检索结果-南通市图书馆

基于混合整数线性规划的浓密脱水过程协调优化

在线全文

学校读者我要写书评

暂无评论

控制与决策 2024年第4期39卷 1281-1287页

作者：贾润达李志奇张树磊何大阔李康王福利东北大学信息科学与工程学院沈阳110819 东北大学流程工业综合自动化国家重点实验室沈阳110819 矿冶科技集团有限公司矿冶过程自动控制技术国家重点实验室北京100160

浓密脱水过程是有色金属选冶领域重要的固液分离工序.但由于该过程关键变量难以在线检测、生产设备间相互耦合以及人工经验操作等问题,导致其能耗较高、过程安全性难以保证.对此,以浓密脱水过程为背景,构建一种基于混合整数线性规划的... 详细信息

浓密脱水过程是有色金属选冶领域重要的固液分离工序.但由于该过程关键变量难以在线检测、生产设备间相互耦合以及人工经验操作等问题,导致其能耗较高、过程安全性难以保证.对此,以浓密脱水过程为背景,构建一种基于混合整数线性规划的协调优化模型.利用工业现场的历史数据,建立底流浓度预测模型以及底流泵与压滤泵运行时间预测模型;在考虑阶梯电价的条件下,以最小化生产过程能耗为目标,以生产工艺条件、设备安全等为约束条件,建立浓密脱水过程的协调优化模型;通过引入辅助决策变量,对优化模型进行线性化处理,将复杂的非线性过程问题转化为更易于求解的混合整数线性规划问题.最后,将所提出的方法应用于某选矿厂的浓密脱水过程,结果显示,平均放矿底流浓度可以提高13.5%,能耗经济指标降低46.8%.

关键词：浓密脱水过程预测模型协调优化阶梯电价混合整数线性规划能耗经济指标

4种改良剂对酸性紫色土肥力及活性有机碳组分的影响

在线全文

学校读者我要写书评

暂无评论

环境科学 2024年第3期45卷 1655-1664页

作者：丁馨茹严宁珍王子芳李志琦黄容王洋代文才高明西南大学资源环境学院重庆400715 重庆市江津区农业技术推广中心重庆402260 四川农业大学资源学院成都611130

探究4种改良剂施用对酸性紫色土土壤肥力及活性碳组分特征影响,为紫色土养分管理及稳固碳库提供科学依据.采用田间试验,设置不施肥(CK)、单施化肥(F)、石灰+化肥(SF)、有机肥+化肥(OM)、生物炭+化肥(BF)及酒糟灰渣+化肥(JZ)这6个处理,... 详细信息

探究4种改良剂施用对酸性紫色土土壤肥力及活性碳组分特征影响,为紫色土养分管理及稳固碳库提供科学依据.采用田间试验,设置不施肥(CK)、单施化肥(F)、石灰+化肥(SF)、有机肥+化肥(OM)、生物炭+化肥(BF)及酒糟灰渣+化肥(JZ)这6个处理,研究不同处理土壤有机质、 pH、速效养分、土壤综合肥力指数(IFI)、溶解性有机碳(DOC)、微生物量碳(MBC)、颗粒有机碳(POC)含量及各组分有效率和土壤碳库管理指数(CPMI),阐明其相互关系.结果表明:(1)施用改良剂显著提高了土壤pH及有机质、碱解氮、速效磷、速效钾含量(PpH(11.7%)>AK(6.5%).酸性紫色土施用酒糟灰渣和有机肥提高土壤肥力和改良土壤质量效果最显著,同时有利于促进土壤碳组分的积累和活化.

关键词：改良剂紫色土活性碳组分综合肥力指数(IFI) 碳库管理指数(CPMI)

Upregulated CD133 expression in tumorigenesis of colon cancer cells

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2011年第7期17卷 932-937页

作者： zhi-li Yang qi Zheng Jun Yan Ye Pan zhi-Gang Wang Department of Surgery Affiliated Sixth People's Hospital ofShanghai Jiao Tong University Shanghai 200233 China

AIM: To analyze the upregulated CD133 expression in tumorigenesis of primary colon cancer cells. METHODS: Upregulated CD133 expression in tumorigenesis of colorectal cancer cell lines (Lovo, Colo205, Caco-2, HCT116 and SW620) was analyzed by flow cytometry. Human colon cancer tissue samples were stained with anti-human CD133. SW620 cells were sorted according to the CD133 expression level measured by fluorescence-activated cell sorting. Spheroids of colorectal cancer cells were cultured with the hanging drop. Expression of CD133 and Lgr5 in spheroids of colorectal cancer cells and monolayer culture was detected by RT-qPCR. Spheroids of colorectal cancer cells were analyzed using anti-human CD133 with immunohistochemical staining. RESULTS: CD133 antigen was expressed in colorectal cancer cell lines (Lovo, Colo205, Caco-2, HCT116 and SW620) as well as in primary and metastatic human colon cancer tissues. However, the CD133 was differently expressed in these cell lines and tissues. The expression levels of CD133 and Lgr5 were significantly higher in spheroids of parental, CD133hi and CD133-cells than in their monolayer culture at the mRNA level (P lines. CONCLUSION: Upregulated CD133 expression plays a role in tumorigenesis colorectal cancer cells, which may promote the expression of other critical genes that can drive tumorigenesis.

关键词： CD133 Colon cancer cells Tumorigenesis Cancer stem cells

4种改良剂对紫色土Cd生物有效性及土壤酶活性的影响

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

环境科学 2024年第6期45卷 3523-3532页

作者：丁馨茹徐曼严宁珍王子芳李志琦黄容王洋代文才高明西南大学资源环境学院重庆400715 重庆市江津区农业技术推广中心重庆402260 四川农业大学资源学院成都611130

探究4种改良剂施用对酸性花椒园土壤有效Cd和花椒各部位Cd含量及土壤酶活性的影响,为紫色土酸化改良及重金属污染治理提供科学依据.采用田间试验,设置不施肥(CK)、单施化肥(F)、石灰+化肥(SF)、有机肥+化肥(OM)、生物炭+化肥(BF)和酒糟... 详细信息

探究4种改良剂施用对酸性花椒园土壤有效Cd和花椒各部位Cd含量及土壤酶活性的影响,为紫色土酸化改良及重金属污染治理提供科学依据.采用田间试验,设置不施肥(CK)、单施化肥(F)、石灰+化肥(SF)、有机肥+化肥(OM)、生物炭+化肥(BF)和酒糟灰渣+化肥(JZ)这6个处理,研究不同处理土壤pH、有效态Cd(DTPA-Cd)、花椒枝条、叶片、椒壳、椒籽Cd含量及土壤过氧化氢酶(S-CAT)、酸性磷酸酶(S-ACP)和脲酶(S-UE)活性,阐明其相互关系.结果表明:①酒糟灰渣+化肥和石灰+化肥两处理均显著提高土壤pH(P 枝条>椒籽>椒壳,与对照相比,酒糟灰渣+化肥处理的花椒各部位富集系数降低最为显著(P <0.05),降幅为27.54%~40.0%.③改良剂处理下土壤过氧化氢酶和脲酶活性的变化规律相似,相较对照,酒糟灰渣+化肥处理对以上两种酶活性提高最为显著,分别提高了191.26%和199.50%,而酸性磷酸酶活性则降低了16.45%.相关性分析表明,土壤有效Cd含量与土壤pH值呈极显著负相关(P <0.01),过氧化氢酶和脲酶活性与土壤pH呈极显著正相关(P <0.01),与土壤有效Cd含量呈极显著负相关(P <0.01),酸性磷酸酶则完全相反.酸性紫色土壤施用石灰、酒糟灰渣中和土壤酸度效果最显著,在降低土壤有效Cd含量、改善土壤环境的同时,抑制花椒各部位对Cd的吸收和转运,是改良酸性紫色土及防治重金属污染的有效措施.

关键词：改良剂酸性土镉(Cd) 富集系数转运系数酶活性

Japanese encephalitis following liver transplantation: A rare case report

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2020年第2期8卷 337-342页

作者： zhi-li qi li-Ying Sun Jing Bai Hai-Zhou Zhuang Mei-li Duan Department of Intensive Care Unit Beijing Friendship HospitalCapital Medical UniversityBeijing 100050China Beijing Key Laboratory of Tolerance Induction and Organ Protection in Transplantation Beijing Friendship HospitalCapital Medical UniversityBeijing 100050China

BACKGROUND Japanese encephalitis(JE) is a serious public health concern with a high mortality rate in many Asian countries. For many years, JE virus(JEV) was considered the major cause of viral encephalitis in Asia. Although most JE cases are asymptomatic, the case fatality rate approaches 30%, and approximately 30%–50% of survivors have long-term neurological sequelae. To the best of our knowledge, JEV infection has never been reported following liver *** SUMMARY We report a case of a woman who underwent liver transplantation for autoimmune liver disease but presented with fever and neurological symptoms 13 d after transplantation. Magnetic resonance imaging revealed JEV infection,and positive immunoglobulin M antibody to JEV in blood and cerebrospinal fluid confirmed JE. The patient was treated with antiviral agents, immune regulation,and organ function support. No neurological sequelae were present after 1 year of *** Imaging and lumbar puncture examination should be performed as soon as possible in patients with fever and central nervous system symptoms after liver transplantation, and the possibility of atypical infection should be considered,which is helpful for early diagnosis and improved prognosis.

关键词： liver transplantation Japanese encephalitis virus Neurological complications Infection Case report

Genome-wide identification and characterization of the abiotic-stress-responsive lipoxygenase gene family in diploid woodland strawberry(Fragaria vesca)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2022年第7期21卷 1982-1996页

作者： li zhi-qi XIE qian YAN Jia-hui CHEN Jian-qing CHEN qing-xi College of Horticulture Fujian Agriculture and Forestry UniversityFuzhou 350002P.R.China Horticultural Plant Biology and Metabolomics Center of Haixia Institute of Science and Technology Fujian Agriculture and Forestry UniversityFuzhou 350002P.R.China

lipoxygenase(LOXs)is a kind of dioxygenase without heme and iron,which plays an important role in the development and adaptation of many plants to the ***,the study of strawberry LOX gene family has not been *** this study,14 LOX genes were identified from the diploid woodland strawberry *** phylogenetic tree divides the FvLOX gene into two subfamilies:9-LOX and *** duplication event analysis showed that whole-genome duplication(WGD)/segmental duplication and dispersed duplication effectively promoted the expansion of strawberry LOX ***-PCR analysis showed that FvLOX genes were expressed in different *** profile analysis showed that FvLOX1 and FvLOX8 were up-regulated under low temperature stress,FvLOX3 and FvLOX7 were up-regulated under drought stress,FvLOX6 and FvLOX9 were up-regulated under salt stress,FvLOX2,FvLOX3 and FvLOX6 were up-regulated under salicylic acid(SA)treatment,FvLOX3,FvLOX11 and FvLOX14 were up-regulated under methyl jasmonate(MeJA)treatment,FvLOX4 and FvLOX14 were up-regulated under abscisic acid(ABA)*** analysis showed that FvLOX genes were involved in plant growth and development and stress *** analyzed and identified the whole genome of strawberry FvLOX family and characterized a variety of FvLOX candidate genes involved in abiotic stress *** study laid a theoretical and empirical foundation for the response mechanism of strawberry to abiotic stress.

关键词： lipoxygenase gene family strawberry abiotic stress expression pattern cis-acting element

Surface modification of the TiO2 particles induced by γ irradiation

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2013年第B12期24卷 33-37页

作者： li zhi qi Xiangzhi GE Xueping YANG Cunzhong FANG Bin ZHANG Weidong YANG Xiangmin Institute of Nuclear Radiation Application School of Science East China University of Science and Technology Shanghai 200237 China

The surface of anatase TiO2 was modified by maleic andydride (MAH) γ radiation. The properties of surface modified TiO2 were investigated by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT IR), X-ray photoelectron spectrum (XPS), thermal gravimetric analysis (TGA), as well as transmission electron microscopy (TEM). The results suggest that the MAH anchored on the surface of TiO2 through chemical bonding and the grafting ratio was approximately 2.7%. TEM image revealed that the modified particles had good dispersibility and compatibility with N,N-Dimethylformamide(DMF), which facilitated to hinder the aggregation of TiO2 particles. © 2013, Science Press. All rights reserved.

关键词：二氧化钛粒子表面修饰傅里叶变换红外光谱 X射线光电子能谱 N-二甲基甲酰胺 TiO2颗粒透射电子显微镜诱导

Special Issue:Dynamic Polymer Networks

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2024年第10期42卷 1401-1402页

作者： Jun-qi Sun zhi-Bo li Tao Xie 不详

The ease of processing and light weight have made polymeric materials uniquely suited for numerous general ***,realization of their switchable chain configuration/mobility and molecular design versatility has pushed p... 详细信息

关键词： uniquely realization polymeric

Review： Deregulation of microRNA expression in thyroid tumors

在线全文

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2014年第3期15卷 212-224页

作者： Zi-ming YUAN zhi-li YANG qi ZHENG Department of General Surgery Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine Shanghai 200233 China

MicroRNAs （miRNAs or miRs） are endogenous non-coding RNAs that negatively regulate gene expres- sion by binding to the 3＇ non-coding regions of target mRNAs, resulting in their cleavage or blocking their translation. miRNAs may have an impact on cell differentiation, proliferation, and survival, and their deregulation can be inclined to diseases and cancers, including thyroid tumors. The purpose of this review is to summarize the existing findings of deregulated miRNAs in different types of thyroid tumors and to exhibit their potential target genes, especially to demonstrate those involved in tumor invasion and metastasis. In addition, new findings of circulating miRNA expres- sion profiles, single nucleotide polymorphism （SNP） in thyroid tumors, and the correlation of somatic mutations with deregulated miRNA expression in thyroid tumors were all included in this review.

关键词： MicroRNA Target gene Thyroid tumor Single nucleotide polymorphism (SNP) Somatic mutation