Abstract As grid technology is expanding from scientific computing to business applications, service oriented grid computing is aimed at providing reliable services for users and hiding complexity of service processes...Abstract As grid technology is expanding from scientific computing to business applications, service oriented grid computing is aimed at providing reliable services for users and hiding complexity of service processes from them. The grid services for coordinating long-lived transactions that occur in business applications play an important role in reliable grid applications. In this paper, the grid transaction service （GridTS） is proposed for dealing with long-lived business transactions. We present a compensation-based long-lived transaction coordination algorithm that enables users to select results from committed sub-transactions. Unlike other long-lived transaction models that require application programmers to develop corresponding compensating transactions, GridTS can automatically generate compensating transactions on execution of a long-lived grid transaction. The simulation result has demonstrated the feasibility of GridTS and effectiveness of the corresponding algorithm.展开更多
Using daily maximum temperature(Tmax)data from 516 observation stations in eastern China from 1981 to 2020,this study employed a relative threshold method to define short-and long-lived heat waves(HWs)by considering r...Using daily maximum temperature(Tmax)data from 516 observation stations in eastern China from 1981 to 2020,this study employed a relative threshold method to define short-and long-lived heat waves(HWs)by considering regional climate differences to investigate the spatial characteristics and evolution of large-scale circulation during summer HWs.The results demonstrated spatial disparities in the frequency distribution of HWs of different durations and differences in the magnitude of duration and intensity between short-and long-lived HWs.Empirical orthogonal function analysis revealed three dominant spatial modes for both short-and long-lived HWs.The first mode showed that short-lived HWs occur prominently in both northern and southern regions,whereas long-lived HWs mainly occur in the northern region.The second mode was characterized by a meridional dipole pattern in both cases.The third mode exhibited a quadrupole pattern for short-lived HWs and a tripole pattern for long-lived HWs.Differences in the center locations of anomalies in the 500-hPa geopotential height and 850-hPa wind fields significantly influenced the temperature and precipitation anomaly distribution of typical HWs by affecting the warm column in the lower troposphere,cloud distribution,and moisture transport.Moreover,the atmospheric circulation evolution processes of typical HWs associated with the different modes of long-and short-lived HWs were linked to distinct teleconnection patterns.During the three modes of long-lived(short-lived)HWs,there was stronger(weaker)wave flux activity with multiple(single)propagation paths.Stronger westward Atlantic wave train activity at 300 hPa triggered the synergistic action of meridional and zonal wave fluxes,favoring the strengthening and maintenance of positive anomalies in geopotential height of 500 hPa.This may have contributed to the formation of long-lived HWs.These findings provide valuable insights to enhance our understanding and prediction of summer HWs.展开更多
The transmutation of long-lived fission products through spallation induced by light nuclides was investi-gated for the purpose of determining the feasibility of this approach for long-lived fission products,in both e...The transmutation of long-lived fission products through spallation induced by light nuclides was investi-gated for the purpose of determining the feasibility of this approach for long-lived fission products,in both economic and environmental terms.The cross-section data were obtained from the TALYS Evaluated Nuclear Data Library(TENDL).A thick target model was used to study the consumption of the target isotopes in the transmutation process.The transmutation yield was calculated using the highest beam intensity available with the China initiative accelerator-driven system.It was found that the light nuclide-induced spallation reaction can significantly reduce the radio toxicity of the investigated long-lived fission products.Using the transmutation target made of elemental LLFP and the proton beam with an intensity of 5 mA,the consumption of 90 Sr,93 Zr,107 Pd,or 137 Cs can reach approximately 500 g per year.展开更多
High energy density lithium(Li)metal batteries have attracted great attention,but they are faced with challenges of cycling instability and safety hazards.Due to high activity and drastic volume changes of metallic Li...High energy density lithium(Li)metal batteries have attracted great attention,but they are faced with challenges of cycling instability and safety hazards.Due to high activity and drastic volume changes of metallic Li,potential dendritic risks cannot be fully eliminated.Therefore,suppressing already existing Li dendrites must be evaluated.In addition,Li-active solids alloying with Li always face mechanical instability and fractures with cycling.Herein,we present touch ablation of dendrites by liquid metal,namely forming a defense layer on the electrode to directly react with the dendrites.Embrittlement,supercooling,and other liquid characteristics make the liquid gallium(Ga)exhibit continuous and reversible reactions with Li.The unique layout with a hierarchical porous structure inhibits upward growth of the dendrites.The protected Li||Li cells achieve stable cyclic performance even at 10 mA cm^(–2)and a large capacity of 5 mA h cm^(-2).展开更多
The cross sections of long-lived radionuclides of importance in fusionreactor technology are measured by activation method for <sup>137</sup>Ba（n,p）<sup>137</sup>Cs,<sup>182</sup>...The cross sections of long-lived radionuclides of importance in fusionreactor technology are measured by activation method for <sup>137</sup>Ba（n,p）<sup>137</sup>Cs,<sup>182</sup>W（n,n’x）<sup>178</sup>Hf<sup>m2</sup> and <sup>193</sup>Ir（n,2n）<sup>192</sup>Ir<sup>m2</sup> reactions at 14 MeV.The neutron fluencesare determined by the cross sections of <sup>93</sup>Nb（n,2n）<sup>92</sup>Nb<sup>m</sup>,<sup>54</sup>Fe（n,x）<sup>51</sup>Cr and<sup>54</sup>Fe（n,p）<sup>54</sup>Mn reactions.The induced gamma ray activities of the irradiated Ba<sub>2</sub>O<sub>3</sub>,Wand Ir samples and their monitor foils are measured by a calibrated Ge（Li）detector oran anti-Compton gamma ray spectrometer.展开更多
The cross sections for the formation of long-lived products <sup>108</sup>Ag<sup>m</sup>（6<sup>+</sup>,433a）,<sup>150</sup>Eu<sup>m</sup>（5<sup>-<...The cross sections for the formation of long-lived products <sup>108</sup>Ag<sup>m</sup>（6<sup>+</sup>,433a）,<sup>150</sup>Eu<sup>m</sup>（5<sup>-</sup>,36.9a）,<sup>158</sup>Tb（3<sup>-</sup>,180a）and <sup>178</sup>Hf<sup>m2</sup>（16<sup>+</sup>,31a）are measured in the（n,2n）reaction on the elementsof <sup>109</sup>Ag,<sup>151</sup>Eu,<sup>159</sup>Tb and <sup>79</sup>Hf at neutron energies of 9.5 MeV and 0.9 MeV,respectively.The neu-tron fluence is obtained through the <sup>197</sup>Au（n,2n）<sup>196</sup>Au reaction.The D（d,n）<sup>3</sup>He reaction is used as neu-tron source at the tandem accelerator.The present results are compared with the averaged values of theo-retical cross sections and the experimental data.展开更多
We initiate the study of exotic Higgs decays to long-lived particles(LLPs) at proposed future lepton colliders, focusing on scenarios with displaced hadronic final states. Our analysis entails a realistic tracker-base...We initiate the study of exotic Higgs decays to long-lived particles(LLPs) at proposed future lepton colliders, focusing on scenarios with displaced hadronic final states. Our analysis entails a realistic tracker-based search strategy involving the reconstruction of displaced secondary vertices and the imposition of selection cuts appropriate for eliminating the largest irreducible backgrounds. The projected sensitivity is broadly competitive with that of the LHC and potentially superior at lower LLP masses. In addition to forecasting branching ratio limits, which may be freely interpreted in a variety of model frameworks, we interpret our results in the parameter space of a Higgs portal Hidden Valley and various incarnations of neutral naturalness, illustrating the complementarity between direct searches for LLPs and precision Higgs coupling measurements at future lepton colliders.展开更多
For the Na + I2 collision system, theoretical study is performed on the QCISD(T) level by using ab initio method. The ab initio potential energy surfaces are got and on them the long-lived complexes are found and opti...For the Na + I2 collision system, theoretical study is performed on the QCISD(T) level by using ab initio method. The ab initio potential energy surfaces are got and on them the long-lived complexes are found and optimized. These results verify the crossed molecule beam experimental phenomenon and the detailed geometry structures are given for the first time. The role of the complexes in the reaction path is also described in detail.展开更多
The B3LYP/6-31G^＊ level of theory was used for the optimization of nonclassical platinum drugs with planar aromatic heterocycle ligands in addition to their monoaqua species, diaqua species and monofunctional adducts...The B3LYP/6-31G^＊ level of theory was used for the optimization of nonclassical platinum drugs with planar aromatic heterocycle ligands in addition to their monoaqua species, diaqua species and monofunctional adducts. Single point calculations were performed on optimized geometries using the MP2/6-31G^＊＊ method, and the Lanl2dz pseudo potential for the Pt atom remained constant in all calculations. It can be easily seen that the trans effect can influence both geometrical structures and bond dissociating energies （BDEs）. On the basis of our calculation, we get that the long-lived monofunctional adducts with chloride ligand may be in existence, because they possessed higher stability energies, easily dissociated chloride compared with the monoaqua species dissociating chloride and that replacement of the first chloride by bases became exothermic in solution. Our calculated results also demonstrate that the strongest H-bonds appear in the complexes of q-wG and t-wG using different methods. In comparison with adenine complexes, the corresponding guanine complexes possess larger interaction energies as well as higher stability energies either corrected by basis set superposition error （bsse） of Boys-Bernardi counterpoise method or uncorrected both in gas phase and in solution with one exception that the stability energy of q-CIA complex in solution is larger than that of q,CIG complex. Finally, the nature of bond was analyzed in terms of partial charges distribution based on NBO population.展开更多
The spallation cross-section data for the long-lived fission products (LLFPs) are scarce but required for the design of accelerator driven systems. In this paper, the isospin dependent quantum molecular dynamics model...The spallation cross-section data for the long-lived fission products (LLFPs) are scarce but required for the design of accelerator driven systems. In this paper, the isospin dependent quantum molecular dynamics model and the statistical code GEMINI are applied to simulate deuteron-induced spallation in the energy region of GeV/nucleon. By comparing the calculations with the experimental data, the applicability of the model is verified. The model is then applied to simulate the spallation of 90Sr, 93Zr, 107Pd, and 137Cs induced by deuterons at 200, 500 and 1000 MeV/nucleon. The cross-sections of isotopes, the cross-sections of long-lived nuclei, and the reaction energy are presented. Using the above observables, the feasibility of LLFP transmutation by spallation is discussed.展开更多
The cross section for <sup>108</sup>Cd（n,p）<sup>108</sup>Ag<sup>m</sup> reaction is measured by the activationmethod at an incident neutron energy of 14.6±0.2MeV.The result i...The cross section for <sup>108</sup>Cd（n,p）<sup>108</sup>Ag<sup>m</sup> reaction is measured by the activationmethod at an incident neutron energy of 14.6±0.2MeV.The result is 18.1±3.3mb.展开更多
A summary is given on the activation cross section measurements performed byChina Institute of Atomic Energy（CIAE）,Lanzhou University（LU）,Peking University（PU）and Sichuan University（SU）from 1989 to 1994 for ge...A summary is given on the activation cross section measurements performed byChina Institute of Atomic Energy（CIAE）,Lanzhou University（LU）,Peking University（PU）and Sichuan University（SU）from 1989 to 1994 for generation of long-lived radionuclides of im-portance in fusion reactor technology.The cross sections are measured for the reactions <sup>109</sup>Ag（n,2n）<sup>108</sup>Ag<sup>m</sup>,<sup>151</sup>Eu（n,2n）<sup>150</sup>Eu<sup>m</sup>,<sup>153</sup>Eu（n,2n）<sup>152</sup>Eu<sup>8</sup>,<sup>159</sup>Tb（n,2n）<sup>158</sup>Tb,<sup>179</sup>Hf（n,2n ）<sup>178</sup>Hf<sup>m2</sup>,<sup>182</sup>W（n,n′α）<sup>178</sup>Hf<sup>m2</sup>,<sup>187</sup>Re（n,2n）<sup>186</sup>Re<sup>m</sup> and <sup>193</sup>Ir（n,2n）<sup>192</sup>Ir<sup>m2</sup>at 14 MeV,<sup>109</sup>Ag（n,2n）<sup>108</sup>Ag<sup>m</sup>,<sup>151</sup>Eu（n,2n）<sup>150</sup>Eu<sup>m</sup>,<sup>159</sup>Tb（n,2n）<sup>158</sup>Tb and <sup>179</sup>Hf（n,2n）<sup>178</sup>Hf<sup>m2</sup>at 9.5 and 9.9 MeV,and<sup>98</sup>Mo（n,γ）<sup>199</sup>Mo（β<sup>-</sup>）→<sup>99</sup>Tc,<sup>165</sup>Ho（n.γ）<sup>166</sup>Ho<sup>m</sup> and <sup>151</sup>Eu（n,γ）<sup>152</sup>Eu<sup>8</sup> in the energy range of20～1100 keV.Some of them were calculated by systematic and HFTT code,which was basedon the compound nucleus evaporation and the preequilibrium exciton model.展开更多
Systematization for the maintenance of buildings enables their supporting system to be more practical than before. This study aims to make the maintenance and the long-term repairs for the buildings to be easier. In J...Systematization for the maintenance of buildings enables their supporting system to be more practical than before. This study aims to make the maintenance and the long-term repairs for the buildings to be easier. In Japan, 30-40-year-old buildings seem to have been planned and built with little thought about their future maintenances, which have made them very difficult to be repaired on a large scale. This is why effective management systems about dealing with the data should be strongly suggested. Since the Building Standard Law was amended on April 1, 2008, in Japan, the regular investigation and report for particular buildings are legally obligated every three years, thus a variety of useful data can be obtained through Kitakyushu City cases as well as former data personally obtained. With those data used usefully, systematization for the maintenance of the buildings will produce satisfactory results by building up a connection between those data and the long-term repair planning.展开更多
<strong>Introduction</strong>.<span><span><span style="font-family:;" "=""><span style="font-family:Verdana;"> The molecular biological mechanism ...<strong>Introduction</strong>.<span><span><span style="font-family:;" "=""><span style="font-family:Verdana;"> The molecular biological mechanism of the increased incidence of the various types of cancer in obesity or type 2 diabetes in rodents or humans has largely been resolved in recent years. By contrast, the molecular biological mechanism of the decreased, not increased, incidence of the various types of cancer in the homozygous long-lived Ames dwarf mice still remains unresolved. </span><b><span style="font-family:Verdana;">Objective.</span></b><span style="font-family:Verdana;"> The first objective of the present study was to investigate whether the decrease in the incidence of cancer in the homozygous long-lived Ames dwarf mice is due to the increase, not decrease, in the expression of p27Kip1, a cell cycle repressor protein. The second objective was to investigate whether the decrease in the incidence of cancer in the homozygous long-lived Ames dwarf mice is due to the decrease, not increase, in the levels of glucose or insulin. </span><b><span style="font-family:Verdana;">Methods.</span></b><span style="font-family:Verdana;"> To achieve these objectives, we first performed western immunoblot analysis of the hepatic expression of p27Kip1 protein. We then performed, using a human breast cancer cell line </span><i><span style="font-family:Verdana;">in</span></i> <i><span style="font-family:Verdana;">vitro</span></i><span style="font-family:Verdana;">, the luciferase reporter plasmid assay to determine whether the translation initiation activity of the p27Kip1 mRNA is increased when the concentrations of either glucose or insulin are decreased. </span><b><span style="font-family:Verdana;">Results and Conclusion. </span></b><span style="font-family:Verdana;">The results of the first objective indicated that the hepatic expression of p27Kip1 protein was up-regulated in the homozygous long-lived Ames dwarf mice as expected. We also found that the lower concentrations of glucose or insulin increased the transla展开更多
We observe the spectra of molybdenum for the first time since the first wall of our experimental advanced superconducting tokamak （EAST） was changed mainly to molybdenum tiles. A large amount of molybdenum accumulat...We observe the spectra of molybdenum for the first time since the first wall of our experimental advanced superconducting tokamak （EAST） was changed mainly to molybdenum tiles. A large amount of molybdenum accumulated in the central plasma where the long-lived m = 1 mode instability bursts is shown. Molybdenum is proved to be the main impurity species observed during the formation and lifetime of impurity-induced long-lived m= 1 mode. This may indicate that a close relationship exists between the high-Z impurity accumulation and the occurrence of long-lived m = 1 mode in EAST plasmas.展开更多
基金Paper This work is supported by the National Basic Research 973 Program of China （Grant No. 2002CB312002）, the National Natural Science Foundation of China （Grant Nos. 60473092 and 90612018）, Natural Science Foundation of Shanghai Municipality of China （Grant No. 05ZR14081）, and ShanghaiGrid from Science and Technology Commission of Shanghai Municipality （Grant No. 05DZ15005）.
文摘Abstract As grid technology is expanding from scientific computing to business applications, service oriented grid computing is aimed at providing reliable services for users and hiding complexity of service processes from them. The grid services for coordinating long-lived transactions that occur in business applications play an important role in reliable grid applications. In this paper, the grid transaction service （GridTS） is proposed for dealing with long-lived business transactions. We present a compensation-based long-lived transaction coordination algorithm that enables users to select results from committed sub-transactions. Unlike other long-lived transaction models that require application programmers to develop corresponding compensating transactions, GridTS can automatically generate compensating transactions on execution of a long-lived grid transaction. The simulation result has demonstrated the feasibility of GridTS and effectiveness of the corresponding algorithm.
基金Supported by the National Key Research and Development Program of China(2022YFF0801603).
文摘Using daily maximum temperature(Tmax)data from 516 observation stations in eastern China from 1981 to 2020,this study employed a relative threshold method to define short-and long-lived heat waves(HWs)by considering regional climate differences to investigate the spatial characteristics and evolution of large-scale circulation during summer HWs.The results demonstrated spatial disparities in the frequency distribution of HWs of different durations and differences in the magnitude of duration and intensity between short-and long-lived HWs.Empirical orthogonal function analysis revealed three dominant spatial modes for both short-and long-lived HWs.The first mode showed that short-lived HWs occur prominently in both northern and southern regions,whereas long-lived HWs mainly occur in the northern region.The second mode was characterized by a meridional dipole pattern in both cases.The third mode exhibited a quadrupole pattern for short-lived HWs and a tripole pattern for long-lived HWs.Differences in the center locations of anomalies in the 500-hPa geopotential height and 850-hPa wind fields significantly influenced the temperature and precipitation anomaly distribution of typical HWs by affecting the warm column in the lower troposphere,cloud distribution,and moisture transport.Moreover,the atmospheric circulation evolution processes of typical HWs associated with the different modes of long-and short-lived HWs were linked to distinct teleconnection patterns.During the three modes of long-lived(short-lived)HWs,there was stronger(weaker)wave flux activity with multiple(single)propagation paths.Stronger westward Atlantic wave train activity at 300 hPa triggered the synergistic action of meridional and zonal wave fluxes,favoring the strengthening and maintenance of positive anomalies in geopotential height of 500 hPa.This may have contributed to the formation of long-lived HWs.These findings provide valuable insights to enhance our understanding and prediction of summer HWs.
基金supported by the National Natural Science Foundation of China(No.11875328).
文摘The transmutation of long-lived fission products through spallation induced by light nuclides was investi-gated for the purpose of determining the feasibility of this approach for long-lived fission products,in both economic and environmental terms.The cross-section data were obtained from the TALYS Evaluated Nuclear Data Library(TENDL).A thick target model was used to study the consumption of the target isotopes in the transmutation process.The transmutation yield was calculated using the highest beam intensity available with the China initiative accelerator-driven system.It was found that the light nuclide-induced spallation reaction can significantly reduce the radio toxicity of the investigated long-lived fission products.Using the transmutation target made of elemental LLFP and the proton beam with an intensity of 5 mA,the consumption of 90 Sr,93 Zr,107 Pd,or 137 Cs can reach approximately 500 g per year.
基金support from the National Natural Science Foundation of China(grant no.21673161)the Sino-German Center for Research Promotion(grant no.1400).
文摘High energy density lithium(Li)metal batteries have attracted great attention,but they are faced with challenges of cycling instability and safety hazards.Due to high activity and drastic volume changes of metallic Li,potential dendritic risks cannot be fully eliminated.Therefore,suppressing already existing Li dendrites must be evaluated.In addition,Li-active solids alloying with Li always face mechanical instability and fractures with cycling.Herein,we present touch ablation of dendrites by liquid metal,namely forming a defense layer on the electrode to directly react with the dendrites.Embrittlement,supercooling,and other liquid characteristics make the liquid gallium(Ga)exhibit continuous and reversible reactions with Li.The unique layout with a hierarchical porous structure inhibits upward growth of the dendrites.The protected Li||Li cells achieve stable cyclic performance even at 10 mA cm^(–2)and a large capacity of 5 mA h cm^(-2).
基金IAEA project under Research Agreement No.5060/CF.
文摘The cross sections of long-lived radionuclides of importance in fusionreactor technology are measured by activation method for <sup>137</sup>Ba（n,p）<sup>137</sup>Cs,<sup>182</sup>W（n,n’x）<sup>178</sup>Hf<sup>m2</sup> and <sup>193</sup>Ir（n,2n）<sup>192</sup>Ir<sup>m2</sup> reactions at 14 MeV.The neutron fluencesare determined by the cross sections of <sup>93</sup>Nb（n,2n）<sup>92</sup>Nb<sup>m</sup>,<sup>54</sup>Fe（n,x）<sup>51</sup>Cr and<sup>54</sup>Fe（n,p）<sup>54</sup>Mn reactions.The induced gamma ray activities of the irradiated Ba<sub>2</sub>O<sub>3</sub>,Wand Ir samples and their monitor foils are measured by a calibrated Ge（Li）detector oran anti-Compton gamma ray spectrometer.
文摘The cross sections for the formation of long-lived products <sup>108</sup>Ag<sup>m</sup>（6<sup>+</sup>,433a）,<sup>150</sup>Eu<sup>m</sup>（5<sup>-</sup>,36.9a）,<sup>158</sup>Tb（3<sup>-</sup>,180a）and <sup>178</sup>Hf<sup>m2</sup>（16<sup>+</sup>,31a）are measured in the（n,2n）reaction on the elementsof <sup>109</sup>Ag,<sup>151</sup>Eu,<sup>159</sup>Tb and <sup>79</sup>Hf at neutron energies of 9.5 MeV and 0.9 MeV,respectively.The neu-tron fluence is obtained through the <sup>197</sup>Au（n,2n）<sup>196</sup>Au reaction.The D（d,n）<sup>3</sup>He reaction is used as neu-tron source at the tandem accelerator.The present results are compared with the averaged values of theo-retical cross sections and the experimental data.
基金Supported by the US Department of Energy under the Early Career Award DE-SC0014129 and the Cottrell Scholar Program through the Research Corporation for Science Advancement
文摘We initiate the study of exotic Higgs decays to long-lived particles(LLPs) at proposed future lepton colliders, focusing on scenarios with displaced hadronic final states. Our analysis entails a realistic tracker-based search strategy involving the reconstruction of displaced secondary vertices and the imposition of selection cuts appropriate for eliminating the largest irreducible backgrounds. The projected sensitivity is broadly competitive with that of the LHC and potentially superior at lower LLP masses. In addition to forecasting branching ratio limits, which may be freely interpreted in a variety of model frameworks, we interpret our results in the parameter space of a Higgs portal Hidden Valley and various incarnations of neutral naturalness, illustrating the complementarity between direct searches for LLPs and precision Higgs coupling measurements at future lepton colliders.
文摘For the Na + I2 collision system, theoretical study is performed on the QCISD(T) level by using ab initio method. The ab initio potential energy surfaces are got and on them the long-lived complexes are found and optimized. These results verify the crossed molecule beam experimental phenomenon and the detailed geometry structures are given for the first time. The role of the complexes in the reaction path is also described in detail.
基金This work was supported by the Science Foundation of Jinan University (639)
文摘The B3LYP/6-31G^＊ level of theory was used for the optimization of nonclassical platinum drugs with planar aromatic heterocycle ligands in addition to their monoaqua species, diaqua species and monofunctional adducts. Single point calculations were performed on optimized geometries using the MP2/6-31G^＊＊ method, and the Lanl2dz pseudo potential for the Pt atom remained constant in all calculations. It can be easily seen that the trans effect can influence both geometrical structures and bond dissociating energies （BDEs）. On the basis of our calculation, we get that the long-lived monofunctional adducts with chloride ligand may be in existence, because they possessed higher stability energies, easily dissociated chloride compared with the monoaqua species dissociating chloride and that replacement of the first chloride by bases became exothermic in solution. Our calculated results also demonstrate that the strongest H-bonds appear in the complexes of q-wG and t-wG using different methods. In comparison with adenine complexes, the corresponding guanine complexes possess larger interaction energies as well as higher stability energies either corrected by basis set superposition error （bsse） of Boys-Bernardi counterpoise method or uncorrected both in gas phase and in solution with one exception that the stability energy of q-CIA complex in solution is larger than that of q,CIG complex. Finally, the nature of bond was analyzed in terms of partial charges distribution based on NBO population.
基金Supported by the National Natural Science Foundation of China(11875328)
文摘The spallation cross-section data for the long-lived fission products (LLFPs) are scarce but required for the design of accelerator driven systems. In this paper, the isospin dependent quantum molecular dynamics model and the statistical code GEMINI are applied to simulate deuteron-induced spallation in the energy region of GeV/nucleon. By comparing the calculations with the experimental data, the applicability of the model is verified. The model is then applied to simulate the spallation of 90Sr, 93Zr, 107Pd, and 137Cs induced by deuterons at 200, 500 and 1000 MeV/nucleon. The cross-sections of isotopes, the cross-sections of long-lived nuclei, and the reaction energy are presented. Using the above observables, the feasibility of LLFP transmutation by spallation is discussed.
文摘The cross section for <sup>108</sup>Cd（n,p）<sup>108</sup>Ag<sup>m</sup> reaction is measured by the activationmethod at an incident neutron energy of 14.6±0.2MeV.The result is 18.1±3.3mb.
基金The project cartied OHt under IAEA Research Agreement No 5060/CF
文摘A summary is given on the activation cross section measurements performed byChina Institute of Atomic Energy（CIAE）,Lanzhou University（LU）,Peking University（PU）and Sichuan University（SU）from 1989 to 1994 for generation of long-lived radionuclides of im-portance in fusion reactor technology.The cross sections are measured for the reactions <sup>109</sup>Ag（n,2n）<sup>108</sup>Ag<sup>m</sup>,<sup>151</sup>Eu（n,2n）<sup>150</sup>Eu<sup>m</sup>,<sup>153</sup>Eu（n,2n）<sup>152</sup>Eu<sup>8</sup>,<sup>159</sup>Tb（n,2n）<sup>158</sup>Tb,<sup>179</sup>Hf（n,2n ）<sup>178</sup>Hf<sup>m2</sup>,<sup>182</sup>W（n,n′α）<sup>178</sup>Hf<sup>m2</sup>,<sup>187</sup>Re（n,2n）<sup>186</sup>Re<sup>m</sup> and <sup>193</sup>Ir（n,2n）<sup>192</sup>Ir<sup>m2</sup>at 14 MeV,<sup>109</sup>Ag（n,2n）<sup>108</sup>Ag<sup>m</sup>,<sup>151</sup>Eu（n,2n）<sup>150</sup>Eu<sup>m</sup>,<sup>159</sup>Tb（n,2n）<sup>158</sup>Tb and <sup>179</sup>Hf（n,2n）<sup>178</sup>Hf<sup>m2</sup>at 9.5 and 9.9 MeV,and<sup>98</sup>Mo（n,γ）<sup>199</sup>Mo（β<sup>-</sup>）→<sup>99</sup>Tc,<sup>165</sup>Ho（n.γ）<sup>166</sup>Ho<sup>m</sup> and <sup>151</sup>Eu（n,γ）<sup>152</sup>Eu<sup>8</sup> in the energy range of20～1100 keV.Some of them were calculated by systematic and HFTT code,which was basedon the compound nucleus evaporation and the preequilibrium exciton model.
文摘Systematization for the maintenance of buildings enables their supporting system to be more practical than before. This study aims to make the maintenance and the long-term repairs for the buildings to be easier. In Japan, 30-40-year-old buildings seem to have been planned and built with little thought about their future maintenances, which have made them very difficult to be repaired on a large scale. This is why effective management systems about dealing with the data should be strongly suggested. Since the Building Standard Law was amended on April 1, 2008, in Japan, the regular investigation and report for particular buildings are legally obligated every three years, thus a variety of useful data can be obtained through Kitakyushu City cases as well as former data personally obtained. With those data used usefully, systematization for the maintenance of the buildings will produce satisfactory results by building up a connection between those data and the long-term repair planning.
文摘<strong>Introduction</strong>.<span><span><span style="font-family:;" "=""><span style="font-family:Verdana;"> The molecular biological mechanism of the increased incidence of the various types of cancer in obesity or type 2 diabetes in rodents or humans has largely been resolved in recent years. By contrast, the molecular biological mechanism of the decreased, not increased, incidence of the various types of cancer in the homozygous long-lived Ames dwarf mice still remains unresolved. </span><b><span style="font-family:Verdana;">Objective.</span></b><span style="font-family:Verdana;"> The first objective of the present study was to investigate whether the decrease in the incidence of cancer in the homozygous long-lived Ames dwarf mice is due to the increase, not decrease, in the expression of p27Kip1, a cell cycle repressor protein. The second objective was to investigate whether the decrease in the incidence of cancer in the homozygous long-lived Ames dwarf mice is due to the decrease, not increase, in the levels of glucose or insulin. </span><b><span style="font-family:Verdana;">Methods.</span></b><span style="font-family:Verdana;"> To achieve these objectives, we first performed western immunoblot analysis of the hepatic expression of p27Kip1 protein. We then performed, using a human breast cancer cell line </span><i><span style="font-family:Verdana;">in</span></i> <i><span style="font-family:Verdana;">vitro</span></i><span style="font-family:Verdana;">, the luciferase reporter plasmid assay to determine whether the translation initiation activity of the p27Kip1 mRNA is increased when the concentrations of either glucose or insulin are decreased. </span><b><span style="font-family:Verdana;">Results and Conclusion. </span></b><span style="font-family:Verdana;">The results of the first objective indicated that the hepatic expression of p27Kip1 protein was up-regulated in the homozygous long-lived Ames dwarf mice as expected. We also found that the lower concentrations of glucose or insulin increased the transla
基金Supported by the National Magnetic Confinement Fusion Science Program of China under Grant Nos 2013GB112004 and 2015GB103002the Natural Science Research Key Project of Education Department of Anhui Province under Grant No KJ2016A434+3 种基金the Doctoral Scientific Research Foundation of Anqing Normal University under Grant No 044-140001000024the National Natural Science Foundation of China under Grant Nos 11275231,11305212,11405212 and 11261140328the Innovative Program of Development Foundation of Hefei Center for Physical Science and Technology under Grant No 2014FXCX003the Hefei Science Center CAS Users with Potential Project under Grant No 2015HSC-UP007
文摘We observe the spectra of molybdenum for the first time since the first wall of our experimental advanced superconducting tokamak （EAST） was changed mainly to molybdenum tiles. A large amount of molybdenum accumulated in the central plasma where the long-lived m = 1 mode instability bursts is shown. Molybdenum is proved to be the main impurity species observed during the formation and lifetime of impurity-induced long-lived m= 1 mode. This may indicate that a close relationship exists between the high-Z impurity accumulation and the occurrence of long-lived m = 1 mode in EAST plasmas.
