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1Direct transformation of FGD gypsum to calcium sulfate hemihydrate whiskers:Preparation,simulations,and process analysis显示文摘Calcium sulfate hemihydrate(CSH) whiskers were synthesized by phase transition in CaCl_2 solution under atmospheric pressure.Analytical-grade calcium sulfate dihydrate(AR CSD) was used as the raw material for the synthesis of CSH whiskers,according to orthogonal experiments.The effects of reaction temperature,AR CSD content,H_2SO_4 content,and reaction time were investigated,and the crystallization conditions were optimized.The as-prepared CSH whiskers displayed a regular morphology and a highly uniform size,with an aspect ratio of 105.A simulation system was also established by blending various sulfates with AR CSD,to evaluate the effects of impurities in flue gas desulfurization(FGD) gypsum.The main aim was to prepare CSH whiskers directly from FGD gypsum,without any purification,using the optimized conditions.This is a facile potential alternative process for large-scale production of CSH whiskers using abundant FGD gypsum as source materials.Miao Miao Xin Feng Gangling Wang Shaomei Cao Wen Shi Liyi Shi 2015Particuology2015,13,2:31
2Controlled synthesis of porous spinel cobalt manganese oxides as efficient oxygen reduction reaction electrocatalysts显示文摘在这篇文章,我们报导一个灵巧的先锋热分解方法准备多孔的尖晶石类型钴锰氧化物(公司 x Mn 3-x 有可控制的形态学和水晶的结构的 O 4) 。在反应的盖住的代理人被发现在从立方的公司 2 MnO 4 nanorods 到四角形的公司 2 Mn 4 microspheres 和四角形的公司 2 Mn 4 立方体分别地。所有准备尖晶石材料展出灿烂的氧减小反应(ORR ) 与高稳定性一起的 electrocatalysis。特别地,立方的公司 2 有 0.9 V 的一个发作潜力的最好的表演和是的 0.72 V 的一个一半波浪潜力很关上到商业 Pt/C 的 MnO 4 nanorods 表演。同时,立方的公司 2 在场的 MnO 4 nanorods 有他们在 10,000 秒的一连续操作时间以后的 electrocatalytic 活动的可以忽略的降级的优异稳定性,它比商业 Pt/C electrocatalyst 好一些。Hongchao Yang Feng Hu Yejun Zhang Liyi Shi Qiangbin Wang 2016Nano Research2016,9,1:11
3热诱导FLP重组酶删除转基因烟草外源基因显示文摘利用热激启动子Hsp18.2、nP重组酶基因及其专一识别位点构建了重组酶删除系统的植物表达载体转化烟草。热激处理后转基因植株中FLP重组酶表达并识别两个同向lox P-frt重组酶识别位点,使两位点间的DNA插入片段(包含kn1、gus、nptⅡ基因)从转基因烟草基因组中删除,由kn1基因引起的转基因烟草特殊表型及gus基因产生的蓝色表型消失。高媛媛 赵德刚 罗克明 裴炎 LiYi 2007高技术通讯2007,17,2:11
4Aftershock sequence relocation of the 2021 M_(S)7.4 Maduo Earthquake, Qinghai, China显示文摘The 2021 Qinghai Maduo M_(S)7.4 earthquake was one of the strongest earthquakes that occurred in the Bayan Har block of the Tibetan Plateau during the past 30 years,which spatially filled in the gap of strong earthquake in the eastern section of the northern block boundary.In this study,the aftershock sequence within 8 days after the mainshock was relocated by double difference algorithm.The results show that the total length of the aftershock zone is approximately 170 km;the mainshock epicenter is located in the center of the aftershock zone,indicating a bilateral rupture.The aftershocks are mainly distributed along NWW direction with an overall strike of 285°.The focal depth profiles indicate that the seismogenic fault is nearly vertical and dips to southwest or northeast in different sections,indicating a complex geometry.There is an aftershock gap located to the southeast of the mainshock epicenter with a scale of approximately 20 km.At the eastern end of the aftershock zone,horsetaillike branch faults show the terminal effect of a large strike-slip fault.There is a NW-trending aftershock zone on the north side of the western section,which may be a branch fault triggered by the mainshock.The location of the aftershock sequence is close to the eastern section of the Kunlun Mountain Pass-Jiangcuo(KMPJ)fault.The sequence overlaps well with surface trace of the KMPJ fault.We speculate that the KMPJ fault is the main seismogenic fault of the M_(S)7.4 Maduo earthquake.Weilai WANG Lihua FANG Jianping WU Hongwei TU Liyi CHEN Guijuan LAI Long ZHANG 2021Science China Earth Sciences2021,64,8:11
5Shape and size effects of ceria nanoparticles on the impact strength of ceria/epoxy resin composites显示文摘Ceria nanoparticles with various shapes (rods, cubes, and plates) and sizes were controllably synthesized and then introduced into epoxy resin. Subsequently, we investigated correlations between the shape and size of ceria nanostructures and the mechanical performance of composites. The samples were characterized by transmission electron microscopy, scanning electron microscopy, and X-ray diffraction. Compared with commercial ceria filled composites, the composites made with morphology-controlled ceria nanos-tructures show a higher impact strength. It is found that epoxy resins made with high-aspect-ratio ceria nanorods show the highest impact strength, up to 17.27 kJ/m 2 , which is about four times that of the neat epoxy resin.Xiaoqiang He Dengsong Zhang Hongrui Li Jianhui Fang Liyi Shi 2011Particuology2011,9,1:7
6Preparation of Ultra-nano Talcum in Sand Mill and Its Application in the Polypropylene显示文摘The grinding of ultra-fine talcum powder and its application in a polypropylene (PP) matrix were investigated. Ultra-fine talcum powder was prepared by adjusting the grinding parameters of the physical milling process. The talcum powder exhibited polymodal distribution. The layered morphology of talcum particles in a horizontal sand mill was rarely damaged or destroyed. PP-talcum nanocomposites were prepared by melt blending using a twin-screw extruder. Nano talcum can be seen as a single particle, although it is not very apparent. The bending strength of talcum-filled PP was gradually increased by approximately 28%. The impact strength linearly decreased as the filler weight ratio increased. The overall maximum improvement in mechanical properties was recorded when the filler ratios increased from 15 wt% to 20 wt%.宋娜 ZHANG Xiaoji SHI Liyi 丁鹏 FU Yi PENG Zhihong 2013Journal of Wuhan University of Technology(Materials Science)2013,28,1:5
7A 14 nucleotide deletion mutation in the coding region of the PpBBX24 gene is associated with the red skin of“Zaosu Red”pear(Pyrus pyrifolia White Pear Group):a deletion in the PpBBX24 gene is associated with the red skin of pear显示文摘Red skin is an important quality trait for pear fruits and is determined by the concentration and composition of anthocyanins.The regulatory mechanism underlying anthocyanin accumulation is a popular topic in fruit research.Red mutants are ideal materials for studying the molecular mechanism of color diversity in pear.Although several red pear mutants have been cultivated and are in production,no exact locus containing the responsible genetic mutation has been identified.In this study,by combining the bulked segregant analysis with whole-genome sequencing,we identified a 14 nucleotide deletion mutation in the coding region of the PpBBX24 gene from the red pear mutant“Zaosu Red”.We further verified that the deletion was present only in the red mutant of“Zaosu”and in its red offspring,which was different from that which occurred in other red pear fruits.This deletion results in a coding frame shift such that there is an early termination of the PpBBX24 gene and loss of key NLS and VP domains from PpBBX24.The lost domains may reduce or alter the normal function of PpBBX24.In addition,we found that the transcript levels of the PpMYB10 and PpHY5 genes in red samples were significantly higher than those in green samples,whereas the results for the normal-type PpBBX24 gene were the opposite.We ultimately revealed that the 14 nucleotide deletion mutation in the coding region of the PpBBX24 gene is associated with the red skin of the“Zaosu Red”pear.This finding of somatic mutational events will be helpful for breeding new red pear cultivars and for understanding the regulatory mechanisms involved in pear skin pigmentation.Chunqing Ou Xiaoli Zhang Fei Wang Liyi Zhang Yanjie Zhang Ming Fang Jiahong Wang Jixun Wang Shuling Jiang Zhihong Zhang 2020Horticulture Research2020,7,1:4
8Defect inspection of flip chip package using SAM technology and fuzzy C-means algorithm显示文摘Solder bumps are widely used in surface mount components, which provide electrical and mechanical connection between the chip/package and the substrate. As the solder bump getting smaller in dimension and pitch, it becomes more difficult to inspect the solder defects hidden in the IC package. In this paper, an intelligent inspection method using the scanning acoustic microscopy(SAM) and the fuzzy C-means(FCM) algorithm was investigated. A flip chip package of FA10 was chosen as the test sample. The SAM tests of FA10 were carried out in C-scan mode. The sub-image of every solder bump was segmented from the SAM image. The statistical features were then calculated and adopted for clustering of solder bumps using the FCM algorithm. The recognition results of FCM reached a high accuracy of 94.3%. The intelligent system is effective for defect inspection in high density packages.LU XiangNing LIU Fan HE ZhenZhi LI LiYi HU NingNing SU Lei 2018Science China(Technological Sciences)2018,61,9:4
9Ionic liquids for high performance lithium metal batteries显示文摘The pursuit of high energy density has promoted the development of high-performance lithium metal batteries.However,it faces a serious security problem.Ionic liquids have attracted great attention due to their high ionic conductivity,non-flammability,and the properties of promoting the formation of stable SEI films.Deeply understanding the problems existing in lithium metal batteries and the role of ionic liquids in them is of great significance for improving the performance of lithium metal batteries.This article reviews the effects of the molecular structure of ionic liquids on ionic conductivity,Li^(+)ion transference number,electrochemical stability window,and lithium metal anode/electrolyte interface,as well as the application of ionic liquids in Li-high voltage cathode batteries,Li-O_(2) batteries and Li-S batteries.The molecular design,composition and polymerization will be the main strategies for the future development of ionic liquid-based electrolytes for high performance lithium metal battery.Kexin Liu Zhuyi Wang Liyi Shi Siriporn Jungsuttiwong Shuai Yuan 2021Journal of Energy Chemistry2021,30,8:4
10Fabrication and electrical characteristics of flash-sintered SiO_(2)-doped ZnO-Bi_(2)O_(3)-MnO_(2) varistors显示文摘The dense ZnO-Bi_(2)O_(3)-MnO_(2)(ZBMS)varistors for x=0,1,2,3 wt% were fabricated by flash sintering method under the low temperature of 850℃ within 2 min.The sample temperature was estimated by a black body radiation model in the flash sintering process.The crystalline phase assemblage,density,microstructure,and electrical characteristics of the flash-sintered ZBMS varistors with different SiO_(2)-doped content were investigated.According to the XRD analysis,many secondary phases were detected due to the SiO_(2) doping.Meanwhile,the average grain size decrease with increasing SiO_(2)-doped content.The improved nonlinear characteristics were obtained in SiO_(2)-doped samples,which can be attributed to the ion migration and oxygen absorption induced by the doped SiO_(2).The flash-sintered ZBMS varistor ceramics for x=2 wt% exhibited excellent comprehensive electrical properties,with the nonlinear coefficient of 24.5,the threshold voltage and leakage current of 385 V·mm^(-1 )and 11.8μA,respectively.Pai PENG Yujun DENG Jingpeng NIU Liyi SHI Yunzhu MEI Sanming DU Juan LIU Dong XU 2020Journal of Advanced Ceramics2020,9,6:3
11织物的润湿因素——潮湿瞬态下水分向吸湿性织物的扩散显示文摘LiYi 曹忠辉 黎明 2000国外纺织技术(纺织针织服装化纤染整)2000,,1:3
12Response of Mode Water and Subtropical Countercurrent to Greenhouse Gas and Aerosol Forcing in the North Pacific显示文摘The response of the North Pacific Subtropical Mode Water and Subtropical Countercurrent (STCC) to changes in greenhouse gas (GHG) and aerosol is investigated based on the 20th-century historical and single-forcing simulations with the Geo-physical Fluid Dynamics Laboratory Climate Model version 3 (GFDL CM3). The aerosol effect causes sea surface temperature (SST) to decrease in the mid-latitude North Pacific, especially in the Kuroshio Extension region, during the past five decades (1950-2005), and this cooling effect exceeds the warming effect by the GHG increase. The STCC response to the GHG and aerosol forcing are opposite. In the GHG (aerosol) forcing run, the STCC decelerates (accelerates) due to the decreased (increased) mode waters in the North Pacific, resulting from a weaker (stronger) front in the mixed layer depth and decreased (increased) subduction in the mode water formation region. The aerosol effect on the SST, mode waters and STCC more than offsets the GHG effect. The response of SST in a zonal band around 40?N and the STCC to the combined forcing in the historical simulation is similar to the response to the aerosol forcing.WANG Liyi LIU Qinyu XU Lixiao XIE Shang-Ping 2013Journal of Ocean University of China2013,12,2:3
13Analysis of process variations impact on the single-event transient quenching in 65 nm CMOS combinational circuits显示文摘Single-event transient pulse quenching(Quenching effect)is employed to effectively mitigate WSET(SET pulse width).It enhanced along with the increased charge sharing which is norm for future advanced technologies.As technology scales,parameter variation is another serious issue that significantly affects circuit’s performance and single-event response.Monte Carlo simulations combined with TCAD(Technology Computer-Aided Design)simulations are conducted on a six-stage inverter chain to identify and quantify the impact of charge sharing and parameter variation on pulse quenching.Studies show that charge sharing induce a wider WSET spread range.The difference of WSET range between no quenching and quenching is smaller in NMOS(N-Channel Metal-Oxide-Semiconductor Field-Effect Transistor)simulation than that in PMOS’(P-Channel Metal-Oxide-Semiconductor Field-Effect Transistor),so that from parameter variation view,quenching is beneficial in PMOS SET mitigation.The individual parameter analysis indicates that gate oxide thickness(TOXE)and channel length variation(XL)mostly affect SET response of combinational circuits.They bring 14.58%and 19.73%average WSET difference probabilities for no-quenching cases,and 105.56%and 123.32%for quenching cases.WANG TianQi XIAO LiYi ZHOU Bin QI ChunHua 2014Science China(Technological Sciences)2014,57,2:2
14Overview of Thrust Ripple Suppression Technique fbr Linear Motors显示文摘Direct-drive actuators,linear motors are widely used in many industrial and military applications,particularly in high-end manufacturing due to advantages of high force density,rapid dynamic response,and low thermal losses.Permanent magnet linear synchronous motors(PMLSMs)can dramatically improve the dynamic and static performance of the motion system.However,as one of the most critical sources of error,the thrust ripple of linear motors can deteriorate performance and even excite the mechanical resonance.Thrust ripple suppression technology had received broad interest and has been researched extensively.Therefore,this paper summarizes different types of thrust ripple suppression methods and their principles are analyzed in detail.Firstly,structural optimization methods are introduced to suppress the thrust ripple and increase the precision of the thrust.Secondly,control methods are described to decrease the velocity fluctuation caused by the thrust ripple.Thirdly,a combination of structural design and control method is presented to compensate the ripple,meaning high order harmonic components are eliminated by permanent magnets(PM)skewing technology and low order harmonic are compensated by a linearization observer.Finally,conclusions are made regarding thrust ripple suppression technology and the future trend is proposed.Mingyi Wang Liyi Li Rui Yang 2016Chinese Journal of Electrical Engineering2016,2,1:2
15ANovelEndo-1,4-p-Glucanase Gene(LlpCell) Is Exclusively Expressed in Pollen and Pollen Tubes of Lilium longiflorum显示文摘A full—lerlgth cDNA(L/pCe//)encoding an endo-1,4-β-glucanase(EGase)was isolated from pollen tubes of Lilium longiflorum Thunb.by RT-PCR and RACE.The deduced protein,which iS predicted to be a compact globular protein,is of 490 amino acids.in cluding a putative 21 amino acid-signal peptide.LlpCell shares high level of homology(about50%)with plant secreted EGases,which bear apparently neither trans-membrane domain.nor cellulose—binding domain(CBD).LIpCell belongs to gycosyl hydrolase family 9.LlpOell transcripts were detected in pollen grains.germinating pollen and elongating pollen tubes with a similar level.whereas LlpCell transcripts were not detectable in all other lily tissues examined.The specific expression pattern suggests that LlpCell is confined to lily pollen germination and pollen tube elongation.ZHOUWei HiroyukiTAKEDA LIUXi—Zhen NaokiNAKAGAWA NaokiSAKIJRAI HUANGJian LIYi—Qin 2004Acta Botanica Sinica2004,46,2:2
16Enhancing Photocatalytic Performance of NH 2-UIO66 by Defective Structural Engineering显示文摘NH_(2)-UIO66(NU)is a promising photocatalyst for the reduction of Cr(VI)to low-toxic Cr(III)driven by visible light under ambient conditions.However,the main limitation in this process is the ineffi cient ligand to metal charge transfer(LMCT)of photo-excited electrons,which is caused by inherent energy gap(ΔE_(LMCT)).This study synthesized the defective NU(NUXH,where X is the molar equivalent of the modulator)with reducedΔE_(LMCT)through linkers removal via acid treatment.The electronic structure of NUX-H was systematically investigated,and the results indicated that the structural defects in NUX-H strongly altered the environment of the Zr atoms.Furthermore,they substantially lowered the energy of the unoccupied d orbitals(LUMO),which was benefi cial to effi cient LMCT,resulting in an improved photocatalytic activity of NUX-H toward high-concentration(100 mg/L)Cr(VI)reduction.Compared to NU with defect-free structure,the reducing rate of Cr(VI)was increased by 47 times.This work introduced an alternative strategy in terms of designing effi cient photocatalysts for reducing Cr(VI)under ambient conditions.Zhenmin Xu Jiazhen Cao Xiang Chen Liyi Shi Zhenfeng Bian 2021Transactions of Tianjin University2021,27,2:2
17Theoretical Study of Cr Doped into TiO_2(110) Surface显示文摘The Cr doped into TiO2(110) surface has been studied systematically by using periodic DFT/B3LYP method with slab model. It is found that doping Cr into perfect TiO2 (110) surface can reduce the value of band-gap from 3.13 to 1.16 eV, and then photocatalysis reaction may be achieved in visual light area. The results are in good agreement with the experiments.DINGKai-Ning ZHANGYong-Fan LIYi LIJun-Qian 2005Chinese Journal of Structural Chemistry2005,24,6:2
18Removal of toxic metal ions using chitosan coated carbon nanotube composites for supercapacitors显示文摘Environmental pollution and energy crisis are two major global challenges to human beings.Recovering energy from wastewater is considered to be one of the effective approaches to address these two issues synchronously.As the main pollutants in wastewater,toxic heavy metal ions are the potential candidates for energy storage devices with pseudocapacitive behaviors.In this study,toxic metal ions of Cr(VI)and Cu(II)are removed efficiently by chitosan coated oxygen-containing functional carbon nanotubes,and the corresponding equilibrium adsorption capacity is 142.1 and 123.7 mg g^(-1).Followed by carbonization of metal ions-adsorbed adsorbents,Cu-and Cr N-loaded carbon composites can be obtained.Electrochemical measurements show that the supercapacitor electrodes based on Cu-and Cr N-loaded carbon composites have specific capacitance of 144.9 and 114.9 F g^(-1)at2 m V s^(-1),with superior electrochemical properties to pure chitosan coated carbon nanotubes after carbonization.This work demonstrates a new strategy for the resource-utilization of other heavy metal ions for energy devices,and also provides a new way to turn environmental pollutants into clean energy.Pin Hao Xiaoye Ma Junfeng Xie Fengcai Lei Liyi Li Wenqian Zhu Xin Cheng Guanwei Cui Bo Tang 2018Science China Chemistry2018,61,7:2
19Long-term Hardening Characteristics of Prestressed Anchorage Grout显示文摘Grout plays an important role in the transmission and maintenance of anchoring force,and in the protection of anchorage materials against corrosion.Thus,the hardening characteristics of grout directly affect the anchoring effectivity and long-term reliability.We have excavated a prestressed anchorage which has been in service for 20 years,and have tested the grout which has worked for that long period under complicated geological conditions through strength tests and have analyzed its mineral composition using scanning electron microscopy(SEM) and X-ray diffraction(XRD).The results show that the mineral composition of the 12.5 m segment differs from other segments,and corresponds with poor coagulation characteristics of the 12.5 m segment grout.Analysis shows that unhydrated tricalcium silicate may be the reason for the localized poor coagulation.WANG Sheng CHEN Liyi HUANG Runqiu JIANG Zhaoqun WANG Yanshu 2012Journal of Mountain Science2012,9,6:2
20Advances of high-performance LiNi_(1-x-y)Co_(x)M_(y)O_(2) cathode materials and their precursor particles via co-precipitation process显示文摘Layered LiNi_(1-x-y)Co_(x)M_(y)O_(2)(M=Mn or Al)is a promising cathode material for lithium-ion batteries due to its high specific capacity and acceptable manufacturing cost.However,the polycrystalline LiNi_(1-x-y)Co_(x)M_(y)O_(2) cathode material suffers from disordered orientation of primary particles and poor geometric symmetry of secondary particles,which severely hampers the migration of Lit ions.Furthermore,the resulting anisotropy accelerates the disintegration of the secondary particle structure,significantly affecting the electrochemical performance of the polycrystalline cathode.In spite of less grain boundary,the single-crystal LiNi_(1-x-y)Co_(x)M_(y)O_(2) cathodes still suffer from severe microcracks generated by repeated planar gliding during cycling,which poses a great challenge to the cycling stability of single-crystal materials.It's worth noting that the microstructure of the cathode material is mainly inherited from its precursor.Therefore,it is necessary to deeply understand the influence of the microstructure of Ni_(1-x-y)Co_(x)M_(y)(OH)2 on the electrochemical properties of LiNi_(1-x-y)Co_(x)M_(y)O_(2) cathode materials,so as to optimize the production process of preparing high-performance cathode precursors.In this review,we summarize recent advances in the research and development of Ni-rich cathode precursor materials.Firstly,the challenges faced by the Ni-rich hydroxide precursor materials are presented,including the effect of primary particle morphology and arrangement on the electrochemical performance of cathode materials,the influence of secondary particle morphology on lithium insertion reactions in cathode,and the effect of particle size on the microcracking of single-crystal particles.Secondly,the presentation of the conventional co-precipitation reactor,the mechanism of precursor particle growth,and the influence of coprecipitation parameters are described in detail.Finally,the strategies are systematically discussed to solve the challenges of hydroxide precursors,such as the innovation and optimization on reactants,synthesis processes,and reaction equipment.To obtain satisfactory high-quality precursor materials,future work will require an in-depth understanding of the reaction mechanism,combined with simulation techniques such as flow field theory calculations to guide the synthesis of precursors.This review provides a comprehensive analysis of the current progresses on the producing technologies of highperformance cathode precursors and offers prospects for future industry developments.Wenbiao Liang Yin Zhao Liyi Shi Zhuyi Wang Yi Wang Meihong Zhang Shuai Yuan 2024Particuology2024,86,3:1
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