Zhe Jun Yuan

Position reconstruction and surface background model for the PandaX-4T detector

Zhicheng Qian, Linhui Gu, Cheng Chen, Zihao Bo et autres

We report the position reconstruction methods and surface background model for the PandaX-4T dark matter direct search experiment. This work develops two position reconstruction algorithms: template matching (TM) method and photon acceptance function (PAF) method. Both methods determine the horizontal position of …

Search for Double Beta Decay of $^{136}$Xe to the $0^+_1$ Excited State of $^{136}$Ba with PandaX-4T

PandaX Collaboration, Lingyin Luo, Zihao Bo, Wei Chen et autres

We perform a search of double beta decay of $^{136}$Xe to the excited state, $0^+_1$, of $^{136}$Ba (2$νββ$-0$_1^+$), using the dual-phase xenon detector of PandaX-4T with the first 94.9-day commissioning data. The multi-site events are reconstructed up to the MeV energy scale, …

Economic Optimization of Thermal Insulation Thickness for Insulated and Electrically Traced Pipelines in Drilling Applications

Meng Xu, Meng Gao, Ruitong Yang, Keping Wang et autres

This study presents an economic optimization model for determining the optimal insulation thickness for both thermal insulation and electric tracing pipelines. Using Life-Cycle Cost (LCC) analysis, optimization research was conducted under various working conditions to identify the most cost-effective insulation thickness. Factors …

cn (code pays fourni par la source)

Problems caused by insulated overhead transmission line in medium-voltage system and the prevention methods

Jingyi Huang, M. Gu, Zipeng Hu, Zequn Liu et autres

In order to enhance the safe operation of medium-voltage distribution system, insulated coating is used to cover the transmission line. However, some problems are activated by the insulated overhead transmission line. Lightning-caused breakage of transmission line and lightning overvoltage are two problems …

bg, cn (code pays fourni par la source)

On-Chip Cascaded Bandpass Filter and Wavelength Router Using an Intelligent Algorithm

Hongyi Yuan, Lifeng Ma, Zhe Jun Yuan, Shuai Feng et autres

Cascaded nanophotonic devices play a vital role in all-optical connection, all-optical computation and all-optical network. However, there is almost no effective method for the direct design of on-chip cascaded nanophotonic devices, since current study of nanophotonic devices mostly focuses on single device. …

cn (code pays fourni par la source)

On-Chip Ultra-Small Arbitrary-Elliptical-Polarization Converters

Zhe Jun Yuan, Shuai Feng, Weizhen Liu, Zhouhui Liu et autres

On-chip arbitrary-elliptical-polarization converter plays a key role in optical information processing. However, the traditional method of manually adjusting parameters for designing devices is limited in function. In this letter, on-chip ultra-small arbitrary-elliptical-polarization converters are realized through optimization algorithms based on genetic algorithm …

cn (code pays fourni par la source)

Modeling Planar Joints With Clearance Between the Guide and Roller in Mechanisms

Yunkai Gao, Yuexing Duan, James Yang, Zhe Jun Yuan et autres

Abstract In mechanisms, the guide and roller form joints with clearance and the roller may make contact with the convex surface or concave surface of the guide. Correctly modeling this type of joint is critical in a mechanism's dynamic performance analysis. This …

cn, us (code pays fourni par la source)

Experimental studies on effects of temperature on oil and water relative permeability in heavy-oil reservoirs

Yongbin Wu, Pengcheng Liu, Fajun Zhao, Zhe Jun Yuan

A heavy-oil sample derived from a block of Venezuelan oil was used to investigate effects of temperature on relative permeability to oil and water. Measurements of relative permeability were based on one-dimensional core-flow simulated systems using an unsteady-state technique at different temperatures, …

cn (code pays fourni par la source)

Experimental study on viscosity reducers for SAGD in developing extra-heavy oil reservoirs

Xiuluan Li, Lanxiang Shi, Li Haozhe, Pengcheng Liu et autres

cn (code pays fourni par la source)

A new jig-shape optimization method for the high aspect ratio wing

Zhe Jun Yuan, Shihui Huo, Jianting Ren

Purpose Computational efficiency is always the major concern in aircraft design. The purpose of this research is to investigate an efficient jig-shape optimization design method. A new jig-shape optimization method is presented in the current study and its application on the high …

cn (code pays fourni par la source)

Experimental study and numerical simulation of nitrogen-assisted SAGD in developing heavy oil reservoirs

Zhe Jun Yuan, Pengcheng Liu, Shengfei Zhang, Xiuluan Li et autres

cn (code pays fourni par la source)

Parameter optimization of gas alternative water for CO2 flooding in low permeability hydrocarbon reservoirs

Pengcheng Liu, Xiaokun Zhang, Mingqiang Hao, Jiaqi Liu et autres

The parameters influencing gas alternative water (WAG) for CO2 flooding in the low permeability block of the Jilin oil fields in China were investigated using the numerical simulation software, Eclipse. The minimum miscibility pressure was first determined based on slim tube tests. …

cn (code pays fourni par la source)