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High-performance computing of 3D blasting wave propagation in underground rock cavern by using 4D-LSM on TianHe-3 prototype E class supercomputer

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Deep Underground Science and Engineering 2022年第1期1卷 87-100页

作者： meng fu Gaofeng Zhao State Key Laboratory of Hydraulic Engineering Simulation and Safety School of Civil EngineeringTianjin UniversityTianjinChina

Parallel computing assigns the computing model to different processors on different devices and implements it simultaneously.Accordingly,it has broad applications in the numerical simulation of geotechnical engineering and underground engineering,of which models are always large-scale.With parallel computing,the computing time or the memory requirements will be reduced by splitting the original domain of the numerical model into many subdomains,which is thus named as the domain decomposition method.In this study,a cubic and equal volume domain decomposition strategy was utilized to realize the parallel computing on the distributed memory system of four-dimensional lattice spring model(4D-LSM)based on the message passing interface.With a more efficient communication strategy introduced,this study aimed at operating an one-billion-particle model on a supercomputer platform.The preprocessing procedure of the parallelized 4D-LSM was restructured and the particle generation strategy suitable for the supercomputer platform was employed to minimize the time consumption in preprocessing and calculation.On this basis,numerical calculations were performed on TianHe-3 prototype E class supercomputer at the National Supercomputer Center in Tianjin.Two fieldscale three-dimensional blasting wave propagation models were carried out,of which the numerical results verify the computing power and the advantage of the parallelized 4D-LSM in the simulation of large-scale three-dimension models.Subsequently,the time complexity and spatial complexity of 4D-LSM and other particle discrete element methods were analyzed.

关键词： domain decomposition method lattice spring model parallel computing wave propagation

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Endoscopic treatment of urothelial encrusted pyelo-ureteritis disease:A case series

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World Journal of Clinical Cases 2022年第35期10卷 12980-12989页

作者： Yu-Bao Liu Bo Xiao Wei-Guo Hu Gang Zhang meng fu Jian-Xing Li Department of Urology Beijing Tsinghua Changgung HospitalSchool of Clinical MedicineTsinghua UniversityBeijing 102218China

BACKGROUND Urothelial encrusted pyelo-ureteritis disease is an infrequent condition and there is no unified surgical treatment and reference standard to consult.We have used a minimally invasive endoscopic method to treat three such cases,which yielded excellent results.CASE SUMMARY The first case was a 45-year-old man who had unilateral ureteropelvic junction(UPJ)atresia and contralateral stenosis and was treated by double endoscopic surgery using an anterograde percutaneous nephroscope coupled with a rigid retrograde ureteroscope.The second case was a 12-year-old boy who received a percutaneous nephroscopy on one side and a percutaneous nephroscopy with a rigid ureteroscope on the other side due to the presence of bilateral UPJ stenosis.The third case was a 32-year-old woman with bilateral lower ureteral stricture treated using a rigid retrograde ureteroscope.Endoscopic surgeries were successfully performed on all the three patients.Varying degrees of encrustation and erosion of the urothelium were observed during the operation.The calcified layer composition analysis showed magnesium ammonium phosphate or carbonate apatite.Two patients achieved a good prognosis.CONCLUSION Minimally invasive endoscopic treatment for urothelial encrusted pyelo-ureteritis disease can yield better results.

关键词： Urothelial encrusted pyelo-ureteritis disease Percutaneous nephroscope Rigid ureteroscope Minimally invasive endoscopy Balloon dilation Case report

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论民族地区治理现代化的数字化赋能

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青海民族研究 2024年第1期35卷 144-152页

作者：赛娜付梦瑶高瑞婷中国科学院大学北京100190

民族地区治理现代化是新时期全面建设中国式现代化的重要内容。鉴于近年来社会治理风险加剧,以及民族地区面临着特殊性和差异性的复杂治理需求,数字化对民族地区治理建设的赋能已成为必然趋势。数字化赋能不仅可以推动民族地区构建高效... 详细信息

民族地区治理现代化是新时期全面建设中国式现代化的重要内容。鉴于近年来社会治理风险加剧,以及民族地区面临着特殊性和差异性的复杂治理需求,数字化对民族地区治理建设的赋能已成为必然趋势。数字化赋能不仅可以推动民族地区构建高效协同的社会治理共同体和网络化治理体系,还能加强民族地区治理决策的科学性和精准性,从而提升民族地区的治理能力与治理水平。当前,民族地区在数字化赋能治理建设实践中面临治理观念、治理制度、治理资源等方面的困难与挑战。在新时期的治理建设工作中,民族地区须借鉴先进经验,针对问题精准施策,继续推动数字化赋能,从而加速推进民族地区治理现代化。

关键词：民族地区治理治理现代化数字化赋能社会治理共同体

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Facile fabrication of CeF_(3)/g-C_(3)N_(4) heterojunction photocatalysts with upconversion properties for enhanced photocatalytic desulfurization performance

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Journal of Rare Earths 2021年第10期39卷 1204-1210,I0002页

作者： Xiaowang Lu Feng Chen Junchao Qian meng fu Qiong Jiang Qinfang Zhang School of Material Science and Engineering Yancheng Institute of TechnologyYancheng 224051China School of Material Science and Engineering Changzhou UniversityChangzhou 213164China Jiangsu Key Laboratory of Materials Surface Science and Technology Changzhou UniversityChangzho 213164China School of Chemistry and Bioengineering Suzhou University of Science and TechnologySuzhou 215009China

Cerium fluoride(CeF_(3))semiconductor with upconversion property was constructed on graphite carbonitride(g-C_(3) N_(4))nanosheets by microwave hydrothermal method.The X-ray diffraction,transmission election microscopy,Fourier transform infrared,and X-ray photoelectron spectra techniques were used to characterize the CeF_(3)/g-C_(3)N_(4) nanocomposite.The study shows that CeF_(3) has upconversion property and can convert visible light(Vis)and near-infrared light(NIR)into ultraviolet light(UV).Mo reover,CeF3 and g-C_(3) N_(4) can form well-defined heterojunction and promote the effective separation of photogenerated electrons and holes.The synergistic effect of the CeF_(3)/g-C_(3)N_(4) nanocomposite was evaluated by photocatalytic degradation of dibenzothiophene(DBT).The optimum photocatalyst of CeF_(3)/g-C_(3)N_(4)(40 wt%)composites exhibit the highest photocatalytic desulfurization rate of the model oil under visible light radiation.

关键词： CeF_(3) g-C_(3)N_(4) Upconversion Heterojunction Photocatalytic desulfurization Rare earths

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Needle-perc: a new instrument and its initial clinical application

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Chinese Medical Journal 2020年第6期133卷 732-734页

作者： Bo Xiao Chao-Yue Ji Bo-Xing Su Wei-Guo Hu meng fu Jian-Xing Li Department of Urology Beijing Tsinghua Changgung HospitalTsinghua UniversityBeijing 102218China

Percutaneous nephrolithotomy(PCNL)has achieved remarkable acceptance during the past decade.The minimization of the instruments used and flexible scope improvements helped lead to its popularity.A previous literature proved that the tract size was positively correlated with the rate of bleeding and renal injuries.11 On the basis of this conception,we devised a new PCNL technique,called"needle-perc"as the needle was even thinner than the micro-perc technique.In this study,we present our initial experience of using the needle-perc method to deal with small renal stones and to assess its feasibility and safety as new instrumentation in the field of minimally invasive endourology.

关键词： needle instrument injuries

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Small interfering RNA targeting of keratin 17 reduces inflammation in imiquimod-induced psoriasis-like dermatitis

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Chinese Medical Journal 2020年第24期133卷 2910-2918页

作者： Chun-Ying Xiao Zhen-Lai Zhu Chen Zhang meng fu Hong-Jiang Qiao Gang Wang Er-Le Dang Department of Dermatology Xijing HospitalFourth Military Medical UniversityXi’anShaanxi 710032China

Background:Psoriasis is a common chronic inflammatory skin disease with 2%to 3%prevalence worldwide and a heavy social-psychological burden for patients and their families.As the exact pathogenesis of psoriasis is still unknown,the current treatment is far from satisfactory.Thus,there is an urgent need to find a more effective therapy for this disease.Keratin 17(K17),a type I intermediate filament,is overexpressed in the psoriatic epidermis and plays a critical pathogenic role by stimulating T cells in psoriasis.Therefore,we hypothesized that inhibiting K17 may be a potential therapeutic approach for psoriasis.This study aimed to investigate the therapeutic effect of K17-specific small interfering RNA(siRNA)on mice with imiquimod(IMQ)-induced psoriasis-like dermatitis.Methods:Eight-week-old female BALB/c mice were administered a 5%IMQ cream on both ears to produce psoriatic dermatitis.On day 3,K17 siRNA was mixed with an emulsion matrix and applied topically to the left ears of the mice after IMQ application every day for 7 days.The right ears of the mice were treated in parallel with negative control(NC)siRNA.Inflammation was evaluated by gross ear thickness,histopathology,the infiltration of inflammatory cells(CD3+T cells and neutrophils)using immunofluorescence,and the expression of cytokine production using real-time quantitative polymerase chain reaction.The obtained data were statistically evaluated by unpaired t-tests and a one-way analysis of variance.Results:The severity of IMQ-induced dermatitis on K17 siRNA-treated mice ears was significantly lower than that on NC siRNA-treated mice ears,as evidenced by the alleviated ear inflammation phenotype,including decreased ear thickness,infiltration of inflammatory cells(CD3+T cells and neutrophils),and inflammatory cytokine/chemokine expression levels(interleukin 17[IL-17],IL-22,IL-23,C-X-C motif chemokine ligand 1,and C-C motif chemokine ligand 20)(P<0.05 vs.the Blank or NC siRNA groups).Compared to the NC siRNA treatment,the K17 siRNA treatment resulted in i

关键词： Psoriasis Keratin 17 Small interfering RNA Imiquimod Inflammation

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EG/CPDA复合材料的制备及其对苯气体的吸附

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辽宁化工 2024年第5期53卷 686-690页

作者：朱吉付猛常州大学石油化工学院江苏常州213164 常州大学材料科学与工程学院江苏常州213164

以多巴胺盐酸盐为碳源,采用原位浸渍活化工艺制备膨胀石墨/碳化聚多巴胺(EG/CPDA)复合材料,使用扫描电子显微镜、氮气吸脱附仪、傅里叶变换红外光谱仪等设备对EG/CPDA复合材料进行表征,考查CPDA微孔吸附结构的形成机理,研究醇水比、氨... 详细信息

以多巴胺盐酸盐为碳源,采用原位浸渍活化工艺制备膨胀石墨/碳化聚多巴胺(EG/CPDA)复合材料,使用扫描电子显微镜、氮气吸脱附仪、傅里叶变换红外光谱仪等设备对EG/CPDA复合材料进行表征,考查CPDA微孔吸附结构的形成机理,研究醇水比、氨水浓度、KOH比例和碳化活化顺序对复合材料微观结构及对苯气体吸附性能的影响。结果表明:EG/CPDA复合材料,保留了碳化PDA的虚体孔道,架构出具有通透性微米级大孔和丰富的纳米级小孔的分级多孔碳材料;当醇水比为1∶2,氨水量0.4 g,800℃预碳化2 h,与KOH按1∶4混合,700℃活化1 h时,其比表面积和总孔容可达到1291 m^(2)/g和1.28 cm^(3)/g,对苯气体的吸附量可达1303 mg/g,并且表面富含的sp^(2) C/N有望提高苯气体对水蒸气的竞争性吸附能力。

关键词：聚多巴胺膨胀石墨苯气体吸附性能

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组合水生态修复技术在环湖农业面源污染治理中的应用

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能源研究与管理 2024年第2期16卷 37-42页

作者：付猛胡振芳中国电建集团江西省电力设计院有限公司南昌330096 南昌市南钢学校南昌330012

减少农业面源污染物对水体的污染,对保障人民生命、生产活动具有重要意义。以余干县门前湖水体治理工程为例,采用面源污染生态拦截、尾水提升、湖区水质提升与水生态修复这种组合式的水生态修复技术进行水体模拟治理。计算结果表明,门... 详细信息

减少农业面源污染物对水体的污染,对保障人民生命、生产活动具有重要意义。以余干县门前湖水体治理工程为例,采用面源污染生态拦截、尾水提升、湖区水质提升与水生态修复这种组合式的水生态修复技术进行水体模拟治理。计算结果表明,门前湖的面源污染大幅下降,各项污染物的年削减量分别为:化学需氧量503.23 t、氨氮27.09 t、总氮49.84 t、总磷4.34 t,水质得到明显提升,构建水生态系统,水体能够实现自净。所提组合式水生态修复技术对农业面源污染的治理具有明显的效用。

关键词：农业面源污染生态拦截尾水提升生态修复

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人工时效对盘螺拉伸性能影响的研究

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南方金属 2024年第1期 43-47页

作者：孙福猛何荣福宝武集团中南钢铁广东中南钢铁股份有限公司广东韶关512123

盘螺矫直后拉伸试验没有明显屈服,需要使用引伸计检测R_(p0.2)代替R_(eL)。但不同检测条件及操作人员对R_(p0.2)检测结果影响较大。文章通过不同温度的人工时效,给出能够稳定检测屈服强度的方法,可在生产工艺调整过程中给出稳定的检测... 详细信息

盘螺矫直后拉伸试验没有明显屈服,需要使用引伸计检测R_(p0.2)代替R_(eL)。但不同检测条件及操作人员对R_(p0.2)检测结果影响较大。文章通过不同温度的人工时效,给出能够稳定检测屈服强度的方法,可在生产工艺调整过程中给出稳定的检测结果。

关键词：盘螺拉伸试验人工时效引伸计

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高速公路工程施工中BIM技术的应用

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智能建筑与智慧城市 2024年第7期 104-106页

作者：傅梦媛江西交通咨询有限公司

BIM技术在高速公路工程施工中应用具有一定的可行性和有效性,有必要推动BIM技术实现更广泛、更深层次的应用效果,为施工技术应用和施工组织管理提供有力支持。文章研究了高速公路施工中BIM技术的应用,经过充分论证后,从施工仿真、质量... 详细信息

BIM技术在高速公路工程施工中应用具有一定的可行性和有效性,有必要推动BIM技术实现更广泛、更深层次的应用效果,为施工技术应用和施工组织管理提供有力支持。文章研究了高速公路施工中BIM技术的应用,经过充分论证后,从施工仿真、质量管理、进度管理等方面出发,分析了BIM技术应用要点,不但要解决应用过程中存在的普遍性问题,而且要细化到路基、路面等主要施工工序上,找到具体解决办法,减少质量隐患,提高施工效率。

关键词：高速公路工程施工 BIM技术技术应用

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