This paper describes the RTSS simulation-based performance evaluation method during the upgrade of the HT-7 data processing system to a distributed environment. We present the main concepts and steps of the method. Qu...This paper describes the RTSS simulation-based performance evaluation method during the upgrade of the HT-7 data processing system to a distributed environment. We present the main concepts and steps of the method. Queueing modeling and steady-state operational analysis techniques are also used for analytic modeling. Both simulation and analysis studies on the HT-7 data processing system indicate that in comparison with conventional time-shared systems,a client/server system can significantly reduce the completion time of raw data display,real-time data processing and data transfer in the online system,raise the workload capacity and reduce the average waiting time of the off-line system.展开更多
多发性骨髓瘤(multiple myeloma,MM)是一种不可治愈的血液系统恶性肿瘤,尽管新型蛋白酶体抑制剂、免疫调节剂及CD38单抗等药物的应用显著延长了患者的生存时间,但复发耐药仍难以避免。细胞免疫治疗,特别是嵌合抗原受体(chimeric antigen...多发性骨髓瘤(multiple myeloma,MM)是一种不可治愈的血液系统恶性肿瘤,尽管新型蛋白酶体抑制剂、免疫调节剂及CD38单抗等药物的应用显著延长了患者的生存时间,但复发耐药仍难以避免。细胞免疫治疗,特别是嵌合抗原受体(chimeric antigen receptor,CAR)T细胞疗法的快速发展,极大程度的改变了复发/难治性(relapsed/refractory,R/R)MM患者的治疗现状。FDA目前已批准了2款靶向B细胞成熟抗原(B cell maturation antigen,BCMA)的CAR-T细胞产品,使其用于既往接受过4线及以上治疗的R/R MM患者。随着临床研究的不断深入,靶向GPRC5D(G protein-coupled receptor C class Group 5 member D,G蛋白偶联受体C类第5组成员D)的CAR-T细胞治疗也显示出其独特的优势。除了应用于难治复发的患者,多项临床试验支持CAR-T在MM中治疗线数的前移。本文就CAR-T细胞治疗在MM中开展的关键性临床研究展开综述,旨在为临床应用提供参考。展开更多
Polysystem Theory was developed in 1970s by Israeli scholar Itamar Even-Zohar,and was well known for its three circumstances.Children' literature,as a special branch of literature,attracts more and more research n...Polysystem Theory was developed in 1970s by Israeli scholar Itamar Even-Zohar,and was well known for its three circumstances.Children' literature,as a special branch of literature,attracts more and more research nowadays.This paper explores the process of translation of Children' s Literature in China under polysystem.展开更多
AIM To investigate the relationship between vitamin D and liver fibrosis in hepatitis C-monoinfected or hepatitis C virus(HCV)-human immunodeficiency virus(HIV) coinfected patients. METHODS Pertinent studies were loca...AIM To investigate the relationship between vitamin D and liver fibrosis in hepatitis C-monoinfected or hepatitis C virus(HCV)-human immunodeficiency virus(HIV) coinfected patients. METHODS Pertinent studies were located by a library literature search in PubM ed/Embase/Cochrane/Scopus/LILACS by two individual reviewers. Inclusion criteria:(1) studies with patients with HCV or co-infected HCV/HIV;(2) studies with patients ≥ 18 years old;(3) studies that evaluated liver fibrosis stage, only based on liver biopsy; and(4) studies that reported serum or plasma 25(OH)D levels. Studies that included pediatric patients, other etiologies of liver disease, or did not use liver biopsy for fibrosis evaluation, or studies with inadequate data were excluded. Estimated measures of association reported in the literature, as well as corresponding measures of uncertainty, were recorded and corresponding odds ratios with 95%CI were included in a meta-analysis. RESULTS The pooled data of this systematic review showed that 9 of the 12 studies correlated advanced liver disease defined as a Metavir value of F3/4 with 25(OH) D level insufficiency. The meta-analysis indicated a significant association across studies.CONCLUSION Low vitamin D status is common in chronic Hepatitis C patients and is associated with advanced liver fibrosis.展开更多
AIM To provide a clear understanding of viral hepatitis epidemiology and their clinical burdens in Somalia.METHODS A systematic review and meta-analysis was conducted as Preferred Reporting Items for Systematic Review...AIM To provide a clear understanding of viral hepatitis epidemiology and their clinical burdens in Somalia.METHODS A systematic review and meta-analysis was conducted as Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. A comprehensive literature search of published studies on viral hepatitis was performed from 1977-2016 in Pub Med, Google Scholar, Science Direct, World Health Organization African Index Medicus and the Africa Journals Online databases, as well as on the Ministry of Health website. We also captured unpublished articles that were not available on online systems.RESULTS Twenty-nine studies from Somalia and Somali immigrants(United Kingdom,United States,Italy,Libya)with a combined sample size for each type of viral hepatitis[hepatitis A virus(HAV):1564,hepatitis B virus(HBV):8756,hepatitis C virus(HCV):6257,hepatitis D virus(HDV):375 and hepatitis E virus(HEV):278]were analyzed.The overall pooled prevalence rate of HAV was 90.2%(95%CI:77.8%to 96%).The HAV prevalence among different age groups was as follows:<1 year old,61.54%(95%CI:40.14%to79.24%);1-10 years old,91.91%(95%CI:87.76%to94.73%);11-19 years old,96.31%(95%CI:92.84%to 98.14%);20-39 years old,91.3%(95%CI:83.07%to 95.73%);and>40 years old,86.96%(95%CI:75.68%to 93.47%).The overall pooled prevalence of HBV was 18.9%(95%CI:14%to 29%).The overall pooled prevalence among subgroups of HBV was20.5%(95%CI:5.1%to 55.4%)in pregnant women;5.7%(95%CI:2.7%to 11.5%)in children;39.2%(95%CI:33.4%to 45.4%)in patients with chronic liver disease,including hepatocellular carcinoma(HCC);7.7%(95%CI:4.2%to 13.6%),12.4%(95%CI:6.3%to 23.0%)and 11.8%(95%CI:5.3%to 24.5%)in age groups<20 years old,20-39 years old and>40years old,respectively.The HBV prevalence among risk groups was 20%(95%CI:7.19%to 44.64%)in female prostitutes,21.28%(95%CI:7.15%to48.69%)in hospitalized adults,5.56%(95%CI:0.99%to 25.62%)in hospitalized children,60%(95%CI:31.66%to 82.92%)in patients with acute hepatitis,33.55%(95%CI:14.44%to 60.16%)in patients with ancylostomiasis,12.34%(95%CI:7.24%to 20.26%)in patients with leprosy and 20.19%(95%CI:11.28%to33.49%)in schistosomiasis patients.The overall pooled prevalence of HCV was estimated as 4.84%(95%CI:3.02%to 7.67%).The prevalence rates among blood donors,risk groups,children and patients chronic liver disease(including HCC)was 0.87%(95%CI:0.33%to 2.30%),2.43%(95%CI:1.21%to 4.8%),1.37%(95%CI:0.76%to 2.46%)and 29.82%(95%CI:15.84%to 48.98%),respectively.The prevalence among genotypes of HCV was 21.9%(95%CI:15.36%to 30.23%)in genotype 1,0.87%(95%CI:0.12%to 5.9%)in genotype 2,25.21%(95%CI:18.23%to 33.77%)in genotype 3,46.24%(95%CI:37.48%to 55.25%)in genotype 4,2.52%(95%CI:0.82%to7.53%)in genotype 5,and 1.19%(95%CI:0.07%to16.38%)in genotype 6.The overall pooled prevalence of HDV was 28.99%(95%CI:16.38%to 45.96%).The HDV prevalence rate among patients with chronic liver disease,including HCC,was 43.77%(95%CI:35.09%to 52.84%).The overall pooled prevalence of HEV was46.86%(95%CI:5.31%to 93.28%).CONCLUSION Our study demonstrates a high prevalence of all forms of viral hepatitis in Somalia and it also indicates that chronic HBV was the commonest cause of chronic liver disease.This highlights needs for urgent public health interventions and strategic policy directions to controlling the burden of the disease.展开更多
Using the negative eigenvalue theory and the infinite order perturbation theory, a new method was developed to solve the eigenvectors of disordered systems. The result shows that eigenvectors change from the extended ...Using the negative eigenvalue theory and the infinite order perturbation theory, a new method was developed to solve the eigenvectors of disordered systems. The result shows that eigenvectors change from the extended state to the localized state with the increase of the site points and the disordered degree of the system. When electric field is exerted, the electrons transfer from one localized state to another one. The conductivity is induced by the electron transfer. The authors derive the formula of electron conductivity and find the electron hops between localized states whose energies are close to each other, whereas localized positions differ from each other greatly. At low temperature the disordered system has the character of the negative differential dependence of resistivity and temperature.展开更多
Based on the multiplicity results of Benci and Fortunato [4], we consider some elliptic systems with strongly indefinite quadratic part, and establish the existence of infinitely many nontrivial solutions in a suitabl...Based on the multiplicity results of Benci and Fortunato [4], we consider some elliptic systems with strongly indefinite quadratic part, and establish the existence of infinitely many nontrivial solutions in a suitable family of products of fractional Sobolev spaces.展开更多
BACKGROUND Systemic lupus erythematosus(SLE)is an autoimmune disease characterized by systemic involvement and multiple autoantibodies in the serum.Patients with protein C(PC)and protein S(PS)deficiency are prone to t...BACKGROUND Systemic lupus erythematosus(SLE)is an autoimmune disease characterized by systemic involvement and multiple autoantibodies in the serum.Patients with protein C(PC)and protein S(PS)deficiency are prone to thrombosis.In contrast,patients with primary hyperfibrino-lysis tend to bleed.CASE SUMMARY A 52-year-old female patient with bilateral pleural effusion was diagnosed with"tuberculous pleurisy"and treated with anti-tuberculosis drugs and prednisone.The coagulation-related laboratory results showed decreased fibrinogen,PC activity,PS activity,and antithrombinШactivity.The immune-related laboratory results showed positive antinuclear antibody,anti-Smith antibody,anticardiolipin antibody(ACL),anti-β2-glycoprotein I antibody(aβ2GPI)and direct Coomb’s test and decreased complement 3 and complement 4.Thoracoscopy was performed and bloody pleural fluid was drained.Pathology of the pleural biopsy showed lymphocytes,plasma cells,and a few eosinophils in adipose and fibrous connective tissue.Results of whole exome sequencing of blood showed no genetic mutations suggesting the presence of hereditary hematological diseases.The patient was finally diagnosed with SLE and primary hyperfibrinolysis,and was treated with prednisolone,hydroxychloroquine,and compound cyclophosphamide.CONCLUSION PC and PS deficiency in SLE might be related to ACL and aβ2GPI.SLE and primary hyperfibrinolysis can coexist in one patient,with both a risk of thrombosis and a risk of bleeding.展开更多
For the remote control of a neutral beam injection （NBI） system, a software NBIcsw is developed to work on the control server. It can meet the requirements of data transmission and operation-control between the NBI ...For the remote control of a neutral beam injection （NBI） system, a software NBIcsw is developed to work on the control server. It can meet the requirements of data transmission and operation-control between the NBI measurement and control layer （MCL） and the remote monitoring layer （RML）. The NBIcsw runs on a Linux system, developed with client/server （C/S） mode and multithreading technology. It is shown through application that the software is with good efficiency.展开更多
A fast and convenient C―S bond formation reaction was achieved catalyzed by CuI/L-proline in aqueous two-phase system providing a simple method for synthesis of aryl sulfides in good yields in short time.
The structure characteristics of hydrated calcium silicate synthesized by solution reaction method with the existing of water soluble polymer polyvinyl alcohol（PVA）are investigated.Using Na 2 SO 3 and Ca（NO 3 ） 2 ...The structure characteristics of hydrated calcium silicate synthesized by solution reaction method with the existing of water soluble polymer polyvinyl alcohol（PVA）are investigated.Using Na 2 SO 3 and Ca（NO 3 ） 2 as the main raw materials,in the condition of 2%（in weight）addition of PVA and the water to solid ratio of 20,hydrated calcium silicate samples（Ca/Si=1.0 and 1.5）were prepared with 60℃water bath.IR,BET,XRD and SEM methods were used to study the microstructure of the hydration products.The results showed that the addition of water soluble PVA did not alter obviously the amorphous structure characteristic of hydrated calcium silicate,but it had effects on the polymerization status of Si-O chain and the pore structure.The effects are somewhat obvious in the samples with the Ca/Si of 1.0.展开更多
The Weiquan Ag-polymetallic deposit is located on the southern margin of the Central Asian Orogenic Belt and in the western segment of the Aqishan-Yamansu arc belt in East Tianshan,northwestern China. Its orebodies, c...The Weiquan Ag-polymetallic deposit is located on the southern margin of the Central Asian Orogenic Belt and in the western segment of the Aqishan-Yamansu arc belt in East Tianshan,northwestern China. Its orebodies, controlled by faults, occur in the lower Carboniferous volcanosedimentary rocks of the Yamansu Formation as irregular veins and lenses. Four stages of mineralization have been recognized on the basis of mineral assemblages, ore fabrics, and crosscutting relationships among the ore veins. Stage I is the skarn stage(garnet + pyroxene), Stage Ⅱ is the retrograde alteration stage(epidote + chlorite + magnetite ± hematite 士 actinolite ± quartz),Stage Ⅲ is the sulfide stage(Ag and Bi minerals + pyrite + chalcopyrite + galena + sphalerite + quartz ± calcite ± tetrahedrite),and Stage IV is the carbonate stage(quartz + calcite ± pyrite). Skarnization,silicification, carbonatization,epidotization,chloritization, sericitization, and actinolitization are the principal types of hydrothermal alteration. LAICP-MS U-Pb dating yielded ages of 326.5±4.5 and 298.5±1.5 Ma for zircons from the tuff and diorite porphyry, respectively. Given that the tuff is wall rock and that the orebodies are cut by a late diorite porphyry dike, the ages of the tuff and the diorite porphyry provide lower and upper time limits on the age of ore formation. The δ13C values of the calcite samples range from-2.5‰ to 2.3‰, the δ18OH2 Oand δDVSMOWvalues of the sulfide stage(Stage Ⅲ) vary from 1.1‰ to 5.2‰ and-111.7‰ to-66.1‰, respectively,and the δ13C, δ18OH2 Oand δDV-SMOWvalues of calcite in one Stage IV sample are 1.5‰,-0.3‰, and-115.6‰, respectively. Carbon, hydrogen, and oxygen isotopic compositions indicate that the ore-forming fluids evolved gradually from magmatic to meteoric sources. The δ34SV-CDTvalues of the sulfides have a large range from-6.9‰ to 1.4‰, with an average of-2.2‰, indicating a magmatic source, possibly with sedimentary contributions. The206Pb/204Pb,207Pb/204Pb, and208Pb/204Pb ratios of the sulfides are 17.9848-18.2785,15.5188-15.6536, and 37.8125-38.4650, respectively, and one whole-rock sample at Weiquan yields206Pb/204Pb,207Pb/204Pb, and208Pb/204Pb ratios of 18.2060, 15.5674, and 38.0511,respectively. Lead isotopic systems suggest that the ore-forming materials of the Weiquan deposit were derived from a mixed source involving mantle and crustal components. Based on geological features, zircon U-Pb dating, and C-H-OS-Pb isotopic data, it can be concluded that the Weiquan polymetallic deposit is a skarn type that formed in a tectonic setting spanning a period from subduction to post-collision. The ore materials were sourced from magmatic ore-forming fluids that mixed with components derived from host rocks during their ascent, and a gradual mixing with meteoric water took place in the later stages.展开更多
文摘This paper describes the RTSS simulation-based performance evaluation method during the upgrade of the HT-7 data processing system to a distributed environment. We present the main concepts and steps of the method. Queueing modeling and steady-state operational analysis techniques are also used for analytic modeling. Both simulation and analysis studies on the HT-7 data processing system indicate that in comparison with conventional time-shared systems,a client/server system can significantly reduce the completion time of raw data display,real-time data processing and data transfer in the online system,raise the workload capacity and reduce the average waiting time of the off-line system.
文摘多发性骨髓瘤(multiple myeloma,MM)是一种不可治愈的血液系统恶性肿瘤,尽管新型蛋白酶体抑制剂、免疫调节剂及CD38单抗等药物的应用显著延长了患者的生存时间,但复发耐药仍难以避免。细胞免疫治疗,特别是嵌合抗原受体(chimeric antigen receptor,CAR)T细胞疗法的快速发展,极大程度的改变了复发/难治性(relapsed/refractory,R/R)MM患者的治疗现状。FDA目前已批准了2款靶向B细胞成熟抗原(B cell maturation antigen,BCMA)的CAR-T细胞产品,使其用于既往接受过4线及以上治疗的R/R MM患者。随着临床研究的不断深入,靶向GPRC5D(G protein-coupled receptor C class Group 5 member D,G蛋白偶联受体C类第5组成员D)的CAR-T细胞治疗也显示出其独特的优势。除了应用于难治复发的患者,多项临床试验支持CAR-T在MM中治疗线数的前移。本文就CAR-T细胞治疗在MM中开展的关键性临床研究展开综述,旨在为临床应用提供参考。
文摘Polysystem Theory was developed in 1970s by Israeli scholar Itamar Even-Zohar,and was well known for its three circumstances.Children' literature,as a special branch of literature,attracts more and more research nowadays.This paper explores the process of translation of Children' s Literature in China under polysystem.
文摘AIM To investigate the relationship between vitamin D and liver fibrosis in hepatitis C-monoinfected or hepatitis C virus(HCV)-human immunodeficiency virus(HIV) coinfected patients. METHODS Pertinent studies were located by a library literature search in PubM ed/Embase/Cochrane/Scopus/LILACS by two individual reviewers. Inclusion criteria:(1) studies with patients with HCV or co-infected HCV/HIV;(2) studies with patients ≥ 18 years old;(3) studies that evaluated liver fibrosis stage, only based on liver biopsy; and(4) studies that reported serum or plasma 25(OH)D levels. Studies that included pediatric patients, other etiologies of liver disease, or did not use liver biopsy for fibrosis evaluation, or studies with inadequate data were excluded. Estimated measures of association reported in the literature, as well as corresponding measures of uncertainty, were recorded and corresponding odds ratios with 95%CI were included in a meta-analysis. RESULTS The pooled data of this systematic review showed that 9 of the 12 studies correlated advanced liver disease defined as a Metavir value of F3/4 with 25(OH) D level insufficiency. The meta-analysis indicated a significant association across studies.CONCLUSION Low vitamin D status is common in chronic Hepatitis C patients and is associated with advanced liver fibrosis.
文摘AIM To provide a clear understanding of viral hepatitis epidemiology and their clinical burdens in Somalia.METHODS A systematic review and meta-analysis was conducted as Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. A comprehensive literature search of published studies on viral hepatitis was performed from 1977-2016 in Pub Med, Google Scholar, Science Direct, World Health Organization African Index Medicus and the Africa Journals Online databases, as well as on the Ministry of Health website. We also captured unpublished articles that were not available on online systems.RESULTS Twenty-nine studies from Somalia and Somali immigrants(United Kingdom,United States,Italy,Libya)with a combined sample size for each type of viral hepatitis[hepatitis A virus(HAV):1564,hepatitis B virus(HBV):8756,hepatitis C virus(HCV):6257,hepatitis D virus(HDV):375 and hepatitis E virus(HEV):278]were analyzed.The overall pooled prevalence rate of HAV was 90.2%(95%CI:77.8%to 96%).The HAV prevalence among different age groups was as follows:<1 year old,61.54%(95%CI:40.14%to79.24%);1-10 years old,91.91%(95%CI:87.76%to94.73%);11-19 years old,96.31%(95%CI:92.84%to 98.14%);20-39 years old,91.3%(95%CI:83.07%to 95.73%);and>40 years old,86.96%(95%CI:75.68%to 93.47%).The overall pooled prevalence of HBV was 18.9%(95%CI:14%to 29%).The overall pooled prevalence among subgroups of HBV was20.5%(95%CI:5.1%to 55.4%)in pregnant women;5.7%(95%CI:2.7%to 11.5%)in children;39.2%(95%CI:33.4%to 45.4%)in patients with chronic liver disease,including hepatocellular carcinoma(HCC);7.7%(95%CI:4.2%to 13.6%),12.4%(95%CI:6.3%to 23.0%)and 11.8%(95%CI:5.3%to 24.5%)in age groups<20 years old,20-39 years old and>40years old,respectively.The HBV prevalence among risk groups was 20%(95%CI:7.19%to 44.64%)in female prostitutes,21.28%(95%CI:7.15%to48.69%)in hospitalized adults,5.56%(95%CI:0.99%to 25.62%)in hospitalized children,60%(95%CI:31.66%to 82.92%)in patients with acute hepatitis,33.55%(95%CI:14.44%to 60.16%)in patients with ancylostomiasis,12.34%(95%CI:7.24%to 20.26%)in patients with leprosy and 20.19%(95%CI:11.28%to33.49%)in schistosomiasis patients.The overall pooled prevalence of HCV was estimated as 4.84%(95%CI:3.02%to 7.67%).The prevalence rates among blood donors,risk groups,children and patients chronic liver disease(including HCC)was 0.87%(95%CI:0.33%to 2.30%),2.43%(95%CI:1.21%to 4.8%),1.37%(95%CI:0.76%to 2.46%)and 29.82%(95%CI:15.84%to 48.98%),respectively.The prevalence among genotypes of HCV was 21.9%(95%CI:15.36%to 30.23%)in genotype 1,0.87%(95%CI:0.12%to 5.9%)in genotype 2,25.21%(95%CI:18.23%to 33.77%)in genotype 3,46.24%(95%CI:37.48%to 55.25%)in genotype 4,2.52%(95%CI:0.82%to7.53%)in genotype 5,and 1.19%(95%CI:0.07%to16.38%)in genotype 6.The overall pooled prevalence of HDV was 28.99%(95%CI:16.38%to 45.96%).The HDV prevalence rate among patients with chronic liver disease,including HCC,was 43.77%(95%CI:35.09%to 52.84%).The overall pooled prevalence of HEV was46.86%(95%CI:5.31%to 93.28%).CONCLUSION Our study demonstrates a high prevalence of all forms of viral hepatitis in Somalia and it also indicates that chronic HBV was the commonest cause of chronic liver disease.This highlights needs for urgent public health interventions and strategic policy directions to controlling the burden of the disease.
文摘Using the negative eigenvalue theory and the infinite order perturbation theory, a new method was developed to solve the eigenvectors of disordered systems. The result shows that eigenvectors change from the extended state to the localized state with the increase of the site points and the disordered degree of the system. When electric field is exerted, the electrons transfer from one localized state to another one. The conductivity is induced by the electron transfer. The authors derive the formula of electron conductivity and find the electron hops between localized states whose energies are close to each other, whereas localized positions differ from each other greatly. At low temperature the disordered system has the character of the negative differential dependence of resistivity and temperature.
文摘Based on the multiplicity results of Benci and Fortunato [4], we consider some elliptic systems with strongly indefinite quadratic part, and establish the existence of infinitely many nontrivial solutions in a suitable family of products of fractional Sobolev spaces.
文摘BACKGROUND Systemic lupus erythematosus(SLE)is an autoimmune disease characterized by systemic involvement and multiple autoantibodies in the serum.Patients with protein C(PC)and protein S(PS)deficiency are prone to thrombosis.In contrast,patients with primary hyperfibrino-lysis tend to bleed.CASE SUMMARY A 52-year-old female patient with bilateral pleural effusion was diagnosed with"tuberculous pleurisy"and treated with anti-tuberculosis drugs and prednisone.The coagulation-related laboratory results showed decreased fibrinogen,PC activity,PS activity,and antithrombinШactivity.The immune-related laboratory results showed positive antinuclear antibody,anti-Smith antibody,anticardiolipin antibody(ACL),anti-β2-glycoprotein I antibody(aβ2GPI)and direct Coomb’s test and decreased complement 3 and complement 4.Thoracoscopy was performed and bloody pleural fluid was drained.Pathology of the pleural biopsy showed lymphocytes,plasma cells,and a few eosinophils in adipose and fibrous connective tissue.Results of whole exome sequencing of blood showed no genetic mutations suggesting the presence of hereditary hematological diseases.The patient was finally diagnosed with SLE and primary hyperfibrinolysis,and was treated with prednisolone,hydroxychloroquine,and compound cyclophosphamide.CONCLUSION PC and PS deficiency in SLE might be related to ACL and aβ2GPI.SLE and primary hyperfibrinolysis can coexist in one patient,with both a risk of thrombosis and a risk of bleeding.
基金supported by National Natural Science Foundation of China (No. 10875146)
文摘For the remote control of a neutral beam injection （NBI） system, a software NBIcsw is developed to work on the control server. It can meet the requirements of data transmission and operation-control between the NBI measurement and control layer （MCL） and the remote monitoring layer （RML）. The NBIcsw runs on a Linux system, developed with client/server （C/S） mode and multithreading technology. It is shown through application that the software is with good efficiency.
基金Supported by the Zhejiang Province Natural Science Foundation, China(No.407240)
文摘A fast and convenient C―S bond formation reaction was achieved catalyzed by CuI/L-proline in aqueous two-phase system providing a simple method for synthesis of aryl sulfides in good yields in short time.
基金Funded by National Basic Research Program of China(973 Program) (No.2009CB623201)National Natural Science Foundation of China (No.51072150)
文摘The structure characteristics of hydrated calcium silicate synthesized by solution reaction method with the existing of water soluble polymer polyvinyl alcohol（PVA）are investigated.Using Na 2 SO 3 and Ca（NO 3 ） 2 as the main raw materials,in the condition of 2%（in weight）addition of PVA and the water to solid ratio of 20,hydrated calcium silicate samples（Ca/Si=1.0 and 1.5）were prepared with 60℃water bath.IR,BET,XRD and SEM methods were used to study the microstructure of the hydration products.The results showed that the addition of water soluble PVA did not alter obviously the amorphous structure characteristic of hydrated calcium silicate,but it had effects on the polymerization status of Si-O chain and the pore structure.The effects are somewhat obvious in the samples with the Ca/Si of 1.0.
基金funded by the China Geological Survey (No. 1212011220731)
文摘The Weiquan Ag-polymetallic deposit is located on the southern margin of the Central Asian Orogenic Belt and in the western segment of the Aqishan-Yamansu arc belt in East Tianshan,northwestern China. Its orebodies, controlled by faults, occur in the lower Carboniferous volcanosedimentary rocks of the Yamansu Formation as irregular veins and lenses. Four stages of mineralization have been recognized on the basis of mineral assemblages, ore fabrics, and crosscutting relationships among the ore veins. Stage I is the skarn stage(garnet + pyroxene), Stage Ⅱ is the retrograde alteration stage(epidote + chlorite + magnetite ± hematite 士 actinolite ± quartz),Stage Ⅲ is the sulfide stage(Ag and Bi minerals + pyrite + chalcopyrite + galena + sphalerite + quartz ± calcite ± tetrahedrite),and Stage IV is the carbonate stage(quartz + calcite ± pyrite). Skarnization,silicification, carbonatization,epidotization,chloritization, sericitization, and actinolitization are the principal types of hydrothermal alteration. LAICP-MS U-Pb dating yielded ages of 326.5±4.5 and 298.5±1.5 Ma for zircons from the tuff and diorite porphyry, respectively. Given that the tuff is wall rock and that the orebodies are cut by a late diorite porphyry dike, the ages of the tuff and the diorite porphyry provide lower and upper time limits on the age of ore formation. The δ13C values of the calcite samples range from-2.5‰ to 2.3‰, the δ18OH2 Oand δDVSMOWvalues of the sulfide stage(Stage Ⅲ) vary from 1.1‰ to 5.2‰ and-111.7‰ to-66.1‰, respectively,and the δ13C, δ18OH2 Oand δDV-SMOWvalues of calcite in one Stage IV sample are 1.5‰,-0.3‰, and-115.6‰, respectively. Carbon, hydrogen, and oxygen isotopic compositions indicate that the ore-forming fluids evolved gradually from magmatic to meteoric sources. The δ34SV-CDTvalues of the sulfides have a large range from-6.9‰ to 1.4‰, with an average of-2.2‰, indicating a magmatic source, possibly with sedimentary contributions. The206Pb/204Pb,207Pb/204Pb, and208Pb/204Pb ratios of the sulfides are 17.9848-18.2785,15.5188-15.6536, and 37.8125-38.4650, respectively, and one whole-rock sample at Weiquan yields206Pb/204Pb,207Pb/204Pb, and208Pb/204Pb ratios of 18.2060, 15.5674, and 38.0511,respectively. Lead isotopic systems suggest that the ore-forming materials of the Weiquan deposit were derived from a mixed source involving mantle and crustal components. Based on geological features, zircon U-Pb dating, and C-H-OS-Pb isotopic data, it can be concluded that the Weiquan polymetallic deposit is a skarn type that formed in a tectonic setting spanning a period from subduction to post-collision. The ore materials were sourced from magmatic ore-forming fluids that mixed with components derived from host rocks during their ascent, and a gradual mixing with meteoric water took place in the later stages.
