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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 | Root–shoot competition interactions cause diversity loss after fertilization:a field experiment in an alpine meadow on the Tibetan Plateau显示文摘Aims A decrease in species diversity after fertilization is a common phenomenon in grasslands;however,the mechanism causing it remains highly controversial.The light competition hypothesis to explain loss of diversity has received much attention.The aim of the present paper was to test this hypothesis.Methods Fertilization was used to control above-and belowground resources simultaneously,while shade was used to control aboveground resource in an alpine meadow on the Tibetan Plateau.Univariate general linear models was used to estimate the effects of fertilization and shade on above-and belowground vegetation characteristics,including photosynthetically active radiation(PAR)in the understory,aboveground biomass,belowground biomass,R:S ratio,species richness and Simpson’s diversity index.Important findings PAR was similar in the understory of shaded and fertilized plots,but only fertilization reduced species richness and diversity,suggesting that light competition alone could not explain diversity loss after fertilization.The root biomass and R:S ratio had a significant increase in shaded plots,but the richness and diversity did not change,suggesting that root competition alone also could not explain diversity loss after fertilization in this community.Our results illustrated that the root–shoot competition interactions,investigated from a functional groups perspective,should be the most reasonable explanation leading to the diversity loss due to fertilization. | Wei Li Shujun Wen Wenxiang Hu Guozhen Du | 2011 | Journal of Plant Ecology2011，4，3： | 15 |
| 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 | 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 |
| 6 | A User-Centric Data Secure Creation Scheme in Cloud Computing显示文摘Due to the use of the cloud computing technology,the ownership is separated from the administration of the data in cloud and the shared data might be migrated between different clouds,which would bring new challenges to data secure creation,especially for the data privacy protection.We propose a User-centric data secure creation scheme(UCDSC) for the security requirements of resource owners in cloud.In this scheme,a data owner first divides the users into different domains.The data owner encrypts data and defines different secure managing policies for the data according to domains.To encrypt the data in UCDSC,we present an algorithm based on Access control conditions proxy re-encryption(ACC-PRE),which is proved to be master secret secure and Chosen-ciphertext attack(CCA) secure in random oracle model.We give the application protocols and make the comparisons between some existing approaches and UCDSC. | SU Mang LI Fenghua SHI Guozhen GENG Kui XIONG Jinbo | 2016 | Chinese Journal of Electronics2016，25，4： | 7 |
| 7 | High-performance rigid and flexible ultraviolet photo- detectors with single-crystalline ZnGa2O4 nanowires显示文摘ZnGa2O4 nanowires (NWs) as a ternary oxide semiconductor were successfully synthesized by a simple vapor transport method for application as high- performance ultraviolet (UV) photodetectors. A single-nanowire UV photodetector fabricated on a rigid silicon substrate exhibited excellent spectral responsivity (3,174 A/W) and high external quantum efficiency (1.1 - 106%) at 350 nm UV light illumination. A flexible single-nanowire photodetector on a polyethylene terephthalate (PET) substrate was also fabricated and showed similar properties. The as-fabricated flexible photodetector exhibited stable electrical properties and mechanical flexibility under different bending curvatures over many cycles, indicating its potential application in future flexible photoelectronic devices. | Zheng Lou Ludong Li Guozhen Shen | 2015 | Nano Research2015，8，7： | 6 |
| 8 | An analytic solution describing the visco-elastic deformation of coal pillars in room and pillar mine显示文摘Coal pillar deformation is typically nonlinear and time-dependent. The accurate prediction of this defor- mation has a vital importance for the successful implementation of mining techniques. These methods have proven very important as a way to excavate coal resources from under buildings, railways, or water bodies. Elastic and visco-elastic theory are employed with a Maxwell model to formulate an analytic solution for displacement of coal pillars in room and pillar mine. These results show that the visco-elastic solution adequately predicts the coal pillar deformation over time. We conclude that the visco-elastic solution can predict the coal pillar and roadway displacement from the measured geological parameters of the conditions in situ. Furthermore, this method would be useful for mine design, coal pillar support optimization, ground subsidence prediction, and coal pillar stability analysis. | Li Qiang XU Hui BU Wankui Zhao Guozhen | 2011 | Mining Science and Technology2011，21，6： | 5 |
| 9 | 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 |
| 10 | The autocorrelation distribution of balanced Boolean function显示文摘 | Yu ZHOU Weiguo ZHANG Juan LI Xinfeng DONG Guozhen XIAO | 2013 | Frontiers of Computer Science2013，7，2： | 4 |
| 11 | Large manipulative experiments reveal complex effects of food supplementation on population dynamics of Brandt's voles显示文摘Although food supplementation is well known to increase population density,there is still debate on the causative effects of food supplementation on reproduction,survival,and immigration.Large manipulative experiments,which exclude any confounding effects of dispersal and predation,are essential for clarifying the debate.In this study,we investigated the effects of food supplementation on Brandt's vole population dynamics and plant community in eight large enclosures(0.48 ha each) from2010 to 2014.Food supplementation showed significant positive effects on population density due to increases in recruitment;however,it showed a complex effect on survival of voles:positive in non-breeding seasons,but negative in breeding seasons.In addition,food supplementation increased the quality of plants(as reflected by increased crude protein content),but decreased the quantity of less preferred plants in experimental enclosures.Thus,food seems to have direct positive effects on small rodents through improvement of food supply and indirect negative effects through food-induced density-dependent effects,and may have long-term effects on rodents through altering plant community composition and abundance. | Baofa Yin Guoliang Li Xinrong Wan Guozhen Shang Wanhong Wei Zhibin Zhang | 2017 | Science China(Life Sciences)2017，60，8： | 4 |
| 12 | Comparative analysis of the photosynthetic physiology and transcriptome of a high-yielding wheat variety and its parents显示文摘Photosynthesis is the fundamental basis of plant growth and development,and the improvement of photosynthetic efficiency can therefore promote increased crop yields.In this study,a comparative analysis of photosynthetic physiology and transcriptome was conducted between the high photosynthetic efficient variety BN207 and its parents BN64 and ZM16.The higher chlorophyll fluorescence,chlorophyll and carotenoid contents,and Lhcb1 protein accumulation in BN207 improved photosynthetic efficiency by promoting light energy absorption and conversion.Chloroplasts being distributed more closely to the cell membrane and the higher Rubisco enzyme activity of BN207 enhanced carbon assimilation,resulting in more carbohydrate accumulation in BN207.Transcriptome analysis revealed that there were several key genes mediating the high photosynthetic efficiency of BN207:Traes CS5 D02 G364100(chlorophyllase),BGI_novel_G006617(lycopeneε-cyclase),Traes CS4 A02 G034800 and Traes CS4 A02 G035100(Zeaxanthin epoxidase),Traes CS6 B02 G122500(light-harvesting complex II chlorophyll a/b binding protein 1).These genes improved the photosynthetic efficiency of BN207 mainly by reducing chlorophyll degradation,promoting carotenoid synthesis,and increasing Lhcb1 protein accumulation.These findings provide important background information for the cultivation of wheat varieties with high photosynthetic efficiency. | Huajie Liu Qidi Zhu Xinxin Pei Guozhen Xing Xingqi Ou Hua Li | 2020 | The Crop Journal2020，8，6： | 3 |
| 13 | Community-level trait responses and intra-specific trait variability play important roles in driving community productivity in an alpine meadow on the Tibetan Plateau显示文摘Aims Human activities have dramatically increased nutrient inputs to ecosys-tems,impacting plant community diversity,composition and function-ing.Extensive research has shown that a decrease in species diversity and an increase in productivity are a common phenomenon following fertilization in grasslands ecosystem.The magnitude of the response of species diversity and above-ground net primary productivity(ANPP)to fertilization mainly depends on species traits(mean trait values)and traits variability(plasticity).Our aim of this study was to examine(i)changes of species diversity(species richness and Shannon-Wiener index)and ANPP following fertilization;(ii)which species traits or community-weighted mean(CWM)traits can determine ANPP,as expected from the‘biomass ratio hypothesis’;and(iii)the relative role of intra-specific and inter-specific trait variability in this process following fertilization.Methods We measured ANPP and four key plant functional traits:specific leaf area(SLA),leaf dry matter content(LDMC),mature plant height(MPH)and leaf nitrogen concentration(LNC)for 25 component species along a fertilization gradient in an alpine meadow on the Tibetan Plateau.In addition,trait variation of species was assessed using coefficients of variation(CV),and we calculated the ratio of the CVintra to the CVinter.Important Findings Our results showed that:(i)fertilization significantly reduced species richness and Shannon-Weiner diversity index,but sig-nificantly increased ANPP;(ii)there was a significant positive correlation between ANPP and CWM-SLA and CWM-MPH,yet there was no significant relationship between ANPP and CWM-LNC or CWM-LDMC;(iii)intra-specific variability in SLA and MPH was found to be much greater than inter-specific variability,especially at the higher fertilization levels.We con-cluded that CWM-SLA and CWM-MPH can be used to assess the impacts of species changes on ecosystem functioning,and dominant species can maximize resource use through intra-spe-cific variability in SLA and MPH to compensate for the loss of species following fertilization,therefore maintaining high com-munity productivity. | Wei Li Jie Zhao Howard E.Epstein Guanghua Jing Jimin Cheng Guozhen Du | 2017 | Journal of Plant Ecology2017，10，4： | 3 |
| 14 | Label-free detection repeatability of protein microarrays by oblique-incidence reflectivity difference method显示文摘We examine the repeatabilities of oblique-incidence reflectivity difference(OIRD) method for label-free detecting biological molecular interaction using protein microarrays.The experimental results show that the repeatabilities are the same in a given microarray or microarray-microarray and are consistent,indicating that OIRD is a promising label-free detection technique for biological microarrays. | DAI Jun LI Lin WANG JingYi HE LiPing LU HuaBin RUAN KangCheng JIN KuiJuan YANG GuoZhen | 2012 | Science China(Physics,Mechanics & Astronomy)2012，55，12： | 3 |
| 15 | 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 |
| 16 | A risk-prediction score for colorectal lesions on 12,628 participants at high risk of colorectal cancer显示文摘Background The uptake of colonoscopy is low in individuals at risk of colorectal cancer(CRC).We constructed a riskprediction score(RPS)in a large community-based sample at high risk of CRC to enable more accurate risk stratification and to motivate and increase the uptake rate of colonoscopy.Methods A total of 12,628 participants classified as high-risk according to positivity of immunochemical fecal occult blood tests or High-Risk Factor Questionnaire underwent colonoscopy.Logistic regression was used to derive a RPS and analysed the associations of the RPS with colorectal lesions,giving odds ratios(ORs)and 95%confidence intervals(CIs).Results Of the participants,men(OR=1.73,95%CI=1.58–1.90),older age(≥65 years;1.41,1.31–1.53),higher body mass index(≥28 kg/m^(2);1.22,1.07–1.39),ever smoking(1.47,1.31–1.65),and weekly alcohol use(1.28,1.09–1.52)were associated with a higher risk of colorectal lesions.We assigned 1 point to each of the above five risk factors and derived a RPS ranging from 0 to 5,with a higher score indicating a higher risk.Compared with a RPS of 0,a RPS of 1,2,3,and 4–5 showed a higher risk of colorectal lesions,with the OR(95%CI)being 1.50(1.37–1.63),2.34(2.12–2.59),3.58(3.13–4.10),and 3.91(3.00–5.10),respectively.The area under the receiver-operating characteristic curve of RPS in predicting colorectal lesions was 0.62.Conclusions Participants with an increase in the RPS of≥1 point had a significantly higher risk of colorectal lesions,suggesting the urgency for measuring colonoscopy in this very high-risk group.High-risk strategies incorporating RPS may be employed to achieve a higher colonoscopy-uptake rate. | Lixin Liang Yingru Liang Ke Li Pengzhe Qin Guozhen Lin Yan Li Huan Xu Suixiang Wang Qinlong Jing Boheng Liang Lin Xu | 2022 | Gastroenterology Report2022，10，1： | 2 |
| 17 | Reliable sensors based on graphene textile with negative resistance variation in three dimensions显示文摘The weft-knitted reduced graphene oxide(r-GO)textile that is made up of many conductive r-GO coated fibers was successfully prepared dependent on the electrospray deposition technique.Interestingly,the r-GO textile presents negative resistance variation not only in axial direction as the pressure increases but also in transverse direction as the lateral stretch increases which makes it has the advantage to fabricate the reliable sensors based on strain-resistance effect.The transverse-strain and pressure sensors based on the r-GO textiles all show the excellent sensing characteristics such as high sensitivity,reliability,and good durability,etc.The maximum gauge factors(GF)of the transverse-sensor are 27.1 and 153.5 in the x-and/-direction,respectively.And the practical detection range can up to 40%in the x-direction and 35%in the y-direction,respectively.The r-GO textile pressure sensor also shows high sensitivity for a broad pressure range that with a GF up to 716.8 kPa-1 for less than 4.5 kPa region and still has more sensitive pressure sensing characteristics even the pressure goes up to 14 kPa.Based on those good performances of r-GO textile sensors,its potential applications in human body states monitoring have been studied. | Wenpeng Han Yijun Wu He Gong Linxin Liu Junxiang Yan Mengfei Li Yunze Long Guozhen Shen | 2021 | Nano Research2021，14，8： | 2 |
| 18 | Blockchain-Based Data Sharing System for AI-Powered Network Operations显示文摘The explosive development of mobile communications and networking has led to the creation of an extremely complex system,which is difficult to manage.Hence,we propose an AI-powered network framework that uses AI technologies to operate the network automatically.However,due to the separation between different mobile network operators,data barriers between diverse operators become bottlenecks to exploit the full power of AI.In this paper,we establish a mutual trust data sharing framework to break these data barriers.The framework is based on the distributed and temper-proof attributes of blockchain.We implement a prototype based on Hyperledger Fabric.The proposed system combines supervision and fine-grained data access control based on smart contracts,which provides a secure and trustless environment for data sharing.We further compare our system with existing data sharing schemes,and we find that our system provides a better functionality. | Guozhen Zhang Tong Li Yong Li Pan Hui Depeng Jin | 2018 | Journal of Communications and Information Networks2018，3，3： | 2 |
| 19 | SecIngress:An API Gateway Framework to Secure Cloud Applications Based on N-Variant System显示文摘Based on the diversified technology and the cross-validation mechanism,the N-variant system provides a secure service architecture for cloud providers to protect the cloud applications from attacks by executing multiple variants of a single software in parallel and then checking their behaviors’consistency.However,it is complex to upgrade current Software as a Service(SaaS)applications to adapt N-variant system architecture.Challenges arise from the inability of tenants to adjust the application architecture in the cloud environment,and the difficulty for cloud service providers to implement N-variant systems using existing API gateways.This paper proposes SecIngress,an API gateway framework,to overcome the challenge that it is hard in the cloud environment to upgrade the applications based on N-variants system.We design a two-stage timeout processing method to lessen the service latency and an Analytic Hierarchy Process Voting under the Metadata mechanism(AHPVM)to enhance voting accuracy.We implement a prototype in a testbed environment and analyze the security and performance metrics before and after deploying the prototype to show the effectiveness of SecIngress.The results reveal that SecIngress enhances the reliability of cloud applications with acceptable performance degradation. | Dacheng Zhou Hongchang Chen Guozhen Cheng Weizhen He Lingshu Li | 2021 | China Communications2021，18，8： | 2 |
| 20 | Modify Cd3As2 nanowires with sulfur to fabricate self-powered NIR photodetectors with enhanced performance显示文摘Cd_(3)As_(2)nanowires(NWs)have great potential in the near-infrared(NIR)photodetection field due to their excellent optoelectronic properties as a typical Dirac semimetal.However,the existence of surface oxidization limits their photoresponse performance for practical applications.Here,we modified the surface of Cd_(3)As_(2)NWs with sulfur to prevent surface oxidizing and optimize the bandgap structure to improve the photoresponse performance.The S-modified Cd_(3)As_(2)samples existed as core/shell Cd_(3)As_(2)/CdS NWs and the corresponding single NW device showed a responsivity of 0.95 A/W in the NIR band at a 0 V bias,which is three orders of magnitude higher than that of an unmodified NW.This study provides an efficient and universally applicable way to prevent semimetals nanostructures from oxidizing and promote their optoelectronic properties. | Yongxu Yan Wenhao Ran Zhexin Li Linlin Li Zheng Lou Guozhen Shen | 2021 | Nano Research2021，14，10： | 2 |
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