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神华黄骅港疏浚管理的新模式

神华科技 2013年第6期11卷 73-76,85页

作者：苗士勇左书华神华黄骅港务有限责任公司河北沧州061113 交通运输部天津水运工程科学研究院天津300456

神华黄骅港航道工程是长期的、大型的疏浚项目,传统疏浚管理模式在黄骅港有一定的局限性,经过多年的实践和探索,采用扁平式日常管理、数字化精确管理、全方位监控管理相结合的管理模式,实现了黄骅港疏浚的高效率、精细化、全方位、高质... 详细信息

神华黄骅港航道工程是长期的、大型的疏浚项目,传统疏浚管理模式在黄骅港有一定的局限性,经过多年的实践和探索,采用扁平式日常管理、数字化精确管理、全方位监控管理相结合的管理模式,实现了黄骅港疏浚的高效率、精细化、全方位、高质量,走出了一条具有黄骅港特色的疏浚管理新模式。

关键词：黄骅港疏浚工程管理模式

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浅谈航道测量新的出图和图纸分析模式

神华科技 2014年第4期12卷 84-87页

作者：苗士勇郭永丰神华黄骅港务有限责任公司河北沧州061113

水深测量图是水深特征点的描述及分析其基本要求。提出测量结果针对性应用"浅图-深图-最小等距图"出图模式,并引入"象数"思维分析测图,加强对工程质量和进度的分析控制。

关键词：浅图-深图-最小等距图 “象数”思维新模式

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不同尺寸装药烤燃特性的数值模拟研究

中国测试 2016年第10期42卷 85-89页

作者：吴世永王伟力苗润吕鹏博刘晓夏海军航空工程学院山东烟台264001

为研究装药尺寸和升温速率对装药烤燃的点火位置、点火温度和点火时间的影响,该文利用有限元商业软件LS-DYNA对不同尺寸装药在不同升温速率热环境下的烤燃特性进行数值模拟研究。研究发现,不同升温速率下,装药烤燃时的点火位置随着装药... 详细信息

为研究装药尺寸和升温速率对装药烤燃的点火位置、点火温度和点火时间的影响,该文利用有限元商业软件LS-DYNA对不同尺寸装药在不同升温速率热环境下的烤燃特性进行数值模拟研究。研究发现,不同升温速率下,装药烤燃时的点火位置随着装药直径的增加其变化路径相似,均是从装药中心沿着中心轴向两端移动,在距离上下端约1/4处离开中心轴,沿着近似直线向边缘移动。不同升温速率下,装药的点火温度和点火时间均随着装药直径的增大先减小后增大,存在一个最小值。装药直径不变时,装药的点火温度均随着升温速率的增大而增大,装药的点火时间随着升温速率的增大而缩短。

关键词：数值仿真烤燃点火位置点火时间装药尺寸

“摸鱼”如何带来创新?恢复体验曲线中介效应的情景实验与调查证据

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心理学报 2025年第1期57卷 135-151页

作者：徐世勇杨春梦李超平李海蓉中国人民大学劳动人事学院中国人民大学公共管理学院组织与人力资源研究所中国人民大学公共管理学院人才与领导力研究中心北京100872

基于资源保存理论,文章探索了时间窃取行为的过犹不及效应,分析其如何通过恢复体验对创新行为产生影响,以及正念的调节作用。通过对情景回顾实验的182份样本和三轮问卷调研的503份领导−员工配对数据进行统计检验,结果发现:(1)时间窃取... 详细信息

基于资源保存理论,文章探索了时间窃取行为的过犹不及效应,分析其如何通过恢复体验对创新行为产生影响,以及正念的调节作用。通过对情景回顾实验的182份样本和三轮问卷调研的503份领导−员工配对数据进行统计检验,结果发现:(1)时间窃取与恢复体验呈倒U型关系,并进一步对创新行为产生影响;(2)正念调节了时间窃取通过恢复体验对创新行为的影响,即员工的正念水平越高,时间窃取对恢复体验的影响以及通过恢复体验对创新行为的间接作用越强。文章发现时间窃取可以作为一种工作内恢复形式影响员工的恢复体验和创新行为,这一观点丰富了时间窃取相关文献,拓展了工作内恢复的效果和机制研究,同时也为管理员工“摸鱼”提供了实践启示。

关键词：时间窃取恢复体验正念创新行为

Topological effects of macrocyclic polymers:from precise synthesis to biomedical applications

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Science China Chemistry 2017年第9期60卷 1153-1161页

作者： Jinming Hu shiyong Liu Key Laboratory of Soft Matter Chemistry Chinese Academy of SciencesHefei National Laboratory for Physical Sciences at the MicrosealeiChem(Collaborative Innovation Center of Chemistry for Energy Materials)Department of Polymer Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026China

Polymer chain architectures play a crucial role in the physical properties of polymers and this unique phenomenon has been recognized as the topological *** one of the most representative architectures,macrocyclic polymers characterized by the endless topology have received extensive attention due to their distinct physical properties as compared to the linear *** understand these differences and unravel the underlying mechanisms,there is a long pursuit to efficiently fabricate macrocyclic *** date,both ring-closing and ring-expansion strategies have been developed,which drastically elevates the accessibility of macrocyclic *** improved availability of macrocyclic polymers enables the further investigation of the biomedical applications and the preliminary results suggest that macrocyclic polymers outperform their linear analogs in terms of improving gene delivery efficiency,elevating blood circulation time,and enhancing colloidal stability of nanoparticles.

关键词： macrocyclic ring-closing ring-expansion blood circulation time gene delivery colloidal stability

Challenges and Opportunities of Precision Polymer Chemistry

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Chinese Journal of Polymer Science 2022年第10期40卷 1129-1130页

作者： shiyong Liu CAS Key Laboratory of Soft Matter Chemistry Department of Polymer Science and EngineeringSchool of Chemistry and Materials ScienceUniversity of Science and Technology of China(USTC)

Since Hermann Staudinger coined the revolutionary concept of macromolecules in 1920, synthetic polymers have served as a major game changer to our society and become indispensable in our daily lives. Unlike biomacromolecules (e.g., DNA and proteins) possessing precise molar masses/chain sequences/topologies and specific biological functions, synthetic polymers are abiotic materials characterized by broad chain length distributions and undefined sequences. To bridge the gap between natural and synthetic polymers, the biomimetic synthesis of polymers with precise chain length, sequences and topologies has been long pursued and yet unmet in polymer science.

关键词： precise sequences synthetic

Learning algorithm and application of quantum BP neural networks based on universal quantum gates

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Journal of Systems Engineering and Electronics 2008年第1期19卷 167-174页

作者： Li Panchi Li shiyong Dept. of Control Science and Engineering Harbin Inst. of Technology Harbin 150001 P. R. China Dept. of Computer Science and Engineering Daqing Petroleum Inst. Daqing 163318 P. R. China

A quantum BP neural networks model with learning algorithm is proposed. First, based on the universality of single qubit rotation gate and two-qubit controlled-NOT gate, a quantum neuron model is constructed, which is composed of input, phase rotation, aggregation, reversal rotation and output. In this model, the input is described by qubits, and the output is given by the probability of the state in which （1） is observed. The phase rotation and the reversal rotation are performed by the universal quantum gates. Secondly, the quantum BP neural networks model is constructed, in which the output layer and the hide layer are quantum neurons. With the application of the gradient descent algorithm, a learning algorithm of the model is proposed, and the continuity of the model is proved. It is shown that this model and algorithm are superior to the conventional BP networks in three aspects： convergence speed, convergence rate and robustness, by two application examples of pattern recognition and function approximation.

关键词： quantum computing universal quantum gate quantum neuron quantum neural networks

Grover quantum searching algorithm based on weighted targets

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Journal of Systems Engineering and Electronics 2008年第2期19卷 363-369页

The current Grover quantum searching algorithm cannot identify the difference in importance of the search targets when it is applied to an unsorted quantum database, and the probability for each search target is equal. To solve this problem, a Grover searching algorithm based on weighted targets is proposed. First, each target is endowed a weight coefficient according to its importance. Applying these different weight coefficients, the targets are represented as quantum superposition states. Second, the novel Grover searching algorithm based on the quantum superposition of the weighted targets is constructed. Using this algorithm, the probability of getting each target can be approximated to the corresponding weight coefficient, which shows the flexibility of this algorithm. Finally, the validity of the algorithm is proved by a simple searching example.

关键词： Grover algorithm targets weighting quantum searching quantum computing.

Recent advances on stimuli-responsive macromolecular magnetic resonance imaging (MRI) contrast agents

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Science China Chemistry 2018年第9期61卷 1110-1122页

作者： Jinming Hu shiyong Liu CAS Key Laboratory of Soft Matter Chemistry Hefei National Laboratory for Physical Sciences at the Microscale i Ch EM (Collaborative Innovation Center of Chemistry for Energy Materials) Department of Polymer Science and Engineering University of Science and Technology of China

Magnetic resonance imaging(MRI) has been extensively used in clinical diagnosis and currently over 30% MRI runs are performed in the presence of contrast agents. However, commercially available contrast agents originated from small molecules typically exhibit relatively low relaxivities and insufficient circulation time. Therefore, there is a long pursuit to develop new contrast agents with high relaxivities to discriminate pathological tissues from normal ones. Compared with small molecule MRI contrast agents, the incorporation of small molecule contrast agents into macromolecular scaffolds allows for constructing macromolecular MRI contrast agents, remarkably elevating the relaxivities due in part to increased rotational correlation time(τR). Moreover, if the macromolecular scaffolds are responsive to external stimuli, the MRI signals could be selectively switched on at the desired sites(e.g., pathological tissues), further intensifying the imaging contrast. In this feature article, we outline the recent achievements in the fabrication of stimuli-responsive macromolecular MRI contrast agents. Specifically, macromolecular contrast agents being responsive to acidic p H, redox potentials, and other stimuli including photoirradiation, pathogens, and salt concentration are discussed. These smart contrast agents could affect either longitudinal(T1) or transverse(T2) relaxation times of water protons or other nuclei(e.g.,19 F), exhibiting enhanced signals in pathological tissues yet suppressed signals in normal ones and displaying promising potentials in in vitro and in vivo MRI applications.

关键词： pH-responsive redox-responsive contrast agents magnetic resonance imaging