In this paper, a photoelectric signal obtained scheme via equator triangle pattern engraved on rotor is discussed and the mathematic model is deduced in the case which is deflexion between rotor axis and the coordinat...In this paper, a photoelectric signal obtained scheme via equator triangle pattern engraved on rotor is discussed and the mathematic model is deduced in the case which is deflexion between rotor axis and the coordinate frame of case. The deflexion error and coupling error under the situation are analyzed. Finally, three methods of engraving based on the spherical triangle pattern are presented. The error models of various methods are built up and the simulation curves are provided respectively. We have done the primary experiments on the surface of rotor using this method. It can be seen from the enlarged figures that the rim of the pattern is smooth and the demand of sensor resolution is satisfied by and large. The results of study supply reference for signal obtaining.展开更多
The purpose of this work has been to carry out a didactic exhibit at the Botanical Museum of the Department of Life and Environment of the University of Cagliari devoted to vegetal endemic or threatened species presen...The purpose of this work has been to carry out a didactic exhibit at the Botanical Museum of the Department of Life and Environment of the University of Cagliari devoted to vegetal endemic or threatened species present at the Mediterranean Basin. The Ceroplastics （wax sculpting） plays a very important role in this project. Species that have become rare or are somehow threatened in the natural environment and have fortunately been preserved ＂ex situ＂ at the Botanical Garden of Cagliari are reproduced as wax models. Models are made by cutting and shaping wax sheets over the flame of an alcohol lamp. Each model has been created by copying a real specimen cultivated at the Botanical Garden and as a ＂unique piece＂ without using preparatory moulds. The result has been to have at our disposal a collection of very realistic models and magnified particulars as for example the pollen grains. The accuracy of the representation gives visitors the chance to know the considered species by means of the models. In order to preserve the natural heritage it is of the utmost importance that divulgation and information be made available to everyone. The Botanical Museum of the University of Cagliari rediscovers the noble art of wax sculpting, which has been strongly linked to the spreading of scientific knowledge since the XVII century and nowadays it may contribute to raise the citizens＇ awareness of the most common environmental issues.展开更多
The emergence and development of Buddhist sculpture has completely changed the original Chinese ancient sculpture, rich China sculpture theme, greatly promote the development of the Chinese sculpture, in the Wei and J...The emergence and development of Buddhist sculpture has completely changed the original Chinese ancient sculpture, rich China sculpture theme, greatly promote the development of the Chinese sculpture, in the Wei and Jin Dynasties, Buddhist sculpture received considerable development, the art form is abundant, representative of the ＂ slim but clear appearance＂ and＂ images of noble figures ＂two kinds of modeling features. From the perspective of historical background and aesthetic orientation, this paper analyzes and studies the overall features of the art of carving art in this historical period, as well as its profound influence on the development of Chinese Buddhist statues.展开更多
Objective Mandibular angle ostectomy is usually applied to the facial contouring sculpture. We evaluated the various techniques in order to enhance the precision and avoid unnecessary damage. Methods Before operation ...Objective Mandibular angle ostectomy is usually applied to the facial contouring sculpture. We evaluated the various techniques in order to enhance the precision and avoid unnecessary damage. Methods Before operation the area and quantity resected bone were designed according to facial measurement, mandible pantomagraphy and orthophoria and lateral localized radiograph of skull. The Incises of mandibular angle ostectomy included intraoral, retroauricular or intraoral associated with retroauricular. Howerer, the sagittal resection of mandible outer table was necessary in all intraoral incise. Results Single mandibular angle ostectomy was not satisfactory for the patients having mandible hypertrophy with over-width basifacial contouring. Mandibular angle ostectomy combined with the sagittal resection of outer table of mandibular angle were required. Good symmetry and appearance were gained in 206 cases. One case had facial paralysis. Two patients occured mandibular fracture during the operation. Three cases complicated angled deformity at mandible body. Conclusion Reduction mandibuloplasty should be selected depends on varied types of mandibular angle hypertrophy before operation.展开更多
The rapid development of portable and wearable electronic devices has increased demand for flexible and efficient energy harvesting and storage units. Conventionally, these are built and used separately as discrete co...The rapid development of portable and wearable electronic devices has increased demand for flexible and efficient energy harvesting and storage units. Conventionally, these are built and used separately as discrete components. Herein, we propose a simple and cost-effective laser engraving technique for fabricating a flexible self-charging micro-supercapacitor power unit （SCMPU）, by integrating a triboelectric nanogenerator （TENG） and a micro-supercapacitor （MSC） array into a single device. The SCMPU can be charged directly by ambient mechanical motion. We demonstrate the ability of the SCMPU to continuously power light-emitting diodes and a commercial hygrothermograph. This inves- tigation may promote the development of sustainable self-powered systems and provide a promising new research application for supercapacitors.展开更多
A liquid metal enabled corrosion sculpture technique for quickly fabricating complex pattems on aluminum substrate is proposed and experimentally demonstrated. According to the conceptual investigation, it is clarifie...A liquid metal enabled corrosion sculpture technique for quickly fabricating complex pattems on aluminum substrate is proposed and experimentally demonstrated. According to the conceptual investigation, it is clarified that the width and the depth of a printed track are dominated by sculpture time and working temperature. The printed size can reach small values of 38 μm through controlling the sculpture time for 60 s. As the sculpture time was increased from 5 to 25 rain at 20℃, the depth of the fabricated pattern was improved from 13.3 to 25.6 μm. The sculptured depth of the pattern would increase from 13.3 to 106.9 μm when the sculpture time was fixed at 5 min and the temperature was raised from 20 to 60℃. To investigate the sculpture behavior in detail, the phases and microstructure of sculpture surface were quantitatively measured via a group of microscope imaging system with fundamental mechanisms interpreted. The present liquid metal sculpture method on aluminum substrate adds a new valuable soft tool for current metal engraving technology family.展开更多
文摘In this paper, a photoelectric signal obtained scheme via equator triangle pattern engraved on rotor is discussed and the mathematic model is deduced in the case which is deflexion between rotor axis and the coordinate frame of case. The deflexion error and coupling error under the situation are analyzed. Finally, three methods of engraving based on the spherical triangle pattern are presented. The error models of various methods are built up and the simulation curves are provided respectively. We have done the primary experiments on the surface of rotor using this method. It can be seen from the enlarged figures that the rim of the pattern is smooth and the demand of sensor resolution is satisfied by and large. The results of study supply reference for signal obtaining.
文摘The purpose of this work has been to carry out a didactic exhibit at the Botanical Museum of the Department of Life and Environment of the University of Cagliari devoted to vegetal endemic or threatened species present at the Mediterranean Basin. The Ceroplastics （wax sculpting） plays a very important role in this project. Species that have become rare or are somehow threatened in the natural environment and have fortunately been preserved ＂ex situ＂ at the Botanical Garden of Cagliari are reproduced as wax models. Models are made by cutting and shaping wax sheets over the flame of an alcohol lamp. Each model has been created by copying a real specimen cultivated at the Botanical Garden and as a ＂unique piece＂ without using preparatory moulds. The result has been to have at our disposal a collection of very realistic models and magnified particulars as for example the pollen grains. The accuracy of the representation gives visitors the chance to know the considered species by means of the models. In order to preserve the natural heritage it is of the utmost importance that divulgation and information be made available to everyone. The Botanical Museum of the University of Cagliari rediscovers the noble art of wax sculpting, which has been strongly linked to the spreading of scientific knowledge since the XVII century and nowadays it may contribute to raise the citizens＇ awareness of the most common environmental issues.
文摘The emergence and development of Buddhist sculpture has completely changed the original Chinese ancient sculpture, rich China sculpture theme, greatly promote the development of the Chinese sculpture, in the Wei and Jin Dynasties, Buddhist sculpture received considerable development, the art form is abundant, representative of the ＂ slim but clear appearance＂ and＂ images of noble figures ＂two kinds of modeling features. From the perspective of historical background and aesthetic orientation, this paper analyzes and studies the overall features of the art of carving art in this historical period, as well as its profound influence on the development of Chinese Buddhist statues.
文摘Objective Mandibular angle ostectomy is usually applied to the facial contouring sculpture. We evaluated the various techniques in order to enhance the precision and avoid unnecessary damage. Methods Before operation the area and quantity resected bone were designed according to facial measurement, mandible pantomagraphy and orthophoria and lateral localized radiograph of skull. The Incises of mandibular angle ostectomy included intraoral, retroauricular or intraoral associated with retroauricular. Howerer, the sagittal resection of mandible outer table was necessary in all intraoral incise. Results Single mandibular angle ostectomy was not satisfactory for the patients having mandible hypertrophy with over-width basifacial contouring. Mandibular angle ostectomy combined with the sagittal resection of outer table of mandibular angle were required. Good symmetry and appearance were gained in 206 cases. One case had facial paralysis. Two patients occured mandibular fracture during the operation. Three cases complicated angled deformity at mandible body. Conclusion Reduction mandibuloplasty should be selected depends on varied types of mandibular angle hypertrophy before operation.
文摘The rapid development of portable and wearable electronic devices has increased demand for flexible and efficient energy harvesting and storage units. Conventionally, these are built and used separately as discrete components. Herein, we propose a simple and cost-effective laser engraving technique for fabricating a flexible self-charging micro-supercapacitor power unit （SCMPU）, by integrating a triboelectric nanogenerator （TENG） and a micro-supercapacitor （MSC） array into a single device. The SCMPU can be charged directly by ambient mechanical motion. We demonstrate the ability of the SCMPU to continuously power light-emitting diodes and a commercial hygrothermograph. This inves- tigation may promote the development of sustainable self-powered systems and provide a promising new research application for supercapacitors.
基金supported by Beijing Municipal Science and Technology Project(Grant No.Z151100003715002)China Postdoctoral Science Foundation funded project(Grant No.2016M590137)
文摘A liquid metal enabled corrosion sculpture technique for quickly fabricating complex pattems on aluminum substrate is proposed and experimentally demonstrated. According to the conceptual investigation, it is clarified that the width and the depth of a printed track are dominated by sculpture time and working temperature. The printed size can reach small values of 38 μm through controlling the sculpture time for 60 s. As the sculpture time was increased from 5 to 25 rain at 20℃, the depth of the fabricated pattern was improved from 13.3 to 25.6 μm. The sculptured depth of the pattern would increase from 13.3 to 106.9 μm when the sculpture time was fixed at 5 min and the temperature was raised from 20 to 60℃. To investigate the sculpture behavior in detail, the phases and microstructure of sculpture surface were quantitatively measured via a group of microscope imaging system with fundamental mechanisms interpreted. The present liquid metal sculpture method on aluminum substrate adds a new valuable soft tool for current metal engraving technology family.
