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| 1 | The structure of instantaneous frequencies of periodic analytic signals显示文摘In this paper, the structure of analytic signals is investigated by means of the relation between analytic signals and functions in the Hardy space. It is shown that an analytic signal is made up of two parts, one depending on the amplitude of the signal and another on the boundary value of an inner function. Based on this result, properties of the instantaneous frequencies of these two parts are studied, and it is found that negative instantaneous frequencies are caused by the amplitude of a signal. Finally, such conditions that an analytic signal is of positive instantaneous frequency are presented. | Tan LiHui Yang LiHua Huang DaRen | 2010 | Science China Mathematics2010，53，2： | 7 |
| 2 | SYSTEMATIC METHOD TO GENERATE NEW IDEAS IN FUZZY FRONT END USING TRIZ显示文摘The obstacle for idea generation in fuzzy fi'ont end (FFE) is difficult to apply knowledge in different fields for designers.Theory of inventive problem solving TRIZ and computer-aided innovation systems (CAIs) which are TRIZ-base software systems with a knowledge base provide a framework for knowledge application in different fields.The major methods in TRIZ are selected, which have four types.The problems to be solved for each method are summarized and mapping from the problems to the methods is given.Systematic method with eight paths to integrate the methods and problems is formed.A case study shows the idea generation in FFE using the integrated method step by step. | TAN Runhua MA Lihui YANG Bojun SUN Jianguang | 2008 | Chinese Journal of Mechanical Engineering2008，21，2： | 6 |
| 3 | The mechanical property and corrosion resistance of Mg-Zn-Nd alloy fine wires in vitro and in vivo显示文摘Titanium and its alloy are commonly used as surgical staples in the reconstruction of intestinal tract and stomach,however they cannot be absorbed in human body,which may cause a series of complications to influence further diagnosis.Magnesium and its alloy have great potential as surgical staples,because they can be degraded in human body and have good mechanical properties and biocompatibility.In this study,Mg-2Zn-0.5Nd(ZN20)alloy fine wires showed great potential as surgical staples.The ultimate tensile strength and elongation of ZN20 alloy fine wires were 248 MPa and 13%,respectively,which could be benefit for the deformation of the surgical staples from U-shape to B-shape.The bursting pressure of the wire was about 40 kPa,implying that it can supply sufficient mechanical support after anastomosis.Biochemical test and histological analysis illustrated good biocompatibility and biological safety of ZN20 alloy fine wire.The residual tensile stress formed on the outside of ZN20 fine wire during drawing would accelerate the corrosion.The second phase had a negative influence on corrosion property due to galvanic corrosion.The corrosion rate in vitro was faster than that in vivo due to the capsule formed on the surface of ZN20 alloy fine wire. | Ming Gao Di Na Xiangqiao Ni Lihui Song Iniobong PEtim Ke Yang Lili Tan Zheng Ma | 2021 | Bioactive Materials2021，6，1： | 4 |
| 4 | Extracting outer function part from Hardy space function显示文摘Any analytic signal fa(e^(it)) can be written as a product of its minimum-phase signal part(the outer function part) and its all-phase signal part(the inner function part). Due to the importance of such decomposition, Kumarasan and Rao(1999), implementing the idea of the Szeg?o limit theorem(see below),proposed an algorithm to obtain approximations of the minimum-phase signal of a polynomial analytic signal fa(e^(it)) = e^(iN0t)M∑k=0a_k^(eikt),(0.1)where a_0≠ 0, a_M≠ 0. Their method involves minimizing the energy E(f_a, h_1, h_2,..., h_H) =1/(2π)∫_0^(2π)|1+H∑k=1h_k^(eikt)|~2|fa(e^(it))|~2dt(0.2) with the undetermined complex numbers hk's by the least mean square error method. In the limiting procedure H →∞, one obtains approximate solutions of the minimum-phase signal. What is achieved in the present paper is two-fold. On one hand, we rigorously prove that, if fa(e^(it)) is a polynomial analytic signal as given in(0.1),then for any integer H≥M, and with |fa(e^(it))|~2 in the integrand part of(0.2) being replaced with 1/|fa(e^(it))|~2,the exact solution of the minimum-phase signal of fa(e^(it)) can be extracted out. On the other hand, we show that the Fourier system e^(ikt) used in the above process may be replaced with the Takenaka-Malmquist(TM) system, r_k(e^(it)) :=((1-|α_k|~2e^(it))/(1-α_ke^(it))^(1/2)∏_(j=1)^(k-1)(e^(it)-α_j/(1-α_je^(it))^(1/2), k = 1, 2,..., r_0(e^(it)) = 1, i.e., the least mean square error method based on the TM system can also be used to extract out approximate solutions of minimum-phase signals for any functions f_a in the Hardy space. The advantage of the TM system method is that the parameters α_1,..., α_n,...determining the system can be adaptively selected in order to increase computational efficiency. In particular,adopting the n-best rational(Blaschke form) approximation selection for the n-tuple {α_1,..., α_n}, n≥N, where N is the degree of the given rational analytic signal, the minimum-phase part of a rational analytic signal can be accurately and efficiently extracted out. | TAN LiHui QIAN Tao | 2017 | Science China Mathematics2017，60，11： | 2 |
| 5 | TRIZ Ap- plication in Conceptual Design of Packaging Machine for Dropping Pill of Chinese Traditional Medicine 显示文摘 | Ma Lihui Tan Runhua Zhang Huangao | 2006 | Man- agement of Innovation and Technology2006，，2123： | 1 |
| 6 | Effect of desiccation on regeneration frequency of green plantlets and some biochemical properties of calli of wild rice显示文摘Wild rice is an important resource of useful genes to rice breeders. However, low regeneration frequency is an obstacle to use the valuable genes. We used desiccation to improve the regeneration frequency and studied the biochemical changes of calli of wild rice after desiccation, | TAN Guangxuan, Dept of Biology, Zhoukou Teacher’s College, Zhoukou 466000 SHU Lihui and HE Guangcun, College of Life Sci, Wuhan Univ, Wuhan 430072, China | 1998 | Chinese Rice Research Newsletter1998，6，4： | 0 |
| 7 | A class of iterative greedy algorithms related to Blaschke product显示文摘Mobius transforms,Blaschke products and starlike functions as typical conformal mappings of one complex variable give rise to nonlinear phases with non-negative phase derivatives with the latter being de ned by instantaneous frequencies of signals they represent.The positive analytic phase derivative has been a widely interested subject among signal analysts(see Gabor(1946)).Research results of the positive analytic frequency and applications appears in the literature since the middle of the 20th century.Of the positive frequency study a directly related topic is positive frequency decomposition of signals.The mainly focused methods of such decompositions include the maximal selection method and the Blaschke product unwinding method,and joint use of the mentioned methods.In this paper,we propose a class of iterative greedy algorithms based on the Blaschke product and adaptive Fourier decomposition.It generalizes the Blaschke product unwinding method by subtracting constants other than the averages of the remaining functions,aiming at larger winding numbers,and subtracting n-Blaschke forms of the remaining functions,aiming at generating larger numbers of zero-crossings,to fast reduce energy of the remaining terms.Furthermore,we give a comprehensive and rigorous proof of the converging rate in terms of the zeros of the remainders.Finite Blaschke product methods are proposed to avoid the in nite phase derivative dilemma,and to avoid the computational diculties. | Tao Qian Lihui Tan Jiecheng Chen | 2021 | Science China Mathematics2021，64，12： | 0 |
| 8 | Study on Accumulation and Dynamic Changes of Three Carbohydrates in Jerusalem Artichoke in Natural Habitats显示文摘Two varieties of Jerusalem artichoke (early maturing variety Qingyu No.1 and middle maturing variety Qingyu No.2),which were bred independently by Research and Development Center of Jerusalem Artichoke,Qinghai Academy of Agriculture and Forestry,were used as materials,and the content and dynamic changes of three kinds of carbohydrates (sucrose,glucose and fructose) in various organs of Jerusalem artichoke in different periods in two natural habitats (water plain and low hill dry land) were studied.The results showed that the content of the three kinds of carbohydrates in Qingyu No.1 and Qingyu No.2 in the water plain and low hill dry land was relatively high in late June and late August.The total content of the three carbohydrates in Qingyu No.1 peaked earlier than that of Qingyu No.2.The total content of the three carbohydrates in the water plain peaked earlier than that of the low hill dry land.In the whole growth period,the total content of the three carbohydrates in the stems and roots of Jerusalem artichoke was higher than that of the leaves.In the leaves,fructose accumulation was relatively obvious in the whole growth period,and the content was high,followed by glucose.In the stems and roots,fructose content was high,followed by sucrose.In the tubers,glucose accumulation was obvious,and sucrose content was lower than glucose and fructose content.When the tubers were harvested,fructose content was high. | Lihui WANG Xuemei SUN Long TAN Yi LI | 2019 | Agricultural Biotechnology2019，8，3： | 0 |
| 9 | Inhibitory Effect of Extracts from Helianthus tuberosus Leaves against Phytophthora capsici and Pot Verification Test显示文摘By growth rate method,the inhibitory effects of five solvent extracts from Helianthus tuberosus leaves against Phytophthora capsici were studied in the test.The results showed that different solvent extracts all had inhibitory effect against P.capsici,while 12.5mg/mL of extracts from H.tuberosusleaves with petroleum ether and ethyl acetate as solvents had the highest inhibitory effect against P.capsici,reaching 100%.In case of various solvent extracts with different concentration gradients,ethyl acetate extract had the most significant inhibitory effect;when the concentration was 5mg/mL,the inhibitory effect of ethyl acetate extract had reached 100%;when the concentration reduced to 2.5mg/mL,the inhibitory effect was still(27.91±2.076)%,significantly higher than that of other solvent extracts at the same concentration.The 50 times dilution of ethyl acetate extract fromH.tuberosusleaves was selected for pot test against pepper blight.,and the results showed that its control effect against pepper blight reached 100.00%,superior than that of chemical agent 25% metalaxyl WP 400 times dilution. | Li Yi Wang Lihui Han Rui Fu Yingkun Tan Long | 2015 | Plant Diseases and Pests2015，6，2： | 0 |
| 10 | Application Potential of Mg–Zn–Nd Alloy as a Gastrointestinal Anastomosis Nail Material显示文摘Gastrointestinal tumors are common malignant tumors in the digestive tract, of which gastric cancer is the third leading cause of cancer death and colorectal cancer is the fourth most deadly cancer. Nowadays, surgical resection remains to be one of the main measures for treating digestive tract tumors, and gastrointestinal anastomosis remains to be a key step in gastrointestinal surgery. Mg and its alloys have great potentials to be used for gastrointestinal anastomosis as anastomotic nail materials due to their biodegradability, good mechanical properties and biocompatibility. In this study, Mg–2Zn–0.5Nd(ZN20) alloy fine wires showed great potential as surgical staples. When we performed in vitro corrosion experiments, drainage fluid was collected from different parts of the patient’s abdominal cavity after surgery for the first time to replace the traditional simulation fluid and to more realistically simulate the microenvironment required by the anastomotic nail. ZN20 alloy has an ultimate tensile strength of 256 MPa, an elongation rate of 12.56%, a tensile force in anastomosis of 16.8 N, and a rupture pressure after anastomosis at 17 kPa, which means that a sufficient mechanical support was provided after anastomosis.The statistical analysis and histopathological analysis of biochemical tests indicate that ZN20 alloy has no adverse effect on the normal metabolism of liver, kidney and body, but has superior biocompatibility and biosafety. This work confirms that ZN20 possesses a great application potential in the clinical field as a new type of gastrointestinal anastomotic nail material. | Lihui Song Ming Gao Lili Tan Zheng Ma Peng Ni Min Zhou Di Na | 2022 | Acta Metallurgica Sinica(English Letters)2022，35，4： | 0 |
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