检索结果-南通市图书馆

Implications for fault reactivation and seismicity induced by hydraulic fracturing

Petroleum Science 2024年第2期21卷 1081-1098页

作者： Zi-Han Sun ming-guang che Li-Hong Zhu Shu-Juan Zhang Ji-Yuan Lu Chang-Yu Jin Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines School of Resources and Civil Engineering and Key Laboratory of Liaoning Province on Deep Engineering and Intelligent TechnologyNortheastern UniversityShenyang110819LiaoningChina Research Institute of Petroleum Exploration&Development PetroChina Company LimitedBeijing100084China The Exploration and Development Research Institute of Daqing Oilfield Limited Company Daqing163458HeilongjiangChina

Evaluating the physical mechanisms that link hydraulic fracturing(HF) operations to induced earthquakes and the anticipated form of the resulting events is significant in informing subsurface fluid injection operations. Current understanding supports the overriding role of the effective stress magnitude in triggering earthquakes, while the impact of change rate of effective stress has not been systematically addressed. In this work, a modified critical stiffness was brought up to investigate the likelihood, impact,and mitigation of induced seismicity during and after hydraulic fracturing by developing a poroelastic model based on rate-and-state fraction law and linear stability analysis. In the new criterion, the change rate of effective stress was considered a key variable to explore the evolution of this criterion and hence the likelihood of instability slip of fault. A coupled fluid flow-deformation model was used to represent the entire hydraulic fracturing process in COMSOL Multiphysics. The possibility of triggering an earthquake throughout the entire hydraulic fracturing process, from fracturing to cessation, was investigated considering different fault locations, orientations, and positions along the fault. The competition between the effects of the magnitude and change rate of effective stress was notable at each fracturing stage. The effective stress magnitude is a significant controlling factor during fracturing events, with the change rate dominating when fracturing is suddenly started or stopped. Instability dominates when the magnitude of the effective stress increases(constant injection at each fracturing stage) and the change rate of effective stress decreases(the injection process is suddenly stopped). Fracturing with a high injection rate, a fault adjacent to the hydraulic fracturing location and the position of the junction between the reservoir and fault are important to reduce the Coulomb failure stress(CFS) and enhance the critical stiffness as

关键词： Hydraulic fracturing Coulomb failure stress Rate-and-state fraction model Linear stability analysis Critical stiffness Seismically induced fault

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

Defects in phospholipase C zeta cause polyspermy and low fertilization after conventional IVF:not just ICSI failure

引用

Asian Journal of Andrology 2024年第2期26卷 175-182页

作者： Jian-Fang che Hui-Xia Wu Si-Cong Zeng Yue-Ren Wu Jing Dai De-Hua cheng Fei Gong guang-Xiu Lu Ge Lin Can Dai School of Medicine Hunan Normal UniversityChangsha 410013China Reproductive and Genetic Hospital of CITIC-Xiangya Changsha 410008China Clinical Research Center for Reproduction and Genetics in Hunan Province Changsha 410078China National Engineering and Research Center of Human Stem Cell Changsha 410205China

Phospholipase C zeta(PLC)is a key sperm-borne oocyte-activating factor that triggers Ca^(2+)oscillations and the subsequent block to polyspermy following gamete *** in PLCZ1,the gene encoding PLCζ,cause male infertility and intracytoplasmic sperm injection(ICSI)fertilization failure;and PLCζ expression and localization patterns are significantly correlated with ICSI fertilization rate(FR).However,in conventional in vitro fertilization(cIVF),whether and how sperm PLCζ affects fertilization remain ***,we identified one previously reported and two novel PLCZ1 mutations associated with polyspermy in vitro that are characterized by excessive sperm-zona binding and a delay in pronuclei(PN)*** staining and oocyte activation testing revealed that virtually all spermatozoa from patients lacked functional PLCζ and were thus unable to evoke Ca^(2+) *** with an artificial oocyte activation treatment successfully rescued the polyspermic phenotype and resulted in a live ***,we analyzed PLCζ in an additional 58 males after cIVF treatment in the Reproductive and Genetic Hospital of CiTiC-Xiangya(Changsha,China)between February 2019 and January *** found that the proportion of spermatozoa that expressed PLCζ was positively correlated with both 2PN rate and total *** optimal cutoff value below which males were likely to experience low FR(total FR≤30%)after clVF was 56.7%for the proportion of spermatozoa expressing *** study expands the mutation and the phenotypic spectrum of PLCZ1 and further suggests that PLCζ constitutes a promising biomarker for identifying low FRs cases in cIVF due to sperm-related oocyte activation deficiency and that sperm PLCζ analysis may benefit the widermale population and not onlymen with IcsI failure.

关键词： conventional IVF gene variants PLCζ polyspermy

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

Functional dissection of parabrachial substrates in processing nociceptive information

引用

Zoological Research 2024年第3期45卷 633-647页

作者： Jin Ke Wei-cheng Lu Hai-Yang Jing Shen Qian Sun-Wook Moon guang-Fu Cui Wei-Xin Qian Xiao-Jing che Qian Zhang Shi-Shi Lai Ling Zhang Ying-Jie Zhu Jing-Dun Xie Tian-Wen Huang Shenzhen Key Laboratory of Drug Addiction Shenzhen-Hong Kong Institute of Brain ScienceBrain Cognition and Brain Disease InstituteShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhenGuangdong 518055China CAS Key Laboratory of Brain Connectome and Manipulation Brain Cognition and Brain Disease InstituteShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhenGuangdong 518055China University of Chinese Academy of Sciences Beijing 100049China Department of Anesthesiology State Key Laboratory of Oncology in South ChinaGuangdong Provincial Clinical Research Center for CancerSun Yat-sen University Cancer CenterGuangzhouGuangdong 510060China University of Science and Technology of China HefeiAnhui 230027China Department of Anesthesiology Shenzhen University General Hospital and Shenzhen University Academy of Clinical Medical SciencesShenzhen UniversityShenzhenGuangdong 518055China School of Medicine Yunnan UniversityKunmingYunnan 650091China

Painful stimuli elicit first-line reflexive defensive reactions and,in many cases,also evoke second-line recuperative behaviors,the latter of which reflects the sensing of tissue damage and the alleviation of *** lateral parabrachial nucleus(lPBN),composed of external-(elPBN),dorsal-(dlPBN),and central/superior-subnuclei(jointly referred to as slPBN),receives sensory inputs from spinal projection neurons and plays important roles in processing affective information from external threats and body integrity ***,the organizational rules of lPBN neurons that provoke diverse behaviors in response to different painful stimuli from cutaneous and deep tissues remain *** this study,we used region-specific neuronal depletion or silencing approaches combined with a battery of behavioral assays to show that slPBN neurons expressing substance P receptor(NK1R)(lPBNNK1R)are crucial for driving pain-associated self-care behaviors evoked by sustained noxious thermal and mechanical stimuli applied to skin or bone/muscle,while elPBN neurons are dispensable for driving such ***,lPBNNK1R neurons are specifically required for forming sustained somatic pain-induced negative teaching signals and aversive memory but are not necessary for fear-learning or escape behaviors elicited by external ***,both lPBNNK1R and elPBN neurons contribute to chemical irritant-induced nocifensive *** results reveal the functional organization of parabrachial substrates that drive distinct behavioral outcomes in response to sustained pain versus external danger under physiological conditions.

关键词： Lateral parabrachial nucleus Substance P receptor Pain affect Defensive reaction Somatosensory

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

外侧盘状半月板的中西医治疗新进展

引用

实用医院临床杂志 2024年第3期21卷 26-29页

作者：林峰车广伟余明琅黄勇成都中医药大学附属医院四川成都610072

盘状半月板作为半月板的一种先天变异,由Young在1889年首次提出,属中医学“伤筋”范畴。该病的形成机制尚不明确,多存在于外侧半月板,损伤多与活动相关,且在亚洲人群多发。临床上多建议以手术治疗为主,而随着中医治疗的不断研究,也为我... 详细信息

盘状半月板作为半月板的一种先天变异,由Young在1889年首次提出,属中医学“伤筋”范畴。该病的形成机制尚不明确,多存在于外侧半月板,损伤多与活动相关,且在亚洲人群多发。临床上多建议以手术治疗为主,而随着中医治疗的不断研究,也为我们临床治疗提供了多种方案。本文对当前外侧盘状半月板的中西医治疗情况进行综述,以期为临床工作提供一定的指导作用。

关键词：外侧盘状半月板中西医结合治疗

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

黄河三角洲盐沼湿地螃蟹洞穴形态结构对土壤水盐运移过程的影响

引用

生态与农村环境学报 2024年第6期40卷 831-839页

作者：解璐萌查玟琦车纯广李游蕊李纪尧刘佳凯张振明北京林业大学生态与自然保护学院/黄河流域生态保护国家林业和草原局重点实验室北京100083 山东黄河三角洲国家级自然保护区黄河口管理站山东东营257500

明晰潮汐驱动下螃蟹洞穴对盐沼湿地水盐运移过程的扰动效应,对基于生态过程的黄河三角洲盐沼湿地保护与修复具有重要的理论及现实意义。研究结合野外调查和室内水槽模拟实验,探究潮间带螃蟹洞穴形态与分布特征,分析了潮汐作用下不同螃... 详细信息

明晰潮汐驱动下螃蟹洞穴对盐沼湿地水盐运移过程的扰动效应,对基于生态过程的黄河三角洲盐沼湿地保护与修复具有重要的理论及现实意义。研究结合野外调查和室内水槽模拟实验,探究潮间带螃蟹洞穴形态与分布特征,分析了潮汐作用下不同螃蟹洞穴形态对水盐运移过程的影响。结果表明:(1)潮汐影响下,黄河三角洲潮间带螃蟹洞穴空间分布密度有差异,3条潮沟洞穴密度分别为(15.50±4.65)、(12.90±2.69)和(6.60±2.76)个·(0.25 m^(2))^(-1);(2)对螃蟹洞穴树脂模型进行简化归类,发现其主要形态结构为I型、L型、S型、X型、Y型,以上5种形态在获得的42个螃蟹洞穴中占比高达85.7%;(3)不同螃蟹洞穴形态在潮汐作用下土壤含水量变化趋势没有明显差异,而电导率随高潮与低潮呈现不同的升高与降低过程;(4)潮汐影响下,空白实验组潮汐水入渗量、孔隙水排泄量均显著低于有螃蟹洞穴的实验组,孔隙水排泄主要集中在水位下降时段,而L型洞穴因具有一定的储水能力,使更多的孔隙水在稳定时段排泄。(5)不同螃蟹洞穴形态对土壤盐排泄量有显著影响,S2、X和I组盐排泄量最高,空白组最低,仅为(0.403±0.003)g·d^(-1)。研究结果从水文学角度揭示了螃蟹洞穴的生态功能,将为后续的滨海湿地生态水文过程研究提供参考。

关键词：黄河三角洲盐沼湿地螃蟹洞穴水盐运移过程模拟实验

来源：

维普期刊数据库

同方期刊数据库

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

Reinforcement learning-based unknown reference tracking control of HMASs with nonidentical communication delays

引用

Science China(Information Sciences) 2023年第7期66卷 46-57页

作者： Yong XU Zheng-guang WU Wei-Wei che Deyuan MENG School of Automation Beijing Institute of Technology Institute of Cyber-Systems and Control Zhejiang University College of Mathematics and Computer Science Zhejiang Normal University Department of Automation Qingdao University School of Automation Science and Electrical Engineering Beihang University(BUAA)

This paper focuses on the optimal output synchronization control problem of heterogeneous multiagent systems(HMASs) subject to nonidentical communication delays by a reinforcement learning *** with existing studies assuming that the precise model of the leader is globally or distributively accessible to all or some of the followers, the leader’s precise dynamical model is entirely inaccessible to all the followers in this paper. A data-based learning algorithm is first proposed to reconstruct the leader’s unknown system matrix online. A distributed predictor subject to communication delays is further devised to estimate the leader’s state, where interaction delays are allowed to be nonidentical. Then, a learning-based local controller, together with a discounted performance function, is projected to reach the optimal output synchronization. Bellman equations and game algebraic Riccati equations are constructed to learn the optimal solution by developing a model-based reinforcement learning(RL) algorithm online without solving regulator equations, which is followed by a model-free off-policy RL algorithm to relax the requirement of all agents’ dynamics faced by the model-based RL algorithm. The optimal tracking control of HMASs subject to unknown leader dynamics and communication delays is shown to be solvable under the proposed RL algorithms. Finally, the effectiveness of theoretical analysis is verified by numerical simulations.

关键词： heterogeneous multiagent systems HMAS reinforcement learning RL optimal output synchronization communication delays

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

滨海盐沼湿地地貌形态和植被格局的生态-地貌耦合模拟研究

引用

海洋与湖沼 2024年第4期55卷 876-886页

作者：张德琛武国相王柯萌梁丙臣张树岩车纯广中国海洋大学工程学院山东青岛266100 中国海洋大学山东省海洋工程重点实验室山东青岛266100 山东黄河三角洲国家级自然保护区黄河口管理站山东东营257061

滨海盐沼湿地是重要的海岸带生态系统,其地貌形态和植被格局受潮汐动力、泥沙供给等条件影响显著。近年来,盐沼生态-地貌动力学研究成为前沿研究热点。以我国典型潮滩盐沼的动力环境为原型,建立考虑水动力-泥沙-地貌-植被互馈过程的动... 详细信息

滨海盐沼湿地是重要的海岸带生态系统,其地貌形态和植被格局受潮汐动力、泥沙供给等条件影响显著。近年来,盐沼生态-地貌动力学研究成为前沿研究热点。以我国典型潮滩盐沼的动力环境为原型,建立考虑水动力-泥沙-地貌-植被互馈过程的动态耦合模型,研究了不同潮差、海平面上升速率、泥沙供给与泥沙性质等关键变量影响下的盐沼湿地植被-地貌耦合演变过程。研究结果表明,外部泥沙供给是控制潮滩-盐沼高程和植被范围的关键要素,外海悬沙浓度越大,滩面坡度越缓、滩面高程越高、植被的海向延伸越宽;泥沙沉降速度越小,易形成上凸型剖面,且湿地植被分布范围更宽;潮差同时影响盐沼在潮间带的下部边界和上部边界,更大的潮差、更强的潮汐水动力有助于形成更高的潮沟密度和泥沙向盐沼内部的输送效率。研究结果可为滨海湿地保护和修复工程提供理论参考。

关键词：盐沼湿地潮滩-潮沟系统植被生态地貌学

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

常用杀虫剂对洋白蜡2种蛀干害虫的生物活性测定及田间药效评价

引用

农药 2024年第6期63卷 459-463页

作者：车少臣仇兰芬王宇欣胡阳李广刘倩李娜夏菲仲丽北京市园林绿化科学研究院园林绿地生态功能评价与调控技术北京市重点实验室北京100102 河北大学生命科学学院生命科学与绿色发展研究院河北保定071002 北京市通州区林业保护站北京101100

[目的]筛选高效、低毒、低残留的杀虫剂,以有效防治洋白蜡树的主要蛀干害虫小线角木蠹蛾和白蜡窄吉丁。[方法]分别选择浸虫法和浸叶法对小线角木蠹蛾幼虫和白蜡窄吉丁成虫进行室内生物活性测定,并对小线角木蠹蛾用树干注药法进行田间药... 详细信息

[目的]筛选高效、低毒、低残留的杀虫剂,以有效防治洋白蜡树的主要蛀干害虫小线角木蠹蛾和白蜡窄吉丁。[方法]分别选择浸虫法和浸叶法对小线角木蠹蛾幼虫和白蜡窄吉丁成虫进行室内生物活性测定,并对小线角木蠹蛾用树干注药法进行田间药效试验。[结果]阿维菌素对小线角木蠹蛾10龄幼虫的室内生物活性最高,24 h致死中浓度(LC50)为16.06 mg/L,氯虫苯甲酰胺对其活性最低。对于白蜡窄吉丁成虫,阿维菌素的室内生物活性最高,24 h LC_(50)为36.53 mg/L,啶虫脒活性最低。田间药后10 d,10%啶虫脒微乳剂(800、1600 mg/L)、2%甲氨基阿维菌素苯甲酸盐微乳剂(40、160 mg/L)、100 g/L溴虫氟苯双酰胺悬浮剂(2000、4000 mg/L)和1.8%阿维菌素乳油(28.8、57.6 mg/L)对小线角木蠹蛾幼虫的防治效果最好,防效均达到90%以上。[结论]啶虫脒、甲氨基阿维菌素苯甲酸盐和阿维菌素可用于防治小线角木蠹蛾幼虫,阿维菌素、噻虫啉、甲氨基阿维菌素苯甲酸盐室内对白蜡窄吉丁成虫具有较好活性。

关键词：洋白蜡杀虫剂生物活性测定田间防效小线角木蠹蛾白蜡窄吉丁

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

污泥处理处置技术的生命周期评价研究进展

引用

应用化工 2024年第4期53卷 969-973页

作者：纪龙涛顾敦罡陆嘉麒蔡斌车磊李光辉上海工程技术大学化学化工学院上海201620 浙江宜可欧环保科技有限公司浙江湖州313000

综述了目前应用较多的污泥处理处置技术,对生命周期评价的定义和技术框架进行了介绍,并对国内外污泥处理处置技术的生命周期评价研究进展进行了归纳、对比与探讨,分析了不同技术对环境影响的特点,总结并提出了污泥处理处置技术的生命周... 详细信息

综述了目前应用较多的污泥处理处置技术,对生命周期评价的定义和技术框架进行了介绍,并对国内外污泥处理处置技术的生命周期评价研究进展进行了归纳、对比与探讨,分析了不同技术对环境影响的特点,总结并提出了污泥处理处置技术的生命周期,评价研究现阶段的不足及未来的发展方向。

关键词：污泥生命周期评价环境影响技术改进

来源：

维普期刊数据库

同方期刊数据库

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

Obesity paradox among elderly patients with coronary artery disease undergoing non-cardiac surgery

引用

Journal of Geriatric Cardiology 2018年第9期15卷 598-604页

作者： Lu che Li XU ming-Ya WANG Yu-guang HUANG Department of Anesthesiology Peking Union Medical College Hospital Beijing China Department of Anesthesiology State Key Laboratory of Translational Cardiovascular Medicine Fuwai Hospital & Cardiovascular Institute Chinese Academy of Medical Science Peking Union Medical College Beijing China

BackgroundHigh 身体团索引(BMI ) 是为长期的心脏病的一个风险因素。然而，装高 BMI 与正常 BMI 相比与心脏的病态和死亡的更少的风险被联系的证据支持，也作为肥胖悖论知道。因此，我们寻求了关于 perioperative 决定肥胖悖论的存在... 详细信息

BackgroundHigh 身体团索引(BMI ) 是为长期的心脏病的一个风险因素。然而，装高 BMI 与正常 BMI 相比与心脏的病态和死亡的更少的风险被联系的证据支持，也作为肥胖悖论知道。因此，我们寻求了关于 perioperative 决定肥胖悖论的存在在有经历非心脏的 *** 的已知的冠的动脉疾病的老中国病人之中的 30 天的心脏的事件未来的、多机构的队研究的 hoc 以后的分析被执行。病人们变老 > 有冠的动脉疾病和经历的非心脏的外科的历史的 60 年根据 BMI 被组织：不足的重量(2), 正常重量(18.5-24.9 kg/m 2), 过重(25-29.9 kg/m 2) 并且肥胖(30 kg/m 2) 。人口统计的信息， perioperative 30 天的手术后的心脏的不利事件的临床的变量和发生从识别的研究 *** 被检索 1202 个合格病人(BMI：24.3 ? ┵崩愠摮映浥牯污愠灰潲捡 ?? 瀠潲散畤敲 ?? 金 ?? 潃据畬楳湯潆敲牡 ? 牡整楲獥挠湡戠 ? 獵摥愠 ? 污整湲瑡癩? 捡散獳猠瑩 ? 晡整 ? 湩瑩慩? 慲楤污愠灰潲捡 ? 慦汩牵 ? 湩漠摲牥琠? 敲畤散琠敨甠敳漠 ? 敦潭慲? 灡牰慯档搠牵湩 ? 慣摲慩? 慣桴瑥牥穩瑡潩？

关键词：心脏病肥胖悖论疾病动脉外科风险因素人口统计

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

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：