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IMPROVE THE KINETIC PERFORMANCE OF THE PUMP CONTROLLED CLAMPING UNIT IN PLASTIC INJECTION MOLDING MACHINE WITH ADAPTIVE CONTROL STRATEGY

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Chinese Journal of Mechanical Engineering 2006年第1期19卷 9-13页

作者： QUAN Long liu shiping Institute of Mechatronics Engineering Taiyuan University of Technology Taiyuan 030024 China Department of Mechanical Engineering North China Institute of Water Conservation and Hydroelectric Power Zhengzhou 450008 China

The kinetic characteristics of the clamping unit of plastic injection molding machine that is controlled by close loop with newly developed double speed variable pump unit are investigated. Considering the wide variation of the cylinder equivalent mass caused by the transmission ratio of clamping unit and the severe instantaneous impact force acted on the cylinder during the mold closing and opening process, an adaptive control principle of parameter and structure is proposed to improve its kinetic performance. The adaptive correlation between the acceleration feedback gain and the variable mass is derived. The pressure differential feedback is introduced to improve the dynamic performance in the case of small inertia and heavy impact load. The adaptation of sum pressure to load is used to reduce the energy loss of the system. The research results are verified by the simulation and experiment, The investigation method and the conclusions are also suitable for the differential cylinder system controlled by the traditional servo pump unit.

关键词： Adaptive control Pump controlled system Clamping unit Plastic injection molding machine

Computational Approaches and Challenges in Spatial Transcriptomics

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Genomics, Proteomics & Bioinformatics 2023年第1期21卷 24-47页

作者： Shuangsang Fang Bichao Chen Yong Zhang Haixi Sun Longqi liu shiping liu Yuxiang Li Xun Xu BGI-Shenzhen Shenzhen 518083China BGI-Beijing Beijing 100101China Guangdong Bigdata Engineering Technology Research Center for Life Sciences Shenzhen 518083China

The development of spatial transcriptomics(ST)technologies has transformed genetic research from a single-cell data level to a two-dimensional spatial coordinate system and facilitated the study of the composition and function of various cell subsets in different environments and *** large-scale data generated by these ST technologies,which contain spatial gene expression information,have elicited the need for spatially resolved approaches to meet the requirements of computational and biological data *** requirements include dealing with the explosive growth of data to determine the cell-level and gene-level expression,correcting the inner batch effect and loss of expression to improve the data quality,conducting efficient interpretation and in-depth knowledge mining both at the single-cell and tissue-wide levels,and conducting multi-omics integration analysis to provide an extensible framework toward the in-depth understanding of biological ***,algorithms designed specifically for ST technologies to meet these requirements are still in their ***,we review computational approaches to these problems in light of corresponding issues and challenges,and present forward-looking insights into algorithm development.

关键词： Spatial transcriptomics Computational approach Data quality Data interpretation Multi-omics integration

Prognosis of gestational choriocarcinoma diagnosed incidentally during laparoscopy for a presumed cornual pregnancy:a report of five cases

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Cancer Biology & Medicine 2017年第2期14卷 191-193页

作者： shiping liu Chenchen Fan Fengzhi Feng Yang Xiang Xirun Wan Tong Ren Peking University First Hospital Peking Union Medical College Hospital

The clinical presentations of gestational choriocarcinoma vary markedly, and a misdiagnosis could be made in atypical patients if simply relying on clinical features. Laparoscopic resection of uterine mass lesion is rarely used in gestational choriocarcinoma diagnosis because of the fear of heavy blood loss and distant metastasis. Five patients who were preoperatively diagnosed as having cornual pregnancy underwent laparoscopic resection of mass lesion and then proved to have gestational choriocarcinoma based on pathological examinations. Chemotherapy was started within two days after surgery, and the rate of complete remission was 100%. The mean follow-up time was 29.8±19.1 months, and no patient showed signs of relapse. Laparoscopic resection of uterine mass followed by timely postoperative chemotherapy may be an effective and safe way to obtain pathologic results in patients with suspected gestational choriocarcinoma.

关键词： Gestational choriocarcinoma cornual pregnancy laparoscopy

Construction of Phosphorus-Functionalized Multichannel Carbon Interlayers for Dendrite-Free Metallic Zn Anodes

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Energy & Environmental Materials 2024年第5期7卷 95-103页

作者： Liang He Qingyin Zhang He Li shiping liu Ting Cheng Ruoxuan Zhang Yujia Wang Peng Zhang Zhiqiang Shi Tianjin Key Laboratory of Advanced Fibers and Energy Storage School of Materials Science and EngineeringTiangong UniversityTianjin 300387China Cangzhou Institute of Tiangong University Cangzhou 061000China School of Chemical Engineering and Technology Tiangong UniversityTianjin 300387China Tianjin Lishen Battery Joint-Stock CO. LTDTianjin 300387China

Zn metal anodes are usually subject to grave dendrite growth during platting/stripping,which dramatically curtails the lifespan of aqueous Zn-ion batteries and *** address above problems,in our work,a novel phosphorus-functionalized multichannel carbon interlayer was designed and covered on Zn *** results demonstrated that the multichannel structure combined with the three-dimensional meshy skeleton can provide more sufficient space for Zn deposition,thereby effectively inhibiting the growth of zinc ***,theoretical calculations also confirmed that the P-C and P=O functional groups from phosphorus-functionalized multichannel carbon interlayer have the decisive influence in reducing the zinc nucleation potential and depositing uniformly ***,the symmetrical battery assembled with phosphorus-functionalized multichannel carbon interlayer-covered Zn anodes possessed a long lifetime of 3300 h at 2 mA cm^(-2)with 1 mAh cm^(-2).Furthermore,the full cell with activated carbon cathodes exhibited a high specific capacity of 80.5 mAh g^(-1)and outstanding cycling stability without capacity decay after 15000 cycles at a high current density of 5 A g^(-1).The superior electrochemical performance exceeded that of most reported ***,our synthesized zincophilic interlayer with the unique structure has superior prospects for application in stabilizing zinc anodes and prolonging the lifespan of batteries.

关键词： aqueous Zn-ion supercapacitors multichannel carbon fiber phosphorus functionalized Zn dendrite Zn metal anode

A Retrospective and Prospective Look at Human Rights Education in Chinese Universities and Colleges——A Simultaneous Discussion of the Basic Effects of Human Rights Education on the Human Rights Development Environment

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The Journal of Human Rights 2013年第6期12卷 5-8页

作者： liu shiping the Law School of Hunan University Hunan University Research and Education Center for Human Rights

1. The Role of Human Rights Education in Promoting Human Rights Development 1. Human rights education shapes the soft environment for human rights development

关键词： A Retrospective and Prospective Look at Human Rights Education in Chinese Universities and Colleges A Simultaneous Discussion of the Basic Effects of Human Rights Education on the Human Rights Development Environment

Production of β-1,3-glucanase and chitinase of two biocon-trol agents and their possible modes of action

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Chinese Science Bulletin 2002年第4期47卷 292-296页

作者： FAN Qing, TIAN shiping, liu Haibo & XU YongInstitute of Botany, Chinese Academy of Sciences, Beijing 100093, China Institute of Botany Chinese Academy of Sciences Beijing China

Pichia membranefaciens Hansen and Candida guilliermondii (Cast) Langeronet Guerra are two antagonists of R. stolonifer on harvested nectarine and peach fruits. In this study, β-1,3-glucanase and chitinase activities of the antagonists were induced in vitro and in vivo. The highest β-1, 3-glucanase activity was detected in Lilly-Barnett minimal salt medium supplemented with glucose in combination with CWP of R. stolonifer as a carbon source. The β-1,3-glucanase activity of P. membranefaciens reached the maximum level, being 114.0 SU (specific activity unit), and that of C. guilliermondii reached 103.2 SU. The lowest β-1,3-glucanase activity was observed in the medium containing glucose as sole car-bon source. P. membranefaciens was able to produce signifi-cantly higher levels of chitinase (exochitinase and endochiti-nase) in vitro than C. guilliermondii grown in Czapeck mini-mal medium. An increase in β-1,3-glucanase and chitinase activity was also triggered by wounding, adding of carbon sources

关键词： biological control yeast rhizopus rot β-1 3-glucanase chitinase.

MODELING AND IMPLEMENTATION OF A DISTRIBUTED SHOP FLOOR MANAGEMENT AND CONTROL SYSTEM

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Chinese Journal of Mechanical Engineering 2002年第3期15卷 213-217页

作者： liu shiping Rao Yunqing Zhang Jie Li PeigenSchool of Mechanical Science and Engineering, Huazhong University of Science and Technology,Wuhan 430074, China School of Mechanical Science and Engineering Huazhong University of Science and Technology Wuhan 430074

Adopting distributed control architecture is the important developmentdirection for shop floor management and control system, is also the requirement of making it agile,intelligent and concurrent. Some key problems in achieving distributed control architecture areresearched. An activity model of shop floor is presented as the requirement definition of theprototype system. The multi-agent based software architecture is constructed. How the core part inshop floor management and control system, production plan and scheduling is achieved. Thecooperation of different agents is illustrated. Finally, the implementation of the prototype systemis narrated.

关键词： Agent Shop floor management and control CIMS

Semi-Automatic Modeling Technique of Torque Converter Flow Passage

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Modern Mechanical Engineering 2013年第2期3卷 59-68页

作者： shiping liu Shujuan Zheng North China Institute of Water Conservancy and Hydro-Electric Power Zhengzhou China

The modeling technique of hydrodynamic torque converter flow passage was investigated. The semi-automatic modeling technique of torque converter flow passage was proposed. The flow passage model of each converter wheel is considered as a revolution entity sliced by two curved surfaces. In order to generate the revolution entity, a new approximation method, condition optimum arc approximation, was proposed. The method was used to approximate the meridional streamlines of the inner and outer wall. As a result, the three-dimensional revolution entity can be conveniently generated. In order to create slice surfaces, the central stream surface of flow passage was approximated with a quadric surface. The normal vector of the quadric surface and the thickness/thickness-function of bade were used to calculate the discrete point coordinates of blade surfaces. Via the rotation transformation to the coordinates, the discrete point coordinates of slice surfaces were obtained. A parameterized program code used for the hydrodynamic torque converter design and semi-automatic modeling was developed. Modeling errors were calculated and analyzed. The flow passage model was generated in several minutes with the help of the program code, Auto CAD and Solidworks software. Finally, the model was inputted into Gambit, and the pre-processing task used for the numerical simulation of torque converter flow field was successfully completed. The investigation results show that the semi-automatic modeling not only can ensure the accuracy of modeling, but also librates the research and design workers of torque converter from the time-consuming modeling work, which paves the way for the numerical simulation of the complex flow field of the hydrodynamic torque converter.

关键词： Hydrodynamic Torque Converter Flow Field Simulation Semi-Automatic Modeling Quadric Surface Condition Optimum Approximation

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三元件向心涡轮液力变矩器环面流线法设计

农业机械学报 2009年第7期40卷 20-24,44页

作者：刘仕平权龙太原理工大学机械电子研究所太原030024 华北水利水电学院机械系郑州450011

对三元件向心涡轮液力变矩器的设计方法进行了研究,提出了基于环面流线的设计方法。将流体质点在液力变矩器内部的运动看作为在环面上的曲线运动并可分解为轴面分量和周向分量,推导了轴面流线方程和环面流线方程。分析了叶片对于流线的... 详细信息

对三元件向心涡轮液力变矩器的设计方法进行了研究,提出了基于环面流线的设计方法。将流体质点在液力变矩器内部的运动看作为在环面上的曲线运动并可分解为轴面分量和周向分量,推导了轴面流线方程和环面流线方程。分析了叶片对于流线的影响,给出了流线型叶片厚度函数。将叶型骨线和叶片厚度函数相结合,得到了叶片表面的计算方程。研究结果表明,三元件向心涡轮液力变矩器的轴面流线和环面流线都比较接近抛物线。

关键词：液力变矩器叶片设计环面流线厚度函数