A Thermo-Tunable Metamaterial as an Actively Controlled Broadband Absorber

Metamaterials have attracted increasing attention in recent years due to their powerful abilities in manipulating electromagnetic (EM) waves. However, most previously reported metamaterials are unable to actively control full-band EM waves. In this paper, we propose a thermo-tunable broadband metamaterial (T-TBM) using paraffin-based composites (PD-Cs) with different phase transition temperatures. Active control of the T-TBM reflection loss peaks from low to high frequency is realized by manipulating the solid–liquid state of the PD-Cs at different phase transition temperatures. The absorption peak bandwidth (where the reflection loss value is less than −30 dB) can be changed, while the broad bandwidth absorption (where the reflection loss value is less than −10 dB) is satisfied by adjusting the temperature of the T-TBM. It is shown that the stagnation of the phase transition temperature of the PD-Cs in the T-TBM provides a time window for actively controlling the EM wave absorption response under different thermal conditions. The device has a broad application prospect in the fields of EM absorption, intelligent metamaterials, multifunctional structural devices, and more.

Continuous-Wave and Actively Q-Switched Diode-Pumped Er:LuAG Ring Laser at 1650 nm

We demonstrate a cw and actively Q-switched Er：LuAO laser resonantly dual-end-pumped by 1532nm fibre- coupled laser diodes. A maximum cw output power of 1.9W at 1650.3nm is obtained at a pump power of 25.5 W, corresponding to a slope efficiency of 43.3 %. In the Q-switched regime, the maximum pulse energy of 3.51 mJ is reached at a pulse repetition rate of 100 Hz, a pulse duration of 90.5ns and a pump power of 25.5 W. At the repetition rate of 400 Hz, the output energy is 2.12m J, corresponding to a pulse duration of 125.4 ns.

An Actively Mode-Locked Ho:YAG Solid-Laser Pumped by a Tm-Doped Fiber Laser

An actively mode-locked Ho： YAG laser pumped by a diode-pumped Tin-doped fiber laser is reported. For the cw operation, we obtain the maximum output power of 3.43 W with a central wavelength 2022.2nm at the maximum incident pump power of 11.4 W, corresponding to a slope efficiency of 34.5%. The beam quality factor M2 is 1.16, and the output beam is close to fundamental TEMoo. In the case of the CWML operation, a stable pulse train is generated with an average output power up to 3.41 W with a slope efficiency of 34.3% at the incident pump power of 11.4 W and a pulse duration of 294ps at a repetition rate of 81.92MHz. In addition, the maximum single pulse energy is 41.6nJ.

CONSTRUCTION OF POLYNOMIAL MATRIX USING BLOCK COEFFICIENT MATRIX REPRESENTATION AUTO-REGRESSIVE MOVING AVERAGE MODEL FOR ACTIVELY CONTROLLED STRUCTURES

The polynomial matrix using the block coefficient matrix representation auto-regressive moving average(referred to as the PM-ARMA)model is constructed in this paper for actively controlled multi-degree-of-freedom(MDOF)structures with time-delay through equivalently transforming the preliminary state space realization into the new state space realization.The PM-ARMA model is a more general formulation with respect to the polynomial using the coefficient representation auto-regressive moving average(ARMA)model due to its capability to cope with actively controlled structures with any given structural degrees of freedom and any chosen number of sensors and actuators.(The sensors and actuators are required to maintain the identical number.)under any dimensional stationary stochastic excitation.

Application of ABCD Formalism in Theoretical and Experimental Analysis of Actively Modelocked Fiber Laser

Time domain ABCD matrix formalism is a useful model for analyzing the characteristics of actively modelocked fiber laser. Based on this model and given more consideration on the influences of optical fiber dispersion and optical fiber nonlinearity, the laser characteristic of actively modelocked fiber laser is analyzed, and the comparision of the theoretical analysis results with experimental ones is given.

A Mid-IR Optical Parametric Oscillator Pumped by an Actively Q-Switched Ho:YAG Ceramic Laser

We demonstrate a mid-IR ZnGeP2 （ZGP） optical parametric oscillator （OPO） pumped by a dual-end-pumped actively aeoasto-optie Q-switched Ho：YAG ceramic laser. The maximum average output power of 35 W is obtained at a pulse repetition frequency of 20 kHz from the Ho：YAG ceramic laser. Under the maximum incident pump power of Ho：YAG ceramic laser, the maximum output power of 14 W is obtained from the ZGP OPO, corresponding to the slope efficiency of 49.6% with respect to the incident pump power. The wavelength can be tuned from 3.5 μm to 4.2μm （signal）, corresponding to 5.24.1 μm （idler）. The beam quality M2 is less than 2.3 from the ZGP OPO.

Efficient Diode-End-Pumped Actively Q-Switched Nd:YLF/SrWO4 Raman Laser

An efficient diode-end-pumped actively Q-switched Nd：YLF/SrW04 Raman laser is demonstrated. The fun- damental wave is 1047.0nm and the corresponding first-Stocks wave is 1158.7nm. With a pumping power of 10.5 W, the average output power of 2.2 W at 1158.7nm is obtained, with the corresponding optical conversion efficiency of 20.9%. At a repetition rate of 6 kHz, the pulse width of the Raman laser is 8. 7ns and the peak power is calculated to be 42.1 kW. The beam quality factors M2 in horizontal and vertical directions are 1.3 and 1.5, respectively.

High-Power Dual-End-Pumped Actively Q-Switched Ho:YAG Ceramic Laser

We present a high-power Ho：YAG ceramic laser pumped at 1908nm. Using a dual-end-pumped structure, the maximum continuous-wave output power of 48 W is obtained, corresponding to a slope efficiency of 70.4% with respect to the absorbed pump power. At actively Q-switched mode, the maximum average output power of 46 W and the minimum pulse width of 21 ns are achieved at a pulse repetition frequency of 20 kHz, corresponding to a peak power of approximately 109.5kW. In addition, the beam-quality M2 factor is found to be 1.4 at the maximum output power.

Efficient Diode-Pumped Actively Q-Switched Ceramic Nd:YAG/YVO4 Raman Laser Operating at 1657 nm

A diode-pumped actively Q-switched Raman laser is demonstrated, with YV04 employed as Raman active medium, based on a ceramic Nd：YAG laser operating at 1444nm. The first-stokes Raman generation at 1657nm is achieved. A maximum output power of as high as 612mW is obtained under a pump power of 20. 7 W and at a pulse repetition frequency rate of 20kHz, corresponding to an optical-to-optical conversion efficiency of 3%.

Actively Circulating Volume as a Consequence of Stochasticity within Microcirculation

It is well established that in the pathology of the cardio-vascular system (CVS) only a portion of the blood volume (BV) can be in active circulation. This portion of BV is named the actively circulating volume (ACV) and is evaluated from a monotone decrease of dilution curve produced by an intravascular tracer. In given paper is presented Markov chain as a math model of the flow of a tracer throughout CVS. The consideration of CVS as a set of segments with respect to an anatomical structure and assuming the existence for CVS steady-state condition;leads to the Markov chain of the finite order with constant coefficients. The conclusions of the article are 1) there are open and closed microvessels, such that the switching from open to closed and back is a stochastic process, 2) if the switching is slow then the ACV, as the volume of heart chambers and only open for circulation vessels, can be detected.

Proactive Saudi Arabia:Actively Tackling the Regional Ever-changing Situation

There is chaos in the Gulf region. Saudi Arabia in conjunction with the United Arab Emirates, Bahrain, Egypt and other gulf countries,suddenly cut off diplomatic relations with Qatar expelling diplomats and citizens, exerting blockades on land, sea and aviation on June 5, 2017, with the excuse that Qatar supports terrorism- and damages regional security. Sandi Arabia and other gulf countries have issued an ultimatum on June 23, giving Qatar to 10 days to meet their 13 requirements. For a time, the Saudi-led group became the media hot word. The Gulf, once a rare peaceful land under the impact of the Arab Spring, now falls into chaos. The GCC in fact has split. This is another major diplomatic adventure that Saudi Arabia has taken in recent years.

China Actively Made Application to Hold 2010 World Fair

1. Application Procedure of 2010 World FairOn May 2, 2001, China, the first country, submitted formally an application for holding 2010 Shanghai World Fair to theBureau of International Exhibition (BIE). There were China, Russia, ROK, Poland, Mexico and Argentina (Afterwards ArgentinaWithdrew) formally submitting applications. The deadline for application is six months after the application was formally submittedby the first country. Then BIE sent investigation delegation to investigate various countries that made applications, and submittedreports to the Executive Commission and General Assembly. China stated reports at BIE 129th, 130th and 131st General Assembliesin June and November 2001 and July 2002 respectively. In December 2002, China stated the last report at BIE 132nd GeneralAssembly.

CAS Delegation Attended the Activities of IFAN Actively

On November 10-12,the 11^(th) IFAN International Conference of StandardsUsers and the 31^(st) IFAN Members' Assembly of the International Federation of Standards Users wereheld in the Renaissance Hotel of Amsterdam, the capital of Holland, and Mr. Neel Reeve, Presidentof IFAN, hosted the Conference and the Assembly. CAS (China Association for Standardization)delegation, consisting of Ms. Li Rui, President of CAS and the leader of the delegation, and twomembers, Zhang Wen and Xu Dajun attended the Conference and the Assembly.

Council Members of CAFIU Actively Participated in the Dialogue

Zhang Xuejun,member of the Standing Committee of CAFIU’s Executive Council and Directorgeneral of Jiangxi Provincial Foreign Affairs and Overseas Chinese Affairs Office,participated in the entire events of the Jiangxi Session of the Dialogue and presided over the Nanchang Dialogue.Jin Canrong,member of the Standing Committee of CAFIU’s Executive Council and Deputy Dean of the School of

Holding High the Great Banner of Deng Xiaoping Theory,Striving Hard to Promote Actively Foreign Trade and Economic Cooperation—Work Report at the Third Membership Congress of the CCPIT and CCOIC

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Actively Promoting Regional Space Cooperation——Vice Administrator, Loan Enjie headed a delegation to attend the Second Asia-Pacific Conference on Multilateral Cooperation in Space Technology and Applications

A Chinese delegation of 24 persons headed by Mr. Luan Enjie, Vice Administrator of China National Space Administration (CNSA) attended the Second Asia-Pacific Conference on Multilateral Cooperation in Space Technology and Applications held at Islamabad, the Capital of Pakistan from April 22 to 26, 1995. Following the First AsiaPacific Workshop held in Beijing in December, 1992, and the First Asia-Pacific Conference on Multilateral Cooperation in

To Actively Perform the Judicial Administration Function and Promote the Development of Cause of Human Rights

Respect for human rights and protection of human rights are significant rules in the Constitution of the People’s Republic of China.In 2015,judicial administration departments at all levels legally exercised their duties,implemented the principles and rules in constitution,and kept strengthening propagation of human rights through creation of contents and methods which had acquired great effects.What they have done contributes significantly toward the development of human rights in China.

NPC Deputies More Actively Involved in Politics

Putting forward bills and proposals is the right of people’s deputies endowed by law and the Constitution and one of the important ways for them to participate in the management of state affairs on behalf of the people. It is also one of the major channels to voice the popular feelings and wills. With the deepening of democracy and legal construction in recent years, people’s deputies have become more conscious of participating in state manage-

A modified approach to actively remove high viscosity silicone oil through 23-gauge cannula

AIM：To report a simple approach to actively remove high viscosity silicone oil through a 23-gauge cannula via pars plana.METHODS：Forty-eight eyes of 48 patients underwent silicone oil（5700 centistokes） removal（SOR） were enrolled.A section of blood transfusion set was prepared to connect a standard 23-gauge cannula and vitrectomy machine.Silicone oil was removed with suction of500-mm Hg vacuum through the cannula.Main outcome measures were SOR duration,number of sutured sites,intraocular pressure（IOP）,best-corrected visual acuity（BCVA）,and complications.RESULTS：Silicone oil was successfully removed in all cases.The mean SOR time was 5.70±0.85 min.Nine eyes（18.75%） needed suture partial sclerotomies.No intraoperative complications were noted.Transient hypotony（≤8 mm Hg） was seen in 3 eyes（6.25%） on postoperative day 1,but all resolved within 1wk.Retinal reattachment was achieved in all cases and no other postoperative complications were noted during 3-month following-up.BCVA at the final visit improved or stabilized in all patients comparing to the preoperative level.CONCLUSION：Active removal of high viscosity silicone oil through a 23-gauge instrument cannula jointed with blood transfusion set is a practical and reliable technique when considering two sides of efficacy and safety.

Symmetry properties of fluctuations in an actively driven rotor

We investigate rotational dynamics of an actively driven rotor through experiments and numerical simulations. While probability density distributions of rotor angular velocity are strongly non-Gaussian, relative probabilities of observing rotation in opposite directions are shown to be linearly related to the angular velocity magnitude. We construct a stochastic model to describe transitions between different states from rotor angular velocity data and use the stochastic model to show that symmetry properties in probability density distributions are related to the detailed fluctuation relation(FR) of entropy productions.