检索结果-南通市图书馆

Novel intelligent reasoning system for tool wear prediction and parameter optimization in intelligent milling

在线全文

学校读者我要写书评

暂无评论

Advances in Manufacturing 2024年第1期12卷 76-93页

作者： Long-Hua Xu Chuan-Zhen Huang Zhen Wang Han-Lian Liu shui-quan Huang Jun Wang School of Mechanical Engineering Yanshan UniversityQinhuangdao066004HebeiPeople’s Republic of China Center for Advanced Jet Engineering Technologies(CaJET) Key Laboratory of High-efficiency and Clean Mechanical Manufacture(Ministry of Education)National Experimental Teaching Demonstration Center for Mechanical Engineering(Shandong University)School of Mechanical EngineeringShandong UniversityJinan250061People’s Republic of China Institute of Manufacturing Technology Guangdong University of TechnologyGuangzhou510006People’s Republic of China

Accurate intelligent reasoning systems are vital for intelligent *** this study,a new intelligent reasoning system was developed for milling processes to accurately predict tool wear and dynamically optimize machining *** developed system consists of a self-learning algorithm with an improved particle swarm optimization(IPSO)learning algorithm,prediction model determined by an improved case-based reasoning(ICBR)method,and optimization model containing an improved adaptive neural fuzzy inference system(IANFIS)and *** results showed that the IPSO algorithm exhibited the best global convergence *** ICBR method was observed to have a better performance in predicting tool wear than standard CBR *** IANFIS model,in combination with IPSO,enabled the optimization of multiple objectives,thus generating optimal milling *** paper offers a practical approach to developing accurate intelligent reasoning systems for sustainable and intelligent manufacturing.

关键词： Improved particle swarm optimization(IPSO)algorithm Improved case-based reasoning(ICBR)method Adaptive neural fuzzy inference system(ANFIS)model Tool wear prediction Intelligent manufacturing

Synthesis and Crystal Structure of Nd_2Si_2O_7 in Low Temperature Form

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 1997年第3期16卷 177-180页

作者： CHI Li-Sheng CHEN Hua-Yang deng shui-quan ZHUANG Hong-Hui HUANG Jin-Shun(State Key Laboratory of Structural Chemistry, Fujian Institute of Research on theStructure of Matter, the Chinese Academy of Sciences, Fuzhou 350002, China) State Key Lab. of Struct. Chemistry Fujian Inst. Res. Struct. of Matter Chinese Academy of Sciences Fuzhou 350002 China

The title compound was obtained by high temperature solid state reaction and flux method. The crystal belongs to tetragonal system, space group P41, withcell dimensions a= 6. 738(2), c= 24. 532 (3) A, V= 1113. 8(3) A 3, Z= 8, Mr =456. 65, Dc= 5. 45 g/cm3, F(000) = 1632, μ= 189. 3 cm-1. R=0.052, Rw=0. *** structure consists of isolated Si2O7 double tetrahedra which are arranged in layersperpendicular to the c axis. Four crystallographically different rare earth atoms in oneunit cell are located on each side of the layers and connect the four nearest SiO4 tetrahedra to form a three-dimensional network structure.

关键词： crystal structure rare earth disilicate

Synthesis and Crystal Structure of MnSm4（SiO4）3O

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 1996年第2期15卷 113-116页

作者： Chi Li-Sheng deng shui-quan Zhuang Hong-Hui Huang Jin-Shun (State Hey laboratory of Structural Chemistry,Fujian institute of Research on the Structure of Matter,Chinese Academy of Scimces,Fuzhou,Fujian 350002,P.R.China) State Key Lab. of Struct. Chemistry Fujian Inst. Res. Struct. of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 China

ＳｙｎｔｈｅｓｉｓａｎｄＣｒｙｓｔａｌＳｔｒｕｃｔｕｒｅｏｆＭｎＳｍ４（ＳｉＯ４）３Ｏ￥ＣｈｉＬｉ－Ｓｈｅｎｇ；ＤｅｎｇＳｈｕｉ－Ｑｕａｎ；ＺｈｕａｎｇＨｏｎｇ－Ｈｕｉ；ＨｕａｎｇＪｉｎ－Ｓｈｕｎ；(ＳｔａｔｅＨｅｙ... 详细信息

ＳｙｎｔｈｅｓｉｓａｎｄＣｒｙｓｔａｌＳｔｒｕｃｔｕｒｅｏｆＭｎＳｍ４（ＳｉＯ４）３Ｏ￥ＣｈｉＬｉ－Ｓｈｅｎｇ；ＤｅｎｇＳｈｕｉ－Ｑｕａｎ；ＺｈｕａｎｇＨｏｎｇ－Ｈｕｉ；ＨｕａｎｇＪｉｎ－Ｓｈｕｎ；(ＳｔａｔｅＨｅｙｌａｂｏｒａｔｏｒｙｏｆＳｔｒ?..

关键词： rare earth compound apatite analog crystal structure

Unique method for removal of knotted lumbar epidural catheter: A case report

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2024年第10期12卷 1824-1829页

作者： Nian-Hua deng Xiao-Cong Chen Shou-Bo quan Anesthesia and Surgery Center Dongguan Songshan Lake Central HospitalDongguan 523326Guangdong ProvinceChina

BACKGROUND Combined spinal-epidural(CSE)anesthesia is the preferred anesthesia method for cesarean *** use of an epidural catheter is essential for administering additional drugs intraoperatively and managing postoperative ***,the insertion of epidural catheters is associated with various complications,such as total spinal anesthesia,symptoms indicative of spinal nerve root irritation,and challenges in epidural catheter *** SUMMARY We present a case report of a challenging epidural catheter removal due to *** lumbar computed tomography scan results revealed that the catheter formed a tight knot in the epidural *** used a novel extubation method and successfully removed the *** The operator can use opposite forces to"spiral"apart the spinal joints by positioning the patient's body in a specific *** findings indicate that,when combined with imaging examination results,this method is effective for the removal of epidural catheters.

关键词： Epidural catheter Knotting Challenging extubation Case report

An open chain product in the reaction of benzil with thiocarbohydrazide

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 1994年第3期12卷 270-276页

作者： deng, shui-quan HUANG, Xiao-Yin ZHUANG, Hong-HuiHUANG, Jin-LingState Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, ChinaLIN, Zhen-GuangDepartment of Chemistry, Fujian Teachers’ University, Fuzhou, Fujian 350007, China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 China Department of Chemistry Fujian Teachers' University Fuzhou Fujian 350007 China

An open chain compound was obtained by reaction of benzil with thiocarbohy-drazide in acidic condition. Its derivative, namely, benzil bis-(5-isopropylidene-3-thiocarbohydrazone) has been structurally characterized by X-ray single crystal diffraction method. Crystallographic data: C22H26N8S2, Mr=466.62, monoclinic, space group C2/c, a=12.215(3), b=11.473(2), c=17.032 (3)A, B=98.96(2)0, V=2357.7(9)A3, Z=4, Dc=1.32 g/cm3, F(000)=1040, u(Mo Ka)=2.43 cm-1. Final R=0.050, Rw=0.061 for 1103 unique and observed reflections with I> 3o(I). The effect of the structures on the formation of the open-chain intermediates during the cyclization of (2:2) Schiff base macrocyclic compound has been discussed and a possible mechanism for the ring closure has been suggested.

关键词： Thiocarbohydrazide Schiff base open-chain intermediate.

A new interacting capillary bundle model on the multiphase flow in micropores of tight rocks

在线全文

学校读者我要写书评

暂无评论

Petroleum Science 2024年第2期21卷 1099-1112页

作者： Wen-quan deng Tian-Bo Liang Wen-Zhong Wang Hao Liu Jun-Lin Wu Fu-Jian Zhou National Key Laboratory of Petroleum Resources and Engineering China University of Petroleum(Beijing)Beijing102249China

Surfactants are widely used in the fracturing fluid to enhance the imbibition and thus the oil recovery rate. However, current numerical models cannot capture the physics behind capillary imbibition during the wettability alteration by surfactants. Although the interacting capillary bundle(ICB) model shows potential in characterizing imbibition rates in different pores during wettability alteration, the existing ICB models neglect the influence of wettability and viscosity ratio on the imbibition behavior, making it difficult to accurately describe the oil-water imbibition behavior within the porous media. In this work,a new ICB mathematical model is established by introducing pressure balance without assuming the position of the leading front to comprehensively describe the imbibition behavior in a porous medium under different conditions, including gas-liquid spontaneous imbibition and oil-water *** the pore size distribution of a tight rock is known, this new model can predict the changes of water saturation during the displacement process in the tight rock, and also determine the imbibition rate in pores of different sizes. The water saturation profiles obtained from the new model are validated against the waterflooding simulation results from the CMG, while the imbibition rates calculated by the model are validated against the experimental observations of gas-liquid spontaneous imbibition. The good match above indicates the newly proposed model can show the water saturation profile at a macroscopic scale while capture the underlying physics of the multiphase flow in a porous medium at a microscopic scale. Simulation results obtained from this model indicate that both wettability and viscosity ratio can affect the sequence of fluid imbibition into pores of different sizes during the multiphase flow, where less-viscous wetting fluid is preferentially imbibed into larger pores while more-viscous wetting fluid tends to be imbibed into smaller pores. Fur

关键词： Imbibition Multiphase flow Tight rock Interacting capillary bundle model Wettability

Asymmetric Two-Component Alkenyl Catellani Reaction for the Construction of C—N Axial Chirality

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2024年第7期42卷 699-704页

作者： Chenggui Wu Ze-shui Liu Yong Shang Chang Liu Shuang deng Hong-Gang Cheng Hengjiang Cong Yinchun Jiao Qianghui Zhou Sauvage Center for Molecular Sciences Engineering Research Center of Organosilicon Compounds&Materials(Ministry of Education)Hubei Key Lab on Organic and Polymeric OptoElectronic MaterialsCollege of Chemistry and Molecular SciencesThe Institute for Advanced Studiesand TaiKang Center for Life and Medical SciencesWuhan UniversityWuhanHubei 430072China Key Laboratory of Xin'an Medicine Ministry of EducationAnhui University of Chinese MedicineHefeiAnhui 230038China School of Chemistry and Chemical Engineering Hunan University of Science and TechnologyXiangtanHunan 411201China

Herein,we report an asymmetric two-component alkenyl Catellani reaction for the construction of C—N axial chirality through a palladium/chiral norbornene cooperative catalysis and an axial-to-axial chirality transfer *** partially aromatic iodinated 2-pyridones,quinolones,coumarin and uracil substrates react with 2,6-disubstituted aryl bromides with a tethered amide group,to afford a wide variety of polycyclic C—N atropisomers(38 examples,up to 97%e.e.).The obtained C—N axial chirality originates from the preformed transient C—C axial chirality with high *** synthetic utility of this chemistry is demonstrated by facile prepa-ration of complex quinoline and pyridine based C—N atropisomers through a N-deprotection and aromatization *** addi-tion,a remote axial-to-central diastereoinduction process dictated by C—N axial chirality is observed with excellent diastereocontrol.

关键词： Alkenyl Catellani reaction Asymmetric catalysis Atropisomerism Axial-to-axial chirality transfer Heterocycles

Synthesis　and　Crystal　Structure　of　△~6－4－Amino－5，6－diphenyl－5－hydroxy－1，2，4－triaza－cyclohexene－3－thione－monohydrate

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 1994年第1期13卷 40-44页

作者： Lin Zhen-Guang deng shui-quan Huang Xiao-Yin Lu Can-Zhong Zhuang Hong-Hui(Author to whom all correspondence should be addressed)(State Key Laboratory of Structural Chemistry,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sci

The title compound C（15）H（14）N4OS·H2O crystallizes in the monoclinic system, space group P21/a, with a=8. 733（3） , b= 16. 731 （4） , c=10. 476（4） A,β= 95. 41（3） °, V = 1523. 7（8） A￣3, Dc=1. 38 g/cm￣3, Z = 4,Mr= 316. 38,λ（MoKα） = 0. 71069 A, F（000） = 664,μ= 2.14 cm-1, T= 296K. Final R=0. 054,and Rω=0.063 for 1279 reflections with I≥3σ（I）. The parent structure of the molecule is a distorted six-membered ring. The effect of the steric hindrance between the two phenyls on the conjugate interactions in the heterocyclic ring has been discussed.

关键词： synthesis condensation reaction crystal structure Skiff-Base heterocyclic Compound

Lossless Compression Method for the Magnetic and Helioseismic Imager(MHI)Payload

在线全文

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2024年第4期24卷 214-221页

作者： Li-Yue Tong Jia-Ben Lin Yuan-Yong deng Kai-Fan Ji Jun-Feng Hou quan Wang Xiao Yang National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China Key Laboratory of Solar Activity and Space Weather National Space Science CenterChinese Academy of SciencesBeijing 100190China School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 100049China Yunnan Observatories Chinese Academy of SciencesKunming 650216China

The Solar Polar-orbit Observatory(SPO),proposed by Chinese scientists,is designed to observe the solar polar regions in an unprecedented way with a spacecraft traveling in a large solar inclination angle and a small ***,one of the most significant challenges lies in ultra-long-distance data transmission,particularly for the Magnetic and Helioseismic Imager(MHI),which is the most important payload and generates the largest volume of data in *** this paper,we propose a tailored lossless data compression method based on the measurement mode and characteristics of MHI *** background out of the solar disk is removed to decrease the pixel number of an image under *** predictive coding methods are combined to eliminate the redundancy utilizing the correlation(space,spectrum,and polarization)in data set,improving the compression *** results demonstrate that our method achieves an average compression ratio of *** compression time is also less than the general observation *** method exhibits strong feasibility and can be easily adapted to MHI.

关键词： methods:data analysis techniques:image processing Sun:magnetic fields Sun:photosphere