检索结果-南通市图书馆

A theoretical method for solving shock relations coupled with chemical equilibrium and its applications

Chinese Journal of Aeronautics 2022年第6期35卷 47-62页

作者： Zijian zhang Chihyung WEN wenshuo zhang Yunfeng LIU Zonglin JIANG Department of Aeronautical and Aviation Engineering The Hong Kong Polytechnic UniversityHong KongChina Institute of Mechanics Chinese Academy of SciencesBeijing 100190China School of Engineering Science University of Chinese Academy of SciencesBeijing 100049China

In this study,a theoretical method is proposed to solve shock relations coupled with chemical *** only shock waves in dissociated flows but also detonation waves in combustive mixtures can be *** global iterative solving process is specially designed to mimic the physical and chemical process in reactive shock waves to ensure good stability and fast convergence in the proposed *** each global step,the single-variable equations of normal and oblique shock relations are derived and solved with the Newton iteration method to reduce the complexity of the problems,and the minimization of free energy method of NASA(National Aeronautics and Space Administration)is adopted to solve equilibrium *** is demonstrated that the convergent process is stable and very close to the real chemical-kinetic process,and high accuracy is achieved in the solutions of normal and oblique reactive shock ***,the proposed theoretical method has also been applied to many problems associated with reactive shocks,including the stability of oblique detonation wave,bow detonation over a sphere,and shock reflection in dissociated *** great importance of using chemical equilibrium to theoretically predict the theoretical range of the wedge angle for a standing oblique detonation wave(the standing window of the oblique detonation wave),the stand-off distance of bow detonation wave and the transition criterion of shock reflection in dissociated air with high accuracy have been addressed.

关键词： Chemical equilibrium Detonation Dissociated air Shock relation Theoretical solution

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Nitrogen and Phosphorus Pollutants Removal from Rice Field Drainage with Ecological Agriculture Ditch: A Field Case

引用

Phyton-International Journal of Experimental Botany 2022年第12期91卷 2827-2841页

作者： Lina Chen wenshuo zhang Junyi Tan Xiaohou Shao Yaliu Qiu Fangxiu zhang Xiang zhang College of Agricultural Engineering Hohai UniversityNanjing210098China Key Laboratory of Lower Yellow River Channel and Estuary Regulation Ministry of Water ResourcesZhengzhou450003China Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education College of EnvironmentHohai UniversityNanjing210098China College of Environment Hohai UniversityNanjing210098China Jiangsu Engineering Consulting Center Nanjing210000China Yellow River Institute of Hydraulic Research Zhengzhou450003China Gaochun Water Resources Management Center Nanjing211300China

Excessive nitrogen and phosphorus in agricultural drainage can cause a series of water environmental problems such as eutrophication of water bodies and non-point source *** monitoring the water purification effect of a paddy ditch wetland in Gaochun,Nanjing,Jiangsu Province,we investigated the spatial and temporal distribution patterns of N and P pollutants in paddy drains during the whole reproductive period of ***,the dynamic changes of nitrogen and phosphorus in time and space during the two processes of rainfall after basal fertilization and topdressing were analyzed after *** last,the effect of the ditch wetland on nutrient purification and treatment mechanism,along with changing flow and concentration in paddy drains,was *** results of this study showed that the concentrations of various nitrogen and phosphorus in the ditch basically reached the peak on the second and third days after the rainfall(5.98 mg/L for TN and 0.21 mg/L for TP),which provided a response time for effective control of nitrogen and phosphorus *** drainage can be purified by the ecological ditch,about 89.61%,89.03%,89.61%,98.14%,and 79.05%of TN,NH4+-N,NO3−-N,NO2−-N,and TP *** is more effective than natural ditches for water purification with 80.59%,40%,12.07%,91.06%and 18.42%removal rates,*** results of the study can provide a theoretical basis for controlling agricultural non-point source pollution and improving the water environment of rivers and lakes scientifically.

关键词： Paddy field ecological ditches nitrogen phosphorus

来源：

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

High-quality haplotype-resolved genome assembly of cultivated octoploid strawberry

引用

Horticulture Research 2023年第1期10卷 299-310页

作者： Jianxin Mao Yan Wang Baotian Wang Jiqi Li Chao zhang wenshuo zhang Xue Li Jie Li Junxiang zhang He Li Zhihong zhang Liaoning Key Laboratory of Strawberry Breeding and Cultivation College of HorticultureShenyang Agricultural University120 Dongling RoadShenyang 110866China Laboratory of Protected Horticulture(Shenyang Agricultural University) Ministry of EducationShenyang 110866China School of Information Science and Technology ShanghaiTech University393 Middle Huaxia RoadShanghai 201210China

Cultivated strawberry(Fragaria×ananassa),a perennial herb belonging to the family Rosaceae,is a complex octoploid with high heterozygosity at most ***,there is no research on the haplotype of the octoploid strawberry *** we aimed to obtain a high-quality genome of the cultivated strawberry cultivar,“Yanli”,using single molecule real-time sequencing and high-throughput chromosome conformation capture ***“Yanli”genome was 823 Mb in size,with a long terminal repeat assembly index of *** genome was phased into two haplotypes,Hap1(825 Mb with contig N50 of 26.70 Mb)and Hap2(808 Mb with contig N50 of 27.51 Mb).Using the combination of Hap1 and Hap2,we obtained for the first time a haplotype-resolved genome with 56 chromosomes for the cultivated octoploid *** identified a∼10 Mb inversion and translocation on chromosome 2-1.104957 and 102356 protein-coding genes were annotated in Hap1 and Hap2,*** of the genes related to the anthocyanin biosynthesis pathway revealed the structural diversity and complexity in the expression of the alleles in the octoploid F.×ananassa *** summary,we obtained a high-quality haplotype-resolved genome assembly of F.×ananassa,which will provide the foundation for investigating gene function and evolution of the genome of cultivated octoploid strawberry.

关键词： straw cultivar resolved

来源：

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

Interface sites on vanadia-based catalysts are highly active for NO_(x) removal under realistic conditions

引用

Journal of Environmental Sciences 2024年第2期136卷 523-536页

作者： Zhihui Lv Guangzhi He wenshuo zhang Jingjing Liu Zhihua Lian Yang Yang Zidi Yan Guangyan Xu Wenpo Shan Yunbo Yu Hong He State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China Center for Excellence in Regional Atmospheric Environment and Key Laboratory of Urban Pollutant Conversion Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China Ganjiang Innovation Academy Chinese Academy of SciencesGanzhou 341000China Ningbo Research Center for Urban Environment Chinese Academy of SciencesNingbo 315800China

TiO_(2)-supported V_(2)O_(5)catalysts are commonly used in NO_(x)reduction with ammonia due to their robust catalytic *** these catalysts,it is generally considered that the active species are mainly derived from the vanadia species rather than the intrinsic structure of V-O-Ti entities,namely the interface *** reveal the role of V-O-Ti entities in NH_(3)-SCR,herein,we prepared TiO_(2)/V_(2)O_(5)catalysts and demonstrated that V-O-Ti entities were more active for NO_(x)reduction under wet conditions than the V sites(V=O)working *** the V-O-Ti entities,kinetic measurements and first principles calculations revealed that NH_(3)activation exhibited a much lower energy barrier than that on V=O *** wet conditions,the V-O-Ti interface significantly inhibited the transformation of V=O to V-OH sites thus benefiting NH_(3)*** wet conditions,meanwhile,the migration of NH_(4)^(+)from Ti site neighboring the V-O-Ti interface to Ti site of the V-O-Ti interface was exothermic;thus,V-O-Ti entities together with neighboring Ti sites could serve as channels linking NH_(3)pool and active centers for activation of NH_(4)^(+).This finding reveals that the V-O-Ti interface sites on V-based catalysts play a crucial role in NO_(x)removal under realistic conditions,providing a new perspective on NH_(3)-SCR mechanism.

关键词： NO_(x)removal Vanadia-based catalysts V-O-Ti entities Interface sites Reaction mechanism

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

晚明坊刻戏曲与市民文化取向的转变

引用

中州学刊 2021年第3期 126-130页

作者：张文硕郑州大学历史学院郑州450001 河南工业大学建筑学院河南工业大学城市更新与遗产保护研究所

明代晚期,文化政策由早期的控制严格转向宽松,民间文学得到蓬勃发展。晚明坊刻戏曲有四个特征,即:内容以才子佳人为主、插图精致雅趣、评点增值文化内涵、图文精良体现文化遗产价值。晚明坊刻带动了市民文化向世俗化发展,形成了初期媒... 详细信息

明代晚期,文化政策由早期的控制严格转向宽松,民间文学得到蓬勃发展。晚明坊刻戏曲有四个特征,即:内容以才子佳人为主、插图精致雅趣、评点增值文化内涵、图文精良体现文化遗产价值。晚明坊刻带动了市民文化向世俗化发展,形成了初期媒介社会。明代坊刻,以图书形式流传下来的艺术风格和演唱技巧、表演形式对后世中国传统戏曲的传承弘扬具有深远影响,体现出其文化遗产保护方面的价值。

关键词：晚明坊刻戏曲市民文化文化遗产

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

试论东周时期的都城与同期希腊典型城市的规划布局

引用

中州学刊 2022年第9期 136-144页

作者：张文硕郑州大学历史学院历史文化遗产保护研究中心河南工业大学城市更新与遗产保护研究所河南郑州450001

东周是一个社会大变革的时代,处在同期的希腊城邦时代是其文明的鼎盛之时。在城市规划布局和建设上,东周的王城和主要诸侯国都城、希腊城邦的典型城市均具有鲜明的地方性和时代性,体现在城市选址的精要、王权和神权的交织、防御功能的... 详细信息

东周是一个社会大变革的时代,处在同期的希腊城邦时代是其文明的鼎盛之时。在城市规划布局和建设上,东周的王城和主要诸侯国都城、希腊城邦的典型城市均具有鲜明的地方性和时代性,体现在城市选址的精要、王权和神权的交织、防御功能的强化、功能区规划的完善实用等方面。双方处在相同的历史发展阶段,具备许多人类认知的相同相似之处,又因地域相隔遥远,经济、政治、文化、宗教背景及不同民族发展之间的差别等因素,在城市布局上显现出共性与差异并存、各自特征鲜明的特点。

关键词：东周时期希腊城市建设规划布局

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

1948年国立河南大学南迁苏州探析

引用

档案与建设 2021年第5期4卷 86-89页

作者：张文硕扬州大学社会发展学院江苏扬州225002

1948年开封战役爆发,处在战火中的国立河南大学因国民党军队的暴行,教学秩序被打乱,校园被摧毁,校内师生分裂,面临着严重的办学危机。为了维持正常的教学活动,校长姚从吾奉国民政府教育部命令,率校南迁苏州。结合当时的历史背景,河大遵... 详细信息

1948年开封战役爆发,处在战火中的国立河南大学因国民党军队的暴行,教学秩序被打乱,校园被摧毁,校内师生分裂,面临着严重的办学危机。为了维持正常的教学活动,校长姚从吾奉国民政府教育部命令,率校南迁苏州。结合当时的历史背景,河大遵从行政指令迁校,实属无奈之举。

关键词：国立河南大学南迁苏州

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Advanced Aramid Fibrous Materials:Fundamentals,Advances,and Beyond

引用

Advanced Fiber Materials 2024年第1期6卷 3-35页

作者： Annan He Tonghe Xing Zihui Liang Yuxin Luo Yu zhang Mengqi Wang Zhiyu Huang Jie Bai Liuyan Wu Zhicheng Shi Hongmei Zuo wenshuo zhang Fengxiang Chen Weilin Xu State Key Laboratory of New Textile Materials and Advanced Processing Technologies and Hubei Key Laboratory of Digital Textile Equipment Wuhan Textile UniversityWuhan 430200China College of Textiles and Clothing Qingdao UniversityQingdao 266071China China Textile Engineering Society Beijing 100025China School of Textile and Garment Anhui Polytechnic UniversityWuhu 241000China

Aramid fibers(AFs)are widely applied in many cutting-edge fields,due to their excellent comprehensive *** research efforts are therefore underway to expand the applicability by designing more environmentally friendly and low-cost synthesis methods,incorporating new chemical components in the skeletons or internal structures of polyamide to enhance their processability and *** being at the forefront of scientific research,there are fewer reviews that comprehensively summarize the latest progress of *** review focuses on the fundamental research of AFs since their inception and summarizes the advanced progress and applications of ***,the synthesis mechanism and methods of AFs and their structure-property relationship are comprehensively ***,we review the recent progress in surface functionalization of AFs by using advanced micro-nanoscale modification strategies to enhance the interface properties and ultraviolet(UV)-resistance properties,and summarize the advantages and disadvantages of various modified ***,applications of AF and aramid nanofiber(ANF)in various fields are ***,the possible challenges and outlooks toward the future development of AFs are highlighted,which is expected to provide new insights for the next-generation advanced functional AF materials and facilitate the industrialization development level for high-performance AFs and their composites.

关键词： Aramid fiber Surface functionalization Application Challenges and outlooks

来源：

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

提高高马赫数超燃冲压发动机推力的理论方法

引用

力学学报 2022年第3期54卷 633-643页

作者：韩信刘云峰张子健张文硕马凯夫中国科学院力学研究所高温气体动力学国家重点实验室北京100190 中国科学院大学工程科学学院北京100049 香港理工大学航空及民航工程学系中国香港九龙999077

斜爆轰发动机和激波诱导燃烧冲压发动机在高马赫数吸气式发动机中具有重要应用前景,但是斜爆轰发动机是否具有足够大的净推力,还是一个未知的问题,因此需要对高马赫数冲压发动机的推进性能以及提高推力的方法进行理论研究.本文主要分为... 详细信息

斜爆轰发动机和激波诱导燃烧冲压发动机在高马赫数吸气式发动机中具有重要应用前景,但是斜爆轰发动机是否具有足够大的净推力,还是一个未知的问题,因此需要对高马赫数冲压发动机的推进性能以及提高推力的方法进行理论研究.本文主要分为3部分.第1部分理论研究了超燃冲压发动机中的爆燃波和爆轰波的传播特性.保证发动机稳定燃烧是提高推力的前提.通过对爆燃波和爆轰波传播特性研究,得到了影响发动机燃烧稳定性的关键参数和物理规律.第2部分研究了发动机处于热壅塞临界状态下的燃烧规律和推力特性.在临界状态下,燃烧室入口气流速度正好等于爆轰波传播速度,二者处于平衡状态,这是发动机推进性能的理论上限.第3部分研究了提高高马赫数超燃冲压发动机推力的理论方法.对于高马赫数冲压发动机,燃烧室入口气流速度远远大于爆轰波的传播速度,这部分速度差就是提高推力的理论空间.对于马赫数Ma≥12的超燃冲压发动机,理论上燃烧产生的爆燃波或激波不会引起发动机不起动,因此可以通过进一步添加燃料和氧化剂的方法来提高其推力.理论分析结果表明,对于高马赫数超燃冲压发动机,不但燃烧流场是容易稳定的,而且可以有很多方法来进一步提高推力.

关键词：高马赫数超燃冲压发动机斜爆轰发动机激波诱导燃烧冲压发动机超声速燃烧提高推力的方法

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

一维与二维爆轰传播的时空关联特性数值研究

引用

力学学报 2021年第7期53卷 2069-2078页

作者：张文硕杨鹏飞姜宗林刘云峰中国科学院力学研究所高温气体动力学国家重点实验室北京100190 中国科学院大学工程科学学院北京100049

一维爆轰传播的理论完备、计算准确,二维斜爆轰传播由于壁面与黏性效应,大尺度、高精度预测还有一定难度.利用Euler方程和H2-Air基元反应模型,对二维有限长楔面诱导的斜爆轰和活塞驱动一维非定常正爆轰进行计算比较研究,从时空两个维度... 详细信息

一维爆轰传播的理论完备、计算准确,二维斜爆轰传播由于壁面与黏性效应,大尺度、高精度预测还有一定难度.利用Euler方程和H2-Air基元反应模型,对二维有限长楔面诱导的斜爆轰和活塞驱动一维非定常正爆轰进行计算比较研究,从时空两个维度方面,分析了两者在起爆过程、稀疏波传播、爆轰波面演化中的关联特性.研究结果表明:在过驱动度相同的条件下,经过时空变换的活塞驱动一维爆轰传播与二维驻定斜爆轰在起爆区波系结构、波面演化特征和主要参数分布规律方面无论定性或者定量对比均符合较好,所以,一维非定常爆轰和二维驻定斜爆轰具有时空相关性.两者的差异主要体现在过驱动斜爆轰受稀疏波影响过渡到近Chapman-Jouguet(C-J)爆轰状态所需的弛豫时间不同,原因可能是起源于活塞和壁面稀疏波强度的差异.本文提出的一维与二维爆轰传播的时空关联方法不仅有助于认知斜爆轰起爆、过驱爆轰产生、胞格爆轰演化的三阶段规律,还可以对比揭示壁面、边界层和黏性效应的影响,应用在斜爆轰发动机燃烧室设计中能够有效节约计算时间和成本,并降低复杂度.

关键词：斜爆轰活塞时空关联基元反应模型

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：