It is well known that it often leads to large error to calculate the first order partial derivatives of physical quantities by the difference method from observation data with error. Especially in meteorology, observational wind has large error, and calculating vorticity from observational wind is very inaccurate. Therefore, one-dimensional numerical differentiation algorithm is applied to calculate vorticity from observational wind, and the result is compared with that of the central difference method. It turns out that the one-dimensional numerical differentiation algorithm is stable and feasible. Its accuracy is superior to the central difference method, and it has stronger recognizing ability for the smaller-scale weather systems.

10.7498/aps.57.3912

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Citations (15)

Monte Carlo simulation of photopolymerizable ceramic suspension curing profile in vat photopolymerization

Journal of the European Ceramic Society (2024)

Zhangjing Yu Zhiguo Wang Xuehua Yu Yichao Wang Ke Zhong

UV-Curing

Suspension

10.1016/j.jeurceramsoc.2023.12.102

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Selection of Heat Recovery Ventilators in Different Climate Zones of China

Ke Zhong

Considering four different climate zones in China, an investigation on the choice of heat recovery ventilator for the buildings with little moisture emissions is carried out. The annual composition of energy consumption of air intake for per unitary air ventilation flow rate is evaluated by employing the testing data of climatic parameters in eight selected cities. The analysis shows that the total heat recovery is suitable in a controlled ventilation system with air humidity controlled during heating period of all the climates. For the building without air humidity controlled in winter, the sensible heat recovery ventilators can be used in severe cold and cold regions, and total heat recovery systems are more suitable for energy saving in hot summer and cold winter and hot summer and warm winter regions.

Cold winter

Energy recovery ventilation

Cold climate

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原子力発電所のデジタル制御システムソフトウェア信頼性の定量的評価研究【JST・京大機械翻訳】

He Kexue yu Gongcheng (2020)

Huang Qi Zhang Qing Liu Mingxing Yuanbing Wang Ke Zhong

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Developmental Morphology of the Intermuscular Bone in Hypophthalmichthys molitrix

Dongwuxue zazhi (2008)

Ke Zhong

To further understand the development process of intermuscular bones in teleosts, a modified bone clearing and staining experiment was conducted to investigate morphological development of intermuscular bone in silver carp Hypophthalmichthys molitrix. It is showed that intermuscular bone has different shapes including I type, one-end-unequal-bifork type (卜type), one-end-equal-bifork type (y type), one-end-multifork type, two-end-multifork type, and tree-branch type. Generally, the morphological complexity of most intermuscular bones in anterior body was more than that in posterior body. The initial ossification of intermuscular bone is observed in the posterior part of the body at 43 dpf, and then each of the intermuscular bones is ossified anteriorly, and the morphological characters at 55 dpf are the same as those found in adult fish. The minimum length of silver carp with first ossified epineural bone is 10.50 mm, and with first ossified epipleural bone is 13.66 mm. The primary morphology of intermuscular bone is I type, and more complicated morphology of ossified intermuscular bones are gradually derived from I type during ossifing process. This study provides some very important information about the morphological development of intermuscular bone in silver carp, which will be helpful for us to further understand the molecular mechanism underlying intermuscular bone development.

Hypophthalmichthys

Fish bone

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Citations (19)