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32篇 您的检索式:作者名="Jing Zhifeng"
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1Effects of different fertilizations on fruit quality,yield and soil fertility in field-grown kiwifruit orchard显示文摘Kiwifruit yield and quality and soil nutrients were investigated in a kiwifruit orchard after long-term fertilization to understand the relationship between kiwifruit growth and soil nutrition.Seven fertilization treatments with three replications were applied in a continuous four-year period,including no fertilizer(CK);phosphorus(P)and potassium(K)fertilizers(PK);N and K fertilizers(NK);N and P fertilizers(NP);N,P and K fertilizers(NPK);1.5 times of N,P and K fertilizers(1.5NPK);and chemical fertilizers plus swine manure(NPKM).Fertilization increased kiwifruit yield at the rate of 450 kg N/hm^(2),225 kg P2O5/hm^(2),300 kg K2O/hm^(2).The average yield decreased in a descending order for NPKM(44.6 t/hm^(2)),1.5NPK(42.6 t/hm^(2)),NPK(42.0 t/hm^(2)),NK(38.0 t/hm^(2)),NP(36.7 t/hm^(2)),PK(36.4 t/hm^(2))and CK(34.1 t/hm^(2)).The sugar to acid ratio(S:A)was the highest(10.9)in 2012,and the soluble sugar increased by 15.7%after four-year NPKM fertilization.The NPKM fertilization also significantly increased the vitamin C,soluble solid and firmness.The soil organic carbon contents at 0-20 cm,20-40 cm and 40-60 cm in depth under the NPKM treatment were 27%,29%and 139%higher than that of the CK treatment,respectively.The available N contents at 0-20 cm,20-40 cm and 40-60 cm in depth in the 1.5NPK treatment were 180%,114%and 133%higher than that in the CK treatment,respectively.Balanced fertilization with N,P,K and organic manure is important to soil fertility,which may increase yield and improve quality in field-grown kiwifruit orchard.Zhao Zuoping Duan Min Yan Sha Liu Zhifeng Wang Qi Fu Jing Tong Yan’an 2017International Journal of Agricultural and Biological Engineering2017,10,2:6
2Adaptive sliding mode backstepping control for near space vehicles considering engine faults显示文摘A fault tolerant control methodology based adaptive sliding mode(ASM) backstepping is proposed for near space vehicle(NSV) attitude control system under engine faults. The proposed scheme combined adaptive backstepping with the sliding mode control strategy could guarantee the system's stability and track desired signals under external disturbances and engine faults. Firstly, attitude mode description and the engine faulty model are given. Secondly, a nominal control law is designed.Thirdly, a sliding mode observer is given later in order to estimate both the information of engine faults and external disturbances. An adaptive sliding mode technology based on the previous nominal control law is developed via updating faulty parameters. Finally,analyze the system's fault-tolerant performance and reliability through experiment simulation, which verifies the proposed design of fault-tolerant control can tolerate engine faults, as well as the strong robustness for external disturbance.ZHAO Jing JIANG Bin XIE Fei GAO Zhifeng XU Yufei 2018Journal of Systems Engineering and Electronics2018,29,2:5
3Comparison 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
4Photocatalytic decompositions of gaseous HCHO and methylene blue with highly ordered TiO_2 nanotube arrays显示文摘The highly ordered Ti O_2nanotubes(NTs) were fabricated by the anodic oxidation method.Their morphology,structure and crystalline phase were characterized by scanning electron microscopy(SEM) and X-ray diffractometer(XRD).The effects of morphology,specific surface area,pore structures and photocatalytic activity of the Ti O_2 NTs were investigated.UV–vis spectra analysis showed that its light absorption had been extended to the visible light range.The photocatalytic activity of the as-prepared samples was evaluated by photocatalytic oxidation of gaseous HCHO and MB aqueous solution.The samples had better adhesion strength in the dark and showed a higher photocatalytic activity than nanoparticles.Especially,with ultraviolet light pretreatment,the nanotubes exhibited more stable active for photocatalytic decomposition and the photodecomposition rate remained at high level after 3 cycles of the photocatalysis experiment.Thus,how the number of surface active group ·OH increased and the mechanism for the great improvement for the photocatalytic activity are discussed.Lixia Li Jing Ya Fengjiao Hu Zhifeng Liu Lei E 2016Journal of Energy Chemistry2016,25,4:2
5Can Fluorine-18 Fluoroestradiol Positron Emission Tomography–Computed Tomography Demonstrate the Heterogeneity of Breast Cancer In Vivo?显示文摘Zhongyi Yang Yifei Sun Yongping Zhang Jing Xue Mingwei Wang Wei Shi Beiling Zhu Silong Hu Zhifeng Yao Herong Pan Yingjian Zhang 2013Clinical Breast Cancer2013,,:2
6Structure Analysis of the Complete Mitochondrial Genome in Cultivation Variety ‘Rongfu’显示文摘In this report,complete mitochondrial genome sequences of Laminaria cultivation variety 'Rongfu' were obtained.The results showed the length of circular molecule of mtDNA was 37 638 bp(64.7% A+T),encoding three rRNAs(23S,16S and 5S),25 tRNAs,35 known mitochondrial proteins and 3 ORFs.Sequence alignment indicated its mtDNA genome was very similar to that of Laminaria japonica.Phylogenetic trees inferred from concatenated 30 mitochondrial genes showed that 'Rongfu',Laminaria japon-ica,Laminaria longipedalis,Laminaria diabolica,Laminaria religiosa and Laminaria ochotensis clustered together.In addition,compared with mitochondrial genome of L.japonica,'Rongfu' mtDNA lacked a non-coding region of 19 nucleotides,which was located between rRNA small subunit gene 3(rps3)and rRNA small subunit gene 9(rps9).Seven cultivation varieties of China were divided into two groups based on this non-coding region which was absent in 'Rongfu','Fujian' and 'Sanhai' while present in 'Ailunwan','Dongfang No.2','Dongfang No.3' and 'Zaohoucheng'.So this variation can be used in germplasm identification of cultivation variety.ZHANG Jing LI Ning ZHANG Zhifeng LIU Tao 2011Journal of Ocean University of China2011,10,4:2
7Significant elevation of B cells at the acute stage in enterovirus 71-infected children with central nervous system involvement显示文摘Jing Xie Yang Jiao Zhifeng Qiu Qihan Li Taisheng Li 2010Scandinavian Journal of Infectious Diseases2010,,11:1
8π-π inter- action of aromatic groups in amphiphilic molecules directing for single-crystalline mesostructured zeolite nanosheets 显示文摘Xu Dongdong Ma Yarauang Jing Zhifeng 2014Nat Commun2014,5,:1
9Imbalance between nitrogen and potassium fertilization influences potassium deficiency symptoms in winter oilseed rape (Brassica napus L.) leaves显示文摘Chlorosis at leaf margins is a typical symptom of potassium(K) deficiency, but inappropriate application of K with other nutrients often masks symptoms of K deficiency. A two-year field experiment was conducted to measure the interactive effects of N and K on leaf photosynthesis and dry matter accumulation and the resulting growth dilution effect on K concentration and leaf K deficiency symptoms. N application aggravated the imbalance of N and K nutrients and further exacerbated K deficiency symptoms under K limitation. Synergistic effects of N and K promoted plant growth, amplified the growth dilution effect, and reduced the critical K concentration in leaves. Using 90% of the maximum shoot biomass as a threshold,the critical K concentration was 0.72% at the recommended N(N180) fertilization level. The critical K concentration increased by 62.5% owing to the reduced biomass under insufficient N(N;) supply. In contrast, high N(N;) reduced the critical K concentration(0.64%), accelerating chlorophyll decomposition and exacerbating K deficiency symptoms. The basis of changing the critical K concentration by magnifying growth dilution effect was the functional synergistic effect of N and K on photosynthetic characteristics. Under insufficient N, the low maximum carboxylation rate(V;) limited the net photosynthetic rate(An) and necessitated more K to maintain high CO;transmission capacity, to improve the total conductance g;/V;ratio. High N supply increased gtotand V;possibly mitigating the effect of K reduction on photosynthesis. In conclusion, it is unwise to judge K status of plants only by K concentration without accounting for crop mass(or dilution effect), critical K concentration and deficiency symptoms are affected by N fertilization, and the synergistic effect of N and K on leaf photosynthesis is the foundation of maximal growth of plants under diverse critical K concentrations.Jing Li Wenshi Hu Zhifeng Lu Fanjin Meng Rihuan Cong Xiaokun Li Tao Ren Jianwei Lu 2022The Crop Journal2022,10,2:1
10An invasive zone in human liver cancer identified by Stereo-seq promotes hepatocyte–tumor cell crosstalk,local immunosuppression and tumor progression显示文摘Dissecting and understanding the cancer ecosystem,especially that around the tumor margins,which have strong implications for tumor cell infiltration and invasion,are essential for exploring the mechanisms of tumor metastasis and developing effective new treatments.Using a novel tumor border scanning and digitization model enabled by nanoscale resolution-SpaTial Enhanced REsolution Omics-sequencing(Stereo-seq),we identified a 500µm-wide zone centered around the tumor border in patients with liver cancer,referred to as“the invasive zone”.We detected strong immunosuppression,metabolic reprogramming,and severely damaged hepatocytes in this zone.We also identified a subpopulation of damaged hepatocytes with increased expression of serum amyloid A1 and A2(referred to collectively as SAAs)located close to the border on the paratumor side.Overexpression of CXCL6 in adjacent malignant cells could induce activation of the JAK-STAT3 pathway in nearby hepatocytes,which subsequently caused SAAs’overexpression in these hepatocytes.Furthermore,overexpression and secretion of SAAs by hepatocytes in the invasive zone could lead to the recruitment of macrophages and M2 polarization,further promoting local immunosuppression,potentially resulting in tumor progression.Clinical association analysis in additional five independent cohorts of patients with primary and secondary liver cancer(n=423)showed that patients with overexpression of SAAs in the invasive zone had a worse prognosis.Further in vivo experiments using mouse liver tumor models in situ confirmed that the knockdown of genes encoding SAAs in hepatocytes decreased macrophage accumulation around the tumor border and delayed tumor growth.The identification and characterization of a novel invasive zone in human cancer patients not only add an important layer of understanding regarding the mechanisms of tumor invasion and metastasis,but may also pave the way for developing novel therapeutic strategies for advanced liver cancer and other solid tumors.Liang Wu Jiayan Yan Yinqi Bai Feiyu Chen Xuanxuan Zou Jiangshan Xu Ao Huang Liangzhen Hou Yu Zhong Zehua Jing Qichao Yu Xiaorui Zhou Zhifeng Jiang Chunqing Wang Mengnan Cheng Yuan Ji Yingyong Hou Rongkui Luo Qinqin Li Liang Wu Jianwen Cheng Pengxiang Wang Dezhen Guo Waidong Huang Junjie Lei Shang Liu Yizhen Yan Yiling Chen Sha Liao Yuxiang Li Haixiang Sun Na Yao Xiangyu Zhang Shiyu Zhang Xi Chen Yang Yu Yao Li Fengming Liu Zheng Wang Shaolai Zhou Huanming Yang Shuang Yang Xun Xu Longqi Liu Qiang Gao Zhaoyou Tang Xiangdong Wang Jian Wang Jia Fan Shiping Liu Xinrong Yang Ao Chen Jian Zhou 2023Cell Research2023,33,8:1
11π-πinteraction of aromatic groups in amphiphilic molecules directing for singlecrystalline mesostructured zeolite nanosheets显示文摘Dongdong Xu Yanhang Ma Zhifeng Jing 2014Nature Communications2014,,5:1
12The urban growth, size distribution and spatio-temporal dynamic pattern of the Yangtze River Delta megalopolitan region, China显示文摘Guangjin Tian Jing Jiang Zhifeng Yang Yaoqi Zhang 2010Ecological Modelling2010,,3:1
13Surfactants with aromatic-group tail and single quaternary ammonium head for directing single-crystalline mesostructured zeolite nanosheets 显示文摘Xu Dongdong Jing Zhifeng Cao Fenglei 2014Chem Mater2014,26,15:1
14Time-resolved chemiluminescence strategy for multiplexed immunoassay of clenbuterol and ractopamine显示文摘Jing Han Hongfei Gao Wenwen Wang Zhenxing Wang Zhifeng Fu 2013Biosensors and Bioelectronics2013,,:1
15Controlled synthesis of ZnO and TiO 2 nanotubes by chemical method and their application in dye-sensitized solar cells显示文摘Zhifeng Liu Chengcheng Liu Jing Ya E. Lei 2010Renewable Energy2010,,4:1
16Mechanism and characteristics of porous ZnO films by sol-gel method with PEG template 显示文摘Zhifeng Liu Junwei Li Jing Ya 2008Materials Letters2008,62,89:1
17π-πinteraction of aromatic groups in amphiphilic molecules directing for singlecrystalline mesostructured zeolite nanosheets显示文摘Dongdong Xu Yanhang Ma Zhifeng Jing 2014Nature Communications2014,5,45:1
18Can Fluorine-18 Fluoroestradiol Positron Emission Tomography–Computed Tomography Demonstrate the Heterogeneity of Breast Cancer In Vivo?显示文摘Zhongyi Yang Yifei Sun Yongping Zhang Jing Xue Mingwei Wang Wei Shi Beiling Zhu Silong Hu Zhifeng Yao Herong Pan Yingjian Zhang 2013Clinical Breast Cancer2013,,:1
19ZnO/CuInS 2 core/shell heterojunction nanoarray for photoelectrochemical water splitting显示文摘Yabin Li Zhifeng Liu Yun Wang Zhichao Liu Jianhua Han Jing Ya 2012International Journal of Hydrogen Energy2012,,20:1
20Toxicity of oxide nanoparticles to the green algae Chlorella sp.显示文摘Jing Ji Zhifeng Long Daohui Lin 2010Chemical Engineering Journal2010,,2:1
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