According to specifications for Welding Procedure Qualification of ASME IX Section and Chinese code, JB 4708 2000, a software package for managing welding documents has been rebuilt. Consequently, the new software pa...According to specifications for Welding Procedure Qualification of ASME IX Section and Chinese code, JB 4708 2000, a software package for managing welding documents has been rebuilt. Consequently, the new software package can be used in a Limited Area Network (LAN) with 4 different levels of authorities for different users. Therefore, the welding documents, including DWPS (Design for Welding Procedure Specifications), PQRs (Procedure Qualification Records) and WPS (Welding Procedure Specifications) can be shared within a company. At the same time, the system provides users various functions such as browsing, copying, editing, searching and printing records, and helps users to make decision of whether a new PQR test is necessary or not according to the codes above as well. Furthermore, super users can also browse the history of record modification and retrieve the records when needed.展开更多
Impurity formation energy, electronic structure, and photocatalytic properties of C-, N-, or S-doped BiOCl are investigated by density-functional theory plus U calculations(DFT + U). Results show that the doping effec...Impurity formation energy, electronic structure, and photocatalytic properties of C-, N-, or S-doped BiOCl are investigated by density-functional theory plus U calculations(DFT + U). Results show that the doping effect of S is better than that of C or N on the tunable photocatalytic activities of BiOCl. At low concentration, S-doped BiOCl systems are the most stable under Bi-rich growth conditions because of their lower impurity-formation energy. Compared with the electronic structures of S-doped BiOCl, C-or N-doped BiOCl have relatively deeper impurity energy levels appearing in their band gap(except Bi_(36)O_(35)NCl_(36)), which may act as photogenerated carrier-recombination centers and reduce photocatalytic activity. At high concentration, S is substituted on the O lattice site system, whereas some S 3p states mix with the valence band; this mixture leads to an obvious band-gap decrease and continuum-state formation above the valence-band edge of BiOCl. Such activity is advantageous to photochemical catalysis response. Compared with pure Bi OCl and a low-concentration S-doped system, a high-concentration S-doped system shows an obvious redshift on the absorption edge and has better photocatalytic O_2 evolution performance.展开更多
目的:探究单纯疱疹病毒(HSV)感染后脑脊液(CSF)中S100B、Cys-C、MMP-9水平对自身免疫性脑炎(AE)的预测价值。方法:选取2016年1月至2021年3月河北中石油中心医院收治的200例HSV感染患者为研究对象,根据是否继发AE分为研究组(继发AE,35例...目的:探究单纯疱疹病毒(HSV)感染后脑脊液(CSF)中S100B、Cys-C、MMP-9水平对自身免疫性脑炎(AE)的预测价值。方法:选取2016年1月至2021年3月河北中石油中心医院收治的200例HSV感染患者为研究对象,根据是否继发AE分为研究组(继发AE,35例)和对照组(未继发AE,165例)。多因素Logistic回归分析HSV感染患者继发AE的独立影响因素。Spearman法分析脑脊液中Cys-C、MMP-9与S100B水平的相关性。受试者工作特征(ROC)曲线分析S100B、Cys-C、MMP-9对AE的预测价值。构建风险预测模型并进行评价。结果:多因素Logistic回归分析显示,MRI异常、脑脊液S100B、MMP-9升高、EEG异常是HSV感染患者继发AE的独立危险因素,脑脊液Cys-C是其保护因素(P<0.05)。Spearman分析显示,HSV感染患者Cys-C浓度与S100B水平呈负相关(r=-0.83,P<0.05),MMP-9浓度与S100B水平呈正相关(r=0.88,P<0.05)。构建的联合预测因子pre1诊断HSV患者继发AE的AUC明显大于S100B、Cys-C、MMP-9单独预测的AUC(0.876 vs 0.827、0.787、0.750)。构建的风险预测模型具有良好的区分度和一致性。结论:脑脊液中S100B、Cys-C、MMP-9水平均可对HSV感染患者诱发AE的可能性进行有效预测,且三项指标联合预测价值最大,其次是S100B蛋白、Cys-C、MMP-9。展开更多
(CH_3C_5H_4)Zr(S_2CNBz_2)_3, Mr=987.55, space group P1, a=13.002(4), b=13.659(3), c=29.685(8); α=100.72(2)~o,β=97.23(2)~o, γ=105.36(2)~o; V=4909(2)~3, Z=4, Dc=1.34gcm^(-3), Mo-K(λ=0.71073A) radiation, μ=5.0cm^(-1...(CH_3C_5H_4)Zr(S_2CNBz_2)_3, Mr=987.55, space group P1, a=13.002(4), b=13.659(3), c=29.685(8); α=100.72(2)~o,β=97.23(2)~o, γ=105.36(2)~o; V=4909(2)~3, Z=4, Dc=1.34gcm^(-3), Mo-K(λ=0.71073A) radiation, μ=5.0cm^(-1), R=0.069, Rw=0.078 for 6100 reflections. The title complex has pentagonal bipyramid configuration in which the zirconium atom is coordinated by one CH_3C_5H_4 group and three bidentate dibenzyldithiocarbamate ligands.展开更多
Cp;ZrCl（S;CNBz;） is a five-coordinate bent zirconocene in which the dibenzyldithiocarbamate is a bidentate ligand (Zr-Cl 2.549（1）A; Zr-C 2.489-2.533; Zr-S 2.667（1）, 2.734（1）; Zr-Cl-S1 137.6（1）;; Zr-Cl-S2 73....Cp;ZrCl（S;CNBz;） is a five-coordinate bent zirconocene in which the dibenzyldithiocarbamate is a bidentate ligand (Zr-Cl 2.549（1）A; Zr-C 2.489-2.533; Zr-S 2.667（1）, 2.734（1）; Zr-Cl-S1 137.6（1）;; Zr-Cl-S2 73.3（1）;).展开更多
The compound phenol,2-[4（S）-4,5-dihydro-4-phenyl-2-ozazolinyl（1,C15H13NO2） was synthesized with a simple,one step method free of water and air.It was obtained in a moderate yield from the reaction of 2-hydroxybenz...The compound phenol,2-[4（S）-4,5-dihydro-4-phenyl-2-ozazolinyl（1,C15H13NO2） was synthesized with a simple,one step method free of water and air.It was obtained in a moderate yield from the reaction of 2-hydroxybenzonitrile with optically active amino alcohol in chloroben-zene under dry,anaerobic conditions.It belongs to the orthorhombic system,space group P212121 with a = 5.786（5）,b = 10.730（5）,c = 19.722（5）,C15H13NO2,Mr = 239.26,V = 1224.4（12）3,Z = 4 and Dc = 1.298 mg/m3.The final R = 0.0324 for 1627 observed reflections with Ⅰ 〉 2σ（Ⅰ） and Rw = 0.0826 for all data.The structure of compound 1 was determined by X-ray diffraction,NMR and HRMS.展开更多
Background: The World Health Organization (WHO) has set a goal to eradicate or at least significantly reduce the prevalence the human immunodeficiency virus (HIV), hepatitis B Virus (HBV) and Hepatitis C Virus (HCV) b...Background: The World Health Organization (WHO) has set a goal to eradicate or at least significantly reduce the prevalence the human immunodeficiency virus (HIV), hepatitis B Virus (HBV) and Hepatitis C Virus (HCV) by 2030. The main objective was to provide an evolving overview of the prevalence of HIV, HBV and HCV infection between 2003 and 2022 in Burkina Faso. Methods: It was a retrospective cross-sectional study based on data from 2003 to 2022. The data were collected using information available in the databases of the HOSCO and CERBA laboratories and included all individuals who underwent HIV and/or HBV and/or HCV testing. Data analysis was performed using SPSS version 20.0, EpiInfo 7, and R version 4.1.0. Results were considered statistically significant if p Results: The study recorded 7432 samples and the mean age of the subjects was 27.98 ± 8.50 years. During this period, the respective prevalence of HIV, HBV, and HCV were 4.66% (346/7432), 8.77% (582/6636) and 5.54% (322/5816). However, from 2003 to 2022, there was a significant decrease (P y=−1.75x+12.59;y=−0.24x+10.01and y=−0.11x+6.02, with “y” corresponding to prevalence and “x” to the years. Conclusion: Burkina Faso needs to rigorously apply prevention and control strategies recommended by the WHO by 2030.展开更多
目的探讨S100b联合CRP在诊断早产儿脑损伤(Brain injury in premature infants,BIPI)中的临床效能。方法选择2022年1月—2024年1月于本院儿科确诊的125例BIPI患儿作为BIPI组,另选择同期收治的85例非BIPI早产儿作为对照组。根据BIPI患儿...目的探讨S100b联合CRP在诊断早产儿脑损伤(Brain injury in premature infants,BIPI)中的临床效能。方法选择2022年1月—2024年1月于本院儿科确诊的125例BIPI患儿作为BIPI组,另选择同期收治的85例非BIPI早产儿作为对照组。根据BIPI患儿病情严重程度分为轻度BIPI组和重度BIPI组两组亚组。收集所有研究对象的临床资料并检测血清中S100b联合CRP表达水平。Logistic回归分析发生BIPI的危险因素,S100b联合CRP在诊断BIPI的临床效能采用ROC曲线分析。结果对照组、轻度BIPI组和重度BIPI组三组间S100b、CRP表达水平存在统计学差异(P<0.05)。与对照组相比,轻度和重度BIPI组S100b、CRP表达水平均明显升高(P<0.05);与轻度BIPI组相比,重度BIPI组S100b、CRP表达水平均明显升高(P<0.05)。与对照组相比,宫内窘迫、出生后窒息、有创机械通气、新生儿呼吸窘迫综合征发生率及血清中S100b、CRP表达水平在BIPI组中明显升高(P<0.05)。Logistic回归分析结果显示,有创机械通气(OR=1.432)、新生儿呼吸窘迫综合征(OR=2.543)、S100b(OR=3.782)和CRP表达(OR=3.449)是发生BIPI的危险因素。S100b及CRP在诊断BIPI的曲线下面积分别为0.895和0.812,S100b联合CRP在诊断BIPI的曲线下面积为0.931,诊断敏感度和特异度分别为97.43%和92.25%。结论BIPI患儿外周血中S100b和CRP表达水平显著升高,S100b联合CRP在诊断BIPI中具有显著的临床价值。展开更多
The samples of the C-S-H series were synthesized by hydrothermal reaction of fumed silica, CaO and deionized water at initial C/S ratios between 1.0-1.7. Phase composition and structural and morphology characteristics...The samples of the C-S-H series were synthesized by hydrothermal reaction of fumed silica, CaO and deionized water at initial C/S ratios between 1.0-1.7. Phase composition and structural and morphology characteristics of C-S-H samples were analyzed by XRD, IR and SEM. The experimental results showed that the d-spacing of （002）, （110） and （020） decreased, the d-spacing of （200） increased, and the d-spacing of （310） varied randomly, the polymerization of silica tetrahedra of C-S-H decreased, and morphology of C-S-H samples varied from sheet shapes to long reticular fibers as C/S ratio increased.展开更多
The effects of polyaerylamide （PAM） and polyvinyl alcohol （PVA） on morphology and structure of calcium silica~ hydrate with C/S 1.0-1.7 prepared via precipitation in solution were investigated by XRD, FT-IR and TE...The effects of polyaerylamide （PAM） and polyvinyl alcohol （PVA） on morphology and structure of calcium silica~ hydrate with C/S 1.0-1.7 prepared via precipitation in solution were investigated by XRD, FT-IR and TEM techniques. The results show that incorporation of the polymers decreased the order degree, increased the interlayer spacing and disturbed the layered stacking of C-S-H. Interlayer spacing expansion depended on C/S ratios and type of polymer. Interlayer spacing expansion had a minimum at C/S 1.0 and a maximum at C/S 1.3 and 1.5. Interlayer spacing expansion of PAM was bigger than that of PVA with the same C/S. C-S-H added with PVA mainly exhibited foil-like and fibrillar morphology. The fibrils were of variable length from a few tens of nanometers to a few hundreds of nanometers. Fibrils or foils seemed to be longer in the presence of PVA.展开更多
文摘According to specifications for Welding Procedure Qualification of ASME IX Section and Chinese code, JB 4708 2000, a software package for managing welding documents has been rebuilt. Consequently, the new software package can be used in a Limited Area Network (LAN) with 4 different levels of authorities for different users. Therefore, the welding documents, including DWPS (Design for Welding Procedure Specifications), PQRs (Procedure Qualification Records) and WPS (Welding Procedure Specifications) can be shared within a company. At the same time, the system provides users various functions such as browsing, copying, editing, searching and printing records, and helps users to make decision of whether a new PQR test is necessary or not according to the codes above as well. Furthermore, super users can also browse the history of record modification and retrieve the records when needed.
基金This project was supported by the China Postdoctoral Science Foundation,Henan Postdoctoral Science Foundation,NCWU 2017 Annual Teaching Teacher Training Object ProjectKey Research Projects of Higher Education in Henan Province(18B150010)+1 种基金the Key Scientific Research Project of Henan Higher Education(No.17A520011)the Science and Technology Research Project of Henan Province(182102110029)
文摘Impurity formation energy, electronic structure, and photocatalytic properties of C-, N-, or S-doped BiOCl are investigated by density-functional theory plus U calculations(DFT + U). Results show that the doping effect of S is better than that of C or N on the tunable photocatalytic activities of BiOCl. At low concentration, S-doped BiOCl systems are the most stable under Bi-rich growth conditions because of their lower impurity-formation energy. Compared with the electronic structures of S-doped BiOCl, C-or N-doped BiOCl have relatively deeper impurity energy levels appearing in their band gap(except Bi_(36)O_(35)NCl_(36)), which may act as photogenerated carrier-recombination centers and reduce photocatalytic activity. At high concentration, S is substituted on the O lattice site system, whereas some S 3p states mix with the valence band; this mixture leads to an obvious band-gap decrease and continuum-state formation above the valence-band edge of BiOCl. Such activity is advantageous to photochemical catalysis response. Compared with pure Bi OCl and a low-concentration S-doped system, a high-concentration S-doped system shows an obvious redshift on the absorption edge and has better photocatalytic O_2 evolution performance.
文摘目的:探究单纯疱疹病毒(HSV)感染后脑脊液(CSF)中S100B、Cys-C、MMP-9水平对自身免疫性脑炎(AE)的预测价值。方法:选取2016年1月至2021年3月河北中石油中心医院收治的200例HSV感染患者为研究对象,根据是否继发AE分为研究组(继发AE,35例)和对照组(未继发AE,165例)。多因素Logistic回归分析HSV感染患者继发AE的独立影响因素。Spearman法分析脑脊液中Cys-C、MMP-9与S100B水平的相关性。受试者工作特征(ROC)曲线分析S100B、Cys-C、MMP-9对AE的预测价值。构建风险预测模型并进行评价。结果:多因素Logistic回归分析显示,MRI异常、脑脊液S100B、MMP-9升高、EEG异常是HSV感染患者继发AE的独立危险因素,脑脊液Cys-C是其保护因素(P<0.05)。Spearman分析显示,HSV感染患者Cys-C浓度与S100B水平呈负相关(r=-0.83,P<0.05),MMP-9浓度与S100B水平呈正相关(r=0.88,P<0.05)。构建的联合预测因子pre1诊断HSV患者继发AE的AUC明显大于S100B、Cys-C、MMP-9单独预测的AUC(0.876 vs 0.827、0.787、0.750)。构建的风险预测模型具有良好的区分度和一致性。结论:脑脊液中S100B、Cys-C、MMP-9水平均可对HSV感染患者诱发AE的可能性进行有效预测,且三项指标联合预测价值最大,其次是S100B蛋白、Cys-C、MMP-9。
文摘(CH_3C_5H_4)Zr(S_2CNBz_2)_3, Mr=987.55, space group P1, a=13.002(4), b=13.659(3), c=29.685(8); α=100.72(2)~o,β=97.23(2)~o, γ=105.36(2)~o; V=4909(2)~3, Z=4, Dc=1.34gcm^(-3), Mo-K(λ=0.71073A) radiation, μ=5.0cm^(-1), R=0.069, Rw=0.078 for 6100 reflections. The title complex has pentagonal bipyramid configuration in which the zirconium atom is coordinated by one CH_3C_5H_4 group and three bidentate dibenzyldithiocarbamate ligands.
文摘Cp;ZrCl（S;CNBz;） is a five-coordinate bent zirconocene in which the dibenzyldithiocarbamate is a bidentate ligand (Zr-Cl 2.549（1）A; Zr-C 2.489-2.533; Zr-S 2.667（1）, 2.734（1）; Zr-Cl-S1 137.6（1）;; Zr-Cl-S2 73.3（1）;).
文摘The compound phenol,2-[4（S）-4,5-dihydro-4-phenyl-2-ozazolinyl（1,C15H13NO2） was synthesized with a simple,one step method free of water and air.It was obtained in a moderate yield from the reaction of 2-hydroxybenzonitrile with optically active amino alcohol in chloroben-zene under dry,anaerobic conditions.It belongs to the orthorhombic system,space group P212121 with a = 5.786（5）,b = 10.730（5）,c = 19.722（5）,C15H13NO2,Mr = 239.26,V = 1224.4（12）3,Z = 4 and Dc = 1.298 mg/m3.The final R = 0.0324 for 1627 observed reflections with Ⅰ 〉 2σ（Ⅰ） and Rw = 0.0826 for all data.The structure of compound 1 was determined by X-ray diffraction,NMR and HRMS.
文摘Background: The World Health Organization (WHO) has set a goal to eradicate or at least significantly reduce the prevalence the human immunodeficiency virus (HIV), hepatitis B Virus (HBV) and Hepatitis C Virus (HCV) by 2030. The main objective was to provide an evolving overview of the prevalence of HIV, HBV and HCV infection between 2003 and 2022 in Burkina Faso. Methods: It was a retrospective cross-sectional study based on data from 2003 to 2022. The data were collected using information available in the databases of the HOSCO and CERBA laboratories and included all individuals who underwent HIV and/or HBV and/or HCV testing. Data analysis was performed using SPSS version 20.0, EpiInfo 7, and R version 4.1.0. Results were considered statistically significant if p Results: The study recorded 7432 samples and the mean age of the subjects was 27.98 ± 8.50 years. During this period, the respective prevalence of HIV, HBV, and HCV were 4.66% (346/7432), 8.77% (582/6636) and 5.54% (322/5816). However, from 2003 to 2022, there was a significant decrease (P y=−1.75x+12.59;y=−0.24x+10.01and y=−0.11x+6.02, with “y” corresponding to prevalence and “x” to the years. Conclusion: Burkina Faso needs to rigorously apply prevention and control strategies recommended by the WHO by 2030.
文摘目的探讨S100b联合CRP在诊断早产儿脑损伤(Brain injury in premature infants,BIPI)中的临床效能。方法选择2022年1月—2024年1月于本院儿科确诊的125例BIPI患儿作为BIPI组,另选择同期收治的85例非BIPI早产儿作为对照组。根据BIPI患儿病情严重程度分为轻度BIPI组和重度BIPI组两组亚组。收集所有研究对象的临床资料并检测血清中S100b联合CRP表达水平。Logistic回归分析发生BIPI的危险因素,S100b联合CRP在诊断BIPI的临床效能采用ROC曲线分析。结果对照组、轻度BIPI组和重度BIPI组三组间S100b、CRP表达水平存在统计学差异(P<0.05)。与对照组相比,轻度和重度BIPI组S100b、CRP表达水平均明显升高(P<0.05);与轻度BIPI组相比,重度BIPI组S100b、CRP表达水平均明显升高(P<0.05)。与对照组相比,宫内窘迫、出生后窒息、有创机械通气、新生儿呼吸窘迫综合征发生率及血清中S100b、CRP表达水平在BIPI组中明显升高(P<0.05)。Logistic回归分析结果显示,有创机械通气(OR=1.432)、新生儿呼吸窘迫综合征(OR=2.543)、S100b(OR=3.782)和CRP表达(OR=3.449)是发生BIPI的危险因素。S100b及CRP在诊断BIPI的曲线下面积分别为0.895和0.812,S100b联合CRP在诊断BIPI的曲线下面积为0.931,诊断敏感度和特异度分别为97.43%和92.25%。结论BIPI患儿外周血中S100b和CRP表达水平显著升高,S100b联合CRP在诊断BIPI中具有显著的临床价值。
基金Funded by the National Basic Research Program of China (973 Program) (No. 2009CB623201)the National Natural Science Foundation of China (No.51072150)
文摘The samples of the C-S-H series were synthesized by hydrothermal reaction of fumed silica, CaO and deionized water at initial C/S ratios between 1.0-1.7. Phase composition and structural and morphology characteristics of C-S-H samples were analyzed by XRD, IR and SEM. The experimental results showed that the d-spacing of （002）, （110） and （020） decreased, the d-spacing of （200） increased, and the d-spacing of （310） varied randomly, the polymerization of silica tetrahedra of C-S-H decreased, and morphology of C-S-H samples varied from sheet shapes to long reticular fibers as C/S ratio increased.
基金Funded by National Natural Science Foundation of China(Nos51072150,51272193)Program for New Century Excellent Talents inUniversity(No.NCET-10-0660)the Fundamental Research Fundsfor the Central Universities(Nos.2012-Ia-010,2013-Ia-015)
文摘The effects of polyaerylamide （PAM） and polyvinyl alcohol （PVA） on morphology and structure of calcium silica~ hydrate with C/S 1.0-1.7 prepared via precipitation in solution were investigated by XRD, FT-IR and TEM techniques. The results show that incorporation of the polymers decreased the order degree, increased the interlayer spacing and disturbed the layered stacking of C-S-H. Interlayer spacing expansion depended on C/S ratios and type of polymer. Interlayer spacing expansion had a minimum at C/S 1.0 and a maximum at C/S 1.3 and 1.5. Interlayer spacing expansion of PAM was bigger than that of PVA with the same C/S. C-S-H added with PVA mainly exhibited foil-like and fibrillar morphology. The fibrils were of variable length from a few tens of nanometers to a few hundreds of nanometers. Fibrils or foils seemed to be longer in the presence of PVA.
