The purpose of this paper is to present the rationale for registration of the Seated Condylar Position (SCP)/Centric Relation (CR) position of the condyles.
The purpose of this paper is to present the technique for registration of the Seated Condylar Position (SCP)/Centric Relation (CR) position of the condyles: a two-piece wax bite registration with deprogramming and no ...The purpose of this paper is to present the technique for registration of the Seated Condylar Position (SCP)/Centric Relation (CR) position of the condyles: a two-piece wax bite registration with deprogramming and no mandibular manipulation.展开更多
BACKGROUND:Pulmonary aspiration of gastric contents during tracheal intubation is a lifethreatening complication in emergency patients.Rapid sequence intubation is commonly performed to prevent aspiration but is not a...BACKGROUND:Pulmonary aspiration of gastric contents during tracheal intubation is a lifethreatening complication in emergency patients.Rapid sequence intubation is commonly performed to prevent aspiration but is not associated with low risk of intubation related complications.Although it has been considered that aspiration can be prevented in the lateral position,few studies have evaluated the ability to prevent aspiration.Moreover,this position is not always a favorable position for tracheal intubation.If aspiration can be prevented in a clinically relevant semi-lateral position,it may be advantageous.We assessed the ability to prevent aspiration in the lateral position and various degrees of the semi-lateral position using a vomiting-regurgitation manikin model.METHODS:A manikin's head was placed in the neutral,simple extension,or sniffing position.The amount of aspirated saline into the bronchi during simulated vomiting was measured at semilateral position angles of 0°to 90° in 10° increments.The difference in the vertical height between the mouth corner and the inferior border of the vocal cord was measured radiologically at each semilateral position in the three head-neck positions.RESULTS:Pulmonary aspiration was prevented at the ≥70°,≥80°,and 90° semi-lateral positions in the neutral,simple extension,and sniffing positions,respectively.The mouth was lower than the vocal cord in the semi-lateral position in which aspiration was prevented.CONCLUSION:The lateral or excessive semi-lateral position was necessary to protect the lung from aspiration in the head-neck positions commonly used for tracheal intubation.Prevention of aspiration was difficult within clinically relevant semi-lateral positions.展开更多
The automatic positioning control of mooring system for deepwater semi-submersible platform has become a key issue in the research and development field of deep-sea resources. The Dual-Stage Actuator (DSA) proposed in...The automatic positioning control of mooring system for deepwater semi-submersible platform has become a key issue in the research and development field of deep-sea resources. The Dual-Stage Actuator (DSA) proposed in this paper can replace the single actuator to achieve the high speed and high precision positioning by cooperative control. The relative model and control algorithm of motion trajectory (CAMT) are designed and validated, which proves that the method proposed in this paper is effective.展开更多
The automatic positioning control of mooring system for deepwater semi-submersible platform has become a key issue in the research and development field of deep-sea resources. The Dual- Stage Actuator (DSA) proposed i...The automatic positioning control of mooring system for deepwater semi-submersible platform has become a key issue in the research and development field of deep-sea resources. The Dual- Stage Actuator (DSA) proposed in this paper can replace the single actuator to achieve the high speed and high precision positioning by cooperative control. The relative model and control algorithm of motion trajectory (CAMT) are designed and validated, which proves that the method proposed in this paper is effective.展开更多
Understanding of the basic properties of the positive semi-definite tensor is a prerequisite for its extensive applications in theoretical and practical fields, especially for its square-root. Uniqueness of the square...Understanding of the basic properties of the positive semi-definite tensor is a prerequisite for its extensive applications in theoretical and practical fields, especially for its square-root. Uniqueness of the square-root of a positive semi-definite tensor is proven in this paper without resorting to the notion of eigenvalues, eigenvectors and the spectral decomposition of the second-order symmetric tensor.展开更多
One of the important problems of stochastic process theory is to define the Laplace transforms for the distribution of semi-markov random processes. With this purpose, we will investigate the semimarkov random process...One of the important problems of stochastic process theory is to define the Laplace transforms for the distribution of semi-markov random processes. With this purpose, we will investigate the semimarkov random processes with positive tendency and negative jump in this article. The first passage of the zero level of the process will be included as a random variable. The Laplace transforms for the distribution of this random variable is defined. The parameters of the distribution will be calculated on the basis of the final results.展开更多
Manually operated solar shades have a significant impact on indoor visual comfort.This research investigates occupants’appropriate seating position and view direction in a west-facing office cell using a previously d...Manually operated solar shades have a significant impact on indoor visual comfort.This research investigates occupants’appropriate seating position and view direction in a west-facing office cell using a previously developed shade behavior model.The non-dominant sorting genetic algorithm(NSGA-II)based Multi-objective optimization was adopted to identify the optimal and near optimal solutions.Daylight and glare index were used as two visual comfort objectives for optimization and robustness of optimization results against shade behavior uncertainty that was analyzed using statistical analysis.Results show that near optimal solutions can be used instead of the optimal one since they provide more flexibility in seating positions while maintaining almost the same visual comfort performance.And thus,the appropriate seating position considering occupants’preference is 1.5m away from the external window with two view directions near parallel to the window for west-facing office rooms.展开更多
目的探讨手法复位对位置性下跳眼震(positional down beat nystagmus,pDBN)伴眩晕患者的临床疗效。方法选取2019年1月至2023年12月北京中医药大学东直门医院通州院区pDBN伴眩晕患者33例,分析手法复位对pDBN伴眩晕患者的临床疗效。结果3...目的探讨手法复位对位置性下跳眼震(positional down beat nystagmus,pDBN)伴眩晕患者的临床疗效。方法选取2019年1月至2023年12月北京中医药大学东直门医院通州院区pDBN伴眩晕患者33例,分析手法复位对pDBN伴眩晕患者的临床疗效。结果33例患者中,男13例、女20例,年龄22~79岁,平均(55.8±15.5)岁。18例患者手法复位治疗有效,Yacovino法的有效率为33.3%(11/33),Yacovino联合半Semont法的有效率为21.2%(7/33)。其中4例在治疗过程中转化为典型后半规管良性阵发性位置性眩晕(benign paroxysmal positional vertigo,BPPV)。前半规管BPPV与对侧背地型后半规管BPPV的位置性眼震特点相似。结论Yacovino联合半Semont复位法可提高pDBN伴眩晕患者的诊断与复位治疗成功率。展开更多
文摘The purpose of this paper is to present the rationale for registration of the Seated Condylar Position (SCP)/Centric Relation (CR) position of the condyles.
文摘The purpose of this paper is to present the technique for registration of the Seated Condylar Position (SCP)/Centric Relation (CR) position of the condyles: a two-piece wax bite registration with deprogramming and no mandibular manipulation.
文摘BACKGROUND:Pulmonary aspiration of gastric contents during tracheal intubation is a lifethreatening complication in emergency patients.Rapid sequence intubation is commonly performed to prevent aspiration but is not associated with low risk of intubation related complications.Although it has been considered that aspiration can be prevented in the lateral position,few studies have evaluated the ability to prevent aspiration.Moreover,this position is not always a favorable position for tracheal intubation.If aspiration can be prevented in a clinically relevant semi-lateral position,it may be advantageous.We assessed the ability to prevent aspiration in the lateral position and various degrees of the semi-lateral position using a vomiting-regurgitation manikin model.METHODS:A manikin's head was placed in the neutral,simple extension,or sniffing position.The amount of aspirated saline into the bronchi during simulated vomiting was measured at semilateral position angles of 0°to 90° in 10° increments.The difference in the vertical height between the mouth corner and the inferior border of the vocal cord was measured radiologically at each semilateral position in the three head-neck positions.RESULTS:Pulmonary aspiration was prevented at the ≥70°,≥80°,and 90° semi-lateral positions in the neutral,simple extension,and sniffing positions,respectively.The mouth was lower than the vocal cord in the semi-lateral position in which aspiration was prevented.CONCLUSION:The lateral or excessive semi-lateral position was necessary to protect the lung from aspiration in the head-neck positions commonly used for tracheal intubation.Prevention of aspiration was difficult within clinically relevant semi-lateral positions.
文摘The automatic positioning control of mooring system for deepwater semi-submersible platform has become a key issue in the research and development field of deep-sea resources. The Dual-Stage Actuator (DSA) proposed in this paper can replace the single actuator to achieve the high speed and high precision positioning by cooperative control. The relative model and control algorithm of motion trajectory (CAMT) are designed and validated, which proves that the method proposed in this paper is effective.
文摘The automatic positioning control of mooring system for deepwater semi-submersible platform has become a key issue in the research and development field of deep-sea resources. The Dual- Stage Actuator (DSA) proposed in this paper can replace the single actuator to achieve the high speed and high precision positioning by cooperative control. The relative model and control algorithm of motion trajectory (CAMT) are designed and validated, which proves that the method proposed in this paper is effective.
文摘Understanding of the basic properties of the positive semi-definite tensor is a prerequisite for its extensive applications in theoretical and practical fields, especially for its square-root. Uniqueness of the square-root of a positive semi-definite tensor is proven in this paper without resorting to the notion of eigenvalues, eigenvectors and the spectral decomposition of the second-order symmetric tensor.
文摘One of the important problems of stochastic process theory is to define the Laplace transforms for the distribution of semi-markov random processes. With this purpose, we will investigate the semimarkov random processes with positive tendency and negative jump in this article. The first passage of the zero level of the process will be included as a random variable. The Laplace transforms for the distribution of this random variable is defined. The parameters of the distribution will be calculated on the basis of the final results.
基金supported by the National Natural Science Foundation of China under Grant No.51878358Natural Science Foundation of Zhejiang Province under Grant No.LY18E080012National Key Technology R&D Program of the Ministry of Science and Technology under Grant 2013BAJ10B06.
文摘Manually operated solar shades have a significant impact on indoor visual comfort.This research investigates occupants’appropriate seating position and view direction in a west-facing office cell using a previously developed shade behavior model.The non-dominant sorting genetic algorithm(NSGA-II)based Multi-objective optimization was adopted to identify the optimal and near optimal solutions.Daylight and glare index were used as two visual comfort objectives for optimization and robustness of optimization results against shade behavior uncertainty that was analyzed using statistical analysis.Results show that near optimal solutions can be used instead of the optimal one since they provide more flexibility in seating positions while maintaining almost the same visual comfort performance.And thus,the appropriate seating position considering occupants’preference is 1.5m away from the external window with two view directions near parallel to the window for west-facing office rooms.
