Ke-qin Zhou

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We consider a continuous-space shortest path problem in a two-dimensional plane. This is the problem of finding a trajectory that starts at a given point, ends at the boundary of a compact set of <, and minimizes a cost function of the form s 0 r(x(t)) dt + q(x(T )). For a discretized version of this problem, a Dijkstra-like method that requires one(More)
The virtual campus is an information management system based on a digital data of integrated campus information including geography and other information. In this paper, we take an example of Beijing Institute of Civil Engineering and Architecture zhanlan road campus, based on MapObjects platform, introduces the flow of the system, the application of(More)
Organic amendments are an option in enhancing soil biological productivity. Limited research exists on the effects of long-term cattle manure addition on low-molecular-weight organic acids (LMWOAs) concentrations in corn (Zea mays L) and soybean (Glycine max L.) fields in the region of soil erosion. The purpose of this study was to investigate the potential(More)
In this paper we study the effect of NbN-Au contact pads on the performance of a superconducting NbN hot electron bolometer (HEB) mixer. The receiver noise temperature (Trec) and IF noise bandwidth (BN) at a LO frequency of 1.3 THz are measured at different bath temperatures between 3.3 K and 8.5 K. The measured Trec and BN of the superconducting HEB mixer(More)
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