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Remote sensing-based dynamic monitoring and environmental change of wetlands in southern Mongolian Plateau in 2000‒2018

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China Geology 2021年第2期4卷 353-363页

作者： Wen-hui Jie Chun-lei Xiao Ce Zhang En Zhang Jing-yue Li Bing Wang Hai-wei Niu shuang-fa dong Airborne Survey and Remote Sensing Center of Nuclear Industry Shijiazhuang 050002China Hebei Key Laboratory of Airborne Survey and Remote Sensing Technology Shijiazhuang 050002China China Aero Geophysical Survey and Remote Sensing Center for Natural Resources China Geological SurveyBeijing 100083China

The environmental change in the wetlands in the southern Mongolian Plateau has important impacts on the environment of North China and even the entire Northeast Asia,from which the global climate change can be understood on a large scale,especially the climate change in the Mongolian *** study extracted the information on the wetlands from three stages of remote sensing images(also referred to as RS images)of the study area,including Enhanced Thematic Mapper Plus(ETM+)images of 2000,TM images of 2010,and Landsat 8 Operational Land Imager(OLI)images of *** indicated by the extraction results,the area of wetlands decreased from 796.90 km^(2) of 2000 to 666.24 km^(2) of 2018 at a rate of 7.26 km^(2)/*** reduced area is 130.66 km^(2),which is about 16.4%*** the patch number of wetlands decreased from 731 of 2000 to 316 of 2018 in the study area,approximately 56.8%reduction(415 patches),and the decrease in the area of the wetlands mainly occurred in the northwest endorheic *** terms of wetland types,the change of the wetlands was dominated by the decrease of lacustrine wetlands,of which the area and patch number decreased by 106.2 km^(2) and 242,***,the area of the lacustrine wetlands decreased at the highest rate of 8.70 km^(2)/a in 2010‒*** the perspective of spatial distribution,the wetlands in the western part shrunk more notably than those in the eastern part as a whole in the study *** to local meteorological data,the precipitation gently decreased and the temperature increased(about 1.7℃)from ***,the decrease in the area of the wetlands and the temperature rises in the study area were mainly driven by the Mongolian monsoon climate,reduction in precipitation,and human activities.

关键词： Wetlands Environmental change Global climate change Remote sensing Dynamic monitoring Southern Mongolian Plateau

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Risk factors of gastroparesis syndrome after abdominal nongastroduodenal operation and its prevention

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Asian Pacific Journal of Tropical Medicine 2013年第6期6卷 497-499页

作者： dong-dong Yang Kun He Xue-Liang Wu Li-Kun Yang shuang-fa Nie First Affiliated Hospital Hebei North University

Objective:To investigate risk factors of gastroparesis syndrome(PGS) after abdominal nongastroduodenal operation and its ***:Clinical data of 22 patients with PGS after abdominal non-gastroduodenal operation was analyzed retrospectively,and compared with the patients of non-PGS after abdominal non-gastroduodenal operation during the same *** possible influencing factors of PCS were analyzed by single factor analysis and logistic regression ***:All t3 selected factors related with PGS,including age,disease category (benign and malignant),operation time,intraoperative blood loss,postoperative analgesic pump, postoperative enteral nutrition time,postoperative parenteral nutrition time,perioperative blood glucose level,perioperative nutrition status(anaemia or lower proleinemia),pylorus obstruction before surgery,intra-abdominal infection after surgery,and spiritual factor were related with *** statistical analysis showed that the difference was statistical significant(P0.05);non-conditional multivariate analysis showed that malignant tumor,perioperative nutrition status,pylorus obstruction,operation time,blood loss, intra-abdominal infection after surgery,and mental factor were significant related with PGS as dependent variable and related risk factors in single factor analysis as independent variables (P factors,and among these factors,malignant tumor,poor nutrition status,pylorus obstruction before surgery,longer operation—time,more blood loss,intra-abdominal infection after surgery,and mental factor are major risk factors of PGS.

关键词： Abdominal non-gastroduodenal operation Postsurgical gastroparesis syndrome Risk factors Comparative analysis

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EXPANSIONS OF STEP-TRANSITION OPERATORS OF MULTI-STEP METHODS AND ORDER BARRIERS FOR DAHLQUIST PAIRS

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Journal of Computational Mathematics 2006年第1期24卷 45-58页

作者： Quan-dong Feng Yi-fa Tang LSEC ICMSEC Academy of Mathematics and System Sciences Chinese Academy of Sciences Beijing 100080 China Graduate School of the Chinese Academy of Sciences Beijing 100080 China

Using least parameters, we expand the step-transition operator of any linear multi-step method （LMSM） up to O（τ^s＋5） with order s = 1 and rewrite the expansion of the steptransition operator for s = 2 （obtained by the second author in a former paper）. We prove that in the conjugate relation G3^λτ o G1^τ =G2^τ o G3^λτ with G1 being an LMSM,（1） theorder of G2 can not be higher than that of G1; （2） if G3 is also an LMSM and G2 is a symplectic B-series, then the orders of G1, G2 and G3 must be 2, 2 and 1 respectively.

关键词： Linear Multi-Step Method Step-Transition Operator B-series Dahlquist(Conjugate) pair Symplecticity

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Tumor recurrence and survival prognosis in patients with advanced gastric cancer after radical resection with radiotherapy and chemotherapy

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World Journal of Gastrointestinal Surgery 2024年第6期16卷 1660-1669页

作者： shuang-fa Nie Chen-Yang Wang Lei Li Cheng Yang Zi-Ming Zhu Jian-dong Fei Department of General Surgery The First Affiliated Hospital of Hebei North UniversityZhangjiakou 75000Hebei ProvinceChina Department of Gastrointestinal Surgery Zhongshan Hospital of Fudan UniversityShanghai 200032China

BACKGROUND Advanced gastric cancer is a common malignancy that is often diagnosed at an advanced stage and is still at risk of recurrence after radical surgical ***,as one of the important treatment methods for gastric cancer,is of great significance for improving the survival rate of ***,the tumor recurrence and survival prognosis of gastric cancer patients after radio-therapy and chemotherapy are still *** To analyze the tumor recurrence after radical radiotherapy and chemotherapy for advanced gastric cancer and provide more in-depth guidance for *** A retrospective analysis was performed on 171 patients with gastric cancer who received postoperative adjuvant radiotherapy and chemotherapy in our hospital from 2021 to *** Kaplan-Meier method was used to calculate the recurrence rate and survival rate;the log-rank method was used to analyze the single-factor prognosis;and the Cox model was used to analyze the prognosis associated with multiple *** The median follow-up time of the whole group was 63 months,and the follow-up rate was 93.6%.Stage Ⅱ and Ⅲ patients accounted for 31.0%and 66.7%,*** incidences of Grade 3 and above acute gastrointestinal reactions and hematological adverse reactions were 8.8%and 9.9%,respectively.A total of 166 patients completed the entire chemoradiotherapy regimen,during which no adverse reaction-related deaths *** terms of the recurrence pattern,17 patients had local recurrence,29 patients had distant metastasis,and 12 patients had peritoneal implantation *** 1-year,3-year,and 5-year overall survival(OS)rates were 83.7%,66.3%,and 60.0%,*** 1-year,3-year,and 5-year disease-free survival rates were 75.5%,62.7%,and 56.5%,*** analysis revealed that T stage,peripheral nerve invasion,and the lymph node metastasis rate(LNR)were independent prognostic factors for *** Postoperative intensity-

关键词： Tumor recurrence Survival prognosis Advanced gastric cancer Radical resection Retrospective study

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Novel nanofiltration membranes with tunable permselectivity by polymer mediated phase separation in polyamide selective layer

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Chinese Journal of Chemical Engineering 2016年第11期24卷 1533-1540页

作者： Zhuan Yi fa-dong Wu Yong Zhou Cong-jie Gao Department of Ocean Zhejiang University of Technology Hangzhou 310014 China Water Treatment Technology Development Center Hangzhou 310012 China

Microstructure in selective layer has played a decisive role in permselectivity of nanofiltration(NF) membranes,and nanomaterials were well-known additives that had been applied to mediate the microstructure and permeability of polyamide NF membranes. However, nanoadditives generally displayed a poor dispersion in membranes or in fabrication process. To solve this problem, we showed an interesting concept that novel NF membranes with hybrid selective layer consisting of flexible polyisobutylene(PIB) and rigid polyamide could be fabricated from well-defined interfacial polymerization. The hydrophobic polymer mediated phase separation and microdomains formation in polyamide layer were found. The immiscibility between the rigid polyamide and flexible PIB as well as the resultant interface effect was interpreted as the reason for the polymer enhanced permselectivity, which was similar with the well-known thin film nanocomposite(TFN) membranes that nanoparticles incorporated contributed significantly to membrane permeability and rejection *** results have demonstrated that novel NF membranes with enhanced performance can be prepared from immiscible polymers, which is a new area that has not been extensively studied before.

关键词： Nanofiltration membranes Interfacial polymerization Polymer additive Hydrophobicity fabrication

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fast-armored target detection based on multi-scale representation and guided anchor

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Defence Technology（防务技术） 2020年第4期16卷 922-932页

作者： fan-jie Meng Xin-qing Wang fa-ming Shao dong Wang Xiao-dong Hu Department of Mechanical Engineering College of Field EngineeringArmy Engineering University of PLANanjing210007China

Focused on the task of fast and accurate armored target detection in ground battlefield,a detection method based on multi-scale representation network(MS-RN) and shape-fixed Guided Anchor(SF-GA)scheme is ***,considering the large-scale variation and camouflage of armored target,a new MS-RN integrating contextual information in battlefield environment is *** MS-RN extracts deep features from templates with different scales and strengthens the detection ability of small *** targets of different sizes are detected on different representation ***,aiming at the accuracy and real-time detection requirements,improved shape-fixed Guided Anchor is used on feature maps of different scales to recommend regions of interests(ROIs).Different from sliding or random anchor,the SF-GA can filter out 80% of the regions while still improving the recall.A special detection dataset for armored target,named Armored Target Dataset(ARTD),is constructed,based on which the comparable experiments with state-of-art detection methods are *** results show that the proposed method achieves outstanding performance in detection accuracy and efficiency,especially when small armored targets are involved.

关键词： red image RPN fast-armored target detection based on multi-scale representation and guided anchor

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Impact Analysis of Air Gap Motion with Respect to Parameters of Mooring System for Floating Platform

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China Ocean Engineering 2017年第2期31卷 141-150页

作者： SHEN Zhong-xiang HUO fa-li NIE Yan LIU Yin-dong Transportation Equipments and Ocean Engineering College Dalian Maritime University Dalian 116026 China School of Naval Architecture and Offshore Engineering Jiangsu University of Science and Technology Zhenjiang 212003 China Grenland Group (China) Ltd. Shanghai 201206 China

In this paper, the impact analysis of air gap concerning the parameters of mooring system for the semi-submersible platform is conducted. It is challenging to simulate the wave, current and wind loads of a platform based on a model test simultaneously. Furthermore, the dynamic equivalence between the truncated and full-depth mooring system is still a tuff work. However, the wind and current loads can be tested accurately in wind tunnel model. Furthermore, the wave can be simulated accurately in wave tank test. The full-scale mooring system and the all environment loads can be simulated accurately by using the numerical model based on the model tests simultaneously. In this paper, the air gap response of a floating platform is calculated based on the results of tunnel test and wave tank. Meanwhile, full-scale mooring system, the wind, wave and current load can be considered simultaneously. In addition, a numerical model of the platform is tuned and validated by ANSYS AQWA according to the model test results. With the support of the tuned numerical model, seventeen simulation cases about the presented platform are considered to study the wave, wind, and current loads simultaneously. Then, the impact analysis studies of air gap motion regarding the length, elasticity, and type of the mooring line are performed in the time domain under the beam wave, head wave, and oblique wave conditions.

关键词： mooring system air gap floating platform

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Pricing Decisions in Dual-Channel Closed-Loop Supply Chain Under Retailer’s Risk Aversion and fairness Concerns

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Journal of the Operations Research Society of China 2021年第3期9卷 641-657页

作者： Chun-fa Li Xue-Qing Guo dong-Lei Du Department of Management Tianjin University of TechnologyTianjin 300384China faculty of Management University of New BrunswickFrederictonNB E3B 5A3Canada

This paper studies the price decisions in a dual-channel closed-loop supply chain with a risk-averse retailer and a risk-neutral manufacturer by modeling and analyzing three cases:(1)the retailer does not have fairness concerns;(2)the retailer has fairness concerns and the manufacturer considers it;and(3)the retailer has fairness concerns and the manufacturer does not consider *** effects of risk aversion and fairness concerns on the pricing decisions,profits and demand are examined in differing scenarios.

关键词： Risk aversion fairness concerns Dual-channel Closed-loop supply chain

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Structural Synthesis of Parallel Mechanisms with High Rotational Capability

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Chinese Journal of Mechanical Engineering 2018年第4期31卷 73-83页

作者： Xiao-dong Jin Yue-fa fang Sheng Guo Hai-Bo Qu School of Mechanical Electronic and Control EngineeringBeijing

Most parallel mechanisms(PMs) encountered today have a common disadvantage, i.e., their low rotational *** order to develop PMs with high rotational capability, a family of novel manipulators with one or two dimensional rotations is proposed. The planar one-rotational one-translational(1 R1 T) and one-rotational two-translational(1 R2 T)PMs evolved from the crank-and-rocker mechanism(CRM) are presented by means of Lie group theory. A spatial 2 R1 T PM and a 2 R parallel moving platform with bifurcated large-angle rotations are proposed by orthogonal combination of the RRRR limbs. According to the product principle of the displacement group theory, a hybrid 2 R3 T mechanism in possession of bifurcated motion is obtained by connecting the 2 R parallel moving platform with a parallel part, which is constructed by four 3 T1 R kinematic chains. The presented manipulators possess high rotational capability. The proposed research enriches the family of spatial mechanisms and the construction method provides an instruction to design more complex mechanisms.

关键词： Parallel mechanism Rotational capability Lie group theory Bifurcated motion Hybrid mechanism

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Highly selective CO methanation over amorphous Ni-Ru-B/ZrO_2 catalyst

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Chinese Chemical Letters 2009年第8期20卷 889-892页

作者： Qi Hai Liu Xin fa dong Wei Ming Lin School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 China

Amorphous Ni-Ru-B/ZrO2 catalyst was prepared by the means of chemical reduction, and selective CO methanation as a strategy for CO removal in fuel processing applications was investigated over the amorphous Ni-Ru-B/ZrO2 catalyst. The result showed that, at the temperature of 210-230 ℃, the catalyst was shown to be capable of reducing CO in a hydrogen-rich reformate to less than 10 ppm, while keeping the CO2 conversion below 1.55% and the hydrogen consumption below 6.50%. ？2009 Xin fa dong. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.

关键词： Selective methanation CO Amorphous Ni-Ru-B/ZrO2 catalyst

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