检索结果-南通市图书馆

Effects of Different Organic Residues on Rice Yield and Soil Quality

Journal of Mountain Science 2012年第5期9卷 715-722页

作者： PENG li liU Wei SU Chunjiang li ping fang Yan WANG Xiaolan SUN lian Institute of Mountain Hazards and Environment Chinese Academy of SciencesNo.9.Section 4South Renmin RoadChina Graduate University of Chinese Academy of Sciences Beijing 100049China Institute of Horticulture Sichuan Academy of Agricultural SciencesChengdu 610066China Key Laboratory of Horticultural Crops Biology and Germplasm Enhancement in Southwest Regions Ministry of AgricultureChengdu 61oo66China Southwest Jiaotong University Chengdu 610031China Sichuan Technology and Business Collage Dujiangyan 611844China Sichuan Provincial Environmental Information Center Chengdu 610015China

Calcaric regosols are a valuable land resource, distributed widely across western China. Soil quality has deteriorated considerably in recent years owing to the blind pursuit of economic benefits. A 2-year field experiment was carried out to evaluate the effects of using spent mushroom compost, leguminous plant (Vicia sepium L.) compost, and a combination of the two (at a 1:1 and 2:1 ratio), on rice yield and soil quality in a suburb of China. Vicia sepium L. composted with spent mushroom compost at a 1:1 ratio produced the highest grain and stover yield, grain and stover phosphorus concentration, and phosphorus uptake of rice; they were 56.5%, 93.2%, 89.3%, 198.6% and 22.2% greater than control soil, respectively. The 2:1 ratio (Vicia sepium L.: spent mushroom compost) produced the highest grain N concentration, stover N concentration, and N uptake; they were 31.6%, 31.4%, and 40.7% higher than control, respectively. Soil physical, chemical, and environmental properties were improved with the application of Vicia sepium L. composted with spent mushroom compost at a 2:1 ratio. In particular, soil water-stable aggregates, organic carbon, particulate organic carbon, total nitrogen, available potassium, and cation exchange capacity increased, whereas bulk density, pH, and phytoavailable heavy metals decreased. This organic treatment is beneficial to improve soil quality indicators, and contribute to soil restoration.

关键词： Co-composting Leguminous plants Soilquality indicators Soil restoration Spent mushroomcompost

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

冠心病合并重度颈动脉狭窄的血运重建

引用

中国现代神经疾病杂志 2024年第1期24卷 22-26页

作者：杨寅房庆瑞王联群李军山许洋郭志刚天津大学胸科医院心血管外科、天津市心血管病研究所、天津市心血管急危重症重点实验室 300222

动脉粥样硬化是临床常见的慢性系统性血管病变,可引起冠心病和颈动脉狭窄,二者常共病且互为血运重建手术后并发症的重要危险因素,如何选择血运重建策略尚未达成共识。本文综述冠心病合并颈动脉狭窄的流行病学和血运重建策略,以为共病的... 详细信息

动脉粥样硬化是临床常见的慢性系统性血管病变,可引起冠心病和颈动脉狭窄,二者常共病且互为血运重建手术后并发症的重要危险因素,如何选择血运重建策略尚未达成共识。本文综述冠心病合并颈动脉狭窄的流行病学和血运重建策略,以为共病的有效治疗提供理论依据。

关键词：冠心病颈动脉狭窄血流动力学综述

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

深部煤层地下煤气化原位点火的CFD模拟

引用

煤炭学报 2024年第5期49卷 2490-2497页

作者：张友军肖逸张正张浩宇郝军吕敏方灿邹仁杰罗光前李显姚洪中石油江汉机械研究所有限公司湖北武汉430021 华中科技大学煤燃烧国家重点实验室湖北武汉430071 深圳华中科技大学研究院广东深圳518000

地下煤气化(Underground Coal Gasification,UCG)作为一种新型采煤技术受到了广泛的关注,但UCG的实验成本较高,在开展UCG实验之前应当对煤层的演变机理进行深入的探究。计算流体力学(Calculated Fluid Dynamics,CFD)可以凭借计算机强大... 详细信息

地下煤气化(Underground Coal Gasification,UCG)作为一种新型采煤技术受到了广泛的关注,但UCG的实验成本较高,在开展UCG实验之前应当对煤层的演变机理进行深入的探究。计算流体力学(Calculated Fluid Dynamics,CFD)可以凭借计算机强大的计算能力,以较为低廉的成本模拟UCG的生产过程。采用Ansys公司开发的CFD软件Fluent模拟了1000 K烟气加热下深部煤层的原位加热着火过程,重点分析了温度、氧气摩尔分数和孔隙度的变化。结果表明,泵入500 s的1000 K烟气不足以点燃煤层,1000 s的烟气加热时间足以点燃煤层,该结果在时间上与劳伦斯实验室的点火时间相当。在煤层内表面,高温主要集中在靠近入口0~0.6 m内的煤层。着火前的最高温度低于加热烟气入口温度1000 K,而着火后的最高温度超过1000 K,最高温度约1250 K。O_(2)在高温区几乎全部消耗,而在其他温度较低的区域,到达煤层内表面的氧气摩尔分数不到2%。高温区孔隙度迅速增长,在1000 s时部分煤层孔隙度可达0.9左右。在煤层内部,煤层越厚,温度上升越低。在1000 s和2000 s时,7 cm线上煤层的最高温度仅为500 K左右,远低于相同加热时间下煤层内表面的最高温度。在2000 s的点火过程中,渗入7 cm和14 cm煤层中的氧气较少,内部煤层孔隙度均在0.4以下。较低的孔隙度是由较低的温度和较低的氧气摩尔分数共同造成的。对温度、氧气摩尔分数和孔隙度的模拟可为如何促进煤层内部的反应提供参考。

关键词：地下煤气化 CFD模拟点火温度氧气孔隙度

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Phase transformation-induced Mg isotope fractionation in Mgmediated CaCO_(3)mineralization

引用

Nano Research 2023年第2期16卷 3597-3602页

作者： Yi-Ming Ju fang Huang Xin Ding li-Bo Mao Shu-Hong Yu Department of Chemistry Institute of Biomimetic Materials&ChemistryAnhui Engineering Laboratory of Biomimetic MaterialsDivision of Nanomaterials&ChemistryHefei National Research Center for Physical Sciences at the MicroscaleUniversity of Science and Technology of ChinaHefei 230026China CAS Key Laboratory of Crust-Mantle Materials and Environments School of Earth and Space SciencesUniversity of Science and Technology of ChinaHefei 230026China CAS Center for Excellence in Comparative Planetology University of Science and Technology of ChinaHefei 230026China

The biomineralization of CaCO_(3)often involves the transformation of amorphous precursors into crystalline phases,which is regulated by various proteins and inorganic ions such as Mg^(2+)*** the effects of Mg^(2+)ions on the polymorph and shape of the crystalline CaCO_(3)have been observed and studied,the interplay between Mg^(2+)ions and CaCO_(3)during the mineralization remains *** work focuses on the mechanism of Mg^(2+)ion-regulated mineralization of CaCO_(3).By tracing the Mg isotope fractionation,the different mineralization pathways of CaCO_(3)under different Mg^(2+)ion concentrations had been *** regulatory role of Mg^(2+)ions at the different stages of mineralization had been proposed through combining the fractionation data with the analyses of the CaCO_(3)polymorph and shape *** results provide a clear view of the Mg-mediated crystallization process of amorphous CaCO_(3),which can be used to finely control the phase of the crystalline products according to different needs.

关键词： mineralization calcium carbonate magnesium isotope fractionation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Surface engineering towards high-energy carbon cathode for advanced aqueous zinc-ion hybrid capacitors

引用

中国化学快报:英文版 2023年第8期34卷 356-359页

作者： Xingyuan Gao Huilin Deng Yuanbin fang Yuyan li Xihong Lu Faculty of Chemistry and Material Science Guangdong University of EducationEngineering Technology Development Center of Advanced Materials&Energy Saving and Emission Reduction in Guangdong Colleges and UniversitiesGuangzhou 510303China MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry The Key Lab of Low-carbon Chem&Energy Conservation of Guangdong ProvinceSchool of ChemistrySun Yat-sen UniversityGuangzhou 510275China

Opportunities coexist with challenges for the development of carbon-based cathodes with a high energy density applied for zinc ion hybrid capacitors(ZIHCs).In the present study,a facile and effective surface engineering approach is demonstrated to greatly improve the energy storage ability of commercial carbon paper(CP)in *** from the introduced oxygen functional groups,larger surface area and improved surface wettability upon air calcination,the assembled aqueous ZIHC with the functionalized carbon paper(FCP)exhibits a much higher areal capacity of 0.22 mAh/cm^(2)at 1 mA/cm^(2),outperforming the counterpart with blank CP by over 5000 *** importantly,a superior energy density and power density of 130.8μWh/cm^(2)and 7460.5μW/cm^(2),are respectively ***,more than 90%of the initial capacity is retained over 10000 *** surface engineering strategy to improve the energy storage capability is potentially applicable to developing a wide range of high-energy carbon electrode materials.

关键词： Zinc ion hybrid capacitor Carbon cathode Air activation Pseudocapacitance Surface engineering

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

认知行为疗法对学龄期注意缺陷多动障碍患儿干预效果分析

引用

临床心身疾病杂志 2024年第5期30卷 143-146页

作者：张志敏方晓霞李芳张越洋茹运新新乡市中心医院河南新乡453000 新乡医学院第一附属医院河南卫辉453100

目的探讨认知行为疗法(CBT)对学龄期注意缺陷多动障碍(ADHD)患儿的干预效果。方法将72例学龄期ADHD患儿按随机数字表法分为观察组和对照组,各36例。对照组患儿给予药物治疗、常规护理及心理干预,观察组患儿在对照组基础上给予CBT干预。... 详细信息

目的探讨认知行为疗法(CBT)对学龄期注意缺陷多动障碍(ADHD)患儿的干预效果。方法将72例学龄期ADHD患儿按随机数字表法分为观察组和对照组,各36例。对照组患儿给予药物治疗、常规护理及心理干预,观察组患儿在对照组基础上给予CBT干预。在干预前后应用儿童社交焦虑量表(SASC)、中文版SNAP-IV量表、社交反应量表(SRS)进行效果评价。结果干预后,两组患儿SASC和SRS评分均较干预前降低,且观察组低于对照组(P<0.01);观察组患儿SNAP-IV评分较干预前降低,且低于对照组(P<0.01)。结论CBT可缓解ADHD患儿社交焦虑程度和核心症状,提高社交能力,可为临床干预提供借鉴价值。

关键词：注意缺陷多动障碍认知行为疗法学龄期社交焦虑

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

An Isomerism Learning Model to Solve Time-Varying Problems Through Intelligent Collaboration

引用

IEEE/CAA Journal of Automatica Sinica 2023年第8期10卷 1772-1774页

作者： Zhihao Hao Guancheng Wang Bob Zhang Leyuan fang Haisheng li the Department of Computer and Information Science University of MacaoMacao 999078China the School of Data Science the Chinese University of Hong KongShenzhen 518172 Shenzhen Institute of Artificial Intelligence and Robotics for Society Shenzhen 518000 China Industrial Control Systems Cyber Emergency Response Team Beijing 100040China IEEE the College of Electrical and Information Engineering Hunan UniversityChangsha 410082 the Peng Cheng Laboratory Shenzhen 518000China the Beijing Key Laboratory of Big Data Technology for Food Safety Beijing Technology and Business UniversityBeijing 100048 the School of Computer Science and Engineering Beijing Technology and Business UniversityBeijing 100048China

Dear Editor,This letter deals with a solution for time-varying problems using an intelligent computational(IC)algorithm driven by a novel decentralized machine learning approach called isomerism *** order to meet the challenges of the model’s privacy and security brought by traditional centralized learning models,a private permissioned blockchain is utilized to decentralize the model in order to achieve an effective coordination,thereby ensuring the credibility of the overall model without exposing the specific parameters and solution process.

关键词： ism thereby letter

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

毛兰素对多囊卵巢综合征大鼠卵巢颗粒细胞凋亡的影响及机制

引用

中国药房 2024年第11期35卷 1339-1344页

作者：房丽娜李妍仪董超许丽丽史兆松李越东杨波许再超承德市中心医院生殖医学科河北承德067000

目的探究毛兰素(ERI)对多囊卵巢综合征(PCOS)大鼠卵巢颗粒细胞凋亡的影响及机制。方法通过皮下注射脱氢表雄酮构建PCOS大鼠模型,将造模成功的大鼠随机分为PCOS组,ERI低、中、高剂量组(10、20、40 mg/kg)和ERI高剂量+维替泊芬组(40 mg/... 详细信息

目的探究毛兰素(ERI)对多囊卵巢综合征(PCOS)大鼠卵巢颗粒细胞凋亡的影响及机制。方法通过皮下注射脱氢表雄酮构建PCOS大鼠模型,将造模成功的大鼠随机分为PCOS组,ERI低、中、高剂量组(10、20、40 mg/kg)和ERI高剂量+维替泊芬组(40 mg/kg ERI+10 mg/kg维替泊芬),每组10只;另取10只正常大鼠作为正常组。各给药组大鼠灌胃相应剂量的ERI和/或腹腔注射维替泊芬,PCOS组和正常组大鼠灌胃等体积的1%二甲基亚砜,每日1次,连续6周。给药结束后,检测各组大鼠体重和空腹血糖(FPG),血清中雌二醇(E2)、睾酮(T)、卵泡刺激素(FSH)、黄体生成素(LH)水平,观察卵巢组织形态学变化,分析卵巢组织细胞凋亡情况,检测卵巢组织中凋亡相关蛋白[B细胞淋巴瘤2(Bcl-2)、Bcl-2相关X蛋白(Bax)、胱天蛋白酶3(Caspase-3)]和HippoYAP信号通路相关蛋白[大肿瘤抑制激酶1(LATS1)、磷酸化LATS1(p-LATS1)、Yes相关蛋白(YAP)、磷酸化YAP(p-YAP)、转录共激活子因子PDZ结合基序(TAZ)]表达水平。结果与PCOS组比较,ERI低、中、高剂量组大鼠卵巢多囊特征减轻,闭锁卵泡数量减少,颗粒细胞层增厚,体重、FPG水平、T水平、LH水平、LH/FSH、囊性卵泡数量、细胞凋亡指数和Bax、Caspase-3、p-LATS1、pYAP蛋白表达水平均显著降低或减少(P<0.05),黄体数量、E2水平和Bcl-2、LATS1、YAP、TAZ蛋白表达水平均显著升高或增多(P<0.05)。与ERI高剂量组比较,ERI高剂量+维替泊芬组大鼠的上述指标变化均被抑制(P<0.05)。结论 ERI能促进PCOS大鼠卵巢颗粒细胞增殖,调节性激素水平,其作用机制可能与抑制Hippo-YAP信号通路有关。

关键词：毛兰素颗粒细胞多囊卵巢综合征 Hippo-YAP信号通路卵巢功能性激素

来源：

维普期刊数据库博看期刊

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Crevice Corrosion of Several Supper Stainless Steels in the Simulated LT-MED Environment

引用

Acta Metallurgica Sinica(English Letters) 2018年第11期31卷 1137-1147页

作者： Chang-Gang Wang Xiao-fang li Jie Wei Xin Wei fang Xue Rong-Yao Ma Jun-Hua Dong Wei Ke Institute of Metal Research Chinese Academy of Sciences

Susceptibility and morphological characteristics of crevice corrosion for SS316, SS904L, SS254sMo and SS2507 in thesimulated low-temperature multi-effect distillation environment were investigated by cyclic polarization test, scanningelectron microscope and laser microscope. The results show that the crevice corrosion resistance of four kinds of stainlesssteel is ranked as SS254sMo ≈ SS2507 〉 SS316 〉 SS904L. There are ＂cover＂ structures over the edge of active crevicecorrosion regions of SS904L, SS254sMo and SS2507, but SS316 is an exception. Galvanic corrosion characteristicsappeared in the crevice of duplex supper stainless steel SS2507.

关键词： Supper austenite stainless steel Super duplex stainless steel Low-temperature multi-effect distillation (LT-MED) Crevice corrosion "Cover" structure

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Design and Synthesis of Al_(7)Ni_(2) Heterometallic Clusters Based on Metal Substitution and ligands Protection Strategies

引用

Chinese Journal of Chemistry 2023年第5期41卷 521-526页

作者： Ya-Jie liu li-Min Cui Wei-Hui fang Jian Zhang State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhouFujian 350002China University of Chinese Academy of Sciences Beijing 100049China

The synthesis of heterometallic aluminum-based materials is challenging yet attractive,due to their potential applications in optics,catalysis,magnetism and semiconductor *** have now successfully synthesized two Al,Niz heterometallic clusters bearing different peripheral alkoxide ligands through a heterometal substitution strategy.

关键词： Cluster compounds Heterometallic complexes Crystal engineering Catalytic properties Aluminum oxo cluster Aluminum

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：