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社会网络的农地流转租金效应

统计与信息论坛 2017年第2期32卷 122-128页

作者：常伟安徽大学中国三农问题研究中心安徽合肥230601

社会网络对农地流转租金有着重要影响。结合安徽四县区1 010位农民田野调查数据,运用稳健回归方法和农地流转租金模型,考察了社会网络对农地流转租金的影响。结果表明:准强关系对农地流转租金有着正向显著影响,而强关系、准弱关系和弱... 详细信息

社会网络对农地流转租金有着重要影响。结合安徽四县区1 010位农民田野调查数据,运用稳健回归方法和农地流转租金模型,考察了社会网络对农地流转租金的影响。结果表明:准强关系对农地流转租金有着正向显著影响,而强关系、准弱关系和弱关系均对农地流转租金有着负向影响。社会网络对于农地流转租金的影响主要表现为间接影响而非直接影响,其中准强关系对于农地流转租金有着间接正向影响,而准弱关系和弱关系对农地流转租金有着间接负向影响。

关键词：社会网络稳健回归方法农地流转租金模型租金效应

Pulse-spray catheter directed thrombolysis in patients with recent onset or deterioration of lower extremity ischemia

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Chinese Medical Journal 2012年第2期125卷 188-192页

作者： Chen Yue-xin Liu chang-wei Zeng Rong Li Yong-jun Ye wei Shao Jiang Chinese Acad Med Sci Peking Union Med Coll Hosp Dept Vasc Surg Beijing 100068 Peoples R China Peking Union Med Coll Beijing 100068 Peoples R China

Background The recent onset or deterioration of lower extremity ischemia is highly associated with intravascular *** of these thrombotic occlusions is ***-spray catheter directed thrombolysis （PS-CDT） refers to the technique of intermittent forcefully injecting the thrombolytic agent into the thrombus to fragment it and increase the surface area available for enzymatic *** study was designed to evaluate the efficacy and safety of PS-CDT in patients with recent onset or deterioration of lower extremity *** From August 2008 to March 2009,44 patients with acute or chronic lower extremity ischemia were recruited in this prospective study,which included 37 men and 7 women ranging from 15 to 83 years old （mean age （51.1±17.4） years）.PS-CDT through a multi-side-hole thrombolytic catheter by using urokinase was conducted in all *** progression of thrombolysis was assessed and graded by *** therapies were used to correct underlying *** follow-up period was 12 *** In the 44 patients,the average total dose of urokinase for each patient was （2120000±1100000） IU （median 2000000 IU）,with a median duration of lysis of 48 *** rate of initial technical success was 97.7%.The rate of clinically successful lysis was 81.8%.Early （〈30 days） and late （from 30 days to 12 months） amputation rates were both 4.5% （2/44）.The overall amputation rate was 9.1% （4/44）.No mortality was recorded during thrombolysis and follow-up period （12 months）.No major bleeding or allergic reaction was seen during thrombolytic therapy.11.4% had symptoms of distal *** primary patency rate for the arteries that were clinically successfully thrombolyzed as compared with those that failed to lysis was 83.3% vs.57.1%,respectively,at 1 *** PS-CDT,combined with adjunctive therapies,is associated with good safety and efficacy in recent-onset or deterioration of lower extremity ***

关键词： therapeutic thrombolysis peripheral arterial disease thrombosis ischemia lower extremity

Glycopeptide ligation via direct aminolysis of selenoester

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Chinese Chemical Letters 2018年第7期29卷 1127-1130页

作者： Jing-Jing Du Ling-Ming Xin Ze Lei Shi-Yao Zou Wen-Bo Xu chang-wei Wang Lian Zhang Xiao-Fei Gao Jun Guo Key Laboratory of Pesticide & Chemical Biology of Ministry of Education Hubei International Scientific and Technological Cooperation Base of Pesticide and Green SynthesisCollege of ChemistryCentral China Normal University Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation East China University of Technology

Direct aminolysis of selenoester in aqueous media was investigated as a glycopeptide ligation *** strategy allows the peptide and glycopeptide ligation to proceed smoothly(even with hindered amino acids) without the need of cysteine residue, N-terminal thiol auxiliary or coupling additive, and to afford the corresponding amide products in excellent yields. No epimerization was observed during ligation reations. In this work, the selenoester of unprotected glycopeptide was readily prepared, and the direct aminolysis of glycopeptide selenoester was successfully applied to synthesize MUC1 mucin sequence efficiently.

关键词： Glycolpeptide Aminolysis Selenoester Additive-free MUC1 mucin

Effect of impurities on desulfurization properties of limestone during coal gasification

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Journal of Environmental Sciences 1998年第4期10卷 102-107页

作者： chang Li ping, Zhu Su yu, Xie Ke chang, Bao wei ren Laboratory of Coal Conversion Science, Taiyuan University of Technology, Taiyuan 030024, China

In order to understand the function of calcium based sorbents on desulfurization during coal gasification and the effect of impurities on it, a series of tests using three different limestones and four kinds of different sodium salts and four kinds different chlorides were conducted by X ray diffraction and X ray photoelectron spectroscopy techniques. The structure of precursory compounds and pretreatment materials were examined by XRD. The binding energy and relative contents of sulfur, calcium and carbon, which exist in different forms in the residues after coal gasification, were measured by means of XPS. The existing forms of sulfur and calcium vary with impurities in limestone. Sodium or chloride play a promotive role on limestone desulfurization, but this promotion is affected by the chemical environment.

关键词： coal gasification in bed desulfurization calcium based sorbent additive.

Negative inductive effect enhances charge transfer driving in sulfonic acid functionalized graphitic carbon nitride with efficient visible-light photocatalytic performance

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Chinese Journal of Catalysis 2022年第2期43卷 526-535页

作者： Min Zhang Yunfeng Li wei chang wei Zhu Luohong Zhang Renxi Jin Yan Xing Xi’an Key Laboratory of Textile Chemical Engineering Auxiliaries College of Environmental and Chemical EngineeringXi’an Polytechnic UniversityXi’an 710000ShaanxiChina Department of Chemical and Biomolecular Engineering University of Notre DameIndiana 46556USA Jilin Provincial Key Laboratory of Advanced Energy Materials Department of ChemistryNortheast Normal UniversityChangchun 130024JilinChina

Efficient photogenerated carrier migration/separation plays a critical role in increasing the photocatalytic performance of g-C_(3)N_(4).Herein,sulfonic acid group-functionalized g-C_(3)N_(4)(SACN)was synthesized and then synchronously strengthened by a facile-solid-state thermal reaction of g-C_(3)N_(4)and sulfamic *** a solid strong acid,sulfamic acid can be used to achieve acid etching on the surface of g-C_(3)N_(4)with the assistance of thermal treatment,leading to an enlarged specific surface area and increased surface catalytic reaction *** importantly,our experiments and density functional theory calculations indicate that the driving force generated by the negative inductive effect of sulfonic acid groups significantly improves the charge transfer dynamics and effectively inhibits their ***,the negative inductive effect can induce charge redistribution,which reduces the conduction band potential of g-C_(3)N_(4)to enhance the reduction ability of photo-induced *** a result,the SACN-400 sample showed excellent photocatalytic performance in H2 generation with an apparent quantum efficiency of 11.03%at 420±15 nm,as well as an efficient photodegradation rate for organic pollutants.

关键词： Photocatalysis g-C_(3)N_(4) Negative inductive effect Sulfamic acid Charge transfer

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A chromosome-level reference genome of nonheading Chinese cabbage[Brassica campestris(*** rapa)***]

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Horticulture Research 2020年第1期7卷 1-13页

作者： Ying Li Gao-Feng Liu Li-Ming Ma Tong-Kun Liu chang-wei Zhang Dong Xiao Hong-Kun Zheng Fei Chen Xi-Lin Hou State Key Laboratory of Crop Genetics&Germplasm Enhancement Key Laboratory of Biology and Genetic Improvement of Horticultural Crops(East China)Ministry of Agriculture and Rural Affairs of the P.R.ChinaEngineering Research Center of Germplasm Enhancement and Utilization of Horticultural CropMinistry of Education of the P.R.ChinaCollege of HorticultureNanjing Agricultural UniversityNanjing 210095China Biomarker Technologies Corporation Beijing 101300China

Non-heading Chinese cabbage(NHCC)is an important leafy vegetable cultivated ***,we report the first high-quality,chromosome-level genome of NHCC001 based on PacBio,Hi-C,and Illumina sequencing *** assembled NHCC001 genome is 405.33 Mb in size with a contig N50 of 2.83 Mb and a scaffold N50 of 38.13 *** 53%of the assembled genome is composed of repetitive sequences,among which long terminal repeats(LTRs,20.42%of the genome)are the most *** Hi-C data,97.9%(396.83 Mb)of the sequences were assigned to 10 *** assessment showed that this *** NHCC001 genome assembly is of better quality than other currently available *** assemblies and that it contains 48,158 protein-coding genes,99.56%of which are annotated in at least one functional *** genomic analysis confirmed that *** NHCC001 underwent a whole-genome triplication(WGT)event shared with other Brassica species that occurred after the WGD events shared with *** related to ascorbic acid metabolism showed little variation among the three *** *** numbers of genes involved in glucosinolate biosynthesis and catabolism were higher in NHCC001 than in Chiifu and Z1,due primarily to tandem *** newly assembled genome will provide an important resource for research on ***,especially *** ***.

关键词： heading fir cultivated

Investigation of sex determination in starry flounder(Platichthys stellatus)reveals sex chromosome evolution in Pleuronectiformes and identifies a sex-specific marker

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Zoological Research 2024年第6期45卷 1347-1356页

作者： wei-Jing Li Yu-Man Zhang Shuo Li Yu-Yan Liu Chen Li Sheng-Lei Han Kai-Qiang Liu Lucas Benites Doretto Bing-Hua Liu Hai-Jun Huang Zhi-Long Sun Qian Wang Hong-Yan Wang chang-wei Shao State Key Laboratory of Mariculture Biobreeding and Sustainable Goods Yellow Sea Fisheries Research InstituteChinese Academy of Fishery SciencesQingdaoShandong 266071China School of Graduate Chinese Academy of Agricultural SciencesBeijing 100081China Laboratory for Marine Fisheries Science and Food Production Processes Qingdao Marine Science and Technology CenterQingdaoShandong 266237China

The identification of sex chromosomes is fundamental for exploring the mechanism and evolution of sex *** stellatus,a species exhibiting clear sexual dimorphism and homomorphic chromosome pairs,has received limited research concerning its sex determination *** the sex chromosome of *** will enhance our understanding of sex chromosome evolution in *** study employed whole-genome resequencing to investigate the sex chromosome and sex determination system in ***,Chr23 was identified as the sex chromosome in ***,with the sex-determining region(SDR)occupying 48.1%of the chromosome and featuring an XX/XY *** chromosome turnover was observed within Pleuronectiformes,with ***,Verasper variegatus,and Hippoglossus hippoglossus sharing a common ancestral *** inversions were detected within the SDR of ***,although chromosomal rearrangements between sex chromosomes and autosomes were ***,a sex-specific marker for *** was ascertained,enabling genetic sex identification,with significant implications for improving breeding programs and aquaculture practices.

关键词： Sex chromosome Platichthys stellatus Sex determination system Ancestral karyotype of Pleuronectiformes Sex-specific marker

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论网络环境下用户标注的价值与应用

图书情报工作 2008年第1期52卷 9-12页

作者：常唯中国科学院长春光学精密机械与物理研究所

对网络环境下的用户标注进行探析:从帮助检索、辅助记忆、抒发感情、引人注意、贡献他人等方面分析其形成动机,从标注者个人和外界环境两个大的方面探讨其影响因素。在此基础上,探讨标注在资源组织、异构资源整合、协同过滤和推荐等方... 详细信息

对网络环境下的用户标注进行探析:从帮助检索、辅助记忆、抒发感情、引人注意、贡献他人等方面分析其形成动机,从标注者个人和外界环境两个大的方面探讨其影响因素。在此基础上,探讨标注在资源组织、异构资源整合、协同过滤和推荐等方面的应用,进而分析其在资源创建,揭示资源内容,记录隐性知识,评价资源等方面的价值。

关键词：用户标注网络资源组织信息检索

Prediction of Cerebral Hyperperfusion Syndrome with Velocity Blood Pressure Index

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Chinese Medical Journal 2015年第12期128卷 1611-1617页

作者： Zhi-Chao Lai Bao Liu Yu Chen Leng Ni chang-wei Liu Department of Vascular Surgery Peking Union Medical College Hospital Chinese Academy of Medical Science Beijing 100730 China

Background：Cerebral hyperperfusion syndrome is an important complication of carotid endarterectomy （CEA）.An 〉 100% increase in middle cerebral artery velocity （MCAV） after CEA is used to predict the cerebral hyperperfusion syndrome （CHS） development,but the accuracy is *** increase in blood pressure （BP） after surgery is a risk factor of CHS,but no study uses it to predict *** study was to create a more precise parameter for prediction of CHS by combined the increase of MCAV and BP after ***：Systolic MCAV measured by transcranial Doppler and systematic BP were recorded preoperatively;30 min *** new parameter velocity BP index （VBI） was calculated from the postoperative increase ratios of MCAV and BE The prediction powers of VBI and the increase ratio of MCAV （velocity ratio [VR]） were compared for predicting CHS ***：Totally,6/185 cases suffered *** best-fit cut-off point of 2.0 for VBI was identified,which had 83.3% sensitivity,98.3% specificity,62.5% positive predictive value and 99.4% negative predictive value for CHS *** result is significantly better than VR （33.3%,97.2%,28.6% and 97.8%）.The area under the curve （AUC） of receiver operating characteristic：AUCvBI =0.981,95% confidence interval [CI] 0.949-0.995;AUCvR =0.935,95% CI 0.890-0.966,P =***：The new parameter VBI can more accurately predict patients at risk of CHS after *** observation needs to be validated by larger studies.

关键词： Blood Pressure Carotid Endarterectomy Cerebral Hyperperfusion Syndrome Prediction Transcranial Doppler