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REGULARITY AND RECURRENCE OF SWITCHING DIFFUSIONS

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Journal of Systems Science & Complexity 2007年第2期20卷 273-283页

作者： George yin chao ZHU Department of Mathematics Wayne State University Detroit Michigan 48202 U.S.A.

这个工作涉及切换的散开过程，也已知的切换 asregime 散开。我们的注意集中于内在的随机的过程的整齐，复发，和积极复发。主要努力被奉献给为上述的性质获得容易可证实的条件。Continuous-state-dependent 跳过程被考虑。用 Liapunov... 详细信息

这个工作涉及切换的散开过程，也已知的切换 asregime 散开。我们的注意集中于内在的随机的过程的整齐，复发，和积极复发。主要努力被奉献给为上述的性质获得容易可证实的条件。Continuous-state-dependent 跳过程被考虑。用 Liapunov 功能的整齐和复发上的第一个一般标准被获得。然后，我们集中于问题，飘移和散开系数关于连续状态在是“ linearizable ”的一个类，并且假定这进程的jump 部分的生成器能被各态历经的 Markov *** 的一个生成器接近为整齐的条件，复发，和积极复发被导出，它是平均系数的线性联合(关于 Markov 链的静止措施平均)。

关键词：马尔可夫链交换扩散过程规律性循环性

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甘油氯化催化剂的制备和应用研究

广州化工 2024年第4期52卷 79-81页

作者：王良广唐计光郜婷婷刘悦徐伟伟尹超山东鲁泰控股集团股份有限公司石墨烯高分子复合材料研发中心山东济宁272000

本文针对当前甘油氯化制备环氧氯丙烷存在的甘油纯度要求高、催化活性差、二氯丙醇收率低等问题,合成了6种新型的复合催化剂,并对甘油氯化反应条件进行了研究。研究确定了最优的反应条件,在最优的反应条件下,6种复合催化剂均表现出较优... 详细信息

本文针对当前甘油氯化制备环氧氯丙烷存在的甘油纯度要求高、催化活性差、二氯丙醇收率低等问题,合成了6种新型的复合催化剂,并对甘油氯化反应条件进行了研究。研究确定了最优的反应条件,在最优的反应条件下,6种复合催化剂均表现出较优的催化活性,甘油的转化率高达100%,二氯丙醇的收率最高为92%。复合催化剂A-Fe-Zn-Al对甘油原料的适用范围较广,对于甘油含量70%的粗甘油可直接合成二氯丙醇,二氯丙醇的收率高达88%。

关键词：甘油二氯丙醇氯化催化剂

Understanding the spatial interaction of ultrasounds based on three-dimensional dual-frequency ultrasonic field numerical simulation

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China Foundry 2024年第1期21卷 29-43页

作者： Zhao-yang yin Qi-chi Le Yan-chao Jiang Da-zhi Zhao Qi-yu Liao Qi Zou Key Lab of Electromagnetic Processing of Materials Ministry of EducationNortheastern UniversityShenyang 110819China School of Materials Science and Engineering Northeastern UniversityShenyang 110819China

A transient 3D model was established to investigate the effect of spatial interaction of ultrasounds on the dual-frequency ultrasonic field in magnesium alloy *** effects of insertion depth and tip shape of the ultrasonic rods,input pressures and their ratio on the acoustic field distribution were discussed in ***,the spacing,angle,and insertion depth of two ultrasonic rods significantly affect the interaction between distinct *** a result,various acoustic pressure distributions and cavitation regions are *** spherical rods mitigate the longitudinal and transversal attenuation of acoustic pressure and expand the cavitation volume by 53.7%and 31.7%,respectively,compared to the plate and conical *** the input pressure will enlarge the cavitation region but has no effect on the acoustic pressure distribution *** acoustic pressure ratio significantly affects the pressure distribution and the cavitation region,and the best cavitation effect is obtained at the ratio of 2:1(P15:P20).

关键词： dual-frequency ultrasonic numerical model acoustic pressure spatial interaction magnesium alloy

生物纳米材料作为药物递送系统用于退变椎间盘再生治疗的研究进展

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广东医学 2024年第7期45卷 924-928页

作者：王政纬黎松波黎建文尹煜超谢子颖广东医科大学第一临床医学院广东湛江524023 南方医科大学第十附属医院东莞市骨科常见骨病基础、临床与数字化研究重点实验室广东东莞523069

椎间盘退变性疾病是导致下腰痛的主要原因之一,传统保守治疗或手术治疗均存在明显局限性。近年来,生物纳米材料因其出色的生物降解性、生物相容性、高度精准的药物传递、延长药物释放时间以及增强药物疗效等特点成为目前的研究热点。本... 详细信息

椎间盘退变性疾病是导致下腰痛的主要原因之一,传统保守治疗或手术治疗均存在明显局限性。近年来,生物纳米材料因其出色的生物降解性、生物相容性、高度精准的药物传递、延长药物释放时间以及增强药物疗效等特点成为目前的研究热点。本文通过系统地综述生物纳米材料在椎间盘退变再生治疗方面的相关研究成果,为实现椎间盘退变性疾病的精确治疗提供有用的参考。

关键词：生物纳米材料药物递送系统椎间盘退变性疾病髓核细胞再生

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冷水鱼养殖尾水治理技术试验

河北渔业 2024年第1期 12-16页

作者：闫立君王圆圆朱静孟秋冬赵强方会卿尹超石家庄市水产技术推广站河北石家庄050091 平山县水产技术推广站河北平山050400

为保护水域生态环境,实施环保养殖,加强养殖业自身环保建设,采用固液分离、沉淀吸收、氧化降解、微生物降解过滤净化和植物吸收等生态处理技术,开展冷流水养殖尾水综合处理技术研究,在处理系统为养殖面积40%的情况下,能有效降低尾水中的... 详细信息

为保护水域生态环境,实施环保养殖,加强养殖业自身环保建设,采用固液分离、沉淀吸收、氧化降解、微生物降解过滤净化和植物吸收等生态处理技术,开展冷流水养殖尾水综合处理技术研究,在处理系统为养殖面积40%的情况下,能有效降低尾水中的COD和氮磷,处理效果分别达到了100%、87.13%、75.56%。

关键词：冷水鱼养殖尾水治理

Deep learning-based semantic segmentation of human features in bath scrubbing robots

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Biomimetic Intelligence & Robotics 2024年第1期4卷 70-79页

作者： chao Zhuang Tianyi Ma Bokai Xuan Cheng Chang Baichuan An Minghuan yin Hao Sun School of Artificial Intelligence and Data Science Hebei University of TechnologyTianjin 300401China Engineering Research Center of Intelligent Rehabilitation Device and Detection Technology Ministry of EducationTianjin 300401China

With the rise in the aging population,an increase in the number of semidisabled elderly individuals has been noted,leading to notable challenges in medical and healthcare,exacerbated by a shortage of nursing *** study aims to enhance the human feature recognition capabilities of bath scrubbing robots operating in a water fog *** investigation focuses on semantic segmentation of human features using deep learning ***,3D point cloud data of human bodies with varying sizes are gathered through light detection and ranging to establish human ***,a hybrid filtering algorithm was employed to address the impact of the water fog environment on the modeling and extraction of human ***,the network is refined by integrating the spatial feature extraction module and the channel attention module based on *** results indicate that the algorithm adeptly identifies feature information for 3D human models of diverse body sizes,achieving an overall accuracy of 95.7%.This represents a 4.5%improvement compared with the PointNet network and a 2.5%enhancement over mean intersection over *** conclusion,this study substantially augments the human feature segmentation capabilities,facilitating effective collaboration with bath scrubbing robots for caregiving tasks,thereby possessing significant engineering application value.

关键词： 3D point cloud Human model LiDAR Semantic segmentation

Long-distance blue light signalling regulates phosphate deficiency-induced primary root growth inhibition

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Molecular Plant 2022年第10期15卷 1636-1637页

作者： Yi-Qun Gao Ling-Hua Bu Mei-Ling Han Ya-Ling Wang Zong-Yun Li Hong-Tao Liu Dai-yin chao 不详

(Molecular Plant 14,1539–1553;September 62021)In Figure 4G,we showed the root apical meristem lengths of different ***,because of inappropriate use of the software Adobe Illustrator(AI)and the high degree of similarity between the pictures,we mistakenly kept the picture of Col-0(panel of 50μM Pi),which was set as an object of reference in a lower layer for all the other panels for typesetting purposes and should have been deleted after typesetting,in the position of cry1cry2 mutant.A similar mistake also happened in Figure S15,in which we kept the GUS staining picture of line#3(panel of pLPR1::GUS/hy5)in the position of line#*** wrong pictures in these two figures have been substituted with correct pictures in the figure *** authors sincerely apologize for the mistakes.

关键词： Illustrator Figure deleted

Four New Terpyridine Complexes Based Polyoxometalates with[W_(10)O_(32)]^(4-) Anions as High-Efficiency Dual-Site Catalysis for Thioether Oxidation Reaction

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Chinese Journal of Chemistry 2024年第6期42卷 592-598页

作者： yin Zhang Wei-Dong Yu Fang-Qian Wang Xiangnan Wang Jiawan Zhou chao Liu Jun Yan Junior Education Department Changsha Normal UniversityChangshaHunan410100 China School of Science Hunan University of Technology and BusinessChangshaHunan410000 China College of Chemistry and Chemical Engineering Central South UniversityChangshaHunan410000 China

Polyoxometalates modified with complex cations have attracted increasing attention because of the fascinating properties and the controllable *** adjusting the synthesis conditions,four new terpyridine complexes based hybrid POMs,[(TPY-H)CuCl]_(4)[W_(10)O_(32)]·2DMF·2H_(2)O(1),[(TPY-H)Cu(DMSO)(H_(2)O)]_(2)[W_(10)O_(32)]·2H_(2)O(2),[(TPY-H)_(2)Cu]_(2)[W_(10)O_(32)]·6DMSO·8H_(2)O(3) and[(TPY-Br)CuCl(DMSO)(H_(2)O)]_(2)[(TPY-Br)CuCl]_(2)[W_(10)O_(32)]·2DMSO·4H_(2)O(4),were prepared by using‘one-pot’***-crystal X-ray diffraction analyses,infrared radiation,etc.,revealed the structural composition of compounds 1—4,which indicates that synthesis conditions have a directional regulatory effect on the compounds *** oxidation catalytic reactions show 1—4 have good catalytic activities,and powder X-ray diffraction and thermogravimetry analysis show 1—4 have superduper catalytic ***,4 has better catalytic activity because of the different structure of terpyridine ***,a possible mechanism of dual-site catalysis by both cations and anions is proposed.

关键词： Polyoxometalates Terpyridine complexes Thioether oxidation Dual-site catalysis Clusters

Ultrahard X-ray multifunctional application beamline at the SSRF

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Nuclear Science and Techniques 2024年第6期35卷 14-25页

作者： Ke Yang Zhao-Hui Dong Chun-yin Zhou Zi-Long Zhao Dong-Xu Liang Sai-chao Cao Ai-Guo Li Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201210China

The ultrahard X-ray multifunctional application beamline(BL12SW)is a phase-II beamline project at the Shanghai Syn-chrotron Radiation *** primary X-ray techniques used at the beamline are high-energy X-ray diffraction and imaging using white and monochromatic *** main scientific objectives of ultrahard X-ray beamlines are focused on two research *** is the study of the structural properties of Earth’s interior and new materials under extreme high-temperature and high-pressure conditions,and the other is the characterization of materials and processes in near-real service *** beamline utilizes a superconducting wiggler as the light source,with two diamond windows and SiC discs to filter out low-energy light(primarily below 30 keV)and a Cu filter assembly to control the thermal load entering the subsequent optical *** beamline is equipped with dual *** first was a meridional bending Laue monochromator cooled by liquid nitrogen,achieving a full-energy coverage of 30-162 *** second was a sagittal bending Laue monochromator installed in an external building,providing a focused beam in the horizontal direction with an energy range of 60-120 *** were four experimental hutches:two large-volume press experimental hutches(LVP1 and LVP2)and two engineering material experimental hutches(ENG1 and ENG2).Each hutch was equipped with various near-real service conditions to satisfy different *** example,LVP1 and LVP2 were equipped with a 200-ton DDIA press and a 2000-ton dual-mode(DDIA and Kawai)press,***1 and ENG2 provide in situ tensile,creep,and fatigue tests as well as high-temperature *** June 2023,the BL12SW has been in trial *** is expected to officially open to users by early 2024.

关键词： Shanghai Synchrotron Radiation Facility Ultrahard X-ray High energy diffraction High energy imaging Engineering materials Earth science