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Ecological Economy 2024年第1期20卷 2-24页

作者： SHI Xiong-tian WU Feng-qing CHEN Yang dai li-li School of Business Administration and Tourism Management Yunnan UniversityKunming 650500CHINA School of Economics and Management Yanshan UniversityQinhaungdao 066000CHINA Business School University of SouthamptonSouthampton SO152UAUK

Based on the supply-side perspective,the improved STIRPAT model is applied to reveal the mechanisms of supply-side factors such as human,capital,technology,industrial synergy,institutions and economic growth on carbon emissions in the Yangtze River Delta(YRD)through path analysis,and to forecast carbon emissions in the YRD from the baseline scenario,factor regulation scenario and integrated scenario to reach the *** results show that:(1)Jiangsu's high carbon emission pattern is the main reason for the YRD hindering the synergistic regulation of carbon emissions.(2)Human factors,institutional factors and economic growth factors can all contribute to carbon emissions in the YRD region,while technological and industrial factors can generally suppress carbon emissions in the YRD region.(3)Under the capital regulation scenario,the YRD region has the highest level of carbon emission synergy,with Jiangsu reaching its peak five years *** the balanced regulation scenario,the YRD region as a whole,Jiangsu,Zhejiang and Anhui reach the peak as scheduled.

关键词： Yangtze River Delta carbon peaking scenario forecasting STIRPAT model

基于PI3K/Akt信号通路研究灯盏花乙素对子宫内膜癌Ishikawa细胞的影响

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中国临床药理学杂志 2024年第1期40卷 27-31页

作者：代丽丽王景魏许瑞马庆亚王娜都治香河北医科大学第一医院产科河北石家庄050000 河北医科大学第一医院妇科河北石家庄050000

目的研究灯盏花乙素对子宫内膜癌Ishikawa细胞的影响,并分析与磷脂酰肌醇3激酶(PI3K)/蛋白激酶B(Akt)信号通路的相关性。方法将Ishikawa细胞分为空白组及低、中、高剂量实验组,分别用含0、5、10及20μmol·L-1的灯盏花乙素的完全培养基... 详细信息

目的研究灯盏花乙素对子宫内膜癌Ishikawa细胞的影响,并分析与磷脂酰肌醇3激酶(PI3K)/蛋白激酶B(Akt)信号通路的相关性。方法将Ishikawa细胞分为空白组及低、中、高剂量实验组,分别用含0、5、10及20μmol·L-1的灯盏花乙素的完全培养基处理。用细胞计数试剂盒-8(CCK-8)实验检测细胞活力;用平板克隆实验检克隆形成能力;用划痕及Transwell实验检测转移及侵袭能力;用流式细胞术检测凋亡;用蛋白质印迹法检测蛋白表达情况。结果空白组和低、中、高剂量实验组48 h的细胞活力分别为(100.00±0.00)%、(78.51±7.54)%、(52.93±4.91)%和(41.62±5.33)%;克隆形成率分别为(100.00±0.00)%、(56.59±6.34)%、(35.23±4.62)%和(10.66±1.91)%;划痕愈合率分别为(53.70±6.19)%、(40.59±4.75)%、(34.25±4.40)%和(15.78±2.14)%;侵袭细胞数分别为(189.70±14.06)、(106.82±12.67)、(84.37±8.13)和(53.74±6.78)个;基质金属蛋白酶-2(MMP-2)蛋白相对表达水平分别为0.96±0.10、0.73±0.06、0.68±0.08和0.42±0.05;MMP抑制药-1(TIMP-1)蛋白相对表达水平分别为0.35±0.04、0.51±0.05、0.74±0.08和1.20±0.14;细胞凋亡率分别为(4.21±0.53)%、(15.83±2.42)%、(22.72±3.85)%和(34.41±4.67)%;B淋巴细胞瘤-2(Bcl-2)蛋白表达水平分别为1.38±0.15、0.90±0.10、0.56±0.06和0.24±0.03;Bcl-2相关X蛋白(Bax)表达水平分别为0.31±0.02、0.44±0.04、0.93±0.11和1.26±0.14;PI3Kp85蛋白表达水平分别为0.67±0.05、0.42±0.04、0.36±0.02和0.28±0.03;磷酸化Akt(p-Akt)蛋白表达水平分别为0.78±0.06、0.53±0.04、0.46±0.05和0.42±0.03;低、中、高剂量实验组上述指标与空白组比较,差异均有统计学意义(P<0.05或P<0.01)。结论灯盏花乙素可以通过调控PI3K/Akt信号通路抑制Ishikawa细胞增殖、转移及侵袭,并诱导其凋亡。

关键词：灯盏花乙素子宫内膜癌转移侵袭凋亡

Balance energy-efficient and real-time with reliable communication protocol for wireless sensor network

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The Journal of China Universities of Posts and Telecommunications 2013年第1期20卷 37-46页

作者： liU Zhi-xin dai li-li MA Kai GUAN Xin-ping Institute of Electrical Engineering Yanshan University School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University

In many wireless sensor network applications, it should be considered that how to trade off the inherent conflict between energy efficient communication and desired quality of service such as real-time and reliability of transportation. In this paper, a novel routing protocols named balance energy-efficient and real-time with reliable communication （BERR） for wireless sensor networks （WSNs） are proposed, which considers the joint performances of real-time, energy efficiency and reliability. In BERR, a node, which is preparing to transmit data packets to sink node, estimates the energy cost, hop count value to sink node and reliability using local information gained from neighbor nodes. BERR considers not only each sender＇ energy level but also that of its neighbor nodes, so that the better energy conditions a node has, the more probability it will be to be chosen as the next relay node. To enhance real-time delivery, it will choose the node with smaller hop count value to sink node as the possible relay candidate. To improve reliability, it adopts retransmission mechanism. Simulation results show that BERR has better performances in term of energy consumption, network lifetime, reliability and small transmitting delay.

关键词： wireless sensor network tradeoff energy efficiency real-time reliable communication retransmission lifetime of network

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黄连膏抗过敏作用机制初步研究

新疆中医药 2024年第2期42卷 1-3页

作者：戴丽莉卢军赵翡翠赵生俊新疆医科大学附属中医医院新疆乌鲁木齐830000 新疆维吾尔自治区中药炮制重点实验室新疆乌鲁木齐830000

目的探究黄连膏的抗过敏作用。方法取KM小鼠随机分为空白组、模型组、阳性组、基质组、黄连膏低、中、高剂量组,采用2,4-二硝基氯苯(2,4-dinitrochlorobenzene,DNCB)致小鼠过敏性皮炎模型,研究黄连膏抗过敏作用。结果黄连膏可显著抑制D... 详细信息

目的探究黄连膏的抗过敏作用。方法取KM小鼠随机分为空白组、模型组、阳性组、基质组、黄连膏低、中、高剂量组,采用2,4-二硝基氯苯(2,4-dinitrochlorobenzene,DNCB)致小鼠过敏性皮炎模型,研究黄连膏抗过敏作用。结果黄连膏可显著抑制DNCB诱发湿疹小鼠的耳肿胀度,明显改善湿疹小鼠耳组织病理皮损,显著降低耳组织表皮厚度,减少真皮层肥大细胞数目,并且可显著抑制小鼠血清中总IgE水平和血清特异IgE水平。结论黄连膏具有明显的抗过敏作用,其抗过敏作用主要与减轻炎性损伤、抑制免疫反应及降低总IgE水平和血清特异IgE水平有关。

关键词：黄连膏小鼠过敏性皮炎模型抗过敏耳肿胀度

Prenatal cadmium exposure impairs neural tube closure via inducing excessive apoptosis in neuroepithelium

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Journal of Environmental Sciences 2024年第4期138卷 572-584页

作者： Shiyong Zhu Xuenan li Xueyan dai Jinlong li College of Veterinary Medicine Northeast Agricultural UniversityHarbin 150030China Key Laboratory of the Provincial Education Department of Heilongjiang for Common Animal Disease Prevention and Treatment Northeast Agricultural UniversityHarbin 150030China Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine Northeast Agricultural UniversityHarbin 150030China

Birth defects have become a public health *** hazardous environmental factors exposure to embryos could increase the risk of birth ***,a toxic environmental factor,can cross the placental barrier during *** woman may be subjected to cadmium before taking precautionary protective ***,the link between birth defects and cadmium remains *** exposure can induce excessive apoptosis in neuroepithelium during embryonic development *** exposure activated the p53 via enhancing the adenosine 5‘-monophosphate(AMP)-activated protein kinase(AMPK)and reactive oxygen species'(ROS)*** cadmium decreases the level of Paired box 3(Pax3)and murine double minute 2(Mdm2),disrupting the process of p53 *** p53 accumulation induced excessive apoptosis in neuroepithelium during embryonic development *** apoptosis led to the failure of neural tube *** study emphasizes that environmental materials may increase the health risk for *** caused the failure of neural tube closure during early embryotic *** women may be exposed by cadmium before taking precautionary protective actions,because of cadmium concentration-containing foods and environmental tobacco *** suggests that prenatal cadmium exposure is a threatening risk factor for birth defects.

关键词： Cadmium Neural tube closure Excessive apoptosis p53 Embryogenesis

Effect of streamlined nose length on aerodynamic performance of high-speed train with a speed of 400 km/h

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2024年第7期25卷 525-540页

作者： Nianxun li Tian li Zhiyuan dai Deng QIN Jiye ZHANG State Key Laboratory of Rail Transit Vehicle System Southwest Jiaotong UniversityChengdu 610031China

The streamlined nose length(SNL)plays a crucial role in determining the aerodynamic performance of high-speed *** appropriate SNL can not only effectively reduce the magnitude of aerodynamic drag and lift forces,but also improve the performance of the high-speed train in tunnel passing and crosswind *** this study,a numerical simulation of the aerodynamic performance of high-speed trains at a speed of 400 km/h,with varying SNLs,is conducted using the k-ωshear stress transport(SST)turbulence *** different SNLs include 6.0,7.0,8.0,9.0,9.8,12.0,15.0,and 18.0 *** order to validate the accuracy of the numerical simulation,its results are compared with wind tunnel test data obtained from the *** simulation is carried out using compressible and incompressible gases to determine the effect of gas compressibility on *** impact of SNL on the aerodynamic performance of the trains is analyzed in terms of aerodynamic forces,velocity,and pressure *** comparison to the original train,the train with a 6.0 m SNL experienced a 10.8%increase in overall aerodynamic ***,the lift forces on the head and tail cars increased by 35.7%and 75.5%,*** the other hand,the train with an 18.0 m SNL exhibited a 16.5%decrease in aerodynamic ***,the lift forces on the head and tail cars decreased by 21.9%and 49.7%,*** aerodynamic drag force of the entire train varies linearly with the SNL,while the aerodynamic lift of the tail car follows a quadratic function in relation to the SNL.

关键词： Streamlined nose length(SNL) High-speed train Aerodynamic performance Numerical simulation Flow structures

Study on End-to-End Web Performance

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The Journal of China Universities of Posts and Telecommunications 2004年第Z1期11卷 70-75页

作者： GAO Ke-li dai li-zhong Beijing University of Posts and Telecommunications Beijing 100876 P.R.China Beijing University of Posts and Telecommunications Beijing 100876 P.R.China

While there are lots of papers discussing one or more aspects of web performance, there are few papers talking of web performance as a whole. This paper most thoroughly discusses aspects that influence web performance and current known web techniques. In addition, we discussed the general methods of web performance measurement and explained the discrepancies between our results and those of others. Finally, we analyzed the bottlenecks of web and come up with possible solutions.

关键词： Web performance CDN HTTP DNS

Selection of Parents for Breeding Edible Varieties of Sweetpotato with High Carotene Content

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Agricultural Sciences in China 2009年第10期8卷 1166-1173页

作者： MA dai-fu li Qiang li Xiu-ying li Hong-min TANG Zhong-hou HU ling CAO Qing-he XIE Yi-ping WANGXin Sweetpotato Research institute Chinese Academy of Agricultural Sciences~National Sweetpotato Improvement Center Xuzhou 221121P.R. China

Sweetpotato varieties with high carotene content have high value for human health. This work aims to improve the breeding efficiency of special varieties with high carotene content by combining molecular markers and agronomic traits to evaluate and screen the parents. The cluster analysis was carried out to identify and screen promising parents by utilizing phenotypic results of the agronomic and characteristic traits, and RAPD and ISSR markers of 15 parents and their offspring by group crossing. Among different parental materials, greater variations were observed in two important traits, the carotene content and the storage root yield. Negative correlation was found between the carotene content and both fresh and dried root yields. The most significant positive correlation was between the carotene content of parents and that of their offspring, with the coefficient of correlation value of 0.7932＊＊. The relationship based on the agronomic characters of the trial materials was not in agreement with the known genealogy, while that based on the molecular marker data showed better result. Each primer amplified 13.8 bands oflSSR markers on average, in which the rate of polymorphic loci was 89.6%. 9.4 bands of RAPD markers were arnplified per primer, in which the rate of polymorphic bands was 74.46%. Large genetic variation of carotene content was found among the parents. For analyzing the genetic diversity of sweetpotato, the molecular marker methods were better than morphological traits; ISSR markers were more efficient than RAPD markers. The combination of molecular markers and agronomic trait analysis may provide valuable theoretic basis for selection of parents to breed new varieties with high carotene content.

关键词： sweetpotato carotene selection of parents RAPD ISSR cluster analysis

Research on the Control Strategy of Micro Wind-Hydrogen Coupled System Based on Wind Power Prediction and Hydrogen Storage System Charging/Discharging Regulation

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Energy Engineering 2024年第6期121卷 1607-1636页

作者： Yuanjun dai Haonan li Baohua li College of Machine Shanghai DianJi UniversityShanghai201306China

This paper addresses the micro wind-hydrogen coupled system,aiming to improve the power tracking capability of micro wind farms,the regulation capability of hydrogen storage systems,and to mitigate the volatility of wind power generation.A predictive control strategy for the micro wind-hydrogen coupled system is proposed based on the ultra-short-term wind power prediction,the hydrogen storage state division interval,and the daily scheduled output of wind power *** control strategy maximizes the power tracking capability,the regulation capability of the hydrogen storage system,and the fluctuation of the joint output of the wind-hydrogen coupled system as the objective functions,and adaptively optimizes the control coefficients of the hydrogen storage interval and the output parameters of the system by the combined sigmoid function and particle swarm algorithm(sigmoid-PSO).Compared with the real-time control strategy,the proposed predictive control strategy can significantly improve the output tracking capability of the wind-hydrogen coupling system,minimize the gap between the actual output and the predicted output,significantly enhance the regulation capability of the hydrogen storage system,and mitigate the power output fluctuation of the wind-hydrogen integrated system,which has a broad practical application prospect.

关键词： Micro wind-hydrogen coupling system ultra-short-term wind power prediction sigmoid-PSO algorithm adaptive roll optimization predictive control strategy

Potential effects of automated driving on vehicle travel demand: A comparison of three case cities

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Journal of Traffic and Transportation Engineering(English Edition) 2024年第2期11卷 348-361页

作者： Jingchen dai Ruimin li Zhiyong liu School of Civil Engineering Tsinghua UniversityBeijing 100084China Hang Lung Center for Real Estate Tsinghua UniversityBeijing 100084China School of Traffic and Transportation Beijing Jiaotong UniversityBeijing 100044China

Automated vehicles(AVs)hold the potential to reduce road accidents,mitigate traffic congestion,and improve travel ***,the possible countervailing impacts from the changes in underserved populations’vehicle travel demand tend to be *** determine the vehicle travel demand changes that resulted from underserved populations aged between 6 and 80,this paper explores the latent effect of AVs on vehicle kilometers traveled(VKT)in a fully AV environment using person trip survey data from the cities of Sanya,Shijiazhuang,and Shenzhen in *** paper uses the natural decline hypothesis of travel demand and proposes a regression model to investigate the difference among the cities’latent vehicle travel *** show that the average VKT of the overall population in Sanya,Shijiazhuang,and Shenzhen increased by 33.4%,47.0%,and46.8%,*** analysis of the regression model confirms that the current travel behavior of individuals can affect the degree of increase in their average *** AVs into public transport,increasing the acceptance of automated shared mobility options,transforming road space use type,and prototyping AV designs with various features and needs are potential methods to cope with the countervailing *** total VKT of the overall population increased by approximately 10%-25%depending on the *** conclusions of this paper provide informative insights into the evaluation of VKT for underserved populations and contribute to the deployment of AVs to address equity and inclusion issues.

关键词： Automated vehicles Vehicle kilometers traveled Aging population Travel behavior Natural decline hypothesis