Retrospective analysis is used in this paper on the development of molecular imaging and the application of magnetic nano-probes for recent years in order to raise the awareness of the important value of magnetic biological probes in MR molecular imaging area. This paper is based on the broad research of all kinds of domestic and overseas literature regarding nanoprobes research and development and clinical application to offer the summary analysis on current research and development of molecular imaging and magnetic nano-probes and their clinical application. It is found in this article that magnetic nano-probe plays a key role in MR molecular imaging area and it has very broad prospects as well. Research and development of new types of nano-probes especially the development and clinical application of targeted nanoprobes are benefiting early diagnosis and targeted therapy of various diseases which achieves the real-time monitoring and evaluation of it.
Feature and development of cartridge valve are introduced, also the application of cartridge valve in industrial field of China. Analyze a case of using cartridge valve group to control the differential cylinder, by analyzing the problem and solution indicate the factors which should be pay attention to in using the cartridge valve.
In recent years,high concentration of insoluble iron sulfides,including Fe S2 and Fe S,have been found in the marine wooden shipwrecks. These iron sulfides can be oxidized to form sulfuric acid,which rapidly damages the wood cellulose when the wooden shipwrecks are exposed to conditions of high humidity and oxygen. Removal of those pyrite compounds is currently a problem worldwide. This paper summarizes some preliminary research to remove iron sulfides in the wrecks of wooden Qing Dynasty ships in Ningbo,Zhejiang Province,China. In addition,a new reagent named EDTAHO that uses a combination of a metal complex and an oxidant has been developed to remove the iron sulfides. The test results are satisfactory and should prove useful for future conservation work involving dehydration and reinforcement of wooden marine shipwreck relics.
In any balance state of metallurgical processes, there contains an optimal balance model among the collection of input and output. The best state in the produce can be obtained by changing the produce conditions. In order to find the best state, JinChang metallurgical factory has tackled a topic about the primarily smelting system. Based on the conservation of mass and energy, a optimal theoretical model was established on the smelting system which leaded by Ausmelt stove. Under the optimal theoretical model, the costs can be reduced by 207.89 yuan per ton of blister copper. In this paper, the basic principles on the model established are summarized.
In eukaryotes,WD40 family protein CDT2 is an important component of CUL4-DDB1 E3 ligase complex.It serves as a linker between CUL4-DDB1 and its target protein,then achieves degradation of the target protein.With 3'RACE and RT-PCR technique,we cloned a tomato gene named SlWD1,which is homologous of HsCDT2 in Homo sapiens.Amino acid sequence alignment of SlWD1/CDT2 proteins from different species showed that two conserved DWD Box domains were contained in SlWD1.Yeast two-hybrid and CO-IP assays both suggested the interaction between tomato DDB1 and SlWD1.Real-time PCR analysis indicated that SlWD1 gene expressed in all tested tissues,suggesting the expression pattern of SlWD1 was constitutive expression.However,the expression level of SlWD1 was much higher in reproductive organs than in other tissues.
Rural water conservancy installations are the strategy basis and the main ensure..In order to ensure the adjustment of agriculture structure,according to the present situation of Lingqiu's rural water conservancy,this paper presents the opinions to stengthen rural water conservancy construction from four aspects.They are farmland water conservancy construction,eco-environment construction,optimizing water resources allocation and deepening water conservancy reform.
The self-organizing theory is a subject that studies complicated system,which formed and developed in last century.It has already widely applied to such fields as physics,living beings,society,economic management,etc.The authors make a definition of the enterprise's flexible manufacturing system according to the changes of market demand and the needs of competi- tion at present,and analyze the properties and characters of it.The authors think this system is qualified to form dissipative structure. In order to improve the operational efficiency of enterprise's flexible manufacturing system,the authors propose some suggestions and measures according to the self-organizing theory.
A switching circuit with a high conversion ratio is proposed in this paper,due to the fact that it is difficult for the basic line frequency voltage-multiplying rectifier to keep its output voltage constant when the load varies,and its windings and volume of the set-up transformer are large. The proposed circuit operated in discontinuous conduction mode,and its operation was divided into three subintervals. The steady-state gain function for output voltage verse input voltage was derivate by virtual capacitor method and average modeling. The switching circuit combined merits of the voltage-multiplier with flyback converters. It was very suitable for low-power high-voltage power applications where small size and high conversion ratio were needed. The operations and prominent characteristics of the converter were described. A laboratory prototype was built based on the analysis. The effectiveness of proposed approach is verified by experimental results.
Along with the continuously accelerating of national industrialization process, the development depth and development area of coal resources are continuously expanding, predicting that the influence of water hazard on coal mine is constantly deepen. Being as one of the five natural hazards, the water hazard leads to enormous losses of the people and state properties, therefore, studying the causes and types of coal mine’s water hazard and formulating relevant safety precautions based on this have important significance on guiding the safety in production of coal mine. This paper emphatically analyzes the types and causes of coal mine’s water hazard, and based on this, puts forward some precautions.
Cities are impacted in the process of globalization,which is the inevitable result of social development.Under the background of the globalization of the urban development,there are two tendencies,which are of the same importance.The one is to seek things in common and the other is to follow our own points which are different from others.In the strong tide of the world development,if we follow the development rules,we will be prosperous.If not,we will fail.Only by seeking the common things,can we melt ourselves into the world and can we development even faster.At the same time,what belongs to nature belongs to the human being;what belongs to the nation belongs to the world.Only by seeking our own things,can we not be lost ourselves and can we develop better without following others blindly.China is a great country with five thousand years'brilliant cultures and civilization which are our great treasures.So it is our unshirkable duty to fully excavate the local culture in the process of the urban development and to apply it in the plan of the urban development to guide the city development.Many historical cultural cities lose their historical reality,life reality and shape integrity because of lack of the protection or without repair for many years,or damage from improper constructions.It is the time for us to save them.The best way to the urban development is to fully excavate the true meaning of the culture,keep and carry on the good traditions and combine the history with the modern characteristics beautifully.
