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Revisiting the variations of precipitation and water vapour budget over the Tibetan Plateau

Advances in Climate Change Research 2023年第1期14卷 77-84页

作者： Ping WU Yan-Ju LIU Jing WANG yi-hui ding National Climate Center China Meteorological AdministrationBeijing 100081China Tianjin Key Laboratory for Oceanic Meteorology Tianjin Institute of Meteorological ScienceTianjin 300074China

Owing to the scarcity of observation data in the western Tibetan Plateau(TP),the knowledge of precipitation changes over the entire plateau based only on the limited data in eastern TP is not ***,the alternative high-resolution precipitation data of the China Meteorological Forcing Dataset(CMFD)are used for the comprehensive analysis of precipitation changes over the whole TP(including western and northern TP)to fill in the lack of understanding of precipitation in the western *** with observations,CMFD can broadly capture the spatial distributions and identify the temporal variabilities of precipitation over the *** with CMFD data suggested that the annual precipitation over the whole TP did not show a uniform humidification trend in 1979-2018 and featured wetting and drying trends in the northern(NTP)and southern TP(STP),***,the four seasonal regimes of precipitation over the northern TP(NTP,including most areas of western TP)all experienced a noticeable interdecadal shift around the late 1990s,followed by above-normal precip*** for spring,the seasonal precipitation over the southern TP(STP)showed interannual *** precipitation over the STP has undergone moistening since the late 1990s,which was consistent with that over the *** different reanalysis datasets,namely JRA55,MERRA2,ERA5 and CRA40,were used to compare the water vapour budget of each boundary over the *** increase in spring precipitation over the NTP and STP was found to be related to the decrease in water vapour outflow from the north *** interdecadal increase in summer precipitation over the NTP was mainly due to the reduction of outflow from the east ***,the increase in autumn precipitation was related to the increase in inflow from the west boundary.

关键词： Tibetan Plateau Precipitation Water vapour budget Reanalysis data

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下调烟粉虱MED隐种BtabCSP6表达对番茄黄化曲叶病毒传播的影响

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昆虫学报 2022年第10期65卷 1287-1294页

作者：魏艳刘勇叶倩卢丁伊慧张战泓张卓张德咏章松柏史晓斌长江大学农林病虫害预警与调控湖北省工程技术研究中心湖北荆州434025 湖南省农业科学院植物保护研究所长沙410125 湖南省农业科学院蔬菜研究所长沙410125

【目的】番茄黄化曲叶病毒(tomato yellow leaf curl virus,TYLCV)是对农业生产造成威胁的主要病毒之一,自然条件下通过媒介昆虫烟粉虱Bemisia tabaci传播。已有研究表明烟粉虱雌成虫比雄成虫具有更强的获毒与传毒能力。本研究旨在探明... 详细信息

【目的】番茄黄化曲叶病毒(tomato yellow leaf curl virus,TYLCV)是对农业生产造成威胁的主要病毒之一,自然条件下通过媒介昆虫烟粉虱Bemisia tabaci传播。已有研究表明烟粉虱雌成虫比雄成虫具有更强的获毒与传毒能力。本研究旨在探明烟粉虱化学感受蛋白(chemosensory protein,CSP)基因BtabCSP6表达对病毒传播的影响,为控制病毒发生寻找新途径。【方法】使用TYLCV侵染性克隆方法获得带毒番茄植株,微虫笼收集不带毒烟粉虱MED隐种成虫固定在感染TYLCV的番茄植株叶片获毒48 h;利用RT-qPCR技术测定分别取食感染和未感染TYLCV番茄植株的烟粉虱MED隐种雌雄成虫体内BtabCSP1-8基因表达量变化;通过饲喂法利用RNAi对烟粉虱MED隐种雌成虫BtabCSP6基因进行干扰48 h后饲喂TYLCV感染的番茄植株,测定烟粉虱MED隐种雌成虫的获毒率和传毒率。【结果】RT-qPCR检测结果表明,与未侵染的烟粉虱MED隐种雌成虫相比,侵染TYLCV的雌成虫体内BtabCSP3和BtabCSP6基因的表达量变化最为显著。同样地,在侵染TYLCV的雄成虫体内,BtabCSP4和BtabCSP6表达量的变化最为明显。饲喂dsBtabCSP648 h后,烟粉虱MED隐种雌成虫体内BtabCSP6表达量降低;取食感染TYLCV番茄植株不同时间烟粉虱MED隐种雌成虫的获毒率和不同数量雌成虫对未感染TYLCV的番茄植株的传毒率与对照相比均显著降低。【结论】下调烟粉虱MED隐种雌成虫体内BtabCSP6基因的表达,可显著降低烟粉虱MED隐种雌成虫的获毒率和传毒率,说明BtabCSP6可能影响TYLCV传播。

关键词：烟粉虱番茄黄化曲叶病毒化学感受蛋白 RNA干扰基因表达

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Susceptibility breakpoint for cefquinome against Escherichia coli and Staphylococcus aureus from pigs

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Journal of Integrative Agriculture 2021年第7期20卷 1921-1932页

作者： ZHANG hui-lin ZHAO yi-yang ZHOU Zi-chong ding Huan-zhong Guangdong Key Laboratory for Veterinary Drug Development and Safety Evaluation South China Agricultural UniversityGuangzhou 510000P.R.China

Cefquinome is the only fourth-generation cephalosporin used solely for veterinary *** this study,we established the wild-type cut-off(CO_(WT))and pharmacokinetic/pharmacodynamic cut-off(CO_(PD))of cefquinome against Escherichia coli and Staphylococcus aureus.A total of 210 *** and 160 *** isolates were collected from pigs in Guangdong Province between 2014 and *** minimum inhibitory concentrations(MICs)were determined using a microdilution broth ***_(50)and MIC_(90)were 0.06 and 0.25μg m L^(–1)for *** and 0.5 and 1μg m L^(–1)for ***,*** analysis and the ECOFFinder Program showed that the CO_(WT)for cefquinome against *** and *** were0.125 and 2μg m L^(–1),*** resistance rates were 11.9%for *** and 6.25%for *** on a5000-subject Monte Carlo simulation,the CO_(PD)value for cefquinome against *** and *** was 0.25μg m L^(–1)under the recommended dose(2 mg kg^(–1),twice a day for 3 days),confirming that infections caused by strains with MIC≤0.25μg m L^(–1)could be effectively *** adjustment of the dosing regimen to 4.5 mg kg^(–1),effective treatment(>90)was achieved for *** infections with MIC_(90)1μg m L^(–1).This susceptibility breakpoint determination is significant for resistant surveillance and cefquinome dosage guidance against *** and *** in pigs.

关键词： cefquinome Escherichia coli Staphylococcus aureus CO_(WT) CO_(PD)

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ON POTENT ELEMENTS AND PSEUDO CLEAN RINGS

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数学杂志 2025年第1期45卷 39-47页

作者： ding Yan GAO Han-peng LIU Xin-yi YAN Zi-yi ZHANG Ting School of Mathematical Sciences Anhui UniversityHefei 230601China

In this paper,potent index of an element and pseudo clean rings are *** properties and examples of pseudo clean rings are *** also show that Zm is pseudo clean for every 2≤m∈Z and pseudo clean rings are ***,we prove... 详细信息

关键词： clean rings strongly J-clean rings pseudo clean rings potent elements

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A Note on Critical p-adic L-functions

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Acta Mathematica Sinica,English Series 2021年第1期37卷 121-141页

作者： yi Wen ding Bejing International Center for Mathematical Research Peking UniversityBeijing 100871P.R.China

We study the adjunction property of the Jacquet–Emerton functor in certain neighborhoods of critical points in the *** an application,we construct two-variable p-adic L-functions around critical points via Emerton’s... 详细信息

关键词： p-adic L-function eigencurve critical p-stabilization Jacquet–Emerton functor

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PCA-Based Network Traffic Anomaly Detection

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Tsinghua Science and Technology 2016年第5期21卷 500-509页

作者： Meimei ding hui Tian School of Electronic and Information Engineering Beijing Jiaotong University Beijing 100044 China

The use of a Traffic Matrix（TM） to describe the characteristics of a global network has attracted significant interest in network performance research. Due to the high dimensionality and sparsity of network traffic, Principal Component Analysis（PCA） has been successfully applied to TM analysis. PCA is one of the most common methods used in analysis of high-dimensional objects. This paper shows how to apply PCA to TM analysis and anomaly detection. The experiment results demonstrate that the PCA-based method can detect anomalies for both single and multiple nodes with high accuracy and efficiency.

关键词： traffic matrix network performance principal component analysis anomaly detection

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数字公共性:数字乡村治理共同体的建构逻辑与优化路径

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西北农林科技大学学报（社会科学版） 2025年第1期25卷 10-16页

作者：丁波安徽大学社会与政治学院合肥230039

数字乡村建设以数字技术嵌入乡村社会,改变乡村社会的结构特征与治理模式,重构乡村治理共同体,形成具有数字公共性特征的数字乡村治理共同体。数字乡村治理共同体以数字主体、数字空间和数字场景的建构逻辑,培育数字参与理念、构建数字... 详细信息

数字乡村建设以数字技术嵌入乡村社会,改变乡村社会的结构特征与治理模式,重构乡村治理共同体,形成具有数字公共性特征的数字乡村治理共同体。数字乡村治理共同体以数字主体、数字空间和数字场景的建构逻辑,培育数字参与理念、构建数字联结纽带、搭建数字交往平台,实现数字公共性生产。数字乡村治理共同体通过治理主体的行动共建、治理方式的技术共治、治理资源的利益共享,推动乡村治理的数字赋权、数字赋能、数字赋利,有助于构建人人有责、人人尽责、人人享有的数字乡村治理共同体。

关键词：数字乡村建设数字公共性乡村治理数字乡村治理共同体

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Modeling and control of a rigid-flexible coupling robot for narrow space manipulations

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Science China Technological Sciences 2025年

作者： Kuangda CHEN Huan ZHAO Jiexin ZHANG Mei FENG yiwei WANG Jinliang WANG Han ding State Key Laboratory of Intelligent Manufacturing Equipment and Technology Huazhong University of Science and Technology Key Laboratory of CNC Equipment Reliability Ministry of Education Jilin University School of Medical Equipment Science and Engineering Huazhong University of Science and Technology

Narrow space manipulations are crucial for equipment maintenance, as they eliminate the need for disassembly, thus reducing costs and increasing efficiency. Cable-driven flexible robots possess exceptional capabilities in maneuvering through narrow spaces, thanks to their interaction compliance and distal dexterity. However, their inherent low stiffness causes a decline in the location accuracy of the robot and could even lead to manipulation failure. To address this challenge, this paper proposes a novel type of rigid-flexible coupling robot, which increases the stiffness of the robot while ensuring the reachability within a narrow space. To achieve high-accuracy location in a narrow space, kinematic and control methods are proposed. Specifically,the robot forward kinematics are uniformly represented, and the closed-form inverse kinematics solution is derived. Furthermore, in cases where the robot?s structure fails to align with Pieper?s solution, a two-stage search strategy is utilized to solve the inverse kinematics, resulting in a high success rate of 99.1%. Based on the proposed kinematics, a rigid-dominated control method is then proposed to facilitate localization and pose alignment of target objects in narrow spaces. The practical comparative experiments show that the proposed robot has the capability of high accuracy control in narrow spaces.

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Therapeutic effect of placenta-derived mesenchymal stem cells on hypoxic-ischemic brain damage in rats

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World Journal of Pediatrics 2015年第1期11卷 74-82页

作者： Hong-Fang ding hui Zhang hui-Fang ding Dong Li Xin-Hao yi Xin-yi Gao Wei-Wei Mou Xiu-Li Ju Department of Pediatrics Qilu HospitalShandong UniversityJinan 250012China Department of Pediatrics Shengli Oil Field Central HospitalDongying 257034China Department of Neurology Qingdao Municipal HospitalQingdao 266000China

Background:Oxidative stress is involved in the development of hypoxic-ischemic brain damage(HIBD).In this study,we investigated the therapeutic efcts of placenta-derived mesenchymal stem cells(PD-MSCs)and explored the N F-E2-related factor-2/heme oxygenase-1(Nrf2/HO-1)signaling pathway in treating ***:P7 rats were subjected to hypoxic-ischemic brain injury and randomly divided into four groups(control,HIBD,HIBD+PD-MSCs,and HIBD+fbroblasts).Forty-eight hours after the induction of HIBD,5×10^(5)of PD-MSCs were injected into cerebral tissue in the HIBD+PD-MSCs group,while the same dose of fibroblas ts were injected in the HIBD+fibroblasts *** Water Maze,gross and pathological changes were tested at *** level of malondialdehyde(MDA)was detected in rats'***-PCR and western blot analysis were used to evaluate the changes of Nrf2/***:The HIBD group showed significantly longer escape latency and a lower frequency of original platform crossing in the Morris Water M laze compared with the control *** receiving PD MSCs showed significant improvement of *** pathological changes were evident after HIBD,but ameliorated in the PD-MSCs *** with the control group,HO-1 and Nrf2 were up-regulated at gene and protein levels in the HI brain,beginning at 6 hours and peaking at 48 hours(P<0.05).The expression of HO-1 and Nrf2 in the PD-MSCs treatment group was more pronounced than in the HBD group(P<0.01).PD MSCs also decreased MDA production in the brain ***:These results demonstrate that PD-MSCs have neuroprotective effect during the treatment of HIBD and that the mechanism may be partly due to alleviating oxidative stress.

关键词： hypoxia-ischemia mesenchymal stem cells neonatal rat oxidative stress

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An experimental study on effects of temperature gradient on microstructure of a 308L stainless steel manufactured by directed energy deposition

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Journal of Iron and Steel Research International 2024年第8期31卷 2031-2040页

作者： Ting Dai De-yu Gu Yu-wen Qiu Wei Guo hui ding yi-wei Sun School of Materials Science and Engineering Jiangsu Key Laboratory of Advanced Metallic MaterialsSoutheast UniversityNanjing 211189JiangsuChina

The effect of spatial temperature gradient on the microstructural evolution of a 308L stainless steel during the directed energy deposition(DED)process was experimentally investigated.A novel cooling system was designed and incorporated to a DED system in order to control the temperature gradient along the deposition direction during *** deposition,the workpiece was placed on a lifting platform,and as the deposition process proceeded,the platform and workpiece were gradually lowered into cooling water so that the temperature gradient along the deposition direction could be controlled and maintained stable during the deposition *** microstructure characterization results indicated that a deposition strategy with higher G and G/R values(where G is temperature gradient and R is solidification rate)produced finer cellular grains that were better aligned with the deposition direction,while a deposition strategy with lower G and G/R values produced columnar grains with larger primary arm spacing and less aligned with the deposition direction.

关键词： Additive manufacturing Directed energy deposition Stainless steel Microstructure Temperature gradient

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