Kunming, China

Yunnan Nationalities University , located in Kunming City, China, at 134 Yi Er Yi Avenue, Kunming. Wikipedia.

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Yunnan Nationalities University, Hong Kong University of Science and Technology | Date: 2012-04-17

Use of amide compounds represented by formula (I), for preventing or reducing settlement and/or fouling of marine fouling organisms on a surface of a submerged object is provided, wherein -A- has a formula -(CnH2(nm))- which is either unsubstituted or substituted by one or more C1 to C4 alkyls, and wherein the formula -(CnH2(nm))- represents a divalent alkyl, or a divalent alkenyl having one or more double bonds, n is 1 to 15, m is 0 to 4, and 2(nm)=2, and R is selected from piperidinyl, pyrrolidinyl, isobutylamino, piperazinyl or morpholinyl. Amide compounds of formula (I), a category of antifouling compounds, can be either isolated from natural resources or synthesized, which are nontoxic and environmental-friendly.

Yunnan Nationalities University and Hong Kong Baptist University | Date: 2012-12-28

The present invention relates to a type of norcantharidin analogues and a method to synthesis such norcantharidin analogues by transition metal-catalyzed alkynylation of 7-oxabenzonorbornadienes. The present invention also relates to the use of such norcantharidin analogues in manufacture of a medicament for the treatment of cancer tumors.

Pei R.,Columbia University | Matamoros E.,Columbia University | Liu M.,Columbia University | Liu M.,Yunnan Nationalities University | And 2 more authors.
Nature Nanotechnology | Year: 2010

Research at the interface between chemistry and cybernetics has led to reports of ' programmable molecules', but what does it mean to say ' we programmed a set of solution-phase molecules to do X'? A survey of recently implemented solution-phase circuitry indicates that this statement could be replaced with ' we pre-mixed a set of molecules to do X and functional subsets of X'. These hard-wired mixtures are then exposed to a set of molecular inputs, which can be interpreted as being keyed to human moves in a game, or as assertions of logical propositions. In nucleic acids-based systems, stemming from DNA computation, these inputs can be seen as generic oligonucleotides. Here, we report using reconfigurable nucleic acid catalyst-based units to build a multipurpose reprogrammable molecular automaton that goes beyond single-purpose ' hard-wired' molecular automata. The automaton covers all possible responses to two consecutive sets of four inputs (such as four first and four second moves for a generic set of trivial two-player two-move games). This is a model system for more general molecular field programmable gate array (FPGA)-like devices that can be programmed by example, which means that the operator need not have any knowledge of molecular computing methods. © 2010 Macmillan Publishers Limited. All rights reserved.

Gu L.,Yunnan Nationalities University | Jin C.,Changzhou Tianma Group Company Ltd
Organic and Biomolecular Chemistry | Year: 2012

A new procedure is developed for the synthesis of α-aminophosphonates containing thiazole[5,4-b]pyridine moiety from conveniently available starting materials. The target compounds were characterized by infrared, 1H NMR, 13C NMR, 31P NMR, mass spectrometry and elemental analysis. The newly synthesized compounds were evaluated for their anticancer activities against PC-3, Bcap-37, H460 cells in vitro by the MTT method. Compounds 3b and 3f are highly effective against PC-3, Bcap-37 cells and good to H460 cells. Further study is necessary to find out the potential antitumor activities. This journal is © 2012 The Royal Society of Chemistry.

Gu L.-J.,Yunnan Nationalities University | Jin C.,New United Group Company Ltd | Wang R.,Yunnan Nationalities University | Ding H.-Y.,Yunnan Nationalities University
ChemCatChem | Year: 2014

A rhodium-catalyzed cyanation of chelation assisted C-H bonds is described. This process provided a useful method for the preparation of diverse 2-cyanated arylphosphonate and related compounds in good yields. The reaction tolerates a variety of synthetically important functional groups. A question of chelation: A rhodium-catalyzed cyanation of chelation assisted C-H bonds is described employing NCTS as an efficient cyanating reagent. The present method allowed the synthesis of various 2-cyanated arylphosphonate and related compounds in moderate to good yield. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Gu L.,Yunnan Nationalities University | Jin C.,New United Group Company Ltd | Liu J.,Yunnan Nationalities University | Ding H.,Yunnan Nationalities University | Fan B.,Yunnan Nationalities University
Chemical Communications | Year: 2014

6-Aryl substituted phenanthridines were synthesized via a visible-light-catalyzed cyclization of 2-isocyanobiphenyls with arylsulfonyl chlorides under oxidant-free and transition-metal-free conditions. This transformation represents an efficient and attractive synthetic utilization of arylsulfonyl chlorides. © the Partner Organisations 2014.

Lei J.,Yunnan Nationalities University
Proceedings 2011 International Conference on System Science and Engineering, ICSSE 2011 | Year: 2011

The problem of optimal vibration control for nonlinear vehicle suspensions based on in-vehicle networks is considered. The paper addresses this problem to design a suboptimal vibration controller for nonlinear sampled-data system with actuator and sensor delays. Employing the successive approximation approach, the nonlinear suboptimal control law is derived from a Riccati equation, a Stein equation, and sequences of adjoint vector difference equations, which consists of a feedback and feedforward term, a nonlinear compensator term, and some control memory terms. The existence and uniqueness of the optimal control law are proved. Furthermore, the controller is applied into a quarter-car suspension model and numerical simulations are given. Based on the analysis and simulations, the results validate the effectiveness of the designed control. And the proposed approach is feasible and easy to implement. © 2011 IEEE.

Shao Z.,Yunnan Nationalities University | Shao Z.,Yunnan University | Zhang H.,Yunnan University
Chemical Society Reviews | Year: 2012

Transition metal-catalyzed cross-coupling reactions have been established as one of the most powerful tools for the construction of C-C and C-X bonds. In this context, the development of novel metal-catalyzed cross-coupling processes that do not require stoichiometric organometallic reagents is particularly attractive. Recently, N-tosylhydrazones have emerged as a new type of versatile coupling partners for transition metal-catalyzed cross-coupling reactions as well as metal-free cross-coupling reactions, and have attracted increasing attention. This tutorial review summarizes recent important developments in this area with N-tosylhydrazones as versatile coupling partners. © 2012 The Royal Society of Chemistry.

Wu H.,Yunnan Nationalities University | Zeng Y.,Yunnan Nationalities University
IEEE Transactions on Automation Science and Engineering | Year: 2010

In a dynamic framed slotted aloha RFID system, the key technique can be divided into two parts: precisely estimating tag quantity and determining an optimal frame length. For estimating tag quantity, this paper uses three risk functions to propose three Bayesian estimates, and improves the estimates to reduce computational complexity. For determining an optimal frame length, this paper derives an optimal frame length, which can make the system achieve maximum channel usage efficiency under the condition that the durations of an idle, a collision and a successful slot are not identical. In our simulations, comparison with several conventional tag estimates shows that the proposed Bayesian tag estimates have less error. In addition, the improved estimates have lower computational complexity and their estimate performance is not reduced. The simulations results also indicate that the derived optimal frame length guarantees the maximum channel usage efficiency. © 2010 IEEE.

Wu H.,Yunnan Nationalities University | Zeng Y.,Yunnan Nationalities University
IEEE Transactions on Automation Science and Engineering | Year: 2011

In this paper, we propose a novel efficient frame slotted aloha (EFSA) protocol for radio frequency identification (RFID) tag anticollision in this paper. After successfully identifying each tag, the EFSA protocol will allocate the tag a slot number, which signifies when the tag could be identified during a read cycle. When no tags arrive and leave, idle slots and collision slots will not be produced in subsequent read cycles. In addition, if there is a collision slot in the EFSA protocol, colliding tags in the collision slot will be resolved by Q-ary splitting where Q is equal to the estimated number of colliding tags, while the other unidentified tags is in a waiting state until the colliding tags are successfully resolved. Since allocation of tags to slots is not random in the EFSA protocol, conventional tag quantity estimates are not suitable. Therefore, we also propose a novel tag quantity estimate for the EFSA protocol. Simulation results show that the EFSA protocol outperforms conventional protocols, in term of time slots of reidentifying tags, and the proposed estimate error is less than the conventional estimates in the EFSA protocol. © 2011 IEEE.

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