Counter beam lighting was introduced as well as transverse symmetrical lighting and longitudinal symmetrical lighting.Simulation experiments were carried out by using DIAlux lighting software for the above three light...Counter beam lighting was introduced as well as transverse symmetrical lighting and longitudinal symmetrical lighting.Simulation experiments were carried out by using DIAlux lighting software for the above three lighting methods.The results show that counter beam lighting is more reasonable to be adopted in the tunnel entrance zone because its threshold increment of disability glare is greater.Counter beam lighting can improve the background luminance of the obstacles and lighting efficiency compared with transverse symmetrical lighting and longitudinal symmetrical lighting.Therefore,tunnel lighting energy-saving can be achieved by reducing the road luminance demands and luminaries power.Longitudinal symmetrical lighting is conducive to the large luminaries spacing in the tunnel internal zone;so power consumption can be reduced by decreasing the number of luminaries used.Tunnel walls are unsuitable to pave with smooth or bright material.Installation height of the luminaries has less effect on counter beam lighting.展开更多
True Boiling Point （TBP） distillation is one of the most common experimental techniques for determination of petroleum properties. The methods for performing TBP distillation experiments are described by ASTM D2892 ...True Boiling Point （TBP） distillation is one of the most common experimental techniques for determination of petroleum properties. The methods for performing TBP distillation experiments are described by ASTM D2892 and by ASTM D5236. However, these methods are established for petroleum fractions that reach temperatures up to 565 ~C. In this work, two petroleum residues were distilled in a falling film molecular distillation prototype and the data were used to obtain the extension of the TBP curve above a temperature of 565 ~C. It was possible to extend the TBP curve of both petroleum up to temperatures close to 700 ~C with consistency and continuity in comparison to the standard curve. In addition, an amount of raw material that was been treated as residue could be reused.展开更多
Objective Small cell carcinoma(SCC) is mostly found in the lungs. It is extremely rare in the gastric remnant. Here, we report a case and review the literature in order to improve the diagnosis and treatment of SCC of...Objective Small cell carcinoma(SCC) is mostly found in the lungs. It is extremely rare in the gastric remnant. Here, we report a case and review the literature in order to improve the diagnosis and treatment of SCC of the gastric remnant.Methods We report a case of SCC of the gastric remnant in a 71-year-old male Chinese patient who presented with epigastric pain, acid regurgitation, and belching and who underwent Billroth II gastrectomy more than 38 years ago.Results Physical examination showed no obvious abnormalities. Laboratory data were within normal limits, except for anemia. Pathology of the mass showed a protruded tumor measuring 5.0 × 5.0 × 2.5 cm at the anastomotic edge of the gastric remnant that infiltrated through the full wall of the stomach; this was confirmed by immunohistochemical staining for cytokeratin [CK(-)], leukocyte common antigen(LCA)(+), synaptophysin(+), CD56(+), and Ki-67(+ > 50%).Conclusion SCC of the gastric remnant is extremely rare, although the pathology, symptoms, diagnosis, treatment, and prognosis of SCC are similar to those of gastric SCC. Although the standard treatment of SCC of the gastric remnant remains unclear, effective surgical resection and subsequent multiagent chemotherapy should be performed for long-term survival. Our case shows the efficacy of tegafurgimeracil-oteracil-potassium capsule chemotherapy. Examination of a large series is required to determine the optimal treatment strategy for SCC of the gastric remnant.展开更多
Thermal residual stresses in polycrystalline diamond compact(PDC)cutter arising from the difference in thermal expansion between the polycrystalline diamond(PCD)and the supporting tungsten carbide substrate after sint...Thermal residual stresses in polycrystalline diamond compact(PDC)cutter arising from the difference in thermal expansion between the polycrystalline diamond(PCD)and the supporting tungsten carbide substrate after sintering at high pressure and high temperature were investigated using finite element simulation,laboratory tests and theoretical analysis.The obtained results show that although compressive residual stresses exist both in the interface of PCD table and in the most region of PCD table surface, the tensile residual stress,which is a fatal shortage to PDC,can also occur near the outer diameter area of PCD table,and the maximum value is 690 MPa.Distribution of tensile stress in the PCD table is given through experimental results,which is well consistent with the numerical results.This finding may be significant in designing new PDC cutters with lower residual stress and high cutting behavior.展开更多
Design and construction of engineering structures in geomaterials with block-in-matrix texture(referred as bimrock) such as conglomerates,breccias and agglomerates are challenging tasks for engineers.When dealing with...Design and construction of engineering structures in geomaterials with block-in-matrix texture(referred as bimrock) such as conglomerates,breccias and agglomerates are challenging tasks for engineers.When dealing with these materials in important structures such as open pits with high walls and pillars of deep underground mines,understanding the complete stress-strain behavior,including post-peak region,is a formidable yet crucial engineering practice.To study the post-peak behavior of bimrocks,artificial specimens were fabricated with a mixture of rock blocks and a cementing agent.All the experiments were conducted under uniaxial compression using a servo-control testing machine.The results show that the specimens with the highest block proportion(around 90% by mass) showed a small decrease in stress with strain increment in the post-peak region.The specimens with lower block proportions were characterized by an approximately steep fall in stress and following to residual stress.Based on the study,it is inferred that all the artificial specimens undergo post-failure deformation and the type of post behavior depends on rock block proportions.展开更多
In order to improve the effectiveness of traditional time domain identification methods in identifying damping ratios, a new damping ratio identification method based on pattern search is proposed by fluctuating the r...In order to improve the effectiveness of traditional time domain identification methods in identifying damping ratios, a new damping ratio identification method based on pattern search is proposed by fluctuating the reliable natural frequency obtained through traditional time domain identification methods by about 10% to build the boundary conditions, using all the initial identification results to establish the free decay response of the system, and using the pattern search method to correct the initial identification results with the residual sum of squares between the free decay response and the actually measured free-decay signal as the objective function. The proposed method deals with the actually measured free-decay signal with curve fitting and avoids enlarging the identified error caused by intermediate conversion, so it can effectively improve the identified accuracy of damping ratios. Simulations for a room-sized vibration isolation foundation show that the relative errors of analyzed three damping ratios are down to 1.05%, 1.51% and 3.7% by the proposed method from 8.42%, 5.85% and 8.5% by STD method when the noise level is 10%.展开更多
The work described in this paper is part of the European Project IBIOLAB, trying to find suitable metalworking fluids based on vegetable oils, such us High Oleic Sunflower Oil （HOSO）. In this paper, the performance ...The work described in this paper is part of the European Project IBIOLAB, trying to find suitable metalworking fluids based on vegetable oils, such us High Oleic Sunflower Oil （HOSO）. In this paper, the performance of the newly developed IBIOLAB water based formulations supplied by SOGELUB and LUBRIX is analyzed and compared with reference Mineral and Synthetic cutting fluids Innovative characterization tests at laboratory scale （3 ball abrasion tests, grinding simulation tests, Tapping torque test） in real grinding machines in combination with advanced characterization techniques （residual stress measurements monitored by RX to predict formation of cracks）, have been used for screening the performance of the emulsions.展开更多
基金Funded by Key Laboratory of Ministry of Education for Conveyance and Equipment,East China Jiaotong University(No. 09JD09)
文摘Counter beam lighting was introduced as well as transverse symmetrical lighting and longitudinal symmetrical lighting.Simulation experiments were carried out by using DIAlux lighting software for the above three lighting methods.The results show that counter beam lighting is more reasonable to be adopted in the tunnel entrance zone because its threshold increment of disability glare is greater.Counter beam lighting can improve the background luminance of the obstacles and lighting efficiency compared with transverse symmetrical lighting and longitudinal symmetrical lighting.Therefore,tunnel lighting energy-saving can be achieved by reducing the road luminance demands and luminaries power.Longitudinal symmetrical lighting is conducive to the large luminaries spacing in the tunnel internal zone;so power consumption can be reduced by decreasing the number of luminaries used.Tunnel walls are unsuitable to pave with smooth or bright material.Installation height of the luminaries has less effect on counter beam lighting.
文摘True Boiling Point （TBP） distillation is one of the most common experimental techniques for determination of petroleum properties. The methods for performing TBP distillation experiments are described by ASTM D2892 and by ASTM D5236. However, these methods are established for petroleum fractions that reach temperatures up to 565 ~C. In this work, two petroleum residues were distilled in a falling film molecular distillation prototype and the data were used to obtain the extension of the TBP curve above a temperature of 565 ~C. It was possible to extend the TBP curve of both petroleum up to temperatures close to 700 ~C with consistency and continuity in comparison to the standard curve. In addition, an amount of raw material that was been treated as residue could be reused.
文摘Objective Small cell carcinoma(SCC) is mostly found in the lungs. It is extremely rare in the gastric remnant. Here, we report a case and review the literature in order to improve the diagnosis and treatment of SCC of the gastric remnant.Methods We report a case of SCC of the gastric remnant in a 71-year-old male Chinese patient who presented with epigastric pain, acid regurgitation, and belching and who underwent Billroth II gastrectomy more than 38 years ago.Results Physical examination showed no obvious abnormalities. Laboratory data were within normal limits, except for anemia. Pathology of the mass showed a protruded tumor measuring 5.0 × 5.0 × 2.5 cm at the anastomotic edge of the gastric remnant that infiltrated through the full wall of the stomach; this was confirmed by immunohistochemical staining for cytokeratin [CK(-)], leukocyte common antigen(LCA)(+), synaptophysin(+), CD56(+), and Ki-67(+ > 50%).Conclusion SCC of the gastric remnant is extremely rare, although the pathology, symptoms, diagnosis, treatment, and prognosis of SCC are similar to those of gastric SCC. Although the standard treatment of SCC of the gastric remnant remains unclear, effective surgical resection and subsequent multiagent chemotherapy should be performed for long-term survival. Our case shows the efficacy of tegafurgimeracil-oteracil-potassium capsule chemotherapy. Examination of a large series is required to determine the optimal treatment strategy for SCC of the gastric remnant.
基金Project(20070533113)supported by the Doctoral Foundation of Ministry of Education of China
文摘Thermal residual stresses in polycrystalline diamond compact(PDC)cutter arising from the difference in thermal expansion between the polycrystalline diamond(PCD)and the supporting tungsten carbide substrate after sintering at high pressure and high temperature were investigated using finite element simulation,laboratory tests and theoretical analysis.The obtained results show that although compressive residual stresses exist both in the interface of PCD table and in the most region of PCD table surface, the tensile residual stress,which is a fatal shortage to PDC,can also occur near the outer diameter area of PCD table,and the maximum value is 690 MPa.Distribution of tensile stress in the PCD table is given through experimental results,which is well consistent with the numerical results.This finding may be significant in designing new PDC cutters with lower residual stress and high cutting behavior.
文摘Design and construction of engineering structures in geomaterials with block-in-matrix texture(referred as bimrock) such as conglomerates,breccias and agglomerates are challenging tasks for engineers.When dealing with these materials in important structures such as open pits with high walls and pillars of deep underground mines,understanding the complete stress-strain behavior,including post-peak region,is a formidable yet crucial engineering practice.To study the post-peak behavior of bimrocks,artificial specimens were fabricated with a mixture of rock blocks and a cementing agent.All the experiments were conducted under uniaxial compression using a servo-control testing machine.The results show that the specimens with the highest block proportion(around 90% by mass) showed a small decrease in stress with strain increment in the post-peak region.The specimens with lower block proportions were characterized by an approximately steep fall in stress and following to residual stress.Based on the study,it is inferred that all the artificial specimens undergo post-failure deformation and the type of post behavior depends on rock block proportions.
基金Sponsored by the National Natural Science Foundation of China (Grant No.50675052)
文摘In order to improve the effectiveness of traditional time domain identification methods in identifying damping ratios, a new damping ratio identification method based on pattern search is proposed by fluctuating the reliable natural frequency obtained through traditional time domain identification methods by about 10% to build the boundary conditions, using all the initial identification results to establish the free decay response of the system, and using the pattern search method to correct the initial identification results with the residual sum of squares between the free decay response and the actually measured free-decay signal as the objective function. The proposed method deals with the actually measured free-decay signal with curve fitting and avoids enlarging the identified error caused by intermediate conversion, so it can effectively improve the identified accuracy of damping ratios. Simulations for a room-sized vibration isolation foundation show that the relative errors of analyzed three damping ratios are down to 1.05%, 1.51% and 3.7% by the proposed method from 8.42%, 5.85% and 8.5% by STD method when the noise level is 10%.
文摘The work described in this paper is part of the European Project IBIOLAB, trying to find suitable metalworking fluids based on vegetable oils, such us High Oleic Sunflower Oil （HOSO）. In this paper, the performance of the newly developed IBIOLAB water based formulations supplied by SOGELUB and LUBRIX is analyzed and compared with reference Mineral and Synthetic cutting fluids Innovative characterization tests at laboratory scale （3 ball abrasion tests, grinding simulation tests, Tapping torque test） in real grinding machines in combination with advanced characterization techniques （residual stress measurements monitored by RX to predict formation of cracks）, have been used for screening the performance of the emulsions.
