We construct two conical surfaces which take non-coplanar lines as generatrix and rational Bezier curve as ridge-line, and prove that the intersecting line of conical surface has similar properties to Bezier curve. Th...We construct two conical surfaces which take non-coplanar lines as generatrix and rational Bezier curve as ridge-line, and prove that the intersecting line of conical surface has similar properties to Bezier curve. Then, the smoothly blending of two cylinders whose axes are non-coplanar is realized by taking intersecting line of conical surface as axes.展开更多
The facilities of 50 kl/a TDI unit at the North Jinghua Polyurethane Company in Liaoning province have been operating smoothly and safely for 158 h to deliver 500 tons of first-grade TDI products.The construction of t...The facilities of 50 kl/a TDI unit at the North Jinghua Polyurethane Company in Liaoning province have been operating smoothly and safely for 158 h to deliver 500 tons of first-grade TDI products.The construction of this project has incarnated that the North Jinghua Polyurethane Company has completely mastered the TDI production technique.展开更多
At 8:30 on October 27, the first international flight from Shanghai to Singapore MU576 took off at Pudong Airport. Thus,all international flights and those to Hong Kong and Macao were all moved to Pudong Airport. Besi...At 8:30 on October 27, the first international flight from Shanghai to Singapore MU576 took off at Pudong Airport. Thus,all international flights and those to Hong Kong and Macao were all moved to Pudong Airport. Besides internationalflights and Hong Kong and Macao flights, the eastward moving also cover some domestic flights, namely flights fromSanya, Haikou, Guangzhou, Shenzhen, Zhuhai, Qingdao, Yantai, Weihai, Weifang and so on in Northwest China, Mid-South China,and East China to Shanghai. After the eastward moving, the flight distribution at two airports in Shanghai changed greatly.展开更多
In 2009, the nuclear power plants under China National Nuclear Corporation (CNNC) continuously kept reliable operation. CNNC's seven nuclear power units accumulatively generated 38.25
Since CAS is charged with the key task of carrying out strategic, fundamental and forward-looking studies for this country, it is incumbent upon CAS scientists to take an active part in the National Program for the De...Since CAS is charged with the key task of carrying out strategic, fundamental and forward-looking studies for this country, it is incumbent upon CAS scientists to take an active part in the National Program for the Development of Western China. This is also an important part of the national Knowledge Innovation Program (KIP) spearheaded by CAS. Over the past two years, CAS has made a series of remarkable advances in Western China with regard to the development of research bases, exploration of crucial scientific problems, the training of talented people, and providing consultation services for decision makers.With the furtherance of the national drive to develop the country's western region, CAS will step up its efforts and increase its funding, to make more and greater contributions to the overall development of the region.展开更多
Earthquake-induced soil liquefaction poses significant risks to the stability of geotechnical structures worldwide.An understanding of the liquefaction triggering,and the post-failure large deformation behaviour is es...Earthquake-induced soil liquefaction poses significant risks to the stability of geotechnical structures worldwide.An understanding of the liquefaction triggering,and the post-failure large deformation behaviour is essential for designing resilient infrastructure.The present study develops a Smoothed Particle Hydrodynamics(SPH)framework for earthquake-induced liquefaction hazard assessment of geotechnical structures.The coupled flowdeformation behaviour of soils subjected to cyclic loading is described using the PM4Sand model implemented in a three-phase,single-layer SPH framework.A staggered discretisation scheme based on the stress particle SPH approach is adopted to minimise numerical inaccuracies caused by zero-energy modes and tensile instability.Further,non-reflecting boundary conditions for seismic analysis of semi-infinite soil domains using the SPH method are proposed.The numerical framework is employed for the analysis of cyclic direct simple shear test,seismic analysis of a level ground site,and liquefaction-induced failure of the Lower San Fernando Dam.Satisfactory agreement for liquefaction triggering and post-failure behaviour demonstrates that the SPH framework can be utilised to assess the effect of seismic loading on field-scale geotechnical structures.The present study also serves as the basis for future advancements of the SPH method for applications related to earthquake geotechnical engineering.展开更多
This study investigates the application of Learnable Memory Vision Transformers(LMViT)for detecting metal surface flaws,comparing their performance with traditional CNNs,specifically ResNet18 and ResNet50,as well as o...This study investigates the application of Learnable Memory Vision Transformers(LMViT)for detecting metal surface flaws,comparing their performance with traditional CNNs,specifically ResNet18 and ResNet50,as well as other transformer-based models including Token to Token ViT,ViT withoutmemory,and Parallel ViT.Leveraging awidely-used steel surface defect dataset,the research applies data augmentation and t-distributed stochastic neighbor embedding(t-SNE)to enhance feature extraction and understanding.These techniques mitigated overfitting,stabilized training,and improved generalization capabilities.The LMViT model achieved a test accuracy of 97.22%,significantly outperforming ResNet18(88.89%)and ResNet50(88.90%),aswell as the Token to TokenViT(88.46%),ViT without memory(87.18),and Parallel ViT(91.03%).Furthermore,LMViT exhibited superior training and validation performance,attaining a validation accuracy of 98.2%compared to 91.0%for ResNet 18,96.0%for ResNet50,and 89.12%,87.51%,and 91.21%for Token to Token ViT,ViT without memory,and Parallel ViT,respectively.The findings highlight the LMViT’s ability to capture long-range dependencies in images,an areawhere CNNs struggle due to their reliance on local receptive fields and hierarchical feature extraction.The additional transformer-based models also demonstrate improved performance in capturing complex features over CNNs,with LMViT excelling particularly at detecting subtle and complex defects,which is critical for maintaining product quality and operational efficiency in industrial applications.For instance,the LMViT model successfully identified fine scratches and minor surface irregularities that CNNs often misclassify.This study not only demonstrates LMViT’s potential for real-world defect detection but also underscores the promise of other transformer-based architectures like Token to Token ViT,ViT without memory,and Parallel ViT in industrial scenarios where complex spatial relationships are key.Future research may focus on enhancing LMViT’s computational efficiency for deployment in real-time quality control systems.展开更多
On 27th November 2018,Wuhan National Biosafety Laboratory of the Chinese Academy of Sciences(hereinafter referred to as“Wuhan P4 Laboratory”)was smoothly checked and accepted by the acceptance group organized by Chi...On 27th November 2018,Wuhan National Biosafety Laboratory of the Chinese Academy of Sciences(hereinafter referred to as“Wuhan P4 Laboratory”)was smoothly checked and accepted by the acceptance group organized by Chinese Academy of Sciences(CAS).More than 20 experts from CAS,National Natural Science Foundation of China,China National Accreditation Service for Conformity Assessment(CNAS).展开更多
Leiomyosarcoma of the gonadal vein is an exceedingly rare entity, representing a small subset of smooth muscle tumors that more commonly arise in the retroperitoneum, uterus, and blood vessels. To date, fewer than 10 ...Leiomyosarcoma of the gonadal vein is an exceedingly rare entity, representing a small subset of smooth muscle tumors that more commonly arise in the retroperitoneum, uterus, and blood vessels. To date, fewer than 10 cases of gonadal vein leiomyosarcoma have been reported in the literature, highlighting its rarity and the limited understanding of its clinical behavior. These tumors are often diagnosed incidentally or present with nonspecific symptoms, such as abdominal pain or a palpable mass, which can complicate early detection. The proximity of gonadal vein leiomyosarcomas to critical structures, such as the ureter, renal vessels, and surrounding organs, introduces unique diagnostic and surgical challenges. Previous reports have underscored the importance of advanced imaging techniques, including CT and MRI, in delineating the tumor’s anatomical relationships and guiding surgical planning. This case, involving a leiomyosarcoma closely associated with the patient’s left ureter, provides an opportunity to build on existing knowledge by addressing the clinical presentation, diagnostic approach, treatment pathway, and long-term follow-up strategies required for optimal management. By presenting this detailed review, we aim to contribute valuable insights into the diagnosis and management of this rare malignancy.展开更多
A discontinuous smoothed particle hydrodynamics(DSPH)method considering block contacts is originally developed to model the cracking,frictional slip and large deformation in rock masses,and is verified by theoretical,...A discontinuous smoothed particle hydrodynamics(DSPH)method considering block contacts is originally developed to model the cracking,frictional slip and large deformation in rock masses,and is verified by theoretical,numerical and/or experimental results.In the DSPH method,cracking is realized by breaking the virtual bonds via a pseudo-spring method based on Mohr–Coulomb failure criteria.The damaged particles are instantaneously replaced by discontinuous particles and the contact bond between the original and discontinuous particles is formed to simulate the frictional slip and separation/contraction between fracture surfaces based on the block contact algorithm.The motion of rock blocks and the contact force of discontinuous particles are determined following Newton's second law.The results indicate that the DSPH method precisely captures the cracking,contact formation and complete failure across six numerical benchmark tests.This single smoothed particle hydrodynamics(SPH)framework could significantly improve computational efficiency and is potentially applicable to broad multi-physical rock engineering problems of different scales.展开更多
Sodium-glucose cotransporter-2(SGLT-2)inhibitors represent a cutting-edge class of oral antidiabetic therapeutics that operate through selective inhibition of glucose reabsorption in proximal renal tubules,consequentl...Sodium-glucose cotransporter-2(SGLT-2)inhibitors represent a cutting-edge class of oral antidiabetic therapeutics that operate through selective inhibition of glucose reabsorption in proximal renal tubules,consequently augmenting urinary glucose excretion and attenuating blood glucose levels.Extensive clinical investigations have demonstrated their profound cardiovascular efficacy.Parallel basic science research has elucidated the mechanistic pathways through which diverse SGLT-2 inhibitors beneficially modulate pulmonary vascular cells and arterial remodeling.Specifically,these inhibitors exhibit promising potential in enhancing pulmonary vascular endothelial cell function,suppressing pulmonary smooth muscle cell proliferation and migration,reversing pulmonary arterial remodeling,and maintaining hemodynamic equilibrium.This comprehensive review synthesizes current literature to delineate the mechanisms by which SGLT-2 inhibitors enhance pulmonary vascular cell function and reverse pulmonary remodeling,thereby offering novel therapeutic perspectives for pulmonary vascular diseases.展开更多
Shanghang County,the mining base of Fujian,The RMB540 million Qinghai Xiyu 100,000-ton Lead Smelter Project is running smoothly,with equipment installation and debugging currently underway.It is expected to be put int...Shanghang County,the mining base of Fujian,The RMB540 million Qinghai Xiyu 100,000-ton Lead Smelter Project is running smoothly,with equipment installation and debugging currently underway.It is expected to be put intooperation at the end of this year.展开更多
The Shanghai Airport Group Company has set up a headquarters to command a project to refurbish Pudong and Hongqiao airports. Construction on Pudong Airport will be completed by the end of 2007, while that on Hongqiao ...The Shanghai Airport Group Company has set up a headquarters to command a project to refurbish Pudong and Hongqiao airports. Construction on Pudong Airport will be completed by the end of 2007, while that on Hongqiao Airport will be finished by the end of 2009.展开更多
Aluminum and copper are main raw materials in manufacturing of condenser & evaporator for refrigerator. In 2011, in order to sieve the initiatives, condenser & evaporator manufacturers began to muscle into ...Aluminum and copper are main raw materials in manufacturing of condenser & evaporator for refrigerator. In 2011, in order to sieve the initiatives, condenser & evaporator manufacturers began to muscle into the upstream fields of manufacturing of aluminum and copper refrigeration components. Replacement of copper by aluminum went smoothly in展开更多
文摘We construct two conical surfaces which take non-coplanar lines as generatrix and rational Bezier curve as ridge-line, and prove that the intersecting line of conical surface has similar properties to Bezier curve. Then, the smoothly blending of two cylinders whose axes are non-coplanar is realized by taking intersecting line of conical surface as axes.
文摘The facilities of 50 kl/a TDI unit at the North Jinghua Polyurethane Company in Liaoning province have been operating smoothly and safely for 158 h to deliver 500 tons of first-grade TDI products.The construction of this project has incarnated that the North Jinghua Polyurethane Company has completely mastered the TDI production technique.
文摘At 8:30 on October 27, the first international flight from Shanghai to Singapore MU576 took off at Pudong Airport. Thus,all international flights and those to Hong Kong and Macao were all moved to Pudong Airport. Besides internationalflights and Hong Kong and Macao flights, the eastward moving also cover some domestic flights, namely flights fromSanya, Haikou, Guangzhou, Shenzhen, Zhuhai, Qingdao, Yantai, Weihai, Weifang and so on in Northwest China, Mid-South China,and East China to Shanghai. After the eastward moving, the flight distribution at two airports in Shanghai changed greatly.
文摘In 2009, the nuclear power plants under China National Nuclear Corporation (CNNC) continuously kept reliable operation. CNNC's seven nuclear power units accumulatively generated 38.25
文摘Since CAS is charged with the key task of carrying out strategic, fundamental and forward-looking studies for this country, it is incumbent upon CAS scientists to take an active part in the National Program for the Development of Western China. This is also an important part of the national Knowledge Innovation Program (KIP) spearheaded by CAS. Over the past two years, CAS has made a series of remarkable advances in Western China with regard to the development of research bases, exploration of crucial scientific problems, the training of talented people, and providing consultation services for decision makers.With the furtherance of the national drive to develop the country's western region, CAS will step up its efforts and increase its funding, to make more and greater contributions to the overall development of the region.
基金The insights gained through these works,particularly from projects IITD/IRD/CW14168,CW14469,and CW14378,have significantly contributed to the development of the analysis presented in this study。
文摘Earthquake-induced soil liquefaction poses significant risks to the stability of geotechnical structures worldwide.An understanding of the liquefaction triggering,and the post-failure large deformation behaviour is essential for designing resilient infrastructure.The present study develops a Smoothed Particle Hydrodynamics(SPH)framework for earthquake-induced liquefaction hazard assessment of geotechnical structures.The coupled flowdeformation behaviour of soils subjected to cyclic loading is described using the PM4Sand model implemented in a three-phase,single-layer SPH framework.A staggered discretisation scheme based on the stress particle SPH approach is adopted to minimise numerical inaccuracies caused by zero-energy modes and tensile instability.Further,non-reflecting boundary conditions for seismic analysis of semi-infinite soil domains using the SPH method are proposed.The numerical framework is employed for the analysis of cyclic direct simple shear test,seismic analysis of a level ground site,and liquefaction-induced failure of the Lower San Fernando Dam.Satisfactory agreement for liquefaction triggering and post-failure behaviour demonstrates that the SPH framework can be utilised to assess the effect of seismic loading on field-scale geotechnical structures.The present study also serves as the basis for future advancements of the SPH method for applications related to earthquake geotechnical engineering.
基金funded by Woosong University Academic Research 2024.
文摘This study investigates the application of Learnable Memory Vision Transformers(LMViT)for detecting metal surface flaws,comparing their performance with traditional CNNs,specifically ResNet18 and ResNet50,as well as other transformer-based models including Token to Token ViT,ViT withoutmemory,and Parallel ViT.Leveraging awidely-used steel surface defect dataset,the research applies data augmentation and t-distributed stochastic neighbor embedding(t-SNE)to enhance feature extraction and understanding.These techniques mitigated overfitting,stabilized training,and improved generalization capabilities.The LMViT model achieved a test accuracy of 97.22%,significantly outperforming ResNet18(88.89%)and ResNet50(88.90%),aswell as the Token to TokenViT(88.46%),ViT without memory(87.18),and Parallel ViT(91.03%).Furthermore,LMViT exhibited superior training and validation performance,attaining a validation accuracy of 98.2%compared to 91.0%for ResNet 18,96.0%for ResNet50,and 89.12%,87.51%,and 91.21%for Token to Token ViT,ViT without memory,and Parallel ViT,respectively.The findings highlight the LMViT’s ability to capture long-range dependencies in images,an areawhere CNNs struggle due to their reliance on local receptive fields and hierarchical feature extraction.The additional transformer-based models also demonstrate improved performance in capturing complex features over CNNs,with LMViT excelling particularly at detecting subtle and complex defects,which is critical for maintaining product quality and operational efficiency in industrial applications.For instance,the LMViT model successfully identified fine scratches and minor surface irregularities that CNNs often misclassify.This study not only demonstrates LMViT’s potential for real-world defect detection but also underscores the promise of other transformer-based architectures like Token to Token ViT,ViT without memory,and Parallel ViT in industrial scenarios where complex spatial relationships are key.Future research may focus on enhancing LMViT’s computational efficiency for deployment in real-time quality control systems.
文摘On 27th November 2018,Wuhan National Biosafety Laboratory of the Chinese Academy of Sciences(hereinafter referred to as“Wuhan P4 Laboratory”)was smoothly checked and accepted by the acceptance group organized by Chinese Academy of Sciences(CAS).More than 20 experts from CAS,National Natural Science Foundation of China,China National Accreditation Service for Conformity Assessment(CNAS).
文摘Leiomyosarcoma of the gonadal vein is an exceedingly rare entity, representing a small subset of smooth muscle tumors that more commonly arise in the retroperitoneum, uterus, and blood vessels. To date, fewer than 10 cases of gonadal vein leiomyosarcoma have been reported in the literature, highlighting its rarity and the limited understanding of its clinical behavior. These tumors are often diagnosed incidentally or present with nonspecific symptoms, such as abdominal pain or a palpable mass, which can complicate early detection. The proximity of gonadal vein leiomyosarcomas to critical structures, such as the ureter, renal vessels, and surrounding organs, introduces unique diagnostic and surgical challenges. Previous reports have underscored the importance of advanced imaging techniques, including CT and MRI, in delineating the tumor’s anatomical relationships and guiding surgical planning. This case, involving a leiomyosarcoma closely associated with the patient’s left ureter, provides an opportunity to build on existing knowledge by addressing the clinical presentation, diagnostic approach, treatment pathway, and long-term follow-up strategies required for optimal management. By presenting this detailed review, we aim to contribute valuable insights into the diagnosis and management of this rare malignancy.
基金financial support from the National Key Research and Development Program of China(Grant No.2019YFC1509702)the Fundamental Research Funds for the Central Universities in Chinathe National Natural Science Foundation of China(Grant No.42377162).
文摘A discontinuous smoothed particle hydrodynamics(DSPH)method considering block contacts is originally developed to model the cracking,frictional slip and large deformation in rock masses,and is verified by theoretical,numerical and/or experimental results.In the DSPH method,cracking is realized by breaking the virtual bonds via a pseudo-spring method based on Mohr–Coulomb failure criteria.The damaged particles are instantaneously replaced by discontinuous particles and the contact bond between the original and discontinuous particles is formed to simulate the frictional slip and separation/contraction between fracture surfaces based on the block contact algorithm.The motion of rock blocks and the contact force of discontinuous particles are determined following Newton's second law.The results indicate that the DSPH method precisely captures the cracking,contact formation and complete failure across six numerical benchmark tests.This single smoothed particle hydrodynamics(SPH)framework could significantly improve computational efficiency and is potentially applicable to broad multi-physical rock engineering problems of different scales.
基金Supported by Science and Technology Department of Yunnan Province-Kunming Medical University,Kunming Medical Joint Special Project-Surface Project,No.202401AY070001-164Yunnan Provincial Clinical Research Center Cardiovascular Diseases-New Technology Research for Development Project for Diagnosis and Treatment Cardiovascular Diseases,No.202102AA310002the Key Technology Research and Device Development Project for Innovative Diagnosis and Treatment of Structural Heart Disease in the Southwest Plateau Region,No.202302AA310045.
文摘Sodium-glucose cotransporter-2(SGLT-2)inhibitors represent a cutting-edge class of oral antidiabetic therapeutics that operate through selective inhibition of glucose reabsorption in proximal renal tubules,consequently augmenting urinary glucose excretion and attenuating blood glucose levels.Extensive clinical investigations have demonstrated their profound cardiovascular efficacy.Parallel basic science research has elucidated the mechanistic pathways through which diverse SGLT-2 inhibitors beneficially modulate pulmonary vascular cells and arterial remodeling.Specifically,these inhibitors exhibit promising potential in enhancing pulmonary vascular endothelial cell function,suppressing pulmonary smooth muscle cell proliferation and migration,reversing pulmonary arterial remodeling,and maintaining hemodynamic equilibrium.This comprehensive review synthesizes current literature to delineate the mechanisms by which SGLT-2 inhibitors enhance pulmonary vascular cell function and reverse pulmonary remodeling,thereby offering novel therapeutic perspectives for pulmonary vascular diseases.
文摘Shanghang County,the mining base of Fujian,The RMB540 million Qinghai Xiyu 100,000-ton Lead Smelter Project is running smoothly,with equipment installation and debugging currently underway.It is expected to be put intooperation at the end of this year.
文摘The Shanghai Airport Group Company has set up a headquarters to command a project to refurbish Pudong and Hongqiao airports. Construction on Pudong Airport will be completed by the end of 2007, while that on Hongqiao Airport will be finished by the end of 2009.
文摘Aluminum and copper are main raw materials in manufacturing of condenser & evaporator for refrigerator. In 2011, in order to sieve the initiatives, condenser & evaporator manufacturers began to muscle into the upstream fields of manufacturing of aluminum and copper refrigeration components. Replacement of copper by aluminum went smoothly in
