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Comparison of very-high-frequency ultrasound assessment of radial arterial wall layers after first and repeated transradial coronary procedures

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Journal of Geriatric Cardiology 2017年第4期14卷 245-253页

作者： Bei-Bei ZHANG Yu-Jie ZHOU Jie DU Shi-Wei YANG zhi-jiang WANG Hua SHEN zhi-Ming ZHOU Bering Anzhen Hospital Capital Medical University Beijing Institute of Heart Lung and Blood Vessel Disease Beijing China

Background Transradial coronary procedure （TRP） traumatizes the radial artery （RA）, especially resulting in changes to arterial wall morphology. This study explored the significance of the early onset of traumatic effects to wall layers of the RA following the first TRP （FTRP） and repeat TRP （RTRP） using very-high-frequency ultrabiomicroscopy （VHFUBM）. Methods A total of 1431 patients that re- ceived TRP were divided into the FTRP group that comprised 781 patients and the RTRP group that comprised 650 patients depending on the number of procedures. Two-dimensional RA images were acquired by 30-55 MHz ultrasound one day before and one day after the pro- cedure. Results After TRP, the incidence of intimal tears, medial dissections and external elastic lamina fracture were greater in the RTRP （P 〈 0.001）. The RTRP group showed significantly thicker intimal thickness （IT）, media thickness （MT）, adventitia thickness and all complex layer thicknesses as compared with the FTRP group （P 〈 0.001）. Conclusions Multivariate linear regression analysis discovered that repeated TRP and other observations were independent predictors of increased IT in post-operative RA. VHFUBM provides an approach to study structural and histopathological injury in the wall layers of RA which showed increased trauma to the RA following RTRP.

关键词： Radial arterial wall morphology Transradial procedure Very-high-frequency ultrabiomicroscopy

Impact of low/high-κ spacer-source overlap on characteristics of tunnel dielectric based tunnel field-effect transistor

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Journal of Central South University 2017年第11期24卷 2572-2581页

作者： jiang zhi ZHUANG Yi-qi LI Cong WANG Ping LIU Yu-qi School of Microelectronics Xidian UniversityXi’an 710071China

The effects of low-κ and high-κ spacer were investigated on the novel tunnel dielectric based tunnel field-effect transistor(TD-FET) mainly based upon ultra-thin dielectric direct tunneling mechanism. Drive currents consist of direct tunneling current and band-to-band tunneling(BTBT) current. Meanwhile, tunneling position of the TD-FET differs from conventional tunnel-FET in which the electron and hole tunneling occur at intermediate rather than surface in channel(or source-channel junction under gate dielectric). The 2-D nature of TD-FET current flow is also discussed that the on-current is degraded with an increase in the spacer width. BTBT current will not begin to play part in tunneling current until gate voltage is 0.2 V. We clearly identify the influence of the tunneling dielectric layer and spacer electrostatic field on the device characteristics by numerical simulations. The inserted Si_3N_4 tunnel layer between P+ region and N+ region can significantly shorten the direct and band-to-band tunneling path, so a reduced subthreshold slope(Ss) and a high on-current can be achieved. Above all the ambipolar current is effectively suppressed, thus reducing off-current. TD-FET demonstrates excellent performance for low-power applications.

关键词： tunnel dielectric based tunnel field-effect transistor tunnel field-effect transistor band-to-band tunneling tunneling dielectric layer subthreshold slope off-current on-current

Movement laws and mechanical characteristics of top coal in blasting face

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Journal of Coal Science & Engineering(China) 2010年第4期16卷 352-355页

作者： SUN Guang-zhong jiang zhi-gang Department of Safety Engineering Henan Institute Technology and Engineering Zhengzhou 451191 China School of Energy Science and Engineering Henan Polytechnic University Jiaozuo 454000 China

Measuring the top coal movement and abutment pressure about Teaching ThirdMine that belonged to the National Energy Investment and *** shows that thetop coal's strong compression occurs 6 m in front of the face, the top coal is in front of sideabutment pressure concentration increase area at this time, and the top coal horizontaldisplacement increase *** analyzed the top coal mechanical properties, and thetop coal under abutment pressure turned into block ***, analyzed the top coalfailure mechanism and the structure of the mechanical model, and also made a theoreticalanalysis of the top coal's ultimate bearing capacity.

关键词： top coal caving abutment pressure mechanical model ultimate bearing capacity

Model predictive control with an on-line identification model of a supply chain unit

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Journal of Zhejiang University-Science C(Computers and Electronics) 2010年第5期11卷 394-400页

作者： Jian NIU Zu-hua XU Jun ZHAO zhi-jiang SHAO Ji-xin QIAN State Key Lab of Industrial Control Technology Zhejiang University Hangzhou 310027 China

A model predictive controller was designed in this study for a single supply chain unit.A demand model was described using an autoregressive integrated moving average(ARIMA) model,one that is identified on-line to forecast the future *** was used to modify the demand prediction,and profit was chosen as the control *** imitate reality,the purchase price was assumed to be a piecewise linear form,whereby the control objective became a nonlinear *** addition,a genetic algorithm was introduced to solve the *** were put on the predictive inventory to control the inventory fluctuation,that is,the bullwhip effect was *** model predictive control(MPC) method was compared with the order-up-to-level(OUL) method in *** results revealed that using the MPC method can result in more profit and make the bullwhip effect controllable.

关键词： Supply chain Model predictive control On-line identification Optimization with constraint Piecewise linear price

A Novel Gait Pattern Recognition Method Based on LSTM-CNN for Lower Limb Exoskeleton

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Journal of Bionic Engineering 2021年第5期18卷 1059-1072页

作者： Chao-feng Chen zhi-jiang Du Long He Yong-jun Shi Jia-qi Wang Wei Dong State Key Laboratory of Robotics and System Harbin Institute of Technology(HIT)Harbin 150001China China South Industries Group Corporation Weapon Equipment Research InstituteBeijing 102202China

This paper describes a novel gait pattern recognition method based on Long Short-Term Memory(LSTM)and Convolutional Neural Network(CNN)for lower limb *** Inertial Measurement Unit(IMU)installed on the exoskeleton to collect motion information,which is used for LSTM-CNN *** article considers five common gait patterns,including walking,going up stairs,going down stairs,sitting down,and standing *** the LSTM-CNN model,the LSTM layer is used to process temporal sequences and the CNN layer is used to extract *** optimize the deep neural network structure proposed in this paper,some hyperparameter selection experiments were carried *** addition,to verify the superiority of the proposed recognition method,the method is compared with several common methods such as LSTM,CNN and *** results show that the average recognition accuracy can reach 97.78%,which has a good recognition eff ***,according to the experimental results of gait pattern switching,the proposed method can identify the switching gait pattern in time,which shows that it has good real-time performance.

关键词： Lower limb exoskeleton Gait pattern recognition LSTM-CNN Recognition accuracy Real-time performance

Breeding the Mite-Resistant Honeybee by Nutritional Crossbreed Technology

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Agricultural Sciences in China 2008年第6期7卷 762-767页

作者： XIE Xian-bing PENG Wen-jun ZENG zhi-jiang Honeybee Research Institute Jiangxi Agricultural University Nanchang 330045 P.R.China Institute of Apicultural Research Chinese Academy of Agricultural Sciences Beijing 100093 P.R.China Quanzhou Normal University Quanzhou 362000 P.R.China

Mite （Varroa destructor） is one of the most serious parasite threats to the honey bee （Apis mellifera） reared in China. The beekeepers mainly use the drug to control and kill the mite in the past years, but the honey products may be contaminated and the mite is becoming drug-resistant. The main idea of this paper is to research the possibility of mite-resistant honeybee rearing by nutritional crossbreed. The larvae （Apis mellifera ligustica） are bred with the royal jelly of Apis carana carana, and then the morphological index of the worker generation, genotypic frequency and gene frequency of the MDH Ⅱ, genetic resemblance, and mite resistance are measured. The results show that： compared to the parent workers, the proboscis length, anterior wing area, the total length of the third and fourth dorsal plate of the abdomen, the length of the fourth dorsal plate of the tuberculum, the area of the sixth abdominal segment, and the area of wax mirrors are significantly different, but the differences in the brachium index, dactylus index, and wing claw are not significant. Moreover, there are some mutations in the genotypic frequency and gene frequency of the MDH Ⅱ. The mite resistance of the nutritional crossbreed worker is significantly higher. The morphological, physical, and biochemical characters, genetic resemblance, and the mite-resistant ability of the worker generation can be changed by nutritional crossbreeding. Nutritional crossbreeding can be a new way to breed the honeybee.

关键词： honeybees Varroa destructor nutritional crossbreed

RE-NiO_(x)(RE=Ce,Y,La)composite oxides coupled plasma catalysis for benzene oxidation and by-product ozone removal

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Journal of Rare Earths 2023年第6期41卷 789-800,I0001页

作者： Yikun Zhang zhidong Wei Yong Zhu Shanlong Tao Mingxia Chen zhixiang Zhang zhi jiang Wenfeng Shangguan Research Center for Combustion and Environment Technology School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China

Plasma-coupled catalysis is a promising volatile organic co mpounds(VOCs) removal technology because of its interactional principles of plasma decomposition and catalytic ***,the problem of harmful by-products is still in trouble.A series of rare earth doped RE-NiO_(x)(RE=Ce,Y,La) composite oxides were synthesized by metal organic frameworks(MOFs)-derived method for coupled plasma oxidation of benzene and by-product ozone *** with plasma alone,the 1%La-NiO_(x)catalyst shows the best enhancement of 50% for benzene conversion with complete removal of a maximum of 800 ppm *** energy consumption for 90% benzene removal efficiency(η90%) is also reduced from 3600 to 1200 J/*** re sults of RE-NiO_(x) catalysts indicate that the doping of La causes interaction and synergistic effect between La and Ni,and the surface oxygen and lattice oxygen with defects play crucial roles in benzene oxidation and ozone decomposition,*** addition,the decomposition mechanism of benzene and ozone under plasma is *** is responsible for the indiscriminate bond breaking in benzene and oxygen to form a variety of organic intermediates and ozone,while the La-NiO_(x) catalyst selectively oxidizes the intermediates to CO_(x)/H2O and decomposes the ozone into oxygen.

关键词： Plasma catalysis Benzene removal By-product ozone control Rare earths doping La-NiO_(x)composite oxide

Kinematics/Fuzzy Logic Combined Controller for Formation Control of Mobile Robots

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Journal of Harbin Institute of Technology(New Series) 2013年第4期20卷 121-128页

作者： zhi-jiang Du Li-Min Ren Wei-Dong Wang Wei Dong State Key Laboratory of Robotics and System Harbin Institute of Technology College of Mechanical Engineering Beihua University

A kinematics and fuzzy logic combined formation controller was proposed for leader-follower based formation control using backstepping method in order to accommodate the dynamics of the *** kinematics controller generates desired linear and angular velocities for follower robots,which make the configuration of follower robots coverage to the *** fuzzy logic controller takes dynamics of the leader and followers into consideration,which is built upon Mamdani fuzzy *** force and torque acting on robots are described as linguistic variables and also 25 if-then rules are *** addition,the fuzzy logic controller adopts the Centroid of Area method as defuzzification strategy and makes robots’actual velocities converge to the expected which is generated by the kinematics *** innovation of the kinematics and fuzzy logic combined formation controller presented in the paper is that the perfect velocity tracking assumption is removed and realtime performance of the system is *** with traditional torque-computed controller,the velocity error convergence time in case of the proposed method is shorter than traditional torque-computed *** simulation results validate that the proposed controller can drive robot members to form the desired formation and formation tracking errors which can coverage to a neighborhood of the ***,the simulations also show that the proposed method has better velocity convergence performance than traditional torque-computed method.

关键词： kinematics/fuzzy logic combined formation controller mobile robot backstepping

Morphology-Controlled Growth of A1N One-Dimensional Nanostructures

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Journal of Materials Science & Technology 2008年第4期24卷 608-614页

作者： Ting XIE Min YE Xiaosheng FANG zhi jiang Li CHEN Mingguang KONG Yucheng WU Lide ZHANG Institute of Tribology Hefei University .of Technology Hefei 230009 China Key laboratory of Materials Physics Institute of Solid State Physics Chinese Academy of Sciences Hefei 230031 China

Aluminum nitride （AIN） nanowires, serrated nanoribbons, and nanoribbons were selectively obtained through a simple chloride assisted chemical vapor deposition process. The morphologies of the products could be controlled by adjusting the deposition position and the flux of the reactant gas. The morphologies and structures of the AIN products were investigated in detail. The formation mechanism of the as-prepared different morphologies of AIN one-dimensional （ID） nanostructures was discussed on the basis of the experimental results.

关键词： Aluminum nitride Morphology-controlled growth One-dimensional nanostructure