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基于Logistic模型和SPC算法的关键技术识别与预测——以卫星互联网为例

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中国电子科学研究院学报 2024年第4期19卷 380-392页

作者：袁野王学聪朱浩孙三山重庆邮电大学网络强国研究基地重庆400065 重庆邮电大学经济管理学院重庆400065 重庆邮电大学数字经济科技创新研究中心重庆400065 四川师范大学物理与电子工程学院四川成都610101

识别关键技术有助于在制定技术和市场战略布局中获得先发优势,对我国经济发展、国家安全具有重要意义。文中提出一种融合生命周期与主路径分析的关键技术识别方法,是对已有的研究理论和方法的重要补充。首先,检索相关领域专利数据并进... 详细信息

识别关键技术有助于在制定技术和市场战略布局中获得先发优势,对我国经济发展、国家安全具有重要意义。文中提出一种融合生命周期与主路径分析的关键技术识别方法,是对已有的研究理论和方法的重要补充。首先,检索相关领域专利数据并进行技术划分;然后,综合运用Lo-gistic模型和SPC算法构建技术轨道,识别关键技术;接着,使用显性技术优势指数比较主要国家技术竞争态势;最后,结合关键技术与技术竞争态势绘制技术路线图,识别技术热点与前沿预测。以卫星互联网为例,阐述该方法的应用过程。研究结果表明,该方法能够较为准确识别出该领域关键技术,揭示全球技术竞争态势,有效实现技术热点识别和未来技术预测;识别出的卫星互联网关键技术,能够为国家发展政策制定与相关产业布局提供参考。

关键词：关键技术 Logistic模型 SPC算法技术热点技术预测卫星互联网

Impact of non-oncological factors on tumor recurrence after liver transplantation in hepatocellular carcinoma patients

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World Journal of Gastroenterology 2016年第9期22卷 2749-2759页

作者： Xiang-Qian Gu Wei-Ping Zheng Da-Hong Teng Ji-san sun Hong Zheng Organ Transplant Center The First Central Clinical College Tianjin Medical University Organ Transplant Center Tianjin First Central Hospital

Hepatocellular carcinoma (HCC) is the most common primary neoplasm of the liver and is one of the leading causes of cancer-related death worldwide. Liver transplantation (LT) has become one of the best curative therapeutic options for patients with HCC, although tumor recurrence after LT is a major and unaddressed cause of mortality. Furthermore, the factors that are associated with recurrence are not fully understood, and most previous studies have focused on the biological properties of HCC, such as the number and size of the HCC nodules, the degree of differentiation, the presence of hepatic vascular invasion, elevated serum levels of alpha-fetoprotein, and the tumor stage outside of the Milan criteria. Thus, little attention has been given to factors that are not directly related to HCC (i.e., “non-oncological factors”), which have emerged as predictors of tumor recurrence. This review was performed to assess the effects of non-oncological factors on tumor recurrence after LT. The identification of these factors may provide new research directions and clinical strategies for the prophylaxis and surveillance of tumor recurrence after LT, which can help reduce recurrence and improve patient survival.

关键词： Liver transplantation Immunosuppressive agents Hepatocellular carcinoma Recurrence Living donor Deceased donor

Ca^(2+)浸种对酸雨伤害玉米幼苗的影响

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中国环境科学 2001年第2期21卷 185-188页

作者：束良佐孙五三淮北煤炭师范学院生物系安徽淮北235000

通过砂培实验,研究了钙浸种对酸雨伤害玉米幼苗的防护效应.结果表明,酸雨胁迫下,玉米幼苗叶绿素含量减少,叶绿素a/b比值下降,叶片汁液的pH值降低,SOD-超氧化物歧化酶-活性先升高,而在pH值2.5的酸雨胁迫下转而下降, CAT-过氧化氢酶-活性... 详细信息

通过砂培实验,研究了钙浸种对酸雨伤害玉米幼苗的防护效应.结果表明,酸雨胁迫下,玉米幼苗叶绿素含量减少,叶绿素a/b比值下降,叶片汁液的pH值降低,SOD-超氧化物歧化酶-活性先升高,而在pH值2.5的酸雨胁迫下转而下降, CAT-过氧化氢酶-活性水平下降,POD-过氧化物酶-活性明显增加,脂质过氧化加剧；而在同一强度酸雨胁迫下,经CaCl2浸种预处理的玉米幼苗叶片细胞汁液pH值较稳定,CAT、SOD的活性水平相对较高,POD活性水平相对较低,叶绿素、蛋白质含量及净光合速率增加,脂质过氧化作用减弱.因此Ca2+浸种对酸雨伤害玉米幼苗有一定的防护作用.

关键词：钙浸种玉米幼苗酸雨胁迫钙离子

Assessment of the conventional molybdenum-blue and magnesium-induced coprecipitation procedures in phosphorus measurement in various aquatic environments

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Acta Oceanologica Sinica 2010年第1期29卷 42-51页

作者： LIU Sumei ZHAO Yingfei REN Jingling ZHANG Jing sun san JIN Jie Key Laboratory of Marine Chemistry Theory and Technology Ministry of Education College of Chemistry and Chemical Engineering Ocean University of Qingdao Qingdao 266100 China State Key Laboratory of Estuarine and Coastal Research East China Normal University Shanghai 200062 China

Phosphorus （P） is an essential nutrient utilized by all organisms for energy transport and growth. Both the conventional molybdenum-blue method and the magnesium-induced coprecipitation （MAGIC） procedures were applied for the measurement of dissolved inorganic phosphorus （DIP） and total dissolved phosphorus （TDP） in more than 840 water samples collected between 2003 and 2005, including seawater （the Huanghai Sea, the East China Sea, and the northern South China Sea）, water from rivers and estuaries （the Changjiang, the Huanghe, and the major rivers emptying into the Jiaozhou Bay）, groundwater （in the drainage basin surrounding the Jiaozhou Bay）, rain-water, and aquaculture water samples. The MAGIC method allows the investigation of phosphorus distributions and cycling for systems in which DIP is below the detection limits of conventional methods. Comparison between the two methods demonstrated that the concentrations obtained with both methods were significantly correlated. The differences of DIP and TDP concentrations measured with the two methods were higher when the concentrations of DIP and TDP were lower, implying the lower reproducibility at low concentrations. The concentration differences increase with the increase in the proportion of DOP in TDP, which indicates that the discrepancy of DIP concentrations measured with the two methods increases when the DOP concentration is high. The discrepancies indicated that the composition of P compounds differs depending on sample sources and water type; it would be useful to infer the presence of different phosphorus compound pools from differences between the two methods. This study indicates the potential presence of a pool of alkaline-labile compounds for samples from rainwater and rivers and estuaries surrounding the Jiaozhou Bay; the potential presence of acid-labile compounds that were adsorbed by Mg（OH）2 for samples from the Changjiang Estuary, Huanghai Sea, East China Sea, and groundwater; the potential presen

关键词： phosphorus magnesium-induced coprecipitation conventional blue phosphomolybic acid assay various aquatic environments

Mechanism and control of nonuniform phase transformation of microalloyed dual-phase steel during cooling process after hot rolling

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Journal of Iron and Steel Research International 2024年第2期31卷 428-441页

作者： Wen-quan sun Sheng-yi Yong Tie-heng Yuan Chao Liu san-bao Zhou Rui-chun Guo Meng-xia Tang National Engineering Research Center for Advanced Rolling and Intelligent Manufacturing University of Science and Technology BeijingBeijing100083China Strip Production Plant Xichang Steel and Vanadium Corporation of Pangang GroupXichang615000SichuanChina

After cooling in the hot rolling process,the metallographic structure of microalloyed dual-phase steel is nonuniform along the rolling direction,while the thickness fluctuation of microalloyed dual-phase steel with a nonuniform metallographic structure will occur during cold *** mechanism of nonuniform phase transformation of microalloyed dual-phase steels was studied during the cooling process after hot rolling,and the nonuniform phase transformation of microalloyed dual-phase steel was regulated during the cooling process after hot rolling through process ***,the empirical equation of phase transformation temperature was measured by a dilatometer considering thermal ***,the phase field and temperature field of laminar cooling process were calculated to provide initial boundary conditions for the finite element *** that,the coupling finite element model of the temperature phase transformation of the strip steel in coiling transportation process was *** simulation results show that the different thermal contact conditions of the microalloyed dual-phase steel during coil transportation lead to uneven cooling of the coil,which leads to nonuniform transformation of the coil along the rolling *** addition,by prolonging the time interval from coiling to unloading,the phenomenon of nonuniform phase transformation of microalloyed dual-phase steel can be effectively *** simulation results are applied to industrial *** application results show that prolonging the time interval from coiling to unloading can effectively improve the nonuniform phase transformation of microalloyed dual-phase steel in the cooling process after hot rolling.

关键词： Microalloyed dual-phase steel Thickness fluctuation Cooling Heat conduction Nonuniform phase transition Finite element method

Global hybrid simulations of soft X-ray emissions in the Earth’s magnetosheath

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Earth and Planetary Physics 2024年第1期8卷 47-58页

作者： Jin Guo TianRan sun san Lu QuanMing Lu Yu Lin XueYi Wang Chi Wang RongSheng Wang Kai Huang School of Earth and Space Sciences University of Science and Technology of ChinaHefei 230026China CAS Center for Excellence in Comparative Planetology/CAS Key Lab of Geospace Environment University of Science and Technology of ChinaHefei 230026China Collaborative Innovation Center of Astronautical Science and Technology Harbin 150001China National Space Science Center Chinese Academy of SciencesBeijing 100190China Physics Department Auburn UniversityAuburnALUSA

Earth’s magnetopause is a thin boundary separating the shocked solar wind plasma from the magnetospheric plasmas,and it is also the boundary of the solar wind energy transport to the *** X-ray imaging allows investigation of the large-scale magnetopause by providing a two-dimensional(2-D)global view from a *** performing 3-D global hybrid-particle-in-cell(hybrid-PIC)simulations,we obtain soft X-ray images of Earth’s magnetopause under different solar wind conditions,such as different plasma densities and directions of the southward interplanetary magnetic *** all cases,magnetic reconnection occurs at low latitude *** soft X-ray images observed by a hypothetical satellite are shown,with all of the following identified:the boundary of the magnetopause,the cusps,and the *** X-ray emissivity in the magnetosheath is characterized by large amplitude fluctuations(up to 160%);however,the maximum line-of-sight-integrated X-ray intensity matches the tangent directions of the magnetopause well,indicating that these fluctuations have limited impact on identifying the magnetopause boundary in the X-ray ***,the magnetopause boundary can be identified using multiple viewing *** also find that solar wind conditions have little effect on the magnetopause *** Solar wind Magnetosphere Ionosphere Link Explorer(SMILE)mission will provide X-ray images of the magnetopause for the first time,and our global hybrid-PIC simulation results can help better understand the 2-D X-ray images of the magnetopause from a 3-D perspective,with particle kinetic effects considered.

关键词： magnetopause X-ray emissivity X-ray imaging SMILE global hybrid-PIC simulation

Experimental Study of Effect of Perfluorohexyloctane to Retina

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Eye Science 2002年第1X期18卷 49-53页

作者： Chunfang Li, Xiaoyan Ding, Lin Lu, Guanguang Feng, Huling ZhengZhongshan Ophthalmic center, sun Yet-san University, Guangzhou, 510060 , China Zhongshan Ophthalmic center Sun Yet-san University Guangzhou 510060 China

Objective: To investigate the effect of perfluorohexvloctane to the retina of rabbit ***: Perfluoroh-exyloctane (experimental group) or BSS(control group) intovitreous cavities of fifteen vitrectomized New Zealand white rabbits. A slit-lampbiomicroscope and an indirect ophthalmoscope were used to examine all the eyes pre- andpostoperation. Histopathological examination was performed after the rabbits weresacrificed. Results:Perfluorohexyloctane was injected into the vitreous cavity forming a single largeclear globe. No retinal detachment and cataract were found. The edema of outer plexiformlayer was significant, and then get thin, inner nuclear layer and ganglion cell bodies hada darker cytop: lasm and nucleoplasm. Conclusions: Perfluorohexyloctane in vitreous cavity had significant side effects on retinaAs a silicone solvent, it should be removed out completely after injection. We don′trecommend to use it as a new intraocular temponade.

关键词：视网膜 F6H8 玻璃体替代物玻璃体切除

APPLICATION OF MEDICAL FIBRIN GLUE IN GENERALSURGICAL OPERATION

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Chinese Journal of Biomedical Engineering(English Edition) 1997年第3期6卷 212-213页

作者： Li Honghao(Surgery Departmentof sun-Yet-san Memorial Hospital)

Liver retransplantation for ischemic-type biliary lesions after orthotopic liver transplantation:a clinical report of 66 cases

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Hepatobiliary & Pancreatic Diseases International 2008年第5期7卷 471-475页

作者： Zhu, Zhi-Jun Rao, Wei sun, Ji-san Cai, Jin-Zhen Deng, Yong-Lin Zheng, Hong Zhang, Ya-Min Jiang, Wen-Tao Zhang, Jian-Jun Gao, Wei Shen, Zhong-Yang Tianjin First Cent Hosp Transplant Ctr Dept Organ Transplantat Tianjin 300192 Peoples R China

BACKGROUND: Ischemic-type biliary lesions (ITBLs) play an extremely important role in influencing the long-term survival and quality of life of recipients after orthotopic liver transplantation (OLT). Some patients can be cured by interventional therapies, however others lose their grafts at last and receive liver retransplantation (re-OLT). The aim of this study was to analyze the data of 66 patients who had received re-OLT at our center because of ITBL and to discuss the treatment of ITBL after OLT. METHODS: We retrospectively analyzed 66 re-OLT cases due to ITBL from September 2001 to February 2007 at our center. The Kaplan-Meier method and the Cox-Mantel test were used to identify factors associated with mortality for univariate analysis and multivariate analysis, respectively. RESULTS: Fifty-five of 66 ITBL cases underwent interventional therapies before re-OLT. The actuarial survival at I month and I year for these patients was 83% and 74%, respectively. Prognostic factors for mortality in univariate analysis were model of end-stage liver disease score (MELD) >16.5 (chi(2)=5.856, P=0.016), cold ischemia time >8 hours (chi(2)=6.539, P=0.011), infections (chi(2)=5.550, P=0.018) and complications (chi(2)=12.168, P=0.002) after re-OLT. In the multivariate analysis (Cox regression), the risk factors independently associated with mortality were MELD score >16.5 (RR: 3.140; P=0.035), cold ischemia time >8.2 hours (RR: 0.192; P=0.016) and complications (RR: 3.896, P=0.003). CONCLUSIONS: The incidence of ITBL in China is higher than in other countries. Based on our experience, MELD score, cold ischemia time and complications after re-OLT are risk factors independently associated with mortality in retransplanted ITBL patients.

关键词： ischemic-type biliary lesions liver transplantation retansplantation risk factor