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Neighbourhood systems based attribute reduction in formal decision contexts

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CAAI Transactions on Intelligence Technology 2019年第4期4卷 245-254页

作者： xiaohe zhang Jusheng Mi Meizheng Li Meishe Liang College of Mathematics and Information Science Hebei Normal UniversityShijiazhuangPeople’s Republic of China College of Computer and Cyber Security Hebei Normal UniversityShijiazhuangPeople’s Republic of China Shijiazhuang Vocational Technology Institute ShijiazhuangPeople’s Republic of China

Attribute reduction of formal decision context mainly uses the relationship between two concept lattices generated by the condition and decision attributes to remove redundant condition *** using decision attributes to observe the covering of objects,this study defines two types of consistent sets and reducts in a consistent formal decision context based on neighbourhood *** types of reductions in inconsistent formal decision contexts are also *** methods to calculate all types of reductions are formulated by discernibility ***,an approach to obtain the decision rules in consistent formal decision context is proposed.

关键词： formal decision context

Laser-induced fluorescence:Progress and prospective for in vivo cancer diagnosis

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Chinese Science Bulletin 2013年第18期58卷 2003-2016页

作者： LIU Wei zhang xiaohe LIU KunPing zhang SiDa DUAN YiXiang Research Center of Analytical Instrumentation Analytical & Testing CenterCollege of ChemistrySichuan University College of Water Resoure & Hydropower Sichuan University

Cancer diagnosis and treatment are of great interest due to the high death rate of *** improve the cure rates of cancer,a diagnostic tool which can detect and treat cancer at initial stages is great ***-induced fluorescence(LIF) is an adequate analytical technique with advantages of high sensitivity,low sample consumption,short testing time,and suitable for in situ ***,it has become one of the most widely used spectroscopic methods for cancer in vivo diagnosis in recent *** review mainly focuses on the applications of in vivo LIF to distinguish premalignant,malignant from normal tissues in a variety of organ systems,such as lung breast,colon,cervix,esophagus,and *** potential influence factors for cancer diagnostics and the subsequent suitability of the method to different applications are well ***,the technical merits and weaknesses of the LIF technology for cancer diagnosis are also ***,different exogenous fluorophores,endogenous fluorophores,and fluorophores synthesized in the tissue are compared on their active principle and effect *** technical potentials of LIF for further development and future applications are also presented as well in this review.

关键词：激光诱导荧光诊断工具癌症体内应用程序 LIF 原位测试器官系统

The self-regulation process and its mechanism of channels' bed changes in the Changjiang(Yangtze) Estuary in China

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Acta Oceanologica Sinica 2015年第7期34卷 123-130页

作者： zhang xiaohe LI Jiufa ZHU Wenwu CHENG Heqin CHEN Wei State Key Laboratory of Estuarine and Coastal Research East China Normal University Institute for Marine and Atmospheric Research Utrecht Utrecht University

Recent bathymetric changes in the Changjiang Estuary under the influence of artificial regulation engineerings and basin reservoirs have been analyzed based on the maritime charts since 1997 and recent fieldworks. The results indicate a slight erosion of the channels in the upper and middle estuary, continuing deposition and seaward move of the mouth bar crest and intensifying erosion at the nearshore seabed. It is noteworthy that the morphological evolution caused by intensive human activities dominates over the changes from nature process. First, the riverbes are eroded overall in the South Branch （SB）, the South Channel （SC） and the upper and middle reaches of the North Channel （NC）. The nearshore seabed outside the river mouth is being eroded slightly, which is attributed to the declining sediment supply from the Changjiang Basin due to the construction of the Three Gorges Dam upstream. The sediment above the seabed is very active and coarsened, meanwhile, sand waves are becoming more distinct. Second, a deposition occurs in the North Brach （NB）, the mouth of the NC, the mouth bars of the North Passage （NP） and the South Passage （SP） and especially the main channel of the NP, where it shows a massive siltation after the deep waterway project. The reasons for the recent changes are not only the dynamic structure in estuarine mouth bars, but also the supply of sediment resuspension in a local and offshore area. Meanwhile, the severe erosion and siltation in some reaches is related to the construction of estuarine engineerings. It is indicated that the Changjiang Estuary is gradually self-adjusted and adapting to the varying natural factors and intensive human activities. The study on the mechanism of self-regulation of the recent bathymetric changes in the Changjiang Estuary has important and practical significance.

关键词： Changjiang Estuary bathymetric changes self-regulation human activities tidal current sediment transport

Detecting MoS2 and MoSe2 with optical contrast simulation

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Progress in Natural Science:Materials International 2019年第6期29卷 667-671页

作者： xiaohe zhang Hiroyo Kawai Jing Yang Kuan Eng Johnson Goh Victoria Junior College Institute of Materials Research and Engineering A*STAR (Agency for Science Technology and Research) Department of Physics Faculty of Science National University of Singapore

Optical imaging is a promising method to identify and locate 2D materials efficiently and non-invasively. By putting a 2D material on a substrate, the nanolayer will add to an optical path and create a contrast to the case when the nanolayer is absent. This optical contrast imaging can be used to identify the 2D material and its number of layers. To make the optical imaging process in the laboratories an effective tool, Fresnel Law as a model was used to simulate the optical imaging results of 2D materials(graphene, Mo S2 and MoSe2) on top of different thickness of SiO2and Si wafer in the present investigation. The results provide the details of the optimal conditions(optimal light wavelength and optimal SiO2thickness) to identify and locate single to few 2D nanolayers, which can be used directly in laboratories. The optical contrasts of 1–5 layers of molybdenum disulfide(MoS2) and molybdenum diselenide(MoSe2) were simulated. To the best of our knowledge, it is the first time that the optical contrast results of MoSe2have been reported. In particular, this work highlights the sensitivity of the model on the accuracy of the refractive indices used. It is demonstrated that through computational modeling that optical contrast can allow effective determination of number of layers in few layer 2D materials.

关键词： 2D materials Optical imaging Substrate Fresnel law

Design,Synthesis,and Fungicidal Activity of Substituted Cinnamaldehyde Thiosemicarbazone Inhibitors on Tyrosinase

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Design,Synthesis,and Fungicidal Activity of Substituted Cinn...

第十届全国化学生物学学术会议

作者： Xuebo zhang Xinling Yang Peng Lei xiaohe zhang Yun Ling Department of Applied Chemistry College of ScienceChina Agricultural University

Melanin has the significant physiological function not only in the growth of insect but also in fungi and bacteria. Tyrosinase is the key enzyme in the formation of melanin, which distributed in animals, plants and microbes. More than ten tyrosinase crystal structures had been found since the crystal structure of tyrosinase from *** was first obtained by multiple homo-crystal substitutions in 2006. Therefore, inhibiting the activity of tyrosinase or controlling the biosythesis of melanin is a potent way to find new agrochemicals. In our previous work, PMDD-5 Y, one of thiosemicarbazone analogues, not only has tyrosinase inhibitory activity but also has antifungal activity. However, its low solubility in organic and inorganic solvent is not favorable for pesticide formulations and transmission. As a hydrophobic fragment, piperidine plays an important role in pesticide and medicine industry. Piperidine derivatives have been studies extensively by organic chemists due to their various biological properties. In the present work, in order to improve the water-solubility or fat-solubility of PMDD-5 Y, a series of thiosemicarbazone analogues containing piperidine moiety were designed and synthesized via linking activity sub-structures method based on the lead compound PMDD-5 Y（Figure 1）, their tyrosinase inhibiting activity and fungicidal activities were also studied.

关键词： Thiosemicarbazide Tyrosinase inhibitor Piperidine derivatives Fungicidal activity

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此身何寄:游戏元宇宙中的身体问题

理论月刊 2023年第8期 152-160页

作者：张小禾南京大学马克思主义学院

随着移动互联网+、扩展现实、大数据、全息与传感等新技术的飞速发展,元宇宙顺势而出,使用户能够以数字人、虚拟人、信息人等身份进入虚拟空间活动。游戏作为元宇宙的雏形,提供给玩家一种全新的虚拟世界体验,使玩家的意识可以带动身体... 详细信息

随着移动互联网+、扩展现实、大数据、全息与传感等新技术的飞速发展,元宇宙顺势而出,使用户能够以数字人、虚拟人、信息人等身份进入虚拟空间活动。游戏作为元宇宙的雏形,提供给玩家一种全新的虚拟世界体验,使玩家的意识可以带动身体介入虚拟空间。游戏元宇宙所蕴含的寓身性、交互性、创生性以及情感参与式的沉浸体验为玩家的身体介入游戏元宇宙提供了理论可能性。在技术的赋能下,人可以在游戏元宇宙中拥有不同的虚拟身体,体验不同的虚拟人生,由此拥有全新的身体体验以及情感寄托。但是人在现实世界具备鲜活的身体,虚拟世界与现实世界的交错在场会带来记忆的混乱以及情感的错位。在元宇宙中,虽然身体可以在新的维度上迎来新颖的感知、体验、情感,但真实的身体却缺场了。这种影响会返回现实身体,人的身体好似获得了自由却又在更深层次上被禁锢起来。

关键词：游戏元宇宙身体现象学

Femtosecond laser trapping dynamics of two-photon absorbing hollow-core nanoparticles

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Chinese Optics Letters 2020年第8期18卷 59-64页

作者： Liping Gong xiaohe zhang Zhuqing Zhu Guanghao Rui Jun He Yiping Cui Bing Gu Advanced Photonics Center Southeast UniversityNanjing 210096China Key Laboratory of Optoelectronic Technology of Jiangsu Province School of Physical Science and TechnologyNanjing Normal UniversityNanjing 210023China School of Physics and Electronics Central South UniversityChangsha 410012China Collaborative Innovation Center of Light Manipulations and Applications Shandong Normal UniversityJinan 250358China

We investigate femtosecond laser trapping dynamics of two-photon absorbing hollow-core nanoparticles with different volume fractions and two-photon absorption(TPA)*** simulations show that the hollow-core particles with low and high-volume fractions can easily be trapped and bounced by the tightly focused Gaussian laser pulses,*** studies show that the hollow-core particles with and without TPA can be identified,because the TPA effect enhances the radiation force,and subsequently the longitudinal force destabilizes the trap by pushing the particle away from the focal *** results may find direct applications in particle sorting and characterizing the TPA coefficient of single nanoparticles.

关键词： laser trapping multiphoton processes ultrafast nonlinear optics

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热浸种消毒杀菌机设计

农业机械学报 2007年第2期38卷 90-92,97页

作者：吴海平范宏珍张晓和山西农业大学工程技术学院山西大学化学化工学院

设计一种能替代传统人力操作的热浸种消毒杀菌机。该机主要结构由内桶和锥桶组成,内桶的搅拌装置有利于快速均匀加热种子,并且容易把杀菌温度较好地控制在±1℃的误差范围内,经试验和分析给出了锥桶锥角α=10°。趁热脱水后的种子能及... 详细信息

设计一种能替代传统人力操作的热浸种消毒杀菌机。该机主要结构由内桶和锥桶组成,内桶的搅拌装置有利于快速均匀加热种子,并且容易把杀菌温度较好地控制在±1℃的误差范围内,经试验和分析给出了锥桶锥角α=10°。趁热脱水后的种子能及时干燥。该机还可完成选种、清洗作业。

关键词：种子热浸种消毒杀菌机械

掺杂卟啉铜的TiO_2/SiO_2有机–无机复合材料制备及其非线性折射率

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硅酸盐学报 2011年第1期39卷 125-129页

作者：张晓荷夏海平王冬杰宁波大学光电子功能材料重点实验室浙江宁波315211 宁波大学材料化学与工程学院浙江宁波315211

以正硅酸乙酯与钛酸丁酯为前驱体,用溶胶–凝胶法将水溶性的5,10,15,20-四(4-磺酸苯基)卟啉铜(tetra(4-sulfonatophenyl)porphine,TPPS)(Cu(Ⅱ)–TPPS)掺杂到TiO2/SiO2固体介质中,制备了Cu(Ⅱ)–TPPS掺杂TiO2/SiO2有机–无机复合材料。通过分析样品的紫外–可见吸收光谱,研究了Cu(Ⅱ)–TPPS在凝胶基质中的分子状态。结果表明:Cu(Ⅱ)–TPPS在TiO2/SiO2凝胶介质中的最大单体掺杂摩尔分数为10–10。随着Cu(Ⅱ)–TPPS掺杂浓度的进一步提高,在凝胶体系中开始形成Cu(Ⅱ)–TPPS二聚体,且二聚体含量随着凝胶化过程的进行而增多。应用Z扫描技术研究了不同Cu(Ⅱ)–TPPS掺杂浓度的复合材料的非线性光学性质,其三阶非线性折射率达–2.991×10–17 m2/W。

关键词：非线性光学有机–无机复合材料四(4-磺酸苯基)卟啉铜