检索结果-南通市图书馆

insensitive energetic microspheres DAAF/RDX fabricated by facile molecular self-assembly

在线全文

学校读者我要写书评

暂无评论

Defence Technology（防务技术） 2021年第5期17卷 1775-1781页

作者： Shu-jie Liu Bi-dong Wu Jia-ni Xie Zhi-min Li Chong-wei An Jing-yu Wang Xiao-dong Li School of Environment and Safety Engineering North University of ChinaShanxi030051China State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing100081China

insensitive energetic materials are promising in the defense weapons ***,energetic materials still suffer from great challenges and the concern about their safety limits their *** this work,insensitive energetic explosive 3,30-diamino-4,40-azoxyfurazan/hexahydro-1,3,5-trinitro-1,3,5-triazine(DAAF/RDX)microspheres were fabricated by self-assembly ***-like DAAF/RDX was prepared by mechanical ball milling for ***/RDX composites with different mass ratios(90:10,80:20,and 70:30)were *** morphologies and structures of as-obtained DAAF/RDX composites were characterized by scanning electron microscopy(SEM),powder x-ray diffraction(PXRD)and fourier transform infrared spectroscopy(FT-IR).The results showed that DAAF/RDX microspheres exhibited regular shaped microspheres with sizes from 0.5 to 1.2 *** was no crystal transition during the modification *** thermal properties of as-obtained materials were then evaluated by differential scanning calorimetry(DSC)and materials studio ***/RDX microspheres showed an advanced decomposition peak temperature compared with rod-like DAAF/*** binding energy and peak temperature values at zeroβ_(i)(T_(P0))of DAAF/RDX(90:10)increased by 36.77 kJ/mol,1.6℃,and 58.11 kJ/mol,12.3℃compared to DAAF/RDX(80:20)and DAAF/RDX(70:30),indicating the better thermal stability of DAAF/RDX(90:10).The characteristic drop height(H_(50))of DAAF/RDX(higher than 100 cm)composites was higher than that of raw RDX(25 cm),suggesting significant improvements in mechanical *** preparation of DAAF/RDX microspheres is promising for the desensitization of RDX and useful for the formation of other materials and future wide applications.

关键词： DAAF RDX insensitive Energetic microspheres Thermal stability

Facile Preparation of Polypeptides:Moisture insensitive and Superfast Ring Opening Polymerization of N-Carboxyanhydrides

在线全文

学校读者我要写书评

暂无评论

材料导报 2019年第1期33卷 1-2页

作者：栾世方 State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of Sciences

(a)NCA polymerization initiated by LiHMDS or other initiators in THF,initiator i)n-hexylamine,ii)HMDS,iii)bipyNi(COD);(b)LiHMDS-initiated open vessel polymerization of BLGNCA at 26 mg and 2 g scale;(c)GPC traces of poly-BLG at variable DP;(d)Reaction rates of LiHMDS and hexylamine initiated BLGNCA polymerization in THF with NCA:initiator ratio of 100∶1 and initial NCA concentration at 0.2 mol/L;(e)CD spectra of poly-BLG at variable DP prepared from LiHMDS-initiated NCA polymerization.

关键词： Facile preparation polypeptides:moisture insensitive

Polarization-insensitive interferometer based on a hybrid integrated planar light-wave circuit

在线全文

学校读者我要写书评

暂无评论

Photonics Research 2021年第11期9卷 2176-2181页

作者： GUO-WEI ZHANG YU-YANG DING WEI CHEN FANG-XIANG WANG PENG YE GUAN-ZHONG HUANG SHUANG WANG ZHEN-QIANG YIN JUN-MING AN GUANG-CAN GUO ZHENG-FU HAN CAS Key Laboratory of Quantum Information University of Science and Technology of ChinaHefei 230026China CAS Center for Excellence in Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei 230026China Hefei Guizhen Chip Technologies Co. Ltd.Hefei 230000China State Key Laboratory on Integrated Optoelectronics Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Interferometers are essential elements in classical and quantum optical *** strictly required stability when extracting the phase of photons is vulnerable to polarization variation and phase shift induced by environment ***,we implement polarization-insensitive interferometers by combining silica planar light-wave circuit chips and Faraday rotator *** asymmetric interferometers with temperature controllers are connected in series to evaluate the single-photon *** interference visibility over 12 h is above 99%,and the variations are less than 0.5%,even with active random polarization *** experiment results verify that the hybrid chip is available for high-demand applications like quantum key distribution and entanglement measurement.

关键词： planar insensitive quantum

Theoretical design of new bridge-ring insensitive high energy compounds by selected normal Diels-Alder reactions between NH_(2)-substituted oxazoles and NO_(2)/NF_(2)/NHNO_(2)-substituted ethylenes/acetylenes

在线全文

学校读者我要写书评

暂无评论

Defence Technology（防务技术） 2021年第5期17卷 1731-1739页

作者： Qiong Wu Qin-nan Hu Ming-quan Li Ze-wu Zhang Wei-hua Zhu Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology School of Materials Science and EngineeringNanjing Institute of Technology1 Hongjing RoadNanjing211167China Institute for Computation in Molecular and Materials Science and Department of Chemistry Nanjing University of Science and TechnologyNanjing210094China

In this work,NH_(2)-substituted oxazoles and NO_(2)/NF_(2)/NHNO_(2)-substituted ethylenes/acetylenes were designed and used as dienes and dienophiles,respectively,in order to develop new bridge-ring insensitive high energy compounds through the Diels-Alder reaction between *** reaction type,reaction feasibility and performance of reaction products were investigated in detail *** results showed that dienes most possibly react with dienophiles through the HOMO-diene controlled normal Diels-Alder reaction at relatively low energy *** could react with the designed dienes much more easily than other dienophiles,and was employed to further design 29 new bridge-ring energetic *** to high heat of formation,density and oxygen balance,all designed bridge-ring energetic compounds have outstanding detonation performance,16 of them have higher energy than HMX(1,3,5,7-tetranitro-1,3,5,7-tetrazocine)and 2 others even possess comparative energy with the representative of high energy compounds CL-20(2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane).The predicted average h50 value of these bridge-ring energetic compounds is 83 cm,showing their low impact *** NH2 groups could obviously impel the proceeding of Diels-Alder reactions,but would slightly decrease the energy and sensitivity *** all,the new designed bridge-ring compounds have both high energy and low sensitivity,and may be produced through Diels-Alder reactions at relatively low energy *** paper may be helpful for the theoretical design and experiment synthesis of new advanced insensitive high energy compounds.

关键词： Diels-Alder Energetic compounds Oxazole High energy insensitive

Detection of Graphene Cracks By Electromagnetic Induction,insensitive to Doping Level

在线全文

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & Sciences 2019年第8期120卷 351-361页

作者： Taeshik Yoon Sumin Kang Tae Yeob Kang Taek-Soo Kim Department of Mechanical Engineering KAISTDaejeon 34141Korea Graphene Research Center KAISTDaejeon 34141Korea

Detection of cracks is a great concern in production and operation processes of graphene based devices to ensure uniform ***,we show a detection method for graphene cracks by electromagnetic *** time varying magnetic field leads to induced voltage signals on graphene,and the signals are detected by a *** measured level of induced voltage is correlated with the number of cracks in graphene *** correlation is attributed to the increasing inductive characteristic of defective graphene,and it is verified by electromagnetic simulation and radio frequency ***,we demonstrate that the induced voltage signal is insensitive to the doping level of *** work can potentially lead to the development of a high-throughput and reliable crack inspection technique for mass production of graphene applications.

关键词： Graphene,crack detection inductance electromagnetic induction insensitive to doping

EFFECT OF METAL-COMPLEXING COMPOUNDS ON THE CYANIDE-insensitive RESPIRATION IN CORN MITOCHONDRIA

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

Chinese Science Bulletin 1981年第5期26卷 458-460页

作者：杨福愉邢菁如王淑娅 Institute of Biophysics Academia Sinica Institute of Biophysics Academia Sinican our previous paper we showed that a cyanideoresistant respiration was associated with mitochondrial preparations from corn seedlings. It was observed that the degree of sensitivity to cyanide was dependent upon the nature of substrates. The resistance of respiration to cyanide by isolated corn mitoehondria became higher in the

In our previous paper we showed that a cyanideoresistant respiration was associated with mitochondrial preparations from corn seedlings. It was observed that the degree of sensitivity to cyanide was dependent upon the... 详细信息

关键词： respiration preparations mitochondrial Pathway listed insensitive inhibited amate mannitol chelate

The Confinement Effect of Inert Materials on the Detonation of insensitive High Explosives

在线全文

学校读者我要写书评

暂无评论

World Journal of Mechanics 2018年第5期8卷 161-181页

作者： Ming Yu Institute of Applied Physics and Computational Mathematics Beijing China

The paper aims to theoretically and numerically investigate the confinement effect of inert materials on the detonation of insensitive high explosives. An improved shock polar theory based on the Zeldovich-von Neumann-Döring model of explosive detonation is established and can fully categorize the confinement interactions between insensitive high explosive and inert materials into six types for the inert materials with smaller sonic velocities than the Chapman-Jouguet velocity of explosive detonation. To confirm the theoretical categorization and obtain the flow details, a second-order, cell-centered Lagrangian hydrodynamic method based on the characteristic theory of the two-dimensional first-order hyperbolic partial differential equations with Ignition-Growth chemistry reaction law is proposed and can exactly numerically simulate the confinement interactions. The numerical result confirms the theoretical categorization and can further merge six types of interaction styles into five types for the inert materials with smaller sonic velocity, moreover, the numerical method can give a new type of interaction style existing a precursor wave in the confining inert material with a larger sonic velocity than the Chapman-Jouguet velocity of explosive detonation, in which a shock polar theory is invalid. The numerical method can also give the effect of inert materials on the edge angles of detonation wave front.

关键词： Detonation Confinement Effect insensitive High Explosives Shock Polar Theory Cell-Centered Lagrangian Method

Broadband and fabrication-tolerant 3-dB couplers with topological valley edge modes

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

Light(Science & Applications) 2024年第8期13卷 1623-1630页

作者： Guo-Jing Tang Xiao-Dong Chen Lu Sun Chao-Heng Guo Meng-Yu Li Zhong-Tao Tian Hou-Hong Chen Hong-Wei Wang Qi-Yao Sun Ying-Di Pan Xin-Tao He Yi-Kai Su Jian-Wen Dong School of Physics&State Key Laboratory of Optoelectronic Materials and Technologies Sun Yat-sen UniversityGuangzhou 510275China State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic EngineeringShanghai Jiao Tong UniversityShanghai 200240China

3-dB couplers,which are commonly used in photonic integrated circuits for on-chip information processing,precision measurement,and quantum computing,face challenges in achieving robust performance due to their limited 3-dB bandwidths and sensitivity to fabrication *** address this,we introduce topological physics to nanophotonics,developing a framework for topological 3-dB *** couplers exhibit broad working wavelength range and robustness against fabrication dimensional *** leveraging valley-Hall topology and mirror symmetry,the photonic-crystal-slab couplers achieve ideal 3-dB splitting characterized by a wavelength-insensitive scattering *** analysis confirms the superiority on broad bandwidth of 48 nm and robust splitting against dimensional errors of 20 *** further propose a topological interferometer for on-chip distance measurement,which also exhibits robustness against dimensional *** extension of topological principles to the fields of interferometers,may open up new possibilities for constructing robust wavelength division multiplexing,temperature-drift-insensitive sensing,and optical coherence tomography applications.

关键词： topological splitting insensitive

Parametric study of single confined fragment launch explosive device

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

Defence Technology（防务技术） 2019年第2期15卷 179-185页

作者： Pankaj K.Choudha A.Kumaraswamy Kusumkant D.Dhote Armament Research & Development Establishment (DRDO) Defence Institute of Advanced Technology

In this article, parametric study of single confined fragment launch device was carried out. The configuration proposed was further studied to derive the empirical relationship for effect of fragment size,charge size, confinement thickness on fragment velocity. The simulations were carried out using ANSYSAUTODYNE explicit solver. Fragment velocities were estimated as a function of different parametric combinations of explosive quantities, charge length to diameter ratio, fragment height to diameter ratio,confinement thickness, fragment material and fragment mass. The data was further converted to charge to metal ratio under fragment and confinement. It was observed that, increase in confinement thickness,charge quantity and decrease in fragment height increases the fragment velocity. It is also noted that,charge to metal mass ratio under fragment significantly affects the fragment velocity. At the end, an empirical relationship for fragment velocity interms of all these parameters was established. Using these relations, two velocities 1831.92 m/s and 2523.9 m/s required for NATO STANAG 4496 IM test were estimated. The design parameters for these velocities are presented. Also, the results estimated using the empirical relationship has been compared with published experimental data. Error in the predicted velocities is within the acceptable range. The empirical relationship proposed will be useful for finalization of design of the fragment launch device.

关键词： Confinement Fragment size Empirical relationship Fragment velocity insensitive munition test Fragment launching device