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| 1 | Technology and Experiments of 42CrMo Bearing Ring Forming Based on Casting Ring Blank显示文摘Bearing ring is the crucial component of bearing. With regard to such problems as material waste, low efficiency and high energy consumption in current process of producing large bearing ring, a new process named 'casting-rolling compound forming technology' is researched by taking the typical 42CrMo slew bearing as object. Through theoretical analysis, the design criteria of the main casting-rolling forming parameters are put forward at first. Then the constitutive relationship model of as-cast 42CrMo steel and its mathematical model of dynamic recrystallization are obtained according to the results of the hot compression experiment. By a coupled thermal-mechanical finite element model for radial-axial rolling of bearing ring, the fraction of dynamic recrystallization is calculated and recrystallized grains size are predicated. Meanwhile, the effects of the initial rolling temperature and feed rate of idle roll on material microstructure evolution are analyzed. Finally, the industrial rolling experiment is designed and performed, based on the simulation results. In addition, mechanical and metallographic tests are conducted on rolled bearing ring to get the mechanical parameters and metallographic structure. The experimental data and results show that the mechanical properties of bearing ring produced by casting-rolling compound forming technology are up to industrial standard, and a qualified bearing ring can be successfully formed by employing this new technology. Through the study, a process of forming large bearing ring directly by using casting ring blank is obtained, which could provide an effective theoretical guidance for manufacturing large ring parts. It also has an edge in saving material, lowering energy and improving efficiency. | LI Yongtang JU Li QI Huiping ZHANG Feng CHEN Guozhen WANG Mingli | 2014 | Chinese Journal of Mechanical Engineering2014，27，2： | 16 |
| 2 | Ultralong-life and high-rate web-like Li4Ti5O12 anode for high-performance flexible lithium-ion batteries显示文摘 | Xianfu Wang Bin Liu Xiaojuan Hou Qiufan Wang Wenwu Li Di Chen Guozhen Shen | 2014 | Nano Research2014，7，7： | 16 |
| 3 | High-detectivity InAs nanowire photodetectors with spectral response from ultraviolet to near-infrared显示文摘InAs 是直接、狭窄的乐队差距(0.354 eV ) 材料与超离频电子活动性,并且潜在地在宽 UV-visible-near-infrared 区域的一个好 optoelectronic 设备候选人。在这个工作,我们报导 InAs 基于 nanowire 的光电探测器的制造,它在一个女人上显示出很高的 photoresponse 光谱从 300 ~ 1,100 nm 的范围。responsivity,外部量效率和设备的 detectivity 分别地被测量是有用在一台原子力量显微镜(AFM ) 之间产生的高静电的地的 nanoscopic 精确的 4.4 张 y 还原剂 graphene 氟化物(GF ) 表尖端和 GF 底层。由电场的氟的符号的减小急速地与表抵抗力与 105-1,800 nm 的宽度生产 graphene nanoribbons (GNR ) 减少了从 > 1 T ???????? ? ? | Zhe Liu Tao Luo Bo Liang Gui Chen Gang Yu Xuming Xie Di Chen Guozhen Shen | 2013 | Nano Research2013，6，11： | 12 |
| 4 | Fabrication of flexible reduced graphene oxide/Fe2O3 hollow nanospheres based on-chip micro-supercapacitors for integrated photodetecting applications显示文摘因为他们的唯一、有益的设计,同样重要的在薄片上 micropower 采购的 Micro-supercapacitors (MSC ) 在使小型化的便携式的电子设备应用程序在一块最小化的大小的芯片和优秀机械灵活性 / 稳定性以内为优化最大的功能吸引了可观的注意。在这个工作,我们基于减少的 graphene oxide/Fe 2 用一种 microelectronic 影印石版术技术的空 nanospheres 与血浆蚀刻相结合的 O 3 技术。为在薄片上 MSC 的唯一的结构的设计启用高效的改进与相比 graphene 仅仅设备,展出 11.57 F 潮慣慴祬瑳 ? 湩琠敨爠摥 ' 讟 N 湯漠 ? 的高特定的电容 ? 楮牴灯敨潮 ? 琠敨爠慥瑣潩 ? 慲整挠敯晦捩敩瑮眠獡 ? 金 ? 湡 ??? 楴敭 ? 楨桧牥琠慨 ? 桴瑡漠 ? 桴 ? 潧摬渭湡牯摯 ? 湡 ? 慣敧 ? 潧摬渭湡牯摯 ' 嬑垴窊瓲創瓛讟 N 湯 ? 景 ? 渭瑩潲桰湥汯? 敲灳 ' 虡 N | Shaosong Gu Zheng Lou Ludong Li Zhaojun Chen Xiangdong Ma Guozhen Shen | 2016 | Nano Research2016，9，2： | 12 |
| 5 | Advanced rechargeable lithium-ion batteries based on bendable ZnCo2O4-urchins-on-carbon-fibers electrodes显示文摘ZnCo2O4-urchins-on-carbon-fibers 矩阵的一个新奇的班被设计了,描绘,并且过去常制作高效的精力存储设备。我们获得了 1180 妈数慲畴敲 ?L 癯 ? ㈱? 的一个可逆的锂存储能力 ?? 牣慥楳杮倠 ? 挠湯整瑮 ?? 桳牯 ? 整浲 ??? 琠敨浲污琠敲瑡敭瑮 ? 瑡 ??? 鲖 ? 栀氠睯牥愠摮甠灰牥焠慵瑮汩獥映牯搠楡祬洠湩浩浵琠浥数爔?爔 吗?? | Bin Liu Xianfu Wang Boyang Liu Qiufan Wang Dongsheng Tan Weifeng Song Xiaojuan Hou Di Chen Guozhen Shen | 2013 | Nano Research2013，6，7： | 10 |
| 6 | A computational cognition model of perception,memory,and judgment显示文摘The mechanism of human cognition and its computability provide an important theoretical foundation to intelligent computation of visual media.This paper focuses on the intelligent processing of massive data of visual media and its corresponding processes of perception,memory,and judgment in cognition.In particular,both the human cognitive mechanism and cognitive computability of visual media are investigated in this paper at the following three levels:neurophysiology,cognitive psychology,and computational modeling.A computational cognition model of Perception,Memory,and Judgment(PMJ model for short)is proposed,which consists of three stages and three pathways by integrating the cognitive mechanism and computability aspects in a unified framework.Finally,this paper illustrates the applications of the proposed PMJ model in five visual media research areas.As demonstrated by these applications,the PMJ model sheds some light on the intelligent processing of visual media,and it would be innovative for researchers to apply human cognitive mechanism to computer science. | FU XiaoLan CAI LianHong LIU Ye JIA Jia CHEN WenFeng YI Zhang ZHAO GuoZhen LIU YongJin WU ChangXu | 2014 | Science China(Information Sciences)2014，57，3： | 10 |
| 7 | Brain-derived neurotrophic factor induces neuron-like cellular differentiation of mesenchymal stem cells derived from human umbilical cord blood cells in vitro显示文摘Human umbilical cord blood was collected from full-term deliveries scheduled for cesarean section.Mononuclear cells were isolated,amplified and induced as mesenchymal stem cells.Isolated mesenchymal stem cells tested positive for the marker CD29,CD44 and CD105 and negative for typical hematopoietic and endothelial markers.Following treatment with neural induction medium containing brain-derived neurotrophic factor for 7 days,the adherent cells exhibited neuron-like cellular morphology.Immunohistochemical staining and reverse transcription-PCR revealed that the induced mesenchymal stem cells expressed the markers for neuron-specific enolase and neurofilament.The results demonstrated that human umbilical cord blood-derived mesenchymal stem cells can differentiate into neuron-like cells induced by brain-derived neurotrophic factor in vitro. | Lei Chen Zhongguo Zhang Bing Chen Xiaozhi Liu Zhenlin Liu Hongliang Liu Gang Li Zhiguo Su Junfei Wang Guozhen Hui | 2011 | Neural Regeneration Research2011，6，13： | 8 |
| 8 | Mechanical properties and enhancement mechanisms of titanium-graphene nanocomposites显示文摘Molecular dynamics(MD)simulations of the titanium-graphene nanocomposites(TiGNCs)under uniaxial tension are carried out to investigate the mechanical properties and reinforcement mechanism of graphene in composites.It is found that introduction of mechanically robust graphene limits the strain-induced dislocation and araorphization and thereby highly improves the mechanical properties of metallic titanium that are greatly affected by the crystal stacking orientation of graphene and titanium layers.The thickness of titanium layers,interface interaction and working temperature play an important role in the mechanical strength and elastic moduli of composites.The results show the mechanical properties of TiGNCs are monotonically enhanced with reduction of the titanium layer thickness and working temperature,and the Young5s modulus obtained by MD simulation are higher than that predicted by the rule of mixture(ROM)due to consideration of interfacial interaction in computational calculation.In addition,once the critical thickness of titanium layer is reached,graphene wrinkles are induced in composites because of Poisson's effect induced large lateral compression stress in the interface region.This study provides helpful insights into fundamental understanding reinforcing mechanism of graphene and ultimately contribute to the optimal design and performance of mechanically robust graphene-based metallic composites. | Wanhong Tang Jie Zhang Jianyang Wu Jinyou Shao Peng Ding Guozhen Hou Xiaoming Chen | 2020 | Acta Mechanica Sinica2020，36，4： | 7 |
| 9 | Characterization of atomic defects on the photoluminescence in two-dimensional materials using transmission electron microscope显示文摘Two-dimensional material(2D)that possesses atomic thin geometry and remarkable properties is a star material for the fundamental researches and advanced applications.Defects in 2D materials are critical and fundamental to understand the chemical,physical,and optical properties.Photoluminescence arises in 2D materials owing to various physical phenomena including activator/dopant-induced luminescence and defect-related emissions,and so forth.With the advanced transmission electron microscopy(TEM)technologies,such as aberration correction and low voltage technologies,the morphology,chemical compositions and electronic structures of defects in 2D material could be directly characterized at the atomic scale.In this review,we introduce the applications of state-of-the-art TEM technologies on the studies of the role of atomic defects in the photoluminescence characteristics in 2D material.The challenges in spatial and time resolution are also discussed.It is proved that TEM is a powerful tool to pinpoint the relationship between the defects and the photoluminescence characteristics. | Jiayan Zhang Ye Yu Peng Wang Chen Luo Xing Wu Ziqi Sun Jianlu Wang Wei Da Hu Guozhen Shen | 2019 | InfoMat2019，1，1： | 6 |
| 10 | Zn-doping enhances the photoluminescence and stability of PbS quantum dots for in vivo high-resolution imaging in the NIR-II window显示文摘Lead sulfide(PbS)quantum dots(QDs)are important near infrared(NIR)luminescent materials with tunable and strong emission covering a broad NIR region.However,their optical properties are quite sensitive to air,water,and high temperature due to the surface oxidation,thus limiting their applications in optoelectronic devices and biological imaging.Herein,a cation-doping strategy is presented to make a series of high-quality Zn-doped PbS QDs with strong emission covering whole second near-infrared window(NIR-II,1,000-1,700 nm).First-principle calculations confirmed that Zn dopants formed dopant states and decreased the recombination energy gap of host PbS.Notably,the Zn dopants significantly improved the quantum yield,photoluminescence lifetime and thermal stability of PbS QDs.Moreover,the PEGylated Zn-doped PbS QDs emitting in the NIR-llb window(1,500-1,700 nm)realized the noninvasive imaging of cerebral vascular of mouse with high resolution,being able to distinguish blood capillary.This material not only provides a new tool for deep tissue fluorescence imaging,but is also promising for the development of other NIR related devices. | Xiulei Shi Song Chen Meng-Yao Luo Biao Huang Guozhen Zhang Ran Cui Mingxi Zhang | 2020 | Nano Research2020，13，8： | 5 |
| 11 | A Game-Theoretic Approach to Elastic Control in Software-Defined Networking显示文摘Elastic control could balance the distributed control plane in Software-Defined Networking(SDN). Dynamic switch migration has been proposed to achieve it. However, existing schemes mainly focus on how to execute migration operation, but not why. This paper designs a decision-making mechanism based on zero-sum game theory to reelect a new controller as the master for migrated switches. It first chooses a switch for migration in the heavy controller which invites its neighbors as the game players to compete for the master role of this switch in the game-playing field(GPF) which is an occasional and loose domain for game-playing. Second, based on the concept of GPF, we design a decentralized strategy to play the game and determine which player as the final master. We implement it by extending the Open Flow protocol. Finally, numerical results demonstrate that our distributed strategy can approach elastic control plane with better performance. | Hongchang Chen Guozhen Cheng Zhiming Wang | 2016 | China Communications2016，13，5： | 5 |
| 12 | Two-dimensional Ni(OH)2 nanoplates for flexible on-chip m icrosu pe rcapac itors显示文摘有集成电路的在薄片上几何学的在薄片上 microsupercapacitors (MSC ) 兼容机也能在 microelectronic 设备或作为精力存储或精力受体附件单位被用作分开的电源供应。在这个工作,我们报导灵活二维的 Ni 的制造(哦)基于 nanoplates 的 MSC,它在扫描完成了 8.80 F/cm 3 的一个特定的电容 100 mV/s 评估的 2 ,仅仅在 10,000 控告 / 解除以后失去 0.20% 它的原来的价值骑车。而且, MSC 到达了 0.59 mWh/cm 3 的精力密度和电源密度直到比得上传统的基于碳的设备的 1.80 W/cm 3, 。当使遭到了到以各种各样的条件弯曲时,灵活 MSC 展出了好电气化学的稳定性,说明象为便携精力存储的电极的有希望的申请。 | Hao Wu Kai Jiang Shaosong Gu Hong Yang Zheng Lou Di Chen Guozhen Shen | 2015 | Nano Research2015，8，11： | 5 |
| 13 | Ladder-like metal oxide nanowires: Synthesis, electrical transport, and enhanced light absorption properties显示文摘 | Bo Liang Hongtao Huang Zhe Liu Gui Chen Gang Yu Tao Luo Lei Liao Di Chen Guozhen Shen | 2014 | Nano Research2014，7，2： | 4 |
| 14 | Efficient defect-controlled photocatalytic hydrogen generation based on near-infrared Cu-In-Zn-S quantum dots显示文摘能有效地收获可见的光的光催化剂的发展为在高效率的太阳开车的氢产生的进展是必要的。此处,我们综合了由使用一个壶浇可溶的 CuInS 2(CIS ) 和 Cu-In-Zn-S (CIZS ) 量点(QD ) 水的方法。CIZS QD 被谷胱甘肽 ligands 很好使钝化并且处于水的条件是高度稳定的。我们随后作为为 photocatalytic 氢产生收获材料的一盏灯使用了这些 QD。不同于显示出极其低的效率的很小的乐队差距材料,这些新 QD 在可见、在红外线附近的区域显示显著精力变换效率。在 650 nm 的外部量效率是 1.5% ,就我们的知识而言,它是在在红外线附近的区域完成直到现在的最高的价值。 | Xiao-Yuan Liu Guozhen Zhang Hao Chen Haowen Li Jun Jiang Yi-Tao Long Zhijun Ning | 2018 | Nano Research2018，11，3： | 4 |
| 15 | Nanosecond photoelectric effects in all-oxide p-n junction of La_(0.9)Sr_(0.1)MnO_(3)/SrNb_(0.01)Ti_(0.99)O_(3)显示文摘Nanosecond (ns) photoelectric effects have been observed in all-oxide p-n junctions of La0.9Sr0.1MnO3/SrNb0.01Ti0.99O3 for the first time. The rise time was about 23 ns and the full width at half maximum was about 125 ns for the open-circuit photovoltaic pulse when the La0.9Sr0.1MnO3 thin film in the p-n junction was irradiated by a laser of ~20 ns pulse duration and 308 nm wavelength. The photovoltaic sensitivity was 80 mV/mJ for a 308 nm laser pulse. | HUANG Yanhong L(U) Huibin HE Meng ZHAO Kun CHEN Zhenghao CHENG Bolin ZHOU Yueliang JIN Kuijuan DAI Shouyu YANG Guozhen | 2005 | Science China(Physics,Mechanics & Astronomy)2005，48，3： | 4 |
| 16 | Incidence and prevalence of moyamoya disease in urban China: a nationwide retrospective cohort study显示文摘Background and objective Moyamoya disease(MMD)is an increasingly recognised cause of stroke,mainly described in East Asia.China is the largest nation in Asia,but few studies reported the epidemiology of MMD,especially at a national level.We aimed to estimate the incidence and prevalence of MMD in China.Methods We performed a population-based study using data from the national databases of Urban Basic Medical Insurance between 2013 and 2016,covering approximately 0.50 billion individuals.MMD cases were identified by diagnostic code(International Classification of Diseases,10th Revision I67.5)or related diagnostic text.Results A total of 1987 MMD patients(mean age 44.45±14.30 years,female-to male ratio 1.12)were identified,representing a national crude incidence of 0.59(95%CI:0.49 to 0.68)and a prevalence of 1.01(95%CI:0.81 to 1.21)per 100000 person-years in 2016.Rates were higher in females than in males for the incidence(0.66 vs 0.52)and prevalence(1.05 vs 0.90).And the age-specific rates showed a bimodal distribution,with the highest peak in middle-aged group and the second peak in child group.Conclusions Our results confirm that MMD is relatively common in East Asians,but the rates in China were lower than those in other East Asian countries such as Japan and Korea.The unique epidemiological features,including a relatively weak female predominance and a shift in the highest peak of incidence from children to adults,revealed new sight into MMD.Further research is expected to explore the potential pathogenesis of MMD. | Yixin Sun Guoyu Zhou Jingnan Feng Lu Chen Guozhen Liu Jinxi Wang Qingliang Wang Junyou Yu Xiwang Yang Zheng Yang Pei Gao Shengfeng Wang Siyan Zhan | 2021 | Stroke & Vascular Neurology2021，6，4： | 4 |
| 17 | Therapeutic effects of human amniotic epithelial cell transplantation on double-transgenic mice co-expressing APPswe and PS1ΔE9-deleted genes显示文摘Human amniotic epithelial cells (HAECs), which exhibit characteristics of embryonic and pluripotent stem cells, could be utilized for cell therapy without legal or ethical problems. Double-transgenic (TG) mice (n=20) and wild-type (WT) mice (n=20) were randomly assigned to two groups, respectively. The transplantation group was treated with HAECs and the control group with PBS. A six-radial arm water maze was used to assess spatial memory. Immunofluorescence was utilized to track HAEC survival. Immunohistochemistry was used to determine octamer-binding protein 4 (oct-4) and nanog expression in the HAECs. High-performance liquid chromatography (HPLC) was used to measure acetylcholine levels in the hippocampus. The density of cholinergic neurons in the basal forebrain and nerve fibers in the hippocampus was measured following acetylcholinesterase staining. Results showed that transplanted HAECs survived for at least eight weeks and migrated to the third ventricle without immune rejection. Graft HAECs also expressed the specific stem cell markers oct-4 and nanog. Compared with the control group, HAEC transplantation significantly ameliorated spatial memory deficits in TG mice, as well as increased acetylcholine levels and the number of hippocampal cholinergic neurites. Intracerebroventricular HAEC transplantation improved spatial memory in double-TG mice, and results suggested that increased acetylcholine levels in the hippocampus, released by surviving cholinergic neurites, were responsible for this improvement. | XUE ShouRu CHEN ChongFang DONG WanLi HUI GuoZhen LIU TianJun GUO Lille | 2012 | Science China(Life Sciences)2012，55，2： | 3 |
| 18 | Valency Study of Vanadium in Stone Coal of Southern China显示文摘Vanadium-bearing stone coal is a new resource of vanadium. V in stone coal mainly exists in three oxidation states: 7.84%V(Ⅲ), 72.08% Ⅴ(Ⅳ) and 20.08% Ⅴ(Ⅴ). The change and distribution of valency of Ⅴ during oxidizing roasting shows that organicmatter in the coal determines valency of Ⅴ at low temperature; at about 450℃, Ⅴ(Ⅲ) is completely oxidized to Ⅴ(Ⅳ); above500℃, temperature is the most important factor for the oxidation of Ⅴ. At 700~1000℃, 92% of Ⅴ in the coal has been oxidizedto Ⅴ(Ⅴ), at still higher temperature no more oxidation of Ⅴ takes place, an equilibrium being established. The roles of NaCl in therecovery of V2O5 from the coal were discussed. The best conditions for roasting are: the oxidation-chlorination atmosphere,temperature 800℃ for 30 minutes, ore: NaCl=100:10,ηroast reaching 90%. | Xu, Guozhen Ge, Nai'e Chen, Jianping Shen, Shaobo | 1990 | Rare Metals1990，10，2： | 3 |
| 19 | Fiber gas sensor-integrated smart face mask for roomtemperature distinguishing of target gases显示文摘小、便携式、便宜的便携煤气的传感器在人的健康并且环境监视的即时察觉有大潜在的申请。在这个工作,我们与围单人赛的碳制作了灵活纤维气体传感器 nanotube (SWCNT ) ,多围的碳 nanotube (MWCNT ) ,和 ZnO 量察觉到元素的装饰点的 SWCNT (SWCNTs@ZnO ) 。这些灵活纤维气体传感器能在房间温度被操作与好敏感和恢复时间检测目标气体。他们也展出了优异长期的稳定性,以及好设备机械弯曲能力和坚韧性。把这些灵活煤气的传感器集成到脸面具,制作的便携的聪明的脸面具能被用来有选择地检测 C 2 H 5 哦,由与不同颜色读相应 LEDs 的 HCHO,和 NH 3 。如此的脸面具在新窗户中在事情和便携 electronics.Open | Zhiyi Gao Zhoe n g Lou Shuai Chen La Li Kai Jiang Zuoling Fu Wei Han Guozhen Shen | 2018 | Nano Research2018，11，1： | 3 |
| 20 | Flexible organic-inorganic hybrid photodetectors with n-type phenyl-C61-butyric acid methyl ester (PCBM) and p-type pearl-like GaP nanowires显示文摘因为他们可以在要求灵活、小、机械的吃惊抵抗的察觉到元素的各种各样的新区域为一些提供唯一的应用,灵活光电探测器成为了当前的研究的一个焦点。在这个工作,我们在各种各样的灵活底层上设计了灵活器官无机的混合光电探测器,包括聚乙烯 terephthalate (宠物),普通透明胶带和 polydimethylsiloxane ( PDMS ),与n类型 phenyl-C <潜水艇class=“ a-plus-plus ”> 61 -butyric 酸甲基酉旨( PCBM )和p类型像珍珠的差距 nanowires ( NW )作为活跃材料。同样制作的混合设备展出了优化表演上级到用太古的差距 NW 做的设备,与一快反应时间(43 ms ) 和高开/关比率(170 ) 。在不同弯曲条件下面,灵活混合光电探测器表明了优秀灵活性和电的稳定性,它为进一步大规模的、高敏感和高速度光电探测器应用使他们很有希望。 | Gui Chen Xuming Xie Guozhen Shen | 2014 | Nano Research2014，7，12： | 3 |
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