Structural System Selection and Highlights of Changsha IFC T1 Tower

Jianlong, Zhou,Daoyuan, Lu,Liang, Huang,Jun, Ji,Jun, Zhu,Jingyu, Wang Council on Tall Building and Urban Habitat Korea 2014 International journal of high-rise buildings Vol.3 No.2

This paper presents the determination of the structural system of the Changsha IFC T1 tower with 452 m in architectural height and 440.45 m in structural height. Sensitivity analyses are carried out by varying the location of belt trusses and outriggers. The enhancement of seismic capacity of the outer frame by reasonably adjusting the column size is confirmed based on parametric studies. The results from construction simulation including the non-load effect of structures demonstrate that the deformation of vertical members has little effect on the load-bearing capacity of belt trusses and outriggers. The elastoplastic time-history analysis shows that the overall structure under rare earthquake load remains in an elastic state. The influence of the frame shear ratio and frame overturning moment ratio on the proposed model and equivalent mega column model is investigated. It is found that the frame overturning moment ratio is more applicable for judging the resistance of the outer frame against lateral loads. Comparison is made on the variation of these two effects between a classical frame-core tube-outrigger structure and a structure with diagonal braces between super columns under rare earthquakes. The results indicate that plasticity development of the top core cube of the braced structure may be significantly improved.

Analysis on Device Mechanism and Numerical Simulation of Composite Air Purification

Jianlong Liu,Peng Liu,Li Liu,Haiping Zhang 보안공학연구지원센터 2016 International Journal of Hybrid Information Techno Vol.9 No.12

To solve the technical problems existing in air purification, a multileveled air purification device is presented. And the new device consists of catalytic purifying technology, low-temperature plasma, nanoscaled titania and dual-band ultraviolet. To deeply take a research on performance of the composite purification device, the device has been numerically simulated, with CFD simulation technology, through employing gas phase turbulence model, porous medium model and stochastic particle trajectory model. Comparative analyses on pressure distribution of internal flow field, velocity distribution, particle motion state and mass concentration distribution are made under different wind speed. The most appropriate wind speed can provide better centrifugal effect and less pressure loss. So some rules of velocity, pressure distribution and the particulate mass concentration distribution at all levels after filtering in internal device are acquired. In the meanwhile, a comparison among different research results has been made, and it helps to prove the reliability of this method.

Secondary Side Output Voltage Stabilization of an IPT System by Tuning/Detuning through a Serial Tuned DC Voltage-controlled Variable Capacitor

Jianlong Tian,Aiguo Patrick Hu,Sing Kiong Nguang 전력전자학회 2017 JOURNAL OF POWER ELECTRONICS Vol.17 No.2

This paper proposes a method to stabilize the output voltage of the secondary side of an Inductive Power Transfer (IPT) system through tuning/detuning via a serial tuned DC Voltage-controlled Variable Capacitor (DVVC). The equivalent capacitance of the DVVC changes with the conduction period of a diode in the DVVC controlled by DC voltage. The output voltage of an IPT system can be made constant when this DVVC is used as a variable resonant capacitor combined with a PI controller generating DC control voltage according to the fluctuations of the output voltage. Since a passive diode instead of an active switch is used in the DVVC, there are no active switch driving problems such as a separate voltage source or gate drivers, which makes the DVVC especially advantageous when used at the secondary side of an IPT system. Moreover, since the equivalent capacitance of the DVVC can be controlled smoothly with a DC voltage and the passive diode generates less EMI than active switches, the DVVC has the potential to be used at much higher frequencies than traditional switch mode capacitors.

Characterization of the global transcriptome and microsatellite marker information for spotted halibut Verasper variegatus

Jianlong Ge,Siqing Chen,Changlin Liu,Li Bian,Huiling Sun,Jie Tan 한국유전학회 2017 Genes & Genomics Vol.39 No.3

The spotted halibut Verasper variegatus is an economically important flatfish species distributed in Japan, Korea and China. However, the genomic resources regarding this species were scarcity, which hindered our understanding of the genetics and biological mechanisms in spotted halibut. In this study, we examined the global transcriptome from six major tissues of spotted halibut. Approximately 40 million of high quality reads were generated using Illumina paired-end sequencing technology. More than 9 Gbp data were generated, and de novo assembled into 59,235 unigenes, with an N50 of 938 bp. Based on sequence similarity search with known protein database, 34,084 (57.5%) showed significant similarity to known proteins in Nr database, and 28,875 (48.7%) had BLAST hits in Swiss-Prot database. 19,562 and 23,037 unigenes were assigned into gene ontology categories and clusters of orthologous group, respectively. 9138 unigenes were mapped to 211 KEGG pathways. For functional marker development, 13,322 candidate simple sequence repeats were identified in the transcriptome and 7235 primer pairs were successfully designed. Among 72 primer pairs selected for validation, 67 (93.1%) were successful in PCR amplification and 14 (19.4%) exhibited obvious repeat length polymorphisms in a culture spotted halibut population. The transcriptomic data and microsatellite markers will provide valuable resources for future functional gene analyses, genetic map construction, and quantitative trait loci mapping in V. variegatus.

Effect of Salts on the Thermal Stability of Physically Crosslinked Gelatin Hydrogels

Jianlong Zhang,Congde Qiao,Xianguang Ma,Weiliang Liu,Qinze Liu 한국고분자학회 2017 폴리머 Vol.41 No.4

The effects of preparation conditions, such as polymer concentration, annealing temperature, annealing time and pH, on the melting behavior of gelatin gels were investigated. An optimum condition of gel preparation for calorimetric test is obtained. In addition, the influence of salt including salt concentration and salt type on the melting behavior of gelatin gels was explored by DSC and rheometer. It was found that the melting temperature first increased and then decreased with an increase in salt concentration. This result indicates that electrostatic interactions are important for the formation and stability of gelatin gels. Moreover, the melting temperature of polymer gels with different salt addition conforms to the following orders: Na<SUP>+</SUP><Ca<SUP>2+</SUP><Cr<SUP>3+</SUP>. The different trend observed in respect of the storage modulus indicated that the triple helices dominated the gelatin gel strength, and the binding mechanism of Ca2+ may be different from that of Cr<SUP>3+</SUP>.

Socially Aware Device-to-multi-device User Grouping for Popular Content Distribution

( Jianlong Liu ),( Wen’an Zhou ),( Lixia Lin ) 한국인터넷정보학회 2020 KSII Transactions on Internet and Information Syst Vol.14 No.11

The distribution of popular videos incurs a large amount of traffic at the base stations (BS) of networks. Device-to-multi-device (D2MD) communication has emerged an efficient radio access technology for offloading BS traffic in recent years. However, traditional studies have focused on synchronous user requests whereas asynchronous user requests are more common. Hence, offloading BS traffic in case of asynchronous user requests while considering their time-varying characteristics and the quality of experience (QoE) of video request users (VRUs) is a pressing problem. This paper uses social stability (SS) and video loading duration (VLD)-tolerant property to group VRUs and seed users (SUs) to offload BS traffic. We define the average amount of data transmission (AADT) to measure the network’s capacity for offloading BS traffic. Based on this, we formulate a time-varying bipartite graph matching optimization problem. We decouple the problem into two subproblems which can be solved separately in terms of time and space. Then, we propose the socially aware D2MD user selection (SA-D2MD-S) algorithm based on finite horizon optimal stopping theory, and propose the SA-D2MD user matching (SA-D2MD-M) algorithm to solve the two subproblems. The results of simulations show that our algorithms outperform prevalent algorithms.

Flow Field Analysis of Lubricating Air Film in Aerostatic Restrictor with Double U-shaped Pressure-Equalizing Grooves

Jianlong Yin,Jing Yu,Cheng Lou,Dongsheng Li,Xiaoyan Shen,Ming Li 한국정밀공학회 2023 International Journal of Precision Engineering and Vol.24 No.2

In an aerostatic restrictor, the presence of friction between the high-pressure air and the aerostatic restrictor wall can lead to non-uniform pressure and temperature distributions of the lubricating air film, which will affect the aerostatic restrictor performance. Therefore, explicating the pressure and temperature distributions of the lubricating air film could help to improve the characteristics and performance of the aerostatic restrictor. In this study, a theoretical model is established for the pressure and temperature distributions in the aerostatic restrictor with double U-shaped pressure-equalizing grooves, which is then compared with simulations, and finally verified by experiments. The results indicate the following. (1) The parameter distributions of the aerostatic restrictor’s air film are affected by the pressure-equalizing grooves and the orifice. (2) The air film parameter distributions are affected by the air source pressure and air film thickness. (3) The air film parameter distribution characteristics obtained from theoretical calculations, simulations, and experiments are consistent, indicating that the theoretical model is effective for studying the flow field of lubricating air film in the aerostatic restrictor. This model can also provide a theoretical basis for designing the orifice and pressure-equalizing grooves of the aerostatic restrictor, as well as selecting the air source pressure and air film thickness.

Source Apportionment of Lead and Cadmium in Cropland Near a Contaminated Site: A Combined Approach of Positive Matrix Factorization and Geostatisticalanalysis

Jianlong Xue,Yuyou Zhi,Jiachun Shi,Laosheng Wu,Lingzao Zeng 한국토양비료학회 2014 한국토양비료학회 학술발표회 초록집 Vol.2014 No.6

Study on Structural Efficiency of Super-Tall Buildings

Jianlong, Zhou,Lianjin, Bao,Peng, Qian Council on Tall Building and Urban Habitat Korea 2014 International journal of high-rise buildings Vol.3 No.3

Based on a 405m high super-tall building, the influence of outriggers, different shapes and layouts of structural plane and elevation on structural efficiency under lateral forces is studied in this paper. A calculation formula concerning the structural efficiency is given. The study shows that structural efficiency can be improved by triangulating the plane shape, using mega columns, the peripherization of the plane layout, tapering the elevation shape and setting bracing structure in the elevation. The arrangement of outriggers between the core tube and flange frame can reduce the shear lag effect in order to improve structural efficiency. The essence of improving structural efficiency of super-tall buildings is to maximize the plane bending stiffness and to make its deformation approach to plane section assumption.

Secondary Side Output Voltage Stabilization of an IPT System by Tuning/Detuning through a Serial Tuned DC Voltage-controlled Variable Capacitor

Tian, Jianlong,Hu, Aiguo Patrick,Nguang, Sing Kiong The Korean Institute of Power Electronics 2017 JOURNAL OF POWER ELECTRONICS Vol.17 No.2

This paper proposes a method to stabilize the output voltage of the secondary side of an Inductive Power Transfer (IPT) system through tuning/detuning via a serial tuned DC Voltage-controlled Variable Capacitor (DVVC). The equivalent capacitance of the DVVC changes with the conduction period of a diode in the DVVC controlled by DC voltage. The output voltage of an IPT system can be made constant when this DVVC is used as a variable resonant capacitor combined with a PI controller generating DC control voltage according to the fluctuations of the output voltage. Since a passive diode instead of an active switch is used in the DVVC, there are no active switch driving problems such as a separate voltage source or gate drivers, which makes the DVVC especially advantageous when used at the secondary side of an IPT system. Moreover, since the equivalent capacitance of the DVVC can be controlled smoothly with a DC voltage and the passive diode generates less EMI than active switches, the DVVC has the potential to be used at much higher frequencies than traditional switch mode capacitors.