A simulation code,GOAT,is developed to simulate single-bunch intensity-dependent effects and their interplay in the proton ring of the Electron-Ion Collider in China(EicC)project.GOAT is a scalable and portable macrop...A simulation code,GOAT,is developed to simulate single-bunch intensity-dependent effects and their interplay in the proton ring of the Electron-Ion Collider in China(EicC)project.GOAT is a scalable and portable macroparticle tracking code written in Python and coded by object-oriented programming technology.It allows for transverse and longitudinal tracking,including impedance,space charge effect,electron cloud effect,and beam-beam interaction.In this paper,physical models and numerical approaches for the four types of high-intensity effects,together with the benchmark results obtained through other simulation codes or theories,are presented and discussed.In addition,a numerical application of the cross-talk simulation between the beam-beam interaction and transverse impedance is shown,and a dipole instability is observed below the respective instability threshold.Different mitigation measures implemented in the code are used to suppress the instability.The flexibility,completeness,and advancement demonstrate that GOAT is a powerful tool for beam dynamics studies in the EicC project or other high-intensity accelerators.展开更多
Background: Patients with dementia who accidentally swallowed a press- through package (PTP) have been increased in recent years. Swallowed PTP is usually detected with CT having a risk of radiation exposure since PTP...Background: Patients with dementia who accidentally swallowed a press- through package (PTP) have been increased in recent years. Swallowed PTP is usually detected with CT having a risk of radiation exposure since PTP is very difficult to detect with abdominal X-ray image. Purpose: This study is aimed at developing the new PTP sheet recognizable with abdominal X-ray by improving the conventional PTP sheet. Material and Methods: The PTP sheet samples used in this study are: No. 1 Control: Commercially available tablet 100 mg, No. 2 Triple-stacked aluminum foil, 6-overcoated with BaSO4 10.3 g/m2, No. 3 Aluminum foil, 6-overcoated with BaSO4 10.3 g/m2, No. 4 Five-stacked aluminum foil, 6-overcoated with BaSO4 No. 5 Aluminum foil, single-coated with WO3 2.55 g/m2, No. 6 Aluminum foil, double-coated with WO3 5.1 g/m2, No. 7 Aluminum foil, triple-coated with WO3 7.66 g/m2, No. 8 Three-stacked aluminum foil, triple-coated with WO3. PTP sheets (No. 1 - No. 8) were placed inside the abdominal soft tissue phantom, and the images were obtained using FUJIFILM DR CALNEO PT. Region of interest (ROI) was placed on PTP sheets (No. 1 - No. 8) and abdominal soft tissue liquid phantom, and each contrast was measured from the average pixel of the two ROIs. Contrast was calculated by the calculation formula. Each ROI was measured three times, and their average value and standard deviation were estimated. Results: Statistical significance in contrast was not observed in commercial PTP sheet (No. 1), PTP sheet (No. 3), and PTP sheet (No. 5), while there was a significant difference between PTP sheet (No. 1) and PTP sheet (No. 2), PTP sheet (No. 4) PTP sheet (No. 6), PTP sheet (No. 7) (p Conclusion: The other all prototype PTP sheets (No. 2, No. 4, No. 6, No. 7 and No. 8) were well recognized. PTP sheets (No. 2, No. 4) of BaSO4 is considered to be more suitable than PTP sheets of WO3 (No. 6, No. 7, No. 8) because it is easier to produce. We will develop oral PTP sheets for patients with dementia for abdominal X-ray in the future.展开更多
The discovery of the first Fe-based ferromagnetic amorphous alloy in 1966 had made an impact on conventional magnetic materials because of its unique properties. Since then, a number of amorphous magnetic materials ha...The discovery of the first Fe-based ferromagnetic amorphous alloy in 1966 had made an impact on conventional magnetic materials because of its unique properties. Since then, a number of amorphous magnetic materials have been successfully developed and used in a wide variety of applications. A brief review of R & D activities on amorphous soft magnetic materials in China is given from the beginning to the present in a somewhat chronological order, followed by a brief introduction to their applications on electric and electronic industries. An analysis and a prospect of Chinese market of such amorphous materials are also presented.展开更多
The World Commission on Environment and Development in its report entitled“Our Common Future”has put forward the idea of sustainable development which is also an important part of the development of regional environ...The World Commission on Environment and Development in its report entitled“Our Common Future”has put forward the idea of sustainable development which is also an important part of the development of regional environmental law in Southeast Asia.In 1985 ASEAN Agreement on the Nature and Natural Resources has put sustainable development for the first time in ASEAN’s treaty.Sustainable development continues to grow through the 1987 Jakarta Resolution on Sustainable Development agreed upon by the leaders of ASEAN.This research will look at the importance of sustainable development as part of the regional environmental international law concept and how it has grown in ASEAN today.The purpose of this research is to know the various international agreements both soft law and hard law that puts sustainable development as an important element.The results show that sustainable development has become an integral part of the regional international environmental legal system in ASEAN.A provisional conclusion shows that ASEAN’s commitment to sustainable development has greatly improved the success of implementing environmental policies at the ASEAN level.展开更多
Postoperative adhesion(POA)widely occurs in soft tissues and usually leads to chronic pain,dysfunction of adjacent organs and some acute complications,seriously reducing patients’quality of life and even being life-t...Postoperative adhesion(POA)widely occurs in soft tissues and usually leads to chronic pain,dysfunction of adjacent organs and some acute complications,seriously reducing patients’quality of life and even being life-threatening.Except for adhesiolysis,there are few effective methods to release existing adhesion.However,it requires a second operation and inpatient care and usually triggers recurrent adhesion in a great incidence.Hence,preventing POA formation has been regarded as the most effective clinical strategy.Biomaterials have attracted great attention in preventing POA because they can act as both barriers and drug carriers.Nevertheless,even though much reported research has been demonstrated their efficacy on POA inhibition to a certain extent,thoroughly preventing POA formation is still challenging.Meanwhile,most biomaterials for POA prevention were designed based on limited experiences,not a solid theoretical basis,showing blindness.Hence,we aimed to provide guidance for designing anti-adhesion materials applied in different soft tissues based on the mechanisms of POA occurrence and development.We first classified the postoperative adhesions into four categories according to the different components of diverse adhesion tissues,and named them as“membranous adhesion”,“vascular adhesion”,“adhesive adhesion”and“scarred adhesion”,respectively.Then,the process of the occurrence and development of POA were analyzed,and the main influencing factors in different stages were clarified.Further,we proposed seven strategies for POA prevention by using biomaterials according to these influencing factors.Meanwhile,the relevant practices were summarized according to the corresponding strategies and the future perspectives were analyzed.展开更多
基金supported by the National Science Fund for Distinguished Young Scholars (No.11825505)the National Key R&D Program of China (No.2019YFA0405400)。
文摘A simulation code,GOAT,is developed to simulate single-bunch intensity-dependent effects and their interplay in the proton ring of the Electron-Ion Collider in China(EicC)project.GOAT is a scalable and portable macroparticle tracking code written in Python and coded by object-oriented programming technology.It allows for transverse and longitudinal tracking,including impedance,space charge effect,electron cloud effect,and beam-beam interaction.In this paper,physical models and numerical approaches for the four types of high-intensity effects,together with the benchmark results obtained through other simulation codes or theories,are presented and discussed.In addition,a numerical application of the cross-talk simulation between the beam-beam interaction and transverse impedance is shown,and a dipole instability is observed below the respective instability threshold.Different mitigation measures implemented in the code are used to suppress the instability.The flexibility,completeness,and advancement demonstrate that GOAT is a powerful tool for beam dynamics studies in the EicC project or other high-intensity accelerators.
文摘Background: Patients with dementia who accidentally swallowed a press- through package (PTP) have been increased in recent years. Swallowed PTP is usually detected with CT having a risk of radiation exposure since PTP is very difficult to detect with abdominal X-ray image. Purpose: This study is aimed at developing the new PTP sheet recognizable with abdominal X-ray by improving the conventional PTP sheet. Material and Methods: The PTP sheet samples used in this study are: No. 1 Control: Commercially available tablet 100 mg, No. 2 Triple-stacked aluminum foil, 6-overcoated with BaSO4 10.3 g/m2, No. 3 Aluminum foil, 6-overcoated with BaSO4 10.3 g/m2, No. 4 Five-stacked aluminum foil, 6-overcoated with BaSO4 No. 5 Aluminum foil, single-coated with WO3 2.55 g/m2, No. 6 Aluminum foil, double-coated with WO3 5.1 g/m2, No. 7 Aluminum foil, triple-coated with WO3 7.66 g/m2, No. 8 Three-stacked aluminum foil, triple-coated with WO3. PTP sheets (No. 1 - No. 8) were placed inside the abdominal soft tissue phantom, and the images were obtained using FUJIFILM DR CALNEO PT. Region of interest (ROI) was placed on PTP sheets (No. 1 - No. 8) and abdominal soft tissue liquid phantom, and each contrast was measured from the average pixel of the two ROIs. Contrast was calculated by the calculation formula. Each ROI was measured three times, and their average value and standard deviation were estimated. Results: Statistical significance in contrast was not observed in commercial PTP sheet (No. 1), PTP sheet (No. 3), and PTP sheet (No. 5), while there was a significant difference between PTP sheet (No. 1) and PTP sheet (No. 2), PTP sheet (No. 4) PTP sheet (No. 6), PTP sheet (No. 7) (p Conclusion: The other all prototype PTP sheets (No. 2, No. 4, No. 6, No. 7 and No. 8) were well recognized. PTP sheets (No. 2, No. 4) of BaSO4 is considered to be more suitable than PTP sheets of WO3 (No. 6, No. 7, No. 8) because it is easier to produce. We will develop oral PTP sheets for patients with dementia for abdominal X-ray in the future.
文摘The discovery of the first Fe-based ferromagnetic amorphous alloy in 1966 had made an impact on conventional magnetic materials because of its unique properties. Since then, a number of amorphous magnetic materials have been successfully developed and used in a wide variety of applications. A brief review of R & D activities on amorphous soft magnetic materials in China is given from the beginning to the present in a somewhat chronological order, followed by a brief introduction to their applications on electric and electronic industries. An analysis and a prospect of Chinese market of such amorphous materials are also presented.
文摘The World Commission on Environment and Development in its report entitled“Our Common Future”has put forward the idea of sustainable development which is also an important part of the development of regional environmental law in Southeast Asia.In 1985 ASEAN Agreement on the Nature and Natural Resources has put sustainable development for the first time in ASEAN’s treaty.Sustainable development continues to grow through the 1987 Jakarta Resolution on Sustainable Development agreed upon by the leaders of ASEAN.This research will look at the importance of sustainable development as part of the regional environmental international law concept and how it has grown in ASEAN today.The purpose of this research is to know the various international agreements both soft law and hard law that puts sustainable development as an important element.The results show that sustainable development has become an integral part of the regional international environmental legal system in ASEAN.A provisional conclusion shows that ASEAN’s commitment to sustainable development has greatly improved the success of implementing environmental policies at the ASEAN level.
基金financial support from the National Natural Science Foundation of China(Nos.32171345,T2288101,U20A20390,and 11827803)Fok Ying Tung Education Foundation(No.141039)+1 种基金International Joint Research Center of Aerospace Biotechnology and Medical Engineering,Ministry of Science and Technology of China,the 111 Project(No.B13003)the Academic Excellence Foundation of BUAA for PhD Students.
文摘Postoperative adhesion(POA)widely occurs in soft tissues and usually leads to chronic pain,dysfunction of adjacent organs and some acute complications,seriously reducing patients’quality of life and even being life-threatening.Except for adhesiolysis,there are few effective methods to release existing adhesion.However,it requires a second operation and inpatient care and usually triggers recurrent adhesion in a great incidence.Hence,preventing POA formation has been regarded as the most effective clinical strategy.Biomaterials have attracted great attention in preventing POA because they can act as both barriers and drug carriers.Nevertheless,even though much reported research has been demonstrated their efficacy on POA inhibition to a certain extent,thoroughly preventing POA formation is still challenging.Meanwhile,most biomaterials for POA prevention were designed based on limited experiences,not a solid theoretical basis,showing blindness.Hence,we aimed to provide guidance for designing anti-adhesion materials applied in different soft tissues based on the mechanisms of POA occurrence and development.We first classified the postoperative adhesions into four categories according to the different components of diverse adhesion tissues,and named them as“membranous adhesion”,“vascular adhesion”,“adhesive adhesion”and“scarred adhesion”,respectively.Then,the process of the occurrence and development of POA were analyzed,and the main influencing factors in different stages were clarified.Further,we proposed seven strategies for POA prevention by using biomaterials according to these influencing factors.Meanwhile,the relevant practices were summarized according to the corresponding strategies and the future perspectives were analyzed.
