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Revisiting the Hierarchical Microstructures of an Al-Zn-Mg Alloy Fabricated by Pre-deformation and Aging

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Acta Metallurgica Sinica(English Letters) 2020年第11期33卷 1518-1526页

作者： Xiong-Wei Yu Jiang-Hua Chen Wen-Quan Ming xiu-bo yang Tian-Tian Zhao Ruo-Han Shen Yu-Tao He Cui-Lan Wu Center for High-Resolution Electron Microscopy College of Materials Science and EngineeringHunan UniversityChangsha 410082China

Pre-deformation before aging has been demonstrated to have a positive effect on the mechanical strength of the 7N01 alloy in our previous study,which is rather different from the general negative effects of pre-deformation on high-strength 7XXX aluminum *** order to explain the strengthening mechanism relating to the positive effect,in the present study,the microstructure of the aged 7N01 alloy with different degrees of pre-deformation was investigated in detail using advanced electron microscopy *** results show that,without pre-deformation,the aged alloy is strengthened mainly by the η′type of hardening *** contrast,with pre-deformation,the aged alloy is strengthened by the hierarchical microstructure consisting of the GP-η′type of precipitates formed inside sub-grains,the ηp type of precipitates formed at small-angle boundaries,and the dislocation introduced by pre-deformation(residual work-hardening effect).By visualizing the distribution of theηp precipitates through three-dimensional electron tomography,the 3 D microstructures of dislocation cells are clearly *** combinations of ηp precipitates,GP-η′precipitates and residual dislocations in the alloy are responsible for the positive effect of pre-deformation on its mechanical properties.

关键词： Aluminum alloys Precipitates Pre-deformation Three-dimensional electron tomography(3DET) Dislocation cell

Application of the Peierls–Nabarro Model to Symmetric Tilt Low-Angle Grain boundary with Full Dislocation in Pure Magnesium

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Acta Metallurgica Sinica(English Letters) 2016年第11期29卷 1053-1063页

作者： Tou-Wen Fan xiu-bo yang Jiang-Hua Chen Ling-Hong Liu Ding-Wan Yuan Yong Zhang Cui-Lan Wu Center for High-Resolution Electron Microscopy College of Materials Science and Engineering Hunan University Department of Applied Physics School of Physics and Electronics Hunan University Hunan Province Key Laboratory for Spray Deposition Technology and Application Hunan University College of Science Central South University of Forestry and Technology

Three types of symmetric （1120） tilt low-angle grain boundaries （LAGBs） with array of basal, prismatic, and pyramidal edge full 〈a〉 dislocations in pure Mg have been studied by using the improved Peierls-Nabarro model in combination with the generalized stacking fault energy curve. The results show that with decreasing distance between the dislocations in all the three types of tilt LAGBs, the stress and strain fields are gradually suppressed. The reduction extent of the stress and strain fields decreases from the prismatic to basal to pyramidal dislocations. The variation of dislocation line energy （DLE） for all tilt LAGBs is divided into three stages： DLE changes slightly and linearly when the distance is larger than 300 A, - 10%; DLE declines exponentially and quickly when the distance goes from 300 to 100 A, ,- 70%; and finally, the descent speed lowers when the distance is smaller than 100 A and the dislocation core energy is nearly half of the DLE. The grain boundary energy （GBE） decreases when the tilt angle of LAGB increases from1 ° to 2° for all cases. The tilt LAGB consists of pyramidal dislocations always has the largest GBE, while that with array of prismatic dislo- cations has the smallest one in the whole range. The Peierls stress of dislocation in tilt LAGB is nearly unchanged, the same as that of single dislocation. This work is useful for further study of dissociated dislocation, solute segregation, precipitate nucleation in tilt LAGB and its interaction with single dislocations.

关键词： Tilt grain boundary Generalized stacking fault energy Magnesium alloy Dislocation Peierlsstress

Prediction and stratification for the surgical adverse events after minimally invasive esophagectomy:A two-center retrospective study

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World Journal of Gastroenterology 2025年第3期31卷 50-61页

作者： Qi-Hong Zhong Jiang-Shan Huang Fei-Long Guo Jing-Yu Wu Mao-xiu Yuan Jia-Fu Zhu Wen-Wei Lin Sui Chen Zhen-yang Zhang Jiang-bo Lin Department of Thoracic Surgery Fujian Medical University Union HospitalFuzhou 350001Fujian ProvinceChina The Graduate School Fujian Medical UniversityFuzhou 350001Fujian ProvinceChina Department of Thoracic Surgery Affiliated Hospital of Jinggangshan UniversityJi’an 343000Jiangxi ProvinceChina

BACKGROUND Minimally invasive esophagectomy(MIE)is a widely accepted treatment for esophageal cancer,yet it is associated with a significant risk of surgical adverse events(SAEs),which can compromise patient recovery and long-term *** preoperative identification of high-risk patients is critical for improving *** To establish and validate a risk prediction and stratification model for the risk of SAEs in patients with *** This retrospective study included 747 patients who underwent MIE at two centers from January 2019 to February *** were separated into a train set(n=549)and a validation set(n=198).After screening by least absolute shrinkage and selection operator regression,multivariate logistic regression analyzed clinical and intraoperative variables to identify independent risk factors for SAEs.A risk stratification model was constructed and validated to predict the probability of *** SAEs occurred in 10.2%of patients in train set and 13.6%in the validation *** with SAE had significantly higher complication rate and a longer hospital stay after *** key independent risk factors identified included chronic obstructive pulmonary disease,a history of alcohol consumption,low forced expiratory volume in the first second,and low albumin *** stratification model has excellent prediction accuracy,with an area under the curve of 0.889 for the training set and an area under the curve of 0.793 for the validation *** The developed risk stratification model effectively predicts the risk of SAEs in patients undergoing MIE,facilitating targeted preoperative interventions and improving perioperative management.

关键词： Surgical adverse events Minimally invasive esophagectomy Esophageal cancer Stratification model Perioperative management

声诱饵仿真系统中终端演示的改进及相关问题探讨

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系统仿真学报 2003年第6期15卷 873-875页

作者：罗修波董阳泽刘平香上海船舶电子设备研究所上海200025

简要介绍了声诱饵仿真系统的结构,描述了系统对基于Multigen&Vega的终端演示平台产生的影响,并对终端演示中基于Vega的演示程序使用多进程并发、共享内存通信和轨迹插值等技术进行了改进,使声诱饵仿真系统中的终端演示效果有了较大的改善。

关键词： Vega 进程共享内存插值

Stability Criteria of Nonlinear Impulsive Differential Equations with Infinite Delays

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Acta Mathematicae Applicatae Sinica 2015年第4期31卷 921-934页

作者： yang LIU bo WU xiu-shan CAI Department of Mathematics Southeast University College of Mathematics Physics and Information EngineeringZhejiang Normal UniversityJinhua 321004China Graduate School Zhejiang Normal University

In this paper, we consider the uniform stability and uniformly asymptotical stability of nonlinear impulsive infinite delay differential equations. Instead of putting all components of the state variable x in one Lyapunov function, several Lyapunov-Razumikhin functions of partial components of the state variable x are used so that the conditions ensuring that stability are simpler and less restrictive; moreover, examples are discussed to illustrate the advantage of the results obtained.

关键词： uniformly asymptotical stability impulsive differential equation infinite delay

A New Bisesquiterpene from Ligularia macrophylla

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Chinese Chemical Letters 2002年第3期13卷 249-250页

作者： bo FU Qi xiu ZHU xiu Ping yang Zhong Jian JIA Department of Chemistry Lanzhou UniversityLanzhou 730000

From the roots of Ligularia macrophylla, a bisesquiterpene, ligumacrophyllal was isolated and its structure was elucidated on the basis of spectroscopic methods.

关键词： Ligularia macrophylla Compositae bisesquiterpene ligumacrophyllal.

A quantum image dual-scrambling encryption scheme based on random permutation

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Science China(Information Sciences) 2019年第12期62卷 286-295页

作者： Hai-Hua ZHU xiu-bo CHEN Yi-Xian yang Information Security Center State Key Laboratory of Networking and Switching TechnologyBeijing University of Posts and Telecommunications School of Computer and Information Technology Nanyang Normal University Sate Key Laboratory of Public Big Data Guizhou University

Dear editor,A popular image encryption scheme is the dualscrambling scheme that combines position transformation and bit-plane transformation. This scheme makes the image chaotic by changing the coordinate positions o... 详细信息

关键词： image A quantum image dual-scrambling encryption scheme based on random permutation

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浅谈复杂地质条件下的石门揭煤技术

铜业工程 2017年第5期 27-28,92页

作者：吴秀仪燕波杨超柴嘉伟刘从辉三峡大学土木与建筑学院湖北宜昌443002 三峡库区地质灾害省部共建教育部重点实验室湖北宜昌443002

煤与瓦斯突出极易在石门揭煤过程中发生,突出事故一旦发生,将摧毁巷道设施、通风系统,使矿井内充满瓦斯与煤粉,造成瓦斯窒息,威胁作业人员人身安全。当地质条件较复杂、矿井技术水平不高的小型矿井,在石门揭煤时应施工超前探孔、排放孔... 详细信息

煤与瓦斯突出极易在石门揭煤过程中发生,突出事故一旦发生,将摧毁巷道设施、通风系统,使矿井内充满瓦斯与煤粉,造成瓦斯窒息,威胁作业人员人身安全。当地质条件较复杂、矿井技术水平不高的小型矿井,在石门揭煤时应施工超前探孔、排放孔、揭煤前后加强支护的技术措施,从而保证石门的安全揭煤。该揭煤技术现场技术人员易掌握,施工方便、揭煤成本较低。

关键词：突出事故石门揭煤排放孔自然排放加强支护排放效果

Controlled Quantum Network Coding Without Loss of Information

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Computers, Materials & Continua 2021年第12期69卷 3967-3979页

作者： xiu-bo Pan xiu-bo Chen Gang Xu Haseeb Ahmad Tao Shang Zong-Peng Li Yi-Xian yang Information Security Center State Key Laboratory of Networking and Switching TechnologyBeijing University of Posts and TelecommunicationsBeijing100876China School of Information Science and Technology North China University of TechnologyBeijing100144China Department of Computer Science National Textile University Faisalabad37610Pakistan School of Cyber Science and Technology Beihang UniversityBeijing100083China Huawei Technologies Co.Ltd. Shenzhen518129China School of Computer Science Wuhan UniversityWuhan430072China

Quantum network coding is used to solve the congestion problem in quantum communication,which will promote the transmission efficiency of quantum information and the total throughput of quantum *** propose a novel controlled quantum network coding without information *** effective transmission of quantum states on the butterfly network requires the consent form a third-party controller ***,two pairs of threeparticle non-maximum entangled states are pre-shared between senders and *** adding auxiliary particles and local operations,the senders can predict whether a certain quantum state can be successfully transmitted within the butterfly network based on the Z-{10>,|1>}***,when trans-mission fails upon prediction,the quantum state will not be lost,and it will sill be held by the ***,the controller Charlie re-prepares another three-particle non-maximum entangled state to start a new *** the predicted transmission is successful,the quantum state can be transmitted successfully within the butterfly *** the receiver wants to receive the effective quantum state,the quantum measurements from Charlie are ***,when the transmission fails,Charlie does not need to integrate the X-{1+>,1->}basis to measure its own particles,by which quantum resources are *** not only controls the effective transmission of quantum states,but also the usage of classical and quantum ***,the implementation of the quantum circuits,as well as a flow chart and safety analysis of our scheme,is proposed.

关键词： Controlled quantum network coding without information loss quantum teleportation perfect transmission