检索结果-南通市图书馆

Assessment of potential soybean cadmium excluder cultivars at different concentrations of Cd in soils

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2015年第9期27卷 108-114页

作者： Yang Zhi Kangxin He Ting Sun yongqiang zhu Qixing Zhou College of Sciences Northeastern University School of Medical Devices Shenyang Pharmaceutical University MOE Key Laboratory of Pollution Processes and Environmental Criteria Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation College of Environmental Science and Engineering Nankai University Techcomp Scientific Instrument Company Limited

The selection of cadmium-excluding cultivars has been used to minimize the transfer of cadmium into the human food chain. In this experiment, five Chinese soybean plants were grown in three soils with different concentrations of Cd（0.15, 0.75 and 1.12 mg/kg）.Variations in uptake, enrichment, and translocation of Cd among these soybean cultivars were studied. The results indicated that the concentration of Cd in seeds that grew at1.12 mg/kg Cd in soils exceeded the permitted maximum levels in soybeans. Therefore, our results indicated that even some soybean cultivars grown on soils with permitted levels of Cd might accumulate higher concentrations of Cd in seeds that are hazardous to human health. The seeds of these five cultivars were further assessed for interactions between Cd and other mineral nutrient elements such as Ca, Cu, Fe, Mg, Mn and Zn. High Cd concentration in soil was found to inhibit the uptake of Mn. Furthermore, Fe and Zn accumulations were found to be enhanced in the seeds of all of the five soybean cultivars in response to high Cd concentration. Cultivar Tiefeng 31 was found to fit the criteria for a Cd-excluding cultivar under different concentrations of Cd in soils.

关键词： Glycine max L. Cd-excluding cultivar Food safety Mineral nutrient element

Status of testing field for ocean energy generation

在线全文

学校读者我要写书评

暂无评论

Journal of Modern Power Systems and Clean Energy 2017年第2期5卷 160-168页

作者： yongqiang zhu Lihu JIA Chunming DUAN Xiaoyan SUN Wenrui GUO North China Electric Power University Beijing 102206China State Grid Jibei Electric Economic Research Institute Beijing 100045China

Ocean energy, considered as clean energy, is one kind of marine resources of great importance. Its development and utilization have become an indispensable part of national development strategy in China. Testingfields are required when conducting tests of ocean energy generation devices in real sea, which is the key step conducted before engineering prototypes transformed into scale industrialization applications. This paper introduces the construction and operation conditions of large-scale testing fields for wave energy and tidal current energy generation devices and presents a brief comparative analysis. Developing status and related technologies on testingfields for ocean energy power generation in China are also discussed. Furthermore, this paper investigates the necessity of grid-connected test for ocean energy generation and points out that the construction of ocean energy testingfields is helpful to ensure the efficient utilization of ocean energy resources.

关键词： Wave energy Tidal current energy Testing field Ocean energy generation

Analysis of the Transition Between Multiple Operational Modes for Hybrid AC/DC Microgrids

在线全文

学校读者我要写书评

暂无评论

CSEE Journal of Power and Energy Systems 2018年第1期4卷 49-57页

作者： Lihu Jia yongqiang zhu Shaofei Du Yinshun Wang State Key Laboratory of the Alternate Electrical Power System with Renewable Energy Sources North China Electric Power UniversityBeijing 102206China North China Electric Power University Beijing 102206China

There are four basic operational modes for the hybrid AC/DC microgrid,including AC grid-connected while interconnecting,both off-grid while interconnecting,AC gridconnected without connection,and both off-grid without connec*** to achieve a seamless operational mode transition is an urgent technical need to ***,this paper describes the typical structure of the hybrid microgrid,and places a detailed focus on the power balance and transition ***,it takes the master-slave control structure as an example,and designs the transition logic for different operational modes,and then a method for selecting the slack bus and transition time-sequence is *** on the different roles that the interlinking converter(IC)plays in the process of modes transition,a voltage-power(U-P)control method for a hybrid AC/DC microgrid is proposed,and the exchanged power is calculated based on the voltage deviation between the rating value and measured ***,a control flowchart for the transition between the four operational modes in transition is *** the PSCAD/EMTDC platform,this paper takes a typical seven-point microgrid structure as an example,the proposed transition strategy is carried out,and the results show that the transition method and time sequence can achieve smooth transition between different operational modes.

关键词： Hybrid AC/DC microgrid mode transition slack bus transition time-sequence voltage-power control

Performance evaluation of new epoxy resin-based composite phase change materials and their asphalt mixture

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 Traffic and Transportation Engineering(English Edition) 2024年第3期11卷 507-522页

作者： Yuchao Gao Jiao Jin Shuai Liu Yinfei Du Guoping Qian Jie Mao yongqiang zhu School of Traffic and Transportation Engineering Changsha University of Science and TechnologyChangsha 410114China School of Civil Engineering Central South UniversityChangsha 410075China Guangdong Guanyue Highway and Bridge Co. Ltd.Guangzhou 511452China

In recent years,the temperature-adjusted asphalt pavement has been an extensive concern by scholars in various countries,and this pavement can reduce temperaturerelated *** this study,the shaped composite phase change materials(CPCMs)were successfully synthesized by two processes,which are vacuum impregnation and epoxy ***,the applicability of CPCMs in asphalt mixtures was evaluated by microscopic characterization,chemical compatibility,thermal properties,durability,and leakage ***,CPCMs were applied to the asphalt mixture to evaluate its temperatureadjusted characteristics and pavement ***,the performance of the temperature-adjusted asphalt mixture was analyzed by integrating all *** research shows that the prepared CPCMs have excellent thermal properties and durability,the phase transition temperature is 48.93℃,and the phase transition enthalpy is 106.5 J/g,which fully meets the requirements for use in *** temperature-adjusted asphalt mixture could alleviate the occurrence of extreme temperature,which was 4.9℃lower than the conventional *** pavement performance of the temperatureadjusted asphalt mixture can meet the specified standards for humid *** the factors,the recommended amount of CPCMs is 1.5%.The research results provide a basis for the promotion of temperature-adjusted asphalt pavement and effectively support the development of pavement engineering technology.

关键词： Pavement engineering Temperature-adjusted asphalt mixture Phase change materials Thermal performance

Antitumor activity and low gastrointestinal toxicity of a novel selective inhibitor of nuclear export,SZJK-0421,in multiple myeloma

在线全文

学校读者我要写书评

暂无评论

Acta Pharmaceutica Sinica B 2024年第7期14卷 3281-3285页

作者： Jing Wang Hang Miao Xuxing Shen Lin Yang yongqiang zhu Lijuan Chen Department of Hematology Jiangsu Province Hospitalthe First Affiliated Hospital of Nanjing Medical UniversityNanjing 210029China College of Life Science Nanjing Normal UniversityNanjing 210037China Multi-component of Traditional Chinese Medicine and Microecology Researh Center Jiangsu Probince Academy of Traditional Chinese MedicineNanjing 210028China

To the Editor:Multiple myeloma(MM)is a plasma cell disease that remains *** anti-MMtherapies are currently in clinical research,including CAR-T therapy,bispecific antibodies,and XPO1 ***1 is a nuclear export protein that helps leucine-rich proteins transport from the nucleus to the ***1 is highly expressed in patients with MM and XPO1 overexpression is associated with short PFS and OS^(2).These observations suggest that XPO1 has considerable value as a therapeutic target for patients with MM.

关键词： Multiple myeloma Selective inhibitor Nuclear export Cytotoxicity Gastrointestinal toxicity

Significant sensing performance of an all-silicon terahertz metasurface chip for Bacillus thuringiensis Cry1Ac protein

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Photonics Research 2022年第3期10卷 740-746页

作者： Zijian Cui Yue Wang yongqiang Shi yongqiang zhu Dachi Zhang Zhiqi Hong Xuping Feng Key Laboratory of Ultrafast Photoelectric Technology and Terahertz Science in Shaanxi Xi’an University of TechnologyXi’an 710048China Key Laboratory of Engineering Dielectric and Its Application Ministry of EducationHarbin University of Science and TechnologyHarbin 150080China College of Biosystems Engineering and Food Science Zhejiang UniversityHangzhou 310058China

The promising prospect of a terahertz metasurface in sensing and detection applications has attracted increasing attention because of its ability to overcome the classical diffraction limit and the enhancement of field *** this work,a novel scheme based on an all-silicon terahertz plasmon metasurface is proposed and experimentally demonstrated to be a highly sensitive biosensor for the Bacillus thuringiensis Cry1Ac *** regression coefficients between Bacillus thuringiensis protein concentrations and the spectral resonance intensity and frequency were 0.8988 and 0.9238,*** resonance amplitude variation and frequency shift of the metasurface were investigated in terms of both thickness and permittivity change of the analyte,which reflected the protein residue in the actual ***,the reliability and stability of the metasurface chip were verified by time period,temperature,and humidity *** results promise the ability of the proposed metasurface chip as a Bacillus thuringiensis protein sensor with high sensitivity and *** addition,this novel device strategy provides opportunities for the advancement of terahertz functional applications in the fields of biochemical sensing and detection.

关键词： stability process overcome

On Optimization Principles of Power Systems with Distributed Generation

在线全文

学校读者我要写书评

暂无评论

On Optimization Principles of Power Systems with Distributed...

The Effectiveness Evaluation of Two Kinds of Fractal Sequences on Detrended Fluctuation Analysis

2010 3rd International Conference on Computer and Electrical Engineering(ICCEE 2010)

作者： Caihong Chen yongqiang zhu School of Electrical and Electronic Engineering North China Electric Power University

Electricity market restructuring, advances in energy generation technology and agreements on the reduction of greenhouse gas emissions have paved the way for an increase in the use of Distributed Generations (DGs). This work demonstrates a methodology for deploying DGs throughout a power system to allow for more efficient operation. Researchers at home and abroad have been studying on optimization of DGs and there are many methods and objectives proposed. The paper reviews and lists several common specific objectives and configuration. On the basis of summarizing all the optimization objectives, a reasonable optimization process is proposed and the key is to determine the optimal allocation of DGs by the use of "test factor". Finally, an example has proven that the principle is rational.

关键词： optimum allocation optimization process optimization objectives reliability power losses

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

数学计算（中英文版） 2014年第2期3卷 58-62页

作者： Danying Xie Li Wan yongqiang zhu School of Mathematics and information Science Guangzhou University Guangzhou 510006 China Key Laboratory of Mathematics and Interdisciplinary Sciences Guangzhou Higher Education Institutes Guangzhou UniversityGuangzhou 510006 China

Research Frontier of Street Spatial Form

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 Landscape Research 2021年第6期13卷 89-94,98页

作者： BAI Mei zhu yongqiang CHEN Jian WU Sihan School of Architecture and Art Hebei University of EngineeringHandanHebei 056038China

In order to comprehensively and objectively understand the research status of street form at home and abroad,WOS and CNKI database are as the source,and 176 street form papers retrieved from 2010 to 2021 are as samples to conduct statistical analysis of the *** main research hotspots are reviewed systematically,and the research trends in the field of planning and architecture are pointed *** hot topics of street form research in the past ten years are summarized,such as street spatial form characteristics,street form and thermal environment,air quality correlation,street form and walking,safety,vitality,health and other perceived *** research methods are summarized from two levels of street form data collection and ***,the current research trend characteristics and future trends are summarized and prospected to provide reference for the current research of street form.

关键词： Street form Open street view Micoclimate Walking Environmental behavior perception