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Novel gripper module and method for automated assembly of miniature parts

Advances in Manufacturing 2023年第2期11卷 295-310页

作者： Zhi-yong Zhang xiao-Dong Wang Tong-Qun Ren tian-Lun Jin Key Laboratory for Micro/Nano Technology and System of Liaoning Province Dalian University of TechnologyDalian116024LiaoningPeople's Republic of China Key Laboratory for Precision and Non-traditional Machining of Ministry of Education Dalian University of TechnologyDalian116024LiaoningPeople's Republic of China

During assembly process,the miniature part needs to be fixed in its assembly *** some occasions where adhesive is used,the joining force is not established due to the adhesive curing process,in that case the locking of parts is *** locking is difficult to meet the increasing demand for mass *** solve this problem and realize fully automatic assembly,a novel gripper module was designed and corresponding locking method was *** to the functional integration,the gripper module is capable of manipulating and locking the *** module is integrated into the assembly system and plays a crucial role in automatic *** locking method for automatic assembly is based on the integration of the part picking up and the locking unit *** being placed accurately at its desired position,the miniature part can be automatically locked by releasing the locking *** innovative structure and mechanism of the gripper module convert the spring force into the locking force of the miniature part,ensuring non-rigid locking and suitable small locking *** principle,flexibility and limitations of the proposed method were clarified in ***,an effective compensation strategy was used to achieve accurate and stable pickup of the part,which increased the reliability of the assembly *** automatic locking,the disturbances to the part due to the eccentric load were *** effectiveness of the gripper module and proposed method was verified by *** results indicated that the modular system integrated with the gripper module could meet the requirements of fully automatic *** locking is replaced by automatic locking,and workers are liberated from tedious manual *** improvement of automation level enables assembly equipment to be applied to mass production scenarios.

关键词： Fully automatic assembly Miniature parts Automatic locking Gripper module

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Physical and numerical investigation on fluid flow and inclusion removal behavior in a single-strand tundish

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Journal of Iron and Steel Research International 2023年第6期30卷 1182-1198页

作者： Qi Quan Zhi-xiao Zhang tian-peng Qu Xiang-long Li Jun tian De-yong Wang School of Iron and Steel Soochow UniversitySuzhou 215137JiangsuChina

Aiming at the problem that the existence of inclusions in the tundish continuous casting process can easily lead to quality defects of the slab,the stainless steel continuous casting tundish was taken as the research *** effects of flow control device,inclusion density and inclusion size on the mixing characteristics of molten steel and inclusion behavior in tundish were *** results showed that compared with the tundish without flow control device,the average residence time of molten steel was prolonged by about 49 s,the dead zone volume fraction was reduced by 8.93%,and the piston fluid integral rate was increased by 12.68%.In the turbulence inhibitor(TI)tundish with weir-dam combination,the removal rate of inclusions with a density of 2700 kg m^(-3) and a particle size of 5 lm is 63.32%,while the removal rate of large inclusions with a density of 150μm could reach 89.04%.When the inclusion particle size was 10-50μm and the density was 2700-4500 kg m^(-3),the effect of inclusion density on inclusion removal rate was *** the same time,when weir-dam combination TI tundish was set,the inclusions were mainly limited to the slag-metal interface of the first and second chambers of the *** removal rate of inclusions in the first chamber was generally improved,with 10μm inclusions accounting for 47.67% and 150μm inclusions accounting for 60.69%.Furthermore,it has the best effect on the removal of small-size inclusions,especially those less than 70μm.

关键词： Non-metallic inclusion Flow control device Residence time distribution curve Removal behavior Discrete particle model

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Multi-site abdominal tuberculosis mimics malignancy on ^(18)F-FDG PET/CT:Report of three cases

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World Journal of Gastroenterology 2010年第33期16卷 4237-4242页

作者： Geng tian yong xiao Hong Guan Qun-YiDeng Bin Chen Department of Tumor Shenzhen Second People’s Hospital First Affiliated Hospital of Shenzhen University Shenzhen 518035 Guangdong Province China Department of Radiology Guangdong Frontier Defence Armed Police General Hospital Shenzhen 518032 China Department of General Surgery China Department of Pathology Shenzhen Second People’s HospitalFirst Af��liatedHospital of ShenzhenUniversityShenzhen 518035Guangdong ProvinceChina Department of Pneumology Shenzhen Third People’s HospitalShenzhen 518020Guangdong ProvinceChina

18 F-fluorodeoxyglucose positron emission/computed tomography( 18 F-FDG PET/CT)imaging,an established procedure for evaluation of malignancy,shows an increased 18 F-FDG uptake in inflammatory *** present three patients with abdominal pain and weight *** imaging studies indicated that abdominal neoplasm and 18 F-FDG PET/CT for assessment of malignancy showed multiple lesions with intense 18 FFDG uptake in abdomen of the three ***,the three patients were finally diagnosed wit...

关键词： Abdominal tuberculosis Differential diagno- sis

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Pre-hospital application of REBOA for life-threatening hemorrhage

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Military Medical Research 2024年第5期11卷 789-791页

作者： xiao-Mei tian Wei Hu Feng-yong Liu Department of Interventional Radiology Senior Department of Oncologythe Fifth Medical Center of Chinese PLA General HospitalBeijing100039China Medical School of Chinese PLA Beijing100853China Department of Emergency the Fifth Medical Center of Chinese PLA General HospitalBeijing100039China Senior Department of Infectious Diseases the Fifth Medical Center of Chinese PLA General HospitalNational Clinical Research Center for Infectious DiseasesBeijing100039China

Dear Editor,Most battlefield casualties occur prior to the arrival of medical *** hemorrhage accounts for more than 90%of those potentially survivable battlefield casualties[1].In both military and civilian conditions,non-compressible torso hemorrhage always caused rapid exsanguination and high mortality rates before definitive treatment[2].More than half of the deaths due to non-compressible torso hemorrhage occur before hospital care can be provided[2].Therefore,early and rapid pre-hospital hemorrhage control is essential to reduce mortality.

关键词： Resuscitative endovascular balloon occlusion of the aorta(REBOA) Pre-hospital Endovascular Aortic balloon occlusion Trauma Hemorrhage Shock

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Study on Adjoint-Based Optimization Method For Multi-Stage Turbomachinery

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Journal of Thermal Science 2011年第5期20卷 398-405页

作者： Weiwei Li yong tian Weilin Yi Lucheng Ji Weiwei Shao Yunhan xiao School of Aerospace Engineering Beijing Institute of Technology Beijing 100081 China Institute of Engineering Thermophysics Chinese Academy of Sciences Beijing 100190 China Graduate School of Chinese Academy of Sciences Beijing 100190 China

Adjoint-based optimization method is a hotspot in ***,this paper presents principles of adjoint method from Lagrange multiplier ***,combining a continuous route with thin layer RANS equations,we formulate adjoint equations and anti-physical boundary *** to the multi-stage environment in turbomachinery,an adjoint interrow mixing method is *** techniques of solving flow equations and adjoint equations are almost the same,and once they are converged respectively,the gradients of an objective function to design variables can be calculated using complex method ***,integrating a shape perturbation parameterization and a simple steepest descent method,a frame of adjoint-based aerodynamic shape optimization for multi-stage turbomachinery is *** last,an inverse design of an annular cascade is employed to validate the above approach,and adjoint field of an Aachen 1.5 stage turbine demonstrates the conservation and areflexia of the adjoint interrow mixing *** a direct redesign of a 1+1 counter-rotating turbine aiming to increase efficiency and apply constraints to mass flow rate and pressure ratio is taken.

关键词： adjoint method aerodynamic shape optimization multi-stage turbomachinery N-S equations

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An aerodynamic design and numerical investigation of transonic centrifugal compressor stage

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Journal of Thermal Science 2011年第3期20卷 211-217页

作者： Weilin Yi Lucheng Ji yong tian Weiwei Shao Weiwei Li Yunhan xiao School of Aerospace Engineering Beijing Institute of Technology Beijing 100081 China Research Center thr Energy and Power Chinese Academy of Sciences Beijing 100190 China

In the present paper,the design of a transonic centrifugal compressor stage with the inlet relative Mach number about 1.3 and detailed flow field investigation by three-dimensional CFD are *** the CFD program was validated by an experimental *** the preliminary aerodynamic design of stage completed through in-house one-dimensional *** types of impellers and two sets of stages were computed and *** can be found that the swept shape of leading edge has prominent influence on the performance and can enlarge the flow ***,the performance of the stage with swept impeller is better than *** total pressure ratio and adiabatic efficiency of final geometry achieve 7:1 and 80% *** vane diffuser with same airfoils along span increases attack angle at higher span,and the local flow structure and performance is deteriorated.

关键词： Impeller Diffuser CFD Aerodynamic Design

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Melanin synthesis genes BgTH and BgDdc affect body color and cuticle permeability in Blattella germanica

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Insect Science 2022年第6期29卷 1552-1568页

作者： tian-tian Bai xiao-Jin Pei Tong-Xian Liu yong-Liang Fan Shi-Ze Zhang State Key Laboratory of Crop Stress Biology for Arid Areas and Key Laboratory of lIntegrated Pest Management on Crops in Northwestern Loess Plateau Ministry of AgricultureNorthwest A&F UniversityYanglingShaanxiChina Present address:Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied Technology and Institute of Insect Science and Technology School of Life SciencesSouth China Normal UniversityGuangzhou510631China

Melanin is involved in cuticle pigmentation and sclerotization of insects,which is critical for maintaining structural integrity and functional completeness of insect *** 2 key enzymes of tyrosine hydroxylase(TH)and dopa decarboxylase(DDC)predicted in melanin biosynthesis are usually conserved in ***,it is unclear whether their function is related to epidermal *** this study,we identified and cloned the gene sequences of BgTH and BgDdc from Blattella germanica,and revealed that they both showed a high expression at the molting,and BgTH was abundant in the head and integument while BgDdc was expressed highest in the fat *** RNA in-terference(RNAi),we found that knockdown of BgTH caused molting obstacles in some cockroaches,with the survivors showing pale color and softer integuments,while knock-down of BgDdc was viable and generated an abnormal light brown body *** assay showed that the dsBgTH-injected adults died earlier than control groups under a dry atmosphere,but dsBgDdc-injected cockroaches did *** contrast,when dsRNA-treated cockroaches were reared under a high humidity condition,almost no cockroaches died in all ***,with eosin Y staining assay,we found that BgTH-RNAi resulted in a higher cuticular permeability,and BgDdc-RNAi also caused slight dye *** results demonstrate that BgTH and BgDdc function in body pigmentation and affect the waterproofing ability of the cuticle,and the reduction of cuticular perme-ability may be achieved through cuticle melanization.

关键词： cuticular permeability desiccation tolerance dopa decarboxylase German cockroach pigmentation tyrosine hydroxylase

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Chemical derivatization strategies for enhancing the HPLC analytical performance of natural active triterpenoids

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Journal of Pharmaceutical Analysis 2024年第3期14卷 295-307页

作者： xiao-Feng Huang Ying Xue Li yong tian-tian Wang Pei Luo Lin-Sen Qing Chengdu Institute of Biology Chinese Academy of SciencesChengdu610041China State Key Laboratory for Quality Research in Chinese Medicines Macao University of Science and TechnologyMacaoChina Sichuan Center for Disease Control and Prevention Chengdu610041China University of Chinese Academy of Sciences Beijing100049China

Triterpenoids widely exist in nature,displaying a variety of pharmacological *** triterpenoids in different matrices,especially in biological samples holds great ***-performance liquid chromatography(HPLC)has become the predominant method for triterpenoids analysis due to its exceptional analytical ***,due to the structural similarities among botanical samples,achieving effective separation of each triterpenoid proves challenging,necessitating significant improvements in analytical ***,triterpenoids are characterized by a lack of ultraviolet(UV)absorption groups and chromophores,along with low ionization efficiency in mass ***,routine HPLC analysis suffers from poor *** derivatization emerges as an indispensable technique in HPLC analysis to enhance its *** the structural characteristics of triterpenoids,various derivatization reagents such as acid chlorides,rhodamines,isocyanates,sulfonic esters,and amines have been employed for the derivatization analysis of *** review comprehensively summarized the research progress made in derivatization strategies for HPLC detection of ***,the limitations and challenges encountered in previous studies are discussed,and future research directions are proposed to develop more effective derivatization methods.

关键词： Triterpenoid HPLC Derivatization Quantification

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Separation of Oil from Wastewater by Column Flotation

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Journal of China University of Mining and Technology 2007年第4期17卷 546-551,577页

作者： LI xiao-bing LIU Jiong-tian WANG yong-tian WANG Cun-ying ZHOU xiao-hua School of Chemical Engineering and Technology China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China School of Resource and Civil Engineering Northeastern University Shenyang Liaoning 110004 China Xuzhou College of lndustrial Technology Xuzhou Jiangsu 221006 China Department of Mining Engineering University of Kentucky Lexington KY 40506 USA

A new type of device,a dissolved-air flotation column,was developed for separation of oily wastewater. The unique design idea of the dissolved-air flotation column is the combined use of dissolved-air flotation and column flotation. The dissolved air release occurred within the column separation system. As a potential application the column was investigated for its performance in separating emulsified oil droplets in oily wastewater. A high separation efficiency was obtained in a series of tests. The aeration performance of the bubble generator used in the dissolved-air flotation column was also studied in particular.

关键词： oily wastewater separation flotation bubbles generator dissolved-air flotation column

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爆炸切割网络传爆中的间隙与角度效应

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火工品 2025年第1期 37-43页

作者：周晓鹏姜勇袁航中国船舶集团有限公司第七一三研究所河南郑州450015 河南省水下智能装备重点实验室河南郑州450015

为研究爆炸切割网络中传爆节点处传爆能力的关键影响因素,通过改变切割索对传爆药柱的传爆间隙进行了平板传爆试验,将试验结果结合仿真分析确定了JO-11C传爆药柱的仿真材料参数,并进一步分析了传播角度对传爆能力的影响。研究结果表明:... 详细信息

为研究爆炸切割网络中传爆节点处传爆能力的关键影响因素,通过改变切割索对传爆药柱的传爆间隙进行了平板传爆试验,将试验结果结合仿真分析确定了JO-11C传爆药柱的仿真材料参数,并进一步分析了传播角度对传爆能力的影响。研究结果表明:随着传爆间隙的增加,传爆能力下降,切割索对传爆药柱的最大传爆间隙区间为2.0~2.5 mm;同时,传爆角度的增大能够显著提高传爆能力。本研究为爆炸切割网络的传爆性能研究以及提高武器系统的可靠性提供了参考。

关键词：爆炸切割网络传爆间隙传爆角度传爆药柱仿真分析

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