Jiangsu Posts and Telecommunications Planning and Designing Institute Co.

Nanjing, China

Jiangsu Posts and Telecommunications Planning and Designing Institute Co.

Nanjing, China
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Weiguo J.,Jiangsu Posts and Telecommunications Planning and Designing Institute Co. | Shanguo H.,Beijing University of Posts and Telecommunications | Jie Z.,Beijing University of Posts and Telecommunications | Yunfan Z.,Jiangsu Posts and Telecommunications Planning and Designing Institute Co. | Chenming Z.,Jiangsu Posts and Telecommunications Planning and Designing Institute Co.
ICOCN 2016 - 2016 15th International Conference on Optical Communications and Networks | Year: 2016

We propose a spectrum allocation algorithm for time-varying traffic in Flexible Grid Optical Networks considering the correlations among traffic variations. The algorithm achieves lower blocking probability and minimize number of disruptions to the live connections. © 2016 IEEE.


Zhao X.,Nanjing University of Posts and Telecommunications | Zhao X.,Jiangsu Posts and Telecommunications Planning and Designing Institute Co. | Chen S.,Nanjing University of Posts and Telecommunications | Guo J.,Nanjing University of Posts and Telecommunications | And 2 more authors.
International Journal of Distributed Sensor Networks | Year: 2017

Power control technology is widely used in wireless sensor networks to improve network performance. The asymmetric transmission power strategy used in power control technology causes the re-emergence of hidden-node problems and more serious exposed-node problems. This article analyzes the reasons of these problems and proposes the concept of the pan-hidden node and pan-exposed node. To avoid pan-hidden-node problems and mitigate pan-exposednode problems, a concurrent transmission mechanism is presented. The concurrent transmission mechanism contains a strict time schedule for different categories of frames and an interference degree criterion to ensure concurrent transmission. The rigorous time schedule can guarantee that different classes of frames do not interfere with one another. The interference among the frames of the same type is constrained by the interference degree criterion. Finally, the performance of the concurrent transmission mechanism is evaluated using simulation experiments. © The Author(s) 2017.


Jing D.-H.,Nanjing Southeast University | Cao S.-Y.,Nanjing Southeast University | Zhou H.-T.,Jiangsu Posts and Telecommunications Planning and Designing Institute Co.
Advanced Materials Research | Year: 2011

The steel-plate-masonry composite structure is an innovative type of structural scheme popular in masonry structures with load-bearing walls removed for a large space. A total of 4 column specimens under static loading were tested to mainly study the failure modes, load-carrying capacity, and strain distribution in the critical cross-section. Results show that the composite columns started an initial failure from local buckling of the steel plate located between binding bolts; the main factors influencing load-carrying capacity included thickness of the steel plate, type of injected material, and initial column eccentricity; the working performance of the composite column with epoxy adhesive was better than that with cement grout; and re-distribution of compressive stress existed in the steel plates of the column. Also, the ratio of service load-carrying capacity to ultimate capacity of the steel-plate-masonry composite column is about 70%. © (2011) Trans Tech Publications, Switzerland.


Tan J.,Nanjing Southeast University | Tan J.,Jiangsu Posts and Telecommunications Planning and Designing Institute Co. | Wang B.,Nanjing Southeast University | Li Y.,Nanjing Southeast University
Dianli Xitong Zidonghua/Automation of Electric Power Systems | Year: 2014

Assessment of the comprehensive value of the demand response resources is beneficial to the implementing agency in grasping the implementation effect of demand project and to the participants in learning about their input and returns. System dynamics provides a more systematic method, better dynamics and more distinct causal feedback relations for comprehensive benefits evaluation of the demand response. After defining the participants and implementation costs and benefits of the demand response and the effect of external returns, attention is focused on access to renewable energy and electric vehicles. Then an elaborate simulation model containing price-based and incentive-based programs is developed. The rationality and effectiveness of the model is verified by simulation. All participants benefit from demand response programs and interact with each other. External benefits internalized help promote comprehensive performance of the demand response. © 2014 State Grid Electric Power Research Institute Press


Liu C.,Xi'an University of Architecture and Technology | Bai G.,Xi'an University of Architecture and Technology | Yin L.,Jiangsu Posts and Telecommunications Planning and Designing Institute Co. | Feng X.,Shenzhen Construction Group Company
Tumu Gongcheng Xuebao/China Civil Engineering Journal | Year: 2014

Crack width of recycled concrete beams were investigated experimentally under long-term loading. The variation of crack width with time for recycled concrete at different replacement rates was analyzed and compared. Results show that under long-term loading, the cracking pattern of recycled concrete beam with high replacement rate is more complicated and random than that of recycled concrete beam with low replacement rate. The branching and converging of cracks is more likely to occur in recycled concrete beam with high replacement rate than in that with low replacement rate. The rapid growth period of crack width in recycled aggregate concrete beam is obviously prolongated and increasedcompared to normal concrete beam. By analyzing additional time-varying coefficient of crack width, the long-term enlargement coefficient for different replacement rates is proposed, and calculation formula of maximum crack width suitable for recycled aggregate concrete beam under long-term loading is established.


Huang Z.,Nanjing Southeast University | Li Z.,Nanjing Southeast University | Ding T.,Jiangsu Posts and Telecommunications Planning and Designing Institute Co.
Journal of Southeast University (English Edition) | Year: 2013

To develop a high performance buckling-restrained brace (BRB) with less weight, an innovative type of the BRB with transverse rib restraints is proposed and studied through experiment. Three BRB specimens are cyclically loaded in the investigation. Specimen 1 adopts a Q235 core member and transverse rib restraints. Specimen 2 adopts a LYP160 low yield point steel core member and transverse rib restraints. Specimen 3 adopts a LYP160 low yield point steel core member and mortar restraint. The experimental results indicate that the transverse rib restraining mode can provide sufficient lateral stiffness for the core member and effectively restrain its buckling. The BRB specimens with a LYP160 core member exhibit better hysteretic performance and energy dissipation capacity than the specimens with a Q235 core member. © right.


Yang D.-C.,Nanchang University | He H.,Jiangsu Posts and Telecommunications Planning and Designing Institute Co.
Yingyong Kexue Xuebao/Journal of Applied Sciences | Year: 2014

In this paper, an optimal precoding is designed for multi-cell multi-user MIMO networks. It is proposed to expand a block diagonalization method of single cell to the multi-cell situation. Considering interference leakage to out-of-cell users, a channel projection based block diagonalization (BD) method is used in designing the precoding. Using the extra-space freedom degree offered on the transmitting side, the transmit signal is preprocessed with a cell-based signal-to-leakage-plus-noise ratio (SLNR) maximization criterion, which can compromise the target user signal and leakage interference to suppressed interference. Moreover, a traditional subspace zero forcing procedure is proceeded to mitigate the interference among intra-cell users. Thus, negative factors of the inter-cell interference for the multi-user MIMO system can be suppressed. Compared to the classical interference leakage zero forcing algorithm, it can flexibly adjust the freedom for inter-cell interference suppression, balance relationship between interference suppression and system capacity enhancement. Moreover, under the same interference, the capacity can be doubled. Both theoretical analysis and simulation indicate that the proposed methods can efficiently suppress interference while keeping low complexity without changing topology of the current systems.


Zhang X.,China Electronics Technology Group Corporation | Zhang X.,PLA University of Science and Technology | Yang J.,China Electronics Technology Group Corporation | Du S.,China Electronics Technology Group Corporation | Huang S.,Jiangsu Posts and Telecommunications Planning and Designing Institute Co.
Mathematical Problems in Engineering | Year: 2013

As we all know, relevant data during software life cycle can be used to analyze and predict software reliability. Firstly, the major disadvantages of the current software reliability models are discussed. And then based on analyzing classic PSO-SVM model and the characteristics of software reliability prediction, some measures of the improved PSO-SVM model are proposed, and the improved model is established. Lastly, simulation results show that compared with classic models, the improved model has better prediction precision, better generalization ability, and lower dependence on the number of samples, which is more applicable for software reliability prediction. © 2013 Zhang Xiaonan et al.


Liu C.,Xi'an University of Architecture and Technology | Bai G.-L.,Xi'an University of Architecture and Technology | Yin L.,Jiangsu Posts and Telecommunications Planning and Designing Institute Co.
Gongcheng Lixue/Engineering Mechanics | Year: 2014

Based on long-term crack width experiments on recycled aggregate concrete(RAC) beams with different recycled material replacement rates, the development of crack widths over time between the different beams was compared. The results show that the period of rapid cracking growth is postponed in recycled aggregate concrete beams, and also of longer duration than in normal concrete beams. The internal lever arm coefficient, average crack spacing, and steel strain non-uniformity coefficient were fitted, and a formula for calculating maximum short-term crack width is established. Its calculation results have satisfactory precision. After analyzing additional crack width time-varying coefficients, formula for maximum crack width an RAC beam with varying replacement rates is established.


Zong Z.,Jiangsu Posts and Telecommunications Planning and Designing Institute Co.
Applied Mechanics and Materials | Year: 2013

In the complex grid market environment, inhibiting the malicious behavior of grid nodes, taking punishment and incentives and guaranteeing the quality of the grid service are all important issues, which are must be resolved by the grid service market. This paper analyses the framework of the virtual network trust module. Combined with virtual domains combinatorial auction introduced into the process of trust building, this paper proposes a trust module, which finds the efficiency of trust and acts a good inhibition of a single malicious mode behavior. © (2013) Trans Tech Publications, Switzerland.

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