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Effect of Deficit Irrigation on the Growth, Water Use Characteristics and Yield of Cotton in Arid Northwest China

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Pedosphere 2015年第6期25卷 910-924页

作者： yang chuanjie LUO Yi SUN Lin WU Na Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of Sciences University of Chinese Academy of Sciences Farmland Irrigation Research Institute Chinese Academy of Agricultural Sciences

Water shortage is a key constraint to sustainable agricultural production in Xinjiang, Northwest China. To enhance the use efficiency of valuable irrigation water resources, a 2-year experiment(2010–2011) was conducted to quantify the response of cotton(Gossypium hirsutum L.) growth and yield to different degrees of deficit irrigation(DI) regimes; to determine the effects of DI on the characteristics of water use for cotton, seasonal water use, available soil water in the root zone, soil water depletion, evapotranspiration(ET)-based water use efficiency and irrigation-based water use efficiency, and to determine the best DI regime for optimal water-saving and yield output. The plots were irrigated at 100%(100ET), 85%(85ET), 70%(70ET), 55%(55ET) and 45%(45ET) of the regional ET of cotton in northern Xinjiang. The effect of DI irrigation on water use characteristics was evaluated by analyzing available soil water and soil water depletion in the root zone along with water use efficiencies of cotton. The study showed that the growth, water use characteristics and yield of cotton varied with irrigation regime. Seasonal ET and seed cotton yield were linearly correlated with irrigation amount. The second-order polynomial equation best approximated water-yield relationship of cotton in the study *** yield response factor was 0.65, suggesting limited water conditions were suitable for cotton cultivation. Economic evaluation of DI treatments confirmed that the yield loss was less than 10% under 70 ET and 85 ET, which was acceptable for greater *** results suggested that proper DI schemes were necessary for sustainable cotton production in the region. While irrigation at 85 ET was safe for high cotton yield, irrigation at 70 ET was a viable alternative under limited irrigation water availability.

关键词： available soil water evapotranspiration soil water dynamics water use efficiencies water-yield relationship

一种汽车撞击作用下桥上列车运行安全快速评估方法研究

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振动与冲击 2024年第15期43卷 51-55,62页

作者：崔堃鹏杨传杰韩玉婷宁占金杨日亮关岩鹏夏超逸中国消防救援学院北京102202 上海华测导航技术股份有限公司上海201703 北京交通大学土木建筑工程学院北京100044

针对跨线铁路桥梁遭遇汽车撞击后可能诱发的桥上列车运行安全问题,选取一座在役32 m跨度T形截面简支梁桥为工程背景,采用敲击试验和数值模拟相结合的方法,提出了一种基于传递函数的快速评估方法。该方法通过力锤敲击试验,采集敲击力时... 详细信息

针对跨线铁路桥梁遭遇汽车撞击后可能诱发的桥上列车运行安全问题,选取一座在役32 m跨度T形截面简支梁桥为工程背景,采用敲击试验和数值模拟相结合的方法,提出了一种基于传递函数的快速评估方法。该方法通过力锤敲击试验,采集敲击力时程和敲击作用下桥梁关键位置动力响应时程。将敲击力作为输入变量,以桥梁动力响应作为输出变量,求出桥梁结构的传递函数。将汽车撞击力时程进行快速傅里叶变换,与传递函数进行复数点乘,对其结果进行傅里叶逆变换,得到汽车撞击的桥梁动力响应时程。通过与有限元模型计算结果进行对比,验证了基于传递函数的快速计算方法的适用性。在工程领域内,该方法避免了大量重复性的有限元计算以及破坏性试验,可以快速推导出桥梁遭遇汽车撞击后动力响应,并实现对桥上列车运行安全的快速评估。

关键词：汽车撞击运行安全动力响应传递函数快速评估

Effects of Plant Community Type on Soil Methane Flux in Semiarid Loess Hilly Region,Central Gansu Province,China

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Advances in Atmospheric Sciences 2022年第8期39卷 1360-1374页

作者： chuanjie yang Guang LI Lijuan YAN Weiwei MA Jiangqi WU Yan TAN Shuainan LIU Shikang ZHANG College of Forestry Gansu Agricultural UniversityLanzhou 730070China Gansu Provincial Key Laboratory of Aridland Crop Science Lanzhou 730070China College of Agronomy Gansu Agricultural UniversityLanzhou 730070China

Methane(CH_(4))is an important greenhouse gas second only to CO_(2)in terms of its greenhouse *** plays an important role in controlling soil CH_(4)fluxes,but the spatial variability of soil CH_(4)fluxes during vegetation restoration in Loess Hilly Region(LHR)is not fully *** effects of different plant community types[Medicago sativa grassland(MS);Xanthoceras sorbifolium forestland(XS);Caragana korshinskii bushland(CK);Hippophae rhamnoides shrubland(HR);and Stipa bungeana grassland(SB)]on soil CH_(4)flux in LHR were studied via the static chamber *** results showed that the five plant community types were sinks of soil CH_(4)in LHR,the plant community type significantly affected the soil CH_(4)flux,and the average CH_(4)uptake from high to low was in SB,HR,CK,MS,and *** the whole study period,the soil CH_(4)flux showed similar interannual *** maximum absorption of soil CH_(4)appeared in the growing season,while the minimum appeared in *** CH_(4)uptake was positively correlated with soil temperature and soil *** temperature and moisture are important controlling factors for the temporal variability of soil CH_(4)*** LHR,the Stipa bungeana grassland is the more suitable plant community type for reducing soil CH_(4)*** the process of vegetation restoration in LHR,the soil CH_(4)absorption potential of different plant community types should be considered,ecological benefits should be taken into account,and vegetation more suitable for mitigating the greenhouse effect should be selected.

关键词： plant community type methane temporal variation Loess Hilly Region

高原两系杂交粳稻主要经济性状杂种优势和相关性分析

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杂交水稻 2024年第5期39卷 40-46页

作者：钏兴宽杨钏杰李国生尹鹏熙王锦艳康洪灿张义段浩平保山市农业科学研究所云南保山678000 保山市农业农村投资项目管理中心云南保山678000 保山市农业环境保护监测站云南保山678000

以3个两系粳稻不育系、5个恢复系及其配组的15个组合为研究材料,以滇Ⅰ型三系杂交粳稻新组合滇禾优203为对照,分析高原两系杂交粳稻组合主要经济性状的杂种优势表现、杂交组合主要经济性状间相关性以及杂交组合主要经济性状与亲本的相... 详细信息

以3个两系粳稻不育系、5个恢复系及其配组的15个组合为研究材料,以滇Ⅰ型三系杂交粳稻新组合滇禾优203为对照,分析高原两系杂交粳稻组合主要经济性状的杂种优势表现、杂交组合主要经济性状间相关性以及杂交组合主要经济性状与亲本的相关性。结果表明,高原两系杂交粳稻组合的产量和经济性状差异较大,与对照滇禾优203相比,高原两系杂交粳稻组合产量杂种优势有正有负,库容量全部表现为负值,有效穗数、结实率表现正向优势,每穗总粒数、每穗实粒数和千粒重表现为负向优势。高原两系杂交粳稻组合产量与有效穗数、库容量呈显著正相关;有效穗数与每穗总粒数、每穗实粒数呈极显著负相关,与千粒重呈显著负相关;组合的株高、穗长与父本及父母本的交互效应呈极显著正相关,在株高上无超亲现象;有效穗数与母本和父母本的交互效应呈极显著正相关;每穗总粒数与父本和父母本交互效应呈极显著正相关。初步确立了高原两系杂交粳稻以矮秆多穗不育系与高秆大穗恢复系配组为最佳方式,同时确立了多穗、中高秆、高结实、穗粒协调的高原两系杂交粳稻理想株型模式。

关键词：高原两系杂交粳稻经济性状杂种优势相关分析

Advances and outlook of integrated reservoir-wellbore-pipe network simulation technology

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Energy Geoscience

Energy Geoscience 2024年第4期5卷 1-7页

作者： Hongmin Yu Youqi Wang chuanjie Cheng Quanqi Dai Jingjing Sun Qingxin Zhang SINOPEC Petroleum Exploration and Production Research Institute Beijing102206China Research and Development Center for the Sustainable Development of Continental Sandstone Mature Oilfield National Energy AdministrationBeijing102206China

The integrated simulation and optimization technology of reservoir-wellbore-pipe network is developed to reflect the mutual influence and restriction among reservoir engineering,oil production engineering and surface engineering,and to obtain the scheme with minimum conflict and optimal benefit in each *** technology is based on the concept of global optimization to maximize production and profit,reduce costs and increase *** paper elaborates the current situation of integrated simulation technology of reservoir-wellbore-pipe network both at home and abroad,discusses its correlation with the primary business of Sinopec and its development from three aspects of modeling,cloud platform and *** on its future development are put forward from underlying data,software platform,popularization and application,and cross-border integration to provide means and guidance for the construction of intelligent oil and gas *** results show that the integrated simulation of reservoir-wellbore-pipe network can better reflect the optimization requirements of each step,avoid the ineffective operation of field equipment,and effectively improve the efficiency of research and *** solution,global optimization method and pressure fitting,which can make the simulation results reflect the real situation,are the key technologies for the *** theoretical technology and main function research of integrated simulation technology have been mature,but the large-scale application and local function improvement of oil and gas fields are yet to be *** the future,the integrated simulation of reservoir-wellbore-pipe network will develop from digitalization to modeling and intellectualization,from local simulation to cloud computing,and from manual intervention to intelligent *** suggest speeding up the construction of the unified database and model base of the whole underlying platform,strengthening the constr

关键词： Reservoir-wellbore-pipe network Integrated production modelling Prospect Development suggestion Simulation

Callovian-Oxfordian sedimentary microfacies in the middle of Block B on the right bank of the Amu Darya Basin,Turkmenistan

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Energy Geoscience

Energy Geoscience 2024年第2期5卷 249-262页

作者： Chongyang Wu chuanjie Cheng Liangjie Zhang Bingsong Yu Hongjun Wang Petroleum Exploration and Development Research Institute SinopecBeijing100083China China University of Geosciences(Beijing) Beijing100083China Research Institute of Petroleum Exploration and Development PetroChinaBeijing100083China

The right bank of the Amu Darya Basin enjoys abundant natural gas resources,on which the Callovian-Oxfordian strata in the middle of Block B serve as the major horizons for natural gas ***,the characteristics and distribution patterns of the sedimentary microfacies in these strata are yet to be further *** on the analysis of data on drilling,logging,cores,and thin sections from 29 typical wells,as well as the regional sedimentary background,this study inferred that the middle of Block B evolved from the Callovian ramp platform into the Oxfordian rimmed ***,this study determined that the inner-ramp intertidal-subtidal shallow-water subfacies mainly developed during the Callovian and transitioned into the shallow shelf subfacies during the *** study identified eight sedimentary microfacies,namely reef knoll,reef-shoal complex,bioclastic shoal,psammitic shoal,bioherm,lime mud mound,intershoal(intermound),and static-water *** on research into the high-precision sequence-sedimentary microfacies framework,this study built a geological model for the development of sedimentary microfacies in the study *** to this geological model,the sedimentary microfacies in the study area are characterized by vertical alternation of reef-shoal complex,bioclastic(psammitic)shoal,bioherm,and intershoal ***,they show the development of reef knoll,reef-shoal complex,bioclastic(psammitic)shoal,and bioherm(or lime mud mound)laterally from west to east,with the physical properties of the reservoirs deteriorating from west to east *** microfacies of reef-shoal complex and the bioclastic(psammitic)shoal predominate in the study area,and their deposition and development are controlled by sequence boundaries and are also affected by *** Oxfordian reef-shoal complexes were largely inherited from the Callovian uplifts and show lateral seaward progradation.

关键词： Carbonate rock Sedimentary microfacies Evolutionary pattern Jurassic Amu Darya Basin Turkmenistan

Drilling-based measuring method for the c-φ parameter of rock and its field application

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International Journal of Mining Science and Technology 2024年第1期34卷 65-76页

作者： Bei Jiang Fenglin Ma Qi Wang Hongke Gao Dahu Zhai Yusong Deng chuanjie Xu Liangdi Yao State Key Laboratory for Tunnel Engineering China University of Mining and Technology-BeijingBeijing 100083China State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing 100081China Research Center of Geotechnical and Structural Engineering Shandong UniversityJinan 250061China

The technology of drilling tests makes it possible to obtain the strength parameter of rock accurately in situ. In this paper, a new rock cutting analysis model that considers the influence of the rock crushing zone(RCZ) is built. The formula for an ultimate cutting force is established based on the limit equilibrium principle. The relationship between digital drilling parameters(DDP) and the c-φ parameter(DDP-cφ formula, where c refers to the cohesion and φ refers to the internal friction angle) is derived, and the response of drilling parameters and cutting ratio to the strength parameters is analyzed. The drillingbased measuring method for the c-φ parameter of rock is constructed. The laboratory verification test is then completed, and the difference in results between the drilling test and the compression test is less than 6%. On this basis, in-situ rock drilling tests in a traffic tunnel and a coal mine roadway are carried out, and the strength parameters of the surrounding rock are effectively tested. The average difference ratio of the results is less than 11%, which verifies the effectiveness of the proposed method for obtaining the strength parameters based on digital drilling. This study provides methodological support for field testing of rock strength parameters.

关键词： Digital drilling Rock crushing zone c-u parameter Measurement method Field application

Glacial debris flow susceptibility mapping based on combined models in the Parlung Tsangpo Basin,China

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Journal of Mountain Science 2024年第4期21卷 1231-1245页

作者： ZHOU Yonghao HU Xiewen XI chuanjie WEN Hong CAO Xichao JIN Tao ZHOU Ruichen ZHANG Yu GONG Xueqiang Faculty of Geosciences and Engineering Southwest Jiaotong UniversityChengdu 611756China School of Architecture and Civil Engineering Xihua UniversityChengdu 610039China

Machine learning(ML)-based prediction models for mapping hazard(e.g.,landslide and debris flow)susceptibility have been widely developed in recent ***,in some specific areas,ML models have limited application because of the uncertainties in identifying negative *** Parlung Tsangpo Basin exemplifies a region prone to recurrent glacial debris flows(GDFs)and is characterized by a prominent landform featuring deep *** the limitations of the ML model,we developed and compared two combined statistical models(FA-WE and FA-IC)based on factor analysis(FA),weight of evidence(WE),and the information content(IC)*** final GDF susceptibility maps were generated by selecting 8 most important static factors and considering the influence of *** results show that the FA-IC model has the best *** areas with a very high susceptibility to GDFs are primarily located in the narrow valley section upstream,on both sides of the valley in the middle and downstream of the Parlung Tsangpo River,and in the narrow valley section of each *** areas encompass 86 gullies and are characterized as"narrow and steep".

关键词： Parlung Tsangpo Basin Glacial debris flow Factor analysis Susceptibility mapping Weight of evidence Information content method.

Multichannel microneedle dry electrode patches for minimally invasive transdermal recording of electrophysiological signals

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Microsystems & Nanoengineering 2024年第3期10卷 119-136页

作者： Zhengjie Liu Xingyuan Xu Shuang Huang Xinshuo Huang Zhibo Liu chuanjie Yao Mengyi He Jiayi Chen Hui-jiuan Chen Jing Liu Xi Xie State Key Laboratory of Optoelectronic Materials and Technologies School of Electronics and Information TechnologyGuangdong Province Key Laboratory of Display Material and TechnologySun Yat-Sen UniversityGuangzhouChina School of Biomedical Engineering Sun Yat-Sen UniversityGuangzhouChina The First Affiliated Hospital of Sun Yat-Sen University GuangzhouChina

The collection of multiple-channel electrophysiological signals enables a comprehensive understanding of the spatial distribution and temporal features of electrophysiological *** approach can help to distinguish the traits and patterns of different ailments to enhance diagnostic *** array electrodes,which can penetrate skin without pain,can lessen the impedance between the electrodes and skin;however,current microneedle methods are limited to single channels and cannot achieve multichannel collection in small ***,a multichannel(32 channels)microneedle dry electrode patch device was developed via a dimensionality reduction fabrication and integration approach and supported by a self-developed circuit system to record weak electrophysiological signals,including electroencephalography(EEG),electrocardiogram(ECG),and electromyography(EMG)*** microneedles reduced the electrode–skin contact impedance by penetrating the nonconducting stratum corneum in a painless *** multichannel microneedle array(MMA)enabled painless transdermal recording of multichannel electrophysiological signals from the subcutaneous space,with high temporal and spatial resolution,reaching the level of a single microneedle in terms of signal *** MMA demonstrated the detection of the spatial distribution of ECG,EMG and EEG signals in live rabbit models,and the microneedle electrode(MNE)achieved better signal quality in the transcutaneous detection of EEG signals than did the conventional flat dry electrode *** work offers a promising opportunity to develop advanced tools for neural interface technology and electrophysiological recording.

关键词： needle rabbit electrode