检索结果-南通市图书馆

Effects of phase change material(PCM)-based nanocomposite additives on thermal decomposition and burning characteristic of high energy propellants containing RDX

引用

Defence Technology（防务技术） 2022年第4期18卷 557-566页

作者： en-fa Fu Na Sun Zheng-gang Xiao Key Laboratory of Special energy Materials Ministry of Education School of Chemical Engineering Nanjing University of Science and Technology

A kind of phase change material(PCM)-based nanocomposite was prepared and added into high energy propellants containing RDX as additives to investigate its effect on thermal decomposition and burning characteristic of high energy *** effect of PCM-based nanocomposites on thermal decomposition of high energy propellants is investigated by TG/DSC-FTIR-MS *** to the delayed protection effect(PCM-based nanocomposites can absorb lots of heat at the range of certain temperature when it undergoes structure change or phase transitions)of PCM-based nanocomposites under the thermal decomposition condition,the thermal stability of high energy propellants modified with PCMbased nanocomposites is *** the same time,the concentration of N2,NO2,H2O and CO_(2)is increased during thermal decomposition of high energy propellants whereas NO and CO is *** burning gaseous products and burning characteristic of high energy propellants are studied by the combination of closed bomb test and Fourier transform infrared *** main burning gaseous products are N2,CO_(2),CO,H2O,CH4,*** the high energy propellant modified with PCM-based nanocomposites,the concentration of CH4is increased while CO,CO_(2) and H2O is decreased under the high-pressure burning *** progressivity factor of high energy propellants is increased by22.2%compared with the control sample while the maximum pressure is merely decreased 1.25%after the addition of the PCM-based nanocomposite,thus PCM-based nanocomposites can be used to adjust the burning process and improve the burning progressivity of high energy *** study is expected to boost the practical application of PCM-based nanocomposite to the propellant formulation and effectively control the burning characteristic of high energy propellants.

关键词： Phase change material Propellants Nanocomposite Thermal decomposition Burning

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

Controlling Spatiotemporal Chaos in Coupled Map Lattices to Periodic Orbits

引用

Communications in Theoretical Physics 2003年第5X期40卷 527-532页

作者： ZHUKai-en CHenTian-Lun BIANGuo-Xing InstituteofPhysics NankaiUniversityTianjin300071China

Two methods are presented for controlling spatiotemporal chaotic motion in coupled map lattices to a kind of periodic orbit where the dynamicM variables of all lattice sites are equM and act periodically as time evolves. Stability analysis of the periodic orbits is presented. We prove that especially the second controlling method can stabilize all the periodic orbits we concern. Basin of attraction and noise problem are discussed.

关键词：耦合图格子时空混沌混沌控制周期轨道稳定性分析

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

enhanced fat degradation following the addition of a Pseudomonas species to a bioaugmentation product used in grease traps

引用

Journal of environmental Sciences 2019年第3期31卷 174-188页

作者： Markella Tzirita Seraphim Papanikolaou bríd Quilty School of Biotechnology Dublin City University (DCU) Department of Food Science and Human Nutrition Agricultural University of Athens National Institute for Cellular Biotechnology (NICB) DCU

The presence of fats, oils and greases(FOGs) in wastewater can lead to many problems including blockages. Investigation of a bioaugmentation product, consisting of Bacillus spp., to degrade butter(1%, W/V) and olive oil(1%, V/V) was performed in aerobic batch cultures for 13-day incubation. Gravimetric analysis of the remaining substrates showed slowly degradation of the oil after a 2-day lag, but no degradation of the butter. Addition of a Pseudomonas putida strain CP1 to the Bacillus spp. population promoted rapidly degradation of both fats after7 days of incubation. High fat accumulation revealed the potential use of the new bacterial mixture for production of added-value compounds. Lipase production only by the Bacillus *** with the analysis of the remaining lipids with thin layer chromatography and gas chromatography, suggested that the Bacillus spp. mainly only hydrolyzed the fat. The breakdown products were metabolized by the Pseudomonas putida CP1 performing preferential utilization of unsaturated fatty acids. Investigation of population dynamics using selective plating and a labeled Pseudomonas putida CP1::Tn7-gfp showed domination of the latter. The new mixture performed a successful cooperation with good potential for FOG treatment and an aggregative response desirable to fat degradation in grease traps.

关键词： Bacillus Bioaugmentation Biodegradation FOG Lipase Pseudomonas

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

On the Random Conjugate Spaces of a Random Locally Convex Module

引用

Acta Mathematica Sinica,english Series 2012年第4期28卷 687-696页

作者： Tie Xin GUO Shi en ZHAO LMIB and School of Mathematics and Systems Science Beihang University

Theoretically speaking, there are four kinds of possibilities to define the random conjugate space of a random locally convex module. The purpose of this paper is to prove that among the four kinds there are only two which are universally suitable for the current development of the theory of random conjugate spaces. In this process, we also obtain a somewhat surprising and crucial result： if the base （Ω,F, P） of a random normed module is nonatomic then the random normed module is a totally disconnected topological space when it is endowed with the locally L0-convex topology.

关键词： Random locally convex module (ε λ)-topology locally L0-convex topology random con-jugate space

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

Unconventional Hamilton-type variational principles for analytical mechanics

引用

Science China(Physics,Mechanics & Astronomy) 2007年第2期50卷 152-162页

作者： LUO en LIANG LiFu LI WeiHua Department of Applied Mechanics and engineering Sun Yat-sen UniversityGuangzhou 510275China Department of Aerospace engineering Harbin Engineering UniversityHarbin 150001China

According to the basic idea of classical yin-yang complementarity and modern dual-complementarity, in a simple and unified new way proposed by Luo, the un-conventional Hamilton-type variational principles of holonomic conservative system in analytical mechanics can be established systematically. This unconventional Hamilton-type variational principle can fully characterize the initial-value problem of analytical mechanics, so that it is an important innovation for the Hamilton-type variational principle. In this paper, an important integral relation is given, which can be considered as the expression of the generalized principle of virtual work for analytical mechanics in mechanics. Based on this relation, it is possible not only to obtain the principle of virtual work of holonomic conservative system in analytical mechanics, but also to derive systematically the complementary functionals for three-field and two-field unconventional variational principles, and the functional for the one-field one by the generalized Legendre transformation given in this paper. Further, with this new approach, the intrinsic relationship among various principles can be explained clearly. Meanwhile, the unconventional Hamilton-type variational principles of nonholonomic conservative system in analytical mechanics can also be established systematically in this paper.

关键词： analytical mechanics holonomic and nonholonomic systems unconventional Hamilton-type variational principle dual-complementarity initial-value problem restricted variation

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

AVDTC Numbers of Generalized Halin Graphs with Maximum Degree at Least 6

引用

Acta Mathematicae Applicatae Sinica 2008年第1期24卷 55-74页

作者： Xiang-en Chen Zhong-fu Zhang College of Mathematics and Information Science Northwest Normal University Lanzhou 730070 China Institute of Applied Mathematics Lanzhou Jiaotong University Lanzhou 730070 China

In a paper by Zhang and Chen et al.（see [11]）, a conjecture was made concerning the minimum number of colors Xat（G） required in a proper total-coloring of G so that any two adjacent vertices have different color sets, where the color set of a vertex v is the set composed of the color of v and the colors incident to v. We find the exact values of Xat（G） and thus verify the conjecture when G is a Generalized Halin graph with maximum degree at least 6, A generalized Halin graph is a 2-connected plane graph G such that removing all the edges of the boundary of the exterior face of G （the degrees of the vertices in the boundary of exterior face of G are all three） gives a tree.

关键词： Graph total coloring adjacent-vertex-distinguishing total coloring adjacent-vertex-distinguishing total chromatic number.

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

A new N* resonance as a hadronic molecular state

引用

Chinese Physics C 2009年第12期33卷 1312-1317页

作者： Daisuke Jido Yoshiko Kanada-en’yo Yukawa Institute for Theoretical Physics Kyoto University Kyoto 606-8502 Japan

We report our recent work on a hadronic molecule state of the KKN system with I =1/2 and jR = 1/2＋. We assume that the A（1405） resonance and the scalar mesons, f0（980）, ao（980）, are reproduced as quasi-bound states of KN and KK, respectively. Performing non-relativistic three-body calculations with a variational method for this system, we find a quasibound state of the KIlN system around 1910 MeV below the three-body breakup threshold. This state corresponds to a new baryon resonance of N＊ with JP ： 1/2＋. We find also that this resonance has the cluster structure of the two-body bound states keeping their properties as in the isolated two-particle systems. We also briefly discuss another hadronic molecular state composed by two K and one N, which corresponds to a resonance.

关键词： three-body bound state ∧(1405) resonance kaon-nucleon intera^tion variational calculation

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

Weighted Norm Inequalities with General Weights for the Commutator of Calderón

引用

Acta Mathematica Sinica,english Series 2013年第3期29卷 505-514页

作者： Guo en HU Yue Ping ZHU Department of Applied Mathematics Zhengzhou Information Science and Technology Institute School of Science Nantong University

In this paper, by a sharp function estimate and an idea of Lerner, the authors establish some weighted estimates for the m-multilinear integral operator which is bounded from L1 （Rn） ×..…… L1 （Rn） to L1/m,∞（Rn）, and the associated kernel K（x; yl,.. , Ym） enjoys a regularity on the variable x. As an application, weighted estimates with general weights are given for the commutator of CalderSn.

关键词： Approximation to the identity weighted norm inequality singular integral operator max-imal operator non-smooth kernel

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

Transformation, Deformation and Microstructure Characteristics of Ru_(50)Ta_(50) High Temperature Shape Memory Alloy

引用

Journal of Materials Science & Technology 2006年第5期22卷 634-638页

作者： Zhirong HE Fang WANG Jing＇en ZHOU Department of Materials Science and engineering Shaanxi University of Technology Hanzhong 723003 China Library Shaanxi University of Technology Hanzhong 723003 China School of Materials Science and engineering Xi＇an Jiaotong University Xi＇an 710049 China

The basic martensitic transformation （MT） properties of Ru50Ta50 alloy, i.e. MT temperature （MTT）, temperature hysteresis （△T）, and MT heat （△H） were investigated in this paper. The effects of heat treatment and thermal cycling on MT behavior of Ru50Ta50 alloy, the deformation and microstructure characteristics of Ru50Ta50 alloy were also studied for its engineering application as high temperature actuator/sensor materials by means of differential scanning calorimetry, X-ray diffraction, transmission electron microscope, optical microscope, and hardness test. The results showed that a two-stage reversible MT takes place in Ru50Ta50 alloy. The two-stage MT starting temperatures （Ms^1, Ms^2） and the temperature hysteresis （△T1, △T2） are 1047, 784 and 11, 14℃, respectively. No significant effect of aging treatment and thermal cycling on MTT and AT of Ru50Ta50 alloy were observed, but △H decreases slowly with increasing thermal cycles. The hardness and brittleness of Ru50Ta50 alloy are high. The deformation mode of RuTa alloys is twinning.

关键词： RuTa alloy Shape memory alloy Martensitic transformation Heat treatment Thermal cycle

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

On 1-rate and 2-rate multicast 3-stage Clos networks

引用

Applied Mathematics(A Journal of Chinese Universities) 2009年第2期24卷 151-156页

作者： DOU Wen-qing YAO en-yu Dept. of Math. Shanghai Second Polytechnic Univ. Shanghai 201209 China Dept. of Math. Zhejiang Univ. Zhejiang 310027 China

The 3-stage Clos network C（n, m, r） is considered as the most basic and popular multistage interconnection network which has been widely employed for data communications and parallel computing systems. Quite a lot of efforts has been put on the research of the 3- stage Clos network. Unfortunately, very little is known for the multirate multicast Clos network which is the most complicated case. Firstly a sufficient condition for 1-rate multicast networks to be SNB is given, from which a result for 2-rate multicast networks to be WSNB can easily be gotten. Furthermore, by using a reservation-scheme routing, more specific result for 2-rate multicast networks to be WSNB can be obtained for the case of one of them exceeding 1/2.

关键词： 3-stage Clos network multirate multicast network strictly nonblocking wide-sense nonblocking

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：