检索结果-南通市图书馆

The Ductile to Brittle Transition Behavior of the Modified 9cr-1Mo Steel and Its Laser Welds

在线全文

学校读者我要写书评

暂无评论

材料导报 2004年第8期18卷 121-123页

作者： h.c.wu R.K.Shiue c.chen DepartmentofMaterialsScienceandEngineering TaiwanUniversityTaipei106ChinaTaiwan DepartmentofMaterialsScienceandEngineering DongHwaUniversityHualien974ChinaTaiwan

The ductile to brittle transition temperature (DBTT) of the modified 9cr-1Mo steel and its laser welds was studied. The increase in grain size of the weld structure ascended the DBTT of the steel significantly. The transformation of retained austenite at martensite interlath boundaries into untempered and/or twinned martensite could also contribute to increased DBTTs of the steel and its welds tempered at 540℃.

关键词： 9cr-1Mo钢激光焊接 DBTT 冲击韧性

The Ductile to Brittle Transition Behavior of the Modified 9cr-1Mo Steel and Its Laser Welds

在线全文

学校读者我要写书评

暂无评论

The Ductile to Brittle Transition Behavior of the Modified 9...

The Lobster Eye Imager for Astronomy Onboard the SATech-01 Satellite

海峡两岸第二届工程材料研讨会

作者： h.c.wu R.K.Shiue c.chen Department of Materials Science and Engineering Taiwan University Taipei 106 China Taiwan Department of Materials Science and Engineering Dong Hwa University Hualien 974 China Taiwan Department of Materials Science and Engineering Taiwan University Taipei 106 China Taiwan

关键词： modified 9cr-1Mo steel laser welding impact toughness ductile to brittle transition temperature

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2023年第9期23卷 66-78页

作者： Z.X.Ling X.J.Sun c.Zhang S.L.Sun G.Jin S.N.Zhang X.F.Zhang J.B.chang F.S.chen Y.F.chen Z.W.cheng W.Fu Y.X.han h.Li J.F.Li Y.Li Z.D.Li P.R.Liu Y.h.Lv X.h.Ma Y.J.Tang c.B.Wang R.J.Xie Y.L.Xue A.L.Yan Q.Zhang c.Y.Bao h.B.cai h.Q.cheng c.Z.cui Y.F.Dai D.W.Fan h.B.hu J.W.hu M.h.huang Z.Q.Jia c.c.Jin D.Y.Li J.Q.Li h.Y.Liu M.J.Liu Y.Liu h.W.Pan Y.L.Qiu M.Sugizaki h.Sun W.X.Wang Y.L.Wang Q.Y.wu X.P.Xu Y.F.Xu h.N.Yang X.Yang B.Zhang M.Zhang W.D.Zhang Z.Zhang D.h.Zhao X.Q.cong B.W.Jiang L.h.Li X.B.Qiu J.N.Sun D.T.Su J.Wang c.wu Z.Xu X.M.Yang S.K.Zhang Z.Zhang N.Zhang Y.F.Zhu h.Y.Ban X.Z.Bi Z.M.cai W.chen X.chen Y.h.chen Y.cui X.L.Duan Z.G Feng Y.Gao J.W.he T.he J.J.huang F.Li J.S.Li T.J.Li T.T.Li h.Q.Liu L.Liu R.Liu S.Liu N.Meng Q.Shi A.T.Sun Y.M.Wang Y.B.Wang h.c.wu D.X Xu Y.Q Yang Y.Yang X.S.Yu K.X.Zhang Y.L.Zhang Y.h.Zhang Y.T.Zhang h.Zhou X.c.Zhu J.S.cheng L.Qin L.Wang Q.L.Wang M.Bai R.L.Gao Z.Ji Y.R.Liu F.L.Ma Y.J.Shi J.Su Y.Y.Tan J.Z.Tong h.T.Xu c.B.Xue G.F.Xue W.Yuan National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 100049China Shanghai Institute of Technical Physics Chinese Academy of SciencesShanghai 200083China North Night Vision Technology co. LTDNanjing 211106China Institute of high Energy Physics Chinese Academy of SciencesBeijing 100049China Science and Technology on Low-Light-Level Night Vision Laboratory Xi'an 710065China Innovation Academy for Microsatellites Chinese Academy of SciencesShanghai 201204China Institute of Electrical Engineering Chinese Academy of ScienceBeijing 100190China National Space Science center Chinese Academy of ScienceBeijing 100190China

The Lobster Eye Imager for Astronomy(LEIA),a pathfinder of the Wide-field X-ray Telescope of the Einstein Probe mission,was successfully launched onboard the SATech-01 satellite of the chinese Academy of Sciences on2022 July *** this paper,we introduce the design and on-ground test results of the LEIA *** stateof-the-art Micro-Pore Optics(MPO),a wide field of view of 346 square degrees(18.6°×18.6°)of the X-ray imager is *** optical assembly composed of 36 MPO chips is used to focus incident X-ray photons,and four large-format complementary metal-oxide semiconductor(cMOS)sensors,each of size 6 cm×6 cm,are used as the focal plane *** instrument has an angular resolution of 4’-8’(in terms of FWhM)for the central focal spot of the point-spread function,and an effective area of 2-3 cm^(2) at 1 keV in essentially all the directions within the field of *** detection passband is 0.5-4 keV in soft X-rays and the sensitivity is2-3×10^(-11) erg s^(-1) cm^(-2)(about 1 millicrab)with a 1000 s *** total weight of LEIA is 56 kg and the power is 85 *** satellite,with a design lifetime of 2 yr,operates in a Sun-synchronous orbit of 500 km with an orbital period of 95 *** is paving the way for future missions by verifying in flight the technologies of both novel focusing imaging optics and cMOS sensors for X-ray observation,and by optimizing the working setups of the instrumental *** addition,LEIA is able to carry out scientific observations to find new transients and to monitor known sources in the soft X-ray band,albeit with limited useful observing time available.

关键词： instrumentation detectors-space vehicles instruments-telescopes-X-rays genera

Regulation of thermoelastic properties of concave-packaged DNA adsorption films and its relevant microcantilever detection signals

在线全文

学校读者我要写书评

暂无评论

Acta Mechanica Sinica 2021年第4期37卷 705-711,I0004页

作者： c.X.wu N.h.Zhang c.Y.Zhang J.Z.wu School of Mechanics and Engineering Science Shanghai UniversityShanghai 200444China Shanghai Key Laboratory of Mechanics in Energy Engineering Shanghai Institute of Applied Mathematics and MechanicsShanghai 200072China

The packing patterns have close correlation with the thermoelastic properties of DNA adsorption films and the relevant detection signals of *** this paper,we investigate the influence of packing patterns on the thermoelastic properties of DNA adsorption films,the detection signals of microcantilevers and their temperature ***,the Parsegian's empirical potential based on a mesoscopic liquid crystal theory is employed to describe the interaction energy among coarse-grained DNA cylinders;then,the thought experiment method and the force balance method of nonlinear elastic network nodes are combined to characterize the elastic modulus,prestress and thermal expansion coefficient of DNA adsorption films;finally,based on an effective macroscopic continuum model for DNA microbeam deformation,we study the microcantilever resonance frequency shifts caused by DNA adsorptions and the temperature effect on the microcantilever static deflections,*** show that,compared with the convex-packaged,the re-entrant honeycomb packing pattern endows DNA adsorption films with a larger adjustable range of the elastic modulus and prestress,so as to make DNA-microcantilevers having an enhanced dynamic detection signal whereas a weaker response to temperature *** results are expected to provide a new option for the regulation design of DNA composite materials and microbeam sensors.

关键词： DNA-microbeam Packaging pattern Elastic property Thermal expansion coefficient Detection signal

clinical effects of phospholipase D2 in attenuating acute pancreatitis

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

World Journal of Gastroenterology 2025年第2期31卷 52-60页

作者： Jin-Wei Niu Guo-chao Zhang wu Ning hai-Bin Liu hua Yang chao-Feng Li Department of General Surgery China-Japan Friendship HospitalBeijing 100029China

BAcKGROUND The objective of the current study was to elucidate the clinical mechanism through which phospholipase D2(PLD2)exerted a regulatory effect on neutrophil migra-tion,thereby alleviating the progression of acute *** To elucidate the clinical mechanism through which PLD2 exerted a regulatory effect on neutrophil migration,thereby alleviating the progression of acute *** The study involved 90 patients diagnosed with acute pancreatitis,admitted to our hospital between March 2020 and November 2022.A retrospective analysis was conducted,categorizing patients based on Ranson score severity into mild(n=25),moderate(n=30),and severe(n=35)*** data was collected for each *** blot analysis assessed PLD2 protein expression in patient ***-time reverse transcription polymerase chain reaction was used to evaluate the mRNA expression of chemokine receptors associated with neutrophil *** levels of inflammatory factors in patients were detected using enzyme-linked immunosorbent *** migration tests were conducted to compare migration of neutrophils across groups and analyze the influence of PLD2 on neutrophil *** Overall data analysis did not find significant differences between patient groups(P>0.05).The expression of PLD2 protein in the severe group was lower than that in the moderate and mild groups(Phe expression level of PLD2 in the moderate group was also lower than that in the mild group(Phe severity of acute pancreatitis is negatively correlated with PLD2 expression(r=-0.75,P=0.002).The mRNA levels of c-X-c chemokine receptor type 1,c-X-c chemokine receptor type 2,c-c chemokine receptor type 2,and c-c chemokine receptor type 5 in the severe group are significantly higher than those in the moderate and mild groups(Phe expression levels in the moderate group are also higher than those in the mild group(Phe levels of c-reactive protein,tumo

关键词： Phospholipase D2 Neutrophil migration Acute pancreatitis Retrospective analysis Inflammatory response

Laser additive manufacturing of biodegradable Mg-based alloys for biomedical applications: A review

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

Journal of Magnesium and Alloys 2022年第4期10卷 915-937页

作者： c.L.wu W.J.Xie h.c.Man Department of Industrial and Systems Engineering The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina

Metallic implants are widely used in internal fixation of bone fracture in surgical *** are mainly used for providing mechanical support and stability during bone reunion,which usually takes a few months to *** implants made of stainless steels,Ti-based alloys and cocrMo alloys have been widely used for orthopedic reconstruction due to their high strength and high corrosion *** metallic implants will remain permanently inside the body after implantation,and a second surgery after bone healing is needed because the long-term presence of implant will lead to various *** implant removal surgery not only incurs expenditure,but also risk and psychological *** a consequence,studies on the development of biodegradable implants,which would degrade and disappear in vivo after bone reunion is completed,have drawn researchers’*** this connection,Mg-based alloys have shown great potentials as promising implant materials mainly due to their low density,inherent biocompatibility,biodegradability and mechanical properties close to those of ***,the high degradation rate of Mg-based implants in vivo is the biggest hurdle to *** from materials selection,a fixation implant is ideally tailor-made in size and shape for an individual case,for best surgical ***,laser additive manufacturing(LAM),with the advent of sophisticated laser systems and software,is an ideal process to solve these *** this paper,we reviewed the progress in LAM of biodegradable Mg-based alloys for biomedical *** effect of powder properties and laser processing parameter on the formability and quality was thoroughly *** microstructure,phase constituents and metallurgical defects formed in the LAMed samples were *** mechanical properties,corrosion resistance,biocompatibility and antibacterial properties of the LAMed samples were summarized and compared with samples fabricated by

关键词： Laser additive manufacturing Magnesium alloys Implant Biomedical applications Mechanical properties Biodegradability

The potential of berries to serve as selective inhibitors of pathogens and promoters of beneficial microorganisms

在线全文

学校读者我要写书评

暂无评论

Food Quality and Safety 2017年第1期1卷 3-12页

作者： Alison Lacombe Vivian c.h.wu School of Graduate Studies and Research National University of Natural MedicinePortlandOregon ProduceSafety and Microbiology Research Unit Western Regional Research CenterAgricultural Research ServiceUnitedStates Department of AgricultureAlbanyCaliforniaUSA

OBJEcTIVES:Berries are distinct from other foods because of their unique compounds with bioprotective effects and antimicrobial/prebiotic *** new knowledge of how these unique phytochemicals differentially affect microbial communities,inhibit foodborne pathogens,and conserve beneficial species,the health claims associated with berries can be further *** review explores components of berries that have antimicrobial or prebiotic properties and incorporates new knowledge gained from both in vitro and in vivo ***:With the continued research efforts,antimicrobials and prebiotics derived from berries may provide an alternative to synthetic preservatives and antibiotics in addition to providing health benefits to *** could be applied to food products or as dietary interventions through elucidating which compounds have antimicrobial properties and how ph and nutrient condition impact their *** addition,these compounds can be added to foods with beneficial microorganisms with minimal impact on their probiotic viability.

关键词： berries probiotics pathogens

Efficient and Stable Perovskite Solar cells and Modules Enabled by Tailoring Additive Distribution According to the Film Growth Dynamics

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

Nano-Micro Letters 2025年第2期17卷 387-400页

作者： Mengen Ma cuiling Zhang Yujiao Ma Weile Li Yao Wang Shaohang wu chong Liu Yaohua Mai Institute of New Energy Technology College of Physics&Optoelectronic EngineeringJinan UniversityGuangzhou 510632People’s Republic of China Key Laboratory of New Semiconductors and Devices of Guangdong higher Education Institutes Jinan UniversityGuangzhou 510632People’s Republic of China Guangdong Mellow Energy co. LimitedYuanming RoadZhuhai 519075GuangdongPeople’s Republic of China

Gas quenching and vacuum quenching process are widely applied to accelerate solvent volatilization to induce nucleation of perovskites in blade-coating *** this work,we found these two pre-crystallization processes lead to different order of crystallization dynamics within the perovskite thin film,resulting in the differences of additive *** then tailor-designed an additive molecule named 1,3-bis(4-methoxyphenyl)thiourea to obtain films with fewer defects and holes at the buried interface,and prepared perovskite solar cells with a certified efficiency of 23.75%.Furthermore,this work also demonstrates an efficiency of 20.18%for the large-area perovskite solar module(PSM)with an aperture area of 60.84 cm^(2).The PSM possesses remarkable continuous operation stability for maximum power point tracking of T_(90)>1000 h in ambient air.

关键词： Gas quenching Additive distribution Buried passivation Blade coating crystallization dynamics

“Zero‑Strain” NiNb_(2)O_(6) Fibers for All‑climate Lithium Storage

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第1期17卷 348-360页

作者： Yan Zhao Qiang Yuan Liting Yang Guisheng Liang Yifeng cheng Limin wu chunfu Lin Renchao che college of Physics Donghua UniversityShanghai 201620People’s Republic of China School of Materials Science and Engineering Institute of Materials for Energy and EnvironmentQingdao UniversityQingdao 266071People’s Republic of China Laboratory of Advanced Materials Shanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsAcademy for Engineering&TechnologyFudan UniversityShanghai 200438People’s Republic of China Zhejiang Laboratory Hangzhou 311100People’s Republic of China Inner Mongolia University Hohhot 010021People’s Republic of China

Niobates are promising all-climate Li^(+)-storage anode material due to their fast charge transport,large specific capacities,and resistance to electrolyte ***,their moderate unit-cellvolume expansion(generally 5%–10%)during Li^(+)storage causes unsatisfactory long-term ***,“zero-strain”NiNb_(2)O_(6) fibers are explored as a new anode material with comprehensively good electrochemical *** Li^(+)storage,the expansion of electrochemical inactive NiO_(6) octahedra almost fully offsets the shrinkage of active NbO_(6) octahedra through reversible O *** superior volume-accommodation capability of the NiO_(6) layers guarantees the“zero-strain”behavior of NiNb_(2)O_(6) in a broad temperature range(0.53%//0.51%//0.74%at 25//−10//60℃),leading to the excellent cyclability of the NiNb_(2)O_(6) fibers(92.8%//99.2%//91.1%capacity retention after 1000//2000//1000 cycles at 10c and 25//−10//60℃).This NiNb_(2)O_(6) material further exhibits a large reversible capacity(300//184//318 mAh g−1 at 0.1c and 25//−10//60℃)and outstanding rate performance(10 to 0.5c capacity percentage of 64.3%//50.0%//65.4%at 25//−10//60℃).Therefore,the NiNb_(2)O_(6) fibers are especially suitable for large-capacity,fast-charging,long-life,and all-climate lithium-ion batteries.

关键词： NiNb_(2)O_(6)porous fiber “Zero-strain”mechanism Electrochemical property harsh-temperature operation Operando characterization