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组合证券资产选择模糊最优化模型研究

系统工程理论与实践 1998年第8期18卷 26-32,57页

作者：荣喜民张世英天津大学数学系管理学院

提出了考虑收益和风险偏好的更为一般的组合证券资产选择模糊最优化模型。给出了最优投资比例的计算公式。并研究了以风险偏好，固定利率为参数的组合证券的有效边界的变动。最后以释例说明了方法的应用。

关键词：组合证券资产选择模糊最优模型金融

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河北省高校期刊影响力与转企改制的思考

中国科技期刊研究 2010年第5期21卷 590-596页

作者：王士忠张士莹冯民河北科技大学学报编辑部 050018

面对新闻出版领域体制改革进入决胜年以及河北省作为全国两个改革试点省份之一的严峻态势,河北省高校期刊面临着出版体制改革、办刊模式创新的艰巨任务。从河北省高校期刊的出版体制以及不容乐观的期刊影响力现状出发,探讨了高校期刊尤... 详细信息

面对新闻出版领域体制改革进入决胜年以及河北省作为全国两个改革试点省份之一的严峻态势,河北省高校期刊面临着出版体制改革、办刊模式创新的艰巨任务。从河北省高校期刊的出版体制以及不容乐观的期刊影响力现状出发,探讨了高校期刊尤其是大学学报所处的位置以及在管理体制和运行机制等方面存在的突出问題,指出了改革对高校期刊提高影响力、实现良性发展的重要性和必要性,强调了高校期刊在转企改制过程中应遵从期刊定位,不能搞"一刀切",提出了有建设性的实施举措。

关键词：高校期刊改革影响力转企改制河北省

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从制药厂废水中提取草酸的工艺研究

现代化工 2000年第7期20卷 40-42页

作者：杨久义赵风清张士莹河北科技大学石家庄050018 河北石化研究院石家庄050051

通过正交实验 ,找出了提取草酸的优化操作工艺条件 :沉淀剂的加入过量系数为 1 2～ 1 3 ,反应终点pH值 3～ 4 ,反应时间 30min ,反应温度 50℃。中试工业化实验中草酸的提取率达 90 %以上 ,所得到的草酸的质量达到GB1 62 6 -

关键词：提取工艺制药厂废水处理乙酸

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野生植物珊瑚姜抗真菌研究及临床疗效观察

中华皮肤科杂志 1989年第2期22卷 103-105页

作者：曹煜张士英等贵阳医学院皮肤病学教研室

野生植物珊瑚姜(Zingiber Corallinum Hance)的挥发油具有强烈抗真菌作用,对细艺亦有一定抑制作用.为了探索其有效成份、抗菌机制及临床疗效,作者进行了一系列研究,兹将初步研究结果报告如下.

关键词：野生植物珊瑚姜抗真菌作用疗效治疗

Environmental Threshold of Phosphorus Infiltration in Red Soil under Different Land Use Patterns

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Journal of Geoscience and Environment Protection 2021年第8期9卷 82-95页

作者： Chunyu Dong Haoyu Yang shiying zhang Hong Deng Hongjiao Xu Yunsheng Xia Youbo Su Xinxing Dong Naiming zhang Li Bao Yunnan Agricultural University Kunming China Yunnan Laboratory of Improvement of Soil Fertility and Pollution Remediation Kunming China

The risk of soil phosphorus leaching increases in basin regions in light of large-scale use of phosphorus fertilizers because of agricultural modernization. In this study, we conducted an earth pillar simulation test on the infiltration threshold of red soil, Vaseline-coated PVC pipe, intact soil core, fine sand, and nylon filter was used for Penetration test, which covers the largest area of the Dianchi Lake Basin in China. Results showed that: 1) The contents of the total available phosphorus in algae (NaOH-P) and dissolved labile phosphorus (CaCl2-P) in red soil were consistent with the content of available phosphorus (Olsen-P) under different use patterns manifested by the law of greenhouse > open field > grassland. Grassland had the highest phosphorus sorption index (PSI), followed by the greenhouse and then by the open field. 2) The leachate under the same use pattern had the characteristics of total phosphorus (TP) > particle phosphorus (PP) > total dissolved phosphorus (TDP) > dissolved organic phosphorus (DOP) > molybdate reactive phosphorus (MRP). The TP contents in the leachates of grassland, greenhouse, and open field were 0.46, 0.61, and 0.49 mg/L, respectively. DOP, TDP, PP, and MRP had similar contents, and their distributions in the three land types were consistent with that of TP. 3) Olsen-P had a significant correlation with TP, TDP, PP, and DOP in the leachates. Olsen-P of 50 slightly influenced eutrophication. Moreover, Olsen-P of >40 and 40 had minimal influence on the environment. Olsen-P of >70.90 mg/kg and PSI of <30 significantly influenced eutrophication in Dianch

关键词： Environmental Threshold Leachate Phosphorus Red Soil

CD97 inhibits osteoclast differentiation via Rap1a/ERK pathway under compression

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International Journal of Oral Science 2024年第1期16卷 134-144页

作者： Xuan Zhou Xinjia Cai Fengyang Jing Xuefen Li Jianyun zhang Heyu zhang Tiejun Li Department of Oral Pathology Peking University School and Hospital of Stomatology&National Center of Stomatology&National Clinical Research Center for Oral Diseases&National Engineering Laboratory for Digital and Material Technology of Stomatology&Beijing Key Laboratory of Digital Stomatology&Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health&NMPA Key Laboratory for Dental MaterialsBeijingChina Research Unit of Precision Pathologic Diagnosis in Tumors of the Oral and Maxillofacial Regions Chinese Academy of Medical Sciences(2019RU034)BeijingChina Central Laboratory Peking University School and Hospital of StomatologyBeijingChina

Acceleration of tooth movement during orthodontic treatment is challenging, with osteoclast-mediated bone resorption on the compressive side being the rate-limiting step. Recent studies have demonstrated that mechanoreceptors on the surface of monocytes/macrophages, especially adhesion G protein-coupled receptors (aGPCRs), play important roles in force ***, its role in the regulation of osteoclast differentiation remains unclear. Herein, through single-cell analysis, we revealed that CD97, a novel mechanosensitive aGPCR, was expressed in macrophages. Compression upregulated CD97 expression and inhibited osteoclast differentiation;while knockdown of CD97 partially rescued osteoclast differentiation. It suggests that CD97 may be an important mechanosensitive receptor during osteoclast differentiation. RNA sequencing analysis showed that the Rap1a/ERK signalling pathway mediates the effects of CD97 on osteoclast differentiation under compression. Consistently, we clarified that administration of the Rap1a inhibitor GGTI298 increased osteoclast activity, thereby accelerating tooth movement. In conclusion,our results indicate that CD97 suppresses osteoclast differentiation through the Rap1a/ERK signalling pathway under orthodontic compressive force.

关键词： CD97 osteoclast inhibited

物流业与环保信息服务业在推行循环经济中的作用及实现途径

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科学管理研究 2005年第4期23卷 33-36页

作者：徐瑾张世英天津大学管理学院天津300072

发展循环经济是减少高消耗、高污染,实现可持续发展的有效途径。而要大力推行循环经济,就要发展物流业和环保服务业。文章介绍了物流业和环保服务业的现状及其在发展循环经济中所起的至关重要的作用。最后,文章指出大力发展物流业和环... 详细信息

发展循环经济是减少高消耗、高污染,实现可持续发展的有效途径。而要大力推行循环经济,就要发展物流业和环保服务业。文章介绍了物流业和环保服务业的现状及其在发展循环经济中所起的至关重要的作用。最后,文章指出大力发展物流业和环保服务业的几种途径。

关键词：循环经济物流环保服务生态工业园生态链

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老年多器官功能衰竭与急性肾功能衰竭

中国老年学杂志 2000年第2期20卷 87-88页

作者：李宓姚伦张士英暨南大学医学院第三附属医院珠海519000 吉林省人民医院肾内科

目的　探讨老年急性肾衰 (ARF)与多器官功能衰竭 (MOSE)的临床特点、治疗及转归。方法　 67例 MOSE合并 ARF患者 ,老年组 33例 ,青壮年组 34例 ,对比分析两组患者的病因、临床经过、治疗及转归。结果　老年组由肾实质疾病引起的肾性 ARF... 详细信息

目的　探讨老年急性肾衰 (ARF)与多器官功能衰竭 (MOSE)的临床特点、治疗及转归。方法　 67例 MOSE合并 ARF患者 ,老年组 33例 ,青壮年组 34例 ,对比分析两组患者的病因、临床经过、治疗及转归。结果　老年组由肾实质疾病引起的肾性 ARF占3.0 % ,而青壮年组占 32 .3% ;单纯 ARF老年组病死率 2 5.0 % ,青壮年组 1 1 .1 % ;3个脏器衰竭老年组死亡率 63.6% ,青壮年组 32 .3% ;5个脏器衰竭者均死亡。早期使用 CAVH治疗 ,老年组治疗好转率 39.0 % ,青壮年组 69.0 %。结论　老年组与青壮年组比较由肾实质疾病引起的 ARF明显减少 ,老年组病死率明显高于青壮年组 ,并且随着衰竭器官增多死亡率增高。老年组治愈好转率较青壮年组低 ,治疗中应早期使用 CAVH。

关键词：老年人肾功能衰竭多器官功能衰竭病因治疗

Virus-Host Interactions Drive Contrasting Bacterial Diel Dynamics in the Ocean

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Research 2024年第2期6卷 389-399页

作者： Xiaowei Chen Chen Hu Wei Wei Yunlan Yang Markus G.Weinbauer Hongbo Li shiying Ren Ruije Ma YVibin Huang Tingwei Luo Nianzhi Jiao Rui zhang State Key Laboratory of Marine Environmental Science College of Ocean and Earth SciencesFujian Key Laboratory of Marine Carbon SequestrationXiamen UniversityXiamen 361102PR China College of the Environment and Ecology Xiamen UniversityXiamen 361102PR China Research Center for Environmental Ecology and Engineering School of Environmental Ecology and Biological EngineeringWuhan Institute of TechnologyWuhan 430205PR China Sorbonne Universités UPMCUniversitéParis 06CNRSLaboratoire d'Oceanographie de Villefranche(LOV)Villefranche-sur-Mer 06230France National Marine Environmental Monitoring Center Ministry of Ecological EnvironmentDalian 116023PR China Department of Ocean Sciences University of CaliforniaSanta CruzCAUSA NOAA/OAR Pacific Marine Environmental Laboratory SeattleWAUSA Institute for Advanced Study Shenzhen UniversityShenzhen 518055PR China

Marine organisms perform a sea of diel *** diel dynamics have been shown to be driven by light,energy resources,circadian rhythms,and the coordinated coupling of photoautotrophs and heterotrophic ***,we explore the diel fluctuation of viral production and decay and their impact on the total and active bacterial community in the coastal and open seawaters of the South China *** results showed that the night-production diel pattern of lytic viral production was concurrent with the lower viral decay at night,contributing to the accumulation of the viral population size during the night for surface *** diel variations in bacterial activity,community composition,and diversity were found highly affected by viral *** was revealed by the finding that bacterial community diversity was positively correlated to lytic viral production in the euphotic zone of the open ocean but was negatively related to lysogenic viral production in the coastal *** distinct but contrasting correlations suggest that viral life strategies can not only contribute to diversifying bacterial community but also potentially piggyback their host to dominate bacterial community,suggesting the tightly synchronized depth-dependent and habitat-specific diel patterns of virus-host *** further implies that viruses serve as an ecologically important driver of bacterial diel dynamics across the ocean,highlighting the viral roles in bacterial ecological and biogeochemical processes in the ocean.

关键词： coastal ocean Marine