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Empirical Line Method Using Spectrally Stable Targets to Calibrate IKONOS Imagery

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Pedosphere 2008年第1期18卷 124-130页

作者： xu jun-feng Institute of Agricultural Remote Sensing and Information Technology Zhejiang University Hangzhou 310029 （China）.

By using speetrally stable targets, the empirical line （EL） method was tested to correct the multispectral IKONOS imagery acquired over Putuo Mountain, Zhejiang, China. A series of calibration targets, which were spectrally stable over time, were selected to establish the linear predicted equation. Subsequently, a series of spectrally stable validation targets were selected to assess the accuracy of the equations. And, validation targets, which were speetrally unstable over time, were used to test the feasibility of using the EL method to calibrate the archival remotely sensed data. Ground reflectance measurements for each target were made using an ASD FieldSpec spectroradiometer. A Trimble GeoXTTM GPS unit with sub-meter accuracy was used to estimate the target position accurately. Linear regression equations for four tKONOS bands were derived. The coefficients of determination for the blue, green, and red bands were all greater than 0.9800 and it was 0.9697 for the near infrared band. It was concluded that reasonable results could be obtained by using speetrally stable targets.

关键词： calibration empirical line method, IKONOS spectrally stable targets

Clinical Study on Puncturing Weizhong (BL 40) for Post-stroke Dysfunction of the Lower Limbs

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Journal of Acupuncture and Tuina Science 2013年第4期11卷 208-211页

作者： xu jun-feng HuangGuo-qi Special Wards of Acupuncture Department the First Hospital Affiliated to Tianjin University of Traditional Chinese Medicine

Objective： To observe the clinical effects in the treatment of post-stroke dysfunction of lower limb by puncturing Weizhong （BL 40）. Methods： One hundred and twenty patients were randomly divided into two groups, 60 cases in each group. Both groups were treated by puncturing Weizhong （BL 40） plus functional rehabilitation training, once every day. Those in the observation group were treated by Shi xue-min＇s needling technique, while others in the control group were treated with routine needling technique. The therapeutic effects were assessed by the scores of lower limb functions of Lovett scale of grading muscle strength （LSGMS） and short-form FugI-Meyer assessment （SFFMA）. Results： The instant and post-treatment effective rates in the observation group were 83.3% and 93.3%, versus 6.7% and 53.3% in the control group, indicating that the therapeutic effect was better in the observation group （P〈0.01）. The instant and post-treatment scores of Lovett muscle strength grading scale were better in the observation group than that in the control group （P〈0.05）. SFFMA score of lower limbs function was better in the observation group than that in the control group （P〈0.0s）. Conclusion： Different needling methods at Weizhong （BL 40） can produce different therapeutic effects in treating post-stroke dysfunction of lower limb, and Shi＇s needling technique has obvious instant effect and therapeutic function.

关键词： Acupuncture Therapy Stroke Complications Point, Weizhong (BL 40) Dyskinesias

Image stabilization with support vector machine

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Journal of Zhejiang University-Science C(Computers and Electronics) 2011年第6期12卷 478-485页

作者： Wen-de DONG Yue-ting CHEN Zhi-hai xu Hua-jun feng Qi LI State Key Laboratory of Optical Instrumentation Zhejiang University Hangzhou 31002 7 China

We propose an image stabilization method based on support vector machine (SVM). Since SVM is very effective in solving nonlinear regression problems, an SVM model was constructed and trained to simulate the vibration characteristic. Then this model was used to predict and compensate for the vibration. A simulation system was built and four assessment metrics including the signal-to-noise ratio (SNR), gray mean gradient (GMG), Laplacian (LAP), and modulation transfer function (MTF) were used to verify our approach. Experimental results showed that this new method allows the image plane to locate stably on the CCD, and high quality images can be obtained.

关键词： Support vector machine (SVM) Vibration Displacement Prediction Compensation

Novel linear search for support vector machine parameter selection

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Journal of Zhejiang University-Science C(Computers and Electronics) 2011年第11期12卷 885-896页

作者： Hong-xia PANG Wen-de DONG Zhi-hai xu Hua-jun feng Qi LI Yue-ting CHEN State Key Laboratory of Optical Instrumentation Zhejiang University Hangzhou 310027 China

Selecting the optimal parameters for support vector machine (SVM) has long been a hot research topic. Aiming for support vector classification/regression (SVC/SVR) with the radial basis function (RBF) kernel, we summarize the rough line rule of the penalty parameter and kernel width, and propose a novel linear search method to obtain these two optimal parameters. We use a direct-setting method with thresholds to set the epsilon parameter of SVR. The proposed method directly locates the right search field, which greatly saves computing time and achieves a stable, high accuracy. The method is more competitive for both SVC and SVR. It is easy to use and feasible for a new data set without any adjustments, since it requires no parameters to set.

关键词： Support vector machine (SVM) Rough line rule Parameter selection Linear search Motion prediction

Increased interleukin 6 inplasma of schizophrenic patients treated with neuroleptic drugs

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吉林大学学报(医学版) 1995年第4期 370-372页

作者： xu Haimin,Liu jun,feng Lihua(Deportment of Biochemistry,The First Clincal College)

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Ｉｎｃｒｅａｓｅｄｉｎｔｅｒｌｅｕｋｉｎ６ｉｎｐｌａｓｍａｏｆｓｃｈｉｚｏｐｈｒｅｎｉｃｐａｔｉｅｎｔｓｔｒｅａｔｅｄｗｉｔｈｎｅｕｒｏｌｅｐｔｉｃｄｒｕｇｓｘｕＨａｉｍｉｎ，ＬｉｕＪｕｎ，ＦｅｎｇＬｉｈｕａ（ＤｅｐｏｒｔｍｅｎｔｏｆＢｉｏｃｈｅｍｉ...

关键词： IL一6 IL一Lβ TNF一α neuroleptics schizophrenia

Relationships between Weight Status and Bullying Victimization among School-aged Adolescents in Guangdong Province of China

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Biomedical and Environmental Sciences 2010年第2期23卷 108-112页

作者： QIAO-ZHI GUO, WEN-jun MA, SHAO-PING NIE, YAN-jun xu, HAO-feng xu, AND YU-RUN ZHANG Department of Noncommunicable Disease Control and Prevention, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou 510300, Guangdong, China Department of Noncommunicable Disease Control and Prevention Guangdong Provincial Center for Disease Control and Prevention Guangzhou 510300 Guangdong China

Objective To examine relationships between weight status and different forms of bullying victimization among adolescents aged 11-18 years. Methods The relationships between weight status and bullying victimization （physical, verbal, and relational） were examined utilizing data from the Guangdong Provincial Youth Health Behavior Survey. Data on height, weight, and victimization behaviors were collected by self-reporting from 12 439 subjects, Х^2 test and logistic regression were used to analyze relationships between weight and bullying victimization. Results The incidence of victimization for adolescents aged 11-18 years was 8.6%, with higher rates for boys （12.4%） than for girls （4.7%）. For children with normal, overweight and obese body mass index （BMI）, the incidence rates of victimization were 8,2%, 17.3%, and 11.5%, respectively. Compared to normal weight, overweight was a risk factor for bullying victimization（OR=1.60, 95% CI： 1.18-2.17）, and it also increased children＇s risk of being teased in a hurtful way （OR=2.13, 95% CI： 1.41-3.24） and being made fun of due to physical appearance （OR=3.58, 95% CI： 2.27-5.67）. Obesity only increased the risk for children of being made tim of due to physical appearance （OR=2.45, 95% CI： 1.44-4.15）. Conclusions The victimization for children at school is common in Guangdong province, China. Overweight and obese children are more likely to be victims of bullying behaviors, especially verbal victimization.

关键词： Body mass index Adolescents Victimization

Construction and Implementation of Expert System for Common Pig Diseases Prevention Based on Struts Framework

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Animal Husbandry and Feed Science 2010年第5期2卷 41-43,48页

作者： xu Zhi-jun GAO feng College of Agriculture Jilin University Changchun 130062 China

The prevention of common pig diseases depends on the experience of veterinarian greatly due to complexity of piggery pestilence. The expert system for the prophylaxis and treatment of common pig diseases is able to make the complex task more effective. The construction and im- plementation of this expert system is based on the bottleneck problems of the traditional expert system knowledge acquisition and the frame descrip- tion of symptoms of common pig diseases, used the knowledge project method and technology, and combined the uncertainty inference and dispel- ling strategy of matching conflict and technology of multimedia. This expert system is used to imitate expert thinking and supplement or substitute for veterinary experts to guide the prophylaxis and treatment of common pig diseases. The overall structure, knowledge expression, inference mecha- nism and system realization would be expounded emphatically.

关键词： Expert system Common pig diseases Prevention Struts frame

Value Distribution of a Class of Differential Polynomials

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Chinese Quarterly Journal of Mathematics 2010年第1期25卷 23-29页

作者： xu jun-feng ZHANG Zhan-liang Department of Mathematics and Physics Wuyi University Jiangmen 529020 China Department of Mathematics Zhaoqing University Zhaoqing 526061 China

Let f（z） be a transcendental meromorphic function in the complex plane and a ≠0 be a constant, for any positive integer m, n, k, satisfy m ≥ nk＋n＋2, ψ= f^m ＋a（f^（κ））^n has infinitely many zeros. The corre... 详细信息

关键词： meromorphic function differential polynomials zeros normal family

基于定子磁链自适应观测的永磁同步电机直接转矩控制系统

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中国电机工程学报 2006年第12期26卷 122-127页

作者：冯江华许峻峰中南大学信息科学与工程学院湖南省长沙市410083 株洲南车电气股份有限公司技术中心湖南省株洲市412001

为了克服系统的时变性及在系数矩阵中的参数确切值未知的情况下也能实现对永磁同步电动机定子磁链的准确观测,提出了基于模型参考自适应的永磁同步电动机定子磁链观测方法。将电机运行过程中变化最大的参数——定子电阻作为可变参数,以... 详细信息

为了克服系统的时变性及在系数矩阵中的参数确切值未知的情况下也能实现对永磁同步电动机定子磁链的准确观测,提出了基于模型参考自适应的永磁同步电动机定子磁链观测方法。将电机运行过程中变化最大的参数——定子电阻作为可变参数,以定子磁链为状态变量的电机状态方程作为参考模型,将定子磁链状态观测器作为可调模型,通过对定子电阻自适应律的推导得出定子磁链自适应观测器。通过自适应观测器与全维状态观测器对永磁同步电动机定子磁链观测效果的对比发现:自适应观测器对定子磁链观测的准确度更高、对定子电阻等电机参数变化的鲁棒性更强。

关键词：定子磁链自适应永磁同步电动机直接转矩控制时变系统