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Remarkable N_(2)-selectivity enhancement of NH_(3)-SCR over HPMo modified MnCo-BTC@SiO_(2) catalyst

journal of Environmental Sciences 2024年第4期138卷 482-495页

作者： Songjin ko Xiaolong Tang Fengyu Gao Honghong Yi Hengheng Liu Ning Luo Department of Environmental Science and Engineering University of Science and Technology BeijingBeijing 100083China Department of Chemistry Pyongyang University of ArchitecturePyongyangDPR of Korea

In this work,the phosphomolybdate(HPMo)modification strategy was applied to improve the N_(2) selectivity of Mn Co-BTC@SiO_(2)catalyst for the selective catalytic reduction of NO_(x),and further,the mechanism of HPMo modification on enhanced catalytic performance was *** Mn Co-BTC@SiO_(2-x) catalysts with different HPMo concentrations,Mn CoBTC@SiO_(2)-0.75 catalyst exhibited not only the highest NH_(3)-SCR performance(95% at 200-300℃)but also the best N_(2)selectivity(exceed 80% at 100-300℃)due to the appropriate redox capacity,greater surface acidity.X-ray photoelectron spectrometer(XPS)and temperature programmed reduction of H_(2)(H_(2)-TPR)results showed that the modification with HPMo reduced the oxidation-reduction performance of the catalyst due to electron transfer from Mo^(5+)to Mn^(4+)/Mn^(3+)and prevent the excessive oxidation of ammonia adsorption ***_(3)temperature-programmed desorption of(NH_(3)-TPD)results showed that the modification with HPMo could significantly improve the surface acidity and NH_(3)adsorption,which enhance the catalytic activity and N_(2)***-situ diffused reflectance infrared Fourier transform spectroscopy(in-situ DRIFTS)revealed that modification with HPMo increased significantly the amount of adsorbed NH_(3)species on the Bronsted acid site and C_(B)/C_(L),it suppressed the production of N_(2)O by inhibiting the production of NH species,the deep dehydrogenation of ammonia adsorption *** study provided a simple design strategy for the catalyst to improve the low-temperature catalytic performance and N_(2)selectivity.

关键词： Metal organic framework(MOF) MnCo-BTC@SiO_(2) NH_(3)-SCR HPMo N_(2)selectivity

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Conserved Gross-Pitaevskii equations with a parabolic potential

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Communications in Theoretical Physics 2022年第10期74卷 30-36页

作者： Shi-min Liu da-jun Zhang Department of Mathematics Shanghai UniversityShanghai 200444People’s Republic of China

An integrable Gross–Pitaevskii equation with a parabolic potential is presented where particle density|u|^(2)is *** also present an integrable vector Gross–Pitaevskii system with a parabolic potential,where the total particle density∑^(n)_(j)=_(1)∣u_(j)∣^(2)is *** equations are related to nonisospectral scalar and vector nonlinear Schrödinger *** many conservation laws are *** transformations between the standard isospectral nonlinear Schrödinger equations and the conserved Gross–Pitaevskii equations,both scalar and vector cases are *** and dynamics are analyzed and *** solutions exhibit features of localized-like waves.

关键词： Gross-Pitaevskii equation gauge transformation nonisospectral conserved particle density

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Effect of resonant magnetic perturbation on boundary plasma turbulence and transport on j-TEXT tokamak

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Plasma Science and Technology 2019年第12期21卷 13-19页

作者： Ting WU Lin NIE Min XU jie YANG Zhipeng CHEN Yuejiang SHI Nengchao WANG da LI Rui KE Yi YU Shaobo GONG Ting LONG Yihang CHEN Bing LIU j-TEXT Team Southwestern Institute of Physics Chengdu 610041People's Republic of China International joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics State Key Laboratory of Advanced Electromagnetic Engineering and TechnologySchool of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074People's Republic of China Department of Nuclear Engineering Seoul National UniversitySeoul 08826Republic of Korea School of Physics University of Science and Technology of ChinaHefei 230026People's Republic of China Institute of Fusion Science School of Physical Science and TechnologySouthwest Jiaotong UniversityChengdu 610031People's Republic of China

The effect of resonant magnetic perturbation(RMP) on boundary turbulence and transport in j-TEXT plasma is experimentally *** plasma fluctuations in discharges with and without the(m/n=3/1) RMP currents are diagnosed by using Langmuir probe *** was found that fluctuations in the edge and scrape-off layer(SOL) regions decrease with the application of a 6 kA *** broadband turbulence at the radial location of ρ~0.9 which has a characteristic frequency of 40-150 kHz was strongly suppressed when applying RMP,as was the radial turbulent particle flux and blob transport in the near-SOL *** experimental findings make RMP a promising method of suppressing and controlling turbulence and particle transport in a plasma boundary.

关键词： RMP turbulent transport blob

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Ultrathin poly(cyclocarbonate-ether)-based composite electrolyte reinforced with high-strength functional skeleton

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journal of Energy Chemistry 2023年第6期81卷 603-612,I0013页

作者： Xiaojiao Zheng da Xu Ning Fu Zhenglong Yang Shanghai Key Laboratory of D&A for Metal-Functional Materials School of Materials Science and EngineeringTongji UniversityShanghai 200092China School of Chemical and Environmental Engineering Anyang Institute of TechnologyAnyang 455000HenanChina

Composite polymer electrolytes(CPEs)are considered to be the most promising to break through the performance and safety limitations of traditional lithium-ion batteries because of their excellent electrochemical and mechanical *** at the performance limitations of the most common polyether matrix such as poly(ethylene oxide)(PEO),a novel poly(cyclocarbonate-ether)polymer matrix was prepared by in-situ thermal curing,the weaker interaction between its C=O bond and Li^(+)can promote the rapid transport of Li^(+).Adding ionic liquid and active filler LLZTO to the matrix can synergistically reduce the crystallinity of matrix and promote the dissociation of lithium *** addition,a 3D functional skeleton made of polyacrylonitrile(PAN)and lithium fluoride(LiF)can greatly improve the mechanical strength of polymer matrix after cold pressing,and Li F is also conducive to interface *** thickness of the optimal sample(VP6L/CPL)was only 25μm,and its ionic conductivity,lithium ion transference number,and electrochemical stability window were as high as 7.17×10^(-4)S cm^(-1)(25℃),0.54 and 5.4 V,respectively,while the mechanical strength reaches 6.1 MPa,which can fully inhibit the growth of lithium *** excellent electrochemical performance and mechanical strength enable the assembled Li|VP6L/CPL|Li battery to be continuously charged for over 200 h and cycled stably for more than 2300 h,and Li|VP6L/CPL|LFP battery can be stably cycled for more than 400 and 550 cycles at 1 C(40℃)and 0.5 C(25℃),respectively.

关键词： Composite polymer electrolytes Polymer matrix 3D functional skeleton Plasticization Synergistic effect

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Peak shrinking and interpolating for PAPR reduction in M-IFoF-based mobile fronthaul

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Digital Communications and Networks 2022年第1期8卷 51-57页

作者： Luping Qin Haibo Li da Chen Tao jiang Research Center of 6G Mobile Communications School of Cyber Science and Engineering Huazhong University of Science and Technology1037 Luoyu RoadWuhan 430074China State Key Laboratory of Optical Communication Technologies and Networks China Information Communication Technologies Group CorporationWuhan430074China

We apply a Peak Shrinking and Interpolating(PSI)scheme to improve the Peak-to-Average Power Ratio(PAPR)performance in Multiple Intermediate-Frequency-over-Fiber(M-IFoF)based mobile *** key idea is to detect the high peaks of the signal and shrink them,and then the shrunk peak values are interpolated into the original signal to reduce the *** also compare the PSI technique with the previous Tone-Reservation(TR)technique and Phase Pre-Distortion(PPD)technique in terms of PAPR reduction effect and computational *** simulation results indicate that the PSI scheme can reduce the PAPR by more than 4.3 dB at 0.1%CCDF,which outperforms the two previous schemes with lower computational ***,we find that altering M-IFoF system parameters has little effect on the performance of the PSI technique.

关键词： Mobile fronthaul Multi-IF-Over-Fiber(M-IFoF) Peak Shrinking and Interpolating(PSI) Tone-Reservation(TR) Phase Pre-Distortion(PPD)

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Synthesis and Structural Characterization of a Polyoxomolybdate HNa_7[Mo_(36)O_(112)(H_2O)_(16)]·47H_2O

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Chinese journal of Structural Chemistry 2007年第2期26卷 165-171页

作者： LIU Ying DOU jian-Min WANG da-Qi ZHANG Xian-Xi LI da-Cheng jIA Ying-Chun College of Chemistry and Chemical Engineering Liaocheng University Liaocheng 252059 China

A new polyoxomolybdate complex HNaT[Mo36O112（H2O）16]·47H2O 1 has been prepared in the beaker solution and characterized by single-crystal X-ray diffraction and elemental analyses. Crystal data： H127Mo36Na7O175, Mr = 6542.79, monoclinic, C2/c, a = 40.891（6）, b = 17.900（3）, c = 25.580（4）A, β = 125.673（2）°, V = 15210（4）A3, Z = 4, Dc = 2.857 g/cm^3, F（000） = 12464,μ = 3.013 mm^-1, R = 0.0633 and wR = 0.1654 （I 〉 20（I））. With the bridging sodium cations, the [Mo36Ou2（H2O）16]^8- units in compound 1 are linked to form a one-dimensional structure, on the basis of which a three-dimensional architecture is further constructed via other sodium cations and complicated hydrogen bonds.

关键词： polyoxomolybdate molybdate sodium X-ray analysis

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Design and analysis of a scheme for the naval gun test shell entering the bore

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Defence Technology（防务技术） 2021年第4期17卷 1374-1386页

作者： Xin-yun Liu da-lin Wu jian Hou Shijiazhuang Campus Army Engineering UniversityShijiazhuang050003China Naval University of Engineering Wuhan430000China

The test shell without projectile belt is widely used in the teaching,inspection and maintenance of modern automatic naval *** order to ensure the normal work of each mechanism,it is very important to design the buffer and limit of the test shell during the process of entering the *** a certain type of medium caliber naval gun as the research object,the design of colloidal fluid damper and cartridge lock was proposed to ensure the reliability of entering the bore and closing the *** combining the simulation methods of computational fluid dynamics(CFD)and multibody system dynamic(MBD),it was analyzed whether the structural design can meet the engineering *** research results show that the colloidal fluid damper can dissipate a large amount of kinetic energy of the shell,and the cartridge lock can limit the rebound *** combination of the two ensures the smooth process of closing the *** research provides a design method for the process of the test shell entering the bore,and provides theoretical support for the feasibility of the method.

关键词： Naval gun Colloidal fluid damper Cartridge lock CFD MBD

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Effect of testicular capsulotomy on secretion of testosterone and gonadotrophins in rats

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Asian journal of Andrology 2000年第4期2卷 257-261页

作者： da-NianQIN MaryA.Lung DepartmentofPhysiology ShantouUniversitySchoolofMedicineShantou515031China DepartmentofPhysiology UniversityofHongKongHongKongChina

Aim: In order to clarify further the mechanisms underlying the effect of capsulotomy on testicular function, the lev-els of testosterone, LH and FSH were observed. Methods: Intratesticular testosterone levels and LH, FSH levelsin the peripheral blood of normal, sham-operated and capsulotomized rats were detected by RIA. Results: Aftertesticular capsulotomy, there was a progressive reduction in the testosterone level in the testicular venous blood togetherwith a progressive increase in the LH and FSH levels in the peripheral blood from approximately 30 days post-capsuloto-my. Morphological changes were observed at 5-10 days after capsulotomy, i. e., far ahead of the hormonal ***: The seminiferous tubular damage after testicular capsulotomy was not caused by the reduction in testos-terone, and on the contrary, the hormonal change might be secondary to the morphological alterations. The increase inLH level most likely resulted from a negative feedback influence from the lowered testosterone level, while the increasein FSH secretion may be a feedback signal of the damaged seminiferous tubules. (Asian j Androl 2000 Dec; 2: 257-261 )

关键词： testis testicular capsulotomy testosterone LH FSH

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Effect of testicular capsulotomy on fertility of rats

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Asian journal of Andrology 2001年第1期3卷 21-25页

作者： da-NianQIN MaryA.Lung DepartmentofPhysiology ShantouUniversitySchoolofMedicineShantou515031China DepartmentofPhysiology UniversityofHongKongHongKongChina

Aim: To demonstrate the effect of capsulotomy on the fertility of male rats. Methods: Testicular capsulotomywas carded out in immature (21 days) and adult (60 days) male rats. The fertility of them was assessed by cohabita-tion with proestrus females overnight and 20 days later, the females were examined for impregnation. Morphologicalchanges at the site of the capsulotomy were observed under light microscope. Results: In rats capsulotomized atday 60, the fertility was gradually depressed and all the rats completely lost their fertility 2 months post-operation. Atthat time, a partial regeneration of the capsule at the site of capsulotomy was observed. Immature rats capsulotomized atday 21 were found to possess normal fertility at maturity. The capsulotomy site was almost completely recovered 60days post-operation. Conclusion: In male rats, testicular capsulotomy at the age of day 60 will damage ***, when capsulotomy is performed at day 21, fertility is preserve.(Asian j Androl 2001 Mar; 3: 21-25)

关键词： testis testicular capsulotomy fertility

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Boosting energy-storage capability in carbon-based supercapacitors using low-temperature water-in-salt electrolytes

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journal of Energy Chemistry 2022年第7期31卷 521-530,I0013页

作者： joao Pedro A.Santos Manuel j.Pinzón érick A.Santos Rafael Vicentini Cesar j.B.Pagan Leonardo M.da Silva Hudson Zanin Brazilian Renewable Energies Center for Innovation on New EnergiesSchool of Electrical and Computer EngineeringUniversity of CampinasSao Paulo 13083-852Brazil Department of Semiconductors Instruments and PhotonicsSchool of Electrical and Computer EngineeringUniversity of CampinasSao Paulo 13083-852Brazil Laboratory of Fundamental and Applied Electrochemistry Department of ChemistryFederal University of Jequitinhonha e Mucuri’s ValleyMinas Gerais 39100-000Brazil

Supercapacitors(SCs) are high-power energy storage devices with ultra-fast charge/discharge *** using concentrated aqueous-based electrolytes can work at low temperatures due to their intrinsic properties, such as higher freezing point depression(FPD) and robustness. Besides the traditional organic-and aqueous-based(salt-in-water) electrolytes used in SCs, water-in-salt(WISE) sodium perchlorate electrolytes offer high FPD, non-flammability, and low-toxicity conditions, allowing the fabrication of safer, environmentally friendly, and more robust devices. For the first time, this work reports a comprehensive study regarding WISE system’s charge-storage capabilities and physicochemical properties under low-temperature conditions(T dates to improve the energy-storage characteristics in SCs.

关键词： Carbon supercapacitors Water-in-salt electrolytes Low-temperature charge-storage Specific energy improvement at low temperatures

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