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Chinese Chemical Letters 2014年第2期25卷 283-286页

作者： Jing Li Min Yang zun-biao jiang School of Chemistry and Chemical Engineering Xuzhou Institute of Technology

N-doped TiO2 （N-TiO2） nanoparticles were synthesized via a one-step low temperature （180℃） solvothermal route, which adopted NH4NO3 as the nitrogen source. The structure, composition, BET specific surface area, and optical properties of the as-synthesized product were characterized by X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, N2 adsorption- desorption isotherms, and UV-vis diffuse reflectance spectroscopy. In addition, its photocatalytic properties were tested by the reduction of aqueous Cr（VI） under UV and visible light （x 〉 420 rim） irradiation. It was observed that for the reduction of aqueous Cr（VI）, the as-synthesized N-TiO2 nanoparticles not only exhibited much higher photocatalytic activity than P25 TiO2 under UV light, but also exhibited remarkably high photocatalytic activity under visible light （λ 〉 420 nm）.

关键词： vNanoparticles Semiconductors Functional Powder technology

Study of the Transport Behavior of Multispherical Proppant in Intersecting Fracture Based on Discrete Element Method

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Energy Engineering 2025年第1期122卷 185-201页

作者： Chengyong Peng JianshuWu Mao jiang biao Yin Yishan Lou CNOOC Research Institute Company Limited Beijing100028China School of Petroleum Engineering Yangtze UniversityWuhan430100China Hubei Key Laboratory of Oil and Gas Drilling and Production Engineering(Yangtze University) Wuhan430100China

To analyze the differences in the transport and distribution of different types of proppants and to address issues such as the short effective support of proppant and poor placement in hydraulically intersecting fractures,this study considered the combined impact of geological-engineering factors on *** reservoir production parameters and the discrete elementmethod,multispherical proppants were ***,a 3D fracture model,based on the specified conditions of the L block,employed coupled(Computational Fluid Dynamics)CFD-DEM(Discrete ElementMethod)for joint simulations to quantitatively analyze the transport and placement patterns of multispherical proppants in intersecting *** indicate that turbulent kinetic energy is an intrinsic factor affecting proppant ***,the efficiency of placement and migration distance of low-sphericity quartz sand constructed by the DEM in the main fracture are significantly reduced compared to spherical ceramic proppants,with a 27.7%decrease in the volume fraction of the fracture surface,subsequently affecting the placement concentration and damaging fracture *** to small-angle fractures,controlling artificial and natural fractures to expand at angles of 45°to 60°increases the effective support length by approximately 20.6%.During hydraulic fracturing of gas wells,ensuring the fracture support area and post-closure conductivity can be achieved by controlling the sphericity of proppants and adjusting the perforation direction to control the direction of artificial fractures.

关键词： Hydraulic fracturing discrete element method proppant sphericity CFD-DEM

有限元分析不同程度冈上肌断裂对肩关节应力的影响

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中国组织工程研究 2025年第9期29卷 1768-1774页

作者：徐彪路坦姜亚琼阴玉娇新乡医学院第一附属医院河南省卫辉市453100

背景:目前研究冈上肌的精细解剖及各亚区域的生物力学表现的实验较多,但是对冈上肌不同区域的损伤所带来的肩关节应力的影响鲜有耳闻。很有必要了解不同区域的冈上肌损伤对关节软骨及关节盂的应力大小及分布的影响,从而给临床诊治提供... 详细信息

背景:目前研究冈上肌的精细解剖及各亚区域的生物力学表现的实验较多,但是对冈上肌不同区域的损伤所带来的肩关节应力的影响鲜有耳闻。很有必要了解不同区域的冈上肌损伤对关节软骨及关节盂的应力大小及分布的影响,从而给临床诊治提供一些理论支持。目的:探究在三维有限元软件中模拟不同程度的冈上肌断裂对肱骨软骨面、关节盂唇及关节盂软骨关节面的最大应力值。方法:获取正常健康的肩关节CT或MRI导入Mimics、Geomagic进行提取模型,再通过Soildworks对模型构建,再对各个模型的冈上肌进行不同程度的损伤,模拟出不同区域的断裂。最后导入机械软件Ansys,进行三维有限元生物力学分析,计算肱骨软骨面、关节盂唇及关节盂软骨关节面的应力数值。结果与结论:①随着冈上肌损伤程度的加重肩关节软骨面及盂唇的应力也会增加;②冈上肌前部在各区域中最为重要;③不同程度的冈上肌断裂对肩关节盂唇面的软骨应力大小有影响,而应力的分布区域无明显改变;④提示肩关节水平外展起始时,前部发挥着重要的作用,其次为后部深区;当冈上肌前部损伤时肩关节软组织应力增加明显,还容易引起关节盂唇顶部及关节盂软骨前下方的损伤。

关键词：冈上肌肩关节关节盂生物力学有限元分析

General formalism for dirty extreme-mass-ratio inspirals

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Science China(Physics,Mechanics & Astronomy) 2024年第7期67卷 22-29页

作者： Ye jiang Wen-biao Han Shanghai Astronomical Observatory Chinese Academy of SciencesShanghai 200030China School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 100049China School of Fundamental Physics and Mathematical Sciences Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou 310024China Shanghai Frontiers Science Center for Gravitational Wave Detection Shanghai 200240China

Detecting the environment around the supermassive black holes and tests of general relativity are important applications of extreme-mass-ratio inspirals(EMRIs).There is still a challenge to efficiently describe various“dirty”impacts on the inspirals,such as dark matter,gas,dipole radiation,and electromagnetic *** this study,we find the inherent linearity of the asymptotic solution of the inhomogeneous Teukolsky *** the basis of this property,we completely decouple the factors of the perturber and the background spacetime in the energy fluxes and *** the new decoupling form,the waveforms of EMRIs with non-geodesic motion in Kerr spacetime can be conveniently *** will help to resolve the environment(including gas,field,dark matter,electromagnetic interaction)around supermassive black holes and test general relativity.

关键词： gravitational wave Teukolsky equation extreme-mass-ratio inspirals

Influence of flocculant polyacrylamide on concentration of titanium white waste acid by direct contact membrane distillation

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Chinese Journal of Chemical Engineering 2020年第9期28卷 2483-2496页

作者： biao Hu Jintao Ouyang Lanying jiang School of Metallurgy and Environment Central South UniversityChangsha 410083China National Engineering Research Center for Control&TreatmentcfHeayy Metal Pollution Changsha 410083China Key Laboratory of Hunan Province for Water Environment and Agriculture Product Safety Changsha 410083China

Effort has been made to investigate the concentration of titanium white waste acid(TWWA) by direct contact membrane distillation(DCMD) and the focus is the influence of polyacrylamide(PAM) on membrane wetting and *** was found that the presence of PAM in feed reduced membrane flux and retarded wetting development,even though its level in feed of H2 SO4 solution was only 0.0002 wt%.The difference between the tests using pure water and neat PAM aqueous solution,respectively,as feed also indicated the above effect registered with *** results showed that the addition of PAM in feed solution changed the membrane shell surface ***,conclusive proof of the PAM existence in membrane cross-section and inner surface was not obtained,probably due to its low concentration in feed *** approaches were tried to recover membrane *** comparison with operation w/o any treatment,HCl solution rinsing did not lead to obvious improvement in membrane flux recovery,while rinsing combined with gas purge has clearly delayed the degradation in acid concentration ***,even the latter could not ensure long term *** tortuosity and low hydrophobicity of the membranes used were suggested as underlying causes and should be addressed in the future.

关键词： Acid concentration DCMD PAM Wetting Fouling

Simplified creation of polyester fabric supported Fe-based MOFs by an industrialized dyeing process: Conditions optimization, photocatalytics activity and polyvinyl alcohol removal

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Journal of Environmental Sciences 2022年第6期34卷 52-67页

作者： Liran Bian Yongchun Dong biao jiang Division of Textile Chemistry and Environmental Care School of Textile Science and EngineeringTiangong UniversityTianjin 300387China Key Laboratory of Advanced Textile Composite of Ministry of Education Tiangong UniversityTianjin 300387China

MIL-53(Fe) was successfully prepared and deposited on the surface carboxylated polyester(PET) fiber by an optimized conventional solvothermal or industrialized high temperature pressure exhaustion(HTPE) process to develop a PET fiber supported MIL-53(Fe) photocatalyst(MIL-Fe@PET) for the degradation of polyvinyl alcohol(PVA) in water under light emitting diode(LED) visible irradiation. On the basis of several characterizations, MIL-Fe@PET was tested for the photocalytic ability and degradation mechanism. It was found that temperature elevation significantly enhanced the formation and deposition of MIL-53(Fe) with better photocatalytic activity. However, higher temperature than 130℃ was not in favor of its photocatalytic activity. Increasing the number of surface carboxyl groups of the modified PET fiber could cause a liner improvement in MIL-53(Fe) loading content and photocatalytic ability. High visible irradiation intensity also dramatically increased photocatalytic ability and PVA degradation efficiency of MIL-Fe@PET. Na_(2)S_(2)O_(8) was used to replace H_(2)O_(2) as electron acceptor for further promoting PVA degradation in this system. MIL-Fe@PET prepared by HTPE process showed higher MIL-53(Fe) loading content and slightly lower PVA degradation efficiency than that prepared by solvothermal process at the same conditions. These findings provided a practical strategy for the large-scale production of the supported MIL-53(Fe) as a photocatalyst in the future.

关键词： MIL-53(Fe) Polyester fabric Exhaustion dyeing Visible light photocatalyst Polyvinyl alcohol removal

Higher-order smooth positons and breather positons of Sine-Gordon equation

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Communications in Theoretical Physics 2022年第8期74卷 51-55页

作者： Lin jiang biao Li School of Mathematics and Statistics Ningbo UniversityNingbo 315211China

According to the N-soliton solution derived from Hirota's bilinear method,higher-order smooth positons and breather positons are obtained efficiently through an ingenious limit *** paper takes the Sine-Gordon equation as an example to introduce how to utilize this technique to generate these higher-order smooth positons and breather positons in *** dynamical behaviors of smooth positons and breather positons are presented by some *** the procedure of deduction,the approach mentioned has the strengths of concision and *** terms of feasibility and practicability,this approach can be exploited widely to study higherorder smooth positons and breather positons of other integrable systems.

关键词： Hirota's bilinear method smooth positons breather positons

Geochemistry, Monazite U–Pb Dating, and Li–Nd Isotopes of the Madi Rare Metal Granite in the Northeastern Part of the North China Craton

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Acta Geologica Sinica(English Edition) 2019年第4期93卷 901-911页

作者： HOU jianglong jiang biao DAI Hongzhang MNR Key Laboratory of Metallogeny and Mineral Assessment Institute of Mineral ResourcesChinese Academy of Geological SciencesBeijing 100037China

The Madi rare metal granite is a complex massif,which contains a variety of rare metals,such as Nb,Ta,Li,and *** this paper,the geochemical characteristics of the granite were obtained by multi-collector inductively coupled mass spectrometry(MC-ICP-MS).The precise crystalline age of the granite was obtained from monazite U-Pb dating,and the source of the granite was determined using Li-Nd *** Madi rare metal granite is a high-K(calc-alkaline),peraluminous,S-type *** U-Pb monazite age indicates that the crystalline age of the granite is 175.6 Ma,which is Early *** granite is characterized by a relatively wide range ofδ7 Li values(+2.99‰to+5.83‰)and high lithium concentrations(181 ppm to 1022 ppm).The lithium isotopic composition of the granite does not significantly correlate with the degree of magmatic *** insignificant amount of lithium isotope fractionation occurred during the granitic *** lithium isotopic composition of the granite significantly differs from that of the wall rock,but it is very similar to that of a primitive mantle peridotite xenolith(meanδ7 Li value+3.5‰).The plot of Li concentration versusδ7 Li indicates that the Li isotopic composition of the granite is similar to that of island arc *** on the above-described evidence,the granite was mainly derived from the crust,but it was contaminated by a deep granitic magma.

关键词： geochemistry U-Pb monazite age Li-Nd isotopes crystallization age magmatic source Madi rare metal granite

Strategies for synthesizing non-bioaccumulable alternatives to PFOA and PFOS

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Chinese Chemical Letters 2015年第5期26卷 491-498页

作者： Min Sha Ping Xing biao jiang School of Chemical Engineering Nanjing University of Science and Technology CAS Key Laboratory of Synthetic Chemistry of Natural Substances Shanghai Institute of Organic ChemistryChinese Academy of Sciences

This minireview describes the strategies for synthesis of fluorinated surfactants potentially non- bioaccumulable. Various strategies have been focused on （Ⅰ） reducing the length of the perfluorocarbon chain, （Ⅱ） introducing hereto atoms into the fluorocarbon chain, （Ⅲ） introducing branch （herein and after branch means the fluoro-carbon chain section is not straight）. In most cases, the surface tensions versus the surfactant concentrations have been assessed. These above strategies led to various highly fluorinated （perfluorinated or not perfluorinated） surfactants whose chemical changes enabled to obtain novel alternatives to perfluorooctanoic acid （PFOA） and perfluorooctane sulphonate （PFOS）.

关键词： Fluorinated surfactant PFOA PFOS Alternative Surface tension

Palladium-Catalyzed Three-Component Coupling Reaction of Allyl Carboxylates, Norbornenes and Diboronates InvoIving Sequential Olefins Insertion and Borylation Reaction

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Chinese Journal of Chemistry 2019年第2期37卷 140-147页

作者： zun Li Jia Zheng Chunsheng Li Wanqing Wu Huanfeng jiang Key Laboratory of Functional Molecular Engineering of Guangdong Province School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhouGuangdong 510640China

Summary of main observation and conclusion An efficient Pd-catalyzed three-component coupling reaction of allyl carboxylates, norbornenes and diboronates is described, which allows efficient assembly of C(sp3)-C(sp3) and C(sp3)-B bonds in a single process. Moreover, this approach shows advantages of good chemo- and regioselectivity, as well as good substrates suitability.

关键词： Palladium-Catalyzed Three-Component Coupling Reaction Allyl Carboxylates