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| 1 | 基于轻量级深度神经网络的电磁信号调制识别技术显示文摘针对6G时代将会是移动通信与人工智能紧密结合的时代,产生数量庞大的边缘智能信号处理节点的趋势,提出了一种可部署于资源受限的边缘设备上的高效智能电磁信号识别模型。首先,通过绘制电磁信号的星座图将电磁信号具象为二维图像,并根据归一化点密度对星座图上色以实现特征增强;然后,使用二值化深度神经网络对其进行识别,在保证识别准确率的同时明显降低了模型存储开销以及计算开销。采用电磁信号调制识别问题进行验证,实验选取常用的8种数字调制信号,选择加性高斯白噪声为信道环境。实验结果表明,所提方案可以在信噪比为-6~6 d B的噪声条件下获得96.1%的综合识别率,网络模型大小仅为166 KB,部署于树莓派4B的执行时间为290 ms,相比于同规模的全精度网络,准确率提升了0.6%,模型缩减到1/26.16,运行时间缩减到1/2.37。 | 张思成 林云 涂涯 Shiwen Mao | 2020 | 通信学报2020，41，11： | 36 |
| 2 | Tissue clearing of both hard and soft tissue organs with the PEGASOS method显示文摘织物空地技术由转织物在 3 尺寸(3-D ) 启用不透明的机关和纸巾的可视化透明。当前的组织空地方法被能与每个单个协议被清除的纸巾的有限类型限制,它不可避免地导致了存在在整个身体或身体部分成像以内盲点。包括骨头和牙齿的难纸巾仍然是要清除的最困难的机关。另外,内长的荧光的损失为基于溶剂的空地方法仍然是一颗主要担心。这里,我们发展了聚乙烯乙二醇(木钉) 联系了溶剂系统(PEGASOS ) ,它将近显示了纸巾的所有类型透明、保存的内长的荧光。骨头和牙齿能被转在变清以后将近不可见。PEGASOS 方法转了透明的整个成年老鼠身体,我们对一个成年老鼠头骨头,牙齿,大脑,肌肉,和其它填写了的图象有能力没有盲目区域的纸巾。难织物透明性使我们能重建在 3-D 的未经触动的上颚,牙齿,腿节,或膝关节。另外,我们在长距离上在亚 cellular 分辨率并且到踪迹个人神经原和轴突管理了未经触动的鼠标大脑到图象。我们也通过 vertebrae 直接设想了背面的根中心。最后,我们在长骨头的髓空间以内在 3-D 揭示了神经网络的分发模式。这些结果建议 PEGASOS 方法是为一般生物医学的研究的一个有用工具。 | Dian Jing Shiwen Zhang Wenjing Luo Xiaofei Gao Yi Men Chi Ma Xiaohua Liu Yating Yi Abhijit Bugde Bo O. Zhou Zhihe Zhao Quan Yuan Jian Q. Feng Liang Gao Woo-Ping Ge Hu Zhao | 2018 | Cell Research2018，28，8： | 18 |
| 3 | Epidemic spreading behavior in local-world evolving networks显示文摘The susceptible-infected-susceptible(SIS)epidemic model is presented which can be used to study the epidemic spreading behavior in the local-world evolving network model.Local-world evolving model displays a transition from the exponential network to the scale-free network with respect to the connectivity distribution.From theoretical analyses and numerical simulations,we find that the epidemic spreading behavior on local-world networks also takes on some kind of transitional behaviors.The transitional behavior is further ver-ified by comparing the spreading behavior of local-world network with that of random and scale-free networks.Some feasible control strategies are also proposed to keep from the epidemic spreading on networks. | Chengyi Xia Zhongxin Liu Zengqiang Chen Shiwen Sun Zhuzhi Yuan | 2008 | Progress in Natural Science:Materials International2008，18，6： | 17 |
| 4 | Ustilaginoidea virens: A Fungus Infects Rice Flower and Threats World Rice Production显示文摘Rice false smut disease, which is caused by the fungus Ustilaginoidea virens, is currently one of the most devastating rice fungal diseases in the world. Rice false smut disease not only causes severe yield loss and grain quality reduction, but also threatens food safety due to its production of mycotoxins. In this review, the most recent progresses regarding the life cycle, infection processes, genome and genetic diversity, pathogenic gene and disease resistance in rice were summarized in order to provide theoretical basis for the control of U. virens. We also proposed some future directions and key questions that need to be addressed for a better understanding of the molecular mechanism that leads to rice false smut disease and the prospects for sustainable control of rice false smut. | QIU Jiehua MENG Shuai DENG Yizhen HUANG Shiwen KOU Yanjun | 2019 | Rice science2019，26，4： | 16 |
| 5 | Variations in Growth, Photosynthesis and Defense System Among Four Weed Species Under Increased UV-B Radiation显示文摘给放射与种类改变的 UV-B 的忍耐除草,并且放射能影响杂草生态学和管理。在在四棵重要农学的杂草之中的生长,光合作用和防卫系统的变化, Abutilontheophrasti Medik, Amaranthus 反曲我们 L. , Digitarlasanguinalis (L.) Scop 和 Chlorls virgata Swartz,在增加的 UV-B 放射下面(在 2.7, 5.4 和 10.8 kJ-m~ 的周围、增加的放射(-2) 。d^(-1)) 在 green-houseexperiment 被学习。在 2 星期放射以后,射击的干燥的团与为 D 增加 UV-Bradiationexcept 减少了。sanguinalis。在生物资源的减小是在形态学和生理学的变化的结果。UV-B 处理的高水平减少了叶面积,植物高度,当它在所有种增加了蜡和 UV-Babsorbing 化合物的内容时,捕捞光合的率和叶绿素内容,除了 A。反曲我们,它没显著地增加。当 UV-B 放射增加了,超级氧化物 dismutase,过氧化氢酶, ascorbate 过氧化物和抗坏血酸的内容的活动在杂草种类之中不同地变化了。D。sanguinaliswas 最容忍并且一。反曲我们对增加的 UV-B 最敏感放射。结果另外 showthatthe 二草种(D。sanguinalis 和 C。virgata ) 比二 broad-leafed 种对 UV-B 放射更容忍(一。theophrasti 和 A。反曲我们) 。吸收化合物和叶蜡的 UV-B 在二棵草杂草对 UV-B 损坏起了重要作用。全面结果建议那个杂草社区,比赛和管理将被连续臭氧弄空改变。 | Shiwen Wang Liusheng Duan Anthony Egrinya Eneji Zhaohu Li | 2007 | Journal of Integrative Plant Biology2007，49，5： | 10 |
| 6 | Large-scale real-world radio signal recognition with deep learning显示文摘In the past ten years, many high-quality datasets have been released to support the rapid development of deep learning in the fields of computer vision, voice, and natural language processing. Nowadays, deep learning has become a key research component of the Sixth-Generation wireless systems(6G) with numerous regulatory and defense applications. In order to facilitate the application of deep learning in radio signal recognition, in this work, a large-scale real-world radio signal dataset is created based on a special aeronautical monitoring system-Automatic Dependent Surveillance-Broadcast(ADS-B). This paper makes two main contributions. First, an automatic data collection and labeling system is designed to capture over-the-air ADS-B signals in the open and real-world scenario without human participation. Through data cleaning and sorting, a high-quality dataset of ADS-B signals is created for radio signal recognition. Second, we conduct an in-depth study on the performance of deep learning models using the new dataset, as well as comparison with a recognition benchmark using machine learning and deep learning methods.Finally, we conclude this paper with a discussion of open problems in this area. | Ya TU Yun LIN Haoran ZHA Ju ZHANG Yu WANG Guan GUI Shiwen MAO | 2022 | Chinese Journal of Aeronautics2022，35，9： | 9 |
| 7 | PICK1 promotes caveolin-dependent degradation of TGF-β typel receptor显示文摘与 C kinase 交往的蛋白质(PICK1 ) 1 是 α 的一个批评调停人;在神经触处的 -amino-3-hydroxy-5-methyl-4-isoxazolepropionic 酸受体(AMPAR ) trafficking。然而,它的无所不在的表达式建议它可以有另外的非神经的函数。这里,我们证明 PICK1 反对转变生长因素贝它(TGF-β) 由指向 TGF-β 发信号;打字我受体(Tβ RI ) 为降级。生物化学的分析表明 PICK1 直接与 Tβ 的 C 终点交往;经由它是的 PDZ 领域和行为的 RI 提高在 Tβ 之间的相互作用的支架蛋白质; RI 和 caveolin-1,导致提高了类脂化合物 raft/caveolae 本地化。因此, PICK1 增加 Tβ 的调停 caveolin 的 endocytosis, ubiquitination 和降级; RI。而且,在 PICK1 表示和 Tβ 之间的否定关联; RI 或 phospho-Smad2 层次在人的胸肿瘤被观察,显示那 PICK1 可以通过 TGF-β 的抑制参予乳癌开发;发信号。我们的调查结果作为 TGF-β 的一个重要否定管理者揭示 PICK1 的非神经的功能;发信号。 | Bing Zhao Qiang Wang Jun Du Shiwen Luo Jun Xia Ye-Guang Chen | 2012 | Cell Research2012，22，10： | 9 |
| 8 | Hedgehog signaling pathway and ovarian cancer显示文摘Epithelial ovarian carcinoma (EOC) is the most common form of ovarian malignancies and the most lethal gynecologic malignancy in the United States. To date, in spite of treatment to it with the extensive surgical debulking and chemotherapy, the prognosis of EOC remains dismal. Recently, it has become increasingly clear that in many instances, the signaling and molecular players that control development are the same, and when inappropriately regulated, drive tumorigenesis and cancer development. Here, we discuss the possible involvement of Hedgehog (Hh) pathway in the cellular regulation and development of cancer in the ovaries. Using the in vitro and in vivo assays developed has facilitated the dissection of the mechanisms behind Hh-driven ovarian cancers formation and growth. Based on recent studies, we propose that the inhibition of Hh signaling may interfere with spheroid-like structures in ovarian cancers. The components of the Hh signaling may provide novel drug targets, which could be explored as crucial combinatorial strategies for the treatment of ovarian cancers. | Qi Chen Guolan Gao Shiwen Luo | 2013 | Chinese Journal of Cancer Research2013，25，3： | 9 |
| 9 | Serial lumbar puncture reduces cerebrospinal fluid (CSF) infection during removal of hemorrhagic CSF in aneurysmal subarachnoid hemorrhage after endovascular coiling显示文摘The present study aimed to compare the complications and clinical outcomes of serial lumbar puncture(LP) and lumbar cerebrospinal fluid(CSF) drainage(LD) of patients with aneurysmal subarachnoid hemorrhage and provide more evidence to guide clinical management.In this retrospective study,41 and 39 aneurysmal subarachnoid hemorrhage patients were enrolled in the LP and LD group,respectively.Clinical outcomes,including CSF infection,intracerebral hemorrhage,vasospasm,hydrocephalus,death,length of stay,duration of drainage and the Glasgow Outcome Scale score were compared between the two groups.By comparing with the LP group,the LD group showed a significantly higher rate of CSF infection(P= 0.029) and shorter duration of drainage(P< 0.001).Both groups displayed similar rates of vasospasm,hydrocephalus,intracerebral hemorrhage,the Glasgow Outcome Scale score one month after endovascular coiling and length of stay(P> 0.05,respectively).In conclusion,both LD and serial LP are effective methods in the treatment of aneurysmal subarachnoid hemorrhage; besides,serial LP can reduce the incidence of CSF infection in draining hemorrhagic CSF in aneurysmal subarachnoid hemorrhage after endovascular coiling. | Chen Liang Ling Yang Shiwen Guo | 2018 | The Journal of Biomedical Research2018，32，4： | 9 |
| 10 | All-trans retinoic acid upregulates VEGF expression in glioma cells in vitro显示文摘All-trans retinoid acid (ATRA) is one of the most potent and most thoroughly studied differentiation inducers that induce the differentiation and apoptosis of glioma cells.However,the effect of ATRA on angiogenesis of glioma remains poorly understood.We examined the effect of ATRA on the expression of vascular endothelial growth factor (VEGF) in different glioma cell lines and investigated the underlying mechanism,intending to partially reveal the effects of ATRA on angiogenesis of glioma.Glioma cells were treated by ATRA at 5 and 10 μmol/L.The VEGF mRNA transcript levels were determined by real-time RT-PCR and the protein levels of VEGF in glioma cells were evaluated by Western blotting assays.Moreover,hypoxia-inducible factor-1α (HIF-1α) mRNA expression was analyzed by using real-time RT-PCR.After treatment with 5 and 10 μmol/L ATRA,the VEGF mRNA transcript levels in glioma cells increased remarkably,compared with that in the control group,and the relative protein expression of VEGF was also up-regulated.Meanwhile,the HIF-1α mRNA expression also increased.ATRA increases the expression of VEGF in glioma cells at both transcriptional and translational levels. | Chen Liang Shiwen Guo Ling Yang | 2013 | The Journal of Biomedical Research2013，27，1： | 6 |
| 11 | IL-17 sustains the plasma cell response via p38-mediated Bcl-xL RNA stability in lupus pathogenesis显示文摘Recent studies have demonstrated a central role for plasma cells in the development of autoimmune diseases,such as systemic lupus erythematosus(SLE).Currently,both the phenotypic features and functional regulation of autoreactive plasma cells during SLE pathogenesis remain largely unclear.In this study,we first found that a major subset of IL-17 receptor-expressing plasma cells potently produced anti-dsDNA IgG upon IL-17A(IL-17)stimulation in SLE patients and lupus mice.Using a humanized lupus mouse model,we showed that the transfer of Th17 cell-depleted PBMCs from lupus patients resulted in a significantly reduced plasma cell response and attenuated renal damage in recipient mice compared to the transfer of total SLE PBMCs.Moreover,long-term BrdU incorporation in lupus mice detected highly enriched long-lived BrdU+subsets among IL-17 receptor-expressing plasma cells.Lupus mice deficient in IL-17 or IL-17 receptor C(IL-17RC)exhibited a diminished plasma cell response and reduced autoantibody production with attenuated renal damage,while the adoptive transfer of Th17 cells triggered the plasma cell response and renal damage in IL-17-deficient lupus mice.In reconstituted chimeric mice,IL-17RC deficiency resulted in severely impaired plasma cell generation but showed no obvious effect on germinal center B cells.Further mechanistic studies revealed that IL-17 significantly promoted plasma cell survival via p38-mediated Bcl-xL transcript stabilization.Together,our findings identified a novel function of IL-17 in enhancing plasma cell survival for autoantibody production in lupus pathogenesis,which may provide new therapeutic strategies for the treatment of SLE. | Kongyang Ma Wenhan Du Fan Xiao Man Han Enyu Huang Na Peng Yuan Tang Chong Deng Lixiong Liu Yulan Chen Jingjing Li Shiwen Yuan Qin Huang Xiaoping Hong Dajun Hu Xiaoyan Cai Quan Jiang Dongzhou Liu Liwei Lu | 2021 | Cellular & Molecular Immunology2021，18，7： | 6 |
| 12 | Hemorrhagic Fever with Renal Syndrome — Liaoning Province, China, 1999−2018显示文摘Summary What is already known on this topic?Hemorrhagic fever with renal syndrome(HFRS)is endemic in Liaoning Province.Both Seoul and Hantaan virus are circulating in rodents,and epidemic outbreaks and sporadic cases have been recorded every year since the disease was recognized. | Cui Shang Yingwei Sun Qiangling Yin Xiaoxia Huang Xuesheng Liu Quanfu Zhang Lingling Mao Chuan Li Aqian Li Qin Wang Lina Sun Mifang Liang Shiwen Wang Dexin Li Jiandong Li | 2020 | China CDC weekly2020，2，20： | 6 |
| 13 | Mapping the immune microenvironment for mandibular alveolar bone homeostasis at single-cell resolution显示文摘Alveolar bone is the thickened ridge of jaw bone that supports teeth.It is subject to constant occlusal force and pathogens invasion,and is therefore under active bone remodeling and immunomodulation.Alveolar bone holds a distinct niche from long bone considering their different developmental origin and postnatal remodeling pattern.However,a systematic explanation of alveolar bone at single-cell level is still lacking.Here,we construct a single-cell atlas of mouse mandibular alveolar bone through single-cell RNA sequencing(scRNA-seq).A more active immune microenvironment is identified in alveolar bone,with a higher proportion of mature immune cells than in long bone.Among all immune cell populations,the monocyte/macrophage subpopulation most actively interacts with mesenchymal stem cells(MSCs)subpopulation.Alveolar bone monocytes/macrophages express a higher level of Oncostatin M(Osm)compared to long bone,which promotes osteogenic differentiation and inhibits adipogenic differentiation of MSCs.In summary,our study reveals a unique immune microenvironment of alveolar bone,which may provide a more precise immune-modulatory target for therapeutic treatment of oral diseases. | Weimin Lin Qiwen Li Danting Zhang Xiaohan Zhang Xingying Qi Qian Wang Yaqian Chen Caojie Liu Hanwen Li Shiwen Zhang Yuan Wang Bin Shao Li Zhang Quan Yuan | 2021 | Bone Research2021，9，1： | 6 |
| 14 | Surface Treatment of Crl2MoV Steel towards Long-Life Cold-Work Dies显示文摘With the rapid development of the automobile industry in China, there is an ever-increasing demand for long-life cold working dies used for punching automobile components. However, the full potential of such advanced surface engineering technologies as PVD coatings and duplex surface treatments in cold work dies has not been realized. In the present study, Crl2MoV steel has been surface engineered by single PVD Ti/TiN coating and duplex treatment combining low temperature plasma nitriding (LTPN) with PVD Ti/TiN coatings. The properties of Ti/TiN coatings in terms of surface morphology, microhardness, load bearing capacity, bonding strength and wear resistance were evaluated by microhardness, scratch and wear tests. The experimental results show that PVD Ti/TiN coatings can significantly enhance the surface load bearing capacity (especially for duplex treatments) and wear resistance of Crl2MoV steel by more than one order of magnitude. This can be mainly attributed to the hard and well-adherent PVD Ti/TiN surface coatings and strong mechanical support of the LTPN sublayer. While two-body abrasive wear prevails for uncoated Crl2MoV, the micropolishing action of the counterface dominates in surface engineered material. | SHIWen WANGJun-Li WANGZhen WANZi XULuo-Ping | 2004 | 材料热处理学报2004，25，05B： | 5 |
| 15 | Mapping Soil Electrical Conductivity Using Ordinary Kriging Combined with Back-propagation Network显示文摘Accurate mapping of soil salinity and recognition of its influencing factors are essential for sustainable crop production and soil health. Although the influencing factors have been used to improve the mapping accuracy of soil salinity, few studies have considered both aspects of spatial variation caused by the influencing factors and spatial autocorrelations for mapping. The objective of this study was to demonstrate that the ordinary kriging combined with back-propagation network(OK_BP), considering the two aspects of spatial variation, which can benefit the improvement of the mapping accuracy of soil salinity. To test the effectiveness of this approach, 70 sites were sampled at two depths(0–30 and 30–50 cm) in Ningxia Hui Autonomous Region, China. Ordinary kriging(OK), back-propagation network(BP) and regression kriging(RK) were used in comparison analysis; the root mean square error(RMSE), relative improvement(RI) and the decrease in estimation imprecision(DIP) were used to judge the mapping quality. Results showed that OK_BP avoided the both underestimation and overestimation of the higher and lower values of interpolation surfaces. OK_BP revealed more details of the spatial variation responding to influencing factors, and provided more flexibility for incorporating various correlated factors in the mapping. Moreover, OK_BP obtained better results with respect to the reference methods(i.e., OK, BP, and RK) in terms of the lowest RMSE, the highest RI and DIP. Thus, it is concluded that OK_BP is an effective method for mapping soil salinity with a high accuracy. | HUANG Yajie LI Zhen YE Huichun ZHANG Shiwen ZHUO Zhiqing XING An HUANG Yuanfang | 2019 | Chinese Geographical Science2019，29，2： | 5 |
| 16 | Synthesis of mesoporous nano-TiO_(2)doped with Sn by auto-assembly method and photo-catalytic property显示文摘A series of mesoporous nano-TiO2 material doped with Sn are synthesized by a homogenous precipitation method aided by microwave heating, using TiCl4 and SnCl4 as raw materials, urea as precipitator, active carbon as templet, and soluble starch as anti- agglomer-ating reagent. XRD results show that the precursor exists in the amorphous phase, and trans-forms to anatase structure above 400℃. TEM results show that the particle is in spherical shape and the average diameter is 20 nm. EDS results show that the measuring value of compound is in accord with the actual value of the raw materials, and the doping uniformity is good. The photo-catalytic experimental results show that the highest photo-catalytic efficiency can be ob-tained when the content of Sn is 10% (mol pecent), and the decolorization rate of navy blue dye can be as high as 100% after being illuminated by sunlight for 70 min. The photo-catalytic reac-tion is a first-order kinetic reaction. | ZHANG Meihong DING Shiwen WANG Zhenxing ZHANG Yuzhuo | 2005 | Science China Chemistry2005，48，5： | 4 |
| 17 | Deep origin of Cenozoic volcanoes in Northeast China revealed by 3-D electrical structure显示文摘The three-dimensional(3-D)electrical structure of the upper-mantle was used to examine the deep origins of and relationship among the Cenozoic volcanoes located in Northeast China(NEC).High-quality,long-period magnetotelluric(LMT)full-impedance tensor data were collected in NEC and subjected to 3-D Gauss-Newton inversion in order to construct a resistivity model.The resulting model reveals the presence of multiple localized low-resistivity anomalies(LRAs)within the high resistivity lithosphere beneath NEC.These LRAs partially coincide with Cenozoic volcanoes on the surface.Three LRAs that form a larger,annular LRA were observed in the deep upper mantle beneath the Songliao Basin,whereas vein-like LRAs were found in the asthenosphere that connect the lithosphere and deep upper mantle.Petrophysical analyses suggest that the LRAs may have been caused by fluid-induced melting.Based on our electrical model,we propose that,following dehydration of the subducted Western Pacific slab into the mantle transition zone(MTZ)beneath NEC,the released water migrated upward and caused partial melting at the top of the MTZ beneath the Songliao Basin.Under the effect of buoyancy,the melted mantle formed a thermal upwelling that caused melting of asthenosphere before diapiring at the base of the dry lithosphere.The magma then penetrated structural boundaries(such as thinner,weaker,or activated suture zones)and finally reached the Earth's surface.This melting and upwelling of hot mantle materials may have resulted in large-scale volcanism in the region throughout the Cenozoic,including the eruption of Changbai Mountain and Halaha Volcanoes.Our results suggest that the Cenozoic NEC volcanoes may all share a similar mode of genesis,and probably originated from the annular LRA in the deep upper mantle. | Shiwen LI Aihua WENG Jianping LI Xuanlong SHAN Jiangtao HAN Yu TANG Yanhui ZHANG Xueqiu WANG | 2020 | Science China Earth Sciences2020，63，4： | 4 |
| 18 | Nasal delivery of broadly neutralizing antibodies protects mice from lethal challenge with SARS-CoV-2 delta and omicron variants显示文摘Multiple new variants of severe acute respiratory syndrome coronavirus 2(SARS-Co V-2)have constantly emerged,as the delta and omicron variants,which have developed resistance to currently gained neutralizing antibodies.This highlights a critical need to discover new therapeutic agents to overcome the variants mutations.Despite the availability of vaccines against coronavirus disease 2019(COVID-19),the use of broadly neutralizing antibodies has been considered as an alternative way for the prevention or treatment of SARS-Co V-2 variants infection.Here,we show that the nasal delivery of two previously characterized broadly neutralizing antibodies(F61 and H121)protected K18-h ACE2 mice against lethal challenge with SARS-Co V-2 variants.The broadly protective efficacy of the F61 or F61/F121 cocktail antibodies was evaluated by lethal challenge with the wild strain(WIV04)and multiple variants,including beta(B.1.351),delta(B.1.617.2),and omicron(B.1.1.529)at 200or 1000 TCID_(50),and the minimum antibody administration doses(5-1.25 mg/kg body weight)were also evaluated with delta and omicron challenge.Fully prophylactic protections were found in all challenged groups with both F61 and F61/H121 combination at the administration dose of 20 mg/kg body weight,and corresponding mice lung viral RNA showed negative,with almost all alveolar septa and cavities remaining normal.Furthermore,low-dose antibody treatment induced significant prophylactic protection against lethal challenge with delta and omicron variants,whereas the F61/H121 combination showed excellent results against omicron infection.Our findings indicated the potential use of broadly neutralizing monoclonal antibodies as prophylactic and therapeutic agent for protection of current emerged SARS-Co V-2 variants infection. | Jia Lu Qiangling Yin Rongjuan Pei Qiu Zhang Yuanyuan Qu Yongbing Pan Lina Sun Ding Gao Cuiqin Liang Jingwen Yang Wei Wu Jiandong Li Zongqiang Cui Zejun Wang Xinguo Li Dexin Li Shiwen Wang Kai Duan Wuxiang Guan Mifang Liang Xiaoming Yang | 2022 | Virologica Sinica2022，37，2： | 4 |
| 19 | Crystal Plasticity Finite Element Process Modeling for Hydro-forming Micro-tubular Components显示文摘Micro-tubes manufactured by hydro-forming techniques have now been widely used in medical and microelectronics applica- tions. One of the difficulties in forming such parts is the control of localized necking in the initial stages of the deformation/forming process. A lack of microstructural information causes conventional macro-mechanics finite element(FE) tools to break down when used to investigate the localized microstructure evolution and necking encountered in micro-forming. An effort has been made to create an integrated crystal plasticity finite element(CPFE) system that enables micro-forming process simulations to be carried out easily, with the important features in forming micro-parts captured by the model. Based on Voronoi tessellation and probability theory, a virtual GRAIN(VGRAIN) system is created for generating grains and grain boundaries for micro-materials. Numerical procedures are devel- oped to link the physical parameters of a material to the control variables in a Gamma distribution. A script interface is developed so that the virtual microstructure can be input to the commercial FE code, ABAQUS, for mesh generation. A simplified plane strain CPFE modeling technique is developed and used to capture localized thinning and failure features for hydro-forming of micro-tubes. Grains within the tube workpiece, their distributions and orientations are generated automatically by using the VGRAIN system. A set of crystal viscoplasticity constitutive equations are implemented in ABAQUS/Explicit by using the user-defined material subroutine, VUMAT. Lo- calized thinning is analyzed for different microstructures and deformation conditions of the material using the CPFE modeling technique. The research results show that locations of thinning in forming micro-tubes can be random, which are related to microstructure and grain orientations of the material. The proposed CPFE technique can be used to predict the locations of thinning in forming micro-tubes. | ZHUANG Weimin WANG Shiwen BALINT Daniel LIN Jianguo | 2011 | Chinese Journal of Mechanical Engineering2011，24，1： | 4 |
| 20 | Isolation and application of predatory Bdellovibrio-and-like organisms for municipal waste sludge biolysis and dewaterability enhancement显示文摘 | Ran Yu Shiwen Zhang Zhoukai Chen Chuanyang Li | 2017 | Frontiers of Environmental Science & Engineering2017，11，1： | 4 |
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