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ID effects on beam dynamics in the SSRF-U storage ring

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Nuclear Science and Techniques 2023年第11期34卷 140-154页

作者： Li‑Yuan Tan Shun‑qiang Tian Xin‑zhong Liu Xu wu Wen‑Zhi Zhang Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China University of Chinese Academy of Sciences Beijing 100049China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201204China

This paper introduces the proposed insertion device(ID)scheme for the Shanghai Synchrotron Radiation Facility *** on this scheme,the influences of the ID radiation on the intra-beam scattering emittance and energy spread were *** distortion caused by the IDs was comprehensively examined and compensated using both local and global ***,a frequency map analysis method was used to identify potentially dangerous resonance *** addition,the dynamic aperture,energy acceptance,and Touschek lifetime were calculated after considering high-order magnetic field errors to ensure that the ID effect did not affect the operation of the storage ring.

关键词： SSRF-U Insertion devices Emittance Beam dynamic

Electric Field Driven Surface Ion Transport in Hydrophobic Nanopores

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Chinese Journal of Chemistry 2021年第6期39卷 1511-1516页

作者： Xin-Lei Ding Zeng-qiang wu zhong-Qiu Li Xing-Hua Xia State Key Laboratory of Analytical Chemistry for Life Science School of Chemistry and Chemical EngineeringNanjing UniversityNanjingJiangsu 210023China

Water behavior in nanoconfined hydrophobic environment is different from that in the bulk,which greatly influences mass *** switching of nanopores showing great potential for controlled water or ion transport has been realized through several methods,especially the voltage-triggered wetting/dewetting inspired by biological ion ***,in the hydrophobic silanized nanopores,the finite ionic current is still observed and the ion transport mechanism is not yet ***,we explore the ion transport behavior in the hydrophobic silanized anodic aluminum oxide(AAO).Ion transport through this hydrophobic membrane is confirmed,although no aqueous pathway was *** show that ions transport through the cross-linked silane layer on the inner *** is revealed that metal ions,not just the protons or hydroxide ions,are involved in the ion transport driven by external electric *** study provides a new insight into the ion transport in nanoconfined hydrophobic environment which is helpful to understand the biological processes and design new nanofluidic devices.

关键词： Hydrophobic interface Surface ion transport Nanotechnology Surface chemistry Silanes

Can the efficiencies of simplified perovskite solar cells go higher?

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Journal of Energy Chemistry 2021年第7期30卷 33-36页

作者： Jin-Feng Liao Wenhuai Feng Jun-Xing zhong Bing-Xin Lei wu-qiang wu Key Laboratory of Bioinorganic and Synthetic Chemistry(MOE) School of ChemistrySun Yat-sen UniversityGuangzhou 510275GuangdongChina School of Chemistry and Chemical Engineering Key Laboratory of Electrochemical Energy Storage and Energy Conversion of Hainan ProvinceHainan Normal UniversityHaikou 571158HainanChina

In recent years, metal halide perovskites have emerged as star semiconducting materials in the field of optoelectronic devices owing to their fascinating optoelectronic properties. Of particular interest are perovskite solar cells (PSCs), which have witnessed skyrocketing power conversion efficiencies (PCEs) within a short period of time, and were recently certified to reach 25.5%, which is already higher than other thin film photovoltaic technologies[1]. Nevertheless, multiple layers are still needed for state-of-theart PSCs to achieve high PCEs over 21%.

关键词： Perovskite solar cells Charge extraction Charge recombination Interfacial modification Energy level alignment

Effects of a new nitrification inhibitor 3,4-dimethylpyrazole phosphate(DMPP) on nitrate and potassium leaching in two soils

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Journal of Environmental Sciences 2007年第7期19卷 841-847页

作者： wu Shao-fu wu Liang-huan SHI Qi-wei WANG zhong-qiang CHEN Xian-you LI Yong-shan Ministry of Education Key Lab of Environmental Remediation and Ecosystem Health College of Environmental and Resource Sciences Zhefiang University Hangzhou 310029 China. Agricultural Extension Station of Shaoxing City Shaoxing 312000 China Agricultural Extension Station of Shaoxing Country Shaoxing 312000 China

In this study, soil column was used to study the new nitrification inhibitor 3,4-dimethylpyrazole phosphate （DMPP） on nitrate （NO3^-- N） and potassium （K） leaching in the sandy loam soil and clay loam soil. The results showed that DMPP with ammonium sulphate nitrate （ASN）（（NH4）2SO4 and NHaNO3） or urea could reduce NO3^--N leaching significantly, whereas ammonium （NH4^＋-N） leaching increased slightly. In case of total N （NO3^--N＋NH4^＋-N）, losses by leaching during the experimental period （40 d） were 37.93 mg （urea）, 31.61 mg （urea＋DMPP）, 108.10 mg （ASN）, 60.70 mg （ASN＋DMPP） in the sandy loam soil, and 30.54 mg （urea）, 21.05 mg （urea＋DMPP）, 37.86 mg （ASN）, 31.09 mg （ASN＋DMPP） in the clay loam soil, respectively. DMPP-amended soil led to the maintenance of relatively high levels of NH4^＋ -N and low levels of NO3^--N in soil, and nitrification was slower. DMPP supplementation also resulted in less potassium leached, but the difference was not significant except the treatment of ASN and ASN＋DMPP in the sandy loam soil. Above results indicate that DMPP is a good nitrification inhibitor, the efficiency of DMPP seems better in the sandy loam soil than in the clay loam soil and lasts longer.

关键词： 3,4-dimethylpyrazole phosphate (DMPP) nitrate potassium leaching sandy loam soil clay loam soil

Quantitative and Spatially Resolved Measurement of Atomic Potassium in Combustion Using Diode Laser

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Chinese Physics Letters 2018年第2期35卷 21-24页

作者： qiang Gao wu-Bin Weng Bo Li zhong-Shan Li State Key Laboratory of Engines Tianjin UniversityTianjin 300072 Division of Combustion Physics Lund UniversityLund SE-22100Sweden

A compact optical setup for quantitative and spatially resolved measurement of atomic alkali concentration in combustion is *** diode laser absorption spectroscopy and laser-induced fluorescence are combined using a single continuous wave diode laser to measure the line-integration concentration and the relative distribution simultaneously,thereby obtaining the absolute concentration distribution along the laser *** results indicate the good performance of this method for one-dimensional quantitative measurement.

关键词： Combustion

A p-version embedded model for simulation of concrete temperature fields with cooling pipes

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Water Science and Engineering 2015年第3期8卷 248-256页

作者： Sheng qiang Zhi-qiang Xie Rui zhong College of Water Conservancy and Hydropower Engineering Hohai University Lyles School of Civil Engineering Purdue University Department of Material and Structure Changjiang River Scientific Research Institute School of Engineering University of Connecticut

Pipe cooling is an effective method of mass concrete temperature control, but its accurate and convenient numerical simulation is still a cumbersome problem. An improved embedded model, considering the water temperature variation along the pipe, was proposed for simulating the temperature field of early-age concrete structures containing cooling pipes. The improved model was verified with an engineering example. Then, the p-version self-adaption algorithm for the improved embedded model was deduced, and the initial values and boundary conditions were examined. Comparison of some numerical samples shows that the proposed model can provide satisfying precision and a higher efficiency. The analysis efficiency can be doubled at the same precision, even for a large-scale element. The p-version algorithm can fit grids of different sizes for the temperature field simulation. The convenience of the proposed algorithm lies in the possibility of locating more pipe segments in one element without the need of so regular a shape as in the explicit model.

关键词： Concrete temperature field Cooling pipe Embedded model p-version Numerical simulation

Handedness-inverted polymorphic helical assembly and circularly polarized luminescence of chiral platinum complexes

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Science China Chemistry 2021年第5期64卷 788-799页

作者： zhong-Liang Gong Yu-wu zhong Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of PhotochemistryCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190China School of Chemical Sciences University of Chinese Academy of SciencesBeijing 100049China

Circularly polarized luminescence(CPL)materials have potential applications in three-dimensional(3D)displays,quantum encryption,and optical *** development of single-component CPL materials with polymorphic assembly and handedness inversion remains a significant ***,we present the access of such materials by controlling the underlying assembly pathway of well-designed chiral emitters.A pair of enantiomeric platinum complexes(R)-1 and(S)-1 decorated with a chiralα-methylbenzyl isocyanide ligand were *** using the mixed-solvent(THF/n-hexane,THF=tetrahydrofuran)or high-concentration condition,these complexes were found to assemble via a cooperative or isodesmic pathway with significantly enhanced yellow or red emission,*** aggregate samples obtained via these conditions show efficient CPL(dissymmery factor|glum|>0.02,emission quantum yieldΦ>20%).Interestingly,different assembly pathway leads to helical nanoribbons or nanofibers with opposite handedness from the complex with the same molecular *** has been unambiguously and consistently manifested by circular dichroism and CPL spectral analysis and transmission electron,scanning electron,and atomic force microscope *** work demonstrates an appealing example of constructing polymorphic helical architectures with highly efficient CPL and inverted handedness thanks to the excellent assembly and emission of platinum complexes.

关键词： self-assembly nanostructures circularly polarized luminescence chiral materials platinum complexes

Variable Clearance Characteristics of High Subsonic Compressor Cascades with Blade Tip Winglets

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Journal of Thermal Science 2022年第2期31卷 495-510页

作者： wu Wanyang zhong Jingjun Merchant Marine College Shanghai Maritime UniversityShanghai 201306China

The gas turbine is the main power equipment for naval ship and special civil ship,while the compressor is one of the core structures of the gas *** existing tip clearance could prevent the compressor blade and casing ***,the flow loss in the tip region caused by the tip clearance will degrade the performance of the *** improve the variable clearance characteristics of the high subsonic compressor cascades,the cascades with tip clearances of 1%,2%and 3%chord length are studied through experimental measurements and numerical *** research results prove that the pressure surface tip winglet can cause a significant improvement effect under most working *** the blade tip clearance size is gradually increasing within a reasonable range,the improvement effect becomes more remarkable,and the optimal tip winglet case *** tip clearance is 1%chord length,the PTW1.0 case(the width of the pressure surface tip winglet is 1.0 time of the original tip)reduces the flow loss by 3.09%compared with the NTW case(No Tip Winglet).When tip clearance is 2%chord length,the flow loss of PTW1.5 case(the width of the pressure surface tip winglet is 1.5 times of the original tip)is reduced by 3.46%.When tip clearance is 3%chord length,all alternative tip winglets reduce the total pressure loss,and PTW2.0 case(the width of the pressure surface tip winglet is 2.0 times of the original tip)is the best choice,which has a 6.53%degree of improvement.

关键词： high subsonic compressor blade tip winglet tip clearance pressure surface experimental measurement

VO_2(B) Nanosheets as a Cathode Material for Li-ion Battery

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Journal of Materials Science & Technology 2015年第6期31卷 630-633页

作者： qiang Wang Jing Pan Ming Li Yuanyuan Luo Hao wu Li zhong Guanghai Li Key Laboratory of Materials Physics Anhui Key Laboratory of Nanomaterials and NanotechnologyInstitute of Solid State PhysicsChinese Academy of Sciences

VO2（B） nanosheets were prepared by a liquid-phase exfoliation from VO2（B） *** lithium storage properties of VO2（B） nanosheets as capacity cathode materials for rechargeable lithium secondary batteries were *** was found that the nanosheets with the thickness of several nanometers and width of tens of nanometer had a preferential growth direction along[001]*** comparing with VO2（B） bulk,the VO2（B） nanosheets showed a higher initial discharge capacity and a slower capacity fading *** reasons for these phenomena were discussed and analyzed.

关键词： Liquid-phase exfoliation VO2(B) nanosheets Li-ion