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A Fast and Memory-Efficient Direct Rendering Method for Polynomial-Based Implicit Surfaces
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作者 Jiayu Ren Susumu Nakata 《Computer Modeling in Engineering & Sciences》 SCIE EI 2024年第11期1033-1046,共14页
Three-dimensional surfaces are typically modeled as implicit surfaces.However,direct rendering of implicit surfaces is not simple,especially when such surfaces contain finely detailed shapes.One approach is ray-castin... Three-dimensional surfaces are typically modeled as implicit surfaces.However,direct rendering of implicit surfaces is not simple,especially when such surfaces contain finely detailed shapes.One approach is ray-casting,where the field of the implicit surface is assumed to be piecewise polynomials defined on the grid of a rectangular domain.A critical issue for direct rendering based on ray-casting is the computational cost of finding intersections between surfaces and rays.In particular,ray-casting requires many function evaluations along each ray,severely slowing the rendering speed.In this paper,a method is proposed to achieve direct rendering of polynomial-based implicit surfaces in real-time by strategically narrowing the search range and designing the shader to exploit the structure of piecewise polynomials.In experiments,the proposed method achieved a high framerate performance for different test cases,with a speed-up factor ranging from 1.1 to 218.2.In addition,the proposed method demonstrated better efficiency with high cell resolution.In terms of memory consumption,the proposed method saved between 90.94%and 99.64%in different test cases.Generally,the proposed method became more memory-efficient as the cell resolution increased. 展开更多
关键词 implicit surfaces direct rendering ray marching
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The Influence of Vulnerable Narcissism on Social Anxiety among Adolescents:The Mediating Role of Self-Concept Clarity and Self-Esteem
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作者 Yuetan Wang Xianle Yan +3 位作者 Lili Liu Xiran Lu Lan Luo Xiaobin Ding 《International Journal of Mental Health Promotion》 2024年第6期429-438,共10页
Social anxiety (SA) is a prevalent mental health issue among adolescents, and vulnerable narcissism (VN) can exacerbate thiscondition. This study aims to investigate the impact of vulnerable narcissism on social anxie... Social anxiety (SA) is a prevalent mental health issue among adolescents, and vulnerable narcissism (VN) can exacerbate thiscondition. This study aims to investigate the impact of vulnerable narcissism on social anxiety in adolescents, specificallyfocusing on the mediating effects of self-concept clarity (SCC) and self-esteem (SE) in the relationship between vulnerablenarcissism and social anxiety. Through cluster sampling, a questionnaire survey was conducted among 982 students from threesecondary schools in two provinces. The data was analyzed using structural equation modeling (SEM). The results revealedthat there was a significant negative correlation between vulnerable narcissism and both self-concept clarity and self-esteem,while there was a significant positive correlation between vulnerable narcissism and social anxiety. Additionally, self-conceptclarity showed a significant positive correlation with self-esteem but had a negative correlation with social anxiety. Both selfconceptclarity and self-esteem played an intermediary role in the chain linking vulnerable narcissism to social anxiety. Thisstudy confirms the mediating role of both self-concept clarity and self-esteem in explaining how vulnerable narcissisminfluences social anxiety, providing valuable insights into its underlying mechanism. 展开更多
关键词 Social anxiety vulnerable narcissism self-concept clarity SELF-ESTEEM ADOLESCENT
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A Simple Embedding Method for the Laplace-Beltrami Eigenvalue Problem onImplicit Surfaces
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作者 Young Kyu Lee Shingyu Leung 《Communications on Applied Mathematics and Computation》 EI 2024年第2期1189-1216,共28页
We propose a simple embedding method for computing the eigenvalues and eigenfunctions of the Laplace-Beltrami operator on implicit surfaces.The approach follows an embedding approach for solving the surface eikonal eq... We propose a simple embedding method for computing the eigenvalues and eigenfunctions of the Laplace-Beltrami operator on implicit surfaces.The approach follows an embedding approach for solving the surface eikonal equation.We replace the differential operator on the interface with a typical Cartesian differential operator in the surface neighborhood.Our proposed algorithm is easy to implement and efficient.We will give some two-and three-dimensional numerical examples to demonstrate the effectiveness of our proposed approach. 展开更多
关键词 Laplace-Beltrami operator Level set method implicit representation EIGENVALUES Numerical PDEs
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Impaired implicit emotion regulation in patients with panic disorder:An event-related potential study on affect labeling
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作者 Hai-Yang Wang Li-Zhu Li +2 位作者 Yi Chang Xiao-Mei Pang Bing-Wei Zhang 《World Journal of Psychiatry》 SCIE 2024年第2期234-244,共11页
BACKGROUND Panic disorder(PD)involves emotion dysregulation,but its underlying mechanisms remain poorly understood.Previous research suggests that implicit emotion regulation may play a central role in PD-related emot... BACKGROUND Panic disorder(PD)involves emotion dysregulation,but its underlying mechanisms remain poorly understood.Previous research suggests that implicit emotion regulation may play a central role in PD-related emotion dysregulation and symptom maintenance.However,there is a lack of studies exploring the neural mechanisms of implicit emotion regulation in PD using neurophysiological indicators.AIM To study the neural mechanisms of implicit emotion regulation in PD with eventrelated potentials(ERP).METHODS A total of 25 PD patients and 20 healthy controls(HC)underwent clinical evaluations.The study utilized a case-control design with random sampling,selecting participants for the case group from March to December 2018.Participants performed an affect labeling task,using affect labeling as the experimental condition and gender labeling as the control condition.ERP and behavioral data were recorded to compare the late positive potential(LPP)within and between the groups.RESULTS Both PD and HC groups showed longer reaction times and decreased accuracy under the affect labeling.In the HC group,late LPP amplitudes exhibited a dynamic pattern of initial increase followed by decrease.Importantly,a significant group×condition interaction effect was observed.Simple effect analysis revealed a reduction in the differences of late LPP amplitudes between the affect labeling and gender labeling conditions in the PD group compared to the HC group.Furthermore,among PD patients under the affect labeling,the late LPP was negatively correlated with disease severity,symptom frequency,and intensity.CONCLUSION PD patients demonstrate abnormalities in implicit emotion regulation,hampering their ability to mobilize cognitive resources for downregulating negative emotions.The late LPP amplitude in response to affect labeling may serve as a potentially valuable clinical indicator of PD severity. 展开更多
关键词 Panic disorder implicit Emotion regulation Affect labeling Late positive potential
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Analysis of The Use of Implicit Nursing Knowledge in The Teaching of Cardiovascular Internal Medicine Nursing
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作者 Xianxiao Liu 《Journal of Clinical and Nursing Research》 2024年第4期191-196,共6页
Objective: To explore the utilization of implicit nursing knowledge in the teaching of cardiovascular internal medicine nursing and to provide a reference for improving the quality and efficiency of cardiovascular int... Objective: To explore the utilization of implicit nursing knowledge in the teaching of cardiovascular internal medicine nursing and to provide a reference for improving the quality and efficiency of cardiovascular internal medicine nursing work. Methods: Thirty-six trainee nurses working in the cardiovascular internal medicine department of our hospital from September 2022 to September 2023 were selected and randomly divided into a control group and an observation group of 18 trainees each. The control adopted the traditional teaching methods while the observation group adopted the implicit nursing knowledge in their clinical practice work. The assessment scores and teamwork ability of the two groups were analyzed and compared. Results: The performance of the observation group was better than that of the control group, and the difference between the two groups was statistically significant (P < 0.05). The teamwork ability of the observation group was significantly better than that of the control group in teamwork ability (P < 0.05). Conclusion: Implicit nursing knowledge teaching is conducive to the cultivation of high-quality nursing talents and meets the development needs of hospitals. Therefore, the importance of implicit nursing knowledge should be strengthened in the teaching of cardiovascular internal medicine nursing and it should be comprehensively organized to improve the quality of nursing services. 展开更多
关键词 implicit nursing knowledge Cardiovascular internal medicine Nursing teaching
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基于Implicit Wendroff差分格式的汽车线束导线串扰时域瞬态响应分析 被引量:1
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作者 王天皓 高印寒 +3 位作者 高乐 安占扬 马喜来 杨开宇 《吉林大学学报(工学版)》 EI CAS CSCD 北大核心 2017年第2期392-399,共8页
介绍了一种具有Implicit Wendroff差分格式的时域有限差分法,将其应用于汽车线束导线串扰的时域瞬态响应分析。由于该方法包含了隐式人工粘性项,可在一定程度上削弱由空间坐标离散化而产生的间断解处的非物理性振荡现象,提高了计算结果... 介绍了一种具有Implicit Wendroff差分格式的时域有限差分法,将其应用于汽车线束导线串扰的时域瞬态响应分析。由于该方法包含了隐式人工粘性项,可在一定程度上削弱由空间坐标离散化而产生的间断解处的非物理性振荡现象,提高了计算结果的准确性,同时由于不受稳定性条件的限制,使其计算效率得到大幅度提高。通过应用于非均匀双导体传输线系统和均匀三导体传输线系统的数值实验可知,在保证计算精度的同时,与传统的Leapfrog差分格式和显式Lax-Wendroff差分格式进行对比,其计算效率分别提高了60%和70%左右,明显优于其他两种方法。同时,本文给出了传输线上电压和电流的时空分布三维图,直观地表示出了传输线上电压和电流与时间和空间位置的变化关系。 展开更多
关键词 车辆工程 implicit Wendroff差分格式 串扰 时域瞬态分析
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A-high-order Accuraqcy Implicit Difference Scheme for Solving the Equation of Parabolic Type 被引量:7
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作者 马明书 王肖凤 《Chinese Quarterly Journal of Mathematics》 CSCD 2000年第2期94-97,共4页
In this paper,a implicit difference scheme is proposed for solving the equation of one_dimension parabolic type by undetermined paameters.The stability condition is r=αΔt/Δx 2 1/2 and the truncation error is o(... In this paper,a implicit difference scheme is proposed for solving the equation of one_dimension parabolic type by undetermined paameters.The stability condition is r=αΔt/Δx 2 1/2 and the truncation error is o(Δt 4+Δx 4) It can be easily solved by double sweeping method. 展开更多
关键词 equation of one_dimension parabolic type high_order accuracy implicit difference scheme
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重症脑卒中患者隐性误吸的影响因素及危险评估模型构建
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作者 周鹏飞 方娜娜 +2 位作者 姜宇辉 郭秀荣 支玉君 《中国实用神经疾病杂志》 2025年第1期78-82,共5页
目的分析重症脑卒中患者隐性误吸的现状及影响因素,并构建危险评估模型指导临床早期识别隐性误吸的高危人群。方法选取2021-01—2022-06亳州市人民医院收治的60例重症脑卒中患者,根据患者误吸发生情况分为误吸组28例和无误吸组32例。比... 目的分析重症脑卒中患者隐性误吸的现状及影响因素,并构建危险评估模型指导临床早期识别隐性误吸的高危人群。方法选取2021-01—2022-06亳州市人民医院收治的60例重症脑卒中患者,根据患者误吸发生情况分为误吸组28例和无误吸组32例。比较2组临床资料,采用Logistic回归分析确定隐性误吸的影响因素,并基于影响因素结果构建危险评估模型。结果60例重症脑卒中患者发生隐性误吸28例(46.67%)。误吸组年龄>70岁、GCS评分<9分、咳嗽反射减弱或消失、吞咽功能障碍、胃肠动力障碍、经鼻饲管喂养占比高于无误吸组(P<0.05)。多因素Logistic回归分析显示,年龄(OR=2.192,95%CI:1.157~4.154)、意识障碍(OR=2.787,95%CI:1.412~5.502)、吞咽功能障碍(OR=3.365,95%CI:1.412~8.019)、胃肠动力障碍(OR=2.502,95%CI:1.131~5.533)是重症脑卒中患者隐性误吸的影响因素(P<0.05)。基于该结果构建危险评估模型,模型总分0~5分,总分0~1分为低危,2~3分为中危,4~5分为高危。低危、中危、高危患者的隐性误吸发生率分别为6.25%、42.31%和88.89%,中危患者隐性误吸发生率高于低危患者,高危患者隐性误吸发生率高于中危和低危患者(P<0.05)。结论重症脑卒中患者隐性误吸的发生主要受年龄、意识障碍、吞咽功能障碍、胃肠动力障碍的影响,基于多因素Logistic回归分析构建危险评估模型可帮助临床早期识别误吸高危患者,并有利于针对性干预的实施,防治误吸的发生。 展开更多
关键词 重症脑卒中 隐性误吸 影响因素 危险评估模型 神经康复
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THE IMPLICIT CONTINUITY OF DISCONTINUOUS SYSTEMS
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作者 陆宇平 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 1995年第2期190-194,共5页
An example is presented to introduce the concept of implicit continuity proposed as contrasted with the explicit continuity.A sufficient and necessary condition of the implicit continuity is given and proved in forms ... An example is presented to introduce the concept of implicit continuity proposed as contrasted with the explicit continuity.A sufficient and necessary condition of the implicit continuity is given and proved in forms of implicit system.This condition also offers the solution of initial values at the points where the dynamic system is discontinuous.Some discussions are contributed to the physical significance of implicit continuity. 展开更多
关键词 CONTINUITY initial conditions implicit systems disconitinuous systems impulsive mode
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Implicit Love and Passionate Love-Contrast the Diction in "Song To Celia" by Ben Jonson and that in "The Canonization" by John Donne
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作者 梅进丽 《海外英语》 2012年第1X期222-223,共2页
Love is a permanent theme in the world's history of literature.With different dictions(choice of words),poets can portray diverse images of love,thus leaving completely distinct impression on the readers' mind... Love is a permanent theme in the world's history of literature.With different dictions(choice of words),poets can portray diverse images of love,thus leaving completely distinct impression on the readers' minds.By analyzing and contrasting the diction in "Song To Celia" by Ben Jonson and that in "The Canonization" by John Donne,this essay aims to illustrate that different dramatic effects could be achieved with different choices of words in creative writing,and diction could be a representative symbol of a poet's writing style. 展开更多
关键词 implicit LOVE passionate LOVE DICTION symbol
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Implicit Knowledge, Explicit Knowledge and Interaction in the College English Teaching
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作者 邹星 《海外英语》 2011年第10X期172-173,共2页
In each act or process of knowledge, all components can be classified into two kinds: tacit (implicit) components and focal (explicit) components. This article, first of all introduces the terms of implicit knowledge,... In each act or process of knowledge, all components can be classified into two kinds: tacit (implicit) components and focal (explicit) components. This article, first of all introduces the terms of implicit knowledge, explicit knowledge and their distinctions in the process of English language learning and then provides interactive instruction design to improve learners' communicative competence. 展开更多
关键词 implicit KNOWLEDGE INTERACTION COMMUNICATIVE COMPETENCE
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Implicit Learning and Explicit Learning in Second Language Vocabulary Acquisition
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作者 宋燕 王帅琪 《海外英语》 2019年第7期240-242,共3页
Implicit and explicit learning strategies of SL vocabulary acquisition are summarized based on precious studies and experiments. It is concluded that implicit learning strategies dolittlehelpto SL vocabulary acquisiti... Implicit and explicit learning strategies of SL vocabulary acquisition are summarized based on precious studies and experiments. It is concluded that implicit learning strategies dolittlehelpto SL vocabulary acquisition, but explicit learning strategies play a very important part in SL vocabulary acquisition. Besides, an assumption is proposed: the more obvious explicit learning is in vocabulary acquisition, the more words learners can acquire. It is hoped that this research has certain implications for SL learners and teaching. 展开更多
关键词 implicit LEARNING EXPLICIT LEARNING SL VOCABULARY ACQUISITION
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A Review of the Research on English Pronunciation Self-concept
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作者 张欣 《海外英语》 2021年第8期117-118,共2页
English pronunciation self-concept is a personal judgment based on pronunciation.It is English learners’self-perception as well as the judgment of their English pronunciation competence as well as pronunciation learn... English pronunciation self-concept is a personal judgment based on pronunciation.It is English learners’self-perception as well as the judgment of their English pronunciation competence as well as pronunciation learning ability,which is formed as they develop their skills in pronunciation.A higher level of English pronunciation self-concept can promote students’self-assurance in foreign language learning.Through the analysis,this paper summarizes the scholars’studies about English pronunciation self-concept as follows:1)Formation and characteristics of English pronunciation self-concept;2)Relevance between English pronunciation self-concept as well as English learning. 展开更多
关键词 English pronunciation self-concept formation and characteristics English learning
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基于隐性句逗号识别的汉语长句机器翻译
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作者 冯文贺 李熳佳 张文娟 《外语学刊》 北大核心 2025年第1期39-46,共8页
长句翻译一直是机器翻译的难题。本文根据汉语中相当数量的逗号和句号可相互转化的特点,提出“隐性句号”和“隐性逗号”概念,并实现其自动识别,以将汉语长句变为短句用于汉英机器翻译。为此,首先通过人工与半监督学习结合方法构建一个... 长句翻译一直是机器翻译的难题。本文根据汉语中相当数量的逗号和句号可相互转化的特点,提出“隐性句号”和“隐性逗号”概念,并实现其自动识别,以将汉语长句变为短句用于汉英机器翻译。为此,首先通过人工与半监督学习结合方法构建一个隐性句逗数据集,实现基于预训练模型的隐性句逗识别方法,其中性能最好的Hierarchical BERT作为后续应用模型。进而,实现基于隐性句逗识别的汉英机器翻译方法。在新闻和文学公开翻译测试语料上基于预训练机器翻译模型的实验表明,对于汉语长句的英译,本文方法相比基准翻译的BLEU值整体有所提高,而且在相对稳健机器翻译模型上,呈现为句子越长本文方法效果越明显。 展开更多
关键词 机器翻译 长句翻译 隐性句逗号 汉语长句 逗号识别 句内标点
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A truncated implicit high-order finite-difference scheme combined with boundary conditions 被引量:2
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作者 常锁亮 刘洋 《Applied Geophysics》 SCIE CSCD 2013年第1期53-62,118,共11页
In this paper, first we calculate finite-difference coefficients of implicit finite- difference methods (IFDM) for the first and second-order derivatives on normal grids and first- order derivatives on staggered gri... In this paper, first we calculate finite-difference coefficients of implicit finite- difference methods (IFDM) for the first and second-order derivatives on normal grids and first- order derivatives on staggered grids and find that small coefficients of high-order IFDMs exist. Dispersion analysis demonstrates that omitting these small coefficients can retain approximately the same order accuracy but greatly reduce computational costs. Then, we introduce a mirrorimage symmetric boundary condition to improve IFDMs accuracy and stability and adopt the hybrid absorbing boundary condition (ABC) to reduce unwanted reflections from the model boundary. Last, we give elastic wave modeling examples for homogeneous and heterogeneous models to demonstrate the advantages of the proposed scheme. 展开更多
关键词 implicit finite difference symmetric boundary condition high-order accuracy TRUNCATION absorbing boundary condition staggered grid numerical modeling
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A Teaching Case of Subject Clause Based on Implicit Learning
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作者 黎海英 《中学生英语》 2016年第42期17-18,共2页
The New English curriculum criteria suggest teaching English grammar based on the students’cognitive characteristics and emotional needs,helping them discover the rules and encouraging them to master the grammar by u... The New English curriculum criteria suggest teaching English grammar based on the students’cognitive characteristics and emotional needs,helping them discover the rules and encouraging them to master the grammar by using it.But due to the limited time in a lesson,many English teachers adopt a simple approach to teach grammar,in which students are required to memorize the rules first and then practice a lot.This approach is effec- 展开更多
关键词 A Teaching Case of Subject Clause Based on implicit Learning
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Carbody Structural Lightweighting Based on Implicit Parameterized Model 被引量:7
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作者 CHEN Xin MA Fangwu +1 位作者 WANG Dengfeng XIE Chen 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2014年第3期483-487,共5页
Most of recent research on carbody lightweighting has focused on substitute material and new processing technologies rather than structures. However, new materials and processing techniques inevitably lead to higher c... Most of recent research on carbody lightweighting has focused on substitute material and new processing technologies rather than structures. However, new materials and processing techniques inevitably lead to higher costs. Also, material substitution and processing lightweighting have to be realized through body structural profiles and locations. In the huge conventional workload of lightweight optimization, model modifications involve heavy manual work, and it always leads to a large number of iteration calculations. As a new technique in carbody lightweighting, the implicit parameterization is used to optimize the carbody structure to improve the materials utilization rate in this paper. The implicit parameterized structural modeling enables the use of automatic modification and rapid multidisciplinary design optimization (MDO) in carbody structure, which is impossible in the traditional structure finite element method (FEM) without parameterization. The structural SFE parameterized model is built in accordance with the car structural FE model in concept development stage, and it is validated by some structural performance data. The validated SFE structural parameterized model can be used to generate rapidly and automatically FE model and evaluate different design variables group in the integrated MDO loop. The lightweighting result of body-in-white (BIW) after the optimization rounds reveals that the implicit parameterized model makes automatic MDO feasible and can significantly improve the computational efficiency of carbody structural lightweighting. This paper proposes the integrated method of implicit parameterized model and MDO, which has the obvious practical advantage and industrial significance in the carbody structural lightweighting design. 展开更多
关键词 carbody structural lightweighting implicit parameterization MDO BIW
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高电压试验中的隐性危险分析
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作者 洛桑珠巴 罗桑云旦 《价值工程》 2025年第1期121-123,共3页
本研究围绕高电压试验环境下的隐性危险进行了深入探究。首先对高电压技术体系进行概述,解析其在各类试验中的应用与功能。随后,本文采用先进的危险识别与评估方法,结合实际的安全性数据分析,系统揭示了实验室与现场高电压试验中存在的... 本研究围绕高电压试验环境下的隐性危险进行了深入探究。首先对高电压技术体系进行概述,解析其在各类试验中的应用与功能。随后,本文采用先进的危险识别与评估方法,结合实际的安全性数据分析,系统揭示了实验室与现场高电压试验中存在的潜在危害。通过比较不同类型高电压试验的案例,本研究明确了隐性危险的具体表现和产生机理,为预防与控制策略的制定提供了科学依据。本文最终提出了一系列针对性的安全建议,为高电压试验的安全性提供了重要的理论支持和实践指导。 展开更多
关键词 高电压试验 隐性危险 危险评估 安全性数据 案例分析 预防措施
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AN IMPLICIT SERIES PRECISE INTEGRATION ALGORITHM FOR STRUCTURAL NONLINEAR DYNAMIC EQUATIONS 被引量:5
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作者 LiYuanyin JinXianlong WangYuanqing 《Acta Mechanica Solida Sinica》 SCIE EI 2005年第1期70-75,共6页
Nonlinear dynamic equations can be solved accurately using a precise integration method. Some algorithms exist, but the inversion of a matrix must be calculated for these al- gorithms. If the inversion of the matrix d... Nonlinear dynamic equations can be solved accurately using a precise integration method. Some algorithms exist, but the inversion of a matrix must be calculated for these al- gorithms. If the inversion of the matrix doesn’t exist or isn’t stable, the precision and stability of the algorithms will be afected. An explicit series solution of the state equation has been pre- sented. The solution avoids calculating the inversion of a matrix and its precision can be easily controlled. In this paper, an implicit series solution of nonlinear dynamic equations is presented. The algorithm is more precise and stable than the explicit series solution and isn’t sensitive to the time-step. Finally, a numerical example is presented to demonstrate the efectiveness of the algorithm. 展开更多
关键词 nonlinear dynamic system numerical integration precise integration method ex- ponential matrix implicit series solution
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2-D Numerical Simulation of Natural Gas Hydrate Decomposition Through Depressurization by Fully Implicit Method 被引量:4
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作者 宋永臣 梁海峰 《China Ocean Engineering》 SCIE EI 2009年第3期529-542,共14页
Natural gas hydrate, as a potential energy resource, deposits in permafrost and marine sediment with large quantities. The current exploitation methods include depressurization, thermal stimulation, and inhibitor inje... Natural gas hydrate, as a potential energy resource, deposits in permafrost and marine sediment with large quantities. The current exploitation methods include depressurization, thermal stimulation, and inhibitor injection. However, many issues have to be resolved before the commercial production. In the present study, a 2-D axisymmetric simulator for gas production from hydrate reservoirs is developed. The simulator includes equations of conductive and convective heat transfer, kinetic of hydrate decomposition, and multiphase flow. These equations are discretized based on the finite difference method and are solved with the fully implicit simultaneous solution method. The process of laboratory-scale hydrate decomposition by depressurization is simulated. For different surrounding temperatures and outlet pressures, time evolutions of gas and water generations during hydrate dissociation are evaluated, and variations of temperature, pressure, and multiphase fluid flow conditions are analyzed. The results suggest that the rate of heat transfer plays an important role in the process. Furthermore, high surrounding temperature and low outlet valve pressure may increase the rate of hydrate dissociation with insignificant impact on final cumulative gas volume. 展开更多
关键词 natural gas hydrate DEPRESSURIZATION fully implicit simuhaneoas solution method impact parameters analysis
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