With the theoretical framework of patent information life cycle,this research studies the relationship between patents' life patterns and technological development stages of the relevant field,using life status in...With the theoretical framework of patent information life cycle,this research studies the relationship between patents' life patterns and technological development stages of the relevant field,using life status in patent information life cycle as the research dimension. Data of patents issued in the field of wireless charging are retrieved from the United States Patent and Trademark Office Library. Citation information about these patents is also collected. By analyzing the temporal citation count data of patent information,the patents' life patterns using the RSD/P classification method are classified. This study found that the emergence of different life patterns of patent information has strong connection with the technological stage in which the patent information is located,and sleeping beauty patents have high hidden values. In the stage of technological development,attention should be paid to the identification of non-stationary patents. Rapid identification of high-value patents,i. e.,patents with certain life pattern,is instrumental to accelerate the development of technologies. This study provides a viable approach for identifying high-value patents of emerging technologies through empirical research.展开更多
This paper presents pattern formation in generalized cellular automata (GCA) by varying parameters of classic “game of life”. Different dynamic behaviors are classified. The influence of remembrance of dynamic behav...This paper presents pattern formation in generalized cellular automata (GCA) by varying parameters of classic “game of life”. Different dynamic behaviors are classified. The influence of remembrance of dynamic behavior of GCA is also studied. Experiments show the emergence of the self-organizing patterns that is analogous with life forms at the edge of chaos, which consist of certain nontrivial structure and go through periods of growth, maturity and death. We describe these experiments and discuss their potential as alternative way for creating artificial life and generative art, and as a new method for pattern genesis.展开更多
厘清“三生”空间土地利用的时空演变格局,探明驱动因素,为国土空间规划、土地利用转型提供科学依据。以天长市为研究区域,采用2009—2018年土地利用变更调查数据,借助土地利用转移矩阵、重心迁移等模型,测算研究区土地利用动态度及土...厘清“三生”空间土地利用的时空演变格局,探明驱动因素,为国土空间规划、土地利用转型提供科学依据。以天长市为研究区域,采用2009—2018年土地利用变更调查数据,借助土地利用转移矩阵、重心迁移等模型,测算研究区土地利用动态度及土地利用程度综合指数,采用灰色关联分析探究土地利用转型的驱动因素。结果表明:1)“三生”空间总体呈现“一增一稳一减”的特点,生产空间面积增长11.68 km 2,生活空间面积相对稳定,生态空间面积缩减了12.44 km 2,其中,农业生产用地一直保持持续增长态势,主要源于农村生活用地和水域生态用地的转入;2)工矿生产用地和城镇生活用地的空间集聚最为明显,其重心逐步向东南方向迁移;3)以2014年为界,天长市土地利用综合动态度前期为0.22%,后期为0.13%,其中,工矿生产用地和城镇生活用地的单一动态度增速最为明显,前期分别为2.95%与5.96%,后期分别为2.73%与1.73%,而土地利用程度综合指数增长1.13;4)人口、已建成水库总库容、建成区面积等因素对天长市“三生”空间的土地利用变化影响较大。展开更多
Background: Tooth surface loss (TSL) is a progressive process arising from erosion, abrasion, attrition or abfraction. It can affect individuals of any age group: children, young adult, adults or the elderly and can c...Background: Tooth surface loss (TSL) is a progressive process arising from erosion, abrasion, attrition or abfraction. It can affect individuals of any age group: children, young adult, adults or the elderly and can compromise the health of individual tooth or the entire dentition leading to poor quality of life of the affected person. Objective: To evaluate the pattern of TSL among dental patients in a Nigerian Teaching Hospital and to assess the impact of TSL on their quality of life. Subjects and Methods: The study was a cross-sectional study among patients with TSL in a Nigerian Teaching Hospital. The Oral Health Impact Profile-14 (OHIP-14) questionnaire was used to obtain information on the impact of TSL on the quality of life of the participants. Data collected were analysed using IBM SPSS version 20. Chi-square test was used to assess association between types of TSL and quality of life of the patients. Level of significance was set at p ≤ 0.05. Results: One hundred and twenty-five patients (Males = 72;Females = 53) with tooth wear lesions participated in the study. The most common type of tooth surface loss was attrition (40%) followed by abrasion (23.2%). The highest impact of TSL on the quality of life was painful sensation strongly affecting 39 (31.2%) patients. This was followed by problem with chewing. There was no statistically significant relationship between patients’ quality of life and types of tooth surface loss. Conclusion: The most common negative impact of TSL on patient quality of life was painful sensation.展开更多
基金Supported by the Youth Fund of the National Social Science Foundation of China(No.12CTQ025)
文摘With the theoretical framework of patent information life cycle,this research studies the relationship between patents' life patterns and technological development stages of the relevant field,using life status in patent information life cycle as the research dimension. Data of patents issued in the field of wireless charging are retrieved from the United States Patent and Trademark Office Library. Citation information about these patents is also collected. By analyzing the temporal citation count data of patent information,the patents' life patterns using the RSD/P classification method are classified. This study found that the emergence of different life patterns of patent information has strong connection with the technological stage in which the patent information is located,and sleeping beauty patents have high hidden values. In the stage of technological development,attention should be paid to the identification of non-stationary patents. Rapid identification of high-value patents,i. e.,patents with certain life pattern,is instrumental to accelerate the development of technologies. This study provides a viable approach for identifying high-value patents of emerging technologies through empirical research.
基金Project supported by the National Basic Research Program (973) of China (No. 2002CB312103), and Excellent Young Teacher Program of MOE, China
文摘This paper presents pattern formation in generalized cellular automata (GCA) by varying parameters of classic “game of life”. Different dynamic behaviors are classified. The influence of remembrance of dynamic behavior of GCA is also studied. Experiments show the emergence of the self-organizing patterns that is analogous with life forms at the edge of chaos, which consist of certain nontrivial structure and go through periods of growth, maturity and death. We describe these experiments and discuss their potential as alternative way for creating artificial life and generative art, and as a new method for pattern genesis.
文摘厘清“三生”空间土地利用的时空演变格局,探明驱动因素,为国土空间规划、土地利用转型提供科学依据。以天长市为研究区域,采用2009—2018年土地利用变更调查数据,借助土地利用转移矩阵、重心迁移等模型,测算研究区土地利用动态度及土地利用程度综合指数,采用灰色关联分析探究土地利用转型的驱动因素。结果表明:1)“三生”空间总体呈现“一增一稳一减”的特点,生产空间面积增长11.68 km 2,生活空间面积相对稳定,生态空间面积缩减了12.44 km 2,其中,农业生产用地一直保持持续增长态势,主要源于农村生活用地和水域生态用地的转入;2)工矿生产用地和城镇生活用地的空间集聚最为明显,其重心逐步向东南方向迁移;3)以2014年为界,天长市土地利用综合动态度前期为0.22%,后期为0.13%,其中,工矿生产用地和城镇生活用地的单一动态度增速最为明显,前期分别为2.95%与5.96%,后期分别为2.73%与1.73%,而土地利用程度综合指数增长1.13;4)人口、已建成水库总库容、建成区面积等因素对天长市“三生”空间的土地利用变化影响较大。
文摘Background: Tooth surface loss (TSL) is a progressive process arising from erosion, abrasion, attrition or abfraction. It can affect individuals of any age group: children, young adult, adults or the elderly and can compromise the health of individual tooth or the entire dentition leading to poor quality of life of the affected person. Objective: To evaluate the pattern of TSL among dental patients in a Nigerian Teaching Hospital and to assess the impact of TSL on their quality of life. Subjects and Methods: The study was a cross-sectional study among patients with TSL in a Nigerian Teaching Hospital. The Oral Health Impact Profile-14 (OHIP-14) questionnaire was used to obtain information on the impact of TSL on the quality of life of the participants. Data collected were analysed using IBM SPSS version 20. Chi-square test was used to assess association between types of TSL and quality of life of the patients. Level of significance was set at p ≤ 0.05. Results: One hundred and twenty-five patients (Males = 72;Females = 53) with tooth wear lesions participated in the study. The most common type of tooth surface loss was attrition (40%) followed by abrasion (23.2%). The highest impact of TSL on the quality of life was painful sensation strongly affecting 39 (31.2%) patients. This was followed by problem with chewing. There was no statistically significant relationship between patients’ quality of life and types of tooth surface loss. Conclusion: The most common negative impact of TSL on patient quality of life was painful sensation.
