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Search Results: 1 - 10 of 31666 matches for " Yin-Fang Tu "
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Mao Yin-fang,

电子与信息学报 , 1983,
Abstract: In this paper the effects of Doppler shift error on the imaging of synthetic aperture radar are analysed. The calculating formulae, the experimental methods, the experimetal results, and the error analysis of optical compensation to eliminate the effects are given.
Feedback control of a kind of non-linear chaotic finance system

SONG Yin-fang,

重庆邮电大学学报(自然科学版) , 2006,
Abstract: 对于一类混沌金融系统,设计了3种不同的线性反馈控制,根据小增益定理,得到了系统状态反馈系数的取值范围,使得系统在该反馈控制下全局渐近稳定,从而保证混沌消失,这样有效地控制了系统,为政府及时采取适当可行的经济政策和调整力度提供了理论依据
Prevalence and clinical characteristics of carotid atherosclerosis in newly diagnosed patients with ketosis-onset diabetes: a cross-sectional study
Lian-Xi Li, Cui-Chun Zhao, Ying Ren, Yin-Fang Tu, Jun-Xi Lu, Xing Wu, Wei-Xing Zhang, Jia-An Zhu, Mei-Fang Li, Li-Bo Yu, Yu-Qian Bao, Wei-Ping Jia
Cardiovascular Diabetology , 2013, DOI: 10.1186/1475-2840-12-18
Abstract: In total, 423 newly diagnosed Chinese patients with diabetes including 208 ketosis-onset diabetics without islet-associated autoantibodies, 215 non-ketotic type 2 diabetics and 79 control subjects without diabetes were studied. Carotid atherosclerosis was defined as the presence of atherosclerotic plaques in any of the carotid vessel segments. Carotid intima-media thickness (CIMT), carotid atherosclerotic plaque formation and stenosis were assessed and compared among the three groups based on Doppler ultrasound examination. The clinical features of carotid atherosclerotic lesions were analysed, and the risk factors associated with carotid atherosclerosis were evaluated using binary logistic regression in patients with diabetes.The prevalence of carotid atherosclerosis was significantly higher in the ketosis-onset diabetic group (30.80%) than in the control group (15.2%, p=0.020) after adjusting for age- and sex-related differences, but no significant difference was observed in comparison to the non-ketotic diabetic group (35.8%, p=0.487). The mean CIMT of the ketosis-onset diabetics (0.70±0.20 mm) was markedly higher than that of the control subjects (0.57±0.08 mm, p<0.001), but no significant difference was found compared with the non-ketotic type 2 diabetics (0.73±0.19 mm, p=0.582) after controlling for differences in age and sex. In both the ketosis-onset and the non-ketotic diabetes, the prevalence of carotid atherosclerosis was markedly increased with age (both p<0.001) after controlling for sex, but no sex difference was observed (p=0.479 and p=0.707, respectively) after controlling for age. In the ketosis-onset diabetics, the presence of carotid atherosclerosis was significantly associated with age, hypertension, low-density lipoprotein cholesterol and mean CIMT.The prevalence and risk of carotid atherosclerosis were significantly higher in the ketosis-onset diabetics than in the control subjects but similar to that in the non-ketotic type 2 diabetics. The ch

SHEN Qi-han,ZHANG Yin-fang,

地球学报 , 1990,
Abstract: <正> 内蒙古中南部系指西起包头以西的哈达门沟,东至兴和县(南北一线)呈东西向展布的长条形地区。该区早前寒武纪地层十分发育,由老至新见有太古宙的集宁群,乌拉山群和下元古代的二道凹群(修正后的新二道凹群)以及下中元古代的马家店群。这些岩群的原岩类型、形成环境、变质作用以及岩浆作用等,都有不同的特点。它们无论从空间分布上,还是时间演化上,都具有明显的规律性,这与各岩群生成前后的地质和大地构造背景有密切关系。
Speeding Scalar Multiplication of Elliptic Curve over GF(2^mn)
Ding Yong,Yin-Fang Hong,Wei-Tao Wang,Yuan-Yuan Zhou
International Journal of Network Security , 2010,
Abstract: Lee et al. proposed two methods to speed up the computation of scalar multiplication of elliptic curve defined over GF(2^{mn}) with a medium size of m in the range 10 leq m leq 20. In these methods, Frobenius map is utilized to expand the integer k and each coefficient of the expansion is represented as a binary string. In this paper, with the application of joint sparse form (JSF) to the coefficients, some variations of Lee et al.'s methods are proposed to achieve a better performance at a lower storage requirement.
Ultrasensitive Detection of Infrared Photon Using Microcantilever: Theoretical Analysis

CAO Li-Xin,ZHANG Feng-Xin,ZHU Yin-Fang,YANG Jin-Ling,

中国物理快报 , 2010,
Effects of random external fields on the dynamics of the one-dimensional Blume-Capel model

Li Yin-Fang,Shen Yin-Yang,Kong Xiang-Mu,

物理学报 , 2012,
Abstract: The dynamical properties of quantum spin systems have received a great deal of theoretical and experimental attention in the past decades. Only recently, has much attention been paid to the random quantum spin systems. In this paper the effect of random external field on the dynamics of one-dimensional Blume-Capel model with s = 1 in the high-temperature limit is investigated by using the recurrence relations method. The spin autocorrelation function as well as the corresponding spectral density of the system is calculated in the presence of the field that satisfies two types of distributions. When the single-ion anisotropy takes 0, for the bimodal distribution, the dynamics of the system behaves as a crossover from a central peak behavior to a collective mode one. For the Gaussian distribution, when the standard deviation is small, the dynamical behavior of the system also exhibits a crossover; when the standard deviation is large enough, the system only shows a disordered behavior. We also discuss the effect of the single-ion anisotropy on the dynamical property of the system, and find that the collective-mode behavior becomes weaker as the single-ion anisotropy exists.
Effects of Three Submerged Macrophytes on the Growth of Bloom Algae in the Laboratory

PU Yin-fang,SUN Ying-ying,YAN Bin-lun,ZHU Ming,

水生态学杂志 , 2009,

SHEN Qi-han,LIU Dun-yi,WANG Ping,GAO Ji-feng,ZHANG Yin-fang,

地球学报 , 1987,
Abstract: The Archaean Jining Group, of dominant granulite fades metamorphism, is stratigraphically the oldest metamorphic rock series in the south Nel Mongol of China.According to the metamorphic rock assemblages and rock chracteristics, the Jining Group can be subdivided into two rock formations.The lower part of the lower formation is mainly composed of pyroxene-plagioclase-granulite, intercalated with biotite hypersthene-plagioclase-gneis-ses, pyroxene-bearing plagioclase-amphibolite and pyroxenite, the upper part of the same formation mainly consists of hypersthene-(garnet ±) biotite-pla-gioclase-gneisses, intercalated with pyroxene-plagioclase granulite, and occasionally also thin-beded pyroxene-bearing magnetite-quartzite. The protoliths correspord to those of a basic-intermediate (-acidic) volcanic-sedimentary formation. The upper formation of this group is mainly composed of sillimanite-garnet-K-feldspar- (or two feldspars) gneisses, biotite-plagioclase-gneisses, garnet-quartzite, diopside-marble, and leuco-leptite, intercalated with pyroxene plagioclase-granulite in the lower part and with a graphite ore bed of several meters thick, in the basal part. The protoliths are those of a graphite-bearing semipelitic-cart onate formation, which is similar to these of the Khondalitic rocks of India.The U-Pb zircon and Rb-Sr whole rock iscchron method have been applied to dating this group.Cn the six U-Pb zircon and two Rb-Sr whole rock isochion results, con-bired with geologic features of this group, conclusions have been made as follows: 1. Zircon discordent dating for biotite-bearing hornblende-plagioclase-gne-iss of this group gives an age of 2467-35+54Ma. It is the oldest dating that has been obtained so far in this group. This result can be interpreted as the minimum age for late Archaean metamorphic event which may be correlated with the same event recognized in the Qianxi Group, eastern Hebei. 2. The lower limit of metamorphic age for the upper formation of the Jining Group seems to be older than 2316 Ma. (Rb-Sr) or 2359 Ma (U-Pb, allanite). 3. The other three zircon discordent data for gneisses and amphibolite of the upper formation from this goup give the ages of 1821, 1962 and 1957 Ma. They are interpreted as the age of early Proterozoic metamorphic event which is super-imposed on the late Archaean metamorphic event. The formation of the rather widespread pegmatites in this terrain is closely related to this metamorphic event. 4. The age of protolith of Jining Group should be older than 2500 Ma.
Switching in three-core nonlinear fiber coupler with second order coupling dispersion coefficient

Li Qi-Liang,Xie Yu-Yong,Zhu Yin-Fang,Zhao Zhi-Jing,Wang Tian-Shu,Qian Sheng,Lin Li-Bin,

物理学报 , 2008,
Abstract: 利用两种方法研究了高速光脉冲在具有交叉相位调制的等边三角形排列结构的非线性三芯光纤耦合器中传输和开关特性.首先利用变分原理得到三纤芯中传输转移系数随距离变化的方程,然后利用分裂步长傅里叶方法求得了光脉冲的数值解.变分法和数值模拟的结果表明:当一阶模间色散系数较小时,光脉冲仍能在三芯之间周期性耦合传输,并且表现出良好的开关特性,但是随着一阶模间色散系数的增大,脉冲耦合传输的周期性和陡峭的开关特性都遭到破坏,光脉冲在传输巾发牛分裂;二阶耦合色散系数和初始啁啾都能使光脉冲传输时的耦合长度变短、光脉冲在三纤芯之间能量转换的周期变小、开关阈值功率增加.其交义相位调制系数虽然对传输特性的影响较为微弱,但是使耦合器的开关阈值功率增加.
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