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量化地图的表示方法 被引量:1
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作者 胡引翠 董硕 《地图》 北大核心 2000年第3期22-25,共4页
关键词 量化地图 分级设色法 代号标注法 数值
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Normal Reference Value of Red Blood Cell Count of Chinese Presenile Men and Geographical Factors 被引量:2
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作者 HE Jinwei GE Miao +2 位作者 SU Huimin LIANG Wei CHEN Hongfei 《Chinese Geographical Science》 SCIE CSCD 2007年第1期92-98,共7页
This paper aims at providing a scientific basis for unifying the normal reference value standards of red blood cell count of Chinese presenile men. The paper, using microscopical counting method, studies the relations... This paper aims at providing a scientific basis for unifying the normal reference value standards of red blood cell count of Chinese presenile men. The paper, using microscopical counting method, studies the relationship between the normal reference values of 38,061 samples of red blood cell count of presenile men and eight geographical factors in 297 units in China. It is found that the correlation of geographical factors and the normal reference value of red blood cell count of presenile men is quite significant (F=303.00, P=-0.000). By using the method of stepwise regression analysis, one regression equation is inferred. It is concluded that if geographical data are obtained in a certain area, the normal reference value of red blood cell count of presenile men in this area can be reckoned by using the regression analysis. Furthermore, according to the geographical factors, China can be divided into eight regions: Northeast China Region, North China Region, Shanxi-Shaanxi-Irmer Mongolia Region, Middle and Lower Reaches of the Changjiang River Region, Southeast China Region, Northwest China Region, Southwest China Region and Qinghai-Tibet Plateau Region. 展开更多
关键词 red blood cell count normal reference value geographical factors regression analysis
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Magnetic Resonance Imaging and Biological Markers in Pituitary Adenomas with Invasion of the Cavernous Sinus Space
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作者 潘力雄 刘运生 +1 位作者 赵继红 陈忠平 《The Chinese-German Journal of Clinical Oncology》 CAS 2005年第1期30-35,67,共7页
Objective: To investigate the predictability of MRI and the possiblebiological markers of cavernous sinus invasion of pituitary adenomas associated with fourphenomenas: angiogenesis, cell proliferation, apoptosis and ... Objective: To investigate the predictability of MRI and the possiblebiological markers of cavernous sinus invasion of pituitary adenomas associated with fourphenomenas: angiogenesis, cell proliferation, apoptosis and matrix metalloproteinase. Methods: Weevaluated 45 patients with pituitary adenoma according to the MRI, surgical findings and theimmunohistochemistry staining of tumor tissues. Results: The results have shown that the sensitivityof MRI for predicting cavernous sinus invasion in this prospective study was 60%, its specificity85%, its positive predictive value 83.33%, negative predictive value 62.96%. 45 specimens ofpituitary adenomas were analyzed for expression of F8, VEGF, Ki-67, c-myc, Bcl-2, nm23 and MMP-9immunoreactivity using immunoperoxidase staining. MVD was assessed using F8-related antigen. Theresults have shown that MVD of invasive pituitary adenomas was significantly higher than that ofnoninvasive (P 【 0.001). There was an association between the invasion of pituitary adenomas andKi-67 LI (P = 0.039) or the expression of VEGF (P 【 0.001) and MMP-9 (P 【 0.001). But c-myc LI andBcl-2 expression have no association with invasiveness of pituitary adenomas (P = 0.061 versus P =0.201). On the other hand, there is an inverse relationship between nm23 expression and tumorinvasion (P 【 0.001). Conclusion: Parasellar extension of pituitary adenomas through the medial wallof the cavernous sinus is diagnosed at surgery, and with sensitive gadolinium-enhanced MRI, itsextent can be partly determined by radiology. Although our study has shown that MVD and theexpression of VEGF, Ki-67, nm23 and MMP-9 have associations with invasiveness of pituitary adenomas,they are lack of specificity. These markers can only provide some useful information. 展开更多
关键词 MRI biological markers invasion of cavernous sinus pituitary adenoma
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Inheritance of Late Maturity α-amylase (LMA) in a Recombinant Inbreed Lines of Chuanmai 42 Crossed with Chuannong 16
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作者 YANG En-nian ZHANG Yu LI Jun TANG Yong-lu YANG Wu-yun ZOU Yu-chun 《Agricultural Science & Technology》 CAS 2011年第3期322-323,329,共3页
[Objective] To study the inheritance and possible molecular marker of α-LMA and their relations to falling number. [Method] Recombined inbreed lines (RILS) of Chuanmai 42 (LMA genotype) crossed with Chuannong 16 (no ... [Objective] To study the inheritance and possible molecular marker of α-LMA and their relations to falling number. [Method] Recombined inbreed lines (RILS) of Chuanmai 42 (LMA genotype) crossed with Chuannong 16 (no LMA) were employed to test the late maturity α-amylase (LMA) by EL ISA kits,the Falling Number (FN),and three QTL,SSR markers (Xgwm 577,Xwmc276,Xwmc273) of LMA gene. [Result] Results suggested that LMA was controlled by a single,and the three SSR markers seemed to be not efficient to test LMA gene in this RILS. LMA was an important factor on FN,meanwhile FN was also affected by other factors. [Conclusion] The study could provide references for the breed of quality wheat. 展开更多
关键词 Late maturity α-amylase (LMA) Falling number (FN) SSR s RILS
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Empirical Study on B/C Apparel Consumption Behavior Based on Data Mining Technology 被引量:1
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作者 梁建芳 梁建明 王剑萍 《Journal of Donghua University(English Edition)》 EI CAS 2013年第6期530-536,共7页
In order to accurately identify the characters associated with consumption behavior of apparel online shopping, a typical B/ C clothing enterprise in China was chosen. The target experimental database containing 2000 ... In order to accurately identify the characters associated with consumption behavior of apparel online shopping, a typical B/ C clothing enterprise in China was chosen. The target experimental database containing 2000 data records was obtained based on web service logs of sample enterprise. By means of clustering algorithm of Clementine Data Mining Software, K-means model was set up and 8 clusters of consumer were concluded. Meanwhile, the implicit information existed in consumer's characters and preferences for clothing was found. At last, 31 valuable association rules among casual wear, formal wear, and tie-in products were explored by using web analysis and Aprior algorithm. This finding will help to better understand the nature of online apparel consumption behavior and make a good progress in personalization and intelligent recommendation strategies. 展开更多
关键词 consumption behavior online shopping apparel industry data mining
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Stochastic Resonance as a Mathematical Model of an Electrogastrogram
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作者 Matsuura Yasuyuki Miyao Masaru Takada Hiroki 《Journal of Physical Science and Application》 2012年第6期186-194,共9页
An electrogastrogram (EGG) is a recording of the electrical activity in the stomach, as measured on the abdominal surface. In this study, the goal is to obtain a mathematical model of an EGG; to achieve this, the EG... An electrogastrogram (EGG) is a recording of the electrical activity in the stomach, as measured on the abdominal surface. In this study, the goal is to obtain a mathematical model of an EGG; to achieve this, the EGG of 14 subjects (seven males and seven females) will be obtained. Initially, the Wayland algorithm to the EGG to measure the degree of determinism is applied. However, it could not be determined whether the EGG could be generated by a chaotic process. In addition, the waveform of the electric potential in the interstitial cells of Cajal is similar to the graphs of the numerical solutions to the Van der Pol equation. Therefore, the Van der Pol equation to a periodic function was added, and random white noise was used to represent the intestinal motility and other biosignals. The EGG and numerical solutions were compared and evaluated on the basis of the translation error (Etrans) in the Wayland algorithm and the maximum Lyapunov exponent (2) in Rosenstein's algorithm. By projecting the data from an obtained stationary EGG from the subjects, along with the numerical solutions, onto the Etrans-λ plane, the affinity between them was qualitatively evaluated. The EGG was well described by stochastic resonance from the stochastic differential equations. 展开更多
关键词 ELECTROGASTROGRAPHY numerical solution Wayland algorithm maximum Lyapunov exponent stochastic resonance.
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“万以内数的读法和写法”教学要点
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作者 段玉江 《云南教育(小学教师)》 1997年第Z1期72-73,共2页
关键词 读写教学 形成技能 教学过程 计数器 数的组成 记数值 数的法则 诱导方法 四位数 认知规律
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A NOTE ON STABILITY OF THE SPLIT-STEP BACKWARD EULER METHOD FOR LINEAR STOCHASTIC DELAY INTEGRO-DIFFERENTIAL EQUATIONS 被引量:1
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作者 Feng JIANG Yi SHEN Xiaoxin LIAO 《Journal of Systems Science & Complexity》 SCIE EI CSCD 2012年第5期873-879,共7页
In the literature (Tan and Wang, 2010), Tan and Wang investigated the convergence of the split-step backward Euler (SSBE) method for linear stochastic delay integro-differential equations (SDIDEs) and proved the... In the literature (Tan and Wang, 2010), Tan and Wang investigated the convergence of the split-step backward Euler (SSBE) method for linear stochastic delay integro-differential equations (SDIDEs) and proved the mean-square stability of SSBE method under some condition. Unfortu- nately, the main result of stability derived by the condition is somewhat restrictive to be applied for practical application. This paper improves the corresponding results. The authors not only prove the mean-square stability of the numerical method but also prove the general mean-square stability of the numerical method. Furthermore, an example is given to illustrate the theory. 展开更多
关键词 General mean-square stability mean-square stability split-step backward Euler method stochastic delay integro-differential equations.
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