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算网大脑是算力网络的智能中枢，是实现算网多要素融合编排调度的关键系统，智能化是算网大脑实现和提升业务灵活、敏捷、高效编排管理与运营能力的核心。通信产业界各方在前期算网大脑产品实现的基础上，聚焦算网大脑的智能化技术引入，并对算网大脑未来智能化演进提出了较高期望。然而，当前尚未形成体系化的算网大脑智能化水平评估方法，无法较好地评估当前算网大脑产品所处智能化水平等级、可提升环节及待优化关键指标等内容。基于业界已有工作和需求分析，研究算网大脑智能化演进目标和阶段能力，提出了一种算网大脑智能化水平分级方法，包含评估对象选择、评估流程分解、约束指标考量等细化步骤，以及一套完整适配算网大脑智能化级别评估的规则，并在最后给出了具体应用示例。该方法可有效量化算网大脑系统所处的具体级别以及向下一级演进的方向与指标，为业界分级评估和系统建设提供参考。

因果关系抽取作为关系抽取的一个重要任务，近年来得到了广泛关注。现有的因果关系抽取方法大多将句法结构和背景知识割裂开进行研究，早期的因果关系抽取方法偏重于从句法结构层面进行分析，随着深度学习技术的发展，预训练模型结合背景知识的方法成为主流。然而上述两种方法均未完全融合句内信息和外部知识，带来了不同程度的信息缺失。为了解决这一问题，提出了结合句法结构和背景知识的因果关系抽取模型。该模型将句子解析为同时包含句法和知识的知识句法图结构，使用图卷积网络进行信息融合。模型同时考虑了句法和知识两部分信息，从而进一步丰富了实体嵌入，达到了良好的因果关系抽取效果。本模型在EventStoryLine数据集上取得了良好效果，F1值达到0.445，与现有方法相比提高了2.3%。

前列腺素F2α（PGF2α）具有广泛的生理活性，是一种重要的脂质介质。为了实现PGF2α的绿色生物合成，构建了pET30a-TbPGFS、pET30a-MmPGHS、pET30a-GvPGHS载体并在大肠杆菌BL21（DE3）中分别表达，同时对异丙基-β-D-硫代半乳糖苷（IPTG）诱导表达条件进行了优化以提高重组蛋白在大肠杆菌中的表达量。另外，以最佳诱导表达条件下得到的重组蛋白为催化剂，催化花生四烯酸合成PGF2α。结果表明：MmPGHS蛋白在大肠杆菌中没有表达；GvPGHS蛋白的最佳诱导表达条件为诱导剂IPTG浓度0.2 mmol/L、诱导温度30 ℃、诱导时间2 h，TbPGFS蛋白的最佳诱导表达条件为诱导剂IPTG浓度0.2 mmol/L、诱导温度30 ℃、诱导时间6 h；在最佳诱导表达条件下，由GvPGHS和TbPGFS的粗酶液构成的双酶催化未能检测到产物PGF2α，而在酶偶联化学催化时，GvPGHS能将花生四烯酸转化为PGH2，PGH2被SnCl2进一步还原为PGF2α。综上，通过体外酶促反应结合化学法可高效转化花生四烯酸生产PGF2α。As the important lipid mediators, prostaglandin F2α（PGF2α）performs a wide range of physiological activities. To achieve the green biosynthesis of PGF2α, pET30a-TbPGFS, pET30a-MmPGHS and pET30a-GvPGHS vectors were constructed and expressed in Escherichia coli BL21 (DE3), respectively, and the induction expression conditions of isopropyl-β-D-thiogalactopyranoside (IPTG) were optimized to improve the expression of the recombinant protein in E.coli. In addition, the recombinant protein obtained under the optimal conditions were used as a catalyst to catalyze the synthesis of PGF2α from arachidonic acid. The results showed that MmPGHS protein was not expressed in E. coli. However, GvPGHS protein performed the optimized expression under the conditions of IPTG concentration 0.2 mmol/L, induction temperature 30 ℃ and induction time 2 h, the TbPGFS protein performed the optimized expression under the conditions of IPTG concentration 0.2 mmol/L, induction temperature 30 ℃ and induction time 6 h. Under the above optimized conditions, PGF2α was not detected by the two-enzyme coupled catalysis system composed of crude extract of GvPGHS and TbPGFS. However, arachidonic acid was converted into PGH2 by GvPGHS, which was further reduced to PGF2α by SnCl2 under the enzyme-coupled chemical catalysis. In conclusion, In vitro enzymatic reaction combined with chemical method can efficiently convert arachidonic acid to produce PGF2α.

为了将农业生产中的废塑料和餐厨废油更好地进行资源化利用，以农业混合废塑料和餐厨废油为原料，NaY分子筛为催化剂，探究在不同的反应温度下甲醇添加量对混合废塑料和餐厨废油共催化裂解制备生物基烃类的影响。以液体产物产率、可燃气体产量、液体产物酸值、催化剂结焦率为指标，确定了混合废塑料和餐厨废油共催化裂解的最佳反应条件，同时对最佳反应条件下所得液体产物的组成进行了分析，对比了液体产物和生物柴油的理化指标，并对混合废塑料和餐厨废油共裂解反应机制进行了分析。结果表明：添加甲醇总体上有利于提高液体产物产率，降低液体产物的酸值、可燃气体产量和催化剂结焦率；混合废塑料和餐厨废油共催化裂解的最佳反应条件为反应温度440 ℃、甲醇添加量5%，在此条件下液体产物产率为78.52%，液体产物酸值（KOH）为0.59 mg/g，催化剂结焦率为6.06%；与未添加甲醇相比，添加5%的甲醇后，液体产物的组成成分中芳香烃和烯烃相对含量均降低，而烷烃相对含量显著增加；液体产物（烃类燃油）性能优于生物柴油；在添加5%甲醇条件下，混合废塑料和餐厨废油在NaY分子筛催化剂作用下可能发生协同加氢反应，促进了烷烃的生成。综上，混合废塑料和餐厨废油添加甲醇共催化裂解是制备烃类燃油的有效途径。In order to make better use of waste plastics in agricultural production, and kitchen waste oil the effects of methanol additions on the co-catalytic pyrolysis of mixed waste plastics and kitchen waste oil to prepare bio-based hydrocarbons at different reaction temperatures were investiated by using agricultural mixed waste plastics and kitchen waste oil as raw materials and NaY zeolite as catalyst. The optimum reaction conditions of co- catalytic pyrolysis of mixed waste plastics and kitchen waste oil were determined by the yield of liquid products, the yield of combustible gas, the acid value of liquid products and the coking rate of catalyst. The composition of the liquid products obtained under the optimum reaction conditions was analyzed, and the physicochemical indexes of the liquid products were compared with biodiesel. At the same time, the co-catalytic pyrolysis reaction mechanism of mixed waste plastics and kitchen waste oil was analyzed. The results showed that the addition of methanol might generally beneficial to improve the yield of liquid products, reduce the acid value of liquid products, the yield of combustible gas and the coking rate of catalyst. The optimum reaction conditions of co- catalytic pyrolysis were determined as follows: reaction temperature 440 ℃, methanol dosage 5%. Under the optimum conditions, the yield of liquid products reached 78.52%, the acid value of liquid product was reduced to 0.59 mgKOH/g, and the coking rate of catalyst was reduced to 6.06%. Compared with the absence of methanol, the relative contents of aromatic hydrocarbons and olefins in the composition of the liquid product decreased after adding 5% methanol, while the relative content of alkanes increased significantly. The performance of the liquid products (hydrocarbon fuel) was better than that of biodiesel. Adding 5% methanol might promote the generation of alkanes due to a synergistic hydrogenation reaction occuring between the mixed waste plastic and kitchen waste oil under the action of NaY zeolite catalyst. In summary, co-catalytic pyrolysis of mixed waste plastics and kitchen waste oil with methanol is an effective way to prepare hydrocarbon fuel.

Objective To investigate the factors causing delays in seeking medical attention and its relationship with short-term prognosis in patient with acute ischemic stroke, and provide reference for the interventions on seeking timely medical attention. Methods Totally 131 patients with acute ischemic stroke who attended the hospital between September 2021 and August 2022 were included. The general information and clinical data of patients were retrospectively analyzed. According to the time to medical attention, those with time to medical attention more than 3. 5 h were included as the Delay group, and those with time to medical attention less than 3. 5 h were assigned to the Non-Delay group. Results There were 74 cases in the Non-Delay group and 57 cases in the Delay group. There was no significant difference in age, gender, marital status, education level, medical insurance, employment status, current place of residence, distance to hospital, type of hospital attention, place of disease onset, time to medical attention, time of disease onset, symptoms, type of disease onset, medical history and NIHSS score at hospital admission between two groups (P＞0. 05). The type of symptom identification and NIHSS score at 14th day of hospital admission in the Non-Delay group was lower than that in the Delay group(P＜0. 05). Conclusion There is a relationship between delays in seeking medical attention and type of symptom identification, which may affect the short-term prognosis in patient with acute ischemic stroke. It is required to enhance the public health education about identification of stroke signs. (目的 调查分析急性缺血性脑卒中患者院前延迟就医的原因与短期预后的相关性, 为制定促使患者院前及时就医的干预措施而提供科学依据。方法 纳入2021年9月—2022年8月就诊于医院急诊科的131例急性缺血性脑卒中患者作为研究对象。采用统一的自制调查表记录患者一般信息和临床资料。根据就诊时间, 将症状出现至就诊时间≥3. 5 h的患者设为院前延迟就医组, 时间＜3. 5h的患者设为及时就医组。采用单因素分析相关因素。结果 及时就医组患者74 例, 延迟就医组患者 57例。两组患者在年龄、性别、婚姻状况、文化程度、医疗保险、职业状态、现居住地、距离、就诊方式、发病地点、入院时间、发病时间、发病症状、发病模式、既往病史、入院时美国国立卫生研究院卒中量表(NIHSS)评分方面差异无统计学意义(P＞0. 05)。两组患者症状识别方式和发病第14天的NIHSS评分比较, 差异有统计学意义(P< 0. 05)。结论 急性缺血性脑卒中延迟就医原因与相关症状识别方式密切相关, 影响患者的短期预后, 应加强大众识别卒中相关症状的健康教育以促进患者及时就诊。)

随着外科技术的不断改进、医学工程学与材料学的发展，复合带瓣血管的根部置换术（Bentall手术）成为了主动脉根部病变的标准术式。作为Bentall手术的替代手段，保留主动脉瓣的根部替换术术后避免了终身抗凝和机械瓣膜的相关并发症，降低了血栓栓塞、出血事件的发生率，其有利的血流动力学和潜在更低的心内膜炎风险，保证了术后持久的主动脉瓣功能，患者的生存质量大大提高。本文综述了保留主动脉瓣的根部替换术的适应症、标准化技术要点及其在不同患者中应用的远期结果。

基于少量图像的三维重建被认为是第三代人工智能的经典应用之一。在计算机图形学和计算机视觉领域，基于少量图像的三维重建任务因具有广泛的应用场景和很高的研究价值，长期以来吸引着众多学者的目光。引入深度学习方法后，该领域于近年来得到了长足发展。对此类基于少量图像的三维重建任务进行了全面阐述，并介绍了本研究组在该方面的系列工作，对其中涉及的数据类型进行分析，阐明其适用性和一般处理方法。此外，对常见的数据集进行分析、整理，针对不同重建方法，归纳出其基本框架、思路。最后，展示了一些常见三维重建的代表性实验结果，并提出了未来可能的研究方向。

旨在为固体碱催化剂催化油脂裂化制备生物基燃料油提供参考，采用共沉淀法制备Mg-Al水滑石，煅烧后作为催化剂，催化菜籽油裂化制备生物基燃料油。采用XRD、FT-IR、SEM等分析方法对催化剂进行表征分析，并通过对其催化油脂裂化液体产物收率、酸值、皂化值的分析，对其催化性能进行评价，同时采用GC-MS分析了液体产物的组成。结果表明：当催化裂化温度为470 ℃，镁铝比为3∶ 1时，液体产物的收率（60.20%）较高，酸值（KOH）（1.1 mg/g）和皂化值(KOH)(9.3 mg/g)较低；催化剂的最佳使用次数为5次；催化剂的镁铝比为3∶ 1时，液体产物的烷烃和烯烃含量较高。煅烧后的Mg-Al水滑石虽然部分结构遭到破坏，但仍具有很高的结晶度和碱活性，在一定程度上提高了生物基燃料油的品质。 In order to provide a reference for the preparation of bio-based fuel oil by oil cracking catalyzed with solid base catalyst, the Mg-Al hydrotalcite was prepared by co-precipitation method, and then was calcined. The calcined Mg-Al hydrotalcite was used as catalyst to produce bio-based fuel oil by oil cracking.The catalyst was characterized by XRD, FT-IR and electron microscope, and its catalytic performance was evaluated by analyzing the yield, acid value and saponification value of liquid product produced by oil cracking. In addition, the composition of the liquid product was analyzed. The results showed that under the conditions of cracking temperature 470 ℃and ratio of magnesium to aluminum in catalyst 3∶ 1, the yield of liquid product(60.20%) was higher, the acid value (1.1 mgKOH/g)and saponification value(9.3 mgKOH/g) of liquid product were lower. The optimal using times of catalyst were 5. The contents of alkanes and olefins in the liquid product were higher when the ratio of magnesium to aluminum in the catalyst was 3∶ 1. Although part of the structure of calcined Mg-Al hydrotalcite was destroyed, it still had high crystallinity and alkali activity, which improved the quality of bio-based fuel oil to a certain extent.

目的比较长托宁与阿托品在全麻无抽搐电休克治疗（MECT）中作为术前用药的安全性与有效性，为临床MECT术前用药提供依据。方法将104例接受MECT治疗的患者随机分成观察组和对照组，各52例。观察组术前静注长托宁，对照组术前静注阿托品，余麻醉方法相同。观察监测并记录两组电疗过程中血流动力学指标变化、口腔分泌物含量以及术后48 h内不良反应发生情况。结果两组患者的收缩压（SBP）、舒张压（DBP）、平均动脉压（MAP）及心率（HR）在电刺激后显著升高（PP>0.05），阿托品组药物注射后心率显著升高（PPP>0.05）；两组口腔分泌物含量及术后48 h内不良反应发生情况差异无统计学意义（P>0.05）。结论相较于阿托品，长托宁应用于MECT安全指数更高，稳定血流动力学指标效果更好，可作临床推广应用。

杜邦嗜热菌脂肪酶(LIP1)是一种在洗涤行业、生物柴油制备、油脂改性等领域具有良好应用潜力的碱性脂肪酶，然而其天然产量极低，难以满足产业化需求。采用组合优化策略筛选出高效表达LIP1的毕赤酵母重组菌株。首先，构建毕赤酵母密码子偏好性优化的LIP1基因，通过高浓度G418抗性平板和BMMY-罗丹明B定性平板筛选出脂肪酶活性较高的重组菌株；其次，利用信号肽优化和分子伴侣共表达优化筛选得到一株高效表达的重组毕赤酵母菌株GS115/pPIC9K-Mss-SSA4-LIP1，采用碱滴定法测定其酶活,采用比色法测定其底物特异性。结果表明，经组合优化策略筛选出的菌株在摇瓶和5 L发酵罐中发酵最高分泌酶活分别达到1 136 U/mL和12 150 U/mL。底物特异性结果显示重组脂肪酶LIP1最适底物为C8链长的对硝基苯酚酯。综上所述，基于组合优化策略实现了LIP1在毕赤酵母中的高效表达，为未来LIP1的产业化奠定基础。 Thermomyces dupontii lipase (LIP1) is an alkaline lipase, which posses good application potential in washing industry, biodiesel preparation, oil modification, etc. However, the natural productivity of LIP1 is extremely too low to meet the requirements of industrial application. A combinatorial optimization strategy was applied for the screening of Pichia pastoris strain highly expressing LIP1. Firstly, a Pichia pastoris prefered codon optimized LIP1 gene was constructed, and the recombinant strain with higher LIP1 gene copy numbers was screened through high-concentration G418 plates and BMMY-rhodamine B qualitative plates. Moreover, through signal peptides optimization and chaperone co-expression optimization, a high-productivity recombinant Pichia postoris strain GS115/pPIC9K-Mss-SSA4-LIP1 was obtained.The enzyme activity was determined by alkali titration,and the substrate specificity was determined by colorimetric assay. The results showed that the highest secretive activity of the strain after combinatorial optimization strategy could reach1 136 U/mL in flask fermentation and 12 150 U/mL in 5 L fermenter, The substrate specificity result showed that the most suitable substrate for Pichia pastoris recombinanted LIP1 was p-nitrophenol ester with eight carbons.In conclusion, the high-efficient expression of LIP1 in Pichia pastoris can be realized based on the combinatorial optimization strategy, which will lay the foundation for the future industrialization of LIP1.

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Copyright of Electric Power Engineering Technology is the property of Editorial Department of Electric Power Engineering Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Electric Power Automation Equipment / Dianli Zidonghua Shebei is the property of Electric Power Automation Equipment Press and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Materials Engineering / Cailiao Gongcheng is the property of Journal of Materials Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Water Conservancy & Electric Power Technology & Application is the property of Omniscient Pte. Ltd. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Tissue Engineering Research / Zhongguo Zuzhi Gongcheng Yanjiu is the property of Chinese Journal of Tissue Engineering Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Food Research & Development is the property of Food Research & Development Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Objective To investigate the value of preoperative CT signs combined with clinical indicators in predicting the expression of cytokeratin 19 (CK19) in patients with hepatocellular carcinoma (HCC). Methods HCC patients admitted to Guangxi Medical University Cancer Hospital from January 2019 to December 2021 were enrolled as the studied objects. The clinical data and CT signs were collected and randomly divided into training group and validation group according to a ratio of 7: 3. The independent predictors of CK19 expression was analyzed by Logistic backward stepwise regression and a predictive model was constructed. The receiver operating characteristic (ROC) curve, calibration curve, and decision curve were used to evaluate the predictive efficacy of the model. Results A total of 380 HCC patients were enrolled, of which 68 (17.9%) were CK19 positive. Age, AFP, rim arterial phase hyperenhancement, delayed central enhancement, and intratumoral artery were independent predictors of CK19 expression in HCC (all P<0.05). The area under the curve (AUC) of CK19 expression predicted by the clinical imaging model in the training group and validation group was 0.789 and 0.748, respectively. The calibration curve showed a good fitting degree of the clinical imaging model. The decision curve showed that the clinical image model had good clinical application value. Conclusions Preoperative CT signs combined with age and AFP effectively predict CK19 expression in HCC patients. [ABSTRACT FROM AUTHOR]

The genome of tomato spotted wilt virus (TSWV) can encode various proteins, including RdRp, NSm, NSs, Gc, Gn, and N. Existing research primarily focuses on plant (tomato and chili pepper) resistance to TSWV mediated by resistance genes (Sw-5b and Tsw). Furthermore, the inhibitory effects of agents on the TSWV N proteins have been investigated. TSWV proteins have the potential to be used as molecular targets for pharmaceutical agents, however, the mechanism of action between TSWV proteins and pharmaceutical agents has not been systematically and comprehensively reported. This study presents a detailed analysis of the three-dimensional structures of resolved TSWV proteins and predicts the structures of four unresolved TSWV proteins using AlphaFold2 modeling. It also summarizes the advancement and application of TSWV resistance genes and TSWV inhibitors in plant protection. The potential molecular mechanisms of ningnanmycin, moroxydine, and ribavirin on TSWV proteins were analyzed, along with their possible sites of action. The aim is to establish a theoretical foundation for subsequent comprehensive excavation and exploration of novel agents with anti-TSWV properties. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Chinese Institute of Food Science & Technology is the property of Journal of Chinese Institute of Food Science & Technology Periodical Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of China University of Petroleum is the property of China University of Petroleum and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Industrial Water Treatment is the property of CNOOC Tianjin Chemical Research & Design Institute and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Biology Teaching is the property of East China Normal University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Network & Information Security is the property of Beijing Xintong Media Co., Ltd. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Network & Information Security is the property of Beijing Xintong Media Co., Ltd. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Tissue Engineering Research / Zhongguo Zuzhi Gongcheng Yanjiu is the property of Chinese Journal of Tissue Engineering Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Modern Preventive Medicine is the property of Modern Preventive Medicine Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Machine Tool & Hydraulics is the property of Guangzhou Mechanical Engineering Research Institute (GMERI) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The Daloushan tectonic belt is located at the southeast margin of the Sichuan Basin, at the junction of the Yangtze plate and the Cathaysia plate, which records the history of plate tectonics deformation in South China in detail. The Maotai Syncline is a typical superimposed fold structure located in the Daluoshan tectonic belt, which is the key to revealing the characteristics of Mesozoic and Cenozoic tectonic deformation in the Daluoshan tectonic belt. The geometric, kinematic and dynamical characteristics of the Maotai Syncline were analyzed through the tectonic analysis of the Maotai Syncline. Together with regional geological research, the Maotai syncline was involved into three phases of shortening deformation since the late Mesozoic. The first phases (D1) is represented by the near NE-SW syncline developed within the Jurassic system and its lower strata. Paleostress field inversion results indicate near-NW-SE compression. Together with the regional of angular unconformity and the latest strata involved in the deformation, this phases of tectonic deformation occurred at the end of the late Jurassic, and it is driven by the subduction of the ancient Pacific plate. The second phases (D2) deformation is represented by the superposition and transformation of the early NE-SW fold structure by the NE-SW shortening. Paleostress field inversion results indicate NE-SW compression. Together with the regional angle unconformity characteristics, it shows that the structural deformation of this phases occurred in the late Cretaceous, and it is driven by the outward uplift expansion of the Tibetan Plateau in its early stages. This third phase ( D3) of tectonic deformation is characterized by the development of nearly N-S trending compression tectonics. Together with the regional of angular unconformity and the latest strata involved in deformation, this tectonic deformation occurred at the end of the Paleogene period, driven by the eastward escape expansion of the Tibetan Plateau. [ABSTRACT FROM AUTHOR]

Copyright of Atomic Energy Science & Technology is the property of Editorial Board of Atomic Energy Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Agricultural Outlook (1673-3908) is the property of Institute of Agricultural Information, Chinese Academy of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)