第二产程胎头深嵌剖宫产取胎方法88例临床分析

目的探讨第二产程胎头深嵌剖宫产术中取足娩胎法的优势。方法选择第二产程胎头深嵌必须进行剖宫产病例88例,随机分为观察组(取足娩胎法)和对照组(手取胎头法、宫腔外手推胎头出盆腔后取头法、经阴道上推胎头法)。分析两组的子宫切口裂伤、术中出血、新生儿窒息、术后病率及成功例数。结果取足娩胎法明显优于其他手法,差异有显著性(P<0.05)。结论第二产程剖宫产术取足娩胎法可有效减少子宫切口裂伤、术中出血、术后病率,且成功率高。

一种吸深增程装置设计

针对环卫车辆的吸污车和管网疏通车对较深的下水道清理和疏通作业时要求吸程深、吸污量大,作业困难的问题,设计了一种新型自动调节吸深增程装置。该装置可通过自动调节进气孔配合状态,调节进气量大小,适当减小被抽吸污物的密度,增加抽吸污泥的速度,达到吸深增程目的,提高了对深井下水道污泥的抽吸速度,大大提高了吸污效果和作业效率。

膨胀与萎缩:课程与教学研究的悖论——呼唤面向实践的教学论学科的重建

当前,对课程与教学的研究严重失调,课程理论膨胀而教学理论萎缩。课程理论的膨胀主要表现为泛化和时尚化,由此导致教学理论被边缘化,在客观上轻视或抑制了教学理论的发展。而历时五年多的基础教育课程改革中的主要问题则是教学问题,因此,当务之急是课程研究应明确边界,着力于本土化的建设,而教学研究应大力加强,从“大课程小教学”或“课程与教学整合”的思维模式中挣脱出来,寻求独立发展的空间。

土木工程本科专业培养模式及课程体系的研究与实践

研究新形式下交通学院土木工程本科专业培养模式及课程体系,分析了教学实践过程中存在的问题,提出了改革措施。

新课程背景下“物理规律教学”探析

物理规律既是物理科学的核心构件，也是物理教学的重要内容。但以往我们对物理规律的本质、类型、价值，以及有效教学策略认识模糊、探索不足。新课程改革赋予了物理规律教学新的任务和要求，于是本文深入探究了物理规律的内涵、阐明了物理规律教学的意义，并提出了物理规律教学的基本策略。

《C语言程序设计》网络课程的建设与应用研究

本文针对《C语言程序设计》教学中存在的问题,研究网络课程的构建及教学应用,以提高教学效率和教学质量。

论《民法学》课程体系之优化

民法学是以民法为研究对象的科学。该课程是法律科学体系的重要基础科学,也是法学专业必修的学科基础课程。随着我国法制化进程的加快和高校教学改革的深入,民法学课程体系也需要不断革新和优化,以满足社会实践和改革的需要。从民法学课程体系的沿革入手,分析目前该课程体系中存在的问题,提出优化课程体系依据,从课程内容、课程类型、学期规划和学时分配等方面,对民法学课程体系的优化提出建议。

美国课程观的价值基础及其评价

本文在以两个阶段、两条线索的划分来阐述20世纪美国课程观发展史的基础上,深层剖析了课程的价值基础取向的百年嬗变,并指出了课程评价的发展趋势:从量化评价走向质化评价。

《英语课程标准》(实验稿)的两大问题

词汇量的大小不是决定英语运用能力高低的主要因素,根据国内外多年的研究和实践证明:掌握2000多词足以进行听说读写语言交际活动。任务型教学正在英国南部进行教学实验,目前还没有令人信服的结果,把它搬来写进课程标准是不合适的。课程标准应符合外语教学规律,符合国情,不违背国家基本教育政策。

《供电工程》课程教学改革与实践

本文探讨了《供电工程》课程在教改过程中对学生能力培养的意义、特点,并介绍了《供电工程》课程教学改革的具体情况和取得的一些成果。

凸显仿真技术在电气专业课程教学中的运用

将仿真技术融合于高职电气课程教学中，具有教学方法新颖、手段先进、内容生动直观等的特点，从而能增强学生的学习兴趣，加深学生对理论知识的理解，提高了学生的动手能力，达到理想的教学效果。

第二产程剖宫产术巧取胎头40例临床应用

目的:探讨第二产程剖宫产术胎头深嵌宫腔外手推胎头出盆腔后取头法的优势。方法:选择第二产程必须进行剖宫产病例80例,随机分为观察组和对照组。分析两组的子宫切口裂伤、术中出血、新生儿窒息、手术时间、术后病率情况。结果:宫腔外手推胎头出盆腔后取头法,明显优于常规手法,比较差异有显著性(P<0.05)。结论:第二产程剖宫产术宫腔外手推胎头出盆腔后取头法,能减少子宫切口裂伤、术中出血、新生儿窒息及术后病率,缩短手术时间,无新生儿产伤,方法简单、易学。

Deep Learning Hybrid Model for Lithium-Ion Battery Aging Estimation and Prediction

The degradation process of lithium-ion batteries is intricately linked to their entire lifecycle as power sources and energy storage devices,encompassing aspects such as performance delivery and cycling utilization.Consequently,the accurate and expedient estimation or prediction of the aging state of lithium-ion batteries has garnered extensive attention.Nonetheless,prevailing research predominantly concentrates on either aging estimation or prediction,neglecting the dynamic fusion of both facets.This paper proposes a hybrid model for capacity aging estimation and prediction based on deep learning,wherein salient features highly pertinent to aging are extracted from charge and discharge relaxation processes.By amalgamating historical capacity decay data,the model dynamically furnishes estimations of the present capacity and forecasts of future capacity for lithium-ion batteries.Our approach is validated against a novel dataset involving charge and discharge cycles at varying rates.Specifically,under a charging condition of 0.25 C,a mean absolute percentage error(MAPE)of 0.29%is achieved.This outcome underscores the model's adeptness in harnessing relaxation processes commonly encountered in the real world and synergizing with historical capacity records within battery management systems(BMS),thereby affording estimations and prognostications of capacity decline with heightened precision.

农业可持续发展与高等农业教育现状的调查分析

通过对在校大学生的调查和分析,及时了解并掌握可持续发展战略背景下高等农业教育的现状与作用、当前大学生对农业可持续发展的了解和掌握情况以及高校专业与课程的设置能否适应可持续发展的要求,从而为今后高等农业院校制定相关专业提供了理论和实际依据。

Fracture prediction method for deep coalbed methane reservoirs based on seismic texture attributes

Deep coalbed methane(CBM)resources are enormous and have become a hot topic in the unconventional exploration and development of natural gas.The fractures in CBM reservoirs are important channels for the storage and migration of CBM and control the high production and enrichment of CBM.Therefore,fracture prediction in deep CBM reservoirs is of great significance for the exploration and development of CBM.First,the basic principles of calculating texture attributes by gray-level cooccurrence matrix(GLCM)and gray-level run-length matrix(GLRLM)were introduced.A geological model of the deep CBM reservoirs with fractures was then constructed and subjected to seismic forward simulation.The seismic texture attributes were extracted using the GLCM and GLRLM.The research results indicate that the texture attributes calculated by both methods are responsive to fractures,with the 45°and 135°gray level inhomogeneity texture attributes based on the GLRLM showing better identification effects for fractures.Fracture prediction of a deep CBM reservoir in the Ordos Basin was carried out based on the GLRLM texture attributes,providing an important basis for the effi cient development and utilization of deep CBM.

Development of the artificial seabed technology and implementation pretrial well in the South China Sea

This paper introduces the recent highly significant activity of China Oilfield Services Ltd. （COSL） in the South China Sea, where COSL conducted pretrial drilling in June of 2008. The paper discusses some key research and new practices which led to the fabrication of related equipment which was evaluated in the trial. The market for deepwater drilling in the world has grown over the past 10 years but there are few drilling vessels or platforms suitable for drilling in deepwater or super deepwater. China needs equipment capable of deepwater drilling operations. COSL has some semisubmersible platforms, but they are only considered suitable for operations in water depths less than 475 m. An enabling technology, referred to as an artificial seabed, has been under development by COSL since 2004, and it applies the research results and experiences of many experts in deepwater drilling. COSL hopes this technology will allow drilling to depths of approximately 1 000-1 500m with its current platforms. The paper presents research progress and improvements in fabrication and necessary upgrades to equipment for extending deepwater drilling. The pretrial well was executed at a water depth of nearly 500m. COSL will drill the trial well around 2009 at the same location in the South China Sea.

High angle prestack depth migration with absorption compensation

The absorption effect of actual subsurface media can weaken wavefield energy, decrease the dominating frequency, and further lead to reduced resolution. In migration, some actions can be taken to compensate for the absorption effect and enhance the resolution. In this paper, we derive a one-way wave equation with an attenuation term based on the time- space domain high angle one-way wave equation. A complicated geological model is then designed and synthetic shot gathers are simulated with acoustic wave equations without and with an absorbing term. The derived one-way wave equation is applied to the migration of the synthetic gathers without and with attenuation compensation for the simulated shot gathers. Three migration profiles are obtained. The first and second profiles are from the shot gathers without and with attenuation using the migration method without compensation, the third one is from the shot gathers with attenuation using the migration method with compensation. The first and third profiles are almost the same, and the second profile is different from the others below the absorptive layers. The amplitudes of the interfaces below the absorptive layers are weak because of their absorption. This method is also applied to field data. It is concluded from the migration examples that the migration method discussed in this paper is feasible.

提升自我，演绎精彩历史课堂

中学历史教学随着课改而不断变化着。历史新课程以其全新的教学理念，不断地提高教师的认知水平，帮助学生快速地获得历史知识，有效地提高学生的人文素养，从而使历史课堂变得越来越精彩。

Preserved amplitude migration based on the one way wave equation in the angle domain

Traditional pre-stack depth migration can only provide subsurface structural information. However, simple structure information is insufficient for petroleum exploration which also needs amplitude information proportional to reflection coefficients. In recent years, pre-stack depth migration algorithms which preserve amplitudes and based on the one- way wave equation have been developed. Using the method in the shot domain requires a deconvolution imaging condition which produces some instability in areas with complicated structure and dramatic lateral variation in velocity. Depth migration with preserved amplitude based on the angle domain can overcome the instability of the one-way wave migration imaging condition with preserved amplitude. It can also offer provide velocity analysis in the angle domain of common imaging point gathers. In this paper, based on the foundation of the one-way wave continuation operator with preserved amplitude, we realized the preserved amplitude prestack depth migration in the angle domain. Models and real data validate the accuracy of the method.

EFFECTIVE DETECTION DEPTH OF NEEDLE-LIKE OPTICAL PROBE

The effective detection depth of the needle-like optical probe is studied. The light transport model in highly scattering tissue is the diffusion equation and the boundary is Neuman. The sensitivity matrix is related to the position of the light source and the detector. It can be used to evaluate the effective detection depth. The sensitivity matrix is defined as the multiplication of the source and detector hght distribution. Six different groups about ix parameters including the source diameter and detector fibers, the core-to-core distance between the source and detector fibers, the opotode depth, the absorption, and reduced scattering coefficient, are used as experimental models. The relationship between the six parameters and the effective detection depth is analyzed. Resuits can be used to study the spatial resolution and the depth of multi-fibers.