维普中文期刊产品整合服务
121篇 您的检索式:作者名="Le Cao"
    题名 作者 年代 出处 被引量
1A Review on Swarm Intelligence and Evolutionary Algorithms for Solving Flexible Job Shop Scheduling Problems显示文摘Flexible job shop scheduling problems(FJSP)have received much attention from academia and industry for many years.Due to their exponential complexity,swarm intelligence(SI)and evolutionary algorithms(EA)are developed,employed and improved for solving them.More than 60%of the publications are related to SI and EA.This paper intents to give a comprehensive literature review of SI and EA for solving FJSP.First,the mathematical model of FJSP is presented and the constraints in applications are summarized.Then,the encoding and decoding strategies for connecting the problem and algorithms are reviewed.The strategies for initializing algorithms?population and local search operators for improving convergence performance are summarized.Next,one classical hybrid genetic algorithm(GA)and one newest imperialist competitive algorithm(ICA)with variables neighborhood search(VNS)for solving FJSP are presented.Finally,we summarize,discus and analyze the status of SI and EA for solving FJSP and give insight into future research directions.Kaizhou Gao Zhiguang Cao Le Zhang Zhenghua Chen Yuyan Han Quanke Pan 2019IEEE/CAA Journal of Automatica Sinica2019,6,4:32
2Research progress on silicon/carbon composite anode materials for lithium-ion battery显示文摘Silicon(Si) has been considered as one of the most promising anode material for the next generation lithium-ion batteries(LIBs) with high energy densities, due to its high theoretical capacity, abundant availability and environmental friendliness. However, silicon materials with low intrinsic electric and ionic conductivity suffer from huge volume variation during lithiation/delithiation processes leading to the pulverization of Si and subsequently resulting in severe capacity fading of the electrodes. Coupling of Si with carbon(C) realizes a favorable combination of the two materials properties, such as high lithiation capacity of Si and excellent mechanical and conductive properties of C, making silicon/carbon composite(Si/C) ideal candidates for LIBs anodes. In this review, recent progresses of Si/C materials utilized in LIBs are summarized in terms of structural design principles, material synthesis methods, morphological characteristics and electrochemical performances by highlighting the material structures. The mechanisms behind the performance enhancement are also discussed. Moreover, other factors that affect the performance of Si/C anodes, such as prelithiation, electrolyte additives, and binders, are also discussed. We aim to present a full scope of the Si/C-based anodes, and help understand and design future structures of Si/C anodes in LIBs.Xiaohui Shen Zhanyuan Tian Ruijuan Fan Le Shao Dapeng Zhang Guolin Cao Liang Kou Yangzhi Bai 2018Journal of Energy Chemistry2018,27,4:29
3Expenditure and financial burden for the diagnosis and treatment of colorectal cancer in China:a hospital.based,multicenter,cross-sectional survey显示文摘Background: The increasing prevalence of colorectal cancer(CRC) in China and the paucity of information about relevant expenditure highlight the necessity of better understanding the financial burden and effect of CRC diagnosis and treatment. We performed a survey to quantify the direct medical and non-medical expenditure as well as the resulting financial burden of CRC patients in China.Methods: We conducted a multicenter, cross-sectional survey in 37 tertiary hospitals in 13 provinces across China between 2012 and 2014. Each enrolled patient was interviewed using a structured questionnaire. All expenditure data were inflated to the 2014 Chinese Yuan(CNY; 1 CNY = 0.163 USD). We quantified the overall expenditure and financial burden and by subgroup(hospital type, age at diagnosis, sex, education, occupation, insurance type, household income, clinical stage, pathologic type, and therapeutic regimen). We then performed generalized linear modeling to determine the factors associated with overall expenditure.Results: A total of 2356 patients with a mean age of 57.4 years were included, 57.1 % of whom were men; 13.9% of patients had stage I cancer; and the average previous-year household income was 54,525 CNY.The overall average direct expenditure per patient was estimated to be 67,408 CNY, and the expenditures for stage Ⅰ, Ⅱ, Ⅲ, and Ⅳ disease were 56,099 CNY, 59,952 CNY, 67,292 CNY, and 82,729 CNY, respectively. Non-medical expenditure accounted for 8.3%of the overall expenditure. The 1-year out-of-pocket expenditure of a newly diagnosed patient was 32,649 CNY, which accounted for 59.9% of their previous-year household income and caused 75.0% of families to suffer an unmanageable financial burden. Univariate analysis showed that financial burden and overall expenditure differed in almost all subgroups(P < 0.05), except for sex. Multivariate analysis showed that patients who were treated in specialized hospitals and those who were diagnosed with adenocarcinoma or diagnosed at a later stage were likely to spend more,whereas those with a lower household income and those who underwent surgery spent less(all P < 0.05).Conclusions: For patients in China, direct expenditure for the diagnosis and treatment of CRC seemed catastrophic,and non-medical expenditure was non-ignorable. The financial burden varied among subgroups, especially among patients with different clinical stages of disease, which suggests that, in China, CRC screening might be cost-effective.Hui-Yao Huang Ju-Fang Shi Lan-Wei Guo Ya-Na Bai Xian-Zhen Liao Guo-iangLiu A-Yan Mao Jian-Song Ren Xiao-Jie Sun Xin-Yu Zhu Le Wang Bing-Bing Song Ling-Bin Du Lin Zhu Ji-Yong Gong Qi Zhou Yu-Qin Liu Rong Cao Ling Mai Li Lan Xiao-Hua Sun Ying Ren Jin-Yi Zhou Yuan-Zheng Wang Xiao Qi Pei-An Lou Dian Shi Ni Li Kai Zhang Jie He Min Dai 2017Chinese Journal of Cancer2017,36,8:25
4A new iterative algorithm for geolocating a known altitude target using TDOA and FDOA measurements in the presence of satellite location uncertainty显示文摘This paper considers the problem of geolocating a target on the Earth surface whose altitude is known previously using the target signal time difference of arrival(TDOA) and frequency difference of arrival(FDOA) measurements obtained at satellites. The number of satellites available for the geolocation task is more than sufficient and their locations are subject to random errors. This paper derives the constrained Crame′r-Rao lower bound(CCRLB) of the target position, and on the basis of the CCRLB analysis, an approximately efficient constrained maximum likelihood estimator(CMLE) for geolocating the target is established. A new iterative algorithm for solving the CMLE is then proposed, where the updated target position estimate is shown to be the globally optimal solution to a generalized trust region sub-problem(GTRS) which can be found via a simple bisection search. First-order mean square error(MSE) analysis is conducted to quantify the performance degradation when the known target altitude is assumed to be precise but indeed has an unknown but deterministic error. Computer simulations are used to compare the performance of the proposed iterative geolocation technique with those of two benchmark algorithms. They verify the approximate efficiency of the proposed algorithm and the validity of the MSE analysis.Cao Yalu Peng Li Li Jinzhou Yang Le Guo Fucheng 2015Chinese Journal of Aeronautics2015,28,5:24
5Inflammatory airway features and hypothalamic-pituitary- adrenal axis function in asthmatic rats combined with chronic obstructive pulmonary disease显示文摘背景支气管的气喘(BA ) 和长期的妨碍的肺的疾病(COPD ) 两个都是有不同特征的煽动性的航线疾病。然而,有许多病人,受不了 BA 和 COPD。这研究是在与科普德梅索兹·布朗挪威( BN )老鼠相结合的气喘的老鼠评估煽动性的航线特征和 hypothalamic-pituitary-adrenal ( HPA )轴功能的变化被用来为 BA , COPD 和 COPD+BA.These 的煽动性的航线疾病建模三个模型关于临床的症状被比较并且评估,肺的组织病理学说,航线 hyperresponsiveness ( AHR ),煽动性的 cytokines 和煽动性的航线展示的 HPA 轴 function.Results 和 HPA 轴趣事在这个模型组的老鼠显示出煽动性的疾病 BA 和 COPD 的特征。在这个模型组的煽动性的 cytokines 的表示可能起来或 downregulated 当两个疾病过程是在场的时。在这个模型组释放荷尔蒙 mRNA 和皮质脂酮的 corticotrophin 的层次显著地是两个在控制组比那些减少了(P < 0.05 ).Conclusions BN 老鼠能被用作 COPD+BA 的一个动物模型。由评估这个动物模型,我们发现在在这个模型组的老鼠的发炎的特征似乎被夸大。在在这个模型组的老鼠的 HPA 轴功能被扰乱了或损害,它在 hypothalamic 水平是突出的。CAI Cui ZHANG Hong-ying LE Jing-jing DONG Jing-cheng CUI Yan XU Chang-qing LIU Bao-jun WU Jin-feng DUAN Xiao-hong CAO Yu-xue 2010Chinese Medical Journal2010,,13:14
6The distribution characteristics of heavy metals in Guiyang urban soils显示文摘Guiyang is located in southwestern China,which is a famous tourism city,and is awarded the title of'the Summer Capital of China'.A study on heavy metals in Guiyang urban soils was conducted.The results showed that the concentrations of Cd,Cu,Ni,Pb and Zn in Guiyang urban soils are significantly higher than their background values and Cu,Zn and Pb in Guiyang soils are accumulated seriously.The distribution characteristics of heavy metals in 3 districts are described as follows:the level of heavy metals in soils follows the order of Nanming District> Yunyan District>Xiaohe District.The spatial distribution of metals in urban soils of Guiyang shows that the level of metals in the central and eastern parts of Guiyang is relatively high,and its characteristics are attributed to the influence of commercial activities,heavy traffic and industrial emission.Compared with some other cities in China,Guiyang is characterized by relatively high accumulation level of Cd,Cu,and Zn in its soils.LI Xiaoyan CAO Yijin QI Le SHU Fu 2012Chinese Journal Of Geochemistry2012,31,2:14
7Molecular mechanism of icariin on rat asthmatic model显示文摘在气喘的老鼠和 LPS 的干预的航线发炎上的 icariin 的背景效果导致了发炎与 icariin 的 machanism 被介入。我们的学习试图在 Th1/Th2 cytokine 表示和它的 mechanism.Methods 的 导致ovalbumin 的不平衡上观察 icariin 的效果六十只男 SD 老鼠随机被划分成控制组( PBS ),气喘组( ovalbumin (卵) -induced),dexamethasone 组,和 OVA+icariin 低、中等、高的剂量组( 5 , 10 , 20 mg/kg ,分别地)。每个组有十只老鼠。卵促进感受性的模型是一个老鼠气喘模型。连接酶的 immunosorbent 试金( ELISA )方法被用来在 interleukin-4 ( IL-4 )上观察 icariin 的效果,在老鼠染色的肺 tissue.Immunohistochemical 的 inerferon Y ( IFN-Y )被使用在 T 房间(T赌注)和 gatabinding 蛋白质上检测 icariin 的干预效果 3 ( GATA-3 )在里面老鼠肺的织物。实时 RT-PCR 被用来在老鼠在 T 赌注和 GATA-3 mRNA 表示上观察 icariin 的干预效果肺的织物和怒气淋巴细胞。西方的弄污被用来在老鼠在T赌注, GATA-3 和原子 factor-Kappa B ( NF-B ) p65 蛋白质表情上观察 icariin 干预效果从肺的织物的 ELISA 结果显示出的肺的 tissue.Results 那 IL-4 表情显著地被减少( P 0.05 ),当 IFN-y 表示增加了时然而并非当我们把 OVA+icariin 中等、高的剂量组与气喘作比较时,显著地组织。当染色的 T 赌注没在 OVA+icariin 高剂量组变化时,肺的织物染色的 Immunohistochemical 证明 GATA-3 显著地减少了。在肺的组织和脾淋巴细胞, T 赌注和 GATA-3 mRNA 表情显著地被减少(P 0.05 ) 在 icariin,治疗与气喘模型组相比组织。在在气喘组的老鼠怒气淋巴细胞的 GATA-3 和 T 赌注 mRNA 比在控制组高。在肺的织物的 GATA-3 mRNA 表示显著地减少了( P 0.05 )当T赌注 mRNA 表示减少了然而并非显著地,在 icariin 处理组,与气喘相比,在肺的织物的group.T赌注和 GATA-3 蛋白质表情与气喘相比显著地增加了时,组织,它意味着 icariin 能禁止 GATA-3 蛋白质,然而并非T赌注的增加。支气管,血容器和圆周当 NF-B p65 房间被减少时,肺的织物在 OVA+icariin 高剂量组有煽动性的房间的渗入,并且在这个组的 NF-B p65 的表示是不到在里面气喘组。当细胞质的 p65 蛋白质 increased.Conclusions Icariin 的表示能在气喘的老鼠调整 Th1/Th2 cytokines 的不平衡时,全部的 p65 蛋白质的表示与 icariin 处理减少了肺的织物。Icariin 能调整 Th1/Th2 的不平衡在气喘的老鼠的联系抄写因素 T 赌注和 GATA-3 肺的织物和怒气淋巴细胞。Icariin 能在气喘的老鼠禁止 NF-B p65 蛋白质的激活肺的织物。XU Chang-qing LE Jing-jing DUAN Xiao-hong DU Wei-jing LIU Bao-jun WU Jing-feng CAO Yu-xue DONG Jing-cheng 2011Chinese Medical Journal2011,,18:13
8Accuracy of ^18F-FDG PET/CT for lymph node staging in non-small-cell lung cancers显示文摘这回顾的研究评估了的背景2-( F18 )的诊断精确性在在有 non-small-cell 肺癌症( NSCLC )的病人的变形 mediastinal 和 hilar 淋巴节点的外科手术前的诊断的 -fluoro-2-deoxy-D-glucose-positron 排放断层摄影术( 18F-FDG-PET ) /COmputed 断层摄影术( PET/CT ) 39 个病人全部的 .Methods A 收到了外科手术前的 18F-FDG PET/CT 并且手术后的 biopsy.We 在 39 N 把外科手术前的 PET/CT 扫描结果与相应 intraoperative histopathalogicLIU Bao-jun DONG Jing-cheng XU Chang-qing ZUO Chuan-tao LE Jing-jing GUAN Yi-hui ZHAO Jun WU Jin-feng DUAN Xiao-hong CAO Yu-xue 2009Chinese Medical Journal2009,,15:11
9Endothelial CDS2 deficiency causes VEGFA-mediated vascular regression and tumor inhibition显示文摘The response of endothelial cells to signaling stimulation is critical for vascular morphogenesis,homeostasis and function.Vascular endothelial growth factor-a(VEGFA)has been commonly recognized as a pro-angiogenic factor in vertebrate developmental,physiological and pathological conditions for decades.Here we report a novel finding that genetic ablation of CDP-diacylglycerol synthetase-2(CDS2),a metabolic enzyme that controls phosphoinositide recycling,switches the output of VEGFA signaling from promoting angiogenesis to unexpectedly inducing vessel regression.Live imaging analysis uncovered the presence of reverse migration of the angiogenic endothelium in cds2 mutant zebrafish upon VEGFA stimulation,and endothelium regression also occurred in postnatal retina and implanted tumor models in mice.In tumor models,CDS2 deficiency enhanced the level of tumorsecreted VEGFA,which in-turn trapped tumors into a VEGFA-induced vessel regression situation,leading to suppression of tumor growth.Mechanistically,VEGFA stimulation reduced phosphatidylinositol(4,5)-bisphosphate(PIP2)availability in the absence of CDS2-controlled-phosphoinositide metabolism,subsequently causing phosphatidylinositol(3,4,5)-triphosphate(PIP3)deficiency and F0X01 activation to trigger regression of CDS2-null endothelium.Thus,our data indicate that the effect of VEGFA on vasculature is context-dependent and can be converted from angiogenesis to vascular regression.Wencao Zhao Le Cao Hanru Ying Wenjuan Zhang Dantong Li Xiaolong Ziiu Wenzhi Xue Shuang Wu Mengye Cao Cong Fu Haonan Qi Yimei Hao Yun-Chi Tang Jun Qin Tao PZhong Xiaoxi Lin Luyang Yu Xuri Li Lin Li Dianqing Wu Weijun Pan 2019Cell Research2019,29,11:9
10Friction characteristics of mechanically exfoliated and CVD-grown single-layer MoS_2显示文摘In this work, the friction characteristics of single-layer MoS_2 prepared with chemical vapor deposition(CVD) at three different temperatures were quantitatively investigated and compared to those of single-layer MoS_2 prepared using mechanical exfoliation. The surface and crystalline qualities of the MoS_2 specimens were characterized using an optical microscope, atomic force microscope(AFM), and Raman spectroscopy. The surfaces of the MoS2 specimens were generally flat and smooth. However, the Raman data showed that the crystalline qualities of CVD-grown single-layer MoS2 at 800 °C and 850 °C were relatively similar to those of mechanically exfoliated MoS2 whereas the crystalline quality of the CVD-grown single-layer MoS_2 at 900 °C was lower. The CVD-grown single-layer MoS_2 exhibited higher friction than mechanically exfoliated single-layer MoS_2, which might be related to the crystalline imperfections in the CVD-grown MoS_2. In addition, the friction of CVD-grown single-layer MoS_2 increased as the CVD growth temperature increased. In terms of tribological properties, 800 °C was the optimal temperature for the CVD process used in this work. Furthermore, it was observed that the friction at the grain boundary was significantly larger than that at the grain, potentially due to defects at the grain boundary. This result indicates that the temperature used during CVD should be optimized considering the grain size to achieve low friction characteristics. The outcomes of this work will be useful for understanding the intrinsic friction characteristics of single-layer MoS2 and elucidating the feasibility of single-layer MoS_2 as protective or lubricant layers for micro- and nano-devices.Dinh Le Cao KY Bien-Cuong TRAN KHAC Chinh Tam LE Yong Soo KIM Koo-Hyun CHUNG 2018Friction2018,6,4:9
11An expression atlas of miRNAs in Arabidopsis thaliana显示文摘MicroRNAs(miRNAs) are small non-coding RNAs that regulate a variety of biological processes. miRNA expression often exhibits spatial and temporal specificity. However, genome-wide miRNA expression patterns in different organs during development of Arabidopsis thaliana have not yet been systemically investigated. In this study, we sequenced small RNA libraries generated from 27 different organ/tissue types, which cover the entire life cycle of Arabidopsis. Analysis of the sequencing data revealed that most miRNAs are ubiquitously expressed, whereas a small set of miRNAs display highly specific expression patterns. In addition, different miRNA members within the same family have distinct spatial and temporal expression patterns. Moreover, we found that some miRNAs are produced from different arms of their hairpin precursors at different developmental stages. This work provides new insights into the regulation of miRNA biogenesis and a rich resource for future investigation of miRNA functions in Arabidopsis.Le Xu Yugang Hu Ying Cao Jingrui Li Ligeng Ma Yan Li Yijun Qi 2018Science China(Life Sciences)2018,61,2:8
12MicroRNA-125b regulates Th17/Treg cell differentiation and is associated with juvenile idiopathic arthritis显示文摘Background Juvenile idiopathic arthritis(JIA)is the most common rheumatic disease in childhood driven by aberrant pathways of T-cell activation.T helper 17(Th17)/regulatory T cell(Treg)imbalance plays critical roles in the pathogenesis of arthritis.MicroRNA-125b(miR-125b)was upregulated after the activation of the initial CD4^+T cells,and could regulate the differentiation of CD4^+T cells.However,the effects of miR-125b on Th17/Treg imbalance and differentiation of Th 17/Treg cells remain unknown.Methods In this study,we evaluated the expression of miR-125b in the peripheral blood mononuclear cells(PBMCs)of children with JIA,and the relationship of miR-125b with Th17/Treg imbalance.Then,we used lentivirus vector-mediated overexpression technology to investigate the regulatory function of miR-125b in CD4^+T cells or dendritic cell/CD4^+T co-culture system.Results Decreased miR-125b expression in PBMCs and CD4^+T cells of JIA patients was negatively correlated with the ratio of Th17/Treg cells.It also correlated negatively with retinoic acid receptor-related orphan receptorγt but positively with Forkhead box protein 3 at transcriptional levels.Furthermore,we found that miR-125b overexpression inhibited Th17 cell differentiation,whereas facilitated the differentiation of Treg cells.MiR-125b upregulation led to the decrease of Th 17-secreting cytokines but the increase of the Treg-secreting cytokines.Conclusions Our results demonstrate that miR-125b participated in regulating Thl7/Treg cell differentiation and imbalance in JIA patients.These findings provide novel insight into the critical role of miR-125b in the Th17/Treg imbalance of JIA,and raise the distinct possibility that miR-125b may prove to be a potential therapeutic target for JIA.Zhi-Dan Fan Qian Cao Na Huang Le Ma Hui-Hui Ma Ya-Yuan Zhang Hai-Guo Yu Guo-Ping Zhou 2020World Journal of Pediatrics2020,16,1:7
13Comprehensive evaluation on the ecological function of groundwater in the Shiyang River watershed显示文摘With an arid climate and shortage of water resources,the groundwater dependent ecosystems in the oasis-desert ecotone of the Shiyang River Watershed has been extremely damaged,and the water crisis in the oasis has become a major concern in the social and the scientific community.In this study,the degene-ration characteristics of the groundwater ecological function was identified and comprehensive evaluated,based on groundwater depth data,vegetation quadrat and normalized difference vegetation index(NDVI)from Landsat program.The results showed that(1)the suitable groundwater depth for sustainable ecology in the Shiyang River Watershed is about 2-4 m;(2)the terms of degenerative,qualitative and disastrous stages of the groundwater ecological function are defined with the groundwater depths of about 5 m,7 m and 10 m;(3)generally,the groundwater ecological function in the oasis-desert ecotone of the lower reaches of Shiyang River Watershed is weak with an area of 1397.9 km2 identified as the severe deterioration region,which accounted 74.7%of the total area.In the meantime,the percentages of the good,mild and moderate deterioration areas of groundwater ecological function are 3.5%,5.5%and 16.3%,respectively,which were mainly distributed in the Qingtu lake area and the southeastern area of the Shoucheng town;(4)the degradation and shrinkage of natural oasis could be attributed to the dramatic groundwater decline,which is generally caused by irrational use of water and soil resources.This study could provide theoretical basis and scientific support for the decision-making in environmental management and ecological restoration of the Shiyang River Watershed.Min Liu Zhen-long Nie Le Cao Li-fang Wang Hui-xiong Lu Zhe Wang Pu-cheng Zhu 2021Journal of Groundwater Science and Engineering2021,9,4:5
14DTI and pathological changes in a rabbit model of radiation injury to the spinal cord after ^(125)I radioactive seed implantation显示文摘Excessive radiation exposure may lead to edema of the spinal cord and deterioration of the nervous system. Magnetic resonance imaging can be used to judge and assess the extent of edema and to evaluate pathological changes and thus may be used for the evaluation of spinal cord injuries caused by radiation therapy. Radioactive ^(125)I seeds to irradiate 90% of the spinal cord tissue at doses of 40–100 Gy(D90) were implanted in rabbits at T_(10) to induce radiation injury, and we evaluated their safety for use in the spinal cord. Diffusion tensor imaging showed that with increased D90, the apparent diffusion coefficient and fractional anisotropy values were increased. Moreover, pathological damage of neurons and microvessels in the gray matter and white matter was aggravated. At 2 months after implantation, obvious pathological injury was visible in the spinal cords of each group. Magnetic resonance diffusion tensor imaging revealed the radiation injury to the spinal cord, and we quantified the degree of spinal cord injury through apparent diffusion coefficient and fractional anisotropy.Xia Cao Le Fang Chuan-yu Cui Shi Gao Tian-wei Wang 2018Neural Regeneration Research2018,13,3:4
15Experimental investigations of graded sediment transport under unsteady flow hydrographs显示文摘自然河的隧道能在不稳定的流动条件下面处于沉积运输率经历重要变化,特别在洪水自记水位计事件期间。目前然而,处于分级的沉积运输率有在不稳定的自记水位计流动性质和时间的可变性之间的相互作用的理解的不同缺乏。在当前的学习,一系列参量的实验被进行调查二等级的沉积床的反应到不同不稳定的自记水位计流动条件的一个范围。全部、部分的水流带来的碎石沉积运输率的调查在自记水位计上在运输揭示了强壮的时间的变化,与尺寸依赖者时间落后在山峰流动条件和山峰水流带来的碎石之间观察的效果搬运率。明确地,粗糙的石子在自记水位计的升起的手足期间增加了活动性,也达到他们的山峰水流带来的碎石运输率在以前,或接近山峰流动条件。由对比,更好的等级趋于在自记水位计的后退的手足期间提高了活动性,与在山峰流动条件过去了以后,测量的山峰运输率。测量从的谷物尺寸分布收集了样品也显示了材料在后退的手足期间在升起的手足和 fining 上变粗的水流带来的碎石,当床的相应图象分析大小出现时,作文在自记水位计上显示出仅仅边缘的变化。全部、部分的沉积收益的计算表明测试的 bimodal 沉积混合在测试的所有自记水位计条件上比单峰的混合以显著地更高的率被搬运。这发现显示单峰的沉积床由于中型的石子在单峰的沉积等级介绍的增加的许多内在地是比 bimodal 床更稳定的。在学习建立的参量的依赖在洪水流动自记水位计下面在自然河的隧道以内在分级的沉积运输过程上的床表面和他们的影响为部分内部小粒的效果的改进理解有清楚的含意。Le Wang Alan J.S. Cuthbertson Gareth Pender Zhixian Cao 2015International Journal of Sediment Research2015,30,4:4
16Comparison of yield performance between direct-seeded and transplanted double-season rice using ultrashort-duration varieties in central China显示文摘Labor scarcity requires double-season rice to be planted by direct seeding as an alternative to transplanting. Only ultrashort-duration varieties can be used in direct-seeded, double-season rice(DSD) in central China where thermal time is limited. Whether ultrashort-duration varieties grown in DSD can be as productive and efficient in nitrogen(N) use as transplanted double-season rice(TPD) remains unclear. Field experiments were conducted in Hubei province, central China with two establishment methods(DSD,TPD) and three N rates in the early and late seasons of 2017 and 2018. Nitrogen treatments included zero-N control(N0), total N rate of 60 kg N ha;with equal splits at basal, midtillering, and panicle initiation(N1), and weekly N application at 15 kg ha;from seeding/transplanting to heading(N2). Both early-and late-season rice under DSD matured within 95 days, on average 9 days shorter than rice under TPD. The grain yield of DSD was comparable to or higher than that of TDP in both seasons, although the daily yield was significantly higher under DSD than under TDP. Before heading, DSD had higher leaf area,stem number, intercepted radiation, and radiation use efficiency than TPD, which compensated for the negative effect of short growth duration on biomass production. Total dry weight and harvest index under DSD were comparable to or higher than those under TDP. In general, the recovery efficiency of fertilizer-N under DSD was higher than that under TPD, but the reverse was true for physiological N use efficiency. Thus, there was no significant difference in agronomic N use efficiency between DSD and TPD. These results suggested that DSD with ultrashort-duration varieties is a promising alternative to TPD in central China for maintaining high grain yield and N fertilizer use efficiency with less labor input.Le Xu Shen Yuan Xinyu Wang Zhifeng Chen Xiaoxiao Li Jing Cao Fei Wang Jianliang Huang Shaobing Peng 2022The Crop Journal2022,10,2:4
17An Advanced Spectrum Allocation Algorithm for The Across-Cell D2D Communication in LTE Network with Higher Throughput显示文摘In the hybrid LTE cellular network with D2D(Device-to-Device) communication, D2D communication technologies can improve the spectral efficiency significantly. However, the D2D users have to reutilize the spectrum which is allocated to the cellular users. Therefore, the co-channel interference will be more complicated in the case of crosscell D2D communications. In this article, a novel spectrum allocation algorithm for inter-cell D2D communication considering the traffic load is proposed. The traffic load can be balanced by the proposed algorithm. Meanwhile D2D users can multiplex the spectrum allocated to a number of cellular users with a certain percentage to meet the requirements of Qo S of D2D communications and reduce the interference to cellular users. Finally, the simulation results demonstrate that the proposed algorithm can meet the needs of D2D users, balance the traffic load and improve the overall throughput of the system.LI Yun ZHANG Le TAN Xin CAO Bin 2016China Communications2016,13,4:3
18Effect of PI3K-mediated autophagy in human osteosarcoma MG63 cells on sensitivity to the chemotherapy drug cisplatin显示文摘Objective: To investigate the influence of autophagy on sensitivity to the chemotherapy drug cisplatin(DDP) and the role of PI3 K in autophagy. Methods: MTT methods and l ow cytometer, with rapamycin up-regulating the autophagy and 3-MA down-regulating the autophagy, were employed to measure the proliferation inhibition rate on DDP-treated osteosarcoma cells and the change in cell cycle. The expression of intracellular protein was detected by Western blot. The autophagy of MG63 cell was observed using l uorescence microscope and transmission electron microscope. Results: Western blot showed that basic autophagy level of MG63 cell was significantly lower than that of h FOB cell. MTT test revealed that the cell proliferation inhibition rate in the group treated with rapamycin and DDP, group treated with 3-MA and DDP, and group only treated with DDP was signii cantly dif erent. It was demonstrated by the l ow cytometry that in group treated with DDP, inhibition on autophagy can increase the cell numbers in G1 phase and reduce the cell numbers in S phase of cell cycle. Increase of autophagosome in MG63 cytoplasm was observed under l uorescence microscope. Conclusions: Up-regulating the autophagy signii cantly reduced the sensitivity of MG63 cell to chemotherapy with DDP. DDP induced autophagy of MG63 cell and blocked the cell cycle at G1 phase.Xu-Dong Miao Le Cao Qiang Zhang Xiao-Ying Hu Yi Zhang 2015Asian Pacific Journal of Tropical Medicine2015,8,9:3
19Improved Ag-Si interface performance for Si solar cells using a novel Te-based glass and recrystallization process of Ag显示文摘In order to prove that the Te-based glass frit could be applied to Ag pastes to fabricate Ag electrode and elucidate the reactions among Ag,the frit,and the Si wafer,the Te-based glass and Ag pastes with different contents of glass frit(0 wt%,1 wt%,3 wt%,5 wt%,and 7 wt%)were prepared.The microstructures of Ag electrodes and the phase analysis of interface between Ag electrodes and the Si wafer were investigated using scanning electron microscopy(SEM)coupled with energy-dispersive X-ray spectroscopy(EDX)and X-ray diffraction(XRD).When the content of glass frit is 3 wt%,the Ag electrode has good adhesion with Si wafer.What’s more,Ag crystallites and metallic Te could be found on the Si wafer.These results suggest that the TeO_(2) in the glass frit could react with SiNx anti-reflecting coating(ARC)and Si to serve as a medium for forming Ag crystallites.Xin-Xin Pi Xiu-Hua Cao Ji-Shi Chen Le Zhang Zhen-Xiao Fu Li-Xi Wang Qi-Tu Zhang 2021Rare Metals2021,40,1:3
20Rolling Contact Fatigue Properties of SAE 8620 Steel after Case Carburizing显示文摘Rolling contact fatigue(RCF)properties of SAE 8620 steel after case carburizing have been investigated under two contact stresses of 4.0and 5.5GPa.Results show that the RCF life ranges from 2.5×106 to 3×107 cycles under the contact stress of 5.5GPa,while it can be more than 1×108 cycles under the contact stress of 4.0GPa.The rated fatigue life L10(lives with the 10%failure)is also drastically shortened from 9.8×106 to 5.4×105 cycles when the contact stress is increased from 4.0to 5.5GPa.Theoretical calculations and fractographs show that the maximum shear stress and the contact area increase with increasing the contact stress,making RCF tend to occur earlier.Yan-guang CAO Le XU Gou-qiang ZHANG Jie SHI Mao-qiu WANG 2016Journal of Iron and Steel Research(International)2016,23,7:3
返回顶部 每页显示:
共7页 首页 上一页 第1页 下一页 末页 /7 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费