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| 1 | A review of lithium-ion battery safety concerns:The issues,strategies,and testing standards显示文摘Efficient and reliable energy storage systems are crucial for our modern society.Lithium-ion batteries(LIBs)with excellent performance are widely used in portable electronics and electric vehicles(EVs),but frequent fires and explosions limit their further and more widespread applications.This review summarizes aspects of LIB safety and discusses the related issues,strategies,and testing standards.Specifically,it begins with a brief introduction to LIB working principles and cell structures,and then provides an overview of the notorious thermal runaway,with an emphasis on the effects of mechanical,electrical,and thermal abuse.The following sections examine strategies for improving cell safety,including approaches through cell chemistry,cooling,and balancing,afterwards describing current safety standards and corresponding tests.The review concludes with insights into potential future developments and the prospects for safer LIBs. | Yuqing Chen Yuqiong Kang Yun Zhao Li Wang Jilei Liu Yanxi Li Zheng Liang Xiangming He Xing Li Naser Tavajohi Baohua Li | 2021 | Journal of Energy Chemistry2021，30，8： | 29 |
| 2 | An SDN/NFV Based Framework for Management and Deployment of Service Based 5G Core Network显示文摘The traffic explosion and the rising of diverse requirements lead to many challenges for traditional mobile network architecture on flexibility, scalability, and deployability. To meet new requirements in the 5 G era, service based architecture is introduced into mobile networks. The monolithic network elements(e.g., MME, PGW, etc.) are split into smaller network functions to provide customized services. However, the management and deployment of network functions in service based 5 G core network are still big challenges. In this paper, we propose a novel management architecture for 5 G service based core network based on NFV and SDN. Combined with SDN, NFV and edge computing, the proposed framework can provide distributed and on-demand deployment of network functions, service guaranteed network slicing, flexible orchestration of network functions and optimal workload allocation. Simulations are conducted to show that the proposed framework and algorithm are effective in terms of reducing network operating cost. | Lu Ma Xiangming Wen Luhan Wang Zhaoming Lu Raymond Knopp | 2018 | China Communications2018，15，10： | 20 |
| 3 | Synergistic effects of expandable graphite and dimethyl methyl phosphonate on the mechanical properties, fire behavior, and thermal stability of a polyisocyanurate-polyurethane foam显示文摘In this study, a series of flame-retardant polyisocyanurate-polyurethane (PIR-PUR) foams were prepared using various concentrations (0-25% by weight) of expandable graphite (EG) and dimethyl methyl phosphonate (DMMP) (0-7% by weight). The effect of these additives on the properties of the PIR-PUR foams, including physico-mechanical, morphological, flame retardancy, and thermal stability, was studied. Increasing amounts of EG in the PIR-PUR foam caused a significant drop in the compression strength. However, DMMP caused the mechanical properties of PIR-PUR foam to improve compared to foam filled with EG alone. The flame retardancy of PIR-PUR foams containing both EG and DMMP was enhanced significantly compared to EG filled foams. Thermogravimetric analysis (TGA) indicated that EG enhances the thermal stability of PIR-PUR foams but that DMMP decreased it. The morphology of the residual char provided conclusive evidence for the weak thermal stability of foams filled with DMMP. | Hu Xiangming Wang Deming Wang Shuailing | 2013 | International Journal of Mining Science and Technology2013，23，1： | 14 |
| 4 | Modeling gross primary production of a temperate grassland ecosystem in Inner Mongolia, China, using MODIS imagery and climate data显示文摘Carbon fluxes in temperate grassland ecosystems are characterized by large inter-annual variations due to fluctuations in precipitation and land water availability. Since an eddy flux tower has been in operation in the Xilin Gol grassland, which belongs to typical temperate grassland in North China, in this study, observed eddy covariance flux data were used to critically evaluate the biophysical per- formance of different remote sensing vegetation indices in relation to carbon fluxes. Furthermore, vegetation photosynthesis model (VPM) was introduced to estimate gross primary production (GPP) of the grassland ecosystem for assessing its dependability. As defined by the input variables of VPM, Moderate Resolution Imaging Spectroradimeter (MODIS) and standard data product MOD09A1 were downloaded for calculating enhanced vegetation index (EVI) and land surface water index (LSWI). Measured air temperature (Ta) and photosynthetically active radiation (PAR) data were also included for model simulating. Field CO2 flux data, during the period from May, 2003 to September, 2005, were used to estimate the 'observed' GPP (GPPobs) for validation. The seasonal dynamics of GPP predicted from VPM (GPPVPM) was compared quite well (R2=0.903, N=111, p<0.0001) with the observed GPP. The ag- gregate GPPVPM for the study period was 641.5 g C·m?2, representing a ~6% over-estimation, compared with GPPobs. Additionally, GPP predicted from other two typical production efficiency model (PEM) represents either higher overestimation or lower underestimation to GPPobs. Results of this study demonstrate that VPM has potential for estimating site-level or regional grassland GPP, and might be an effective tool for scaling-up carbon fluxes. | WU WeiXing WANG ShaoQiang XIAO XiangMing YU GuiRui FU YuLing HAO YanBin | 2008 | Science China Earth Sciences2008，51，10： | 13 |
| 5 | Phytoplankton community from Lake Taihu,China,has dissimilar responses to inorganic and organic nutrients显示文摘To evaluate the response of phytoplankton from Lake Taihu to different types of nutrients,the phytoplankton responses were measured after adding inorganic nitrogen(N) and phosphorus(P) or decomposed algal scum(Microcystis spp.) into the lake water. Both types of nutrients promoted an increase in phytoplankton biomass as determined by chlorophyll a and algal wet weight.The addition of decomposed algal scum resulted in a significantly greater phytoplankton response than the addition of inorganic N and P alone.The dissolved inorganic N and P in the inorganic nutrient treatment were found not limit phytoplankton growth.The higher algal biomass obtained in the treatment with decomposed algal scum indicated the importance of other organic nutrients besides N and P such as trace elements,as well as the importance of the form of N since the levels of ammonia nitrogen(NH4+-N) from the decomposed algal treatment were actually higher than that of the inorganic N and P addition.Microcystis spp.(Cyanobacteria) ,Scenedesmus spp.(Chlorophyta) and Synechocystis spp.(Cyanobacteria) were the dominant taxa in the control,inorganic N and P treatment,and the decomposed algal scum treatment,respectively.Microcystis never bloomed in response to both types of nutrient additions indicating that the bloom propagation is not solely related to nutrient additions,but may be related to the absence of selective grazing from zooplankton. | Xiaodong Wang Boqiang Qin Guang Gao Yongping Wang Xiangming Tang Timothy Otten | 2010 | Journal of Environmental Sciences2010，22，10： | 11 |
| 6 | Vertical diversity of sediment bacterial communities in two different trophic states of the eutrophic Lake Taihu, China显示文摘Vertical diversity of sediment bacterial communities in 2 different trophic states(macrophyte-dominated and algae-dominated) of the large shallow eutrophic Lake Taihu,China,were investigated using denaturing gradient gel electrophoresis(DGGE) and 16S rRNA sequence analysis.Clustering analysis of DGGE profiles showed that different clusters were recognized in different depths of sediment cores in the 2 lake trophic states.Analyses of the bacterial diversity,as estimated by the Shannon index(H '),showed that different sediment layers of the macrophyte-dominated state had higher diversity than the algae-dominated state.In addition,bacterial diversity of the sediment in the macrophyte-dominated state changed abruptly throughout the layers,but bacterial diversity of the algae-dominated state decreased gradually with sediment depth.Phylogenetic analysis showed that Proteobacteria was the most abundant phylum in the middle sediment of the 2 lake trophic states.In the macrophyte-dominated state,clone sequences related to Betaproteobacteria(50.0%) were the most abundant,followed by Epsilonproteobacteria(21.1%),Acidobacteria(7.9%),Deltaproteobacteria(7.9%),Chloroflexi(7.9%),and Bacteroidetes(5.3%);whereas in the algae-dominated state,sequences affiliated with Betaproteobacteria(84.4%) were predominant,followed by Deltaproteobacteria(12.5%) and Acidobacteria(3.1%).Canonical correspondence analysis showed that organic matter and pH play key roles in driving the vertical changes of bacterial community composition. | Keqiang Shao Guang Gao Yongping Wang Xiangming Tang Boqiang Qin | 2013 | Journal of Environmental Sciences2013，25，6： | 9 |
| 7 | Hydrothermal Synthesis of Orthorhombic LiMnO_(2)Nano-Particles and LiMnO_(2)Nanorods and Comparison of their Electrochemical Performances显示文摘Orthorhombic LiMnO_(2)nanoparticles and LiMnO_(2)nanorods have been synthesized by hydrothermal methods.LiMnO_(2)nanoparticles were synthesized by simple one-step hydrothermal method.To obtain rod-like LiMnO_(2),γ-MnOOH nanorods were first synthesized and then the H+ions were completely replaced by Li+resulting in LiMnO_(2)nanorods.Their electrochemical performances were thoroughly investigated by galvanostatic tests.Although the LiMnO_(2)nanoparticles have smaller size than LiMnO_(2)nanorods,the latter exhibited higher discharge capacity and better cyclability.For example,the discharge capacities of LiMnO_(2)nanorods reached 200 mA·h/g over many cycles and remained above 180 mA·h/g after 30 cycles.However,the maximum capacity of LiMnO_(2)nanoparticles was only 170 mA·h/g and quickly decreased to 110 mA·h/g after 30 cycles.Nanorods with one-dimensional electronic pathways favor the transport of electrons along the length direction and accommodate volume changes resulting from charge/discharge processes.Thus the morphology of LiMnO_(2)may play an important role in electrochemical performance. | Xiaoling Xiao Li Wang Dingsheng Wang Xiangming He Qing Peng Yadong Li | 2009 | Nano Research2009，2，12： | 8 |
| 8 | Mobile-Edge Computing Framework with Data Compression for Wireless Network in Energy Internet显示文摘Under the situations of energy dilemma, energy Internet has become one of the most important technologies in international academic and industrial areas. However, massive small data from users, which are too scattered and unsuitable for compression, can easily exhaust computational resources and lower random access possibility, thereby reducing system performance. Moreover, electric substations are sensitive to transmission latency of user data, such as controlling information. However, the traditional energy Internet usually could not meet requirements. Integrating mobile-edge computing makes energy Internet convenient for data acquisition,processing, management, and accessing. In this paper, we propose a novel framework for energy Internet to improve random access possibility and reduce transmission latency. This framework utilizes the local area network to collect data from users and makes conducting data compression for energy Internet possible. Simulation results show that this architecture can enhance random access possibility by a large margin and reduce transmission latency without extra energy consumption overhead. | Luning Liu Xin Chen Zhaoming Lu Luhan Wang Xiangming Wen | 2019 | Tsinghua Science and Technology2019，24，3： | 7 |
| 9 | Nanoimprint lithography for the manufacturing of flexible electronics显示文摘Flexible electronics have received considerable attention in academies and industries for their promising applications in enormous fields, such as flexible displays, wearable sensors, artificial skins, and flexible energy devices. Challenges remain in developing a flexible and scalable manufacturing method to facilitate the fabrication of multi-functional structures in a flexible electronic system. Nanoimprint lithography is a high resolution and low-cost approach to fabricate nanostructures over a large area. This paper reviews recent progress of nanoimprint lithography and its applications in flexible electronics. The basic principles, classification, research focus, and critical issues of nanoimprint lithography are elaborated. Then, the advantages of nanoimprint lithography are demonstrated in several typical applications related to flexible electronics, including conductive films, optoelectronic devices, flexible sensors, energy harvesting and storage devices, and bioinspired electronic devices. Finally,the challenges and perspectives of nanoimprint lithography in flexible electronic systems are discussed. | SHAO JinYou CHEN XiaoLiang LI XiangMing TIAN HongMiao WANG ChunHui LU BingHeng | 2019 | Science China(Technological Sciences)2019，62，2： | 6 |
| 10 | 基于近红外光谱法的人工林杨木木质素含量预测显示文摘用近红外光谱法对人工林杨木的木质素含量进行了快速测定,采用国家标准方法测定了42个杨木木材样品的酸不溶木质素含量,并用近红外光谱仪(LabSpecProFR/A114260)测定相应的光谱。在350~2500nm、1300~2050nm、2050—2500nm3个不同的光谱区域,采用未处理、Baseline、一阶导数、二阶导数等光谱的预处理方法,并采用PLSl、PLS2、PCR等3种不同的建模方法,建立了相应的校正模型与交互验证模型。结果表明:当光谱区域为l300~2050nm,光谱数据未进行预处理,采用PLS2的建模方法,主成分数为lO时,建立的校正模型预测效果最佳。校正模型的相关系数r=0.9685,均方根误差为0.0064,标准误差为0.0066;验证模型的相关系数r=0.6553,均方根误差为0.0202,标准误差为0.0205。采用建立的模型对未参与建模的样本进行预测,其预测结果与实测结果之间的相关系数为0.7665。 | 刘镇波 孙凤亮 WANG Xiangming 沈晓燕 王鹏 薛占川 刘一星 | 2013 | 南京林业大学学报(自然科学版)2013，37，6： | 6 |
| 11 | Mapping paddy rice distribution using multi-temporal Landsat imagery in the Sanjiang Plain, northeast China显示文摘稻米饭分发的信息为食物生产和甲烷排放计算是必要的。基于物候学的算法在由识别唯一的泛滥印射稻稻田被利用了,移植的幼苗用多时间的中等分辨率(到 1 km 的 500 m ) 分阶段执行图象。在这研究,我们开发了简单算法用多时间的 Landsat 形象在地区性的规模在好分辨率识别稻米饭。从 2010-2012 的十六幅 Landsat 图象被用来在 Sanjiang 平原产生 30 m 稻米饭地图,在中国的主要的稻米饭耕作区域的东北 Chinaone。三个植被索引,规范的差别植被索引(NDVI ) ,提高的植被索引(EVI ) ,和陆地表面浇索引(LSWI ) ,被用来在充满 / 移植并且成熟的阶段期间识别稻田。结果的基于 Landsat 的稻米饭地图上的稻米饭的用户和制片人精确性分别地是 90% 和 94% 。基于 Landsat 的稻米饭地图是在国家陆地盖子数据集上的稻米饭层上的改进,它在好决定的图象上通过视觉解释和数字化被产生。农业普查数据实质地少报稻米饭区域,关于它为食物上的研究的使用的涨的严肃的担心安全。 | Cui JIN Xiangming XIAO Jinwei DONG Yuanwei QIN Zongming WANG | 2016 | Frontiers of Earth Science2016，10，1： | 5 |
| 12 | Shape Control of CoO and LiCoO_(2) Nanocrystals显示文摘Shape control of nanocrystals has become a significant subject in materials science.In this work,we describe a convenient way to achieve morphology-controllable synthesis of CoO nanocrystals including octahedrons and spheres as well as LiCoO_(2) polyhedrons and spheres.In particular,we explain the formation of CoO octahedrons exposing only high-energy(111)facets using theoretical calculations;these should also be a useful tool for directing future face-controlled preparation of other nanocrystals.More importantly,the as-obtained LiCoO_(2) nanocrystals showed different electrochemical performance depending on their morphology,indicating that Li-insertion/deintercalation dynamics might be crystal face-sensitive. | Dingsheng Wang Xiaoling Ma Yanggang Wang Li Wang Zhongying Wang Wen Zheng Xiangming He Jun Li Qing Peng Yadong Li | 2010 | Nano Research2010，3，1： | 4 |
| 13 | Effect of direct current pulse stimulating acupoints of JiaJi (T10-L3) and Ciliao (BL 32) with Han's Acupoint Nerve Stimulator on labour pain in women: a randomized controlled clinical study显示文摘OBJECTIVE: To assess the clinical effect and safety of direct current(DC) pulse produced by Han's Acupoint Nerve Stimulator in reduction(HANS) of labor pain.METHODS: Totally 120 participants were enrolled in this clinical trial, and were randomly divided into4 groups including: HANS group, patient controlled intravenous analgesia(PCIA) group, patient-controlled epidural analgesia(PCEA) group and control group. The HANS group was treated by stimulating the acupoints of Jia Ji(T10-L3) and Ciliao(BL 32)with DC pulse of 100 Hz and 15-30 m A produced by a portable battery-powered Han's Acupoint Nerve Stimulator for 30 min. The PCIA group was intravenously infused Ondansetron(8 mg) for 5 min,then tramadol injection(1.5 mg/kg) was slowly dripped by using Baxter APⅡ electronic pump with50 m L tramadol(0.70%) + ondansetron(8 mg),background infusion 2 m L/h, PCA dose of 2 m L,lockout interval of 10 min. In PCEA group, women received intrathecal injection ropivacaine(3 mg) in L2-3, and epidural catheter was connected to Baxter APⅡ electronic pump, with 100 m L Ropivacaine(0.1%) and Sufentanil(50 ug), background infusion5 m L, Patient controlled analgesia(PCA) dose of 5m L, lockout interval of 10 min. The control group was not received analgesia. The visual analogue scale(VAS), stage and manner of labor, Apgar score of newborn, neonatal weights, oxytocin dosage,postpartum hemorrhage and side effects were monitored in all groups.RESULTS: The vital signs were all stable in the four analgesic groups. After analgesia, there was statistical difference in VAS score between HANS group and control group, between PCEA group and the control group, between PCIA group and control group. The analgesic effect in the PCEA group was significantly better than that of other two groups.The second stage of labor in the PCEA group was longer than the other three groups, showing significant difference between them. The Apgar score of newborn 1min after birth in the PCIA group was slightly lower than that of the other two groups,showing significant difference between them. The neonatal weights between four groups were not significantly different. The rate of cesarean sectionin the control group was significantly higher than that of the labor analgesia group, there was statistically difference in four groups. The number of PCIA group that used oxytocin was lower than that of other three groups. There was no significant difference in postpartum hemorrhage between four groups. The side effects of the PCEA group were itching, uroschesis and neonatal asphyxia and PCIA group were nausea and vomiting and neonatal asphyxia. However, fewer side effects were observed in the HANS group.CONCLUSION: The DC pulse produced by HANS may be a non-pharmacological alternative to labor pain with fewer side effects. | Liu Ye Xu Mingjun Che Xiangming He Junqin Guo Dandan Zhao Guosheng Zhang Guogang Zhang Shuo Kang Kai Zhang Chunlei Wang Yinan Li Shan Zhang Qinglin Xu Li Zhang Ming Han Bin Jing Yumiao Zhang Ning | 2015 | Journal of Traditional Chinese Medicine2015，35，6： | 4 |
| 14 | The principle of measuring unusual change of underground mass by optical astrometric instrument显示文摘Optical observations from a ground-based astrometric instrument provide a unique set of data sensitive to variations of local plumb line, which represent the change of local gravitational field on the ground. The local gravitational change could be caused by density variation or movement of underground mass in addition to tidal action. Earthquake was found to be related with gravitational change. A seismic zone could have abnormal underground material density, causing the variation of plume line on the ground. In this frame, the astrometric telescope can measure the variation of local plumb line by observing the local astronomical longitudes and latitudes from stars in the Hipparcos catalog. In this study, we estimate the deflection angle of the plumb line on a ground site, and give a relation between the angle, abnormal mass and site distance (depth and horizontal distance). Then we derive the abnormality of underground material density using the plumb lines measured at different sites, and study the earthquake gestation, development and occurrence. Using the deflection angles of plumb lines observed at two sites, we give a method to calculate the mass and the center of gravity of underground materials. We also estimate the abnormal masses of latent seismic zones with different energy, using thermodynamic relations, and introduce a new optical astrometric instrument we had developed. | Wang Jiancheng Chen Linfei Yang Lei Cheng Xiangming Su Jie Li Binghua Mao Wei Tie Qiongxian | 2012 | Geodesy and Geodynamics2012，3，4： | 4 |
| 15 | Confining ultrafine Li3P nanoclusters in porous carbon for highperformance lithium-ion battery anode显示文摘High-capacity lithium-containing alloy anodes(e.g.,Li4.4Si,Li4.4Sn,and Li3P)enable lithium-free cathodes(e.g.,Sulfur,V2O5,and FeF3)to produce next-generation lithium-ion batteries(LIBs)with high energy density.Herein,we design a Li3P/C nanocomposite with Li3P ultrafine nanodomains embedded in micrometer-scale porous carbon particles.Benefiting from the unique micro/nanostructure of the Li3P/C nanocomposite,electrons transfer rapidly through the conductive pathway provided by the porous carbon framework and the volume change between Li3P and P is confined in the nanopores of the carbon,which avoids the collapse of the whole Li3P/C composite particles.As expected,the as-achieved Li3P/C nanocomposite provided a high available lithium-ion capacity of 791 mAh/g(calculated based on the mass of Li3P/C)at 0.1 C during the initial delithiation process.Meanwhile,the Li3P/C nanocomposite showed 75%of its 0.5 C capacity at 6 C and stable cycling stability. | Eryang Mao Wenyu Wang Mintao Wan Li Wang Xiangming He Yongming Sun | 2020 | Nano Research2020，13，4： | 3 |
| 16 | Effect of dosage of expandable graphite,dimethyl methylphosphonate,triethanolamine,and isocyanate on fluidity,mechanical,and flame retardant properties of polyurethane materials in coal reinforcement显示文摘In this study,orthogonal experiments were conducted to investigate the influence of expandable graphite(EG),dimethyl methylphosphonate(DMMP),triethanolamine(TEA),and isocyanate content on the compressive and bonding strengths,oxygen index,and fluidity of rigid polyurethane foam(RPUF).The results revealed that EG significantly increased the oxygen index of RPUF,enlarged the diameter of foam cells,and decreased the cell-closed content in foam;thus,leading to a pressure drop in RPUF.However,excessive EG was capable of reducing the fluidity of polyurethane slurry.TEA exhibited significant influence on the compressive strength of RPUF,which dropped initially,and then increased.DMMP had a remarkable effect on the flame retardant property and compressive strength of RPUF.Compressive strength of RPUF initially displayed an increase followed by a decrease with increasing dosage of DMMP,and achieved the maximum value at DMMP dosage of 4%.DMMP could effectively reduce the diameter of RPUF cells leading to an increase in the percentage of close area in foam.DMMP displayed the flame-retardation effects mainly in the gas phase leading to a significant enhancement in the oxygen index of RPUF.Moreover,the compressive strength and bonding strength of RPUF decrease significantly with the increase of isocyanate content due to the increased blowing efficiency by the CO_2.The oxygen index and flowing length of foam increased with the increase in isocyanate dosage. | Hu Xiangming Wang Deming Cheng Weimin | 2016 | International Journal of Mining Science and Technology2016，26，2： | 3 |
| 17 | Boron-doped Ketjenblack based high performances cathode for rechargeable Li–O2 batteries显示文摘Boron-doped Ketjenblack is attempted as cathode catalyst for non-aqueous rechargeable Li–O_2 batteries. The boron-doped Ketjenblack delivers an extremely high discharge capacity of 7193 m Ah/g at a current density of 0.1 m A/cm2, and the capacity is about 2.3 times as that of the pristine KB. When the batteries are cycled with different restricted capacity, the boron-doped Ketjenblack based cathodes exhibits higher discharge platform and longer cycle life than Ketjenblack based cathodes. Additionally, the boron-doped Ketjenblack also shows a superior electrocatalytic activity for oxygen reduction in 0.1 mol/L KOH aqueous solution. The improvement in catalytic activity results from the defects and activation sites introduced by boron doping. | Yueyan Li Li Wang Xiangming He Bin Tang Yunxue Jin Jianlong Wang | 2016 | Journal of Energy Chemistry2016，25，1： | 3 |
| 18 | Surface modification of polyolefin separators for lithium ion batteries to reduce thermal shrinkage without thickness increase显示文摘Surface chemical modification of polyolefin separators for lithium ion batteries is attempted to reduce the thermal shrinkage, which is important for the battery energy density. In this study, we grafted organic/inorganic hybrid crosslinked networks on the separators, simply by grafting polymerization and condensation reaction. The considerable silicon-oxygen crosslinked heat-resistance networks are responsible for the reduced thermal shrinkage. The strong chemical bonds between networks and separators promise enough mechanical support even at high temperature. The shrinkage at 150 C for 30 min in the mechanical direction was 38.6% and 4.6% for the pristine and present graft-modified separators, respectively. Meanwhile, the grafting organic-inorganic hybrid crosslink networks mainly occupied part of void in the internal pores of the separators, so the thicknesses of the graft-modified separators were similar with the pristine one. The half cells prepared with the modified separators exhibited almost identical electrochemical properties to those with the commercial separators, thus proving that, in order to enhance the thermal stability of lithium ion battery, this kind of grafting-modified separators may be a better alternative to conventional silica nanoparticle layers-coated polyolefin separators. | Peng Zhao Juping Yang Yuming Shang Li Wang Mou Fang Jianlong Wang Xiangming He | 2015 | Journal of Energy Chemistry2015，24，2： | 3 |
| 19 | Quality Control:Internal Defects Formation Mechanism of Selective Laser Melting Based on Laser-powder-melt Pool Interaction:A Review显示文摘Selective laser melting(SLM)is a 3D printing technology with a high near-net-shape ability and forming accuracy.However,the inevitable internal defects significantly hinder its development.Therefore,it is essential to fully understand the causes of internal defects in SLM processing and minimize the defects to achieve quality control accordingly.This work reviews the recent studies on internal defects in SLM,presenting the main internal defects of SLM as impurities,lack of fusion,gas pores,and micro-crack.These internal defects occur on the various phenomena in the laser-powder-melt pool(LPMP)stage.The formation of SLM internal defects is mainly affected by oxidation,denudation,balling,spatter,and keyholes;here,balling,spattering,and the keyhole phenomenon are the main factors causing internal defects in LPMP.Hence,this paper focuses on reviewing the balling effect,spatter behavior,and keyhole phenomenon,introducing the action mechanism of the above three phenomena under different process conditions.Additionally,the spatter behavior when forming internal defects is proposed.This review also considers the correlation between the spatter behavior and keyhole phenomenon and makes an important contribution to understanding and reducing SLM internal defects.It presents a reliable opinion on real-time monitoring and machine intelligent learning for SLM processing in the future,as well as supporting a systematic thinking for the suppression of defect formation in SLM. | Guang Yang Yilian Xie Shuo Zhao Lanyun Qin Xiangming Wang Bin Wu | 2022 | Chinese Journal of Mechanical Engineering(Additive Manufacturing Frontiers)2022，1，3： | 2 |
| 20 | Charge/discharge characteristics of sulfur composite cathode materials in rechargeable lithium batteries显示文摘 | Xiangming He Weihua Pu Jianguo Ren Li Wang Jiulin Wang Changyin Jiang Chunrong Wan | 2007 | Electrochimica Acta2007，，25： | 2 |
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