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新疆师范大学学报（哲学社会科学版） 2025年第2期46卷 59-69,F0002页

作者：黄石松胡清中国人民大学国家发展与战略研究院北京100872 中国人民大学老年学研究所北京100872

我国正处于由中度老龄化社会步入重度老龄化社会的进程,银发经济将逐步从“以政府为主导的事业发展”阶段转向“事业和产业协同发展”的新阶段。准确把握这一转型发展特征,适时调整工作重心和节奏,注重运用市场机制推进产业发展迫在眉... 详细信息

我国正处于由中度老龄化社会步入重度老龄化社会的进程,银发经济将逐步从“以政府为主导的事业发展”阶段转向“事业和产业协同发展”的新阶段。准确把握这一转型发展特征,适时调整工作重心和节奏,注重运用市场机制推进产业发展迫在眉睫。对银发产业进行业态划分是制定产业组织政策、产业管理政策、产业发展政策的前提和基础,文本尝试将我国银发产业划分为基础性产业、延伸性产业和战略性产业,并据此分析三类产业在发展中存在的焦点难点问题,按照分类精准施策原则,提出优化我国银发经济发展路径的政策建议。

关键词：银发经济老龄产业老龄事业战略设计业态划分

Influence of Extrusion Joint on Microstructural Evolution and Properties of Mg Alloy Sheet

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Acta Metallurgica Sinica(English Letters) 2016年第5期29卷 475-482页

作者： qing-Shan Yang Zu-jian Yu hu-Cheng Pan qing-Wei Dai jian-hui Li School of Metallurgy and Materials Engineering Chongqing University of Science and TechnologyChongqing 401331China Chongqing Academy of Science and Technology Chongqing 401123China Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) Northeastern UniversityShenyang 110819China

The mechanical behaviour of AZ31 magnesium alloy sheet with the extrusion joint （EJ） was evaluated. Extruded joint of AZ31 alloy sheets was obtained by the hot extrusion process. Tensile tests were carried out along the extrusion direction at room temperature, and both the non-uniform plastic deformation and the fracture behaviour were studied. It is found that the samples with EJ present significantly deteriorated mechanical properties compared with the EJ- free counterpart. Inhomogeneous rnicrostructure distribution around EJ zone brings in the uncoordinated deformation due to the high density of {1012} twins which were readily activated during plastic deformation.

关键词： Mg alloy Microstructure Twin Texture Extrusion joint

A New Superlinearly Convergent SQP Algorithm for Nonlinear Minimax Problems

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Acta Mathematicae Applicatae Sinica 2007年第3期23卷 395-410页

作者： Jin-bao jian Ran Quan qing-jie hu College of Mathematics and Information Science Guangxi University Nanning 530004 China College of Electrical Engineering Guangxi University Nanning 530004 Chin Department of Information Hunan Business College Changsha 410205 China

In this paper, the nonlinear minimax problems are discussed. By means of the Sequential Quadratic Programming （SQP）, a new descent algorithm for solving the problems is presented. At each iteration of the proposed algorithm, a main search direction is obtained by solving a Quadratic Programming （QP） which always has a solution. In order to avoid the Maratos effect, a correction direction is obtained by updating the main direction with a simple explicit formula. Under mild conditions without the strict complementarity, the global and superlinear convergence of the algorithm can be obtained. Finally, some numerical experiments are reported.

关键词： Minimax problems SQP algorithm global convergence superlinear convergence

Recent advances in efficient computation of deep convolutional neural networks

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Frontiers of Information Technology & Electronic Engineering 2018年第1期19卷 64-77页

作者： jian CHENG Pei-song WANG Gang LI qing-hao hu Han-qing LU National Laboratory of Pattern Recognition Institute of Automation Chinese Academy of Sciences Beijing 100190 China University of Chinese Academy of Sciences Beijing 100049 China

Deep neural networks have evolved remarkably over the past few years and they are currently the fundamental tools of many intelligent *** the same time,the computational complexity and resource consumption of these networks continue to *** poses a significant challenge to the deployment of such networks,especially in real-time applications or on resource-limited ***,network acceleration has become a hot topic within the deep learning *** for hardware implementation of deep neural networks,a batch of accelerators based on a field-programmable gate array(FPGA) or an application-specific integrated circuit(ASIC)have been proposed in recent *** this paper,we provide a comprehensive survey of recent advances in network acceleration,compression,and accelerator design from both algorithm and hardware points of ***,we provide a thorough analysis of each of the following topics:network pruning,low-rank approximation,network quantization,teacher–student networks,compact network design,and hardware ***,we introduce and discuss a few possible future directions.

关键词： Deep neural networks Acceleration Compression Hardware accelerator

Roll gap prediction in acceleration and deceleration process of cold rolling based on a data-driven method

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Journal of Iron and Steel Research International 2023年第5期30卷 1013-1021页

作者： Yun-jian hu Jie Sun huai-tao Shi qing-long Wang jian-zhao Cao School of Mechanical Engineering Shenyang Jianzhu UniversityShenyang 110168LiaoningChina The State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819LiaoningChina Department of Mechanical Engineering North China Electric Power UniversityBaoding 071003HebeiChina

Severe fluctuation of the effective roll gap in the acceleration and deceleration section of the cold rolling process is a significant factor causing thickness ***,the conventional roll gap compensation method and control strategy do not meet the stringent strip quality *** roll gap model in the acceleration and deceleration process is studied to increase the thickness control *** order to improve model accuracy,a roll gap prediction method based on data-driven is *** the complexities of the cold rolling process,the extreme gradient boosting(XGBoost)method is used to predict the roll gap model as the rolling speed ***,support vector regression and neural network-based methods are taken to evaluate and compare the prediction *** on the field data,the simulation experiments are carried *** demonstrated that the prediction performance of the proposed method outperformed the other two *** values of root mean square error,determination coefficient value,mean absolute percentage error and mean absolute error obtained from the XGBoost model were equal to 0.000346,0.952,7.02,and 0.00028,*** addition,the proposed method analyzed the contribution rates of the rolling affecting parameters on the roll *** data showed that in the controllable rolling parameters,the rolling speed is the most impacting factor that disturbs the roll gap model in the acceleration and deceleration process,which can provide a useful direction for actual roll gap adjustment.

关键词： Cold rolling Acceleration Deceleration Roll gap model Extreme gradient boosting Contribution rate Analysis

Attribute reduction in interval-valued information systems based on information entropies

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Frontiers of Information Technology & Electronic Engineering 2016年第9期17卷 919-928页

作者： jian-hua DAI hu hu Guo-jie ZHENG qing-hua hu hui-feng HAN Hong SHI School of Computer Science and Technology Tianjin University College of Computer Science and Technology Zhejiang University

Interval-valued data appear as a way to represent the uncertainty affecting the observed values. Dealing with interval-valued information systems is helpful to generalize the applications of rough set theory. Attribute reduction is a key issue in analysis of interval-valued data. Existing attribute reduction methods for single-valued data are unsuitable for interval-valued data. So far, there have been few studies on attribute reduction methods for interval-valued data. In this paper, we propose a framework for attribute reduction in interval-valued data from the viewpoint of information theory. Some information theory concepts, including entropy, conditional entropy, and joint entropy, are given in interval-valued information systems. Based on these concepts, we provide an information theory view for attribute reduction in interval-valued information systems. Consequently, attribute reduction algorithms are proposed. Experiments show that the proposed framework is effective for attribute reduction in interval-valued information systems.

关键词： Rough set theory Interval-valued data Attribute reduction Entropy

Polyethylenimine-cyclodextrin-tegafur conjugate shows anti-cancer activity and a potential for gene delivery

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2011年第9期12卷 720-729页

作者： Qi-da hu hui FAN Wei-jian LOU qing-qing WANG Gu-ping TANG Institute of Chemical Biology and Pharmaceutical Chemistry Zhejiang UniversityHangzhou 310028China Department of Pharmacy Sir Run Run Shaw HospitalSchool of MedicineZhejiang UniversityHangzhou 310016China Institute of Immunology Zhejiang UniversityHangzhou 310058China The First Affiliated Hospital School of MedicineZhejiang UniversityHangzhou 310003China

Polyethylenimine-cyclodextrin-tegafur(PEI-CyD-tegafur) conjugate was synthesized as a novel multifunctional prodrug of tegafur for co-delivery of chemotherapeutic agent tegafur and enhanced green fluorescent protein(EGFP) reporter plasmid *** of tegafur to PEI-CyD via chemical linkage was characterized by 1 H NMR spectrometry and ultraviolet(UV) ***-CyD-tegafur was able to condense plasmid DNA into complexes of around 150 nm with positive charge at the N/P ratio of 25,in accordance with electron microscopy observation of compact and monodisperse *** results of in vitro experiments showed enhanced cytotoxicity and considerable transfection efficiency in B16F10 cell ***,PEI-CyD-tegafur may have great potential as a co-delivery system with anti-cancer activity and potential for gene delivery.

关键词： Polyethylenimine β-Cyclodextrin Tegafur Co-delivery Gene therapy

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一种新型他达拉非衍生物的分离和鉴定

食品安全质量检测学报 2016年第7期7卷 2710-2714页

作者：冯睿于泓孙健胡青张甦毛秀红季申上海市食品药品检验所上海201203

目的分离、鉴定一种新型他达拉非衍生物的结构。方法在液相色谱-串联质谱法对保健食品"金博大"的日常检测中,发现了一种可能的他达拉非衍生物,通过高效液相制备该化合物,并通过紫外光谱、精确分子量及串联质谱的信息推测该化合物的结构... 详细信息

目的分离、鉴定一种新型他达拉非衍生物的结构。方法在液相色谱-串联质谱法对保健食品"金博大"的日常检测中,发现了一种可能的他达拉非衍生物,通过高效液相制备该化合物,并通过紫外光谱、精确分子量及串联质谱的信息推测该化合物的结构,经核磁共振及文献比对确证其结构。结果确证该化合物为2-羟乙基去甲基他达拉非(2-hydroxyethylnortadalafil),是一种新型的他达拉非衍生物。结论该化合物对人体可能产生的潜在危害认知较为有限,需引起关注。该类化合物的紫外及质谱行为规律可提供丰富的化合物信息,有助于新型衍生物结构的推测。

关键词：他达拉非衍生物 PDE-5抑制剂非法添加

Shaping and maintaining a medium-sized main channel in the Lower Yellow River

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International Journal of Sediment Research 2012年第3期27卷 259-270页

作者： Chun-hong hu jian-guo CHEN qing-chao GUO State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin(SKL-WAC) China Institute of Water Resources and Hydropower Research(IWHR) International Research and Training Center on Erosion and Sedimentation(IRTCES) IRTCES SKL-WAC IWHR

This paper studies relations between bankfull discharge,lateral cross section variation and the incoming flow and sediment condition in the Lower Yellow River using measured data from 1950 to *** 1950 the bankfull discharge has obviously decreased and the ratio of channel width to flow depth has *** critical annual average incoming sediment coefficient（defined as the ratio of sediment concentration to discharge） and discharge at the huayuankou station are approximately 0.012 and 1,850 m;s;,respectively,for no accumulative deposition occurring in the reach from huayuankou to *** this basis,a mathematical model is used to study the scale of the main channel in the Lower Yellow River and its corresponding bankfull discharge under possible incoming flow and sediment conditions in the near *** main factors influencing the scale of the main channel are analyzed,and measures to shape and maintain a medium-sized channel are *** results show the effect of various water and sediment combinations released from the Xiaolangdi Reservoir on the shaping of the main channel and suggest that under recent incoming flow and sediment conditions,it is possible to shape and maintain a medium-sized channel with a bankfull discharge of approximate 4,000 m;s;.

关键词： The Lower Yellow River Xiaolangdi Reservoir Bankfull discharge Medium size channel Flow and sediment condition