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Acta Metallurgica sinica(English Letters) 2002年第2期15卷 149-153页

作者： Y.Choi N.i.Baik H.D.Cho s.i.hong Department of Metallurgical and Materials Engineering Sunmoon University#100 Kalsan-RiTangjeoung-MyunAsanChungnam336-840Korea Department of Environmental Engineering Sunmoon University#100 Kalsan-RiTangjeoung-MyunAsanChungnam336-840Korea Department of Metallurgical Engineering Chungnam National UniversityDaejeon305-764Korea Manuscript received 31 July 2001

Ti3 AL-Nb-Mo composites were prepared by sHs using initial powder mixtures of Ti-Al-Nb-Mo and their corrosion and mechanical properties were studied to develop bioand environmental materials. The composites reached 99.8% of theoretical density after the direct consolidation. The composites shows equiaxed primary a2 in a matrix of fine secondary a2 plates and ordered 82 (Bo) forming a basket weave structure. The strain rate sensitivity (m = dlnσ/dlne) at 2% strain is 0.008. Corrosion potential and corrosion rate of the composites formed by sHs were -151. 5m VsHE and 5. 72× 10^(-8)A/cm2 for Ti3 Al-10Nb-1. 5Mo and - 138.4m VsHE and 4. 12×10^(-8)cm2 for Ti3 Al-12Nb-1.5Mo in a 50% NaOH-10%FeCi3 solution, respectively. Corrosion resistance decreased with niobium content in the composites and chloride content in the aqueous solution. selective corrosion of a2 phase in a matrix occurred in the corrosion environment which suggests that the corrosion potential and rate changes are related to the niobium content and Q2 phase in a matrix.

关键词： Ti3 Al alloy corrosion strength sHs

Non-isothermal nano-crystallization kinetics in amorphous Ni_(55)Nb_(35)si_(10) alloy

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Transactions of Nonferrous Metals society of China 2019年第2期29卷 358-364页

作者： H.MiNOUEi G.H.AKBARi M.H.ENAYATi s.i.hong Department of Metallurgy and Materials science Shahid Bahonar University Department of Material Engineering Nanotechnology and Advanced Material InstituteIsfahan University of Technology (IUT) Department of Nanomaterials Engineering Chungnam National University

The non-isothermal crystallization kinetics of Ni55Nb35si10 amorphous alloy,prepared by mechanical alloying,was studied using differential scanning *** amorphous alloy showed one-stage crystallization on heating,which led to the formation of nano-intermetallic crystals in amorphous *** apparent activation energy for the crystallization of the alloy,determined by the Kissinger equation,was relatively high(468 kJ/mol),indicating that this amorphous alloy has high thermal *** in the activation energy during the crystallization process,were also evaluated by iso-conversional *** results showed that it decreases slowly from the beginning to crystallized fractionα=0.35 and it remains almost constant to the end of the *** nano-crystallization mechanism for the non-isothermal crystallization of the amorphous alloy was explained by determining Avrami *** electron microscopy studies revealed the microstructural modification of amorphous alloy via nanocrystallization during *** results suggest that the nucleation rate decreases with increasing time and the crystallization mechanism is governed dominantly by a three-dimensional diffusion-controlled growth.A predictive equation was obtained based on the sestak-Berggren autocatalytic model to describe quantitatively the non-isothermal crystallization kinetics.

关键词： amorphous alloy kinetics nano-crystallization DsC activation energy

Bacteria and host: what does this mean for sepsis bottleneck?

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World Journal of Emergency Medicine 2025年第1期16卷 10-17页

作者： Azzah s Alharbi Raghad Hassan sanyi Esam i Azhar Department of Clinical Microbiology and immunology Faculty of MedicineKing Abdulaziz UniversityJeddah 21362Saudi Arabia special infectious Agent Unit King Fahad Medical Research CenterKing Abdulaziz UniversityJeddah 21362Saudi Arabia College of Health and Medical Technology Middle Technical UniversityBaghdad 10047Iraq Department of Medical Laboratory sciences Faculty of Applied Medical SciencesKing Abdulaziz UniversityJeddah 21362Saudi Arabia

BACKGROUND: sepsis is a life-threatening inflammatory condition in which the invading pathogen avoids the host's defense mechanisms and continuously stimulates and damages host cells. Consequently, many immune responses initially triggered for protection become harmful because of the failure to restore homeostasis, resulting in ongoing hyperinflammation and immunosuppression. METHODs: A literature review was conducted to address bacterial sepsis, describe advances in understanding complex immunological reactions, critically assess diagnostic approaches, and emphasize the importance of studying bacterial bottlenecks in the detection and treatment of ***: Diagnosing sepsis via a single laboratory test is not feasible;therefore, multiple key biomarkers are typically monitored, with a focus on trends rather than absolute values. The immediate interpretation of sepsis-associated clinical signs and symptoms, along with the use of specific and sensitive laboratory tests, is crucial for the survival of patients in the early stages. However, long-term mortality associated with sepsis is now recognized, and alongside the progression of this condition, there is an in vivo selection of adapted ***: Bacterial sepsis remains a significant cause of mortality across all ages and societies. While substantial progress has been made in understanding the immunological mechanisms underlying the inflammatory response, there is growing recognition that the ongoing host-pathogen interactions, including the emergence of adapted virulent strains, shape both the acute and long-term outcomes in sepsis. This underscores the urgent need for novel high-throughput diagnostic methods and a shift toward more pre-emptive, rather than reactive, treatment strategies in sepsis care.

关键词： sepsis Bacteria Bottleneck inflammation

Quantum public-key crypto via EPR pairs

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science China(Physics,Mechanics & Astronomy) 2025年第1期68卷 54-59页

作者： Xiang-Qun Fu hong-Wei Li Jian-hong shi Tan Li Wan-su Bao Henan Key Laboratory of Quantum information and Cryptography Information Engineering UniversityZhengzhou 450004China synergetic innovation Center of Quantum information and Quantum Physics University of Science and Technology of ChinaHefei 230026China

With the development of quantum computing technology,quantum public-key cryptography is gradually becoming an alternative to the existing classical public-key *** paper designs a quantum trapdoor one-way function via EPR pairs and quantum *** on this,a new quantum public-key cryptosystem is presented,which offers forward security,and can resist the chosen-plaintext attack and chosen-ciphertext *** with the existing quantum public-key cryptos,eavesdropping can be automatically detected in this new quantum public-key cryptosystem under a necessary condition,which is also detailed in the paper.

关键词： quantum public-key crypto trapdoor one-way function EPR pairs

Tetrahedron constellation of gravitational wave observatory

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science China(Physics,Mechanics & Astronomy) 2025年第2期68卷 86-93页

作者： hong-Bo Jin Cong-Feng Qiao National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China international Centre for Theoretical Physics Asia-Pacific University of Chinese Academy of SciencesBeijing 100190China school of Physical sciences University of Chinese Academy of SciencesBeijing 100049China

For the first time,we have introduced the tetrahedron constellation of gravitational wave observatory(TEGO)composed of four identical spacecrafts(s/Cs).The laser telescopes and their pointing structures are mounted on the s/C platform and are evenly distributed at three locations 120 degrees *** structures form automatically a stable mass center for the *** time delay interferometry(TDi)is used to suppress the frequency noise of gravitational wave(GW)*** unequal-arm Michelson TDi configuration and the sagnac TDi configuration are equally effective at eliminating the laser frequency noise based on the TEGO ***,compared with the configurations of LisA,Taiji,and Tian Qin,the TEGO has more combinations of optical paths in its TDi system sensitive to GW *** six arms of TEGO are simultaneously sensitive to the six polarization modes of *** sensitivity implies that GW modes beyond the predictions of general relativity(GR)can be detected *** instance,a scalar longitudinal mode of GWs,which is not predicted by GR,has been identified as a dominant polarization *** mode is found to be evident in the response amplitudes of the TEGO arms,such as between s/C1 and s/C4,and s/C3 and s/C4,at certain orbital positions.

关键词： gravitational wave detectors and experiments gravitational waves experimental tests of gravitational theories experimental studies of gravity

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Viscosity, NMR Diffusometry and Light scattering Data for Aqueous and Aqueous-salt solutions of Poly(1-butyl-3-vinylimidazolium bromide)

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CHiNEsE JOURNAL OF POLYMER sCiENCE 2025年第2期43卷 380-391页

作者： Korchak, Petr A. Yarchenko, Polina s. safonova, Evgenia A. Koneva, Alina s. Victorov, Alexey i. st Petersburg state Univ St Petersburg 199034 Russia

Poly(1-butyl-3-vinylimidazolium bromide) is a polymerized ionic liquid (PiLs), a relatively new class of materials that combines the attractive properties of ionic liquids (iLs) and polyelectrolytes and finds wide applications. The backbone of this PiL is composed of quaternary imidazolium salts, which are among the most promising and popular iLs. However, little is known about the physicochemical characteristics of the aqueous solutions of this PiL. in this study, we synthesized and characterized samples of this PiL and obtained experimental data on the viscosity, static and dynamic light scattering, and nuclear magnetic resonance diffusometry for aqueous and aqueous KBr solutions with varying polymer contents at T=298.15 K. We discuss the effects of the polymer concentration and salinity on the behavior of the solution.

关键词： Polymerized ionic liquid Polyelectrolyte solutions Viscosity Light scattering NMR diffusometry

Creation of an oxygen-enriched environment during synthesis as an effective way to improve luminescent properties of Y_(2)O_(3):Eu^(3+)

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Journal of Rare Earths 2025年第1期43卷 21-29,I0001页

作者： Aleksandr A.Nashivochnikov Anton i.Kostyukov Mariana i.Rakhmanova Lidiya s.Kibis svetlana V.Cherepanova Evgenii A.suprun Novosibirsk state University Pirogova Str.2630090NovosibirskRussia Boreskov institute of Catalysis sB RAs 5 Lavrentiev Ave630090NovosibirskRussia Nikolaev institute of inorganic Chemistry sB RAs 3 Lavrentiev Ave630090NovosibirskRussia

The growing demand for luminescent nanomaterials intended for various applications increases the necessity to develop and improve approaches to the creation of highly efficient nanosized *** current study,an approach to enhancing the efficiency of red luminescence of monoclinic Y_(2)O_(3):Eu^(3+)with the particle size of~20 nm by creating the oxygen-enriched environment during the gas-phase synthesis was *** investigate the effect of oxygen amount during the synthesis on characteristics of the phosphor,a series of nano structured Y_(2)O_(3):Eu^(3+)with the addition of 0-40 vol%O_(2) to the main buffer gas Ar was synthesized by laser *** is shown that the amount of added O_(2) exerts virtually no effect on the phase composition and particle size,but significantly improves the luminescent characteristics of Y_(2)O_(3):Eu^(3+).Thus,the addition of 30 vol%O_(2) leads to virtually a 20-fold growth in the photoluminescence(PL)intensity caused by ^(5)D_(0)→^(7)F_(0-4) transitions in Eu^(3+)and an increase in the absolute PL quantum yield from 3%to 53%(λex=395 nm)compared to the sample synthesized without O_(2).The addition of oxygen also improves the emission color coordinates from(0.571,0.320)to(0.630,0.322)due to the removal of a considerable fraction of oxygen *** synthesized nanopowders are shown to be highly stable:upon storage under ambient conditions for two *** yield(QY)of the samples decreases by less than 2%.it is expected that the key features underlying the proposed approach will be useful for various methods used to synthesize oxide nanophosphors.

关键词： Photoluminescence Quantum yield Laservaporization Y_(2)0_(3):Eu^(3+) Monoclinic Y_(2)0_(3) Rareearths

Three-dimensional internal multiple elimination in complex structures using Marchenko autofocusing theory

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Petroleum science 2025年第1期22卷 222-233页

作者： Pei-Nan Bao Ying shi Xin-Min shang hong-Xian Liang Wei-hong Wang school of Earth sciences Northeast Petroleum University Geophysical Research institute of shengli Oilfield Sinopec

internal multiples are commonly present in seismic data due to variations in velocity or density of subsurface media. They can reduce the signal-to-noise ratio of seismic data and degrade the quality of the image. With the development of seismic exploration into deep and ultradeep events, especially those from complex targets in the western region of China, the internal multiple eliminations become increasingly challenging. Currently, three-dimensional(3D) seismic data are primarily used for oil and gas target recognition and drilling. Effectively eliminating internal multiples in 3D seismic data of complex structures and mitigating their adverse effects is crucial for enhancing the success rate of drilling. in this study, we propose an internal multiple prediction algorithm for 3D seismic data in complex structures using the Marchenko autofocusing theory. This method can predict the accurate internal multiples of time difference without an accurate velocity model and the implementation process mainly consists of several steps. Firstly, simulating direct waves with a 3D macroscopic velocity ***, using direct waves and 3D full seismic acquisition records to obtain the upgoing and downgoing Green's functions between the virtual source point and surface. Thirdly, constructing internal multiples of the relevant layers by upgoing and downgoing Green's functions. Finally, utilizing the adaptive matching subtraction method to remove predicted internal multiples from the original data to obtain seismic records without multiples. Compared with the two-dimensional(2D) Marchenko algorithm, the performance of the 3D Marchenko algorithm for internal multiple prediction has been significantly enhanced, resulting in higher computational accuracy. Numerical simulation test results indicate that our proposed method can effectively eliminate internal multiples in 3D seismic data,thereby exhibiting important theoretical and industrial application value.

关键词： Marchenko internal multiple elimination Autofocusing Three-dimensional seismic data

influencing factors of early post-traumatic stress disorder in young and middle-aged individuals with open globe injuries in west China:a cross-sectional study

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international Journal of Ophthalmology(English edition) 2025年第1期18卷 146-153页

作者： Yi-Man Li Xin Zhang Ji-hong Zeng hong-Mei Luo Department of Ophthalmology West China Hospital of Sichuan UniversityChengdu 610041Sichuan ProvinceChina

AiM:To evaluate the prevalence of early post-traumatic stress disorder(PTsD)among young and middle-aged patients who have suffered open globe injuries,and to identify the psychosocial factors influencing PTsD in these ***:A total of 280 patients who underwent ocular trauma surgery between January 2023 and January 2024 were selected through convenience *** were collected using a custom-designed demographic questionnaire,the Connor-Davidson Resilience scale(CDRisC),the Cognitive Emotion Regulation Questionnaire(C-ERRi),and the PTsD Checklist-Civilian Version(PCL-C).Univariate analysis and stepwise multiple linear regression analysis were performed to determine the factors affecting PTsD in these ***:The average PTsD score for the patients was 33.22±*** scores for individual PTsD dimensions,ranked from highest to lowest,were recurrent traumatic experiences,heightened arousal,avoidance reactions,and social *** PTsD symptoms were observed in 85 patients(30.36%).Univariate analysis indicated that gender,postoperative vision,marital status,psychological resilience,and rumination were significant factors affecting PTsD symptoms(χ^(2)/t=6.53,17.88,8.83,2.17,and 14.1,respectively;all Pson correlation analysis showed a positive correlation between rumination and PTsD symptoms(r=0.73,Pive correlation between psychological resilience and PTsD symptoms(r=-0.14,Pstepwise multiple linear regression analysis identified postoperative vision(notably eye removal),rumination levels,and psychological resilience(optimism)as major factors influencing PTsD in these patients(R^(2)=0.57,PsiON:Young and middle-aged patients with open globe injuries have a high incidence of *** risk factors for early PTsD include primary enucleation,high levels of rumination,and low psychological resilience(optimism).Conversely,patients with good postoperative vision recovery,low rumination l

关键词： young and middle-aged open globe injuries post-traumatic stress disorder rumination psychological resilience

The secondary periodic elementβ_(p^(2)/p^(2)-1)and its applications

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science China Mathematics 2025年第1期68卷 207-222页

作者： Jianguo hong Xiangjun Wang Yu Zhang science College Shijiazhuang UniversityShijiazhuang 050035China school of Mathematical sciences Nankai UniversityTianjin 300071China Center for Applied Mathematics Tianjin UniversityTianjin 300072China

Let p≥7 be a *** prove thatβ_(p^(2)/p^(2)-1)survives to E_(∞)in the Adams-Novikov spectral ***,using the Thom mapΦ:■,we can see that h0h3 also survives to E_(∞)in the classical Adams spectral *** an application ... 详细信息

关键词： stable homotopy groups of spheres Adams-Novikov spectral sequence in nite descent method