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An evaluation of deep thin coal seams and water-bearing/resisting layers in the quaternary system using seismic inversion

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Mining Science and Technology 2009年第2期19卷 161-165页

作者： XU Yong-zhong HUANG Wei-chuan CHEN Tong-jun CUI ruo-fei CHEN Shi-zhong School of Resource and Geosciences China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China Institute of Geophysics China Earthquake Administration Beijing 100081 China

Non-liner wave equation inversion,wavelet analysis and artificial neural networks were used to obtain stratum parameters and the distribution of thin coal *** lithology of the water-bearing/resisting layer in the Quaternary system was also *** implementation process included calculating the well log parameters,stratum contrasting the seismic data and the well logs,and extracting,studying and predicting seismic *** inversion parameters,including the layer velocity and wave impedance,were calculated and effectively used for prediction and *** knowledge and seismic interpretation were used to remedy a dearth of seismic data during the inversion *** enhanced the stability of the inversion ***-linear seismic inversion and artificial neural networks were used to interpret coal seismic lithology and to study the water-bearing/resisting layer in the Quaternary *** of the 1～2 m thin coal seams,and also of the water-bearing/resisting layer in the Quaternary system,is *** upper mining limit can be lifted from 60 m to 45 *** predictions show that this method can provide reliable data useful for thin coal seam exploitation and for lifting the upper mining limit,which is one of the principles of green mining.

关键词： seismic inversion artificial neural network wavelet analysis upper mining limit thin seam

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青岛胶州湾隧道工程施工地质条件研究

铁道工程学报 2014年第12期31卷 13-17,36页

作者：马若飞中铁第一勘察设计院集团有限公司西安710043

研究目的:针对青岛胶州湾海底隧道跨度大,施工难度大,洞身地质条件复杂,施工影响因素不确定,风险亦大的特点,研究、分析洞身断层、涌水、围岩分级变更等对施工的影响,为保障施工安全提供科学依据。研究结论:(1)胶州湾海底隧道洞身构造... 详细信息

研究目的:针对青岛胶州湾海底隧道跨度大,施工难度大,洞身地质条件复杂,施工影响因素不确定,风险亦大的特点,研究、分析洞身断层、涌水、围岩分级变更等对施工的影响,为保障施工安全提供科学依据。研究结论:(1)胶州湾海底隧道洞身构造和裂隙水分布,受不确定因素的影响存在差异;(2)研究、分析了洞身断层的具体位置和特征,找出了存在差异的原因:将断层所用的方位角误以为是走向方位角,造成了走向、倾向背离区域构造的异常现象;(3)通过对围岩变更数据的研究,绘制出围岩分级变更比例示意图,直观反映了施工前后围岩等级划分的变化:原Ⅲ级围岩所占的比例由53%变更调整为29%、Ⅳ级围岩的比例由28%变更调整为58%、Ⅴ级围岩的比例由10%变更调整为4%;(4)该研究成果可应用于隧道施工期间开展工程地质工作,实施动态设计,保障工程的质量、工期、安全和控制投资规模。

关键词：海底隧道地质条件研究

Sequential Ir-Catalyzed Allylation/2-aza-Cope Rearrangement Strategy for the Construction of Chiral Homoallylic Amines

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Chinese Journal of Chemistry 2020年第8期38卷 807-811页

作者： ruo-Qing Wang Chong Shen Xiang Cheng Zuo-fei Wang Hai-Yan Tao Xiu-Qin Dong Chun-Jiang Wang Engineering Research Center of Organosilicon Compounds&Materials Ministry of EducationCollege of Chemistry and Molecular SciencesWuhan UniversityWuhanHubei 430072China State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 230021China

Sequential Ir-catalyzed asymmetric allylation/2-aza-Cope rearrangement of arylidene aminomalonates with allylic carbonates was successfully developed,and a variety of enantioenriched homoallylic amine derivatives were obtained in high yields with good chirality transfer and excellent E/Z-geometry control(up to 99%yield,96%ee).Compared with previous dual catalytic system established for this transformation,the current mono metal catalytic system provides a simpler and more practical protocol employing the readily available starting materials.

关键词： materials system starting

The Demand Investigation and Suggestions of the Supply System of Preschool Education in Western Areas of China

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International English Education Research 2015年第11期 73-75页

作者： ruo fei LUO College of public administration of Southwest Jiao Tong University Chengdu SiChuan 610031

Nowadays, preschool education has become the weak part of eduction. Thus, the supply system of preschool education has been heatedly discussed *** thesis makes some suggestions for the supply system innovation of pres... 详细信息

关键词： Society construction Western areas Preschool education the Supply system Demand investigation.

Clinical characteristics and beta-cell function of Chinese children and adolescents with type 2 diabetes from 2009 to 2018

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World Journal of Pediatrics 2019年第4期15卷 405-411页

作者： Zhen-Ran Xu Miao-Ying Zhang Jin-Wen Ni ruo-Qian Cheng Zhang-Qian Zheng Li Xi fei-Hong Luo Department of Pediatric Endocrinology and Inherited Metabolic Diseases Children's Hospital of Fudan University399 Wan Yuan RoadShanghai 201102China

Background The limited available studies have unveiled different natural histories and prognosis associated with pediatric type 2 diabetes (T2D) and adult *** date,data on the clinical features,metabolic profiles and beta-cell function characteristics are still limited in the Chinese pediatric T2D *** A total of 56 children with T2D,31 with prediabetes and 159 with obesity were *** characteristics,metabolic profiles,beta-cell function and insulin resistance were *** The mean onset age of T2D was 12.35 ± 1.99 (7.9-17.8) years,and 7% of children were younger than 10 years;55% of them were male,57% had a family history of diabetes and 64% had classic symptoms,and 25% had a low or high birth weight.89% of T2D patients were obese or overweight.A total of 58% of the patients with prediabetes were *** fast serum C-peptide level was highest in the obesity group (P < 0.001),and there was no significant difference between the T2D and prediabetes *** mean homeostatic model of assessment of beta-cell function was the highest in the obesity group and was lowest in the T2D group (P < 0.00 1).The T2D group had the most serious lipid metabolism disorder,with the highest levels of total triglycerides,total cholesterol,and low density lipoprotein and the lowest high density lipoprotein level among the three *** A younger onset age and greater male susceptibility were found in Chinese pediatric T2D patients,and there was a stepwise deterioration trend in beta-cell function among patients with obesity,prediabetes and *** on our results,together with the SEARCH study results,an early screening and intervention program for T2D is recommended in high-risk or obese Chinese pediatric populations starting at 7 years.

关键词： Diabetes mellitus,type 2 Obesity Prediabetic state

FDGLib: A Communication Library for Efficient Large-Scale Graph Processing in FPGA-Accelerated Data Centers

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Journal of Computer Science & Technology 2021年第5期36卷 1051-1070页

作者： Yu-Wei Wu Qing-Gang Wang Long Zheng Xiao-fei Liao Hai Jin Wen-Bin Jiang Ran Zheng kan Hu National Engineering Research Center for Big Data Technology and System School of Computer Science and Technology Huazhong University of Science and TechnologyWuhan 430074China Services Computing Technology and System Laboratory School of Computer Science and Technology Huazhong University of Science and TechnologyWuhan 430074China Cluster and Grid Computing Laboratory School of Computer Science and TechnologyHuazhong University of Science and TechnologyWuhan 430074China

With the rapid growth of real-world graphs,the size of which can easily exceed the on-chip(board)storage capacity of an accelerator,processing large-scale graphs on a single Field Programmable Gate Array(FPGA)becomes *** multi-FPGA acceleration is of great necessity and *** cloud providers(e.g.,Amazon,Microsoft,and Baidu)now expose FPGAs to users in their data centers,providing opportunities to accelerate large-scale graph *** this paper,we present a communication library,called FDGLib,which can easily scale out any existing single FPGA-based graph accelerator to a distributed version in a data center,with minimal hardware engineering *** provides six APIs that can be easily used and integrated into any FPGA-based graph accelerator with only a few lines of code *** the torus-based FPGA interconnection in data centers,FDGLib also improves communication efficiency using simple yet effective torus-friendly graph partition and placement *** interface FDGLib into AccuGraph,a state-of-the-art graph *** results on a 32-node Microsoft Catapult-like data center show that the distributed AccuGraph can be 2.32x and 4.77x faster than a state-of-the-art distributed FPGA-based graph accelerator ForeGraph and a distributed CPU-based graph system Gemini,with better scalability.

关键词： data center accelerator graph processing distributed architecture communication optimization

Reflectivity forward modeling and a CSSI method seismic inversion study of igneous intrusive area,coked area,and gas-enriched area located within a coal seam

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Mining Science and Technology 2009年第4期19卷 457-462页

作者： XU Yong-zhong CUI ruo-fei HUANG Wei-chuan CHEN Tong-jun CHEN Shi-zhong DONG Shou-hua School of Resource and Geosciences China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China Institute of Geophysics China Earthquake Administration Beijing 100081 China

We applied the reflectivity method and the constrained sparse spike inverse modeling(CSSI) method to the interpretation of coal field lithologic seismic *** introducing the principles of these two methods we discuss some parameters of a geological model involving possible gas enriched areas or intruded igneous *** geological model was constructed and a 60 Hz seismic response profile was obtained looking for igneous rock intrusion and coked areas of the coal seam using the reflectivity *** from synthesized logging data from two wells and a synthesized seismic wavelet we calibrated the model to show accurate ***,we predicted the lithology within a 10 m igneous rock area,a 3 m coal seam area,and a coked area using the CSSI *** results show that the CSSI technique can identify hard to recognize lithologic features that normal profil-ing methods might *** can quantitatively analyze and evaluate the intrusive area,the coked area,and the gas-enriched area.

关键词： CSSI reflectivity method igneous rock coal seam coked area gas-enriched area

Outcomes of seromuscular bladder augmentation compared with standard bladder augmentation in the treatment of children with neurogenic bladder

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World Journal of Clinical Cases 2022年第23期10卷 8115-8123页

作者： Xiao-Gang Sun Yan-Xia Li Long-fei Ji Jia-Long Xu Wei-Xiu Chen ruo-Yi Wang Department of Pediatric Surgery The Second HospitalCheeloo College of MedicineShandong UniversityJinan 250033Shandong ProvinceChina Department of Neurology Shandong Second Provincial General HospitalShandong Provincial ENT HospitalJinan 250011Shandong ProvinceChina Department of Pediatric Surgery Dongying District People’s HospitalDongying 257000Shandong ProvinceChina

BACKGROUND Intestinal seromuscular bladder augmentation(SMBA)surgery has produced no mucosal-related complications,but its outcomes need to be *** To evaluate the safety and effectiveness of SMBA in the treatment of children with neurogenic *** A retrospective analysis of the clinical data of children with SMBA was performed from March 2008 to February 2018,and the data were compared with those of children receiving standard cystoplasty(SC).RESULTS In a cohort of 67 children who underwent bladder augmentation,the 46 children in the SC group had an average age of 10.6 years and a follow-up time of 36 mo,and the 21 children in the SMBA group had an average age of 7.6 years and a follow-up time of 29.7 *** preoperative and postoperative bladder volumes in the SMBA group were 151.7 mL and 200.4 mL,respectively,and those in the SC group were 173.9 mL and 387.0 mL,*** significant difference in preoperative urinary dynamic parameters was found between the two groups,but the difference after operation was statistically *** main complications after SMBA were residual ureteral reflux and failed bladder augmentation,with incidences of 33.3%and 28.6%,*** all 6 patients with failed augmentation in the SMBA group,ileum seromuscular patches were used for augmentation,and SC was chosen for *** reoperation,patch contracture and fibrosis were *** The improvement of urinary dynamic parameters in the SMBA group was significantly lower than that in the SC *** with SMBA had a higher probability of patch contracture and reaugmentation,which might be related to impaired blood supply and urine stimulation,and the sigmoid colon patch should be the priority.

关键词： Neurogenic bladder Seromuscular bladder augmentation Bladder Surgery Urinary dynamic parameter

High mass-loading and binder-free flexible vanadium-based oxide cathode for zinc-ion battery via a bridge of MXene

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Journal of Materials Science & Technology 2023年第12期143卷 84-92页

作者： kan Fang fei Li Gui-Gen Wang Yi-Lin Liu Man-Lin Tan Da-Qiang Zhao Hua-Yu Zhang Jie-Cai Han Shenzhen Key Laboratory for Advanced Materials School of Materials Science and EngineeringHarbin Institute of TechnologyShenzhen 518055China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin 150080China Research Institute of Tsinghua University in Shenzhen Shenzhen 518055China

Flexible zinc-ion batteries(ZIBs)are promising power sources for portable devices due to their high safety and low production ***,the low mass-loading and limited areal capacity of cathode materials are the major problems blocking the practicability of ***,a high mass-loading and binder-free flexible vanadium oxide(MCV@CC)cathode with a large areal capacity was fabricated via the bridge effect of *** functional MXene bridge induces the growth of the vanadium oxide active layer on the carbon cloth(CC)flexible *** binder-free cathode can reduce the electrochemically inactive weight of the whole electrode,which enhances the energy density of ***,the MCV@CC cathode(mass-loading of∼7 mg cm^(−2))delivers a desirable areal capacity(2.36 mAh cm^(−2))and good cycling stability(capacity retention of 86.1%after 1200 cycles at 10 mA cm^(−2)).Moreover,several ex-situ characterization results indicate that the reaction mechanism upon battery cycling is based on the reversible Zn^(2+)/H^(+)(de)intercalation in the vanadium oxide ***,the assembled quasi-solid-state MCV@CC//Zn flexible battery exhibits decent performance at different bending *** a bridge effect strategy sheds light on the construction of high mass-loading flexible electrodes for ZIBs applications.

关键词： Zinc-ion batteries Vanadium oxide MXene bridge High mass-loading Flexible electrode