Numerical modeling of the tilt casting process for TiAl alloys was investigated to achieve a tranquil mould filling and TiAl castings free of defects. Titanium alloys are very reactive in molten state, so they are wid...Numerical modeling of the tilt casting process for TiAl alloys was investigated to achieve a tranquil mould filling and TiAl castings free of defects. Titanium alloys are very reactive in molten state, so they are widely melted in cold crucible, e.g. the Induction Skull Melting (ISM) furnace. Then the crucible holding the molten metal together with the mould is rotated to transfer the metal into the mould--ISM+ tilt casting. This paper emphasizes the effect of crucial parameters on mould filling and solidification of the castings during tilt casting. All crucial parameters, such as rotation rate, rotation profile, venting, initial mould temperature, casting orientation, feeder design, change of radius in'T'junction and mould insulation have been discussed using numerical modeling data. Simulations were performed using a 3D CFD code PHYSICA implemented with front tracking, heat transfer algorithms and a turbulence model (which accounts for an advancing solid front).展开更多
Over recent years, Japanese right-wing conservatist forces have launched a media and diplomatic attack of shifting the blame of "hindering the development of Sino-Japanese relations" on to China. They said t...Over recent years, Japanese right-wing conservatist forces have launched a media and diplomatic attack of shifting the blame of "hindering the development of Sino-Japanese relations" on to China. They said that China was playing the history card, seizing Japan’s historical fault as a handle against Japan. Some public figures in China also advocate sheltering the issue of the perception of history in order to展开更多
Reporter: How to appraises the Chinese exhibition industry market? Jime Essink :The Chinese exhibition market will experience a fast growth in the coming years. This will mainly be the result of an increase of interna...Reporter: How to appraises the Chinese exhibition industry market? Jime Essink :The Chinese exhibition market will experience a fast growth in the coming years. This will mainly be the result of an increase of international visitors展开更多
In our conversation with Prof.CHEN Lingling on the"dark mat ter"in the genome,namely the non-coding RNAs,we got to know two classes of long non-coding RNAs(lncRNAs)in close association with Prader-Willi synd...In our conversation with Prof.CHEN Lingling on the"dark mat ter"in the genome,namely the non-coding RNAs,we got to know two classes of long non-coding RNAs(lncRNAs)in close association with Prader-Willi syndrome(PWS).Each with a snoRNA cap on its either end,they fall in the sno-lncRNA family,a group of lncRNAs identified by CHEN’s group in their earlier research.Here we are meeting another member of the family,SLERT,a rescuer展开更多
This paper focuses on the historical transition of human being's activities and the eco-environment in the upper reaches of Minjiang River. The history is divided into 4 periods, each with its own feature.During t...This paper focuses on the historical transition of human being's activities and the eco-environment in the upper reaches of Minjiang River. The history is divided into 4 periods, each with its own feature.During the period of nomad immigration, the top-line of the subalpine forest was forced downward by the expanding subalpine meadow. During the period of farming nationality immigration, the bottom-line of middle mountain forest had moved upward forced by the needs for land or timber of the increasing population in the valley basin. During the period of the early exploiting, the focus resource was the timber. The total output was limited, comparing with the later period, because of the bad accessibility.But it was large enough to impact the forest ecosystem of the deforesting area. The recent 50 years is the crucial period of economic development and eco-environment degradation. This paper points out that the impact of human being's activities for environment lies on 3 factors: 1) physical features control the location and tendency eco-environmental change;2) population and productivity control the scale and speed of eco-environmental change; 3) regional accessibility controls the time and location of eco-environmental change.展开更多
Facial expression recognition(FER)is still challenging due to the small interclass discrepancy in facial expression data.In view of the significance of facial crucial regions for FER,many existing studies utilize the ...Facial expression recognition(FER)is still challenging due to the small interclass discrepancy in facial expression data.In view of the significance of facial crucial regions for FER,many existing studies utilize the prior information from some annotated crucial points to improve the performance of FER.However,it is complicated and time-consuming to manually annotate facial crucial points,especially for vast wild expression images.Based on this,a local non-local joint network is proposed to adaptively enhance the facial crucial regions in feature learning of FER in this paper.In the proposed method,two parts are constructed based on facial local and non-local information,where an ensemble of multiple local networks is proposed to extract local features corresponding to multiple facial local regions and a non-local attention network is addressed to explore the significance of each local region.In particular,the attention weights obtained by the non-local network are fed into the local part to achieve interactive feedback between the facial global and local information.Interestingly,the non-local weights corresponding to local regions are gradually updated and higher weights are given to more crucial regions.Moreover,U-Net is employed to extract the integrated features of deep semantic information and low hierarchical detail information of expression images.Finally,experimental results illustrate that the proposed method achieves more competitive performance than several state-of-the-art methods on five benchmark datasets.展开更多
Apocytochrome c (Apocyt. c) is the precursor of cytochrome c. It is synthesized in the cytosol and posttranslationally imported into mitochondria. In order to determine the crucial se-quence in apocyt. c translocation...Apocytochrome c (Apocyt. c) is the precursor of cytochrome c. It is synthesized in the cytosol and posttranslationally imported into mitochondria. In order to determine the crucial se-quence in apocyt. c translocation, deleted mutant and chemically synthesized peptides with differ-ent length were used. Obtained results showed that sequence 68-88 of apocyt. c plays a critical role in its insertion into membrane and binding to mitochondria.展开更多
The 13th National People’s Congress(NPC),China’s national legislature,opened its second session on March 5 at the Great Hall of the People in Beijing.Premier Li Keqiang delivered the Report on the Work of the Govern...The 13th National People’s Congress(NPC),China’s national legislature,opened its second session on March 5 at the Great Hall of the People in Beijing.Premier Li Keqiang delivered the Report on the Work of the Government on behalf of the State Council to NPC deputies and members of the Chinese People’s Political Consultative Conference(CPPCC)National Committee.展开更多
Back in April, the United States lodged two complaints with the World Trade Organization against China, one of the charges being that the Chinese leadership had failed to con-tain the spread of rampant piracy and infr...Back in April, the United States lodged two complaints with the World Trade Organization against China, one of the charges being that the Chinese leadership had failed to con-tain the spread of rampant piracy and infringements on copy-right and展开更多
Beijing Olympic organizers are demonstrating their anti-doping commitment by conducting more tests than ever before Doping tainted the Athens Olympic Games in 2004. Of the nearly 3,700 tests on banned substances condu...Beijing Olympic organizers are demonstrating their anti-doping commitment by conducting more tests than ever before Doping tainted the Athens Olympic Games in 2004. Of the nearly 3,700 tests on banned substances conducted at those games, the num-展开更多
Although the world economy is showing signs of recovery,many developing countries are still dealing with economic difficulties brought on by the financial crisis.As a result,global poverty reduction is facing major ch...Although the world economy is showing signs of recovery,many developing countries are still dealing with economic difficulties brought on by the financial crisis.As a result,global poverty reduction is facing major challenges,and promoting the development of these countries has become a pressing issue,wrote Yang Jiemian,President of the Shanghai Institutes for International Studies,in a recent article in People’s Daily.Edited excerpts follow:展开更多
Hopes for the Japanese economy remain high despite the severe blow it has suffered The tragic impact of the massive March 11 earth-quake on the northeast coast of Japan has filled the newswires across the world.
Simons In the 29th Olympic Games,Amedcan swimmer Michael Phelps sought to navigate uncharted territory.He has widely known in the last Olympics and for his second straight Olympics,the 23-year-old Phelps won eight gol...Simons In the 29th Olympic Games,Amedcan swimmer Michael Phelps sought to navigate uncharted territory.He has widely known in the last Olympics and for his second straight Olympics,the 23-year-old Phelps won eight gold medals to surpass the record seven that fellow-American swimmer Mark Spitz won in 1972.The Olympic Games will be a worldwide game,and展开更多
The phytohormone gibberellin(GA) plays essential roles in plant growth and development. Here,we report that OsINO80, a conserved ATP-dependent chromatin-remodeling factor in rice(Oryza sativa), functions in both GA bi...The phytohormone gibberellin(GA) plays essential roles in plant growth and development. Here,we report that OsINO80, a conserved ATP-dependent chromatin-remodeling factor in rice(Oryza sativa), functions in both GA biosynthesis and diverse biological processes. OsINO80-knockdown mutants, derived from either T-DNA insertion or RNA interference, display typical GA-deficient phenotypes, including dwarfism, reduced cell length, late flowering, retarded seed germination and impaired reproductive development. Consistently, transcriptome analyses reveal that OsINO80 knockdown results in downregulation by more than two-fold of over 1,000 genes, including the GA biosynthesis genes CPS_1 and GA_3ox_2, and the dwarf phenotype of OsINO80-knockdown mutants can be rescued by the application of exogenous GA3. Chromatin immunoprecipitation(Ch IP) experiments show that OsINO80 directly binds to the chromatin of CPS1 and GA_3ox_2 loci. Biochemical assays establish that OsINO80 specially interacts with histone variant H_2A.Z and the H_2A.Z enrichments at CPS_1 and GA_3ox_2 are decreased in OsINO80-knockdown mutants. Thus, our study identified a rice chromatin-remodeling factor,OsINO80, and demonstrated that OsINO80 is involved in regulation of the GA biosynthesis pathway and plays critical functions for many aspects of rice plant growth and development.展开更多
基金financially supported by EU:IP project IMPRESS(Intermetallic Materials Processing in Relation to Earth and Space Solidif ication,No.NMP3-CT-2004-500635)
文摘Numerical modeling of the tilt casting process for TiAl alloys was investigated to achieve a tranquil mould filling and TiAl castings free of defects. Titanium alloys are very reactive in molten state, so they are widely melted in cold crucible, e.g. the Induction Skull Melting (ISM) furnace. Then the crucible holding the molten metal together with the mould is rotated to transfer the metal into the mould--ISM+ tilt casting. This paper emphasizes the effect of crucial parameters on mould filling and solidification of the castings during tilt casting. All crucial parameters, such as rotation rate, rotation profile, venting, initial mould temperature, casting orientation, feeder design, change of radius in'T'junction and mould insulation have been discussed using numerical modeling data. Simulations were performed using a 3D CFD code PHYSICA implemented with front tracking, heat transfer algorithms and a turbulence model (which accounts for an advancing solid front).
文摘Over recent years, Japanese right-wing conservatist forces have launched a media and diplomatic attack of shifting the blame of "hindering the development of Sino-Japanese relations" on to China. They said that China was playing the history card, seizing Japan’s historical fault as a handle against Japan. Some public figures in China also advocate sheltering the issue of the perception of history in order to
文摘Reporter: How to appraises the Chinese exhibition industry market? Jime Essink :The Chinese exhibition market will experience a fast growth in the coming years. This will mainly be the result of an increase of international visitors
文摘In our conversation with Prof.CHEN Lingling on the"dark mat ter"in the genome,namely the non-coding RNAs,we got to know two classes of long non-coding RNAs(lncRNAs)in close association with Prader-Willi syndrome(PWS).Each with a snoRNA cap on its either end,they fall in the sno-lncRNA family,a group of lncRNAs identified by CHEN’s group in their earlier research.Here we are meeting another member of the family,SLERT,a rescuer
基金Supported by the Knowledge Innovative program of Chinese Academy of Sciences(KSCX1-07-03)
文摘This paper focuses on the historical transition of human being's activities and the eco-environment in the upper reaches of Minjiang River. The history is divided into 4 periods, each with its own feature.During the period of nomad immigration, the top-line of the subalpine forest was forced downward by the expanding subalpine meadow. During the period of farming nationality immigration, the bottom-line of middle mountain forest had moved upward forced by the needs for land or timber of the increasing population in the valley basin. During the period of the early exploiting, the focus resource was the timber. The total output was limited, comparing with the later period, because of the bad accessibility.But it was large enough to impact the forest ecosystem of the deforesting area. The recent 50 years is the crucial period of economic development and eco-environment degradation. This paper points out that the impact of human being's activities for environment lies on 3 factors: 1) physical features control the location and tendency eco-environmental change;2) population and productivity control the scale and speed of eco-environmental change; 3) regional accessibility controls the time and location of eco-environmental change.
文摘Facial expression recognition(FER)is still challenging due to the small interclass discrepancy in facial expression data.In view of the significance of facial crucial regions for FER,many existing studies utilize the prior information from some annotated crucial points to improve the performance of FER.However,it is complicated and time-consuming to manually annotate facial crucial points,especially for vast wild expression images.Based on this,a local non-local joint network is proposed to adaptively enhance the facial crucial regions in feature learning of FER in this paper.In the proposed method,two parts are constructed based on facial local and non-local information,where an ensemble of multiple local networks is proposed to extract local features corresponding to multiple facial local regions and a non-local attention network is addressed to explore the significance of each local region.In particular,the attention weights obtained by the non-local network are fed into the local part to achieve interactive feedback between the facial global and local information.Interestingly,the non-local weights corresponding to local regions are gradually updated and higher weights are given to more crucial regions.Moreover,U-Net is employed to extract the integrated features of deep semantic information and low hierarchical detail information of expression images.Finally,experimental results illustrate that the proposed method achieves more competitive performance than several state-of-the-art methods on five benchmark datasets.
基金the National Natural Science Foundation of China (Grant No. 39730130) and the Chinese Academy of Sciences.
文摘Apocytochrome c (Apocyt. c) is the precursor of cytochrome c. It is synthesized in the cytosol and posttranslationally imported into mitochondria. In order to determine the crucial se-quence in apocyt. c translocation, deleted mutant and chemically synthesized peptides with differ-ent length were used. Obtained results showed that sequence 68-88 of apocyt. c plays a critical role in its insertion into membrane and binding to mitochondria.
文摘The 13th National People’s Congress(NPC),China’s national legislature,opened its second session on March 5 at the Great Hall of the People in Beijing.Premier Li Keqiang delivered the Report on the Work of the Government on behalf of the State Council to NPC deputies and members of the Chinese People’s Political Consultative Conference(CPPCC)National Committee.
文摘Back in April, the United States lodged two complaints with the World Trade Organization against China, one of the charges being that the Chinese leadership had failed to con-tain the spread of rampant piracy and infringements on copy-right and
文摘Beijing Olympic organizers are demonstrating their anti-doping commitment by conducting more tests than ever before Doping tainted the Athens Olympic Games in 2004. Of the nearly 3,700 tests on banned substances conducted at those games, the num-
文摘Although the world economy is showing signs of recovery,many developing countries are still dealing with economic difficulties brought on by the financial crisis.As a result,global poverty reduction is facing major challenges,and promoting the development of these countries has become a pressing issue,wrote Yang Jiemian,President of the Shanghai Institutes for International Studies,in a recent article in People’s Daily.Edited excerpts follow:
文摘Hopes for the Japanese economy remain high despite the severe blow it has suffered The tragic impact of the massive March 11 earth-quake on the northeast coast of Japan has filled the newswires across the world.
文摘Simons In the 29th Olympic Games,Amedcan swimmer Michael Phelps sought to navigate uncharted territory.He has widely known in the last Olympics and for his second straight Olympics,the 23-year-old Phelps won eight gold medals to surpass the record seven that fellow-American swimmer Mark Spitz won in 1972.The Olympic Games will be a worldwide game,and
基金supported by the National Basic Research Program of China (973 Program, Grants no.2012CB910500)the National Natural Science Foundation of China (31570315, 91519308, and 31371304)
文摘The phytohormone gibberellin(GA) plays essential roles in plant growth and development. Here,we report that OsINO80, a conserved ATP-dependent chromatin-remodeling factor in rice(Oryza sativa), functions in both GA biosynthesis and diverse biological processes. OsINO80-knockdown mutants, derived from either T-DNA insertion or RNA interference, display typical GA-deficient phenotypes, including dwarfism, reduced cell length, late flowering, retarded seed germination and impaired reproductive development. Consistently, transcriptome analyses reveal that OsINO80 knockdown results in downregulation by more than two-fold of over 1,000 genes, including the GA biosynthesis genes CPS_1 and GA_3ox_2, and the dwarf phenotype of OsINO80-knockdown mutants can be rescued by the application of exogenous GA3. Chromatin immunoprecipitation(Ch IP) experiments show that OsINO80 directly binds to the chromatin of CPS1 and GA_3ox_2 loci. Biochemical assays establish that OsINO80 specially interacts with histone variant H_2A.Z and the H_2A.Z enrichments at CPS_1 and GA_3ox_2 are decreased in OsINO80-knockdown mutants. Thus, our study identified a rice chromatin-remodeling factor,OsINO80, and demonstrated that OsINO80 is involved in regulation of the GA biosynthesis pathway and plays critical functions for many aspects of rice plant growth and development.
