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A micro-crosslinked amphoteric hydrophobic association copolymer as high temperature-and salt-resistance fluid loss reducer for water-based drilling fluids

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Petroleum Science 2024年第3期21卷 1980-1991页

作者： Jian Li yu-Xi Ji Xiao-Xiao Ni Kai-He Lv Xian-Bin Huang jin-Sheng Sun School of Petroleum Engineering China University of Petroleum(East China)Qingdao266580ShandongChina Key Laboratory of Unconventional Oil&Gas Development China University of Petroleum(East China)Qingdao26650ShandongChina Inspection and Testing Center of Huabei Oil Field Company PetroChinaRenqiu062552HebeiChina Drilling Fluid Research Institute CNPC Engineering Technology R&D Company LimitedBeijing102206China

During ultradeep oil and gas drilling,fluid loss reducers are highly important for water-based drilling fluids,while preparing high temperature-and salt-resistance fluid loss reducers with excellent rheology and filtration performance remains a ***,a micro-crosslinked amphoteric hydrophobic association copolymer(i.e.,DADC)was synthesized using N,N-dimethyl acrylamide,diallyl dimethyl ammonium chloride,2-acrylamido-2-methylpropane sulfonic acid,hydrophobic monomer,and pentaerythritol triallyl ether *** to the synergistic effects of hydrogen bonds,electrostatic interaction,hydrophobic association,and micro-crosslinking,the DADC copolymer exhibited outstanding temperature-and *** rheological experiments have shown that the DADC copolymer had excellent shear dilution performance and a certain degree of salt-responsive viscosity-increasing *** DADC copolymer could effectively adsorb on the surface of bentonite particles through electrostatic interaction and hydrogen bonds,which bring more negative charge to the bentonite,thus improving the hydration and dispersion of bentonite particles as well as the colloidal stability of the drilling ***,the drilling fluids constructed based on the DADC copolymer exhibited satisfactory rheological and filtration properties(FLHTHP=12 m L)after aging at high temperatures(up to200℃)and high salinity(saturated salt)***,this work provided new insights into designing and fabricating high-performance drilling fluid treatment agents,demonstrating good potential applications in deep and ultradeep drilling engineering.

关键词： Fluid loss reducer Temperature-and salt-resistance Hydrophobic association Amphoteric Micro-crosslinking

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Automatic velocity picking based on optimal key points tracking algorithm

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Petroleum Science 2024年第2期21卷 903-917页

作者： Yong-Hao Wang Wen-Kai Lu Song-Bai jin Yang Li yu-Xuan Li Xiao-Feng Gu The Institute for Artificial Intelligence(THUAI) Tsinghua UniversityBeijing100084China State Key Laboratory of Intelligent Technology and Systems Tsinghua UniversityBeijing100084China Beijing National Research Center for Information Science and Technology(BNRist) Beijing100084China The Department of Automation Tsinghua UniversityBeijing100084China

Picking velocities from semblances manually is laborious and necessitates experience. Although various methods for automatic velocity picking have been developed, there remains a challenge in efficiently incorporating information from nearby gathers to ensure picked velocity aligns with seismic horizons while also improving picking accuracy. The conventional method of velocity picking from a semblance volume is computationally demanding, highlighting a need for a more efficient strategy. In this study, we introduce a novel method for automatic velocity picking based on multi-object tracking. This dynamic tracking process across different semblance panels can integrate information from nearby gathers effectively while maintaining computational efficiency. First, we employ accelerated density clustering on the velocity spectrum to discern cluster centers without the requirement for prior knowledge regarding the number of clusters. These cluster centers embody the maximum likelihood velocities of the main subsurface structures. Second, our proposed method tracks key points within the semblance volume. Kalman filter is adopted to adjust the tracking process, followed by interpolation on these tracked points to construct the final velocity model. Our synthetic data example demonstrates that our proposed algorithm can effectively rectify the picking errors of the clustering algorithm. We further compare the performances of the clustering method(CM), the proposed tracking method(TM), and the variational method(VM) on a field dataset from the Gulf of Mexico. The results attest that our method offers superior accuracy than CM, achieves comparable accuracy with VM, and benefits from a reduced computational cost.

关键词： Velocity picking Multi-object tracking Density clustering Kalman filter

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Poly(heptazine imide)nanocrystal for hydrogen peroxide evolution in the dark by accumulating photo-generated electrons

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Nano Research 2024年第9期17卷 8036-8044页

作者： Song Kou Shu Lian Xiaodong Xie Wei Ren yu jin Jiahui Bao Honghui Ou Guidong Yang XJTU-Oxford International Joint Laboratory for Catalysis School of Chemical Engineering and TechnologyXi’an Jiaotong UniversityXi’an 710049China Fujian-Taiwan-Hongkong-Macao Science and Technology Cooperation Base of Intelligent Pharmaceutics Institute of OceanographyCollege of Materials and Chemical EngineeringMinjiang UniversityFuzhou 350108China School of Food and Bioengineering Fujian Polytechnic Normal UniversityFuqing 350300China

Organic conjugated polymers have received extensive attention due to their unique electronic ***,there have been relatively few reports on the dark photocatalytic reactions utilizing organic conjugated ***,we report the successful synthesis of an organic conjugated polymer based on poly(heptazine imide)nanocrystals(CNNCs)for H_(2)O_(2)evolution and biomedical applications using a simple salt molten method and sonication-centrifugation *** results show that these colloid CNNCs have the characteristics of photogenerated electrons accumulation and realize dark photocatalysis with high reducibility under visible light ***,these accumulating photogenerated electrons can reduce O_(2)in darkness to produce H_(2)O_(2).In addition,cytotoxicity tests were conducted and it was found that H_(2)O_(2)produced under dark conditions could oxidize L-arginine(L-Arg)to NO,which effectively killed tumors in the *** work provides an important strategy to construct organic conjugated semiconductor nanocrystals and applying them to future energy and biomedical fields.

关键词： poly(heptazine imide) photocatalysis photogenerated electrons hydrogen peroxide evolution cancer treatment

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Anchoring Ru clusters to highly defective N-doped carbon nanotubes via a thermal-shock strategy for stable industrial hydrogen evolution

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Nano Research 2024年第6期17卷 5261-5269页

作者： Zhiming Li Xinyu Li Haiqing Ma Chenliang Ye Hongan yu Long Nie Meng Zheng jin Wang College of Materials Science and Engineering Shenzhen UniversityShenzhen 518060China School of Chemistry and Materials Science Anhui Normal UniversityWuhu 241002China Department of Power Engineering North China Electric Power UniversityBaoding 071003China

Non-Pt or low-Pt catalysts capable for stable generation of hydrogen via water electrolysis at an industrial level of current density are highly *** of strong metal-support connection is beneficial to improve the performance stability of *** we employed highly defective N-doped carbon nanotubes(d-N-CNT)as the support to achieve uniform and firm anchoring of Ru clusters(~1.9 nm)via a thermal-shock *** as-prepared Ru/d-N-CNT catalyst shows excellent catalytic activity for hydrogen evolution reaction(HER)in alkaline media and requires an overpotential(ƞ)of 12 mV at 10 mA·cm^(−2)and 116 mV at 200 mA·cm^(−2)with a Ru loading of 0.025 mg·cm^(−2).Impressively,Ru/d-N-CNT presents robust stability for HER at both low current density(stable for at least 1000 h at 10 mA·cm^(−2))and the industrial level of current density(stable for at least 100 h at 1000 mA·cm^(−2)),remarkably outperforming commercial Pt/C and Ru/*** highly defective nature of the N-CNT support endowed the as-prepared Ru/d-N-CNT catalyst with strong metal-support adhesion that efficiently suppressed agglomeration as well as obscission of Ru ***,the rich defects increased the surface energy of the N-CNT support and resulted in improved hydrophilicity as evidenced by the liquid contact angle measurement and the bubble evolution process,which also played an important role in stabilizing the HER performance especially at large current density.

关键词： thermal-shock method hydrogen evolution reaction large-current-density Ru cluster

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A bifunctional nitrile additive for high-performance lithiumoxygen batteries

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Nano Research 2024年第7期17卷 6119-6126页

作者： Ziwei Li yue yu Dongyue Yang jin Wang Junmin Yan Gang Huang Tong Liu Xinbo Zhang Key Laboratory of Automobile Materials Ministry of EducationDepartment of Materials Science and EngineeringJilin UniversityChangchun 130022China State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China Department of Chemistry and Waterloo Institute for Nanotechnology University of Waterloo200 University Ave.W.WaterlooOntario N2L 3G1Canada School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026China

Li-O_(2)batteries with high energy density hold significant promise as next-generation energy storage ***,Li-O_(2)batteries have poor cycling performance at high current densities and large capacities,primarily due to the high impedance caused by the instability of the lithium anode and the sluggish kinetics in the discharge products decomposition on the ***,we investigated a bifunctional nitrile additive(2-methoxy benzonitrile(2-MBN))with good chemical/electrochemical stability to improve the performances of Li-O_(2)*** 2-MBN could actively modify the anode by ensuring uniform Li+deposition and optimizing the composition of solid electrolyte interphase(SEI).Meanwhile,it could also facilitate the decomposition of discharge products by inducing the formation of sheet-like Li_(2)O_(2),significantly reducing the battery charge *** bifunctional effects of 2-MBN for the anode and cathode enable Li-O_(2)batteries to achieve a stable lifetime of 97 cycles at a current density of 600 mA·g^(−1)with a fixed capacity of 2000 mAh·g^(−1),much better than that of Li-O_(2)batteries without 2-MBN(28 cycles).The inclusion of 2-MBN provides an effective approach for attaining high-performance Li-O_(2)batteries.

关键词： nitrile additives Li-O_(2)batteries lithium metal anode charge overpotential

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Applications of gastric peroral endoscopic myotomy in the treatment of upper gastrointestinal tract disease

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World Journal of Gastrointestinal Surgery 2024年第3期16卷 658-669页

作者： Shi-yu Chang Guo-Hua jin Hai-Bo Sun Dong Yang Tong-yu Tang Department of Gastroenterology The First Hospital of Jilin UniversityChangchun 130021Jilin ProvinceChina

Gastric peroral endoscopic myotomy(G-POME)is an emerging minimally invasive endoscopic technique involving the establishment of a submucosal tun-nel around the pyloric *** 2013,Khashab et al used G-POME for the first time in the treatment of gastroparesis with enhanced therapeutic efficacy,prov-iding a new direction for the treatment of *** the recent and rapid development of G-POME therapy technology,progress has been made in the treatment of gastroparesis and other upper digestive tract diseases,such as congenital hypertrophic pyloric stenosis and gastric sleeve stricture,with *** article reviews the research progress and future prospects of G-POME for the treatment of upper digestive tract gastrointestinal diseases.

关键词： Gastric peroral endoscopic myotomy Upper digestive tract diseases Gastroparesis Congenital hypertrophic pyloric stenosis Gastric sleeve stricture

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Combined effect of cortical superficial siderosis and cerebral microbleed on short-term and long-term outcomes after intracerebral haemorrhage

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Stroke & Vascular Neurology 2024年第4期9卷 429-438,I0131-I0146页

作者： yujia jin yu-hui Huang yu-ping Chen Yao-dan Zhang Jiawen Li Kai-cheng Yang Xianghua Ye Lu-hang jin Jian Wu Chang-zheng yuan Feng Gao Lu-sha Tong Neurology Department The Second Affiliated Hospital of Zhejiang UniversitySchool of MedicineHangzhouChina School of Public Health Zhejiang UniversityHangzhouChina Department of Neurology Tiantai People's Hospital of Zhejiang ProvinceTaizhouChina

Background and purpose Cortical superficial siderosis(cSS)and cerebral microbleed(CMB)have distinct effects on intracerebral haemorrhage(ICH).We aim to investigate the combined effect of cSS and CMB on outcomes after *** Based on a single-centre stroke registry database,patients with spontaneous ICH who had CT scan within 48 hours after ictus and MRI subsequently were *** patients were divided into four groups(cSS-CMB−,cSS-CMB+,cSS+CMB−,cSS+CMB+)according to cSS and CMB on susceptibility-weighted image of *** outcomes were haematoma volume on admission and unfavourable outcome defined as modified Rankin Scale scores≥3 at 3 *** outcomes were all-cause death,recurrence of stroke and ICH during follow-up(median follow-up 2.0 years,IQR 1.0-3.0 years).Results A total of 673 patients were identified from 1044 patients with spontaneous ICH.131(19.5%)had cSS and 468(69.5%)had *** with cSS+CMB+had the highest rate of poor outcome at 3 months,as well as all-cause death,recurrent stroke and ICH during *** cSS−patients,CMB was associated with smaller haematoma(β−0.13;95%CI−0.22 to−0.03;p=0.009),but it still increased risks of recurrent ICH(OR 4.6;95%CI 1.3 to 15.6;p=0.015)and stroke(OR 2.0;95%CI 1.0 to 4.0;p=0.049).These effects of CMB became unremarkable in the context of cSS+.Conclusions Patients with different combinations of cSS and CMB have distinct patterns of short-term and long-term *** CMB is related to restrained haematoma,it does not improve long-term outcomes.

关键词： superficial cerebral effect

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Radiation construction and excellent performances of Ag NPs/TiO_(2)/PEG/PVP multifunctional aerogel:Adsorption-photocatalytic degradation,photosensitive antibacterial and cytotoxicity

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Journal of Materiomics 2024年第3期10卷 585-593页

作者： jin-yu Yang Dong-Liang Liu yue-Sheng Li Xiao-Jie Yang Yi Liu School of Nuclear Technology and Chemistry&Biology/Hubei Key Laboratory of Radiation Chemistry and Functional Materials Hubei University of Science and TechnologyXianning437100HubeiChina Key Laboratory of Coal Conversion and New Carbon Materials of Hubei Province School of Chemistry and Chemical EngineeringWuhan University of Science and TechnologyWuhan437100HubeiChina College of Chemistry and Chemical Engineering Tiangong UniversityTianjin300387China

A cutting-edge method known as photocatalytic antibacterial technology can effectively eliminate drug-resistant bacterial strains and boast a wide-ranging antimicrobial *** the study,a novel Ag NPs/TiO_(2)/PEG/PVP(ATPP)aerogel photocatalyst was synthesized by an electron beam in-situ radiation method using polyethylene glycol(PEG),polyvinylpyrrolidone(PVP),AgNO_(3),and TiO_(2)as raw *** was characterized by X-ray diffraction spectroscopy(XRD),X-ray photoelectron spectroscopy(XPS)and solid ultraviolet diffuse reflectance spectroscopy(UV-Vis DRS).The results demonstrated that silver ions were reduced to silver nanoparticles by electron beam radiation *** the same time,the doping of silver nanoparticles(Ag NPs)enhanced visible-light *** degradation rate of methylene blue(MB)on 5%(in mass)ATPP could reach 81%under visible light for 180 *** coli(***)and Staphylococcus aureus(***)were used as model bacteria to explore the antimi-crobial properties of ATPP by zone of the inhibition method,plate counting method and live/dead bacterial *** antibacterial experiments showed that the antibacterial effect of ATPP was ***,MTT assay and Hoechst33342/PI double staining were used to prove that the composite had good *** aerogel photocatalytic material has the potential to decrease microbial presence in both medical and environmental settings,making it a valuable tool for such applications.

关键词： Ag NPs/TiO_(2)/PEG/PVP aerogel Electron beam radiation Adsorption-photocatalytic Photosensitive antibacterial Cytotoxicity

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Reconstruction algorithm for cross-waveband optical computing imaging

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Chinese Physics B 2024年第10期33卷 233-239页

作者： jin-Tao Xie Shu-Hang Bie Ming-Fei Li yuan-jin yu Yi-Fei Li jin-Guang Wang Bao-Gang Quan Ling-An Wu Institute of Physics Chinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China School of Automation Beijing Institute of TechnologyBeijing 100081China

In a single-pixel fast imaging setup,the data collected by the single-pixel detector needs to be processed by a computer,but the speed of the latter will affect the image reconstruction *** we propose two kinds of setups which are able to transform non-visible into visible light imaging,wherein their computing process is replaced by a camera integration *** image captured by the camera has a low contrast,so here we present an algorithm that can realize a high quality image in near-infrared to visible cross-waveband *** scheme is verified both by simulation and in actual *** setups demonstrate the great potential for single-pixel imaging and high-speed cross-waveband imaging for future practical applications.

关键词： optical computing imaging single-pixel imaging

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Idiopathic mesenteric phlebosclerosis missed by a radiologist at initial diagnosis: A case report

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World Journal of Clinical Cases 2024年第10期12卷 1810-1816页

作者： Min Wang yu-Xia Wan jin-Wen Liao Fei Xiong Department of Gastroenterology Changning County People’s HospitalYibin 644300Sichuan ProvinceChina Department of Gastroenterology Qianwei People’s HospitalLeshan 614400Sichuan ProvinceChina Department of Gastroenterology The People’s Hospital of Jianyang CityChengdu 641400Sichuan ProvinceChina Department of Gastroenterology Sichuan Provincial People’s HospitalUniversity of Electronic Science and Technology of ChinaChengdu 610000Sichuan ProvinceChina

BACKGROUND Idiopathic mesenteric phlebosclerosis(IMP)is a rare type of ischemic colitis characterized by thickening of the wall of the right hemicolon and calcification,sclerosis,and fibrosis of mesenteric *** diagnosis of IMP is based on typical clinical features and imaging *** report a case of IMP that was initially missed by the *** SUMMARY A 77-year-old woman was admitted to the hospital due to chronic diarrhea for over 2 *** had been consuming Chinese patent medicines(CPM)containing fructus gardeniae for more than 15 *** revealed an edematous mucosa,bluish-purple discoloration,erosions,and ulcerations throughout the colorectal *** computed tomography(CT)showed diffuse mural thickening of the entire colorectum,with tortuous thread-like calcifications in the right hemicolon,left hemicolon,and *** of the calcifications were located in the mesenteric *** diagnosis of IMP was established based on medical history,colonoscopy,CT findings,and histopathological *** patient was treated conservatively with papaverine and rifaximin,and CPM was *** diarrhea symptoms improved,indicating the effectiveness of the *** the next several years,she took opium alkaloids for an extended period and did not require hospitalization for the aforementioned gastrointestinal *** IMP is a rare gastrointestinal disease affecting Asian populations,possibly related to long-term herbal medicine *** imaging analysis is crucial for diagnosis,but insufficient understanding of the disease can lead to misdiagnosis or missed *** strategies should be personalized.

关键词： Idiopathic mesenteric phlebosclerosis Computed tomography Colonoscopy Chinese patent medicines Fructus gardeniae Case report

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