检索结果-南通市图书馆

Nutrient coordination mechanism of tiger nut induced by rhizosphere soil nutrient variation in an arid area, China

在线全文

学校读者我要写书评

暂无评论

Journal of Arid Land 2023年第10期15卷 1216-1230页

作者： TAN Jin WU Xiuqin li yaning SHI Jieyu li Xu School of Soil and Water Conservation Beijing Forestry UniversityBeijing 100083China

Tiger nut is a bioenergy crop planted in arid areas of northern China to supply oil and adjust the planting ***,in the western region of Inner Mongolia Autonomous Region,China,less water resources have resulted in a scarcity of available farmland,which has posed a huge obstacle to planting tiger *** of tiger nut on marginal land can effectively solve this *** fully unlock the production potential of tiger nut on marginal land,it is crucial for managers to have comprehensive information on the adaptive mechanism and nutrient requirement of tiger nut in different growth *** study aims to explore these key information from the perspective of nutrient coordination strategy of tiger nut in different growth periods and their relationship with rhizosphere soil *** fertilization treatments including no fertilization(N:P(nitrogen:phosphorous)=0:0),traditional fertilization(N:P=15:15),and additional N fertilizer(N:P=60:15)were implemented on marginal land in the Dengkou *** and soil samples were collected in three growth periods,including stolon tillering period,tuber expanding period,and tuber mature *** no fertilization,there was a significant correlation between N and P contents of tiger nut roots and tubers and the same nutrients in the rhizosphere soil(Plization,there was a significant impact on the P content of tiger nut tubers(Plizer,the accumulation rate of N and P was faster in stolons than in tubers(Plimited availability of nutrients in the rhizosphere soil prompts tiger nut to increase the C:N ratio,improving N utilizat

关键词： tiger nut stoichiometry rhizosphere soil nitrogen addition marginal land

Ecotoxicological effects of polycyclic musks and cadmium on seed germination and seedling growth of wheat(Triticum aestivum)

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2010年第12期22卷 1966-1973页

作者： Cuihong Chen Qixing Zhou Yanyu Bao yaning li Ping Wang Key Laboratory of Pollution Processes and Environmental Criteria Ministry of Education/College of Environmental Science and Engineering Nankai University Tianjin 300071 China. Key Laboratory of Terrestrial Ecological Process Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110016 China

Single and joint toxic effects of polycyclic musks including 1,3,4,6,7,8-hexahydro-4,6,6,7,8,8-hexamethylcyclopenta[g]-2- benzopyran （HHCB） and 7-acetyl-1,1,3,4,4,6-hexamethyl-1,2,3,4-tetrahydronapthalene （AHTN） and cadmium （Cd） on seed germination and seedling growth of wheat （Triticum aestivum） were investigated. The results showed that the toxicity sequence of HHCB toxic to wheat seed germination and seedling growth was similar to that of AHTN, that is, germination rate 〉 shoot elongation 〉 root elongation, while the toxicity of Cd was in the sequence of root elongation 〉 shoot elongation 〉 germination rate, according to the LC50 and EC50 values. It is suggested that polycyclic musks and Cd had different toxicological mechanisms. Root and shoot elongation of wheat might be good bioindicators for the contamination of polycyclic musks and Cd in soil. The mixture of polycyclic musks and Cd had synergistic effects on T. aestivum according to the equi-toxic mixture approach when root elongation was selected as the toxicological endpoint. Thus, the joint toxicity of HHCB and Cd was significantly higher than the single toxicity of HHCB or Cd, which was also confirmed by the EC50mix value of the mixture （EC50mix = 0.530 TUrnix）. The EC50mix value of the mixture of AHTN and Cd was 0.614 TUmix, which indicated that the mixture toxicity was strengthened when AHTN coexisted with Cd.

关键词： ecotoxicology polycyclic musk emerging pollutant cadmium wheat (Triticum aestivum) joint toxic effect

Analysis on the change of water potential of Populus euphratica *** *** Jabl under different irrigation volumes in temperate desert zone

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2010年第10期55卷 965-972页

作者： FU AiHong CHEN yaning li WeiHong Key Laboratory of Oasis Ecology and Desert Environment Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences Urumqi 830011 China

The measurement of plant water potential is considered to be a direct approach to confirming the irrigation time in present irrigation *** this current study,two shelter forests species in the Junggar Basin (Central Asia),Populus euphratica and *** Jabl,were *** monitored leaf water potential (ψl),stem water potential (ψs) and soil water potential (ψsoil) under different irrigation *** characteristics of the variation in leaf and stem water potential (ψl and ψs) of *** and *** Jabl,as well as the impact of soil water potential (ψsoil) on the leaf and stem water potential (ψl and ψs) under different irrigation conditions were *** results showed the following.(1) With increased irrigation,the intensity of drought stress on *** and *** Jabl decreased.(2) The intensity of drought stress experienced was less for *** Jabl than for *** under the same irrigation conditions.(3) The more intense the drought,the less sensitive was *** Jabl,but the more sensitive was ***,and vice versa.(4) For the *** community the soil water potential (Ψsoil) at 60 cm depth responded to variation in irrigation more strongly than at 30 and 90 cm *** the *** Jabl community the soil water potential (ψsoil) in the shallow surface layer responded to irrigation variation more strongly than that in deep layers.(5) In the event of relatively sufficient soil water,predawn stem water potential (ψpds) of plant was a reasonable indicator reflecting soil water potential (ψsoil).(6) The water demand of *** and *** Jabl shelter forests can be met with different irrigation policies:large volume and less frequency for *** but small volume and more frequency for *** Jabl.

关键词：电位变化灌水量荒漠区胡杨作者温带

Effects of main components on energy output characteristics of thermobaric explosive——A case study of typical formulations

在线全文

学校读者我要写书评

暂无评论

Defence Technology（防务技术） 2024年第8期38卷 205-216页

作者： Yunfei Zhao yaning li Zhiwei Han Peng Bao Jingyan Wang Boliang Wang School of Chemistry&Chemical Engineering Nanjing University of Science and TechnologyNanjing210094China School of Safety Science&Engineering Nanjing University of Science and TechnologyNanjing210094China

As a kind of high-efficiency explosive with compound destructive capability, the energy output law of thermobaric explosives has been receiving great attention. In order to investigate the effects of main components on the explosive characteristics of thermobaric explosives, various high explosives and oxidants were selected to formulate five different types of thermobaric explosive. Then they were tested in both open space and closed space respectively. Pressure measurement system, high-speed camera,infrared thermal imager and multispectral temperature measurement system were used for pressure,temperature and fireball recording. The effects of different components on the explosive characteristics of thermobaric explosive were analyzed. The results showed that in open space, the overpressure is dominated by the high explosives content in the formulation. The addition of the oxidants will decrease the explosion overpressure but will increase the duration and overall brightness of the fireball. While in closed space, the quasi-static pressure formed after the explosion is positively correlated with the temperature and gas production. In addition, it was found that the differences in shell constraints can also alter the afterburning reaction of thermobaric explosives, thus affecting their energy output characteristics. PVC shell constraint obviously increases the overpressure and makes the fireball burn more violently.

关键词： Thermobaric explosives Components Overpressure Fireball Afterburning reaction

Climate change and hydrologic process response in the Tarim River Basin over the past 50 years

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2006年第A1期51卷 25-36页

作者： XU Changchun CHEN yaning li Weihong CHEN Yapeng Xinjiang Institute of Ecology and Geography Chinese Academy Of Sci ences Urumqi 830011 China

在在过去的 50 年的 Tarim 河盆的气候变化和水疗院逻辑过程反应是越来越多的研究人员的焦点“注意。在这篇论文，温度和降水时间系列被发现介绍单音补品的增加趋势 usingnonparametric 测试。显著地，重要的步在温度和降水时间系列变... 详细信息

在在过去的 50 年的 Tarim 河盆的气候变化和水疗院逻辑过程反应是越来越多的研究人员的焦点“注意。在这篇论文，温度和降水时间系列被发现介绍单音补品的增加趋势 usingnonparametric 测试。显著地，重要的步在温度和降水时间系列变化发生在 1986。由在源流和主流对比自然的水过程的趋势，我们发现它不是人为的活动引起了河的气候变化在 Tarim 的更低的活动范围枯竭了，植被堕落了河。灰色的关联分析的结果证明散布河的更高的纬度的流量更仔细与冬季雪袜子被联系，当更低的纬度的与夏天温度有关仔细是更多时。在源流的流量对降水更敏感，当那对蒸发在主流更敏感时。尽管有降水在过去的 50years 上增加了的事实，增加温度引起的强壮的蒸发削弱了流量到某程度。

关键词：气候变化水资源非参数检验水文过程响应灵敏度

Path Planning and Intelligent Scheduling of Multi-AGV Systems in Workshop 36

在线全文

学校读者我要写书评

暂无评论

Path Planning and Intelligent Scheduling of Multi-AGV System...

Enhanced population of excited single state strategy:Irradiation and ultrasound dual-response and host tumor-driven nanosensitizers construction in triple synergistic therapy

第36届中国控制会议

作者： Chengbao liu Jie Tan Hongsheng Zhao yaning li Xiwei Bai Institute of Automation Chinese Academy of Sciences University of Chinese Academy of Sciences

ISBN: (纸本)9781538629185

With the continuous development of intelligent logistics, the application of Automated Guided Vehicles（AGVs） increasingly becomes popular in many industrial fields. However, there are a series of problems in multi-AGV systems, such as resource allocation, conflict and deadlock. It is difficult to plan the shortest path for each AGV without conflict and collision in multi-AGV systems. In this paper, a multi-AGV scheduling system in workshop is established by using the unidirectional directed graph method and the A* algorithm for path planning of AGVs. In addition, the system is realized by programming and a simulation experiment of 20 AGVs is set up. Finally, the simulation results show that the system can effectively solve the conflict problem of AGVs, and is stable and high real-time. The system is easily extended to their similar multi-AGV scheduling systems, and has a great application value.

关键词： Automated Guided Vehicle Path Planning Scheduling

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Nano Research 2024年第6期17卷 5501-5511页

作者： yaning li Mengyan Tian Tianyue Yang Jiayu Cao Hongli Chen Jun Guo Pai liu Yi liu State Key Laboratory of Separation Membranes and Membrane Processes School of Materials Science and EngineeringTiangong UniversityTianjin 300387China State Key Laboratory of Separation Membranes and Membrane Processes School of ChemistryTiangong UniversityTianjin 300387China State Key Laboratory of Separation Membranes and Membrane Processes School of Life ScienceTiangong UniversityTianjin 300387China State Key Laboratory of Separation Membrane and Membrane Process&Tianjin Key Laboratory of Green Chemical Technology and Process Engineering School of ChemistryTiangong UniversityTianjin 300387China School of Chemical and Environmental Engineering Wuhan Polytechnic UniversityWuhan 430023China Cangzhou Institute of Tiangong University Cangzhou 061000China

Phototheranostics is an emerging field in synergistic antitumor therapy in which irradiation and sensitizers are combined to produce reactive oxygen species(ROS),bio-images,and high *** of these are arrived from the energy of sensitizers,which located in excited single state(S_(1)).Undeniably,the decentralization of the S_(1)population indirectly decreases the effect of each individual *** this study,a strategy was proposed for enhancing the S_(1)population,and a sensitizer with mitochondrial targeting property,1,4-indolyl iodinated pyrrolo[3,2-b]pyrrole derivative(2I-TPIS),was assembled into adenosine triphosphate(ATP)-responsive nanoparticles(DPA-2I NPs)to achieve dual responses to irradiation and ultrasonication(US)for application to photo-sonodynamic therapy(PSDT).Compared with monotherapies,2I-TPIS generated more ROS in PSDT,inducing mitochondrial autophagy and apoptosis,which in turn triggered immunogenic cell death(ICD).Subsequently,DPA-2I NPs were constructed and self-assembled with the chemotherapeutic agents DPA-Cd and 2I-TPIS to achieve a triple synergistic strategy involving chemotherapy(CT)and ***-2I NPs exhibited absolute sensitization,intra-tumoral overexpression of ATP,and ***,the biosafety and potent antitumor efficiency of the DPA-2I NP-based“PSDT+CT”therapy were revealed using a 4T1 tumor *** study results provide insights into the design of sensitizers possessing a sufficient S_(1)population and a highly efficient tumor ablation capacity derived from molecular structural modulation,further enabling triple synergistic antitumor therapies,and expanding the clinical application of sensitizers.

关键词： triphosphate(ATP)-activated nano-sensitizers photo-sonodynamic therapy aggregation-induced emission enhanced excited state population

Ecological water demand of natural vegetation in the lower Tarim River

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Geographical Sciences 2010年第2期20卷 261-272页

作者： YE Zhaoxia CHEN yaning li Weihong Key Laboratory of Oasis Ecology and Desert Environment Xinjiang Institute of Ecology and Geography CASUrumqi 830011 China

We have appraised the relationships between soil moisture, groundwater depth, and plant species diversity in the lower reaches of the Tarim River in western China, by analyzing field data from 25 monitoring wells across eight study sites and 25 permanent vegetation survey plots. It is noted that groundwater depth, soil moisture and plant species diversity are closely related. It has been proven that the critical phreatic water depth is five meters in the lower reaches of the Tarim River. We acquired the mean phreatic evaporation of different groundwater levels every month by averaging the two results of phreatic evaporation using the Qunk and Averyanov formulas. Based on different vegetation types and acreage with different groundwater depth, the total ecological water demand （EWD） of natural vegetation in 2005 was 2.4×10^8 m^3 in the lower reaches of the Tarim River. Analyzing the monthly EWD, we found that the EWD in the growth season （from April to September） is 81% of the year＇s total EWD. The EWD in May, June and July was 47% of the year＇s total EWD, which indicates the best time for dispensing artificial water. This research aims at realizing the sustainable development of water resources and provides a scientific basis for water resource management and sound collocation of the Tarim River Basin.

关键词： ecological water demand natural vegetation eco-hydrological processes Tarim River

Ecological and environmental explanation of microbiotic crusts on sand dune scales in the Gurbantonggut Desert, Xinjiang

在线全文

学校读者我要写书评

暂无评论

Progress in Natural Science:Materials International 2005年第12期15卷 1089-1095页

作者： CHEN yaning,li Weihong,ZHOU Zhibing and liU Jiazhen Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Urumqi 830011,China Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences Urumqi 830011 China

Results obtained from the field investigation and the analysis in laboratory show that many species of microbiotic crusts of lichens,mosses and algae develop extensively in the Gurbantonggut Desert,*** formation,species and distribution are closely related to the environmental conditions at the different positions of sand *** animalcule crusts develop mainly on the mobile or semi-mobile sand surface of dune tops,the alga crusts develop mainly at the upper to middle parts of dune slopes,the lichen crusts develop at middle and lower parts of dune slopes,and the moss crusts are mainly distributed at the lower part of dune slopes and the interdune *** species,thickness and developing degree of microbiotic crusts increase from the upper part to the middle and lower parts of dune slopes and the interdune lowlands,and an obvious contrast between the microbiotic crusts and the different species of plant communities *** development and differentiation of microbiotic crusts at the different positions of dunes are the ecological appearance and the natural selection of synthetic adaptability of the different microbiotic crust species to the local environmental conditions,and are closely related to the ecological conditions,such as the physiochemical properties of soils and stability of topsoil texture.

关键词： microbiotic crust sand done scales environmental explanation the Gurbantonggut Desert