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Stenting for intracranial stenosis:potential future for the prevention of disabling or fatal stroke

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Stroke & Vascular Neurology 2018年第3期3卷 140-146页

作者： Wengui Yu wei-jian jiang Department of Neurology University of CaliforniaIrvineCaliforniaUSA New Era Stroke Care and Research Institute The Rocket Force General HospitalBeijingChina

Intracranial stenosis is a common cause of ischaemic strokes,in particular,in the Asian,African and Hispanic *** randomised multicentre study Stenting and Aggressive Medical Management for the Prevention of Recurrent stroke in Intracranial Stenosis(SAMMPRIS)showed 14.7% risk of stroke or death in the stenting group versus 5.8% in the medical group at 30 days,and 23% in the stenting group versus 15% in the medical group at a median follow-up of 32.4 *** results demonstrated superiority of medical management over stenting and have almost put the intracranial stenting to rest in recent *** note,16 patients(7.1%)in the stenting group had disabling or fatal stroke within 30 days mostly due to periprocedural complications as compared with 4 patients(1.8%)in the medical *** contrast,5 patients(2.2%)in the stenting group and 14 patients(6.2%)in the medical group had a disabling or fatal stroke beyond 30 days,indicating significant benefit of stenting if periprocedural complications can be ***,the results of the Chinese Angioplasty and Stenting for Symptomatic Intracranial Severe Stenosis trial and the Wingspan Stent System Post Market Surveillance Study(WEAVE trial)showed 2%-2.7% periprocedural *** is time to evaluate the role of intracranial stenting for the prevention of disabling or fatal stroke.

关键词： prevention intracranial Stent

Improving the damage potential of W-Zr reactive structure material under extreme loading condition

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Defence Technology（防务技术） 2021年第2期17卷 467-477页

作者： Lu-yao Wang jian-wei jiang Mei Li jian-bing Men Shu-you Wang State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing 100081PR China

Projectiles made of reactive structure materials(RSM)can damage the target with not only kinetic but also chemical energy,but the enhanced damage potential of RSM may become compromised if extreme loading condition disintegrates the projectile before the target is *** this work,a ductile coating of Ni was introduced to a tungsten-zirconium(W-Zr)alloy,a typical brittle RSM,to preserve the damage potential of the *** driving tests were carried out with X-ray photography and gunpowder deflagration driving tests were carried out with high-speed photography for the coated and uncoated RSM samples,*** craters on the witness target were analyzed by scanning electron microscopy and X-ray *** Ni coating was found to effectively preserve the damage potential of the W-Zr alloy under extreme loading conditions,whereas the uncoated sample fractured and ignited before impacting the target in both detonation and deflagration *** crack propagation between the reactively brittle core and the ductile coating was analyzed based on the crack arrest theory to mechanistically demonstrate how the coating improves the structural integrity and preserves the damage potential of the ***,the Ni coating envelops theW-Zr core until the coated sphere penetrates the target,and the coating is then eroded and worn to release the reactive core for the projectile to damage the target more intensively.

关键词： Reactive structure material Extreme loading Structural integrity Damage potential

New anthraquinone derivatives from the roots of Berchemia floribunda

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Chinese Chemical Letters 2007年第4期18卷 412-414页

作者： Xin wei jian Shuang jiang Zi Ming Feng Pei Cheng Zhang Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine （Ministry of Education） Institute of Materia Medica Chinese Academy of Medical Sciences and Peking Union Medical College Beifing 100050 China

A new naphthoquinone-anthraquinone dimer named floribundiquinone E （1） and a new anthraquinone 2-acetylphyscion （2） were isolated from the roots of Berchemia floribunda Brongn. Their structures were elucidated on ... 详细信息

关键词： Berchemia floribunda Anthraquinone Floribundiquinone E 2-Acetylphyscion

Processing of a low-costγ-γ'NiPtAl coating with improved oxidation resistance

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Rare Metals 2024年第6期43卷 2832-2841页

作者： Yan jiang Liang-Liang wei jian He Hong-Bo Guo School of Materials Science and Engineering Beihang UniversityBeijing 100191China Key Laboratory of High-Temperature Structural Materials and Protective Coatings Ministry of Industry and Information TechnologyBeihang UniversityBeijing 100191China

A novelγ-γ'(Ni solid solution—Ni_(3)Al)NiPtAl coating was produced on advanced single-crystal(SC)superalloy N5 by electroplating of a thin Pt coating with~3μm in thickness followed by heat treatment at 1000℃in *** comparison,a traditionalγ-γ'NiPtAl coating was also produced by electroplating of a thick Pt coating with~6μm in thickness followed by heat treatment at 1100℃in *** novel coating has a mass gain of~0.5 mg·cm^(-2)after 100 h 1-h cyclic oxidation at 1150℃,showing better oxidation resistance than the traditional *** oxide scale mostly consisting ofα-Al_(2)O_(3)grew on the novel coating because the element Cr from the SC alloy substrate contributes to the formation ofα-Al_(2)O_(3).Pt content in the novel coating has significant effect on the oxidation *** optimized Pt content in the coating is about 16 at%,which is helpful to reduce the diffusion of harmful elements from the substrate into the coating but also to reduce the cost of the coating.

关键词： γ-γ'NiPtAl coating Platinum Oxidation Al_(2)O_(3) Superalloy

Effect of chip rate on the ranging accuracy in a regenerative pseudo-noise ranging system

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Journal of Zhejiang University-Science C(Computers and Electronics) 2011年第2期12卷 132-139页

作者： jian-wen jiang wei-jun YANG Chao-jie ZHANG Xiao-jun JIN Zhong-he JIN Department of Information Science and Electronic Engineering Zhejiang University Hangzhou 310027 China

The ranging accuracy of a pseudo-noise ranging system is mainly decided by range jitter and time delay discrimination. Many factors can affect the ranging accuracy, one of which is the chip rate. In digital signal processing, the time delay discrimination and autocorrelation function of sampled ranging sequences of different chip rates are very different. An approximation simulation model is established according to an in-phase quadrature (I/Q) correlator which is used to evaluate the time delay. Simulation results of the range jitter and time delay discrimination show that the chip rate which provides a non-integer sample-to-chip rate ratio can achieve a higher ranging accuracy, and some test results validate the simulation model. In some design missions, the simulation results may help to select an optimum sample-to-chip rate ratio to satisfy the design requirement on the ranging accuracy.

关键词： Ranging accuracy Range jitter Time delay discrimination Sample-to-chip rate ratio Integration time Autocorrelation function Fractional chip period delay

Micro-Climate Evaluation System in Thermal Mines

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Journal of China University of Mining and Technology 2006年第1期16卷 1-4页

作者： YANG Sheng-qiang OU Xiao-ying CHENG jian-wei WANG Yi-jiang YU Bao-hai School of Mineral and Safety Engineering China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China

A fuzzy evaluation method was used to evaluate the microclimate in thermal mines. A theoretical model of a microclimate evaluation system was designed and membership functions of the evaluation indices in the system were established. An analytical hierarchy process (AHP) was used to analyze the weight of the evalua- tion indices and their methods of calculation. Software for this evaluation system was developed and used for the evaluation of the microclimate of 714 sections in a mine. It is shown that the evaluation results correspond com- pletely with the actual situation. This evaluation system and the software can be applied in thermal mines.

关键词： membership grade weight fuzzy evaluation method thermal mine

Quantum Teleportation of One-to-Many Using (n+1)-Particle Entanglement

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Communications in Theoretical Physics 2007年第10期48卷 623-625页

作者： SHA Jin-Qiao FANG jian-Xing jiang wei-Xing School of Physical Science and Technology,Suzhou University,Suzhou 215006,China School of Physical Science and Technology Suzhou University Suzhou 215006 China

In this paper,quantum teleportation of one-to-many using(n+1)-particle entanglement is *** thesender(Alice)wants to transmit an unknown quantum state to a distant receiver(Bob),similar to the previous schemes,Alice performs Bell-state measurement on particles belonging to herself and informs the receiver the results through theclassical *** that,it needs to perform the Hadamard operation on the other(n-1)particles and measurethem as *** the aid of the measurement results,Bob can operate a corresponding unitary transformation on hisparticle to reconstruct the original *** course,the reconstruction may realize at either location of n,but it cannotrealize at all locations at the same time.

关键词： quantum teleportation quantum entangled state unitary transformation

Quantum Teleportation of One-to-Many Using （n ＋ 1）-Particle Entanglement

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Communications in Theoretical Physics 2007年第4X期48卷 623-625页

作者： SHA Jin-Qiao FANG jian-Xing jiang wei-Xing School of Physical Science and Technology Suzhou University Suzhou 215006 China

In this paper, quantum teleportatlon of one-to-many using （n ＋1）-particle entanglement is presented. If the sender （Alice） wants to transmit an unknown quantum state to a distant receiver （Bob）, similar to the previous schemes, Alice performs Bell-state measurement on particles belonging to herself and informs the receiver the results through the classical channel. After that, it needs to perform the Hadamard operation on the other （n - 1） particles and measure them as well. With the aid of the measurement results, Bob can operate a corresponding unitary transformation on his particle to reconstruct the original state. Of course, the reconstruction may realize at either location of n, but it cannot realize at all locations at the same time.

关键词： quantum teleportation quantum entangled state unitary transformation

Well-controlled Organocatalytic Ring-opening Polymerization of Seven-membered Cyclic Carbonates with Cyclohexyl Fusion

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Chemical Research in Chinese Universities 2024年第5期40卷 856-862页

作者： ZHANG wei SHAN Si-Yi DAI jiang CAI Zhongzheng ZHU jian-Bo Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization College of Chemical Engineering and Materials ScienceTianjin University of Science and TechnologyTianjin300457P.R.China National Engineering Laboratory of Eco-friendly Polymeric Materials(Sichuan) College of ChemistrySichuan UniversityChengdu610064P.R.China

Developing green and well-controlled polymerization methods is of great significance for the preparation of biomedical polymer *** this contribution,an efficient organocatalytic ring-opening polymerization(ROP)of a class of seven-membered cyclic carbonates(T6DO,T6HDO,C6DO,C6HDO)containing cis-or trans-cyclohexane structure was *** catalyst 1,5,7-triazabicyclo[4.4.0]dec-5-ene(TBD)promoted living polymerization of these cyclic carbonates to deliver polycarbonate and block copolymer products with predictable molecular weights and narrow *** robust TBD-mediated ROP at 90°C showcased turnover frequency(TOF)up to 10^(3)h^(−1).The resulting amorphous polycarbonates displayed good thermal stability.

关键词： CO_(2) Organic catalyst Living ring-opening polymerization Aliphatic polycarbonate