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Petroleum Science 2022年第2期19卷 916-926页

作者： Jing-Ping Liu xian-fa zhang Wen-Chao zhang Kai-He Lv Yin-Rui Bai Jin-Tang Wang xian-Bin Huang Jia-Feng Jin Jin-Sheng Sun College of Petroleum Engineering China University of Petroleum(East China)Qingdao 266580China CNPC Engineering Technology R&D Company Limited Beijing 102206China

Drilling fluids face failure during drilling deep reservoir with high temperature and high *** experimental results show that high temperature and salinity reduce the negative charge on the surface of bentonite in the drilling fluid and cause the coalescence of bentonite *** a result,the particles coalesce,the grid structure is destroyed,and the rheological properties,rock-carrying capacity and filtration properties are *** resolve the foregoing,in this study,0.05-wt%carbon nanotubes are introduced into a 4%bentonite drilling fluid under conditions where the temperature and concentration of added Na Cl reach 180°C and 10 wt%,*** carbon nanotubes adsorb on the bentonite surface and increase the space among bentonite *** steric hindrance prevents the coalescence of bentonite in high temperature and high salt *** bentonite maintains the small size distribution of bentonite and supports the bentonite grid structure in the drilling *** a result,the rock-carrying capacity of the drilling fluid increases by 85.1%.Moreover,the mud cake formed by the accumulation of small-sized bentonite particles is dense;consequently,the filtration of bentonite drilling fluid reduced by 30.2%.

关键词： High temperature Water-based drilling fluid High salinity Carbon nanotube Deep resources

ZnO/PANI nanoflake arrays sensor for ultra-low concentration and rapid detection of NO_(2)at room temperature

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Rare Metals 2023年第2期42卷 536-544页

作者： Qiu-Yue Zheng Meng Yang Xin Dong xian-fa zhang Xiao-Li Cheng Li-Hua Huo Zoltán Major Ying-Ming Xu Key Laboratory of Functional Inorganic Material Chemistry Ministry of EducationSchool of Chemistry and Materials ScienceHeilongjiang UniversityHarbin150080China Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education School of Chemistryand State Key Laboratory of Optoelectronic Materials and TechnologiesSun Yat-Senen UniversityGuangzhou510275China Institute of Polymer Product Engineering Johannes Kepler University Linz124040LinzAustria

With the development of environmental monitoring,it is urgent to establish NO_(2)sensor with good sensing *** with the traditional NO_(2)sensors made of metal oxides,NO_(2)sensors made of n-p heterostructure nanocomposites have good sensing performance in detection limit and operating *** nanoflake arrays with polyaniline film grown on the surface were prepared on ceramic tubes by hydrothermal and vapor diffusion *** gas-phase diffusion method can control the heterostructure by adjusting the diffusion *** room temperature(25℃),the construction of rich n-p heterogeneous interface enables the sensor prepared by the nanocomposite to respond to NO_(2),showing the sensing performance with the response value of 28.00 to10.00×10^(-6)NO_(2);the detection limit improved to0.01×10^(-6)and the recovery time of 18 *** this work,the sensing mechanism of NO_(2)at heterogeneous interface is analyzed,which provides a promising material for the detection of low concentration NO_(2)at room temperature.

关键词： ZnO/polyaniline(PANI)nanoflake arrays n-p heterostructure Ultra-low concentration NO_(2)gas sensor Rapid detection

Notoginsenoside as an environmentally friendly shale inhibitor in water-based drilling fluid

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Petroleum Science 2022年第2期19卷 608-618页

作者： Jin-Sheng Sun Zong-Lun Wang Jing-Ping Liu Kai-He Lv fan zhang Zi-Hua Shao Xiao-Dong Dong Zhi-Wen Dai xian-fa zhang College of Petroleum Engineering China University of Petroleum(East China)Qingdao266580ShandongPeople's Republic of China Key Laboratory of Unconventional Oil&Gas Development(China University of Petroleum(East China)) Ministry of EducationQingdao266580ShandongPeople's Republic of China

The demand for non-toxic and biodegradable shale inhibitors is growing in the drilling *** this paper,the effect of notoginsenoside(NS)as a new,environmentally friendly inhibitor of shale hydration is systematically studied for the first *** inhibition performance of NS was evaluated via inhibition evaluation tests,including mud ball immersion tests,linear expansion tests,shale rolling recovery tests,and compressive strength *** inhibition mechanism of NS was analyzed using Fourier transform infrared spectroscopy(FTIR),contact angle measurements,particle size distribution determination,thermogravimetric analysis(TGA),and scanning electron microscopy(SEM).The experimental results demonstrate that NS is able to adhere to the clay surface,forming a hydrophobic film that prevents the entry of water molecules and inhibiting the hydration dispersion of the *** of this,NS can maintain the original state of bentonite pellets in water,which can effectively reduce the swelling rate of bentonite,increase the recovery rate of shale drill cuttings,maintain the strength of the shale,and therefore maintain the stability of the borehole wall during *** addition,NS is non-toxic,degradable,and compatible with water-based drilling *** above advantages make NS a promising candidate for use as an environmentally friendly shale inhibitor.

关键词： Notoginsenoside Shale inhibition Environmentally friendly Water-based drilling fluid Inhibition mechanism

Er_(2)O_(3) nanospheres with fast response to humidity for non-contact sensing

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Rare Metals 2023年第1期42卷 56-63页

作者： Yi-fan Jiang Chuan-Yu Guo xian-fa zhang Xiao-Li Cheng Li-Hua Huo Ting-Ting Wang Ying-Ming Xu Key Laboratory of Functional Inorganic Material Chemistry Ministry of Education of the People’s Republic of ChinaHeilongjiang UniversityHarbin150080China

As a kind of lanthanide oxide functional material,Er_(2)O_(3) as aroused widespread scientific interest due to its exceptional properties;however,its humidity sensing performance remains to be ***,the rational designed Er_(2)O_(3) anospheres were prepared by one-step solvothermal and high-temperature calcined *** structure and morphology of the samples were analyzed by X-ray diffractometer(XRD),scanning electron microscope(SEM)and transmission electron microscope(TEM),and the effect of calcination temperatures on humidity sensing characteristics was also investigated.

关键词： method. spheres diffractometer

Sensing mechanism of Ag/α-MoO_(3) nanobelts for H_(2)S gas sensor

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Rare Metals 2021年第6期40卷 1545-1553页

作者： Shi-Kai Shen Xin-Lei Cui Chuan-Yu Guo Xin Dong xian-fa zhang Xiao-Li Cheng Li-Hua Huo Ying-Ming Xu School of Electrical Engineering Suihua UniversitySuihua 152000China Key Laboratory of Functional Inorganic Material Chemistry Ministry of Education of the People’s Republic of ChinaHeilongjiang UniversityHarbin 150080China Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education Guangdong Engineering Technology Research Center for High-Performance Organic and Polymer Photoelectric Functional FilmsSchool of ChemistrySun Yat-Sen UniversityGuangzhou 510275China

Sensing mechanism is still a big problem in the field of gas ***-depth study of the sensing mechanism can provide better ideas for the design of sensing materials,and it is also more conducive to the improvement in gas-sensing *** this work,Ag/α-MoO_(3) material was obtained by loading Ag in α-MoO_(3) nanobelts prepared by hydrothermal *** material was characterized by field electron scanning electron microscopy(SEM),high-resolution transmission electron microscopy(HRTEM),X-ray diffraction(XRD) and X-ray photoelectron spectroscopy(XPS).Comparing the gas sensing properties of α-MoO_(3) and Ag/α-MoO_(3),it is found that Ag effectively improves the selectivity of the material to H_(2)S at 133℃.The response of the 5 wt% Ag/α-MoO_(3) sensor to 100 × 10-6 hydrogen sulfide(H_(2)S) is 225 and the detection limit is 100 ×10^(-9).The sensing mechanism was verified by gas chromatography and mass spectrometer(GC-MS),XPS and Fourier transform infrared spectroscopy(FTIR).

关键词： Ag/α-MoO_(3) Nanobelt Gas sensor Hydrogen sulfide Sensing mechanism

Synthesis and mechanism of environmentally friendly high temperature and high salt resistant lubricants

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Petroleum Science 2023年第5期20卷 3110-3118页

作者： Zong-Lun Wang Jin-Sheng Sun Jing-Ping Liu Kai-He Lv Zi-Hua Shao xian-fa zhang Zhe Xu Zhi-Wen Dai Ning Huang School of Petroleum Engineering China University of Petroleum(East China)Qingdao 266580ShandongChina CNPC Engineering Technology R&D Company Limited Beijing 102206China

With the exploration and development of deep and ultra-deep oil and gas,high torque and high friction during the drilling of deep and ultra-deep wells become one of the key issues affecting drilling safety and drilling ***,the high temperature and high salt problem in deep formations is prominent,which poses a major challenge to the lubricity of drilling fluids under high temperature and high *** paper reports an organic borate ester SOP as an environmentally friendly drilling fluid *** performance evaluation results show that when 1%lubricant SOP is added to the fresh water-based mud,the lubrication coefficient decreases from 0.631 to 0.046,and the reduction rate of lubrication coefficient is 92.7%.Under the conditions of 210℃ and 30%NaCl,the reduction rate of lubricating coefficient of the base slurry with 1%SOP was still remain 81.5%.After adding 1%SOP,the wear volume decreased by 94.11%compared with the base *** contact resistance experiment during the friction process shows that SOP can form a thick adsorption film on the friction surface under high temperature and high salt conditions,thus effectively reducing the friction *** dynamics simulation shows that lubricant SOP can be physically adsorbed on the surface of drilling tool and borehole wall through hydrogen bond and van der Waals *** analysis further shows that SOP adsorbs on the friction surface and reacts with metal atoms on the friction surface to form a chemically reactive ***,under high temperature and high salt conditions,the synergistic effect of physical adsorption film and chemical reaction film effectively reduces the frictional resistance and wear of the friction *** addition,SOP is non-toxic and easy to ***,SOP is a highly effective and environmentally friendly lubricant in high temperature and high salt drilling fluid.

关键词： Deep oil and gas Lubricant Environmentally friendly Water-based drilling fluid Molecular dynamics simulations

PRETREATMENT FOR METALLIZATION OF PZT CERAMIC SURfaCES

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中国有色金属学会会刊：英文版 1993年第1期3卷 72-76页

作者： Shi.xian fa zhang.Xu Li.Xuejing Wang.Yue Wang.Li Liu.Yansheng Tongji University, Shanghai 200092, China

This paper describes the pretreatment process for metal[ization of PZT ceramics surfaces by electrolytic Ni plating which includes cleaning, roughening, sensitization and activation. The experimental procedure, result... 详细信息

关键词： PZT nickel cleaning roughening sensitization activation

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基于神经网络的导弹自适应滑模控制器设计

系统仿真学报 2008年第20期20卷 5589-5592页

作者：曾宪法张磊申功璋北京航空航天大学自动化科学与电气工程学院北京100083

针对导弹六自由度非线性模型,根据时标分离原理将导弹系统分为快慢不同的四个回路。针对快、慢回路,提出了一种基于神经网络的自适应滑模控制器设计方案。首先分别在快、慢回路中采用反馈线性化实现解耦控制,然后设计基于神经网络的自... 详细信息

针对导弹六自由度非线性模型,根据时标分离原理将导弹系统分为快慢不同的四个回路。针对快、慢回路,提出了一种基于神经网络的自适应滑模控制器设计方案。首先分别在快、慢回路中采用反馈线性化实现解耦控制,然后设计基于神经网络的自适应滑模控制器来保证系统鲁棒性及性能,其中神经网络用来逼近系统的不确定性。理论分析及计算机仿真都表明,按照该方法设计的控制器不仅具有较强的鲁棒性,而且保证了闭环系统的渐近稳定性。

关键词：导弹神经网络自适应控制滑模控制

Insights into spinal muscular atrophy from molecular biomarkers

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Neural Regeneration Research 2025年第7期20卷 1849-1863页

作者： Xiaodong Xing Xinzhu Liu xiandeng Li Mi Li xian Wu Xiaohui Huang Ajing Xu Yan Liu Jian zhang Department of Clinical Pharmacy Xinhua HospitalShanghai Jiao Tong University School of MedicineShanghaiChina College of Pharmacy Chongqing Medical UniversityChongqingChina

Spinal muscular atrophy is a devastating motor neuron disease characterized by severe cases of fatal muscle *** is one of the most common genetic causes of mortality among infants aged less than 2 *** research is currently receiving more attention,and new candidate biomarkers are constantly being *** review initially discusses the evaluation methods commonly used in clinical practice while briefly outlining their respective pros and *** also describe recent advancements in research and the clinical significance of molecular biomarkers for spinal muscular atrophy,which are classified as either specific or non-specific *** review provides new insights into the pathogenesis of spinal muscular atrophy,the mechanism of biomarkers in response to drug-modified therapies,the selection of biomarker candidates,and would promote the development of future ***,the successful utilization of biomarkers may facilitate the implementation of gene-targeting treatments for patients with spinal muscular atrophy.

关键词： biomarkers disease progression gene-targeting therapy neurofilaments Nusinersen spinal muscular atrophy(SMA) survival motor neuron therapeutic evaluation treatment outcomes

Physarum polycephalum-inspired adaptive optimization design of artificial microtubular networks

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Science China Chemistry 2025年

作者： Si-Min Zeng Di-Wei Zheng Ting Pan Xing-Lan Ding Yun zhang Chi-Hui Yang Si-Xue Cheng xian-Zheng zhang Key Laboratory of Biomedical Polymers of Ministry of Education&Department of Chemistry Wuhan University

Natural biological microtubular networks have undergone adaptive evolutionary selection and may offer viable solutions to design challenges in artificial microtubular networks. The plasmodium of the slime mold Physarum polycephalum(P. polycephalum) extends continuously to form a protoplasmic microtubular network structure, directly connecting food *** simulations revealed that the formation of this adaptive P. polycephalum microtubular network could be captured by a mathematical algorithm. Inspired by the P. polycephalum microtubular networks, we propose an adaptive optimization design method for artificial microtubular networks. Specifically, we utilized hydrogels with biodegradable and tissue-adhesive properties to replicate the P. polycephalum microtubular networks via photomask. In Rhodamine B diffusion and glucosecatalyzed reaction experiments, we found that the P. polycephalum microtubular networks exhibited significantly enhanced efficiency compared to vascular and artificial networks. Furthermore, we demonstrated the potential for uric acid(UA) degradation of the hydrogels with a real P. polycephalum microtubular network loaded with urate oxidase(UOx) in a rodent model of hyperuricemia. And this network achieved more than double the effect of the artificial network. This underscores the potential of natural microtubular networks to replace artificial microtubular networks.

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