Nonreciprocal Photon Blockade Based on Zeeman Splittings Induced by a Fictitious Magnetic Field

Quantum nonreciprocity, such as nonreciprocal photon blockade, has attracted a great deal of attention due to its unique applications in quantum information processing. Its implementation primarily relies on rotating nonlinear systems, based on the Sagnac effect. Here, we propose an all-optical approach to achieve nonreciprocal photon blockade in an on-chip microring resonator coupled to a V-type Rb atom, which arises from the Zeeman splittings of the atomic hyperfine sublevels induced by the fictitious magnetic field of a circularly polarized control laser. The system manifests single-photon blockade or multi-photon tunneling when driven from opposite directions. This nonreciprocity results from the directional detunings between the countercirculating probe fields and the V-type atom, which does not require the mechanical rotation and facilitates integration. Our work opens up a new route to achieve on-chip integrable quantum nonreciprocity, enabling applications in chiral quantum technologies.

Magnetic Nonreciprocity in a Hybrid Device of Asymmetric Artificial Spin-Ice-Superconductors

Controlling the size and distribution of potential barriers within a medium of interacting particles can unveil unique collective behaviors and innovative functionalities.We introduce a unique superconducting hybrid device using a novel artificial spin ice structure composed of asymmetric nanomagnets.This structure forms a distinctive superconducting pinning potential that steers unconventional motion of superconducting vortices,thereby inducing a magnetic nonreciprocal effect,in contrast to the electric nonreciprocal effect commonly observed in superconducting diodes.Furthermore,the polarity of the magnetic nonreciprocity is in situ reversible through the tunable magnetic patterns of artificial spin ice.Our findings demonstrate that artificial spin ice not only precisely modulates superconducting characteristics but also opens the door to novel functionalities,offering a groundbreaking paradigm for superconducting electronics.

Reciprocity Relation between Alternative Gravity Formulas

We compare Newton’s force law of universal gravitation with a corrected simple approach based on Bhandari’s recently presented work, where the gravitation constant G is maintained. A reciprocity relation exists between both alternative gravity formulas with respect to the distances between mass centers. We conclude a one-to-one mapping of the two gravitational formulas. We don’t need Einstein’s construct of spacetime bending by matter.

Reciproc单支锉清除iRoot SP糊剂单尖法根管充填材料的再治疗效率研究

目的以AH糊剂冷侧压法、热牙胶垂直加压法为对照,口腔锥形束CT(CBCT)三维重建评价使用Reciproc单支锉去除iRoot SP糊剂单尖法术后根管充填材料的再治疗效率。方法选择福建医科大学附属福州市第一医院口腔科2021年7—11月正畸拔除的卵圆形单根管下颌前磨牙90个,采用随机数表法分为iRoot SP糊剂单尖法组(1组)、热牙胶垂直加压组(2组)和AH糊剂冷侧压组(3组)。使用Reciproc单支锉再治疗,终末超声荡洗2 min。分别于根充术后、再治疗、超声荡洗后CBCT扫描并三维重建,记录再治疗时间、根管残余充填材料体积。结果1组再治疗耗时最长,2组最短,差异有统计学意义(P<0.05)。1组残余充填材料最多,大于2组,差异有统计学意义(P<0.05),大于3组,但差异无统计学意义(P>0.05)。超声荡洗后,1组残余量大幅度减少,差异有统计学意义(P<0.05);最终残余量大于2组,差异有统计学意义(P<0.05),大于3组,但差异无统计学意义(P>0.05)。结论无论哪种充填方法,Reciproc单支锉再治疗均不能完全去除充填材料。iRoot SP糊剂单尖法进行再治疗耗时最多,残余量也最多,超声荡洗能够显著减少残余量。

Relaxed Stability Criteria for Delayed Generalized Neural Networks via a Novel Reciprocally Convex Combination

Dear Editor,This letter examines the stability issue of generalized neural networks(GNNs) with time-varying delay based on a novel reciprocally convex combination(RCC). By considering a new matrix polynomial, the proposed novel reciprocally convex method leads to a tight bound for integral inequality combination and encompasses several existing approaches as special cases.

Genome-wide recombination variation in biparental segregating and reciprocal backcross populations provides information for introgression breeding in Brassica napus

Variation in patterns of recombination in plant genomes provides information about species evolution,genetic diversity and crop improvement. We investigated meiotic crossovers generated in biparental segregating and reciprocal backcross populations of the allopolyploid genome of rapeseed(Brassica napus)(AACC, 2n = 38). A structured set of 1445 intercrossed lines was derived from two homozygous de novo genome-assembled parents that represented the major genetic clusters of semi-winter Chinese and winter European rapeseeds, and was used to increase QTL resolution and achieve genomic reciprocal introgression. A high-density genetic map constructed with 6161 genetic bins and anchored centromere regions was used to establish the pattern of recombination variation in each chromosome. Around 93%of the genome contained crossovers at a mean rate of 3.8 c M Mb^(-1), with the remaining 7% attributed to centromeres or low marker density. Recombination hotspots predominated in the A genome, including two-thirds of those associated with breeding introgression from B. rapa. Genetic background might affect recombination variation. Introgression of genetic diversity from European winter to Chinese semi-winter rapeseed showed an increase in crossover rate under the semi-winter environment. Evidence for an elevated recombination rate having historically contributed to selective trait improvement includes accumulation of favorable alleles for seed oil content on hotspots of chromosome A10. Conversely, strong artificial selection may affect recombination rate variation, as appears to be the case with a coldspot resulting from strong selection for glucosinolate alleles on A09. But the cold region would be promptly reactivated by crossing design indicated by the pedigree analysis. Knowledge of recombination hotspots and coldspots associated with QTL for 22 traits can guide selection strategies for introgression breeding between the two gene pools. These results and rich genomic resources broaden our understanding of recombination behavior in allopolyploids and may advance rapeseed genetic improvement.

Nonreciprocal Phonon Laser in an Asymmetric Cavity with an Atomic Ensemble

Phonon lasers,as a novel kind of lasers for generating coherent sound oscillation,has attracted extensive attention.Here,we theoretically propose a nonreciprocal phonon laser in a hybrid optomechanical system,which is composed of an asymmetric Fabry-Pérot cavity,an ensemble of N identical two-level atoms,and a mechanical oscillator.The effective driving amplitude related to driving direction leads to an obvious difference in mechanical gain and threshold power,bringing about a nonreciprocal phonon laser.In addition,the dependence of the phonon laser on the atomic parameters is also discussed,including the decay rate of the atoms and the coupling strength between the atoms and the cavity field,which provides an additional degree of freedom to control the phonon laser action.Our work provides a path to realizing a phonon laser in an atoms-cavity optomechanical system and may aid the manufacture of directional coherent phonon sources.

Unconventional Nonreciprocal Voltage Transition in Ag_(2)Te Nanobelts

Nonreciprocal effects are consistently observed in noncentrosymmetric materials due to the intrinsic symmetry breaking and in high-conductivity systems due to the extrinsic thermoelectric effect. Meanwhile, nonreciprocal charge transport is widely utilized as an effective experimental technique for detecting intrinsic unidirectional electrical contributions. Here, we show an unconventional nonreciprocal voltage transition in topological insulator Ag_(2)Te nanobelts. The nonreciprocal voltage develops from nearly zero to giant values under the applied current I_(ac) and external magnetic fields, while remaining unchanged under various current I_(dc). This unidirectional electrical contribution is further evidenced by the differential resistance(dV/dI) measurements. Furthermore, the transition possesses two-dimensional properties under a tilted magnetic field and occurs when the voltage between two electrodes exceeds a certain value. We propose a possible mechanism based on the development of edge channels in Ag_(2)Te nanobelts to interpret the phenomenon. Our results not only introduce a peculiar nonreciprocal voltage transition in topological materials but also enrich the understanding of the intrinsic mechanism that strongly affects nonreciprocal charge transport.

Construction and Application of Cloud Computing Model for Reciprocal and Collaborative Knowledge Management

Promoting the co-constructing and sharing of organizational knowledge and improving organizational performance have always been the core research subject of knowledge management.Existing research focuses on the construction of knowledge management systems and knowledge sharing and transfer mechanisms.With the rapid development and application of cloud computing and big data technology,knowledge management is faced with many problems,such as how to combine with the new generation of information technology,how to achieve integration with organizational business processes,and so on.To solve such problems,this paper proposes a reciprocal collaborative knowledge management model(RCKMmodel)based on cloud computing technology,reciprocity theory,and collaboration technology.RCKM model includes project group management and cloud computing technology,which can realize management,finance,communication,and quality assurance of multiple projects and solve the problem of business integration with knowledge management.This paper designs evaluation methods of tacit knowledge and reciprocity preference based on the Bayesian formula and analyzes their effect with simulation data.The methods can provide quantitative support for the integration of knowledge management and business management to realize reciprocity and collaboration in the RCKM model.The research found that RCKM model can fully use cloud computing technology to promote the integration of knowledge management and organizational business,and the evaluation method based on the Bayesian formula can provide relatively accurate data support for the evaluation and selection of project team members.

An Automatic Threshold Selection Using ALO for Healthcare Duplicate Record Detection with Reciprocal Neuro-Fuzzy Inference System

ESystems based on EHRs(Electronic health records)have been in use for many years and their amplified realizations have been felt recently.They still have been pioneering collections of massive volumes of health data.Duplicate detections involve discovering records referring to the same practical components,indicating tasks,which are generally dependent on several input parameters that experts yield.Record linkage specifies the issue of finding identical records across various data sources.The similarity existing between two records is characterized based on domain-based similarity functions over different features.De-duplication of one dataset or the linkage of multiple data sets has become a highly significant operation in the data processing stages of different data mining programmes.The objective is to match all the records associated with the same entity.Various measures have been in use for representing the quality and complexity about data linkage algorithms,and many other novel metrics have been introduced.An outline of the problem existing in themeasurement of data linkage and de-duplication quality and complexity is presented.This article focuses on the reprocessing of health data that is horizontally divided among data custodians,with the purpose of custodians giving similar features to sets of patients.The first step in this technique is about an automatic selection of training examples with superior quality from the compared record pairs and the second step involves training the reciprocal neuro-fuzzy inference system(RANFIS)classifier.Using the Optimal Threshold classifier,it is presumed that there is information about the original match status for all compared record pairs(i.e.,Ant Lion Optimization),and therefore an optimal threshold can be computed based on the respective RANFIS.Febrl,Clinical Decision(CD),and Cork Open Research Archive(CORA)data repository help analyze the proposed method with evaluated benchmarks with current techniques.

The Reciprocal and Symbiotic Effects of Industrial Relocation between China and BRI Countries

Reciprocity and symbiosis are essential to the creation of“a community with a shared future for mankind”,and industrial relocation is a key strategy for implementing the Belt and Road Initiative(BRI).This paper investigates the reciprocal and symbiotic effects of industrial relocation between China and BRI countries,and performs an empirical test using the Eora global supply chain database of 2002-2020.Our findings suggest that there has been an increasing level of industrial reciprocity and symbiosis between China and BRI countries,but great differences exist across sectors and regions;industrial relocation between China and BRI countries is conducive to two-way industrial reciprocity and symbiosis primarily through regional value chain cooperation and an increasing level of industrial agglomeration.The most substantial effects have been observed in industrial relocation involving developed BRI countries,in medium-and high-tech sectors,and following the announcement of the BRI.

Expanding Older Adults’ Care Choices Utilizing the Proceeds of Reciprocated Volunteerism: Capitalizing on Ghana’s Digitalization Artillery

Ghana has been a collectivistic society. However, due to social change, this value is fast being replaced by individualistic tendencies with implications for age-oriented care provision and receipt. This paper investigates the participation in the socially productive strategy of using ageing-oriented volunteerism to leverage the receipt of care in later life utilizing a quantitative dataset. The results show that volunteering may be undertaken with old age in sight. This needs to take place under circumstances of good communication skills among others. The accumulated time needs to be recorded in a time bank and redeemed with a time bank card in later life. Two-dimensional leveraging points pertain in this context: first, leveraging volunteerism for short or long-term care in the nearest future;second, technological innovation’s facilitation of the same. Volunteerism in this context has the attribute of low levels of depression, with implications for quality of life. These are discussed in the light of the social care pillar of ageing social policy. The paper argues that adopting volunteerism with reciprocation as the ultimate goal constitutes a kickback model for care receipt in later life. It served as a choice of care in later life which is a shock absorber to inadequate formal support infrastructure and individualistic social tendencies in Ghana. It is reminiscent of resistance to the shrinkage of older persons’ social integration in their social world.

Research on Feature Extraction Method for Low-Speed Reciprocating Bearings Based on Segmented Short Signal Modulation Signal Bispectrum Slicing

Bearing condition monitoring and fault diagnosis (CMFD) can investigate bearing faults in the early stages, preventing the subsequent impacts of machine bearing failures effectively. CMFD for low-speed, non-continuous operation bearings, such as yaw bearings and pitch bearings in wind turbines, and rotating support bearings in space launch towers, presents more challenges compared to continuous rolling bearings. Firstly, these bearings have very slow speeds, resulting in weak collected fault signals that are heavily masked by severe noise interference. Secondly, their limited rotational angles during operation lead to a restricted number of fault signals. Lastly, the interference from deceleration and direction-changing impact signals significantly affects fault impact signals. To address these challenges, this paper proposes a method for extracting fault features in low-speed reciprocating bearings based on short signal segmentation and modulation signal bispectrum (MSB) slicing. This method initially separates short signals corresponding to individual cycles from the vibration signals based on encoder signals. Subsequently, MSB analysis is performed on each short signal to generate MSB carrier-slice spectra. The optimal carrier frequency and its corresponding modulation signal slice spectrum are determined based on the carrier-slice spectra. Finally, the MSB modulation signal slice spectra of the short signal set are averaged to obtain the overall average feature of the sliced spectra.

Study on Public Health Behavior against the Background of COVID-19 Pandemic - Based on Bandura Reciprocal Determinism

Objective To explore the factors influencing public health behaviors in China in the context of COVID-19 pandemic,and to propose suggestions and countermeasures for enhancing public health behaviors.Methods A public health behavior system based on Bandura’s reciprocal determinism was constructed,and public health behavior was analyzed from the perspective of the interaction of health awareness,health behavior and environment.Results and Conclusion The public health behavior was analyzed through the public health behavior system based on Bandura’s reciprocal determinism,and the results and conclusions were draw.The public can be urged to develop better health beliefs and form better health behaviors by strengthening publicity and interventions,improving personal awareness,and increasing government investment.

Integration of GIS with the Generalized Reciprocal Method(GRM)for Determining Foundation Bearing Capacity:A Case Study in Opolo,Yenagoa Bayelsa State,Nigeria

This study addresses the pressing need to assess foundation bearing capacity in Opolo,Yenagoa,Bayelsa State,Nigeria.The significance lies in the dearth of comprehensive geotechnical data for construction planning in the region.Past research is limited and this study contributes valuable insights by integrating Geographic Information System(GIS)with the Generalized Reciprocal Method(GRM).To collect data,near-surface seismic refraction surveys were conducted along three designated lines,utilizing ABEM Terraloc Mark 6 equipment,Easy Refract,and ArcGIS 10.4.1 software.This methodology allowed for the determination of key geotechnical parameters essential for soil characterization at potential foundation sites.The results revealed three distinct geoseismic layers.The uppermost layer,within a depth of 0.89 to 1.50 meters,exhibited inadequate compressional and shear wave velocities and low values for oedometric modulus,shear modulus,N-value,ultimate bearing capacity,and allowable bearing capacity.This indicates the presence of unsuitable,soft,and weak alluvial deposits for substantial structural loads.In contrast,the second layer(1.52 to 3.84 m depth)displayed favorable geotechnical parameters,making it suitable for various construction loads.The third layer(15.00 to 26.05 m depth)exhibited varying characteristics.The GIS analysis highlighted the unsuitability of the uppermost layer for construction,while the second and third layers were found to be fairly competent and suitable for shallow footing and foundation design.In summary,this study highlights the importance of geotechnical surveys in Opolo’s construction planning.It offers vital information for informed choices,addresses issues in the initial layer,and suggests secure,sustainable construction options.

机用ProTaper和Reciproc对弯曲根管成形能力的对比研究

目的:比较机用Pro Taper(PT)和Reciproc(RE)两种镍钛根管预备系统对弯曲根管的成形能力。方法:选择20个离体下颌第一磨牙,随机分为2组(n=10),分别用PT和RE进行根管预备并记录预备时间;在根管预备前后分别进行Micro-CT扫描,并利用Fitme DICOM Viewer软件进行根管三维重建和分析,比较2种器械对弯曲根管的形能力。结果:三维重建图像显示,根管预备前后弯曲度的改变量PT组大于RE组(P<0.05);两组根管体积和表面积的改变量在根上部和根中部差异无统计学意义(P>0.05),而在根尖部PT组大于RE组(P<0.05);根管预备时间PT组长于RE组(P<0.05)。结论:单支锉根管预备系统Reciproc在预备效率及中心定位能力,尤其在根尖1/3部,优于机用Pro Taper。

TFA、Reciproc及ProTaper Next根管预备系统的清洁能力及根尖推出物量的比较

目的:评价3种新型镍钛根管预备系统TFA、Reciproc及ProTaper Next的根管清洁能力及根尖推出量的差异。方法:将40个人类单根管前磨牙随机分为4组(n=10),分别用K锉(A组)、TFA(B组)、Reciproc(C组)和ProTaper Next(D组)进行根管预备后,用扫描电镜(SEM)对各组根管壁表面的碎屑及玷污层进行评估。然后再将40个树脂根管模型随机分为4组(n=10),分别采用上述4种预备系统进行根管预备,在预备过程中收集其根尖推出物,分别称量,用Ahmad评估标准比较各组推出碎屑及冲洗液的量。结果:各组根管壁的碎屑及玷污层评分由高到低依次为:A组>D组>C组>B组(组间两两相比P<0.05);各组推出根尖的碎屑及冲洗液的量由高到低依次为:K锉组>Reciproc组>ProTaper Next组>TFA组(组间两两相比P<0.05)。结论:TFA、Reciproc及ProTaper Next 3种镍钛预备系统的根管清洁力均优于K锉,TFA效果最佳。

Reciproc单支锉预备磨牙弯曲根管疗效观察

目的：评价往复运动式Reciproc单支锉预备磨牙弯曲根管，保持原根管解剖走向的能力。方法选择年龄18～59岁牙髓病初诊病例，按 Schneider 测量法，第一磨牙弯曲根管（20°～30°）100例，200个根管（颊，舌弯曲根管），随机分为Reciproc组50例，100个根管，Protaper组50例，100个根管，进行根管预备。测量术前片、插针片、主尖片的根管弯曲度，比较根管偏移率，评价根管成形和根尖封闭效果。结果2组机用镍钛锉备根成功率：Reciproc组99％，Protaper组92％，有显著性差异（ P＜0．05）。结论 Reciproc的创新设计，使预备磨牙弯曲根管成形佳，反应轻，根尖封闭好，快捷高效，实现了一支锉代替一组锉。

Protaper next和Reciproc在一次法根管治疗术中的应用效果比较

目的:探讨比较Protaper next和Reciproc在一次法根管治疗术中的应用效果。方法:将我院2017年11月-2018年11月接收的90例行一次法根管治疗的病人随机均分为PTN组(采用Protaper next根管预备系统)与RP组(采用Reciproc根管预备系统),比较二组的根管预备时间、疼痛率及有效率。结果:PTN组每个根管的平均预备时间显著长于RP组(P<0.05);根管治疗1周后,PTN组的疼痛率显著低于RP组(P<0.05);二组治疗总有效率比较差异无统计学意义(P>0.05)。结论:Protaper next及Reciproc根管预备系统疗效相当,但Reciproc的根管预备用时较短,Protaper next的术后疼痛发生率较低。

Reciproc和Mtwo两种镍钛根管预备系统在下颌第一磨牙一次法根管治疗术中的应用对比

目的评价应用Reciproc和Mtwo两种镍钛根管预备系统在下颌第一磨牙一次法根管治疗术中的效果差异。方法选择2015年6月~2016年6月在我院行下颌第一磨牙一次法根管治疗术的72例患者,随机分为R组和M组,各组36例分别在基础治疗之上采用Reciproc和Mtwo两种镍钛根管预备系统进行根管预备后行根管填充,术后随访6个月,比较两组患者根管预备时间、根管预备并发症(如髓腔穿孔、台阶和器械折断)、根管填充情况和根管治疗约诊间痛(EIAP)以及术后6个月的疗效差异。结果 R组和M组的根管准备时间分别为(120.23±38.67)s和(72.82±36.22)s,R组的EIAP发生率和疼痛程度明显低于M组,差异有统计学意义(P<0.05)两组根管预备并发症发生率、根管恰填率、以及术后6个月的疗效均无统计学差异(P>0.05)。结论与Mtwo镍钛;根管预备系统相比,在下颌第一磨牙一次法根管治疗术中应用Reciproc镍钛根管预备系统的根管准备时间较短,患者疼痛反应较小,而临床疗效无统计学差异,值得推广。