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Simulation of Gas Flow Field in Laval Nozzle and Straight Nozzle for Powder Metallurgy and Spray Forming

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Journal of Iron and Steel Research International 2008年第6期15卷 44-47页

作者： li zheng-dong ZHANG Guo-qing li Zhou ZHANG Yong XU Wen-yong National Key Laboratory of High Temperature Structural Materials Beijing Institute of Aeronautical Materials Beijing 100095 China

Gas flow field in nozzles and out of nozzles was calculated for Laval orifice and straight orifice nozzles. The results showed that the flow generated by the Laval nozzle had a higher exit velocity in the vicinity of the nozzle, in comparison with that of the straight nozzle, that is to say, a Laval nozzle was more efficient than a straight one in disintegrating the melt stream and was apt to produce finer powders. The flow generated by the Laval nozzle was less convergent and the velocity gradient along the radial direction was more moderate than that of a straight nozzle, which could contribute to a broad distribution of melt particles. According to their flow characteristics, the Laval nozzle was reckoned as a better choice of producing larger spray-formed billets.

关键词： numerical simulation computational fluid dynamics gas flow field atomization nozzle

Very high upper critical fields of F-doped Fe-based layered superconductors NdO_(0.88)F_(0.12)FeAs and CeO_(0.88)F_(0.12)FeAs

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Science China(Physics,Mechanics & Astronomy) 2008年第6期51卷 715-718页

作者： WU Dan, li zheng, SU ShaoKui, dong Jing, li Gang, HU Wanzheng, zheng Ping, CHEN GenFu, LUO Jianlin & WANG Nanlin Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China 1. Institute of Physics Chinese Academy of Sciences Beijing 100190 China

Using the solid state reaction method, we have synthesized the polycrystalline F-doped NdO0.88F0.12FeAs and CeO0.88F0.12FeAs with the superconducting transition temperatures at about 48 and 40 K, respectively. To obtain the upper critical field Hc2 of Nd(Ce)O0.88F0.12FeAs samples, we measured the electrical resistivity under magnetic field up to 14 T. Based on the Werthamer-Helfand-Hohenberg (WHH) rela-tion together with the Hc2(T) curves in a relatively high field, we estimated that these superconductors have a rather high upper critical field of about 115 T for Nd-based and 107 T for Ce-based samples, indicating the similarities between these ReO1-xFxFeAs (Re = rare earth element) superconductors and high Tc cuprate su-perconductors.

关键词： upper critical field Fe-based superconductor

Efficient synthesis of hydroxyl functioned polyesters from natural polyols and sebacic acid

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Chinese Chemical Letters 2011年第6期22卷 635-638页

作者： Zhuo Yuan Ning Qing Shan Zhang Qin Pei Wu Yun zheng li dong Xia Ma Jia Zhe Chen School of Chemical Engineering and Environment Beijing Institute of TechnologyBeijing 100081China

Amphiphilic hydroxyl functioned polyester（HFP） can be used as compatibilizers for blends of starch and *** developed a synthetic method for effective preparation of *** was removed by high flow rate N_2 rather than high vacuum during polycondensation of sebacic acid with xylitol,sorbitol,or mannitol in the presence of dehydrative condensation catalyst and the product is with[η]of 27.2 mL/g,M_n of 1903,M_w of 167,693,T_g of -30.5℃,T_m of 44.0℃.Weight loss is 1.73%under 200℃. The integral distributions of molecular weight are 43.6 wt%and 63.8 wt%over 10,000 and 3000,*** results indicated that higher molecular weight HFP was economically synthesized.

关键词： Hydroxyl functioned polyester Poly(sorbitol sebacate) Dehydrative condensation catalyst Biodegradable plastics

Relationship between Structure and SHG Effect of Substituted Thienyl Chalcone

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Chinese Journal of Structural Chemistry 1997年第4期16卷 263-266页

作者： SU Gen-Bo HE You-Ping li zheng-dong(Fujian Institute of Research on the Structure of Matter,the Chinese Academy of Sciences, Fuzhou 350002) 中科院福建物质结构所福建福州

The SHG effects of substituted 3-thienyl chalcone compounds weremeasured. The relationship between structure and effect of substituted 3-thienyl chal-cone derivatives and substituted 2-thienyl chalcone derivatives were discussed. It isshown that their properties of high SHG efficient are similar to each other and the sub-stituted 3-thienyl chalcone molecules are easier to form non-centrosymmetric crystalstructure than substituted 2-thienyl chalcone molecules.

关键词： crystal structure SHG effect thienyl chalcone

CNKSR2 interactome analysis indicates its association with the centrosome/microtubule system

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Neural Regeneration Research 2025年第8期20卷 2420-2432页

作者： lin Yin Yalan Xu Jie Mu Yu Leng Lei Ma Yu zheng Ruizhi li Yin Wang Peifeng li Hai Zhu dong Wang Jing li Institute for Translational Medicine The Affiliated Hospital of Qingdao UniversityMedical CollegeQingdao UniversityQingdaoShandong ProvinceChina School of Basic Medicine Qingdao UniversityQingdaoShandong ProvinceChina College of life Sciences and School of PharmacyMedical CollegeQingdao UniversityQingdaoShandong ProvinceChina Department of Urology Qingdao Municipal Hospital Affiliated to Qingdao UniversityQingdaoShandong ProvinceChina

The protein connector enhancer of kinase suppressor of Ras 2(CNKSR2),present in both the postsynaptic density and cytoplasm of neurons,is a scaffolding protein with several protein-binding *** of the CNKSR2 gene have been implicated in neurodevelopmental disorders,particularly intellectual disability,although the precise mechanism involved has not yet been fully *** has demonstrated that CNKSR2 plays a role in facilitating the localization of postsynaptic density protein complexes to the membrane,thereby influencing synaptic signaling and the morphogenesis of dendritic ***,the function of CNKSR2 in the cytoplasm remains to be *** this study,we used immunoprecipitation and high-resolution liquid chromatography-mass spectrometry to identify the interactors of *** a combination of bioinformatic analysis and cytological experiments,we found that the CNKSR2 interactors were significantly enriched in the proteome of the *** also showed that CNKSR2 interacted with the microtubule protein DYNC1H1 and with the centrosome marker *** colocalization analysis confirmed the centrosomal localization of *** we downregulated CNKSR2 expression in mouse neuroblastoma cells(Neuro 2A),we observed significant changes in the expression of numerous centrosomal *** manipulation also affected centrosome-related functions,including cell size and shape,cell proliferation,and ***,we found that CNKSR2 interactors were highly enriched in de novo variants associated with intellectual disability and autism spectrum *** findings establish a connection between CNKSR2 and the centrosome,and offer new insights into the underlying mechanisms of neurodevelopmental disorders.

关键词： autism spectrum disorder centrosome CNKSR2 intellectual disability interactome mass spectrometry microtubule neurodevelopmental disease protein complexes protein-protein interactions

Low-temperature chlorination roasting technology for the simultaneous recovery of valuable metals from spent liCoO_(2)cathode material

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 80-91页

作者： Junjie Shi Changle Hou Jingjing dong dong Chen Jianzhong li Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education) Northeastern UniversityShenyang 110819China School of Metallurgy Northeastern UniversityShenyang 110819China

With the continuous increase in the disposal volume of spent lithium-ion batteries(liBs),properly recycling spent liBs has become essential for the advancement of the circular *** study presents a systematic analysis of the chlorination roasting kinetics and proposes a new two-step chlorination roasting process that integrates thermodynamics for the recycling of liB cathode *** activation energy for the chloride reaction was 88.41 kJ/mol according to thermogravimetric analysis–derivative thermogravimetry data obtained by using model-free,model-fitting,and Z(α)function(αis conversion rate).Results indicated that the reaction was dominated by the first-order(F1)model when the conversion rate was less than or equal to 0.5 and shifted to the second-order(F2)model when the conversion rate exceeded *** conditions were determined by thoroughly investigating the effects of roasting temperature,roasting time,and the mass ratio of NH_(4)Cl to liCoO_(2).Under the optimal conditions,namely 400℃,20 min,and NH_(4)Cl/liCoO_(2)mass ratio of 3:1,the leaching efficiency of li and Co reached 99.43% and 99.05%,*** of the roasted products revealed that valuable metals in liCoO_(2)transformed into CoCl_(2) and ***,the reaction mechanism was elucidated,providing insights for the establishment of a novel low-temperature chlorination roasting technology based on a crystal structure *** technology can guide the development of liB recycling processes with low energy consumption,low secondary pollution,high recovery efficiency,and high added value.

关键词： spent lithium-ion battery thermodynamics chlorination roasting kinetics circular economy

EFFECTS OF STRUCTURE ON GROWTH HABITS AND DEFECTIVE FORMATION IN CRYSTAL OF TRI-HYDROXYMETHYLAMINO-METHANE(TAM)

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Chinese Journal of Structural Chemistry 1990年第3期 230-235页

作者： Zhao Qing-Lan Huang Yi-Sen lin Xian-Ti li zheng-dong Fujian Institute of Research an the Structure of Matter,Academia SinicatFuzhau,350002

The effects of structure on the growth habits and defective formation in the crystal of Tri-hydroxymethylaminomethane(TAM) have been studied experimentally and structurally. Dependence of orientations and properties in O - H...O and O - H....N hydrogen bridges on the polar growth and on the face development, and relationship between the structural channels in open structure and defective formation, have been dis cussed briefly.

关键词： TAM EFFECTS OF STRUCTURE ON GROWTH HABITS AND DEFECTIVE FORMATION IN CRYSTAL OF TRI-HYDROXYMETHYLAMINO-METHANE

The multi-agent means for sustainable system research

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The multi-agent means for sustainable system research

The Electromagnetically Induced Transparency of Quasi-A-type Four-level Atom System at Low light Levels

第二十三届中国控制会议

作者： Du ying, li zheng (dong Hua University, shanghai, 200051)

＜正＞ This paper starts with analyzing the relationship between complexity research and urban sustainable development, approaches the possibility of CAS and SWARM in supporting urban sustainable development research, raises the composing way of sustainable complex system for sustainable development based on multi-agent and the key technique to it.

关键词： CAS Swarm agent sustainable development

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量子光学学报 2006年第B8期12卷 81-81页

作者： li-ying Zhang zheng-dong liu Jun Chen Institute of Modern Physics Nanchang University Nanchang 33004 China