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Fluorinated metal-organic framework for methane purification from a ternary CH_(4)/C_(2)H_(6)/C_(3)H_(8)mixture

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Chinese Journal of Structural Chemistry 2023年第11期42卷 50-54页

作者： Ke-Ai Zhou lian Huang Xing-Ping Fu Li-Ling Zhang Yu-Ling wang Qing-Yan Liu College of Chemistry and Chemical Engineering Jiangxi Normal UniversityNanchang330022PR China Department of Ecological and Resources Engineering Fujian Key Laboratory of Eco-industrial Green TechnologyWuyi UniversityWuyishanFujian354300PR China

Herein we present a fluorinated metal-organic framework of{(Me_(2)NH_(2))[Ni_(3)(μ_(3)-OH)(CF_(3)-BPDC-CF_(3))_(3)(tpt)]}_(n)(1)constructed from 2,2'-bis(trifluoromethyl)biphenyl-4,4'-dicarboxylic(CF_(3)-BPDC-CF_(3)^(2-))and 2,4,6-tri(4-pyridyl)-1,3,5-triazine(tpt)ligands,which is developed for separating propane(C_(3)H_(8))and ethane(C_(2)H_(6))from natural *** 1 preferentially adsorbs C_(3)H_(8)and C_(2)H_(6)over CH_(4)demonstrated by gas adsorption *** presence of trifluoromethyl groups on the biphenyl-4,4'-dicarboxylic ligands facilitates the highly polarized micropore environments for compound 1,thus providing suitable micorpores for capturing the C_(3)H_(8)and C_(2)H_(6)molecules with larger polarizabilities and sizes compared to CH_(4)*** dynamic mixture breakthrough experiments showed that compound 1 can separate C_(3)H_(8)and C_(2)H_(6)from the ternary CH_(4)/C_(2)H_(6)/C_(3)H_(8)mixtures efficiently,endowing compound 1 with excellent methane purification ability.

关键词： Gases separation Propane and ethane adsorption Fluorinated MOF Crystal structure Natural gas purification

The impact of X-rays on the expressions of miR-130a/miR-25 and its potential role in the enhanced metastasis of A549 cell lines in vitro induced by X-rays

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Science China(Technological Sciences) 2013年第9期56卷 2243-2249页

作者： LV Jin wang SiNian SONG XiuJun LI xiao HE Rui YU HuiJie CHEN Shu wang Lei JIANG QiSheng The Second Artillery General Hospital PLA

We aimed to investigate the impact of X-rays on miR-130a and miR-25 expressions of A549 cell lines and to understand the mechanism of miR-130a and miR-25 on the regulation of invasion and metastasis of A549 cell lines. Human adenocarcinoma cells of the line A549 were cultured and radiated by X-rays at the absorbed doses of 2 and 4, respectively by linear accelerator. Transwell invasion and migration assay were employed to exam the metastasis ability of A549 cells post X-rays irradiation. Both the miRNA and mRNA were extracted from A549 cells at different time points post radiation. The expressions of miR-130a and miR-25, as well as the expressions of VEGF and CCR-7 mRNAs, were detected in A549 cells with 2 and 4 Gy X-rays radiation, respectively by real time PCR. Results were statistically analyzed by SAS 8.2 software, which showed that the invasiveness of A549 cells post 2 and 4 Gy X-rays increased significantly compared with that of untreated A549 cells (the migration cell numbers are 20, 48 and 62 in Group 0, 2 and 4 Gy X-rays, respectively). Furthermore, the expressions of miR-130a and miR-25 also increased significantly at the time-points of 1, 2, 4, and 8 h post radiation, and began to decrease to the control level at 12 h post radiation. VEGF and CCR-7 mRNAs were detected to be up-regulated 18 h post radiation and remained at a high level till 72 h post radiation. The expression of VEGF mRNA has a close correlation with that of CCR-7 mRNA, and the expression of miR-130a also has a correlation with that of VEGF and CCR-7mRNAs. It is concluded that the metastasis of A549 cells in vitro could be promoted by X-rays, and miR-130a might play a role in the metastasis of A549 cells via regulating the expressions of VEGF and CCR-7 mRNAs.

关键词： radiation lung cancer microRNA metastasis

A Pipelining Loop Optimization Method for Dataflow Architecture

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Journal of Computer Science & Technology 2018年第1期33卷 116-130页

作者： Xu Tan xiao-Chun Ye xiao-Wei Shen Yuan-Chao Xu Da wang Lunkai Zhang Wen-Ming Li Dong-Rui Fan Zhi-Min Tang State Key Laboratory of Computer Architecture Institute of Computing Technology Chinese Academy of Sciences Beijing 100190 China School of Computer and Control Engineering University of Chinese Academy of Sciences Beijing 1000J9 China State Key Laboratory of Mathematical Engineering and Advanced Computing Wuxi 214125 China College of Information Engineering Capital Normal University Beijing 100048 China Department of Computer Science The University of Chicago Chicago IL 60637 U.S.A.

With the coming of exascale supercomputing era, power efficiency has become the most important obstacle to build an exascale system. Dataflow architecture has native advantage in achieving high power efficiency for scientific applications. However, the state-of-the-art dataflow architectures fail to exploit high parallelism for loop processing. To address this issue, we propose a pipelining loop optimization method （PLO）, which makes iterations in loops flow in the processing element （PE） array of dataflow accelerator. This method consists of two techniques, architecture-assisted hardware iteration and instruction-assisted software iteration. In hardware iteration execution model, an on-chip loop controller is designed to generate loop indexes, reducing the complexity of computing kernel and laying a good f（mndation for pipelining execution. In software iteration execution model, additional loop instructions are presented to solve the iteration dependency problem. Via these two techniques, the average number of instructions ready to execute per cycle is increased to keep floating-point unit busy. Simulation results show that our proposed method outperforms static and dynamic loop execution model in floating-point efficiency by 2.45x and 1.1x on average, respectively, while the hardware cost of these two techniques is acceptable.

关键词： dataflow model control-flow model loop optimization exascale computing scientific application

Endoscopic pancreaticobiliary drainage with overlength stents to prevent delayed perforation after endoscopic papillectomy:A pilot study

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World Journal of Gastroenterology 2020年第44期26卷 7036-7045页

作者： liang Wu Fang Liu Nan Zhang xiao-Peng wang Wen Li International Center for Diagnosis and Treatment of Liver Diseases The Fifth Medical Center of Chinese PLA General HospitalBeijing 100039China Department of Gastroenterology and Hepatology The First Medical Center of Chinese PLA General HospitalBeijing 100853China Department of Gastroenterology and Hepatology Chinese PLA 305 HospitalBeijing 100017China

BACKGROUND Endoscopic papillectomy(EP)is rapidly replacing traditional surgical resection and is a less invasive procedure for the treatment of duodenal papillary tumors in selected *** the expansion of indications,concerns regarding EP include not only technical difficulties,but also the risk of complications,especially delayed duodenal *** perforation after EP is a rare but fatal *** of the artificial ulcer to bile and pancreatic juice is considered to be one of the causes of delayed perforation after *** bile and pancreatic juice away from the wound may help to prevent delayed *** To evaluate the feasibility and safety of placing overlength biliary and pancreatic stents after *** This is a single-center,retrospective *** patients with exposure or injury of the muscularis propria after EP were included.A 7-Fr overlength biliary stent and a 7-Fr overlength pancreatic stent,modified by an endoscopic nasobiliary drainage tube,were placed in the common bile duct and pancreatic duct,respectively,and the bile and pancreatic juice were drained to the proximal *** EP and overlength stents placement were technically feasible in all five patients(63±12 years),with an average operative time of 63.0±5.6 *** the five lesions(median size 20 mm,range 15-35 mm),four achieved en bloc excision and curative *** final histopathological diagnoses of the endoscopic specimen were one tubular adenoma with high-grade dysplasia(HGD),one tubulovillous adenoma with low-grade dysplasia,one hamartomatous polyp with HGD,one poorly differentiated adenocarcinoma and one atypical juvenile polyposis with tubulovillous adenoma,HGD and field cancerization invading the muscularis mucosae and *** were no stent-related complications,but one papillectomy-related complication(mild acute pancreatitis)occurred without any episodes of bleeding,perforation,cholangitis or late-onset duct stenosis.

关键词： Endoscopic papillectomy Major duodenal papilla Delayed perforation Overlength stent Endoscopic retrograde cholangiopancreatography Duodenal papillary tumors

Integration and development of energy and information network in the Pan-Arctic region

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Global Energy Interconnection 2019年第6期2卷 505-513页

作者： xiaoxia Wei Jinyu xiao Zhe wang Zhichun wang Yun Tian Global Energy Interconnection Development and Cooperation Organization Xicheng DistrictBeijing 100031P.R.China College of Information Science&Technology Beijing Normal UniversityHaidian DistrictBeijng 100875P.R.China

The Global Energy Interconnection is an important strategic approach used to achieve efficient worldwide energy *** idea of developing integrated power,information,and transportation networks provides increased power interconnection functionality and meaning,helps condense forces,and accelerates the integration of global ***,it is envisaged that it will become the trend of industrial technological development in the *** consideration of the current trend of integrated development,this study evaluates a possible plan of coordinated development of fiber-optic and power networks in the Pan-Arctic ***,the backbone network architecture of Global Energy Interconnection is introduced and the importance of the Arctic energy backbone network is *** energy consumption and developmental trend of global data centers are then ***,the global network traffic is predicted and analyzed by means of a polynomial regression ***,in combination with the current construction of fiber-optic networks in the Pan-Arctic region,the advantages of the integration of the fiber-optic and power networks in this region are clarified in justification of the decision for the development of a Global Energy Interconnection scheme.

关键词： Energy Interconnection Data center Network traffic Integrated development of energy and information networks Global En ergy In terconnection

Efficacy and safety of solifenacin plus tamsulosin oral controlled absorption system in men with lower urinary tract symptoms： a meta-analysis

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Asian Journal of Andrology 2015年第1期17卷 124-134,I0011页

作者： Ming-Chao Li Zheng-Yun wang Jun Yang xiao-Lin Guo Tao wang Shao-Gang wang Ji-Hong Liu Zhang-Qun Ye Department of Urology Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan China Department of Respiratory and Critical Care Medicine Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan China.

We performed a meta-analysis to compare treatment with a combination of solifenacin plus tamsulosin oral controlled absorption system （TOCAS） with placebo or TOCAS monotherapy. The aim of the meta-analysis was to clarify the efficacy and safety of the combination treatments method for lower urinary tract symptoms （LUTS）. We searched for trials of men with LUTS that were randomized to combination treatment compared with TOCAS monotherapy or placebo. We pooled data from three placebo-controlled trials meeting inclusion criteria. Primary outcomes of interest included changes in International Prostate Symptom Score （IPSS） and urinary frequency. We also assessed postvoid residual, maximum urinary flow rate, incidence of urinary retention （UR）, adverse events. Data were pooled using random or fixed effect models for continuous outcomes and the ManteI-Haenszel method to generate risk ratio. Reductions in IPSS storage subscore and total urgency and frequency score （TUFS） were observed with solifenacin 6 mg plus TOCAS compared with placebo （P 〈 0.0001 and P 〈 0.0001, respectively）. Reductions in IPSS storage subscore and TUFS were observed with solifenacin 9 mg plus TOCAS compared with placebo （P= 0.003 and P = 0.0006, respectively）. Reductions in TUFS was observed with solifenacin 6 mg plus TOCAS compared with TOCAS （P = 0.01）. Both combination treatments were well tolerated, with low incidence of UR. Solifenacin 6 mg plus TOCAS significantly improved total IPSS, storage and voiding symptoms compared with placebo. Solifenacin 6 mg plus TOCAS also improved storage symptoms compared with TOCAS alone. There was no additional benefit of solifenacin 9 mg compared with 6 mg when used in combination with TOCAS.

关键词： combination therapy lower urinary tract symptoms solifenacin tamsulosin oral controlled absorption system

A Three-Dimensional Mn^Ⅱ-[Mo^Ⅲ(CN)7]^4-Ferrimagnet Containing Formate as a Second Bridging Ligand

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Chinese Journal of Chemistry 2019年第1期37卷 19-24页

作者： Le Shi Dong Shao Fu-Ying Shen xiao-qin Wei Xin-Yi wang State Key Laboratory of Coordination Chemistry Collaborative Innovation Center of Advanced MicrostructuresSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjingJiangsu 210023China

Summary of main observation and conclusion Serf-assembly of the [Mo(CN)7]^4-anion and the Mn^2+ ion in the aqueous solution containing ammonium formate results in a new coordination polymer,{(NH4)3[(H2O)Mn3(HCOO)][Mo(CN)7]2·4H2O}*** crystal X-ray analysis revealed a very complicated three-dimensional (3D)framework,where both the [Mo(CN)7]^4- and the formate anions act as bridges between the Mn^Ⅱ *** measurements revealed that this compound displays ferrimagnetic ordering below 70 *** antiferromagnetic interactions between the spin carriers might lead to spin frustration and non-linear alignment of the magnetic ***,this compound is the first mixed [Mo(CN)7]^4-/HCOO^- bridged molecule magnet.

关键词： Mn^2+ frustration spin X-ray act

Numerical Simulation of Soil Water Dynamics in a Drip Irrigated Cotton Field Under Plastic Mulch

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Pedosphere 2013年第5期23卷 620-635页

作者： LIU Mei-Xian YANG Jing-Song LI xiao-Ming YU Mei wang Jin State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences Institute of Subtropical Agriculture Chinese Academy of Sciences Water Conservancy Bureau of Yuhuatai Wulanwusu Agro-Meteorological Experiment Station

Drip irrigation under plastic mulch has been widely applied in arid Northwest China as a water-saving irrigation technology. A comprehensive knowledge of the distribution and movement of soil water in root zone is essential for the design and management of irrigation regimes. Simulation models have been proved to be efficient methods for this purpose. In this study, the numerical model Hydrus-2D was used to simulate the temporal variations of soil water content in a drip irrigated cotton field under mulching. A concept of partitioning coefficient, calibrated to be 0.07, was introduced to describe the effect of plastic mulch on prevention of evaporation. The soil hydraulic parameters were optimized by inverse solution using the field data. At the optimized conditions, the model was used to predict soil water content for four field treatments. The agreements between the predictions and observations were evaluated using coefficient of determination （R2） and root mean square error （RMSE）. The results suggested that the model fairly reproduced the variations in soil water content at all locations in four treatments, with R2 ranging from 0.582 to 0.826 and RMSE from 0.029 to 0.050 cm3 cm-3, indicating that the simulations agreed well with the observations.

关键词： arid area drip irrigation evapotranspiration Hydrus-2D model root zone

Optimization of Short Stroke Control Preset for Automatic Width Control of Hot Rolling Mill

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Journal of Iron and Steel Research International 2010年第6期17卷 16-20页

作者： DU xiao-zhong YANG Quan LU Cheng wang Ai-li Tieu A Kiet National Engineering Research Center for Advanced Rolling Technology University of Science and Technology Beijing Beijing 100083 China School of Materials Science and Engineering Taiyuan University of Science and Technology Taiyuan 030024 Shanxi China School of Mechanical Materials and Meehatronic Engineering University of Wollongong Wollongong NSW 2522 Australia

Automatic width control is a key issue in hot strip rolling process. The edge rolling has been widely used in the roughing stand of hot strip mill to control the width of the slab. However, the edge rolling and consequent hori- zontal rolling will cause a significant width change in the head part and tail part of the slab, which have to be trimmed before the finishing stands. Based on the width reduction deformation curve of the head and tail along the longitudinal direction of slab, the short stroke control （SSC） technology has been developed to overcome this problem. The finite element method has been used to simulate the unsteady edge rolling process. Three short stroke control curves have been compared in order to obtain the best width control result. The optimized short stroke control curve has been ap- plied to the automatic width control system of industrial hot rolling mill, and good performance is obtained.

关键词： unsteady rolling edge rolling short stroke control automatic width control LS-DYNA