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| 1 | Optimal guidance of extended trajectory shaping显示文摘To control missile's miss distance as well as terminal impact angle, by involving the timeto-go-nth power in the cost function, an extended optimal guidance law against a constant maneuvering target or a stationary target is proposed using the linear quadratic optimal control theory.An extended trajectory shaping guidance(ETSG) law is then proposed under the assumption that the missile-target relative velocity is constant and the line of sight angle is small. For a lag-free ETSG system, closed-form solutions for the missile's acceleration command are derived by the method of Schwartz inequality and linear simulations are performed to verify the closed-form results. Normalized adjoint systems for miss distance and terminal impact angle error are presented independently for stationary targets and constant maneuvering targets, respectively. Detailed discussions about the terminal misses and impact angle errors induced by terminal impact angle constraint, initial heading error, seeker zero position errors and target maneuvering, are performed. | Wang Hui Lin Defu Cheng Zhenxuan Wang Jiang | 2014 | Chinese Journal of Aeronautics2014，27，5： | 11 |
| 2 | cDNA cloning and expression pattern of two enolase genes from the Chinese oak silkworm, Antheraea pernyi显示文摘在这研究,二 enolase 基因从中国橡树蚕被孤立并且描绘, Antheraea perny,它被指定为 enolase 我和 II 分别地。enolase 我 cDNA 顺序是有编码 433 氨基酸的 1302 bp 的一个开的读物框架(ORF ) 的 1712 bp。enolase II cDNA 顺序是有编码 431 氨基酸的 1296 bp 的 ORF 的 1549 bp。二基因的氨基酸序列分享 enolase 的几个保存特征 / 地点。我显示出的 Antheraea pernyi enolase 93%97% 顺序身份到迄今为止可得到的 lepidopterans 的 enolases,到另外的无脊椎动物的 enolases 的 75%82% 身份,到包括脊椎动物的另外的有机体的 enolases 的 60%72% 身份,植物,和真菌。Antheraea pernyi enolase II 显示出 84% 身份到 Bombyx mori enolase II,而是 60% 身份到 A。pernyi enolase 我。在种系发生的树上, enolase II 从 A 定序。pernyi 和 B。mori 清楚地包括 A 与更高的有机体的 enolase 序列的多数被分开。pernyi 和 B。我定序的 mori enolase。由顺序比较和种系发生的分析,我们从 A 建议那 enolase II。pernyi 和 B。mori 可以是 enolase 总科的一个新成员。Antheraea pernyi enolase 我而 enolase II mRNA 在睾丸和卵巢明确地被表示, mRNA 在所有测试纸巾被发现,建议 enolase II 基因的产品可能与复制有关。抄本许多 A。pernyi enolase 我基因在冷吃惊以后并且显著地是显著地下面调整的在热吃惊以后起来调整,建议那 A。pernyi enolase 我基因可能由温度应力是可诱导的。 | Yanqun Liu Yuping Li Huan Wang Runxi Xia Xisheng Li Haolei Wan Li Qin Defu Jiang Cheng Lu Zhonghuai Xiang | 2010 | Acta Biochimica et Biophysica Sinica2010，42，11： | 2 |
| 3 | Co-frequency Interference Suppression for Aerostat Passive Bistatic Radar显示文摘Co-frequency interference is frequently encountered in the aerostat passive bistatic radar exploiting frequency modulated broadcasting signals. Independent component analysis(ICA) in frequency domain, one of the classic Blind source separation(BSS) algorithms, is utilized to recover the direct signal in the above scenarios.To solve the permutation problem of the frequency domain BSS, we use the method of correlation in time-frequency domain between the output of ICA and the coarse reference signal achieved by pattern synthesis with nulls in the direction of the interference or reference stations. In order to suppress the interferences and clutters, the separated direct signals of the reference and interference broadcasting signals are fed into a type of two dimensional adaptive filters in space and fast temporal domain. The processing scheme shows good performance in target detection, which is validated by computer simulation. | WANG Feng WEI Shuang JIANG Defu | 2018 | Chinese Journal of Electronics2018，27，3： | 2 |
| 4 | Experimental and numerical studies of impact on filament-wound composite cylinder显示文摘This study focused on the impact behavior of carbon-fiber-wrapped composite cylinders subjected to impact from flat-ended,hemispherical-nosed and conical-nosed impactors.Damage morphologies of the cylinders and mechanisms of the damage were analyzed.Change laws of the maximum impact forces,durations of impact processes and energies absorbed by the cylinders after impact with different impactors and impact energies were obtained.A finite element model was developed and the simulation results were in reasonable agreement with the tests.Finally,taking the flat-ended impactor as an example,stress distributions of the cylinders under pressurization and impact were discussed. | Qiaoguo Wu Xuedong Chen Zhichao Fan Yong Jiang Defu Nie | 2017 | Acta Mechanica Solida Sinica2017，30，5： | 2 |
| 5 | Experimental study on baling rice straw silage显示文摘For resolving harvesting technology of fresh rice straw silage and plugging of the round steel-roll baler in China,experimental researches were carried out.For harvesting technology,baling silage and chopping silage were experimented.For the round baler,three kinds of feeding rolls equipped for enhancing feeding capability were experimented separately by reliability.Experimental results indicate:harvesting technology of baling fresh rice straw as silage is practicable;slicing-disc feeding rolls can be used to the baler to resolve plugging in straw-baling course.And through further experiments by reliability and density,optimal structure of the feeding roll is obtained:big and small slicing-discs arranged in interval and inclination,distance between slicing-discs being 30-40 mm. | Wang Defu Dennis R.Buckmaster Jiang Yiyuan Hua Jinling | 2011 | International Journal of Agricultural and Biological Engineering2011，4，1： | 2 |
| 6 | Fractionally Nyquist Sample Spaced ARMA Blind Equalizer for Direct Signal Recovery in Passive Bistatic Radar显示文摘This paper proposes a modified signal processing structure based on the fractionally Nyquist sample spaced structure for passive bistatic radar.To recover the direct signal from the multipath clutter,an equalizer of the Auto regressive moving average(ARMA)type is proposed based on the fractionally Nyquist sample spaced constant modulus algorithm.Compared with the conventional Nyquist sample spaced equalizer,the equalizer of the fractionally Nyquist sample spaced ARMA structure is more effective in dealing with deep fading multipath channels with zeros near the unit circle.Computer simulations and real data tests indicate that the proposed approach outperforms the conventional processing structure in terms of both clutter residual and mean square error. | WANG Feng SHEN Wei JIANG Defu WEI Shuang | 2017 | Chinese Journal of Electronics2017，26，3： | 1 |
| 7 | A Comparison Study of Credit Scoring Models显示文摘 | Defu Zhang Hongyi Huang Qingshan Chen Yi Jiang | 2007 | Third International Conference on Natural Computation2007，，1： | 1 |
| 8 | Metagenomics reveals contrasting energy utilization efficiencies of captive and wild camels(Camelus ferus)显示文摘Captive conditions can affect the symbiotic microbiome of animals.In this study,we compared the structural and functional differences of the gastrointestinal microbiomes of wild Bactrian camels(Camelus ferus)between wild and captive populations,as well as their different host energy utilization performances through metagenomics.The results showed that wild-living camels harbored more microbial taxa related to the production of volatile fatty acids,fewer methanogens,and fewer genes encoding enzymes involved in methanogenesis,leading to higher energy utilization efficiency compared to that of captive-living camels.These findings suggest that the wild-living camel fecal microbiome demonstrates a series of adaptive characteristics that enable the host to adjust to a relatively barren field environment.Our study provides novel insights into the mechanisms of wildlife adaptations to habitats from the perspective of the microbiome. | Liping YAN Liping TANG Zhichao ZHOU Wei LU Bo WANG Zhicheng SUN Xue JIANG Defu HU Junqing LI Dong ZHANG | 2022 | Integrative Zoology2022，17，3： | 0 |
| 9 | Sedimentary Records and Environmental Analysis of the Ximencuo Lake in Northeast Qinghai-Tibet Plateau in the Past 1,700 Years显示文摘Lake sediment is the recorder of historical climate fluctuation and basin environment change. This study collected the Ximencuo Lake sediment in source area of the Yellow River, analyzed organic matters and geochemical elements of the core, obtained nearly environment changes of the past 1,720 years. The results showed the environment evolution process of the 47-cm columnar core can be divided into four stages: below 32 cm(before 900 A.D.), corresponding to the cool and wet climate; 32–20 cm(900 A.D–1300 A.D.), corresponding to the warming temperature and decreasing precipitation; between 20–3.5 cm(1300–1900 A.D.), the stage is more consistent with the Little Ice Age, and precipitation gradually reduced; 3.5–0 cm(since 1900 A.D.), this is the twentieth Century warming period with increasing temperature and reduced precipitation. Phosphorus content increased rapidly in the last 20 years, reflecting the continuously increasing human interventions, but before this period, the P content was low and stable, indicating the natural background of regional phosphorus content. | SHEN Defu LI Shijie JIANG Yongjian | 2016 | Journal of Landscape Research2016，8，1： | 0 |
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