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Pore pressure fluctuations of overlying aquifer during residual coal mining and water-soil stress coupling analysis

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Mining Science and Technology 2009年第5期19卷 648-652页

作者： DONG Qing-hong SUI Wang-hua ZHANG Xiao-cui MAO zeng-min School of Resources and Geosciences China University of Mining ＆ Technology Xuzhou Jiangsu 221116 China School of Geology and Exploration Engineering Xinjiang University Urumqi Xinjiang 830046 China State Key Laboratory for Coal Resources and Mining Safety China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China

Three test models and a simulation model were constructed based on the prevailing conditions of the Taiping coalmine in order to analyze pore pressure fluctuations of an overlying aquifer during residual coal mining. As well, the relation between pore pressure and soil stress was evaluated. The model tests show the vibrations of pore pressure and soil stress as a result of mining activities. The simulation model tells of the response characteristics of pore pressure after mining and its distribution in the sand aquifer. The comparative analysis reveals that pore pressure and soil stress vibration are activated by unexpected events occurring in mines, such as collapsing roofs. An increased pore pressure zone always lies above the wall in front or behind the working face of a mine. Both pore pressure and vertical stress result in increasing and decreasing processes during movements of the working face of a mine. The vibration of pore pressure always precedes soil stress in the same area and ends with a sharp decline. Changes in pore pressure of sand aquifer are limited to the area of stress changes. Obvious changes are largely located in a very small frame over the mining face.

关键词： pore pressure fluctuations water-soil stress coupling analysis residual coal mining

Oleophobic interaction mediated slippery organogels with ameliorated mechanical performance and satisfactory fouling-resistance

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Journal of Materials Science & Technology 2022年第26期121卷 227-235页

作者： Liangpeng zeng Hongyuan cui Huilan Peng Xiaohang Sun Yi Liu Jingliang huang Xinxing Lin Hui Guo Wei-hua Li School of Chemical Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China School of Materials Science and Engineering Sun Yat-sen UniversityGuangzhou 510275China

Owing to their inherent semi-solid property and lubricant ability,organogels manifest various unique characteristics and serve as promising candidates for ***,the poor mechanical properties of organogels often limit their practical ***,we report a simple and effective method to prepare organogels with reinforced mechanical performance and surface lubricant ability with the synergistic roles played by oleophobic and oleophilic *** rigid oleophobic chains have a poor affinity to lubricating solvent,which gives rise to high oleophobic interactions between polymer networks;the soft oleophilic chains possess a high affinity to the low surface energy solvent,which lead to high solvent content to maintain the satisfactory lubricant *** organogel of oleophobic methyl methacrylate(MMA)and oleophilic lauryl methacrylate(LMA)is chosen as a representative example to illustrate this *** the optimal composition,the as-prepared organogels offer satisfactory tensile fracture stress,fracture strain,Young’s modulus,toughness,and tearing fracture energy of 480 k Pa,550%,202 k Pa,1.14 MJ m,and 5.14 k J m,respectively,which are far beyond the classical PLMA ***,the biofouling resistance tests demonstrate 4 to 9-fold reduction of protein and bacteria adhesion on the reinforced organogels surface in comparison to the glass substrate and solvent-free dry *** simple and effective approach to toughen organogels,we hope,can be applied in various fields with different practical functional requirements in the future.

关键词： Organogels Mechanical reinforcement Fouling-resistance Slippery surface

Continuous high-temperature rapid nanomanufacturing of electrocatalysts

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Nano Research 2025年第1期18卷 225-235页

作者： Xiaoyang Wang Ziyi Luo Baihua cui Ziqi Fu Yanchang Liu Weidi Liu Jia Ding Jianrong zeng Yanan ChenWenbin Hu School of Materials Science and Engineering Tianjin UniversityTianjin 300350China Australian Institute for Bioengineering and Nanotechnology The University of QueenslandSt.LuciaBrisbane 4072Australia Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China

Encapsulating metal nanoparticles in carbon shells(Metal@C)to enhance catalytic activity and stability has been certified ***,most existing methods for preparing Metal@C are complex,time-consuming,and lack of *** this study,a novel method that couples the high-temperature shock(HTS)with ultrasonic spray pyrolysis is reported,which can realize facile and scalable production of various Metal@C through the pyrolysis of glucose and metal chloride *** proposed HTS ultrasonic spray pyrolysis offers several advantages,including compact size,short reaction time(~120 ms),and uniform *** the Ni@C-40 nanocomposite as an example,the ultrasmall Ni nanoparticles(~10 nm)with thin carbon protective shells(~2 nm)are uniformly dispersed in the carbon matrix and applied for oxygen evolution reaction(OER)in alkaline *** Ni@C-40 optimized by tuning the thickness of carbon shell exhibits significantly enhanced OER activity with low overpotential of 242 mV at 10 mA·cm^(-2) and stability,which is attributed to the optimized interactions between Ni nanoparticles and carbon *** method also shows promise for continuous pyrolysis synthesis of various extreme materials at ultra-high temperatures using alternative electric heating materials.

关键词： ultrasonic spray pyrolysis high-temperature shock carbon shell oxygen evolution reaction Metal@C nanocomposite

Rotorcraft flight endurance estimation based on a new battery discharge model

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Chinese Journal of Aeronautics 2017年第4期30卷 1561-1569页

作者： Feng CHENG hua WANG Pin cui School of Astronautics Beihang University Beijing 100083 China Science and Technology on Space Physics Laboratory Beijing 100076 China

To avoid the numerical complexities of the battery discharge law of electric-powered rotorcrafts,this study uses the Kriging method to model the discharge characteristics of Li-Po batteries under standard conditions.A linear current compensation term and an ambient temperature compensation term based on radial basis functions are then applied to the trained Kriging model,leading to the complete discharged capacity-terminal voltage *** an orthogonal experimental design and a sequential method,the coefficients of the current and ambient temperature compensation terms are determined through robust *** endurance calculation model for electric-powered rotorcrafts is then established,based on the battery discharge model,through numerical *** tests show that the maximum relative error of the proposed discharged capacity-terminal voltage model at detection points is 0.0086,and that of the rotorcraft endurance calculation model is 0.0195,thus verifying their accuracy.A flight test further demonstrates the applicability of the proposed endurance model to general electric-powered rotorcrafts.

关键词： Kriging model Orthogonal experimental design Robust optimization Rotorcraft endurance Sequential method

Ultrasensitive label-free electrochemiluminescence immunosensor based on N-(4-aminobutyl)-N-ethylisoluminol-functionalized graphene composite

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Science China Chemistry 2015年第3期58卷 425-432页

作者： Jiangnan Shu Wen Shen hua cui CAS Key Laboratory of Soft Matter Chemistry Department of Chemistry University of Science and Technology of China

The electrochemiluminescence(ECL) behavior of N-(4-aminobutyl)-N-ethylisoluminol(ABEI)-functionalized graphene composite(ABEI-GC) modified on an indium tin oxide(ITO) electrode was studied. ABEI-GC exhibited excellent ECL activity. On this basis, a label-free ECL immunosensor was developed for the sensitive detection of human immunoglobulin G(h Ig G) by using ABEI-GC as the ECL nano-interface via a layer-by-layer assembly technique. ABEI-GC was first assembled onto an ITO electrode. Positively charged chitosan was then electrostatically adsorbed to the modified electrode. Finally, negatively charged antibody-coated gold nanoparticles were attached to the surface to form the ECL immunosensor. In the presence of h Ig G, h Ig G was captured by its antibody. In addition, an ECL signal was detected in the presence of H2O2 when a double potential was applied. The ECL immunosensor for the determination of h Ig G showed a linear range of 1.0×10-13–1.0×10-8 g/mL with a detection limit of 5.0×10-14 g/m L. This immunosensor has high sensitivity, wide linearity and good reproducibility. The superior sensitivity of the proposed ECL immunoassay mainly derives from the incorporation of ABEI-GC, which not only improves the ECL intensity, response speed, and stability, but also provides a large specific surface for high levels of protein loading. This work reveals that ABEI-GC is good nano-interface for the construction of ECL biosensors. Our strategy is promising for protein detection and may open up a new avenue for ultrasensitive label-free immunoassays.

关键词： N-(aminobutyl)-N-(ethylisoluminol)(ABEI) graphene electrochemiluminescence immunosensor

基于PERK-eIF2α-NF-κB信号通路研究苁蓉散治疗阿尔茨海默病的作用机制

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中国药理学通报 2025年第1期41卷 80-87页

作者：王曦龙清华蔡元钦王政喻陈显兵曾楚华湖北民族大学医学部湖北恩施445000 湖北民族大学风湿性疾病发生与干预湖北省重点实验室湖北恩施445000 云南中医药大学基础医学院云南昆明650000

目的基于PERK-eIF2α-NF-κB信号通路研究苁蓉散治疗阿尔茨海默病(Alzheimer’s disease,AD)的作用机制。方法将60只SD大鼠分为正常组,模型组、苁蓉散组(4.62、9.24、18.48 g·kg-1)和安理申组,每组10只。除正常组外其余大鼠组予双侧海... 详细信息

目的基于PERK-eIF2α-NF-κB信号通路研究苁蓉散治疗阿尔茨海默病(Alzheimer’s disease,AD)的作用机制。方法将60只SD大鼠分为正常组,模型组、苁蓉散组(4.62、9.24、18.48 g·kg-1)和安理申组,每组10只。除正常组外其余大鼠组予双侧海马注射Aβ1-42建立AD模型。灌胃结束后进行水迷宫行为学检测学习记忆能力;尼氏染色观察神经元及尼氏小体变化;免疫荧光检测NF-κB核转移情况;透射电镜观察大鼠海马区内质网形态;酶免疫测定Aβ1-42及炎症因子含量;Western blot检测PERK、eIF2α、NF-κB的蛋白表达水平。结果水迷宫结果显示,苁蓉散能提高AD大鼠的逃避潜伏期时间、增加穿越求生平台次数、延长目标象限停留时间(P<0.05或P<0.01);尼氏染色结果显示,苁蓉散各剂量组神经元细胞排列较整齐,胞核存在,尼氏小体较为丰富;免疫荧光表明,苁蓉散可降低AD大鼠脑内NF-κB入核表达(P<0.05或P<0.01);透射电镜结果显示,苁蓉散各剂量组内质网形态整齐、未见明显扩张,结构正常;ELISA结果表明,苁蓉散可降低AD海马中的Aβ1-42,IL-1,TNF-α的含量;Western blot结果显示,苁蓉散各剂量组p-PERK/PERK,p-eIF2α/eIF2α,p-NF-κB p65/NF-κB p65的蛋白比值明显下降(P<0.05或P<0.01)。结论苁蓉散可通过抑制PERK-eIF2α-NF-κB信号通路的活化,缓解神经元细胞ERS状态下免疫炎症反应,以改善AD大鼠的认知功能。

关键词：阿尔兹海默病苁蓉散内质网应激 PERK-eIF2α-NF-κB信号通路炎症 Aβ1-42

Highly chemiluminescent magnetic mesoporous carbon composites Fe_3O_4@void@C with yolk-shell structure

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Science China Chemistry 2018年第9期61卷 1143-1150页

作者： Rui Yang Shaomin Liu hua cui CAS Key Laboratory of Soft Matter Chemistry Collaborative Innovation Center of Chemistry for Energy Materials (iChEM)Department of Chemistry University of Science and Technology of China

In this work,highly chemiluminescent magnetic mesoporous carbon with yolk-shell structure was synthesized by encapsulating N-(4-aminobutyl)-N-ethylisoluminol(ABEI)and Co^(2+)into the magnetic mesoporous carbon composites(Co^(2+)-ABEI-Fe_3O_4@void@C).The synthetic Co^(2+)-ABEI-Fe_3O_4@void@C showed a good magnetic separation property,which could remove residual ABEI molecules and Co^(2+)in less than 3 min under an external ***,the synthetic Co^(2+)-ABEI-Fe_3O_4@void@C demonstrated good chemiluminescence(CL)property and good stability when interacted with alkaline H_2O_*** CL intensity of such Co^(2+)-ABEI-Fe_3O_4@void@C was about 120 times higher than that of ABEI-Fe_3O_4@void@*** Co^(2+)-ABEI-Fe_3O_4@void@C also exhibited good electrochemiluminescence(ECL)property in alkaline *** outstanding CL/ECL performance of the Co^(2+)-ABEI-Fe_3O_4@void@C was attributed to the Co^(2+)immobilized in the Co^(2+)-ABEI-Fe_3O_4@void@C,which catalyzed the decomposition of H_2O_2to generate O_2^(·-)and HO~·,expediting the CL/ECL *** synthetic Co^(2+)-ABEI-Fe_3O_4@void@C may be of great application for the development of new methodologies in bioanalysis.

关键词： N-(4-aminobutyl)-N-ethylisoluminol(ABEI) chemiluminescence(CL) yolk-shell magnetic mesoporous carbon

Preparation of Chlorinated Poly(propylene carbonate) and Its Distinguished Properties

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Chinese Journal of Polymer Science 2017年第9期35卷 1086-1096页

作者： Xi-hua cui Jing Jin Jie cui 赵桂艳姜伟 State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China University of Science and Technology of China Hefei 230026 China

Poly（propylene carbonate）（PPC）, the copolymerization product of carbon dioxide and propylene oxide, was chlorinated for the first time in our laboratory. Nuclear magnetic resonance （NMR） spectroscopy and ion chromatography test showed that chlorine atoms were successfully introduced onto the polymer chains of PPC. We named this newborn polymer material as chlorinated poly（propylene carbonate）（CPPC）. It is worth noting that the reaction conditions of the chlorination of PPC were quite mild, which could be easily and simply realized at industrial level. What is more important is that CPPC possessed many more distinguished properties in solubility, wettability, adhesiveness, and gas barrier compared with PPC. For example, the bonding strength of CPPC as thermal adhesive is nearly four times higher than that of PPC for wood, stainless steel and glass. The oxygen permeability coefficient of CPPC exhibits a decrease of 33% compared with that of PPC. Moreover, CPPC is quite stable in air, whereas it could be well biodegraded in soil compared with PPC. These results indicated that CPPC could be widely used in the fields of coating, adhesive, barrier materials and so on, which could greatly promote the development of PPC industry.

关键词： Poly(propylene carbonate) Chlorination Biodegradability Adhesive Gas barrier

A high wind geophysical model fuction for Quik SCAT wind retrievals and application to Typhoon IOKE

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Acta Oceanologica Sinica 2015年第7期34卷 65-73页

作者： ZOU Juhong zeng Tao cui Songxue National Satellite Ocean Application Service State Oceanic Administration

The geophysical model function （GMF） describes the relationship between a backscattering and a sea surface wind, and enables a wind vector retrieval from backscattering measurements. It is clear that the GMF plays an important role in an ocean wind vector retrieval. The performance of the existing Ku-band model function QSCAT-1 is considered to be effective at low and moderate wind speed ranges. However, in the conditions of higher wind speeds, the existing algorithms diverge alarmingly, owing to the lack of in situ data required for developing the GMF for the high wind conditions, the QSCAT-1 appears to overestimate the a0, which results in underestimating the wind speeds. Several match-up QuikSCAT and special sensor microwave/imager （SSM/I） wind speed measurements of the typhoons occurring in the west Pacific Ocean are analyzed. The results show that the SSM/I wind exhibits better agreement with the ＂best track＂ analysis wind speed than the QuikSCAT wind retrieved using QSCAT-1. On the basis of this evaluation, a correction of the QSCAT-1 model function for wind speed above 16 m/s is proposed, which uses the collocated SSM/I and QuikSCAT measurements as a training set, and a neural network approach as a multiple nonlinear regression *** order to validate the revised GMF for high winds, the modified GMF was applied to the QuikSCAT observations of Hurricane IOKE. The wind estimated by the QuikSCAT for Typhoon IOKE in 2006 was improved with the maximum wind speed reaching 55 m/s. An error analysis was performed using the wind fields from the Holland model as the surface truth. The results show an improved agreement with the Holland model wind when compared with the wind estimated using the QSCAT-1. However, large bias still existed, indicating that the effects of rain must be considered for further improvement.

关键词： geophysical model function high wind QuikSCAT neural network wind retrieval