In order to prolong the lifetime of wireless sensor networks, this paper presents a multihop routing protocol with unequal clustering (MRPUC). On one hand, cluster heads deliver data base station relay reduce energy consumption. other MRPUC uses many measures balance nodes. First, it selects nodes more residual as heads, and clusters closer have smaller sizes preserve some during intra-cluster communication for inter-cluster packets forwarding. Second, when regular join clusters, they...

The axial compressive performance of novel L‐shaped and T‐shaped concrete‐filled square steel tube (L/T‐CFSST) column was assessed in this study. Ten L/T‐CFSST columns were tested to failure under load. experimental data used determine various modes, bearing capacities, load‐displacement curves. test parameters included the section form, thickness, yield strength, slenderness ratio. proved favorable, each showed strong cooperative performance. mode stub specimen ( H/D ≤ 3) strength caused by...

Special-shaped concrete-filled steel tube (SS-CFST) columns can be embedded in the wall, thus preventing from protruding. This feature makes it popular residential buildings. paper proposes a new special-shaped square (SS-CFSST) composite column composed of multiple tubes connected by hoops to form L-, T- or cross-shaped sections. Eight specimens were tested under axial loads with section shape, construction method, slenderness ratio, thickness, and strength as variation parameters. The...

As a common building insulation material, foamed concrete has been widely used in engineering practice. However, the contradiction between compressive strength and thermal conductivity become main problem limiting development application of concrete. Therefore, high-performance foam (HPFC) with high low was prepared by using graphene oxide (GO), fly ash, polypropylene (PP) fiber as admixtures, taking strength, conductivity, microstructure indices. Scanning electron microscopy, X-ray...

Combining the passive decoy-state idea with active idea, a non-orthogonal (SARG04) protocol one vacuum and two weak decoy states is introduced based on heralded pair coherent state photon source for quantum key distribution. Two special cases of this are deduced, i.e., one-vacuum-and-one-weak-decoy-state one-weak-decoy-state protocol. In these protocols, sender prepares actively, which avoids crude estimation parameters in SARG04 method. With detection events Bob's side that non-triggered...

Cabled underwater information networks (CUINs) have evolved over the last decade to provide abundant power and broad bandwidth communication enable marine science. To ensure reliable operation of CUINs, it is essential technology for high-impedance fault diagnosis isolation with high reliability accuracy. The short-circuit grounding status mesh topology constant current remote supply system was diagnosed by analyzing variation difference equivalent in Laplace transform domain. Shore feeding...

The indoor accelerated corrosion of 09CuPCrNi weathering steel in simulated industrial atmosphere was investigated by the weight-loss method, field emission scanning electron microscopy (FE-SEM), x-ray diffraction (XRD), and Raman spectroscopy. results indicated that kinetics could be divided into two stages with different log (thickness loss, D)-log (time, t) fitting functions. second stage corresponded to protective rust layer formed. Three correlation models involving atmospheric were...

A nonorthogonal passive decoy-state method is presented with a reconstructive weak coherent state source. The dose not prepare decoy states actively and divides the receiver detection events into two groups, i.e., triggered components nontriggered components, according to triggering situation of sender detector. Both as signal states, are used do some estimations generate secure key. simulation results show that better key generation rate longer transmission distance can be obtained than...

In order to study the mechanical behavior of bolted beam‐column connections, accuracy and applicability finite element model were firstly validated according published experiments on end‐plate connections using ABAQUS. Then, in discuss three semirigid which are convenient for prefabricated construction, including top‐and‐seat angle with web ear plate, extended connection, T‐stub examined numerical simulation analysis compare their capacity, hysteretic behavior, ductility, degradation...

The underwater electric energy conversion modules are the equipment for distributing to instruments in cabled information networks (CUINs), which also related normal and stable operation of systems, foundation an important part network platform. Based on classic push-pull high frequency switching circuit constant voltage conversion, isolated constant-current constant-voltage (CC–CV) converter based pulse width modulation (PWM) feedback was proposed this paper. Through theoretical analysis...

从有效性、稳定性和可行性三个方面, 对基于标记配对相干态光源的诱骗态量子密钥分配的性能进行了全面分析. 采用四组实验数据对基于标记配对相干态光源的三强度诱骗态方案的密钥生成效率、量子比特误码率和最优信号态强度与安全传输距离之间的关系进行了仿真和分析; 考虑到光源涨落, 对方案的稳定性进行了讨论和仿真; 并对基于标记配对相干态光源设计简单易实现方案的可行性进行了分析. 结论表明: 基于标记配对相干态光源的诱骗态方案性能在安全传输距离和密钥生成效率两方面都优于现有基于弱相干态光源和预报单光子源的诱骗态方案; 在光源强度涨落相同条件下, 标记配对相干态光源的稳定性逊于预报单光子源, 而优于相干态光源. 但是标记配对相干态光源在有效性上的优势可弥补其在稳定性上的不足; 且标记配对相干态光源的双模特性为设计简单易实现的被动诱骗态方案提供了条件.

The prefabricated semi-rigid concentrically braced steel frame has always been the main form of residential structures, much work so far focused on earthquake-resistance performance such structures. However, little attention devoted to systematic model testing, further effort is still required explore structural with experimental studies. Two frames were designed and tested failure under reversed low-cyclic loading. hysteretic curves, bearing capacity, energy dissipation ductility stiffness...

Decoy states have recently been proposed as a useful method for substantially improving the performance of quantum key distribution (QKD). Considering Scarani-Acin-Ribordy-Gisin protocol (SARG04) with heralded single photon source (HSPS), we review general model HSPS QKD system threshold detector, and analyze SARG04 non-decoy-state protocol, infinite active decoy-state combining decoy state passive method. Furthermore, discuss choice optimal signal intensity without obtain condition that...