Cultural Vacancy in Chinese-English Translation and Its Compensation Strategies

Attempts are made to explore the relationship between culture and translation, reasons are illustrated for the phenomenonof cultural vacancy and compensation methods for cultural vacancy are demonstrated in Chinese-English translation. Such strate-gies as literal translation, liberal translation, transliteration, annotation and cultural omission are of great guidance to our transla-tion practice.

Research on Anti-Fluctuation Control of Winding Tension System Based on Feedforward Compensation

In the fiber winding process,strong disturbance,uncertainty,strong coupling,and fiber friction complicate the winding constant tension control.In order to effectively reduce the influence of these problems on the tension output,this paper proposed a tension fluctuation rejection strategy based on feedforward compensation.In addition to the bias harmonic curve of the unknown state,the tension fluctuation also contains the influence of bounded noise.A tension fluctuation observer(TFO)is designed to cancel the uncertain periodic signal,in which the frequency generator is used to estimate the critical parameter information.Then,the fluctuation signal is reconstructed by a third-order auxiliary filter.The estimated signal feedforward compensates for the actual tension fluctuation.Furthermore,a time-varying parameters fractional-order PID controller(TPFOPID)is realized to attenuate the bounded noise in the fluctuation.Finally,TPFOPID is enhanced by TFO and applied to control a tension control system considering multi-source disturbances.The stability of the method is analyzed by using the Lyapunov theorem.Finally,numerical simulations verify that the proposed scheme improves the tracking ability and robustness of the system in response to tension fluctuations.

Dynamic mitigation strategy for stock-out based on joint compensation and procurement

Combining compensating customers and emergency sourcing,a type of dynamic mitigation strategy is proposed to deal with supply disruptions.When a stock-out occurs,the retailer can control backorders by the compensation level,and meet demand through an emergency source along with a high price.The unsatisfied customers decide to backorder or quit orders depending on the compensation level,the waiting time,and the customers’patience.By dynamically capturing customers’post-disruption reactions,an optimal control model is formulated to minimize the cost incurred by the supply disruption.Solving the model,the optimal reactive strategy is proposed in six patterns:a pure sourcing,a pure compensation,a mixed policy,a mixed policy-pure sourcing,a mixed policy-pure compensation,and a pure compensation-mixed policy,mainly depending on the compensation cost,the disruption length,and the customers’patience.The strategies analytically indicate how to properly change the compensation level and sourcing quantity as the disruption continues.The conditions for effectively using each strategy are provided as well.

Compensation/consumption hierarchical control strategy based on wind-solar-hydrogen coupling grid connection

In the process of grid-connected wind and solar power generation,there are problems of high rate of abandoning wind and light and insufficient energy.In order to solve these problems,we construct a grid-connected wind-solar hydrogen storage(alkaline electrolyzer(AE)-hydrogen storage tank-battery-proton exchange membrane fuel cell(PEMFC))coupled system architecture.A grid-connected compensation/consumption hierarchical control strategy based on wind-solar hydrogen coupling is proposed.During the grid-connected process of wind and solar power generation,the upper-level control allocates power reasonably to the hydrogen energy storage system by dispatching the power of wind and solar power generation.At the same time,the control strategy ensures that the pressure of the hydrogen storage tank is within the safety range limit,and the lower control completes the control of the duty cycle of the converter in the system.Due to the randomness of wind and light,the hydrogen energy storage system is divided into three working conditions,namely compensation,balance and consumption,and five working modes.The simulation results show that the hydrogen energy storage system compensates for 40%of the power shortage,and consumes 27.5%of the abandoned wind and solar energy,which improves the utilization rate of clean energy.

The Full Load Voltage Compensation Strategy in Capacity Configuration of UPQC Integrated PV-BESS

Unified power quality conditioner(UPQC)with energy storage is commonly based on conventional capacity configuration strategy with power angle control.It has problems such as phase jumping before and after compensation.DC-link cannot continuously emit active power externally.Therefore,this paper presents the compensation strategy of full load voltage magnitude and phase in capacity configuration of UPQC.The topology of UPQC is integrated a series active power filter(SAPF),a shunt active power filter(PAPF)and a photovoltaic-battery energy storage system(PV-BESS).The principle of full load voltage compensation is analyzed based on the PV-BESS-UPQC topology.Themagnitude constant of load voltage ismaintained by controlling the appropriate shunt compensation current.Then the UPQC capacity configuration is carried out using the full load voltage compensation strategy.The compensation capacity of UPQC series and shunt units are reduced.Finally,the simulation results show that the proposed compensation strategy reduces the capacity configuration by 5.11 kVA(36.4%)compared to the conventional compensation strategy.The proposed strategy can achieve full compensation of the load voltage,which can effectively reduce the capacity allocation and improve the economy of UPQC.It also has the PV-BESS units’ability of providing active power and can stabilize the DC-link voltage.

Study of Native Culture Aphasia and Compensation Strategies in English Education

English teaching in China has attached too much importance to the input of the target language culture,while neglecting our native culture.As a result,students cannot express Chinese culture in English,completely separating Chinese culture from English learning,leading to the serious native culture aphasia.This paper not only analyzes the reasons for this phenomenon from the aspects of curriculum setting,learning motivation,and teachers’quality,but also explains the necessity of integrating Chinese native culture in English teaching.On this basis,effective solutions are put forward from the perspective of classroom teaching,textbook compilation,curriculum arrangement,and so on.

Untranslatability and its Compensation Strategies——Taking The Original of Laura as an Example

As is known to all in the translation field,the problem of translatability and untranslatability has been a long-debated is sue in the field of translation.And the phenomenon of untranslatability is especially prominent in translation of literary works.This paper tries to discuss,from theory and practice,the phenomenon of untranslatability and its compensation strategies in trans lation between Chinese and English.It is roughly divided into two parts,wherein the first part deals with the phenomenon of un translatability,explaining its causes and giving some examples,and the second part deals with the compensation strategies,intro ducing several methods of compensation and taking The Original of Laura written by the deceased Russian-American writer Nabokov as an example.With the development of intercultural communication in the world and the great efforts of translators,the untranslatable words today can be translatable tomorrow.

Fuzzy Controller Based 3Phase 4Wire Shunt Active Filter for Mitigation of Current Harmonics with Combined p-q and Id-Iq Control Strategies

As more and more variable frequency drives (VFDs), electronic ballasts, battery chargers, and static Var compensators are installed in facilities, the problems related to harmonics are expected to get worse. As a result Active power filter (APF) gains much more attention due to excellent harmonic compensation. But still the performance of the active filter seems to be in contradictions with different control strategies. This paper presents detailed analysis to compare and elevate the performance of two control strategies for ex-tracting reference currents of shunt active filters under balanced, un-balanced and non-sinusoidal conditions by using Fuzzy controller. The well known methods, instantaneous real active and reactive power method (p-q) and active and reactive current method (id-iq) are two control methods which are extensively used in active filters. Extensive Simulations are carried out with fuzzy controller for both p-q and Id-Iq methods for different voltage conditions and adequate results were presented. Simulation results validate the superior per-formance of active and reactive current control strategy (id-iq) with fuzzy controller over active and reactive power control strategy (p-q) with fuzzy controller.

Instantaneous Active and Reactive Power and Current Strategies for Current harmonics cancellation in 3-ph 4wire SHAF With both PI and Fuzzy Controllers

Control strategies for extracting the three-phase reference currents for shunt active power filters are compared, evaluating their performance under different source conditions with PI and Fuzzy Controllers in MATLAB/Simulink environment When the supply voltages are balanced and sinusoidal, the two control strategies are converge to the same compensation characteristics;However, the supply voltages are distorted and/or un-balanced sinusoidal, these control strategies result in different degrees of compensation in harmonics. The compensation capabilities are not equivalent, with p - q control strategy unable to yield an adequate solution when source voltages are not ideal. Extensive simulations are carried out with PI controller and also with Fuzzy controller for both p-q and Id-Iq control strategies under different main voltages. Extensive Simulations are carried out with PI as well as fuzzy controller for both p-q and Id - Iq control strategies by considering different voltage conditions and adequate results were presented. On owing Id - Iq method with fuzzy logic controller gives away an out-standing performance under any voltage conditions (balanced, un-balanced, balanced and non-sinusoidal).

i_d-i_qControl Strategy for Mitigation of Current Harmonics with Fuzzy Logic Controller Using Matlab/Simulation and RTDS Hardware

The main objective of this paper is to develop Fuzzy controller to analyse the performance of instantaneous real active and reactive current (id-iq) control strategy for extracting reference currents of shunt active filters under balanced, un-balanced and balanced non-sinusoidal conditions. When the supply voltages are balanced and sinusoidal, the all control strategies are converge to the same compensation characteristics;However, the supply voltages are distorted and/or un-balanced sinusoidal, these control strategies result in different degrees of compensation in harmonics. The p-q control strategy unable to yield an adequate solution when source voltages are not ideal. Extensive simulations are carried out with Fuzzy controller for id-iq control strategy under different main voltages. The 3-ph 4-wire shunt active filter (SHAF) system is also implemented on a Real Time Digital Simulator (RTDS Hardware) to further verify its effectiveness. The detailed simulation and RTDS Hardware results are included.

Research on Multi Level Dynamic Voltage Compensator based on MMC

The modular multilevel converter （MMC） is a highly modular, easy to expand; the output voltage waveform is good, especially suitable for application in high voltage power system. This article first introduces the circuit topology and principle of MMC, and the main technical characteristics of MMC. And according to the relationship between the drop power voltage and the load power factor, proposed three working modes of the minimum energy compensation strategy. It is shown that MMC has good application prospect in future medium or high- voltage high power applications, especially be one of candidates for HVDC system application.

风电集群汇集的共享储能虚拟惯量补偿控制策略

针对大规模风电并网导致系统惯量削弱问题,提出风电集群汇集的共享储能虚拟惯量补偿控制策略。首先,计算风电集群惯量削弱量及共享储能电站的惯量补偿目标;然后,根据惯性响应的基本物理意义,定义储能装置的虚拟惯量;接着,探明其时变特性,求解储能虚拟惯量时域过程,确定储能电站以及各储能单元虚拟惯量补偿目标,提出各储能单元补偿目标动态设置控制参数的控制策略;最后,通过Matlab/Simulink仿真,验证了所提策略在不同储能配置容量、不同风电渗透率下均具有良好控制效果和适应性。

光学陀螺旋转调制惯导系统及关键技术发展

面向长航时、高精度的自主导航技术需求,系统梳理光学陀螺旋转调制惯导系统的发展历程及关键技术现状具有重要的现实意义。首先,基于惯导系统误差特性,阐述了旋转调制技术的基本原理。其次,系统回顾和梳理欧美等西方国家旋转惯导系统发展历程,分析了系统发展演变后的技术逻辑,总结了我国旋转惯导系统的研制现状。最后,立足于提高系统自主导航精度,从旋转策略优化、误差标校、初始对准3个方面分析了旋转惯导系统需解决的关键技术及研究现状。在总结光学陀螺旋转调制惯导系统及关键技术发展基础上,针对后续旋转惯导系统研究提出了几点思考,为高精度自主导航技术研究提供参考。

整体叶盘叶片加工补偿策略及实验研究

目的降低航天发动机整体叶盘的加工误差,实现产品高精度化。方法建立整体叶盘叶片加工变形量全局分布有限元模型,考虑补偿加工时刀具修正量与变形误差的耦合效应,采用多次迭代法计算叶片变形补偿量;提出反向重构几何模型补偿策略,利用补偿量对叶片几何轮廓进行重构,重新生成包含叶片变形误差信息的刀轨程序。通过某型号航空发动机整体叶盘叶片铣削加工实验和型面精度测量实验,对变形分布预测模型及所提出的反向重构模型补偿策略进行验证。结果预测结果与实验结果有很好的吻合度,平均误差为7.96%;新的补偿策略数据嵌入方式高效,可显著降低加工过程中产生的变形误差,将成品精度控制在设计的许用公差范围以内。结论所提方法可以明显提高整体叶盘叶片铣削加工质量,可为后续磨削加工提供更高型面精度的叶片零件。

考虑主变电所资源共享的城市轨道交通供电系统无功补偿方案

[目的]当城市轨道交通供电系统的主变电所资源共享时,能够节省供电系统的投资成本。在此背景下,为使PCC(公共连接点)的功率因数达到标准,需要对不同阶段的主变电所资源共享无功补偿方案进行研究。[方法]以某城市地铁线路的供电系统为例,根据行车计划和供电系统结构,推算出PCC处在全日功率因数达标的情况下,主变电所资源共享前后的最小无功功率补偿量。提出考虑主变电所资源共享的无功补偿设置方案,以主变电所资源共享前后的最小无功功率补偿量满足补偿需求为基础,以SVG(静止无功发生器)容量最小为目标,确定SVG和电抗器或电容器的安装容量。[结果及结论]在案例线路的供电系统中,1#主变电所主变压器供电分区无功补偿装置的实际配置为:电抗器容量为6.0 Mvar;SVG容量为1.0 Mvar;2#主变压器供电分区无功补偿装置的配置为:电抗器容量为3.0 Mvar;SVG容量为0.5 Mvar。所提供电系统无功补偿方案将总计容量为9.0 Mvar的SVG装置替换成电抗器,在满足无功补偿需求的同时降低了投资成本。

考虑服务供应能力和服务质量的众包物流服务定价策略

通过考虑订单需求量与服务供应能力的关系,分别构建基于服务供应能力以及基于服务供应能力和服务质量的众包物流服务定价模型,提出最优的服务价格与服务质量决策;在此基础上,比较不同定价模式的最优决策和企业利润,并分析众包配送员报酬率对最优决策和企业利润的影响。研究发现,众包物流企业在基于服务供应能力和服务质量的定价模型中能获得更高的利润;此外,不同条件下服务价格与报酬率成反比或随着报酬率的增加先上升再下降,而服务质量和众包物流企业利润都随着报酬率的增加先上升后下降。

森林保险实施情况、发展困境与优化策略——以河南省为例

我国自2009年起实施森林保险中央财政保费补贴试点政策,森林保险参保面积和保费规模不断扩大,河南省自2012年起开始实施森林保险试点工作。以河南省为例,总结森林保险发展情况和目前的发展困境。研究发现:自试点以来,河南省森林保险覆盖率稳步上升,但公益林保险与商品林保险发展相对不均衡,商品林保险参保面积和参保率长期处于较低水平,现行森林保险产品难以满足实际风险管理需要,森林保险整体赔付率较低,保险风险补偿功能和产品创新能力亟待提升。因此,从优化森林保险运行机制、创新保险产品、改进保险定价方式、提高保险服务质量等方面提出对策建议,为河南省及全国森林保险高质量发展提供参考。

不同温度下的基于BPNN-AUKF的新型自动水下航行器SOC估计器

本研究提出了一种基于反向传播神经网络(BPNN)和自适应无迹卡尔曼滤波器(AUKF)的SOC(state of charge)估计方法。首先针对电池SOC与端电压之间在不同温度下的关系,研究设计了一系列温度补偿策略,以提高在低温、低SOC条件下的估计精度。其次,利用反向传播神经网络(BPNN)建立了一个耦合了温度补偿策略的电池模型。这个模型能更好地适应低温和低SOC条件下的电池状态变化,提高了SOC估计的准确性。最后,基于BPNN电池模型建立了BPNN-AUKF的SOC估计框架,通过利用测量值与测量预测值之间的信息和残差序列,对系统过程和测量噪声协方差进行估计修正。通过实验验证,发现该方法在低温环境下具有明显优势,相比传统方法能够更准确地估计电池的SOC,且具备较好的泛化能力。这种基于BPNN-AUKF方法的SOC估计器不仅适用于自主无人潜水器(AUV),而且对于其他在复杂环境中工作的车辆也具有广泛的应用价值。

一种拓展模块化多电平变换器的光伏系统稳定运行范围的谐波补偿调制策略

由于阴影遮挡、损坏等问题,基于模块化多电平变换器的光伏系统中存在光伏(PV)输出功率不平衡的现象,会使高输出功率PV对应的子模块过调制。谐波补偿调制策略是解决该问题的一种常见方案,通过向高功率PV的子模块中注入谐波而避免子模块过调制,低功率PV的子模块(称为正常子模块)则需要补偿数量相同、相位相反的谐波,使桥臂内的谐波相抵消而不会造成桥臂电压和电流畸变。然而,在PV功率严重不平衡时,为了避免高功率PV的子模块过调制,现有谐波补偿调制策略需要注入的谐波过大,会超过正常子模块的补偿范围,使正常子模块出现过调制,导致桥臂电压和电流畸变,影响系统的稳定运行。该文提出一种新型谐波补偿调制策略,在高功率PV的子模块不发生过调制的前提下避免正常子模块过调制,保证系统的稳定运行。同时,该文对不同谐波补偿调制策略稳定运行范围进行了定性和定量评估,表明所提谐波补偿调制策略能在更多PV功率不平衡工况下稳定运行。通过仿真与实验验证谐波补偿调制策略在模块化多电平变换器光伏系统中的可行性与理论分析的正确性。

Fault Ride Through Strategy of DFIG Using Rotor Voltage Direct Compensation Control Under Voltage Phase Angle Jump

Wind power has developed rapidly in recent years,and large-scale wind power facilities connected to power grids will bring many new challenges.Some new operation charac-teristics of power grids with doubly-fed induction generator(DFIG)may exhibit,for example voltage phase angle jumps(VPAJ).VPAJ can negatively impact the fault ride through(FRT)performance of DFIG.This paper firstly investigates the physical mechanism and the operation characteristics of DFIG with VPAJ.It is noted that the current control strategies designed for voltage amplitude changes are not suitable for VPAJ.Secondly,the paper develops an FRT optimization control strategy under VPAJ which optimizes the DFIG operation characteristics.Finally,simulations of a 250 MW wind farm are presented which validate the proposed FRT strategy.