The Ain El Bey abandoned mine, in North-West Tunisia, fits into the geodynamic context of the European and African plate boundary. Ore deposit corresponds to veins and breccia of multiphase Cu–Fe-rich mineralization ...The Ain El Bey abandoned mine, in North-West Tunisia, fits into the geodynamic context of the European and African plate boundary. Ore deposit corresponds to veins and breccia of multiphase Cu–Fe-rich mineralization related to various hydrothermal fluid circulations. Petromineralogical studies indicate a rich mineral paragenesis with a minimum of seven mineralization phases and, at least, six pyrite generations. As is also the case for galena and native silver, native gold is observed for the first time as inclusion in quartz which opens up, thus, new perspectives for prospecting and evaluating the potential for noble metals associated with the mineralization. Scanning Electron Microscope--Energy Dispersive Spectroscopy and Transmission electron microscopy analyses show, in addition, a large incorporation of trace elements, including Ag and Au, in mineral structures such as fahlores(tetrahedrite-tennantite) and chalcopyrite ones. The mineral/mineral associations, used as geothermometers, gave estimated temperatures for the mineralizing fluids varying from 254 to 330 ℃ for phase Ⅲ, from 254 to 350 ℃ for phase Ⅳ, and from 200 to 300 ℃ for phases Ⅴ and Ⅵ. The seventh and last identified mineralization phase, marked by a deposit of native gold, reflects a drop in the mineralizing fluid’s temperature(< 200 ℃) compatible with boiling conditions. Such results open up perspectives for the development of precious metal research and the revaluation of the Cu–Fe ore deposit at the Ain El Bey abandoned mine, as well as at the surrounding areas fitting in the geodynamic framework of the Africa-Europe plate boundary.展开更多
A senior eitizen shows off his acrobatic skills to an impressed audience at a public exercise park. As more and more Chinese become Increasingly health conscious, the exercise equipment in public parks is becoming pop...A senior eitizen shows off his acrobatic skills to an impressed audience at a public exercise park. As more and more Chinese become Increasingly health conscious, the exercise equipment in public parks is becoming popular with people of all ages.展开更多
With the support by the National Natural Science Foundation of China,Prof.Zhong Xinhua’s laboratory at the School of Chemistry and Molecular Engineering,East China University of Science and Technology,reported the qu...With the support by the National Natural Science Foundation of China,Prof.Zhong Xinhua’s laboratory at the School of Chemistry and Molecular Engineering,East China University of Science and Technology,reported the quantum dot sensitized solar cells(QDSCs)with efficiency beyond 8%by recombination control,which was published in J Am Chem Soc(2015,137:5602—5609).展开更多
Tourism Issue 9,2025.Mermories of the 80th Anniversary of the Victory in the Chinese People's War of Resistance Against Japanese Aggression To commemorate the 80th anniversary of the victory in the Chinese People...Tourism Issue 9,2025.Mermories of the 80th Anniversary of the Victory in the Chinese People's War of Resistance Against Japanese Aggression To commemorate the 80th anniversary of the victory in the Chinese People’s War of Resistance Against Japanese Aggression and the World Anti-Fascist War,let us visit places that bear witness to courage and responsibility-such as the stone lions at Lugou Bridge in Wanping Cilty,the"Underground Great Wall"at Jiaozhuanghu,and Bei Family Garden.By touching history,we come to understand what it means to cherish our homeland;by looking back at our joumey,we draw strength to mowe forward.展开更多
BACKGROUND Gastric cancer is a growing clinical challenge,particularly due to the increased risk of postoperative gastroesophageal reflux disease(GERD)following surgical treatment.traditional Chinese medicine(TCM),inc...BACKGROUND Gastric cancer is a growing clinical challenge,particularly due to the increased risk of postoperative gastroesophageal reflux disease(GERD)following surgical treatment.traditional Chinese medicine(TCM),including acupuncture and herbal medicine,has been proposed as an adjunctive therapy to promote gastrointestinal recovery and alleviate GERD symptoms.AIM To retrospectively study the clinical efficacy of modified Lou Bei Er Chen decoction combined with acupuncture in treating patients with GERD after radical gastrectomy due to gastric cancer.METHODS A retrospective study was conducted,including patients with gastric cancer or malignant tumors of the stomach from January 2019 to December 2023 in the Affiliated Taizhou People’s Hospital of Nanjing Medical University.Patients with a TCM diagnosis of qi depression and phlegm obstruction(n=128)were selected on the basis of prescription and treatment principles.They were then divided into a control group(n=61)and an observation group(n=67).The control group received treatment with Western medicine domperidone.The observation group were treated with Lou Bei Er Chen decoction orally,with acupuncture at specific RESULTS The observation group showed significantly shorter times for first flatus,defecation,bowel sound recovery,and initiation of nasogastric enteral nutrition than the control group(P<0.05).Upon treatment,the two groups demonstrated a significant reduction in gastrointestinal dysfunction scores,with a more significant reduction in the observation group(P<0.001).The GERD-Q scores significantly decreased after 8 weeks of treatment in the two groups(P<0.05),with a significant reduction in the observation group(P<0.05),compared with baseline.The TCM syndrome scores significantly decreased after 4 and 8 weeks of treatment in the two groups(P<0.05),with a significant reduction in the observation group(P<0.05).The effective rate of the observation group after 8 weeks of treatment was significantly higher than that after 4 weeks(χ2=13.648,P=0.003),and it was significantly higher than that of control group(χ2=13.879,P=0.003).CONCLUSION Lou Bei Er Chen decoction combined with acupuncture treatment can effectively alleviate clinical symptoms in patients GERD after gastric cancer surgery and improve their life quality.It is worthy of further promotion and application.展开更多
在网络安全问题中,一种分布式拒绝服务(Distributed deny of services)攻击严重威胁着现有的互联网.针对DDOS攻击基于神经网络算法的防护,因为现有算法收敛性能不高,过滤DDOS攻击包的速度过慢,无法投入大规模商业使用.本文针对这个问题...在网络安全问题中,一种分布式拒绝服务(Distributed deny of services)攻击严重威胁着现有的互联网.针对DDOS攻击基于神经网络算法的防护,因为现有算法收敛性能不高,过滤DDOS攻击包的速度过慢,无法投入大规模商业使用.本文针对这个问题,提出借助SNORT入侵检测平台,利用捕捉的网络数据包进行数据规整化,利用贝叶斯模式对正常数据和异常数据进行初步分离,使得能减少冗余训练数据对神经网络的输入,之后利用改进的反向传播神经网络进行前期数据训练,使训练产生的数据对检测模型进行优化,并且自动生成防御规则.其优势在于:1)在linux系统上实现部分改进,使得现有包过滤效率增强,在攻击目标端生效之前可进行攻击拒绝;2)使用贝叶斯模型减少重复数据和不必要数据的输入,改进的神经网络算法使得训练收敛速度加快,方便规则的重新制定学习,以防新攻击.实验表明,本文方案在一定程度上提高了原有基于神经网络防护DDOS攻击的处理速度,也能够防护若干未知DDOS攻击,训练算法的收敛速度也得到进一步提升,并且该方案能在软件层面上提升自适应抗DDOS软件的性能.展开更多
The technique of derivative constant energy synchronous fluorimetry was intro-duced in this article. For mixture of fluorene, acenaphthene, anthracene and perylene, thedetection limit is 2. 4, 17.1, 0.27, 0.043 ng/mL,...The technique of derivative constant energy synchronous fluorimetry was intro-duced in this article. For mixture of fluorene, acenaphthene, anthracene and perylene, thedetection limit is 2. 4, 17.1, 0.27, 0.043 ng/mL, respectively, when first-derivative con-stant energy synchronous fluorimetry is employed. The detectlon limit is 1. 5, 15. 0, 0.13,0. 022 ng/mL, respectively, when second-derivative constant energy synchronous fluorlme-try is employed. In the method, four compounds can be simultaneously determined withoutany mutual interference.展开更多
基金funded by the “Laboratoire de Recherche Ressources, Matériaux et Ecosystémes”, University of Carthage 7021 Zarzouna, Bizerte, Tunisia
文摘The Ain El Bey abandoned mine, in North-West Tunisia, fits into the geodynamic context of the European and African plate boundary. Ore deposit corresponds to veins and breccia of multiphase Cu–Fe-rich mineralization related to various hydrothermal fluid circulations. Petromineralogical studies indicate a rich mineral paragenesis with a minimum of seven mineralization phases and, at least, six pyrite generations. As is also the case for galena and native silver, native gold is observed for the first time as inclusion in quartz which opens up, thus, new perspectives for prospecting and evaluating the potential for noble metals associated with the mineralization. Scanning Electron Microscope--Energy Dispersive Spectroscopy and Transmission electron microscopy analyses show, in addition, a large incorporation of trace elements, including Ag and Au, in mineral structures such as fahlores(tetrahedrite-tennantite) and chalcopyrite ones. The mineral/mineral associations, used as geothermometers, gave estimated temperatures for the mineralizing fluids varying from 254 to 330 ℃ for phase Ⅲ, from 254 to 350 ℃ for phase Ⅳ, and from 200 to 300 ℃ for phases Ⅴ and Ⅵ. The seventh and last identified mineralization phase, marked by a deposit of native gold, reflects a drop in the mineralizing fluid’s temperature(< 200 ℃) compatible with boiling conditions. Such results open up perspectives for the development of precious metal research and the revaluation of the Cu–Fe ore deposit at the Ain El Bey abandoned mine, as well as at the surrounding areas fitting in the geodynamic framework of the Africa-Europe plate boundary.
文摘A senior eitizen shows off his acrobatic skills to an impressed audience at a public exercise park. As more and more Chinese become Increasingly health conscious, the exercise equipment in public parks is becoming popular with people of all ages.
文摘With the support by the National Natural Science Foundation of China,Prof.Zhong Xinhua’s laboratory at the School of Chemistry and Molecular Engineering,East China University of Science and Technology,reported the quantum dot sensitized solar cells(QDSCs)with efficiency beyond 8%by recombination control,which was published in J Am Chem Soc(2015,137:5602—5609).
文摘Tourism Issue 9,2025.Mermories of the 80th Anniversary of the Victory in the Chinese People's War of Resistance Against Japanese Aggression To commemorate the 80th anniversary of the victory in the Chinese People’s War of Resistance Against Japanese Aggression and the World Anti-Fascist War,let us visit places that bear witness to courage and responsibility-such as the stone lions at Lugou Bridge in Wanping Cilty,the"Underground Great Wall"at Jiaozhuanghu,and Bei Family Garden.By touching history,we come to understand what it means to cherish our homeland;by looking back at our joumey,we draw strength to mowe forward.
文摘BACKGROUND Gastric cancer is a growing clinical challenge,particularly due to the increased risk of postoperative gastroesophageal reflux disease(GERD)following surgical treatment.traditional Chinese medicine(TCM),including acupuncture and herbal medicine,has been proposed as an adjunctive therapy to promote gastrointestinal recovery and alleviate GERD symptoms.AIM To retrospectively study the clinical efficacy of modified Lou Bei Er Chen decoction combined with acupuncture in treating patients with GERD after radical gastrectomy due to gastric cancer.METHODS A retrospective study was conducted,including patients with gastric cancer or malignant tumors of the stomach from January 2019 to December 2023 in the Affiliated Taizhou People’s Hospital of Nanjing Medical University.Patients with a TCM diagnosis of qi depression and phlegm obstruction(n=128)were selected on the basis of prescription and treatment principles.They were then divided into a control group(n=61)and an observation group(n=67).The control group received treatment with Western medicine domperidone.The observation group were treated with Lou Bei Er Chen decoction orally,with acupuncture at specific RESULTS The observation group showed significantly shorter times for first flatus,defecation,bowel sound recovery,and initiation of nasogastric enteral nutrition than the control group(P<0.05).Upon treatment,the two groups demonstrated a significant reduction in gastrointestinal dysfunction scores,with a more significant reduction in the observation group(P<0.001).The GERD-Q scores significantly decreased after 8 weeks of treatment in the two groups(P<0.05),with a significant reduction in the observation group(P<0.05),compared with baseline.The TCM syndrome scores significantly decreased after 4 and 8 weeks of treatment in the two groups(P<0.05),with a significant reduction in the observation group(P<0.05).The effective rate of the observation group after 8 weeks of treatment was significantly higher than that after 4 weeks(χ2=13.648,P=0.003),and it was significantly higher than that of control group(χ2=13.879,P=0.003).CONCLUSION Lou Bei Er Chen decoction combined with acupuncture treatment can effectively alleviate clinical symptoms in patients GERD after gastric cancer surgery and improve their life quality.It is worthy of further promotion and application.
文摘在网络安全问题中,一种分布式拒绝服务(Distributed deny of services)攻击严重威胁着现有的互联网.针对DDOS攻击基于神经网络算法的防护,因为现有算法收敛性能不高,过滤DDOS攻击包的速度过慢,无法投入大规模商业使用.本文针对这个问题,提出借助SNORT入侵检测平台,利用捕捉的网络数据包进行数据规整化,利用贝叶斯模式对正常数据和异常数据进行初步分离,使得能减少冗余训练数据对神经网络的输入,之后利用改进的反向传播神经网络进行前期数据训练,使训练产生的数据对检测模型进行优化,并且自动生成防御规则.其优势在于:1)在linux系统上实现部分改进,使得现有包过滤效率增强,在攻击目标端生效之前可进行攻击拒绝;2)使用贝叶斯模型减少重复数据和不必要数据的输入,改进的神经网络算法使得训练收敛速度加快,方便规则的重新制定学习,以防新攻击.实验表明,本文方案在一定程度上提高了原有基于神经网络防护DDOS攻击的处理速度,也能够防护若干未知DDOS攻击,训练算法的收敛速度也得到进一步提升,并且该方案能在软件层面上提升自适应抗DDOS软件的性能.
文摘The technique of derivative constant energy synchronous fluorimetry was intro-duced in this article. For mixture of fluorene, acenaphthene, anthracene and perylene, thedetection limit is 2. 4, 17.1, 0.27, 0.043 ng/mL, respectively, when first-derivative con-stant energy synchronous fluorimetry is employed. The detectlon limit is 1. 5, 15. 0, 0.13,0. 022 ng/mL, respectively, when second-derivative constant energy synchronous fluorlme-try is employed. In the method, four compounds can be simultaneously determined withoutany mutual interference.
