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Factors Influencing Dual Phase Steel Flanging Limit Punching

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Journal of Iron and Steel Research International 2014年第12期21卷 1124-1128页

作者： jian-qing QIAN Yuan YUE Anhui University of Technology

Based on pre punching to hot rolled martensitic and bainitic dual phase steels with similar elongation and work hardening index （n）, as well as similar thickness and hole expansion test using taper die, analysis of the hole expansion rate indicated significant difference in their flanging performance. The results indicated that mechanical property was not the only major factor that influenced flanging. Further analysis of the hole border microstructure, work hardening condition, and fracture property showed that the fracture property of sheets was the major factor that influenced flanging performance.

关键词： flanging fracture property mechanical property dual phase steel

后路C_(2-3)固定结合顶棒置入与单纯后路C_(2-3)固定治疗不稳定Hangman骨折的比较

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中国组织工程研究 2025年第9期29卷 1848-1854页

作者：张浩王清张建李广州王高举西南医科大学附属医院骨科四川省泸州市646000

背景:Hangman骨折中Ⅱ、ⅡA、Ⅲ型常需手术治疗,手术方式选择存在较大争议,目前均存在术后复位不全及畸形愈合等不足;前期作者团队使用C_(2-3)拉力螺钉结合经口顶棒技术间歇性推顶C2椎体治疗不稳定Hangman骨折,取得了满意的临床疗效,但... 详细信息

背景:Hangman骨折中Ⅱ、ⅡA、Ⅲ型常需手术治疗,手术方式选择存在较大争议,目前均存在术后复位不全及畸形愈合等不足;前期作者团队使用C_(2-3)拉力螺钉结合经口顶棒技术间歇性推顶C2椎体治疗不稳定Hangman骨折,取得了满意的临床疗效,但前期研究样本少,且缺少对照组比较。目的:比较后路C_(2-3)固定结合经口顶棒技术和单纯后路C_(2-3)固定治疗不稳定Hangman骨折的临床疗效。方法:回顾性分析西南医科大学附属医院收治的行后路C_(2-3)固定手术治疗的55例不稳定Hangman骨折患者临床及影像学资料,根据手术方案分为2组,其中23例患者接受后路C_(2-3)固定结合经口顶棒技术治疗(A组),32例接受单纯后路C_(2-3)固定术(B组)。比较两组患者的手术时间、术中出血量、并发症、术前及末次随访时疼痛目测类比评分、颈椎功能障碍指数、美国脊髓损伤协会脊髓损伤分级和患者满意度(Odom’s分级);另外对比各观察时间点C_(2-3)移位和成角及其他影像学指标的变化。结果与结论:①两组患者手术时间、术中出血量和术后并发症发生情况比较差异无显著性意义(P>0.05);②两组患者末次随访颈痛目测类比评分和颈椎功能障碍指数较术前获得显著改善(P0.05);③两组术前C_(2-3)成角和位移差异无显著性意义(P>0.05);术后及末次随访时,两组患者C_(2-3)成角和位移均较术前明显减小,差异有显著性意义(P0.05);术后及末次随访时,A组C_(2-3)位移和成角较B组明显减小,差异有显著性意义(P<0.05);④末次随访时,A组患者均未发生残余畸形,B组发生残余畸形4例(13%,4/32);⑤因此,后路C_(2-3)固定结合经口顶棒技术可能有利于枢椎体复位和稳定,减少畸形愈合,获得更好的复位。

关键词： Hangman骨折顶棒技术后路拉力螺钉骨折复位内固定

Ion-beam-assisted characterization of quinoline-insoluble particles in nuclear graphite

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Nuclear Science and Techniques 2020年第10期31卷 23-32页

作者： qing Huang Xin-qing Han Peng Liu jian-jian Li guan-Hong Lei Cheng Li Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China School of Physics State Key Laboratory of Crystal MaterialsKey Laboratory of Particle Physics and Particle Irradiation(MOE)Shandong UniversityJinan 250100China

The irradiation behavior of graphite is essential for its applications in the nuclear ***,the behavioral differences of graphite remain obscure because of the very limited comprehension of its microstructural *** typical structure,the quinoline-insoluble(QI)particle,was investigated using IG-110 and NBG-18 *** irradiation,the QI particles on the polished surface were proven to become hillocks,which were easily identifiable via scanning electron microscopy(SEM).Thus,a method that combined ion irradiation and SEM characterization was proposed to study the distribution and concentration of QI particles in *** irradiation,the QI particles were found to evolve into densified spheres,which were weakly bonded with the surrounding graphite structures,thereby indicating that the densification of QI particles did not evidently contribute to graphite dimensional shrinkage.A much higher concentration of QI particles in NBG-18 than IG-110,which was suggested to be responsible for the smaller maximum dimensional shrinkage of former over the latter during irradiation,was characterized.

关键词： Heavy ion irradiation Nuclear graphite Quinoline insoluble Microstructure

A novel adaptive classification scheme for digital modulations in satellite communication

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High Technology Letters 2007年第2期13卷 145-149页

作者：吴丹 gu Xuemai guo qing Communications Research Center Harbin Institute of Technology Harbin 150001 P.R.China t

To make the modulation classification system more suitable for signals in a wide range of signal to noise ratios （SNRs）, a novel adaptive modulation classification scheme is presented in this paper. Differ-ent from traditional schemes, the proposed scheme employs a new SNR estimation algorithm for small samples before modulation classification, which makes the modulation classifier work adaptively according to estimated SNRs. Furthermore, it uses three efficient features and support vector machines （SVM） in modulation classification. Computer simulation shows that the scheme can adaptively classify ten digital modulation types （i.e. 2ASK, 4ASK, 2FSK, 4FSK, 2PSK, 4PSK, 16QAM, TFM, π/4QPSK and OQPSK） at SNRS ranging from 0dB to 25dB and success rates are over 95% when SNR is not lower than 3dB. Accuracy, efficiency and simplicity of the proposed scheme are obviously improved, which make it more adaptive to engineering applications.

关键词： adaptive modulation classification support vector machine SNR estimation digital modulation

Fault detection for sector-bounded non-linear systems with servo inputs and sensor stuck faults

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Journal of Control and Decision 2019年第3期6卷 147-165页

作者： Ying gu Xiao-jian Li School of Science Dalian Jiaotong UniversityDalianChina College of Information Science and Engineering Northeastern UniversityShenyangChina State Key Laboratory of Synthetical Automation of Process Industries Northeastern UniversityShenyangChina

This paper addresses the fault detection(FD)problem for discretetime sector-bounded non-linear systems with finite-frequency servo *** non-linear systems are firstly modelled as *** main contributions are that a novel FD filter which combines the finite-frequency H∞and H−indices is *** from the existing methods,the proposed FD scheme guarantees that the generated residuals are robust against the servo inputs in fault-free case and sensitive to them in faulty ***,the small sensor stuck faults including outagefaults can be *** this class of systems,the existing finite-frequency FD filter design methods are invalid.A new lemma is developed to characterise the system performances in finite-frequency *** addition,sufficient conditions for the existence of such a FD filter are derived by introducing slack variable and linear matrix inequalities ***,an example is presented to demonstrate the method and its effectiveness.

关键词： Fault detection servo inputs sensor stuck faults sector-bounded nonlinearity finite-frequency domain

Experimental investigation of ultra-early-strength cement-based selfcompacting high strength concrete slabs(URCS)under contact explosions

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Defence Technology（防务技术） 2023年第6期24卷 326-339页

作者： Wei Wang qing Huo jian-chao Yang jian-hui Wang Xing Wang Key Laboratory of Impact and Safety Engineering Ningbo UniversityMinistry of EducationNingbo315211ZhejiangChina Institute of Defence Engineering AMS PLALuoyang471023China Institute of Advanced Energy Storage Technology and Equipment Ningbo UniversityNingbo315211ZhejiangChina

In this paper,UR50 ultra-early-strength cement-based self-compacting high-strength concrete slabs(URCS)have been subjected to contact explosion tests with different TNT charge quality,aiming to evaluate the anti-explosive performance of *** the experiment,three kinds of ultra-early-strength cement-based reinforced concrete slabs with different reinforcement ratios and a normal concrete slab(NRCS)were used as the control specimen,the curing time of URCS is 28 days and 24 h *** research results show that URCS has a stronger anti-explosion ability than *** failure mode of URCS under contact explosion is that the front of the reinforced concrete slab explodes into a crater,and the back is *** the increase of the charge,the failure mode of the reinforced concrete slab gradually changed to explosive penetration and explosive *** experiment results also show that the reinforcement ratio of URCS has little effect on the anti-blast performance,and URCS can reach its anti-blast performance at 28 days after curing for 24 *** this basis,the damage parameters of URCS for different curing durations were quantified,and an empirical formula for predicting the diameter of the crater and spalling was established.

关键词： Ultra-early-strength concrete slabs Blast load Contact blast Blast-resistant performance

Two Kinds of New Lie Algebras for Producing Integrable Couplings

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Communications in Theoretical Physics 2006年第2X期46卷 203-208页

作者： YAN qing-You QI jian-Xun School of Business Administration North China Electric Power University Beijing 102206 China

Two types of Lie algebras are constructed, which are directly used to deduce the two resulting integrable coupling systems with multi-component potential functions. Many other integrable couplings of the known integra... 详细信息

关键词： KN hierarchy integrable couplings Lie algebra loop algebra

Wiener model identification and nonlinear model predictive control of a pH neutralization process based on Laguerre filters and least squares support vector machines

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Journal of Zhejiang University-Science C(Computers and Electronics) 2011年第1期12卷 25-35页

作者： qing-chao WANG jian-zhong ZHANG School of Energy Science and Engineering Harbin Institute of Technology Harbin 150001 China SINOPEC Safety Engineering Institute Qingdao 266071 China

This paper deals with Wiener model based predictive control of a pH neutralization *** dynamic linear block of the Wiener model is parameterized using Laguerre filters while the nonlinear block is constructed using least squares support vector machines (LSSVM).Input-output data from the first principle model of the pH neutralization process are used for the Wiener model *** results show that the proposed Wiener model has higher prediction accuracy than Laguerre-support vector regression (SVR) Wiener models,Laguerre-polynomial Wiener models,and linear Laguerre *** identified Wiener model is used here for nonlinear model predictive control (NMPC) of the pH neutralization *** set-point tracking performance of the proposed NMPC is compared with those of the Laguerre-SVR Wiener model based NMPC,Laguerre-polynomial Wiener model based NMPC,and linear model predictive control (LMPC).Validation results show that the proposed NMPC outperforms the other three controllers.

关键词： Wiener model Nonlinear model predictive control (NMPC) pH neutralization process Laguerre filters Least squares support vector machines (LSSVM)

Applying a global pulse disturbance to eliminate spiral waves in models of cardiac muscle

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Chinese Physics B 2021年第7期30卷 157-162页

作者： jian Gao Changgui gu Huijie Yang Business School University of Shanghai for Science and TechnologyShanghai 200093China

Removal of spiral waves in cardiac muscle is necessary because of their threat to *** methods for this removal are to apply a local disturbance to the media,such as a periodic ***,most of these methods accelerate the beating of the cardiac muscle,resulting in the aggravation of the ventricular tachycardia,which directly threatens *** the present study,in order to clear off spiral waves,a global pulse-disturbance is applied to the media based on three models of cardiac *** is found that the spiral waves are eliminated and the frequency of the cardiac muscle is decreased in a short time,and finally,the state of the medium reaches the normal oscillation,which supports a target *** method sheds light on the removal of spiral waves in cardiac muscle and can prevent the ventricular tachycardia as well as the ventricular fibrillation.

关键词： ventricular fibrillation spiral wave pattern formation elimination