Sub-Recent Sexual Populations of Limnocythere inopinata Recorded for the First Time from>3500 m Altitude on the Tibetan Plateau

The central and northwestern Tibetan Plateau region,also called＂Qiangtang Plateau＂（30°27＇25＂-35°39＇13＂N,83o41＇14＂-95°10＇46＂E）,is the highest and largest arcticalpine area of the Earth covering approximately 600,000km^2 with altitude ranging from 4600 to 5100 m a.s.l.（Song et al.,2012,Fig.1）.

China National Standards on Nano-Materials Issued for the First Time

On February 28th, 2005, AQSIQ (the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China), and SAC (the Standardization Administration of P. R. China)jointly hosted the press conference on seven items of national standards on nano-materials in Beijing. The seven items of national standards were approved on Sept. 29th and Dec. 27th, 2004 respectively by SAC, and publicized in Jan. 2005. They will be formally put into practice from April 1st, 2005.

The First Time That I Had Lunch in School and I Washed My Clothes

Today,I had lunch from the cafeteria in my shool.It wasn't very expensive, and I spent four dollars on it.Actually,I didn't need to spend so much money.I bought two pizza-like things.They cost

THE DECAY DIAGRAMS OF TWO NEW NUCLIDES ESTABLISHED BY CHINA FOR THE FIRST TIME IN THE WORLD Lanzhou Institute of Modern Physics, CAS

The decay diagrams of radioactive nuclei are the obvious indication of the main properties shown by the nuclei at low states of excitement and of the basic aspects of nuclear physics.They are extensively applied in industry’,agriculture,energy,national defense,medical science,the environment,and metrology,as well as in astronomy,archaeology,geology,biology,chemistry and other basic sciences.Therefore,they are always focuses of interest.

彭佳慧的 “First time”

台湾新天后彭佳慧的实力倍受推崇,被称为“一位用生命挚诚吟唱音乐的灵魂”,最近她的第五张个人《Firsttime》经由上海音像公司引进发行。2000年5月20日,彭佳慧特地从台湾飞到北京。

Being a Mother for the First Time

ＢｅｉｎｇａＭｏｔｈｅｒｆｏｒｔｈｅＦｉｒｓｔＴｉｍｅＢｙＺＨＡＯＸＩＳＨＵＮＢＹＴＨＥｅｎｄｏｆｔｈｅ１９８０ｓｗｈｅｎｔｈｅｆｒｏｎｔｉｅｒｔｒａｄｅｂｅｔｗｅｅｎＣｈｉｎａａｎｄｔｈｅｆｏｒｍｅｒＳｏｖｉｅｄＵｎｉｏｎｗａｓｆｌｏｕｒｉｓｈｉｎ...

Foreign Scientists Join National Research Program for the First Time

Aproposal to carry out research into the chemistry of molecular agglomerate, jointly made by Tong Zhenhe with CAS Institute of Physical and Chemical Technologies, Jiang Xikui with Shanghai Institute of Organic Chemistry, Shen Jiaocong of Jilin University, and two German and

“Five-Year Plan” for State-Level Municipal Infrastructure Released for the First Time

The“13th Five-Year Plan”for the Construction of Municipal Infrastructures in Cities of China that was compiled by the Ministry of Housing and Urban-Rural Development and the National Development and Reform Commission was released for enforcement on May 26,2017.It is a first state-level and comprehensive plan for municipal infrastructures construction,which changes the conventional method of compiling different plans in different domains.As a systematic integration of

Diet Guidelines Stress Exercise for First Time

美国有一个每四年公布一次的dietary guidelines(食品指导),它被誉为gold standard of nutritional information。今年修正的dietary guidelines增加了新的exercise的内容,非常引人注目:The new guideliner recommend that bothadults and children get at least 30 minutes of physical activity daily in order tolower the risk of heart disease,colon(结肠)cancer and diabetes(糖尿病;多尿症).本文最幽默的一句话是:Although you don’t eat exercise,it’s the second half ofthe energy balance equation.(虽然你不吃“运动”,可是,运动却是能量收支平衡的另一部分。)此话非常形象地道出了运动的重要性。本文强调了所谓healthyliving,每日的饮食应该是:We should choose more whole-grain foods and a varietyof fruits and vegetables every day.美国总统克林顿亲自公布了这个新的食品指导,报道还顺便透露了总统本人的一些“隐私”,读来让人颇生联想: 1/…who(指克林顿)has a well-documented(被证明了的)appetite for not-very-healthy food. 2/Clinton,a regular jogger(慢跑者)until a knee injury in 1997.本文的另一个重要信息是:少吃糖！…the final version calls for Americans to

Isolation and identification of Brucella abortus from patients in Guizhou Province for the first time

Objective To etiologically diagnose and analyze two suspected patients of brucellosis and provide a etiologic basis for confirmation of the patients and control of brucellosis in Guizhou Province.Methods Antibody levels of Brucella in the suspected patients were determined by agar plate agglutination test and tube agglutination test.

The First Time the Right Was Gained

ONE of the fundamental distinctionsof a modern society from atraditional one is that in a modernsociety every citizen enjoys his/her rightslaid down by law.Traditionally,womenwere expelled from society’s mainstream.influenced as it was by the dominatingConfucian ideology,one philosophy

Exact scaling for the mean first-passage time of random walks on a generalized Koch network with a trap

In this paper, we study the scaling for the mean first-passage time （MFPT） of the random walks on a generalized Koch network with a trap. Through the network construction, where the initial state is transformed from a triangle to a polygon, we obtain the exact scaling for the MFPT. We show that the MFPT grows linearly with the number of nodes and the dimensions of the polygon in the large limit of the network order. In addition, we determine the exponents of scaling efficiency characterizing the random walks. Our results are the generalizations of those derived for the Koch network, which shed light on the analysis of random walks over various fractal networks.

Mean first-passage time of an asymmetric bistable system driven by colour-correlated noise

In this paper, the effect of every parameter （including p, q, r, λ, τ） on the mean first-passage time （MFPT） is investigated in an asymmetric bistable system driven by colour-correlated noise. The expression of MFPT has been obtained by applying the steepest-descent approximation. Numerical results show that （1） the intensity of multiplicative noise p and the intensity of additive noise q play different roles in the MFPT of the system, （2） suppression appears on the curve of the MFPT with small λ （e.g. λ 〈 0.5） but there is a peak on the curve of the MFPT when λ is big （e.g. λ 〉 0.5）, and （3） with different values of r （e.g. r = 0.1, 0.5, 1.5）, the effort of τ on the MFPT is diverse.

One-time fertilization at first flowering improves lint yield and dry matter partitioning in late planted short-season cotton

Cotton producers have substantially reduced their inputs(labor,nutrients,and management)mainly by adopting a shortseason cropping management that is characterized by late sowing,high density,and reduced fertilization with one-time application at the first bloom stage without lint yield reduction.However,it has been hypothesized that one-time fertilization at an earlier growth stage could be a more effective and economic management practice.A two-year field experiment was conducted by applying five fertilizer one-time fertilization at 0(FT1),5(FT2),10(FT3),15(FT4),and 20(FT5)days after the first flower appeared in the field and one three-split fertilizer application taken as the conventional control(FT6),making six treatments altogether.Cotton growth period,biomass accumulation,yield,and its formation were quantified.The results showed that the one-time fertilization did not affect the cotton growth progress as compared to FT6,however,the total crop cycles for FT3–FT5 were 3 days shorter.FT1 produced the highest cotton lint yield(1396 kg ha–1),which was similar to the FT6 but higher than the other treatments,and could be attributed to more bolls per unit area and higher lint percentage.Cotton yield was positively correlated with cotton plant biomass accumulated.FT1 had both the highest average(VT)(193.7 kg ha–1 d–1)and the highest maximum(VM)(220.9 kg ha–1 d–1)rates during the fast biomass accumulation period.These results suggest that one-time fertilizer application at the first flower stage might be an adjustment that is more effective than at first bloom,and allowed for easier decision making for application date due to non counting of plants with flowers is needed.

FIRST-PASSAGE TIME OF QUASI-NON-INTEGRABLE-HAMILTONIAN SYSTEM

Studies on first-passage failure are extended to the multi-degree-of-freedom quasi-non-integrable-Hamiltonian systems under parametric excitations of Gaussian white noises in this paper. By the stochastic averaging method of energy envelope, the system's energy can be modeled as a one-dimensional approximate diffusion process by which the classical Pontryagin equation with suitable boundary conditions is applicable to analyzing the statistical moments of the first-passage time of an arbitrary order. An example is studied in detail and some numerical results are given to illustrate the above procedure.

Consensus problems of first-order dynamic multi-agent systems with multiple time delays

Consensus problems of first-order multi-agent systems with multiple time delays are investigated in this paper. We discuss three cases： 1） continuous, 2） discrete, and 3） a continuous system with a proportional plus derivative controller. In each case, the system contains simultaneous communication and input time delays. Supposing a dynamic multi-agent system with directed topology that contains a globally reachable node, the sufficient convergence condition of the system is discussed with respect to each of the three cases based on the generalized Nyquist criterion and the frequency-domain analysis approach, yielding conclusions that are either less conservative than or agree with previously published results. We know that the convergence condition of the system depends mainly on each agent’s input time delay and the adjacent weights but is independent of the communication delay between agents, whether the system is continuous or discrete. Finally, simulation examples are given to verify the theoretical analysis.

Structural first failure times under non-Gaussian stochastic behavior

An analytical moment-based method for calculating structuralfirst failure times under non-Gaussian stochastic behavior is proposed. In the method, a power series that constants can be obtained from response moments （skewness, kurtosis, etc.） is used firstly to map a non-Gaussian structural response into a standard Gaussian process, then mean up-crossing rates, mean clump size and the initial passage probability of a critical barrier level by the original structural response are estimated, and finally, the formula for calculating first failure times is established on the assur^ption that corrected up-crossing rates are independent. An analysis of a nonlinear single-degree-of-freedom dynamical system excited by a Gaussian model of load not only demonstrates the usage of the proposed method but also shows the accuracy and efficiency of the proposed method by comparisons between the present method and other methods such as Monte Carlo simulation and the traditional Gaussian model.

The mean first passage time of a three-level atomic optical bistable system subjected to noise

The transient properties of a three-level atomic optical bistable system in the presence of multiplicative and additive noises are investigated. The explicit expressions of the mean first-passage time （MFPT） of the transition from the high intracavity intensity state to the low one are obtained by numerical computations. The impacts of the intensities of the multiplicative noise DM and the additive noise DA, the intensity of correlation between two noises λ, and the intensity of the incident light y on the MFPT are discussed, respectively. Our results show： （i） for the case of no correlation between two noises （2, = 0.0）, the increase in DM and DA can lead to an increase in the probability of the transition to the low intracavity intensity state, while the increase in y can lead to a retardation of the transition; and （ii） for the case of correlation between two noises （λ≠ 0.0）, the increase in λ can cause an increase in the probability of the transition, and the increase in DA can cause a retardation of the transition firstly and then an increase in the probability of the transition, i.e., the noise-enhanced stability is observed for the case of correlation between two noises.