide industry. The optimum conditions for extraction were found to be a temperature of 75℃, an initial p H（p Hi） of 12, a4-hr incubation time and a liquid-to-solid ratio of 40 m L/g; these conditions resulted in a fluorine extraction ratio of 99.0%. The effects of p H and the F/Al molar ratio on fluorine recovery and the compositional, mineralogical and morphological characteristics of the cryolite products were investigated. Field-emission scanning electron microscopy of recovered precipitates showed changes in morphology with the F/Al molar ratio. Coupling Fourier transform and infrared spectroscopy, X-ray diffraction indicated that the formation of Al F3-6was restricted as increasing p H. Both the amount of fluorine recovered and the quality of the cryolite were optimized at initial p H = 3 and a F/Al molar ratio 5.75. This study proposed a reliable and environmentally friendly method for the treatment of fluoridecontaining wastes, which could be suitable for industrial applications.

关键词： Fluoride-containing waste Fluorine extraction Fluorine recovery Cryolite

Leaching toxicity characteristics of municipal solid waste incineration bottom ash

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Frontiers of Environmental Science & Engineering 2016年第2期10卷 399-411页

作者： Khamphe PHOUNGTHONG Yi XIA hua ZHANG Liming shao Pinjing HE State Key Laboratory of Pollution Control & Resource Reuse Tongji University Shanghai 200092 China Institute of Waste Treatment and Reclamation Tongji Universily Shanghai 200092 China Centre for the Technology Research and Training on Household Waste in Small Towns & Rural Area Ministry of Housing and Urban-RuralDevelopment of PR China (MOHURD) Shanghai 200092 China

The continuously increasing production of municipal solid waste incineration bottom ash （MSWIBA） has promoted its utilization as construction material and raised environmental concern. The physico-chemical properties and leaching behavior of MSWIBA were studied, and ecotoxicological testing using a luminescent bacterium bioassay was performed to assess the ecological pollution risks associated with its leached constituents. The MSWIBA was leached by two types of leachants, H2SO4/HNO3 and HAc solution, at different liquid to solid ratios and contact times. The concentrations of heavy metals and anions in the leachates were analyzed. Multi- variate statistical analyses, including principle component analysis, Pearson＇s correlation analysis and hierarchical cluster analysis, were used to evaluate the contributions of the constituents to the toxicity （ECso） of the MSWIBA leachate. The statistical analyses of the ecotoxicological results showed that the Ba, Cr, Cu, Pb, F and total organic carbon （TOC） concentrations were closely correlated with the ECso value, and these substances were the main contributors to the ecotoxicity of the MSWIBA leachate. In addition, the cluster of these variables indicated similar leaching behaviors. Overall, the research demonstrated that the ecotoxicological risks resulting from MSWIBA leaching could be assessed before its utilization, which provides crucial information for the adaptation of MSWIBA as alternative materials.

关键词： Municipal solid waste incineration bottomash alternative material leaching tests toxicity Vibrio qinghaiensis (Q67)