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Reducing Operation Emissions and Improving Work Efficiency Using a Pure Electric Wheel Drive Tractor

Engineering 2024年第6期37卷 230-245页

作者： Chang-kai Wen Wen Ren Qing-Zhen Zhu Chun-Jiang Zhao Zhen-Hao Luo Sheng-Li Zhang Bin Xie Zhi-jun Meng Research Center of Intelligent Equipment Beijing Academy of Agriculture and Forestry SciencesBeijing 100097China State Key Laboratory of Intelligent Agricultural Power Equipment Beijing 100097China BYD Company Limited Shenzhen 518118China College of Agricultural Engineering Jiangsu UniversityZhenjiang 212013China College of Engineering China Agricultural UniversityBeijing 100083China

In response to the problems of excessive greenhouse-gas and particulate emissions and the low traction efficiency of conventional diesel tractors in the field,a purely electric wheel-side drive tractor was studied,including an electric motor drive system,a battery ballast system,and an electro–hydraulic suspension *** paper develops a dynamics model of an electric tractor-ploughing unit under complex soil conditions,leading to the proposal of an active control method for drive wheel torque and a joint control method for the traction force of the suspension system and the front-and rear-axle loads of a ***,the tractor is prototyped and assembled,and ploughing tests are carried *** ploughing results show that the active torque-distribution control method proposed in this study reduces the tractor slip by 14.83%and increases the traction efficiency by 10.28%compared with the average torquedistribution *** with the conventional traction control mode,the joint control method for traction and ballast proposed in this paper results in a 3.7%increase in traction efficiency,a 15.05%decrease in slip,and a 4.9%reduction in total drive motor energy *** study will help to improve the operation quality and traction efficiency of electric tractors in complex soil conditions.

关键词： Electric tractor Ploughing unit Torque distribution Active ballast Traction performance

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Impact of baseline steroids on the efficacy of neoadjuvant immunochemotherapy in locally advanced esophageal squamous cell carcinoma

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World Journal of Gastrointestinal Oncology 2024年第9期16卷 3887-3897页

作者： Yuan-Heng Huang Guo-Zhen yang Hui-Guo Chen Xiao-jun Li Yong-Hui Wu kai Zhang Jian-Nan Xu Jian Zhang Department of Cardiothoracic Surgery The Third Affiliated Hospital of Sun Yat-sen UniversityGuangzhou 510630Guangdong ProvinceChina State Key Laboratory of Oncology in South China Collaborative Innovation Center of Cancer MedicineGuangzhou 510060Guangdong ProvinceChina Guangdong Esophageal Cancer Institute Guangzhou 510060Guangdong ProvinceChina

BACKGROUND Immunochemotherapy involving the combination of programmed cell death 1/programmed cell death ligand 1 inhibitors with chemotherapy has advanced the treatment of locally advanced esophageal squamous cell carcinoma(ESCC).The use of corticosteroids as pretreatment might reduce immunotherapy *** To investigate the impact of baseline corticosteroid use on neoadjuvant immunochemotherapy(nIC)outcomes in locally advanced ESCC *** Patients with locally advanced ESCC who received nIC at Sun Yat-sen University Cancer Center and the Third Affiliated Hospital of Sun Yat-sen University were *** were divided into dexamethasone and antihistamine groups on the basis of the administered *** efficacy and safety were evaluated,as well as its impact on short-term efficacy[complete pathological response(pCR),major pathological response(MPR)]and long-term efficacy[overall survival(OS),progression-free survival(PFS)]of *** From September 2019 to September 2023,142 patients were *** severe treatment-related adverse events or deaths were *** occurrence was greater in the antihistamine group(P=0.014).Short-term efficacy was not significantly different:The pCR rates were 29.9%and 40.0%,and the MPR rates were 57.9%and 65.7%in the dexamethasone and antihistamine groups,*** long-term efficacy was not significantly different:The 2 years OS rates were 95.2%and 93.5%,and the 2 years PFS rates were 90.3%and 87.8%.Subgroup analysis revealed no difference in OS between the 20 mg dexamethasone group and the<20 mg dexamethasone group,but PFS was significantly greater in the 20 mg dexamethasone group(93.9%vs 56.4%,P=0.001).CONCLUSION Dexamethasone or antihistamines can be used before nIC in locally advanced ESCC without affecting short-or long-term *** 20 mg dexamethasone before nIC may improve PFS in ESCC.

关键词： Esophageal squamous cell carcinoma Neoadjuvant immunochemotherapy Dexamethasone Antihistamines Treatment efficacy

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High-rate CH_(4)-to-C_(2)H_(6) photoconversion enabled by Au/ZnO porous nanosheets under oxygen-free system

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Science China Chemistry 2024年第3期67卷 869-875页

作者： kai Zheng Xiaojing Zhang jun Hu Chengbin Xu juncheng Zhu Jing Li Mingyu Wu Shan Zhu Li Li Shumin Wang Yumei Lv Xin He Ming Zuo Chengyuan Liu yang Pan junfa Zhu Yongfu Sun Yi Xie Hefei National Laboratory for Physical Sciences at Microscale National Synchrotron Radiation LaboratoryUniversity of Science and Technology of ChinaHefei 230026China Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China State Grid Anhui Electric Power Research Institute Hefei 230601China

Photocatalytic CH_(4) coupling into high-valued C_(2)H_(6) is highly attractive,whereas the photosynthetic rate,especially under oxygen-free system,is still ***,we designed the negatively charged metal supported on metal oxide nanosheets to activate the inert C-H bond in CH_(4)and hence accelerate CH_(4) coupling *** an example,the synthetic Au/ZnO porous nanosheets exhibit the C_(2)H_(6) photosynthetic rate of 1,121.6μmol g^(-1)_(cat)h^(-1)and the CH_(4) conversion rate of 2,374.6μmol g^(-1)_(cat)h^(-1) under oxygen-free system,2 orders of magnitude higher than those of previously reported *** virtue of several in situ spectroscopic techniques,it is established that the generated Au^(δ-)and O^-species together polarized the C-H bond,while the Au^(δ-)and O^-species jointly stabilized the CH_(3) intermediates,which favored the coupling of CH_(3) intermediate to photosynthesize C_(2)H_(6) instead of overoxidation into CO_(x).Thus,the design of dual active species is beneficial for achieving high-efficient CH_(4)-to-C_(2)H_(6) photoconversion.

关键词： dual surface-active sites selective methane coupling ethane room temperature

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互联网发展、交通运输及进口贸易关系研究——基于中国省际面板数据空间计量分析

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经济问题 2016年第6期 95-100页

作者：杨恺钧褚天威河海大学商学院江苏南京211100

基于中国30省份2002-2014年的面板数据,以新国际贸易理论为基础,将"冰山型成本"纳入到理论框架中,对互联网发展及交通运输对进口贸易的影响进行了机制分析,并采用空间计量研究方法对影响的直接效应和间接效应进行估计。估计结果显示,互... 详细信息

基于中国30省份2002-2014年的面板数据,以新国际贸易理论为基础,将"冰山型成本"纳入到理论框架中,对互联网发展及交通运输对进口贸易的影响进行了机制分析,并采用空间计量研究方法对影响的直接效应和间接效应进行估计。估计结果显示,互联网发展对当地进口贸易有显著抑制作用,但对周边区域的进口贸易有促进作用;交通运输对当地及周边区域的进口贸易都有促进作用。

关键词：互联网发展交通运输进口贸易空间杜宾模型

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Multi-stimuli-responsive aggregation-induced emission copper iodide cluster

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Science China Chemistry 2024年第4期67卷 1193-1197页

作者： Bo Li Yuan-Yuan Liu Peng Luo Ye-Ru Liu Ying-jun Chen kai Li Shuang-Quan Zang College of Chemistry and Pharmacy Engineering Nanyang Normal UniversityNanyang 473061China Green Catalysis Center and College of Chemistry Zhengzhou UniversityZhengzhou 450001China

Stimuli-responsive luminescent materials have attracted significant attention in the development of smart photoactive materials for both fundamental research and technological *** this work,a new copper iodide cluster(1)with aggregationinduced emission(AIE)characteristic,was obtained combining Cu_(4)I_(4) core with rhodamine B derivative ligand.1 has reversible and distinct multi-stimuli-responsive luminescence for external temperature,volatile organic compound,and mechanical ***,1 exhibited unusual large blue shift(84 nm)after being ground,which originated from the change of intermolecular ***,1 exhibits high oxygen quenching efficiency for 82.2% at 1 *** studies showed that the multi-stimuli-responsive luminescence properties of 1 can be attributed to the regulation of cluster-centered luminescence process,metal-to-ligand charge transfer process,halide-to-metal charge transfer luminescence process and aggregationinduced barrier to oxygen *** work not only reports an AIE copper iodide cluster,but also provides a new strategy to develop multi-stimuli-responsive luminescence materials.

关键词： copper iodide cluster aggregation-induced emission multi-stimuli-response

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金融发展、技术进步与区域内就业结构变迁——基于我国东部地区省级面板数据的实证研究

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经济经纬 2015年第1期32卷 19-24页

作者：杨恺钧潘娟王舒河海大学商学院江苏南京211100 中国人民银行盐城市中心支行江苏盐城224000

笔者基于1996年~2011年度我国东部地区11个省份的面板数据,构建面板模型探讨了东部地区各省市金融发展、技术进步对就业结构的影响。研究发现,金融发展规模对第一、第二产业就业起着抑制作用,对第三产业就业起着促进作用,而金融效率对... 详细信息

笔者基于1996年~2011年度我国东部地区11个省份的面板数据,构建面板模型探讨了东部地区各省市金融发展、技术进步对就业结构的影响。研究发现,金融发展规模对第一、第二产业就业起着抑制作用,对第三产业就业起着促进作用,而金融效率对我国三次产业的就业均起着正向促进效应。技术进步对第一产业就业呈现负向作用,对第二、第三产业的就业具有正向解释力,并且金融发展、技术进步对于各省市之间就业结构影响存在差异。

关键词：金融发展技术进步就业结构

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Potential plausible role of Wharton’s jelly mesenchymal stem cells for diabetic bone regeneration

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World Journal of Stem Cells 2024年第8期16卷 824-826页

作者： Sheng Zheng Guan-Yu Hu jun-Hua Li Yi-kai Li Department of Traditional Chinese Orthopedics and Traumatology Center for Orthopedic SurgeryThe Third Affiliated Hospital of Southern Medical UniversityGuangzhou 510630Guangdong ProvinceChina School of Traditional Chinese Medicine Southern Medical UniversityGuangzhou 510515Guangdong ProvinceChina

This letter addresses the review titled“Wharton’s jelly mesenchymal stem cells:Future regenerative medicine for clinical applications in mitigation of radiation injury”.The review highlights the regenerative potential of Wharton’s jelly mesenchymal stem cells(WJ-MSCs)and describes why WJ-MSCs will become one of the most probable stem cells for future regenerative *** potential plausible role of WJ-MSCs for diabetic bone regeneration should be noticeable,which will provide a new strategy for improving bone regeneration under diabetic conditions.

关键词： Wharton’s jelly mesenchymal stem cells Vascular endothelial growth factor Osteogenesis Angiogenesis Diabetic bone regeneration

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Assessment of perianal fistulizing Crohn’s disease activity with endoanal ultrasound: A retrospective cohort study

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World Journal of Gastrointestinal Surgery 2024年第8期16卷 2494-2502页

作者： Na Hong Wei-Yong Liu Jin-Long Zhang kai Qian Jie Liu Xian-jun Ye Fei-Yan Zeng Yue Yu kai-Guang Zhang Cheeloo College of Medicine Shandong UniversityJinan 250012ShandongChina Department of Gastroenterology The First Affiliated Hospital of University of Science and Technology of ChinaHefei 230001Anhui ProvinceChina Division of Life Sciences and Medicine University of Science and Technology of ChinaHefei 230001Anhui ProvinceChina Department of Ultrasound Medicine The First Affiliated Hospital of University of Science and Technology of ChinaHefei 230001Anhui ProvinceChina Department of Rehabilitation Medicine West China HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina Department of Radiology The First Affiliated Hospital of University of Science and Technology of ChinaHefei 230001Anhui ProvinceChina

BACKGROUND Perianal fistulas pose dual challenges to Crohn's disease(CD)*** patient compliance due to the complexity of existing examination methods plagues the treatment and follow-up management of perianal *** To determine the accuracy of endoanal ultrasound(EUS)and shear wave elastography(SWE)for evaluating perianal fistulizing CD(PFCD)*** This was a retrospective cohort study.A total of 67 patients from August 2022 to December 2023 diagnosed with CD were divided into three groups:Non-anal fistula group(n=23),low-activity perianal fistulas[n=19,perianal disease activity index(PDAI)≤4],high-activity perianal fistulas(n=25,PDAI>4)based on the *** patients underwent assessments including EUS+SWE,pelvic magnetic resonance[pelvic magnetic resonance imaging(MRI)],C-reactive protein,fecal calprotectin,CD activity index,*** The percentage of fistulas indicated by pelvic MRI and EUS was consistent at 82%,and there was good consistency in the classification of perianal fistulas(Kappa=0.752,P<0.001).Significant differences were observed in the blood flow Limberg score(χ2=8.903,P<0.05)and shear wave velocity(t=2.467,P<0.05)between group 2 and *** wave velocity showed a strong negative correlation with magnetic resonance novel index for fistula imaging in CD(Magnifi-CD)score(r=-0.676,P<0.001),a weak negative correlation with the PDAI score(r=-0.386,P<0.05),and a weak correlation between the Limberg score and the PDAI score(r=0.368,P<0.05).CONCLUSION EUS combined with SWE offers a superior method for detecting and quantitating the activity of perianal fistulas in CD *** may be the ideal tool to assess PFCD activity objectively for management strategies.

关键词： Endoanal ultrasound Shear wave elastography Perianal fistulizing Crohn’s disease Perianal disease activity index

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基于改进HHT的地下洞室爆破地震波信号时频分析

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工程爆破 2023年第5期29卷 148-154页

作者：孙苗杨钧凯吴立湖北国土资源职业学院武汉430090 中国地质大学(武汉)岩土钻掘与防护教育部工程研究中心武汉430074 中国地质大学(武汉)工程学院武汉430074

为了找出适合非平稳爆破地震波信号的时频分析算法,进行了短时傅里叶变换(STFT)、连续小波变换(CWT)、离散小波变换(DWT)、希尔伯特-黄变换(HHT)和改进HHT的烟台某地下洞室爆破地震波监测信号时频分析对比研究。分析结果表明:STFT适合... 详细信息

为了找出适合非平稳爆破地震波信号的时频分析算法,进行了短时傅里叶变换(STFT)、连续小波变换(CWT)、离散小波变换(DWT)、希尔伯特-黄变换(HHT)和改进HHT的烟台某地下洞室爆破地震波监测信号时频分析对比研究。分析结果表明:STFT适合平稳信号时频分析,不适合爆破地震波这种非平稳、非线性的信号;CWT可得出特定尺度-位移平面下的小波系数,也引入了冗余成分,导致小波逆变换重构不唯一;DWT能在一定程度描述信号的局部特征,但过度依赖于小波基的选择;HHT依据信号本身的特性进行分解,时频分析结果具有自适应性,但爆破地震波信号多为含噪信号,噪声的存在导致经验模态分解(EMD)产生模态混淆的现象。同时EMD无法免除端点效应的影响,时频分析精度受损。针对以上问题,通过在补充集合经验模态分解(CEEMD)中添加端点处理程序,得到能够同时抑制模态混淆和端点发散的改进HHT算法。改进的HHT算法能够得到物理意义明确的IMF,是一种更优越的时频分析方法,可为地下洞室爆破提供参考。

关键词：爆破地震波时频分析模态分解函数

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Octopus-like DNA nanostructure coupled with graphene oxide enhanced fluorescence anisotropy for hepatitis B virus DNA detection

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Chinese Chemical Letters 2024年第6期35卷 531-535页

作者： Jia-Li Xie Tian-Jin Xie Yu-Jie Luo kai Mao Cheng-Zhi Huang Yuan-Fang Li Shu-jun Zhen Key Laboratory of Luminescence Analysis and Molecular Sensing(Southwest University) Ministry of EducationCollege of Chemistry and Chemical EngineeringSouthwest UniversityChongqing 400715China Key Laboratory of Luminescent and Real-Time Analytical Chemistry(Southwest University) Chongqing Science and Technology BureauCollege of Pharmaceutical SciencesSouthwest UniversityChongqing 400715China

Fluorescence Anisotropy(FA)is an effective biochemical detection method based on molecular *** oxide(GO)has been extensively used as an FA ***,the enhancement of FA by GO alone is limited and the strong scattering of GO will easily make the measurement of FA *** order to address these problems,an octopus-like DNA nanostructure(ODN)was designed and coupled with GO to enhance the FA together in this *** mimicking the multi-clawed structure of the octopus,the ODN can be adsorbed on GO tightly,which not only could improve the sensitivity because of the double FA enhancement abilities of GO and ODN,but also could improve the specificity due to the decrease of the nonspecific interaction in complex ***,ODN could maintain a certain distance between the fluorophore and GO to reduce the fluorescence quenching efficiency of GO,which could improve the *** method has been applied for the detection of hepatitis B virus DNA(HBV-DNA)in a range of 1-50 nmol/L and the limit of detection(LOD)was 330 pmol/*** addition,the proposed method has been successfully utilized to detect HBV-DNA in human serum,indicating that this method has a great practical application prospect.

关键词： Fluorescence anisotropy Graphene oxide(GO) Octopus-like DNA nanostructure HBV-DNA

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