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Selective Construction of Borromean Rings and Tweezer-Like Molecular Assembly Featuring Cp^(*)Rh/Ir Clips for Near-Infrared Photothermal Conversion

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Chinese Journal of Chemistry 2023年第23期41卷 3229-3237页

作者： Yan Zou Hai-Ning Zhang qiu-shui mu Li-Long Dang Guo-Xin Jin Department of Chemistry Shanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsState Key Laboratory of Molecular Engineering of PolymersFudan UniversityShanghai200438 China College of Chemistry and Chemical Engineering Luoyang Normal UniversityHenan Province Function-Oriented Porous Materials Key LaboratoryLuoyangHenan471934 China

Making full use of coordination-driven self-assembly strategy,we herein described the selective synthesis of a molecular Borromean rings and two cases of “U”-shaped tweezer-like molecular assemblies in high yield by using bipyridyl ligands based on biphenyl unit and half-sandwich binuclear rhodium(III)/iridium(III) building *** selective synthesis was realized by adjusting the length of dipyridyl *** utilization of curved U-shaped bipyridyl ligand L1 led to tweezer-like molecular ***,olefinic bonds were introduced to elongate dipyridyl arms obtaining ligand *** ligand L2 has two stable conformations,U-shape and Z-shape,which facilitated the formation of different topologies including the tetranuclear macrocycle and Borromean rings with different building blocks in this *** structures in solid and solution all have been further confirmed by single-crystal X-ray diffraction,NMR analysis,and mass *** addition,as an important driving force,π-π stacking interactions not only played a significant role in the stability of structures but also further triggered photothermal conversion in *** experimental results demonstrated that compounds 1a and 2 had good NIR photothermal conversion efficiency (11.83% and 17.76%),and further analysis found the photothermal conversion efficiency had a gradual increase in the trend with the π-π stacking interactions *** research expands the application of topological structures in materials science and provides a new idea for the synthesis of novel photothermal conversion materials.

关键词： Self-assembly π-πstacking interaction Half-sandwich Cp*Rh/Ir Rhodium Iridium Borromean rings and Tweezer-like molecular assembly Near-infrared photothermal conversion

Response of harmonically and stochastically excited strongly nonlinear oscillators with delayed feedback bang-bang control

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第1期10卷 54-61页

作者： Chang-shui FENG Wei-qiu ZHU Institute of Mechatronic Engineering Hangzhou Dianzi University Hangzhou 310018 China State Key Laboratory of Fluid Power Transmission and Control Department of Mechanics Zhejiang University Hangzhou 310027 China

We studied the response of harmonically and stochastically excited strongly nonlinear oscillators with delayed feedback bang-bang control using the stochastic averaging method. First, the time-delayed feedback bang-bang control force is expressed approximately in terms of the system state variables without time delay. Then the averaged It6 stochastic differential equations for the system are derived using the stochastic averaging method. Finally, the response of the system is obtained by solving the Fokker-Plank-Kolmogorov （FPK） equation associated with the averaged lt6 equations. A Duffing oscillator with time-delayed feedback bang-bang control under combined harmonic and white noise excitations is taken as an example to illus- trate the proposed method. The analytical results are confirmed by digital simulation. We found that the time delay in feedback bang-bang control will deteriorate the control effectiveness and cause bifurcation of stochastic jump of Duffing oscillator.

关键词： Nonlinear system Delayed feedback bang-bang control Combined harmonic and white noise excitation Stochastic averaging Stationary response Stochastic jump

Emerging roles and therapeutic potentials of sphingolipids in pathophysiology:emphasis on fatty acyl heterogeneity

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Journal of Genetics and Genomics 2024年第3期51卷 268-278页

作者： Jinming mu Sin Man Lam Guanghou shui State Key Laboratory of Molecular Developmental Biology Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100101China Lipidall Technologies Company Limited ChangzhouJiangsu 213000China

Sphingolipids not only exert structural roles in cellular membranes,but also act as signaling molecules in various physiological and pathological processes.A myriad of studies have shown that abnormal levels of sphingolipids and their metabolic enzymes are associated with a variety of human ***,blood sphingolipids can also be used as biomarkers for disease *** review summarizes the biosynthesis,metabolism,and pathological roles of sphingolipids,with emphasis on the biosynthesis of ceramide,the precursor for the biosynthesis of complex sphingolipids with different fatty acyl *** possibility of using sphingolipids for disease prediction,diagnosis,and treatment is also *** endogenous ceramides and complex sphingolipids along with their specific fatty acyl chain to promote future drug development will also be discussed.

关键词： Sphingolipids Ceramide Therapeutic targets Microdomain Biomarker

Recreational value estimation of suburban leisure agriculture:a case study of the Qianjiangyue agritourism farm

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Journal of Mountain Science 2016年第1期13卷 183-192页

作者： qiu Sheng-rong FAN shui-sheng Department of Rural Development Economics CollegeFujian Agriculture and Forestry University Agro-tourism Institution Fujian Agriculture and Forestry University

As a form of economic and community development, agritourism has a strong and widespread appeal to all tourists. To explore the situation and value of agritourism in China, the Qianjiangyue agritourism farm located between Fuzhou City and Yongtai County was chosen to evaluate recreational values. The data was obtained from tourists and farm samples in Qianjiangyue agritourism farm by questionnaires. Two basic models including the zonal travel cost method （ZTCM） and the individual travel cost method （ITCM） were applied for data analysis. The recreational value estimation results obtained from ITCM and ZTCM showed that the total consumer surplus （CS） of the Qianjiangyue agritourism farm in 2Oll was estimated at 54,533,300 CNY （8,894,682 US$） which was equal to a CS per tourist of 3029.63 CNY （494.i5 US$）, and the annual recreational value of agricultural landscapes per hm2 was 36i,o78 CNY （58,893.82 US$）. The average annual recreational value of agritourism farmland was 15.7 times of that from traditional farming, and 6 times of present land business income. This paper will be helpful for exploring and utilizing appropriate environmental resources in China.

关键词： Agritourism Qianjiangyue Recreationalvalue Estimation

Bi-directional Secure Communication Based on Discrete Chaotic Synchronization

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Communications in Theoretical Physics 2007年第6期47卷 1076-1080页

作者： LONG Min qiu shui-Sheng PENG Fei College of Computer and Communication Changsha University of Science ＆ Technology Changsha 410076 China College of Electronic ＆ Engineering South China University of Science ＆ Technology Guangzhou 510640 China College of Computer ＆ Communication Hunan University Changsha 410082 China

Discrete chaotic systems are used for bi-directlonal secure communication. Both sides of communication keep sending signals to achieve their synchronization, and then recover the messages. However, the third side without keys cannot get useful information. Known-plaintext attack is also engaged to analyze this method, and the simulation results show that the proposed method can reach high security performance.

关键词： bi-directional secure communication discrete chaotic synchronization

Circumnuclear Star Forming Activity in NGC 3982

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Chinese Journal of Astronomy and Astrophysics 2008年第5期8卷 555-565页

作者： shui-Nai Zhang qiu-Sheng Gu Yi-Peng Wang Department of Astronomy Nanjing University Nanjing 210093 China

We present a study of the nearby Seyfert galaxy NGC 3982 using optical, infrared and X-ray data acquired by SDSS, Spitzer and Chandra. Our main results are as follows：（1） A simple stellar population synthesis on the nuclear and circumnuclear SDSS spectra gives unambiguous evidence of young stellar components in both the nuclear and circumnuclear regions. （2） The Spitzer Infrared Spectrograph （IRS） spectrum of the central region （∽ 3＂） shows a power-law continuum, a silicate emission feature at 9.7μm, and significant PAH emission features at 7.7, 8.6, 11.3 and 12.7 pro, suggesting the coexistence of AGN and starburst activities in the central region of NGC 3982. （3） We estimate the star formation rate （SFR） of the circumnuclear （∽ 5＂ - 20＂） region from the Hα luminosity to be SFRHα = 0.52 M⊙ yr^-1, which is consistent with the result from the Spitzer IRAC 8 μm luminosity, SFR8.0μm = 0.57 M⊙ yr^-1. （4） We measure the spectral energy distribution for the active nucleus of NGC 3982 from radio to X-ray, and obtain a bolometric luminosity of Lbol 4.5 × 10^42 erg s-1, corresponding to an Eddington ratio （Lbol//LEdd） of 0.014 The HST image of NGC 3982 shows a nuclear mini-spiral between the circumnuclear starforming region and the nucleus, which could be the channel through which gas is transported to the supermassive black hole from the circumnuclear star-forming region.

关键词： galaxies Seyfert - galaxies starburst - galaxies nuclei - galaxies individual (NGC 3982)

Treatment of extracranial internal carotid artery dissecting aneurysm with SUPERA stent implantation:Two case reports

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World Journal of Clinical Cases 2022年第5期10卷 1602-1608页

作者： Min-Jian qiu Bao-Rong Zhang shui-Jiang Song Department of Neurology The Second Affiliated Hospital of Zhejiang University School of MedicineHangzhou 310009Zhejiang ProvinceChina

BACKGROUND There is no standard endovascular treatment for extracranial internal carotid artery dissecting *** the past,stent-graft isolation and stent-assisted coil embolization were commonly used for wide-necked and fusiform ***,we present two cases of extracranial internal carotid artery dissecting aneurysms treated successfully using the SUPERA *** SUMMARY Case 1 was a 57-year-old male patient with sudden right limb weakness and vague speech and diagnosed with cerebral infarction in February *** computed tomographic angiography(CTA)revealed left internal carotid artery dissection with *** at 2 mo showed an eccentric wide-necked dissecting aneurysm(5 mm×5 mm×12 mm,10-mm neck)that was enlarged at 4 mo(7 mm×6 mm×12 mm,11-mm neck).The patient underwent SUPERA stent *** condition was stable in July *** 2 was a 57-year-old man who suddenly felt dizzy and developed unsteady walking in November *** CTA suggested right internal carotid artery dissecting aneurysm(11 mm×9 mm×31 mm)complicated with severe lumen stenosis(95%).The patient underwent SUPERA stent *** patient had no residual symptoms and was stable in December *** SUPERA stent implantation might achieve good results in treating wide-necked or long fusiform internal carotid artery dissecting aneurysms.

关键词： Extracranial Internal carotid artery Dissecting aneurysm Stent Case report

HSE training matrices templates for grassroots posts in petroleum and petrochemical enterprises

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Petroleum Science 2017年第3期14卷 560-569页

作者： Shao-Lin qiu Lai-Bin Zhang mu Liu China University of Petroleum (Beijing) Beijing 102249China CNPC Research Institute of Safety and Environment Technology Beijing 102206 China

This paper aims to standardize health, safety and environment（HSE） training matrices for effectively identifying training requirements and enhancing job competency of grassroots posts in petroleum and petrochemical enterprises. After an investigation into HSE training performance in petroleum and petrochemical enterprises, HSE training matrices templates for 239 grassroots posts involving 22 primary petroleum and petrochemical disciplines were developed based on the technical requirements of HSE training matrices templates and the studies of template development processes and technical methods at grassroots level. Applications of these templates in 12 companies demonstrate their effectiveness in improving HSE training and management for grassroots posts,strengthening risk control and promoting the application of HSE system and tools in grassroots units.

关键词： Petroleum and petrochemical enterprise Grassroots posts HSE Training matrices Template

Reaction mode between Si and Fe and evaluation of optimal species in poly-silicic-ferric coagulant

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Journal of Environmental Sciences 2007年第6期19卷 678-688页

作者： FU Ying YU shui-li YU Yan-zhen qiu Li-ping HUI Ban School of municipal and Environmental Engineering Harbin Institute of Technology Harbin 150090 China School of Civil and Architectural Engineering University of Jinan Jinan 250022 China Extraction the Fourth Factory Daqing Oilfield Company Ltd. Daqing 163113 China

A kind of Fe-polysilicate polymer, poly-silicic-ferric （PSF） coagulant was prepared by co-polymerization （hydroxylation of mixture of Fe^3＋ and fresh polysilicic acid （PS））, in which PSF0.5, PSF1 or PSF3 denotes Si/Fe molar ratio of 0.5, 1 or 3, respectively. The effects of Si/Fe ratio and reaction time （co-polymerization time or aging time） on the reaction mode between Si and Fe were studies, and the optimal species of PSF was evaluated by pH change during the preparation of PSF and coagulation tests. The results showed that the characteristics of PSF are largely affected by both reaction time and Si/Fe ratio. PSF is found to be a essential complex of Si, Fe, and many other ions. The reaction mode between Si and Fe differs with various Si/Fe ratios. The pH of PSF0.5, PSF1 or PSF3 tended to be stable when reaction time is 10, 25 or 55 rain, respectively, which is almost consistent with the time reaching the relative stable morphology that is just the optimal species of higher coagulation efficiency. The optimal reaction time reaching optimal species can be evaluated by measuring the pH change during the polymerization process.

关键词： poly-silicic-ferric coagulant reaction mode optimal species